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000
FXUS65 KVEF 250859 CCB
AFDVEF

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
200 AM PDT SAT APR 25 2015

.SYNOPSIS...COOL AND UNSETTLED WEATHER IS EXPECTED TODAY AS A STRONG
TROUGH MOVES THROUGH THE AREA. SHOWERS AND THUNDERSTORMS CAN BE
EXPECTED ACROSS THE SOUTHERN GREAT BASIN AND MOHAVE COUNTY WITH
SCATTERED TO ISOLATED SHOWER AND THUNDERSTORMS POSSIBLE ELSEWHERE.
VERY STRONG WINDS ARE ANTICIPATED ACROSS THE WESTERN MOJAVE DESERT
CREATING AREAS OF BLOWING DUST AND HAZE. IMPROVING CONDITIONS ARE
EXPECTED SUNDAY WITH A WARMING TREND COMMENCING DURING THE WORKWEEK.
&&

.SHORT TERM...THROUGH SATURDAY NIGHT.

VIGOROUS SHORTWAVE CURRENTLY MOVING THROUGH NORTHERN CALIFORNIA
WILL BE THE MAIN PLAYER IN OUR WEATHER TODAY BRINGING AREAS OF HIGH
WINDS AND SHOWER POTENTIAL.  SHOWERS WILL BE ON THE INCREASE DURING
THE DAY ACROSS THE SOUTHERN GREAT BASIN AND ESPECIALLY LINCOLN
COUNTY WHERE A WETTING RAIN IS LIKELY.  SOME THUNDERSTORM ACTIVITY
IS EXPECTED AS WELL AS MARGINAL INSTABILITY WILL BE IN PLACE IN
COMBINATION WITH STRONG FRONTOGENTIC FORCING.

MEANWHILE ACROSS THE WESTERN MOJAVE DESERT...STRONG WINDS WILL
CONTINUE TO BLOW EARLY SATURDAY BEFORE INTENSIFYING BY MID-MORNING.
WIND GUSTS EXCEEDING 60 MPH ARE LIKELY ACROSS MUCH OF THE WESTERN
DESERTS BY SATURDAY AFTERNOON WITH LOCALIZED GUSTS TO 70 MPH
POSSIBLE.  THIS MAGNITUDE OF WIND CAN CAUSE STRUCTURAL DAMAGE AND
MAKE FOR DANGEROUS DRIVING AND FLYING CONDITIONS IN THE AREA DUE TO
STRONG CROSS WINDS AND AREAS OF BLOWING DUST.  WINDY CONDITIONS WILL
EXTEND EAST ACROSS MOST OF SAN BERNARDINO COUNTY...SOUTHERN CLARK
COUNTY...AND MOHAVE COUNTY BUT WILL BE LESS SEVERE THAN ACROSS THE
FAR WESTERN DESERT.

BY LATE IN THE AFTERNOON A STRONG COLD FRONT WILL PUSH SOUTH ACROSS
THE REGION...SOME SHOWERS AND ISOLATED THUNDERSTORMS WILL BE
POSSIBLE AS THIS MOVES THROUGH EVEN ACROSS THE DESERT VALLEYS. BEST
CHANCE FOR SHOWERS IN THE LAS VEGAS VALLEY WILL BE IN THE 5PM TO
10PM TIME FRAME AS THE COLD FRONT PUSHES THROUGH THE AREA.

BY LATE SATURDAY EVENING THE TROUGH WILL SHIFT EASTWARD INTO ARIZONA
WITH PRECIPITATION BECOMING LIMITED TO MOHAVE COUNTY. WINDS ACROSS
THE WESTERN MOJAVE WILL GRADUALLY EASE BUT GUSTY CONDITIONS MAY
LINGER INTO THE EARLY MORNING HOURS.

.LONG TERM...SUNDAY MORNING THROUGH FRIDAY.

AT THE START OF THE LONG TERM PERIOD, OUR DEEP TROUGH THAT IS
PROVIDING THE SHOWER CHANCES AND WINDY CONDITIONS WILL BE JUST EAST
OF THE NEVADA-UTAH BORDER AND CONTINUE TO PUSH EAST. ANY SHOWERS
WOULD BE OVER EXTREME EASTERN LINCOLN COUNTY AND EASTERN MOHAVE
COUNTY EARLY IN THE DAY BEFORE DRY CONDITIONS SET IN. EXPECT GUSTY
NORTH WINDS OF 20-30 MPH ACROSS MUCH OF THE AREA, WITH HIGHER WIND
SPEEDS LIKELY ALONG THE COLORADO RIVER VALLEY. WILL KEEP AN EYE ON
THE POTENTIAL FOR A WIND HEADLINE FOR THE RIVER ZONES. BREEZY NORTH
WINDS WILL LINGER INTO MONDAY, YET LIGHTER THAN SUNDAY. STRONGEST
GUSTS WILL REMAIN ALONG THE COLORADO RIVER VALLEY. SUNDAY AFTERNOON
TEMPERATURES WILL CONTINUE TO RUN BELOW NORMAL FOR THIS TIME OF
YEAR, THEN TREND NEAR NORMAL FOR MONDAY.

WINDS WILL BE WEAKER AND TREND TOWARD TYPICAL DIURNAL DIRECTIONS
TUESDAY AND WEDNESDAY AS HIGH PRESSURE FULLY TAKES CONTROL.
TEMPERATURES WILL ALSO TREND MUCH WARMER THROUGH THE WEEK, WITH
AFTERNOON HIGHS CLIMBING ROUGHLY 10 DEGREES ABOVE NORMAL FOR THE
LATTER HALF OF THE WEEK. THERE REMAINS SOME DIFFERENCE IN STRENGTH
AND TIMING, BUT MODELS CONTINUE TO INDICATE A LOW PRESSURE SYSTEM
MOVING THROUGH THE PACIFIC NORTHWEST /PERHAPS NORTHERN CALIFORNIA/
LATE THURSDAY THROUGH FRIDAY. SOME BREEZY SOUTHWEST WINDS ARE
POSSIBLE THURSDAY AFTERNOON AND AGAIN FRIDAY. BREEZY CONDITIONS MAY
LAST INTO THE WEEKEND, AS SOME WEAK TROUGHING LINGERS ACROSS THE
GREAT BASIN. FOR NOW, IT APPEARS ANY MOISTURE WITH THIS TROUGH IS
EXTREMELY LIMITED AND SHOULD STAY NORTH OF THE FORECAST AREA.

&&

.AVIATION...FOR MCCARRAN...GUSTY SOUTH WINDS EXPECTED AGAIN TODAY
WITH SUSTAINED WINDS OF 15-25KTS EXPECTED AFTER 15Z WITH GUSTS AS
HIGH AS 35 KTS. SCT-BKN CLOUDS EXPECTED MUCH OF THE DAY WITH A COLD
FRONT EXPECTED TO MOVE THROUGH IN THE LATE AFTERNOON BETWEEN 00Z-04Z
RESULTING IN A WIND SHIFT TO NORTHWESTERLY WINDS OF 15 TO 20KTS
BEFORE GRADUALLY EASING SATURDAY NIGHT. SHOWERS POSSIBLE AT THE
AIRFIELD BETWEEN 23Z AND 04Z WITH CIGS AROUND 8K EXPECTED.
IMPROVEMENT IN SKY CONDITIONS EXPECTED AFTER 4Z.

.FOR THE REST OF SOUTHERN NEVADA...NORTHWEST ARIZONA...AND SOUTHEAST
CALIFORNIA...UNSETTLED WEATHER EXPECTED ACROSS THE REGION TODAY WITH
STRONG AND GUSTY WEST-SOUTHWEST WINDS EXPECTED ACROSS THE MOJAVE
DESERT EASTWARD INTO NORTHWEST ARIZONA. WINDS OF 20 TO 30 KTS WITH
GUSTS TO 40 EXPECTED WITH EVEN STRONGER WINDS IN THE KDAG AREA AND
FAR WESTERN MOJAVE DESERT WHERE GUSTS WILL EXCEED 50KTS. AREAS OF
BLOWING DUST LIKELY WITH DANGEROUS CROSSWINDS ON NORTH-SOUTH
ORIENTED RUNWAYS. FURTHER NORTH WIDESPREAD SHOWERS AND TSTORMS
LIKELY ACROSS THE SOUTHERN GREAT BASIN MAINLY NORTH OF KLAS THROUGH
00Z. SHOWERS EXPAND ACROSS NORTHWEST ARIZONA AND FAR SOUTHERN NEVADA
AFTER 00Z AS A COLD FRONT MOVES THROUGH AND WINDS SHIFT TO THE
NORTHWEST.

 &&

.SPOTTER INFORMATION STATEMENT...SPOTTERS SHOULD REPORT ACCORDING TO
STANDARD OPERATING PROCEDURES.

&&

$$

SHORT TERM/AVIATION...OUTLER
LONG TERM...PADDOCK

FOR MORE FORECAST INFORMATION...SEE US ON OUR WEBPAGE:

HTTP://WEATHER.GOV/LASVEGAS OR FOLLOW US ON FACEBOOK AND TWITTER




000
FXUS65 KVEF 250859 CCB
AFDVEF

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
200 AM PDT SAT APR 25 2015

.SYNOPSIS...COOL AND UNSETTLED WEATHER IS EXPECTED TODAY AS A STRONG
TROUGH MOVES THROUGH THE AREA. SHOWERS AND THUNDERSTORMS CAN BE
EXPECTED ACROSS THE SOUTHERN GREAT BASIN AND MOHAVE COUNTY WITH
SCATTERED TO ISOLATED SHOWER AND THUNDERSTORMS POSSIBLE ELSEWHERE.
VERY STRONG WINDS ARE ANTICIPATED ACROSS THE WESTERN MOJAVE DESERT
CREATING AREAS OF BLOWING DUST AND HAZE. IMPROVING CONDITIONS ARE
EXPECTED SUNDAY WITH A WARMING TREND COMMENCING DURING THE WORKWEEK.
&&

.SHORT TERM...THROUGH SATURDAY NIGHT.

VIGOROUS SHORTWAVE CURRENTLY MOVING THROUGH NORTHERN CALIFORNIA
WILL BE THE MAIN PLAYER IN OUR WEATHER TODAY BRINGING AREAS OF HIGH
WINDS AND SHOWER POTENTIAL.  SHOWERS WILL BE ON THE INCREASE DURING
THE DAY ACROSS THE SOUTHERN GREAT BASIN AND ESPECIALLY LINCOLN
COUNTY WHERE A WETTING RAIN IS LIKELY.  SOME THUNDERSTORM ACTIVITY
IS EXPECTED AS WELL AS MARGINAL INSTABILITY WILL BE IN PLACE IN
COMBINATION WITH STRONG FRONTOGENTIC FORCING.

MEANWHILE ACROSS THE WESTERN MOJAVE DESERT...STRONG WINDS WILL
CONTINUE TO BLOW EARLY SATURDAY BEFORE INTENSIFYING BY MID-MORNING.
WIND GUSTS EXCEEDING 60 MPH ARE LIKELY ACROSS MUCH OF THE WESTERN
DESERTS BY SATURDAY AFTERNOON WITH LOCALIZED GUSTS TO 70 MPH
POSSIBLE.  THIS MAGNITUDE OF WIND CAN CAUSE STRUCTURAL DAMAGE AND
MAKE FOR DANGEROUS DRIVING AND FLYING CONDITIONS IN THE AREA DUE TO
STRONG CROSS WINDS AND AREAS OF BLOWING DUST.  WINDY CONDITIONS WILL
EXTEND EAST ACROSS MOST OF SAN BERNARDINO COUNTY...SOUTHERN CLARK
COUNTY...AND MOHAVE COUNTY BUT WILL BE LESS SEVERE THAN ACROSS THE
FAR WESTERN DESERT.

BY LATE IN THE AFTERNOON A STRONG COLD FRONT WILL PUSH SOUTH ACROSS
THE REGION...SOME SHOWERS AND ISOLATED THUNDERSTORMS WILL BE
POSSIBLE AS THIS MOVES THROUGH EVEN ACROSS THE DESERT VALLEYS. BEST
CHANCE FOR SHOWERS IN THE LAS VEGAS VALLEY WILL BE IN THE 5PM TO
10PM TIME FRAME AS THE COLD FRONT PUSHES THROUGH THE AREA.

BY LATE SATURDAY EVENING THE TROUGH WILL SHIFT EASTWARD INTO ARIZONA
WITH PRECIPITATION BECOMING LIMITED TO MOHAVE COUNTY. WINDS ACROSS
THE WESTERN MOJAVE WILL GRADUALLY EASE BUT GUSTY CONDITIONS MAY
LINGER INTO THE EARLY MORNING HOURS.

.LONG TERM...SUNDAY MORNING THROUGH FRIDAY.

AT THE START OF THE LONG TERM PERIOD, OUR DEEP TROUGH THAT IS
PROVIDING THE SHOWER CHANCES AND WINDY CONDITIONS WILL BE JUST EAST
OF THE NEVADA-UTAH BORDER AND CONTINUE TO PUSH EAST. ANY SHOWERS
WOULD BE OVER EXTREME EASTERN LINCOLN COUNTY AND EASTERN MOHAVE
COUNTY EARLY IN THE DAY BEFORE DRY CONDITIONS SET IN. EXPECT GUSTY
NORTH WINDS OF 20-30 MPH ACROSS MUCH OF THE AREA, WITH HIGHER WIND
SPEEDS LIKELY ALONG THE COLORADO RIVER VALLEY. WILL KEEP AN EYE ON
THE POTENTIAL FOR A WIND HEADLINE FOR THE RIVER ZONES. BREEZY NORTH
WINDS WILL LINGER INTO MONDAY, YET LIGHTER THAN SUNDAY. STRONGEST
GUSTS WILL REMAIN ALONG THE COLORADO RIVER VALLEY. SUNDAY AFTERNOON
TEMPERATURES WILL CONTINUE TO RUN BELOW NORMAL FOR THIS TIME OF
YEAR, THEN TREND NEAR NORMAL FOR MONDAY.

WINDS WILL BE WEAKER AND TREND TOWARD TYPICAL DIURNAL DIRECTIONS
TUESDAY AND WEDNESDAY AS HIGH PRESSURE FULLY TAKES CONTROL.
TEMPERATURES WILL ALSO TREND MUCH WARMER THROUGH THE WEEK, WITH
AFTERNOON HIGHS CLIMBING ROUGHLY 10 DEGREES ABOVE NORMAL FOR THE
LATTER HALF OF THE WEEK. THERE REMAINS SOME DIFFERENCE IN STRENGTH
AND TIMING, BUT MODELS CONTINUE TO INDICATE A LOW PRESSURE SYSTEM
MOVING THROUGH THE PACIFIC NORTHWEST /PERHAPS NORTHERN CALIFORNIA/
LATE THURSDAY THROUGH FRIDAY. SOME BREEZY SOUTHWEST WINDS ARE
POSSIBLE THURSDAY AFTERNOON AND AGAIN FRIDAY. BREEZY CONDITIONS MAY
LAST INTO THE WEEKEND, AS SOME WEAK TROUGHING LINGERS ACROSS THE
GREAT BASIN. FOR NOW, IT APPEARS ANY MOISTURE WITH THIS TROUGH IS
EXTREMELY LIMITED AND SHOULD STAY NORTH OF THE FORECAST AREA.

&&

.AVIATION...FOR MCCARRAN...GUSTY SOUTH WINDS EXPECTED AGAIN TODAY
WITH SUSTAINED WINDS OF 15-25KTS EXPECTED AFTER 15Z WITH GUSTS AS
HIGH AS 35 KTS. SCT-BKN CLOUDS EXPECTED MUCH OF THE DAY WITH A COLD
FRONT EXPECTED TO MOVE THROUGH IN THE LATE AFTERNOON BETWEEN 00Z-04Z
RESULTING IN A WIND SHIFT TO NORTHWESTERLY WINDS OF 15 TO 20KTS
BEFORE GRADUALLY EASING SATURDAY NIGHT. SHOWERS POSSIBLE AT THE
AIRFIELD BETWEEN 23Z AND 04Z WITH CIGS AROUND 8K EXPECTED.
IMPROVEMENT IN SKY CONDITIONS EXPECTED AFTER 4Z.

.FOR THE REST OF SOUTHERN NEVADA...NORTHWEST ARIZONA...AND SOUTHEAST
CALIFORNIA...UNSETTLED WEATHER EXPECTED ACROSS THE REGION TODAY WITH
STRONG AND GUSTY WEST-SOUTHWEST WINDS EXPECTED ACROSS THE MOJAVE
DESERT EASTWARD INTO NORTHWEST ARIZONA. WINDS OF 20 TO 30 KTS WITH
GUSTS TO 40 EXPECTED WITH EVEN STRONGER WINDS IN THE KDAG AREA AND
FAR WESTERN MOJAVE DESERT WHERE GUSTS WILL EXCEED 50KTS. AREAS OF
BLOWING DUST LIKELY WITH DANGEROUS CROSSWINDS ON NORTH-SOUTH
ORIENTED RUNWAYS. FURTHER NORTH WIDESPREAD SHOWERS AND TSTORMS
LIKELY ACROSS THE SOUTHERN GREAT BASIN MAINLY NORTH OF KLAS THROUGH
00Z. SHOWERS EXPAND ACROSS NORTHWEST ARIZONA AND FAR SOUTHERN NEVADA
AFTER 00Z AS A COLD FRONT MOVES THROUGH AND WINDS SHIFT TO THE
NORTHWEST.

 &&

.SPOTTER INFORMATION STATEMENT...SPOTTERS SHOULD REPORT ACCORDING TO
STANDARD OPERATING PROCEDURES.

&&

$$

SHORT TERM/AVIATION...OUTLER
LONG TERM...PADDOCK

FOR MORE FORECAST INFORMATION...SEE US ON OUR WEBPAGE:

HTTP://WEATHER.GOV/LASVEGAS OR FOLLOW US ON FACEBOOK AND TWITTER





000
FXUS65 KVEF 250858 CCA
AFDVEF

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
200 AM PDT SAT APR 24 2015

.SYNOPSIS...COOL AND UNSETTLED WEATHER IS EXPECTED TODAY AS A STRONG
TROUGH MOVES THROUGH THE AREA. SHOWERS AND THUNDERSTORMS CAN BE
EXPECTED ACROSS THE SOUTHERN GREAT BASIN AND MOHAVE COUNTY WITH
SCATTERED TO ISOLATED SHOWER AND THUNDERSTORMS POSSIBLE ELSEWHERE.
VERY STRONG WINDS ARE ANTICIPATED ACROSS THE WESTERN MOJAVE DESERT
CREATING AREAS OF BLOWING DUST AND HAZE. IMPROVING CONDITIONS ARE
EXPECTED SUNDAY WITH A WARMING TREND COMMENCING DURING THE WORKWEEK.
&&

.SHORT TERM...THROUGH SATURDAY NIGHT.

VIGOROUS SHORTWAVE CURRENTLY MOVING THROUGH NORTHERN CALIFORNIA
WILL BE THE MAIN PLAYER IN OUR WEATHER TODAY BRINGING AREAS OF HIGH
WINDS AND SHOWER POTENTIAL.  SHOWERS WILL BE ON THE INCREASE DURING
THE DAY ACROSS THE SOUTHERN GREAT BASIN AND ESPECIALLY LINCOLN
COUNTY WHERE A WETTING RAIN IS LIKELY.  SOME THUNDERSTORM ACTIVITY
IS EXPECTED AS WELL AS MARGINAL INSTABILITY WILL BE IN PLACE IN
COMBINATION WITH STRONG FRONTOGENTIC FORCING.

MEANWHILE ACROSS THE WESTERN MOJAVE DESERT...STRONG WINDS WILL
CONTINUE TO BLOW EARLY SATURDAY BEFORE INTENSIFYING BY MID-MORNING.
WIND GUSTS EXCEEDING 60 MPH ARE LIKELY ACROSS MUCH OF THE WESTERN
DESERTS BY SATURDAY AFTERNOON WITH LOCALIZED GUSTS TO 70 MPH
POSSIBLE.  THIS MAGNITUDE OF WIND CAN CAUSE STRUCTURAL DAMAGE AND
MAKE FOR DANGEROUS DRIVING AND FLYING CONDITIONS IN THE AREA DUE TO
STRONG CROSS WINDS AND AREAS OF BLOWING DUST.  WINDY CONDITIONS WILL
EXTEND EAST ACROSS MOST OF SAN BERNARDINO COUNTY...SOUTHERN CLARK
COUNTY...AND MOHAVE COUNTY BUT WILL BE LESS SEVERE THAN ACROSS THE
FAR WESTERN DESERT.

BY LATE IN THE AFTERNOON A STRONG COLD FRONT WILL PUSH SOUTH ACROSS
THE REGION...SOME SHOWERS AND ISOLATED THUNDERSTORMS WILL BE
POSSIBLE AS THIS MOVES THROUGH EVEN ACROSS THE DESERT VALLEYS. BEST
CHANCE FOR SHOWERS IN THE LAS VEGAS VALLEY WILL BE IN THE 5PM TO
10PM TIME FRAME AS THE COLD FRONT PUSHES THROUGH THE AREA.

BY LATE SATURDAY EVENING THE TROUGH WILL SHIFT EASTWARD INTO ARIZONA
WITH PRECIPITATION BECOMING LIMITED TO MOHAVE COUNTY. WINDS ACROSS
THE WESTERN MOJAVE WILL GRADUALLY EASE BUT GUSTY CONDITIONS MAY
LINGER INTO THE EARLY MORNING HOURS.

.LONG TERM...SUNDAY MORNING THROUGH FRIDAY.

AT THE START OF THE LONG TERM PERIOD, OUR DEEP TROUGH THAT IS
PROVIDING THE SHOWER CHANCES AND WINDY CONDITIONS WILL BE JUST EAST
OF THE NEVADA-UTAH BORDER AND CONTINUE TO PUSH EAST. ANY SHOWERS
WOULD BE OVER EXTREME EASTERN LINCOLN COUNTY AND EASTERN MOHAVE
COUNTY EARLY IN THE DAY BEFORE DRY CONDITIONS SET IN. EXPECT GUSTY
NORTH WINDS OF 20-30 MPH ACROSS MUCH OF THE AREA, WITH HIGHER WIND
SPEEDS LIKELY ALONG THE COLORADO RIVER VALLEY. WILL KEEP AN EYE ON
THE POTENTIAL FOR A WIND HEADLINE FOR THE RIVER ZONES. BREEZY NORTH
WINDS WILL LINGER INTO MONDAY, YET LIGHTER THAN SUNDAY. STRONGEST
GUSTS WILL REMAIN ALONG THE COLORADO RIVER VALLEY. SUNDAY AFTERNOON
TEMPERATURES WILL CONTINUE TO RUN BELOW NORMAL FOR THIS TIME OF
YEAR, THEN TREND NEAR NORMAL FOR MONDAY.

WINDS WILL BE WEAKER AND TREND TOWARD TYPICAL DIURNAL DIRECTIONS
TUESDAY AND WEDNESDAY AS HIGH PRESSURE FULLY TAKES CONTROL.
TEMPERATURES WILL ALSO TREND MUCH WARMER THROUGH THE WEEK, WITH
AFTERNOON HIGHS CLIMBING ROUGHLY 10 DEGREES ABOVE NORMAL FOR THE
LATTER HALF OF THE WEEK. THERE REMAINS SOME DIFFERENCE IN STRENGTH
AND TIMING, BUT MODELS CONTINUE TO INDICATE A LOW PRESSURE SYSTEM
MOVING THROUGH THE PACIFIC NORTHWEST /PERHAPS NORTHERN CALIFORNIA/
LATE THURSDAY THROUGH FRIDAY. SOME BREEZY SOUTHWEST WINDS ARE
POSSIBLE THURSDAY AFTERNOON AND AGAIN FRIDAY. BREEZY CONDITIONS MAY
LAST INTO THE WEEKEND, AS SOME WEAK TROUGHING LINGERS ACROSS THE
GREAT BASIN. FOR NOW, IT APPEARS ANY MOISTURE WITH THIS TROUGH IS
EXTREMELY LIMITED AND SHOULD STAY NORTH OF THE FORECAST AREA.

&&

.AVIATION...FOR MCCARRAN...GUSTY SOUTH WINDS EXPECTED AGAIN TODAY
WITH SUSTAINED WINDS OF 15-25KTS EXPECTED AFTER 15Z WITH GUSTS AS
HIGH AS 35 KTS. SCT-BKN CLOUDS EXPECTED MUCH OF THE DAY WITH A COLD
FRONT EXPECTED TO MOVE THROUGH IN THE LATE AFTERNOON BETWEEN 00Z-04Z
RESULTING IN A WIND SHIFT TO NORTHWESTERLY WINDS OF 15 TO 20KTS
BEFORE GRADUALLY EASING SATURDAY NIGHT. SHOWERS POSSIBLE AT THE
AIRFIELD BETWEEN 23Z AND 04Z WITH CIGS AROUND 8K EXPECTED.
IMPROVEMENT IN SKY CONDITIONS EXPECTED AFTER 4Z.

.FOR THE REST OF SOUTHERN NEVADA...NORTHWEST ARIZONA...AND SOUTHEAST
CALIFORNIA...UNSETTLED WEATHER EXPECTED ACROSS THE REGION TODAY WITH
STRONG AND GUSTY WEST-SOUTHWEST WINDS EXPECTED ACROSS THE MOJAVE
DESERT EASTWARD INTO NORTHWEST ARIZONA. WINDS OF 20 TO 30 KTS WITH
GUSTS TO 40 EXPECTED WITH EVEN STRONGER WINDS IN THE KDAG AREA AND
FAR WESTERN MOJAVE DESERT WHERE GUSTS WILL EXCEED 50KTS. AREAS OF
BLOWING DUST LIKELY WITH DANGEROUS CROSSWINDS ON NORTH-SOUTH
ORIENTED RUNWAYS. FURTHER NORTH WIDESPREAD SHOWERS AND TSTORMS
LIKELY ACROSS THE SOUTHERN GREAT BASIN MAINLY NORTH OF KLAS THROUGH
00Z. SHOWERS EXPAND ACROSS NORTHWEST ARIZONA AND FAR SOUTHERN NEVADA
AFTER 00Z AS A COLD FRONT MOVES THROUGH AND WINDS SHIFT TO THE
NORTHWEST.

 &&

.SPOTTER INFORMATION STATEMENT...SPOTTERS SHOULD REPORT ACCORDING TO
STANDARD OPERATING PROCEDURES.

&&

$$

SHORT TERM/AVIATION...OUTLER
LONG TERM...PADDOCK

FOR MORE FORECAST INFORMATION...SEE US ON OUR WEBPAGE:

HTTP://WEATHER.GOV/LASVEGAS OR FOLLOW US ON FACEBOOK AND TWITTER




000
FXUS65 KVEF 250858
AFDVEF

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
200 AM PDT FRI APR 24 2015

.SYNOPSIS...COOL AND UNSETTLED WEATHER IS EXPECTED TODAY AS A STRONG
TROUGH MOVES THROUGH THE AREA. SHOWERS AND THUNDERSTORMS CAN BE
EXPECTED ACROSS THE SOUTHERN GREAT BASIN AND MOHAVE COUNTY WITH
SCATTERED TO ISOLATED SHOWER AND THUNDERSTORMS POSSIBLE ELSEWHERE.
VERY STRONG WINDS ARE ANTICIPATED ACROSS THE WESTERN MOJAVE DESERT
CREATING AREAS OF BLOWING DUST AND HAZE. IMPROVING CONDITIONS ARE
EXPECTED SUNDAY WITH A WARMING TREND COMMENCING DURING THE WORKWEEK.
&&

.SHORT TERM...THROUGH SATURDAY NIGHT.

VIGOROUS SHORTWAVE CURRENTLY MOVING THROUGH NORTHERN CALIFORNIA
WILL BE THE MAIN PLAYER IN OUR WEATHER TODAY BRINGING AREAS OF HIGH
WINDS AND SHOWER POTENTIAL.  SHOWERS WILL BE ON THE INCREASE DURING
THE DAY ACROSS THE SOUTHERN GREAT BASIN AND ESPECIALLY LINCOLN
COUNTY WHERE A WETTING RAIN IS LIKELY.  SOME THUNDERSTORM ACTIVITY
IS EXPECTED AS WELL AS MARGINAL INSTABILITY WILL BE IN PLACE IN
COMBINATION WITH STRONG FRONTOGENTIC FORCING.

MEANWHILE ACROSS THE WESTERN MOJAVE DESERT...STRONG WINDS WILL
CONTINUE TO BLOW EARLY SATURDAY BEFORE INTENSIFYING BY MID-MORNING.
WIND GUSTS EXCEEDING 60 MPH ARE LIKELY ACROSS MUCH OF THE WESTERN
DESERTS BY SATURDAY AFTERNOON WITH LOCALIZED GUSTS TO 70 MPH
POSSIBLE.  THIS MAGNITUDE OF WIND CAN CAUSE STRUCTURAL DAMAGE AND
MAKE FOR DANGEROUS DRIVING AND FLYING CONDITIONS IN THE AREA DUE TO
STRONG CROSS WINDS AND AREAS OF BLOWING DUST.  WINDY CONDITIONS WILL
EXTEND EAST ACROSS MOST OF SAN BERNARDINO COUNTY...SOUTHERN CLARK
COUNTY...AND MOHAVE COUNTY BUT WILL BE LESS SEVERE THAN ACROSS THE
FAR WESTERN DESERT.

BY LATE IN THE AFTERNOON A STRONG COLD FRONT WILL PUSH SOUTH ACROSS
THE REGION...SOME SHOWERS AND ISOLATED THUNDERSTORMS WILL BE
POSSIBLE AS THIS MOVES THROUGH EVEN ACROSS THE DESERT VALLEYS. BEST
CHANCE FOR SHOWERS IN THE LAS VEGAS VALLEY WILL BE IN THE 5PM TO
10PM TIME FRAME AS THE COLD FRONT PUSHES THROUGH THE AREA.

BY LATE SATURDAY EVENING THE TROUGH WILL SHIFT EASTWARD INTO ARIZONA
WITH PRECIPITATION BECOMING LIMITED TO MOHAVE COUNTY. WINDS ACROSS
THE WESTERN MOJAVE WILL GRADUALLY EASE BUT GUSTY CONDITIONS MAY
LINGER INTO THE EARLY MORNING HOURS.

.LONG TERM...SUNDAY MORNING THROUGH FRIDAY.

AT THE START OF THE LONG TERM PERIOD, OUR DEEP TROUGH THAT IS
PROVIDING THE SHOWER CHANCES AND WINDY CONDITIONS WILL BE JUST EAST
OF THE NEVADA-UTAH BORDER AND CONTINUE TO PUSH EAST. ANY SHOWERS
WOULD BE OVER EXTREME EASTERN LINCOLN COUNTY AND EASTERN MOHAVE
COUNTY EARLY IN THE DAY BEFORE DRY CONDITIONS SET IN. EXPECT GUSTY
NORTH WINDS OF 20-30 MPH ACROSS MUCH OF THE AREA, WITH HIGHER WIND
SPEEDS LIKELY ALONG THE COLORADO RIVER VALLEY. WILL KEEP AN EYE ON
THE POTENTIAL FOR A WIND HEADLINE FOR THE RIVER ZONES. BREEZY NORTH
WINDS WILL LINGER INTO MONDAY, YET LIGHTER THAN SUNDAY. STRONGEST
GUSTS WILL REMAIN ALONG THE COLORADO RIVER VALLEY. SUNDAY AFTERNOON
TEMPERATURES WILL CONTINUE TO RUN BELOW NORMAL FOR THIS TIME OF
YEAR, THEN TREND NEAR NORMAL FOR MONDAY.

WINDS WILL BE WEAKER AND TREND TOWARD TYPICAL DIURNAL DIRECTIONS
TUESDAY AND WEDNESDAY AS HIGH PRESSURE FULLY TAKES CONTROL.
TEMPERATURES WILL ALSO TREND MUCH WARMER THROUGH THE WEEK, WITH
AFTERNOON HIGHS CLIMBING ROUGHLY 10 DEGREES ABOVE NORMAL FOR THE
LATTER HALF OF THE WEEK. THERE REMAINS SOME DIFFERENCE IN STRENGTH
AND TIMING, BUT MODELS CONTINUE TO INDICATE A LOW PRESSURE SYSTEM
MOVING THROUGH THE PACIFIC NORTHWEST /PERHAPS NORTHERN CALIFORNIA/
LATE THURSDAY THROUGH FRIDAY. SOME BREEZY SOUTHWEST WINDS ARE
POSSIBLE THURSDAY AFTERNOON AND AGAIN FRIDAY. BREEZY CONDITIONS MAY
LAST INTO THE WEEKEND, AS SOME WEAK TROUGHING LINGERS ACROSS THE
GREAT BASIN. FOR NOW, IT APPEARS ANY MOISTURE WITH THIS TROUGH IS
EXTREMELY LIMITED AND SHOULD STAY NORTH OF THE FORECAST AREA.

&&

.AVIATION...FOR MCCARRAN...GUSTY SOUTH WINDS EXPECTED AGAIN TODAY
WITH SUSTAINED WINDS OF 15-25KTS EXPECTED AFTER 15Z WITH GUSTS AS
HIGH AS 35 KTS. SCT-BKN CLOUDS EXPECTED MUCH OF THE DAY WITH A COLD
FRONT EXPECTED TO MOVE THROUGH IN THE LATE AFTERNOON BETWEEN 00Z-04Z
RESULTING IN A WIND SHIFT TO NORTHWESTERLY WINDS OF 15 TO 20KTS
BEFORE GRADUALLY EASING SATURDAY NIGHT. SHOWERS POSSIBLE AT THE
AIRFIELD BETWEEN 23Z AND 04Z WITH CIGS AROUND 8K EXPECTED.
IMPROVEMENT IN SKY CONDITIONS EXPECTED AFTER 4Z.

.FOR THE REST OF SOUTHERN NEVADA...NORTHWEST ARIZONA...AND SOUTHEAST
CALIFORNIA...UNSETTLED WEATHER EXPECTED ACROSS THE REGION TODAY WITH
STRONG AND GUSTY WEST-SOUTHWEST WINDS EXPECTED ACROSS THE MOJAVE
DESERT EASTWARD INTO NORTHWEST ARIZONA. WINDS OF 20 TO 30 KTS WITH
GUSTS TO 40 EXPECTED WITH EVEN STRONGER WINDS IN THE KDAG AREA AND
FAR WESTERN MOJAVE DESERT WHERE GUSTS WILL EXCEED 50KTS. AREAS OF
BLOWING DUST LIKELY WITH DANGEROUS CROSSWINDS ON NORTH-SOUTH
ORIENTED RUNWAYS. FURTHER NORTH WIDESPREAD SHOWERS AND TSTORMS
LIKELY ACROSS THE SOUTHERN GREAT BASIN MAINLY NORTH OF KLAS THROUGH
00Z. SHOWERS EXPAND ACROSS NORTHWEST ARIZONA AND FAR SOUTHERN NEVADA
AFTER 00Z AS A COLD FRONT MOVES THROUGH AND WINDS SHIFT TO THE
NORTHWEST.

 &&

.SPOTTER INFORMATION STATEMENT...SPOTTERS SHOULD REPORT ACCORDING TO
STANDARD OPERATING PROCEDURES.

&&

$$

SHORT TERM/AVIATION...OUTLER
LONG TERM...PADDOCK

FOR MORE FORECAST INFORMATION...SEE US ON OUR WEBPAGE:

HTTP://WEATHER.GOV/LASVEGAS OR FOLLOW US ON FACEBOOK AND TWITTER





000
FXUS65 KVEF 250858
AFDVEF

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
200 AM PDT FRI APR 24 2015

.SYNOPSIS...COOL AND UNSETTLED WEATHER IS EXPECTED TODAY AS A STRONG
TROUGH MOVES THROUGH THE AREA. SHOWERS AND THUNDERSTORMS CAN BE
EXPECTED ACROSS THE SOUTHERN GREAT BASIN AND MOHAVE COUNTY WITH
SCATTERED TO ISOLATED SHOWER AND THUNDERSTORMS POSSIBLE ELSEWHERE.
VERY STRONG WINDS ARE ANTICIPATED ACROSS THE WESTERN MOJAVE DESERT
CREATING AREAS OF BLOWING DUST AND HAZE. IMPROVING CONDITIONS ARE
EXPECTED SUNDAY WITH A WARMING TREND COMMENCING DURING THE WORKWEEK.
&&

.SHORT TERM...THROUGH SATURDAY NIGHT.

VIGOROUS SHORTWAVE CURRENTLY MOVING THROUGH NORTHERN CALIFORNIA
WILL BE THE MAIN PLAYER IN OUR WEATHER TODAY BRINGING AREAS OF HIGH
WINDS AND SHOWER POTENTIAL.  SHOWERS WILL BE ON THE INCREASE DURING
THE DAY ACROSS THE SOUTHERN GREAT BASIN AND ESPECIALLY LINCOLN
COUNTY WHERE A WETTING RAIN IS LIKELY.  SOME THUNDERSTORM ACTIVITY
IS EXPECTED AS WELL AS MARGINAL INSTABILITY WILL BE IN PLACE IN
COMBINATION WITH STRONG FRONTOGENTIC FORCING.

MEANWHILE ACROSS THE WESTERN MOJAVE DESERT...STRONG WINDS WILL
CONTINUE TO BLOW EARLY SATURDAY BEFORE INTENSIFYING BY MID-MORNING.
WIND GUSTS EXCEEDING 60 MPH ARE LIKELY ACROSS MUCH OF THE WESTERN
DESERTS BY SATURDAY AFTERNOON WITH LOCALIZED GUSTS TO 70 MPH
POSSIBLE.  THIS MAGNITUDE OF WIND CAN CAUSE STRUCTURAL DAMAGE AND
MAKE FOR DANGEROUS DRIVING AND FLYING CONDITIONS IN THE AREA DUE TO
STRONG CROSS WINDS AND AREAS OF BLOWING DUST.  WINDY CONDITIONS WILL
EXTEND EAST ACROSS MOST OF SAN BERNARDINO COUNTY...SOUTHERN CLARK
COUNTY...AND MOHAVE COUNTY BUT WILL BE LESS SEVERE THAN ACROSS THE
FAR WESTERN DESERT.

BY LATE IN THE AFTERNOON A STRONG COLD FRONT WILL PUSH SOUTH ACROSS
THE REGION...SOME SHOWERS AND ISOLATED THUNDERSTORMS WILL BE
POSSIBLE AS THIS MOVES THROUGH EVEN ACROSS THE DESERT VALLEYS. BEST
CHANCE FOR SHOWERS IN THE LAS VEGAS VALLEY WILL BE IN THE 5PM TO
10PM TIME FRAME AS THE COLD FRONT PUSHES THROUGH THE AREA.

BY LATE SATURDAY EVENING THE TROUGH WILL SHIFT EASTWARD INTO ARIZONA
WITH PRECIPITATION BECOMING LIMITED TO MOHAVE COUNTY. WINDS ACROSS
THE WESTERN MOJAVE WILL GRADUALLY EASE BUT GUSTY CONDITIONS MAY
LINGER INTO THE EARLY MORNING HOURS.

.LONG TERM...SUNDAY MORNING THROUGH FRIDAY.

AT THE START OF THE LONG TERM PERIOD, OUR DEEP TROUGH THAT IS
PROVIDING THE SHOWER CHANCES AND WINDY CONDITIONS WILL BE JUST EAST
OF THE NEVADA-UTAH BORDER AND CONTINUE TO PUSH EAST. ANY SHOWERS
WOULD BE OVER EXTREME EASTERN LINCOLN COUNTY AND EASTERN MOHAVE
COUNTY EARLY IN THE DAY BEFORE DRY CONDITIONS SET IN. EXPECT GUSTY
NORTH WINDS OF 20-30 MPH ACROSS MUCH OF THE AREA, WITH HIGHER WIND
SPEEDS LIKELY ALONG THE COLORADO RIVER VALLEY. WILL KEEP AN EYE ON
THE POTENTIAL FOR A WIND HEADLINE FOR THE RIVER ZONES. BREEZY NORTH
WINDS WILL LINGER INTO MONDAY, YET LIGHTER THAN SUNDAY. STRONGEST
GUSTS WILL REMAIN ALONG THE COLORADO RIVER VALLEY. SUNDAY AFTERNOON
TEMPERATURES WILL CONTINUE TO RUN BELOW NORMAL FOR THIS TIME OF
YEAR, THEN TREND NEAR NORMAL FOR MONDAY.

WINDS WILL BE WEAKER AND TREND TOWARD TYPICAL DIURNAL DIRECTIONS
TUESDAY AND WEDNESDAY AS HIGH PRESSURE FULLY TAKES CONTROL.
TEMPERATURES WILL ALSO TREND MUCH WARMER THROUGH THE WEEK, WITH
AFTERNOON HIGHS CLIMBING ROUGHLY 10 DEGREES ABOVE NORMAL FOR THE
LATTER HALF OF THE WEEK. THERE REMAINS SOME DIFFERENCE IN STRENGTH
AND TIMING, BUT MODELS CONTINUE TO INDICATE A LOW PRESSURE SYSTEM
MOVING THROUGH THE PACIFIC NORTHWEST /PERHAPS NORTHERN CALIFORNIA/
LATE THURSDAY THROUGH FRIDAY. SOME BREEZY SOUTHWEST WINDS ARE
POSSIBLE THURSDAY AFTERNOON AND AGAIN FRIDAY. BREEZY CONDITIONS MAY
LAST INTO THE WEEKEND, AS SOME WEAK TROUGHING LINGERS ACROSS THE
GREAT BASIN. FOR NOW, IT APPEARS ANY MOISTURE WITH THIS TROUGH IS
EXTREMELY LIMITED AND SHOULD STAY NORTH OF THE FORECAST AREA.

&&

.AVIATION...FOR MCCARRAN...GUSTY SOUTH WINDS EXPECTED AGAIN TODAY
WITH SUSTAINED WINDS OF 15-25KTS EXPECTED AFTER 15Z WITH GUSTS AS
HIGH AS 35 KTS. SCT-BKN CLOUDS EXPECTED MUCH OF THE DAY WITH A COLD
FRONT EXPECTED TO MOVE THROUGH IN THE LATE AFTERNOON BETWEEN 00Z-04Z
RESULTING IN A WIND SHIFT TO NORTHWESTERLY WINDS OF 15 TO 20KTS
BEFORE GRADUALLY EASING SATURDAY NIGHT. SHOWERS POSSIBLE AT THE
AIRFIELD BETWEEN 23Z AND 04Z WITH CIGS AROUND 8K EXPECTED.
IMPROVEMENT IN SKY CONDITIONS EXPECTED AFTER 4Z.

.FOR THE REST OF SOUTHERN NEVADA...NORTHWEST ARIZONA...AND SOUTHEAST
CALIFORNIA...UNSETTLED WEATHER EXPECTED ACROSS THE REGION TODAY WITH
STRONG AND GUSTY WEST-SOUTHWEST WINDS EXPECTED ACROSS THE MOJAVE
DESERT EASTWARD INTO NORTHWEST ARIZONA. WINDS OF 20 TO 30 KTS WITH
GUSTS TO 40 EXPECTED WITH EVEN STRONGER WINDS IN THE KDAG AREA AND
FAR WESTERN MOJAVE DESERT WHERE GUSTS WILL EXCEED 50KTS. AREAS OF
BLOWING DUST LIKELY WITH DANGEROUS CROSSWINDS ON NORTH-SOUTH
ORIENTED RUNWAYS. FURTHER NORTH WIDESPREAD SHOWERS AND TSTORMS
LIKELY ACROSS THE SOUTHERN GREAT BASIN MAINLY NORTH OF KLAS THROUGH
00Z. SHOWERS EXPAND ACROSS NORTHWEST ARIZONA AND FAR SOUTHERN NEVADA
AFTER 00Z AS A COLD FRONT MOVES THROUGH AND WINDS SHIFT TO THE
NORTHWEST.

 &&

.SPOTTER INFORMATION STATEMENT...SPOTTERS SHOULD REPORT ACCORDING TO
STANDARD OPERATING PROCEDURES.

&&

$$

SHORT TERM/AVIATION...OUTLER
LONG TERM...PADDOCK

FOR MORE FORECAST INFORMATION...SEE US ON OUR WEBPAGE:

HTTP://WEATHER.GOV/LASVEGAS OR FOLLOW US ON FACEBOOK AND TWITTER




000
FXUS65 KVEF 250343
AFDVEF

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
845 PM PDT FRI APR 24 2015

.SYNOPSIS...UNSETTLED WEATHER WILL CONTINUE THROUGH SATURDAY NIGHT
WITH AREAS OF SHOWERS AND THUNDERSTORMS ALONG WITH GUSTY WINDS AND
COOLER TEMPERATURES. GREATEST CHANCES FOR RAINFALL ARE EXPECTED
ACROSS THE SOUTHERN GREAT BASIN AND NORTHWEST ARIZONA. IN
ADDITION...STRONG WINDS WILL DEVELOP ACROSS THE WESTERN MOJAVE
DESERT FRIDAY AND BECOME QUITE STRONG ON SATURDAY RESULTING IN AREAS
OF BLOWING DUST. WARMER AND DRIER CONDITIONS ARE EXPECTED NEXT WEEK.
&&

.UPDATE...MAIN SHORT TERM CONCERN IS WINDS ACROSS THE WESTERN MOJAVE
DESERT AND THE SOUTHWARD DEVELOPMENT OF PRECIP ACROSS LINCOLN COUNTY
AND NORTHERN CLARK COUNTY.  WINDS THIS EVENING HAVE COME DOWN
SOMEWHAT NEAR DAGGETT AND BICYCLE LAKE WHERE GUSTS IN THE PAST HOUR
HAVE BEEN BELOW 40 MPH FOR BOTH LOCATIONS WITH IMPROVING
VISIBILITIES. I EXPECT THIS LULL TO CONTINUE MOST OF THE NIGHT BUT
IT WILL REMAIN GUSTY BEFORE REALLY PICKING UP AGAIN BY MID MORNING
SATURDAY. THE HIGH WIND WARNING FOR THIS AREA LOOKS GOOD.

FURTHER WEST...NICE ARCING CLOUD BAND EXTENDS FROM LINCOLN COUNTY
ALL THE WAY DOWN TO THE WESTERN MOJAVE DESERT WITH OGRANIZED SHOWER
ACTIVITY EVIDENT ON RADAR FROM SOUTHERN LINCOLN COUNTY INTO NORTHERN
CLARK COUNTY. I DO BELIEVE THIS WILL REMAIN NORTH OF THE LAS VEGAS
VALLEY AND LATEST HRRR GUIDANCE SUPPORTS THIS BUT YOU WONT HAVE TO
GO FAR TO OBSERVE SHOWER ACTIVITY WITH REASONABLY HIGH PROBABILITIES
FOR SHOWERS FROM MOAPA AND MESQUITE NORTHWARDS INTO LINCOLN COUNTY.

IVE MADE SOME ADJUSTMENTS TO THE POP FORECAST MAINLY TO ACCOUNT FOR
CURRENT AND ANTICIPATED RAINFALL TRENDS AND ADJUSTED THE CLOUD
COVER. OTHERWISE THE FORECAST IS IN GOOD SHAPE.

-OUTLER-

.SHORT TERM...THROUGH SATURDAY NIGHT.

SHOWER AND THUNDERSTORM ACTIVITY HAS BEEN FAIRLY ISOLATED THIS
AFTERNOON WITH MOST ACTIVITY OCCURRING OVER PORTIONS OF LINCOLN AND
EASTERN CLARK COUNTIES. DRIER AND A BIT MORE STABLE AIR WAS WORKING
IN FROM THE WEST BEHIND A WEAK SHORTWAVE THAT IS CURRENTLY PUSHING
THROUGH THE FAR EASTERN AREAS OF THE GREAT BASIN. ALONG WITH THIS
DRIER AIR ARE STRONG WINDS THAT HAVE BEEN BLOWING ACROSS PORTIONS OF
THE WESTERN MOJAVE DESERT. THERE HAVE BEEN A FEW PLACES THAT HAVE
GUSTED OVER 50 MPH WITH BICYCLE LAKE JUST REACHING 58 MPH WITHIN THE
PAST HOUR. THESE STRONG WINDS WILL CONTINUE INTO THIS EVENING...BUT
ARE EXPECTED TO LULL A BIT OVERNIGHT BEFORE INCREASING ONCE AGAIN
SATURDAY. CURRENTLY WE HAVE WIND ADVISORIES IN PLACE FOR THE WESTERN
MOJAVE DESERT THROUGH SATURDAY...BUT THAT ADVISORY MAY NEED TO BE
UPGRADED TO A WARNING OVERNIGHT AS WINDS MAY GUST AS HIGH AS 60 MPH
SATURDAY.

WITH THE NEXT TROUGH MOVING INTO THE REGION PRECIPITATION
IS EXPECTED TO INCREASE LATE SATURDAY MORNING OVER THE FAR NORTHERN
AREAS OF THE CWA AHEAD OF A FAIRLY STRONG COLD FRONT THAT WILL MOVE
THROUGH THE AREA. SHOWERS AND THUNDERSTORMS ARE EXPECTED TO DEVELOP
AHEAD AND JUST BEHIND THE FRONT WITH THE MOST WIDESPREAD AREAS OF
PRECIPITATION OCCURRING OVER ESMERALDA...CENTRAL NYE AND LINCOLN
COUNTIES SATURDAY AFTERNOON. AS THE FRONT TRACKS SOUTH SATURDAY
EVENING...PRECIPITATION IS EXPECTED TO INCREASE OVER CLARK AND
MOHAVE COUNTIES WITH MOSTLY ISOLATED TO SCATTERED SHOWERS OVER
MOHAVE CLARK COUNTY WITH MORE WIDESPREAD PRECIPITATION OVER MOHAVE
COUNTY. WINDS AHEAD OF THE FRONT ARE EXPECTED TO INCREASE ACROSS
EASTERN SAN BERNARDINO...SOUTHERN CLARK AND MOHAVE COUNTIES SATURDAY
AFTERNOON AND HAVE GONE AHEAD AND ISSUED A WIND ADVISORY FOR THOSE
AREAS INTO SATURDAY EVENING. THE FRONT IS EXPECTED TO EXIT FAIRLY
QUICKLY LATE SATURDAY NIGHT WITH MOST OF THE PRECIPITATION ENDING BY
SUNDAY MORNING LEAVING GUSTY NORTH WINDS ACROSS THE REGION.

OUTSIDE OF A FEW LIGHT SHOWERS OVER THE FAR EASTERN AREAS OF THE CWA
SUNDAY...CONDITIONS ARE EXPECTED TO REMAIN DRY. THE STRONGEST WINDS
WILL OCCUR DOWN THE COLORADO RIVER AND ADVISORIES WILL BE POSSIBLE.
COOLER TEMPERATURES EXPECTED SATURDAY WITH READINGS DOWN ABOUT 5-7
DEGREES WITH A SLIGHT WARMING TREND SUNDAY.

.LONG TERM...MONDAY MORNING THROUGH FRIDAY.

A RIDGE OF HIGH PRESSURE WILL BEGIN TO BUILD INTO THE AREA ON
MONDAY...BUT NORTHERLY WINDS...PARTICULARLY DOWN THE COLORADO RIVER
VALLEY WILL PERSIST FOR ONE MORE DAY...ALTHOUGH THE WINDS WILL BE
LIGHTER THAN ON SUNDAY. TEMPERATURES WILL RECOVER TO AROUND THE
SEASONAL NORMS ON MONDAY AFTERNOON...WHICH IS THE LOW 80S IN LAS
VEGAS. THE AREA OF HIGH PRESSURE WILL BE CENTERED OVER THE AREA ON
TUESDAY AND WILL SHIFT SLOWLY TO THE EAST DURING THE DAY ON
WEDNESDAY. HIGH TEMPERATURES WILL CONTINUE TO TREND UPWARD BOTH
DAYS...CLIMBING ON AVERAGE 10 DEGREES BETWEEN MONDAY AND WEDNESDAY.
THERE IS SOME DIFFERENCE IN THE STRENGTH AND EXACT TIMING...BUT THE
GFS...GEFS AND ECMWF HAVE A TROUGH OF LOW PRESSURE IN THE VICINITY
OF THE NORTHERN CALIFORNIA COAST ON THURSDAY AND FRIDAY. THIS WILL
PROVIDE SOME INCREASE IN WINDS...PARTICULARLY NORTH OF LAS VEGAS BY
THURSDAY AFTERNOON. AT THIS POINT...THE MAIN WEATHER ISSUE WITH THE
TROUGH LOOKS TO BE WINDS WITH MOISTURE BEING LIMITED AND WELL NORTH
OF OUR AREA.
&&

.AVIATION...FOR MCCARRAN...SOUTH TO SOUTHWEST WINDS BETWEEN 15-25
KTS WITH OCCASIONAL GUSTS TO 30 KTS EXPECTED INTO THIS EVENING...BUT
WILL GRADUALLY DIMINISH AFTER 06Z TO AROUND 10-15 KTS. WINDS ARE
EXPECTED TO INCREASE ONCE AGAIN LATE SATURDAY MORNING WITH WINDS
BETWEEN 20-30 KTS AND GUSTS UP TO 35 KTS AT TIMES. SCATTERED SHOWERS
AND ISOLATED THUNDERSTORMS WILL DEVELOP DURING THE AFTERNOON WITH
MOST REMAINING OVER THE MOUNTAINS...HOWEVER ITS POSSIBLE THAT THEY
MAY DEVELOP IN THE VALLEY BETWEEN 22Z-04Z. CIGS ARE EXPECTED TO
REMAIN ABOVE 8K FEET BUT MAY LOWER TO AROUND 6K FEET NEAR ANY
SHOWERS.

.FOR THE REST OF SOUTHERN NEVADA...NORTHWEST ARIZONA...AND SOUTHEAST
CALIFORNIA...STRONG WEST WINDS WILL OCCUR OVER WESTERN SAN
BERNARDINO COUNTY WHERE GUST TO 55 MPH ARE POSSIBLE INTO THIS
EVENING. ELSEWHERE SOUTHWEST WINDS GUSTING TO 30 MPH WILL GRADUALLY
DIMINISH THIS EVENING WITH MOST LOCATIONS SEEING WINDS LESS THAN 15
KTS. ISOLATED SHOWERS AND THUNDERSTORMS WILL OCCUR THIS EVENING OVER
MAINLY LINCOLN AND MOHAVE COUNTIES. GUSTY SOUTHWEST TO WEST WINDS
WILL OCCUR OVER SOUTHERN PORTIONS OF THE AREA. PRECIPITATION IS
EXPECTED TO INCREASE OVER ESMERALDA...CENTRAL NYE AND LINCOLN
COUNTIES WITH WIDESPREAD SHOWERS AND THUNDERSTORMS ARE EXPECTED LATE
SATURDAY AFTERNOON AND EVENING. SCATTERED SHOWERS AND THUNDERSTORMS
EXPECTED ELSEWHERE. CIGS MAY LOWER TO AROUND 5-6K FEET AT TIMES NEAR
ANY RAINFALL.
&&

.SPOTTER INFORMATION STATEMENT...SPOTTERS SHOULD REPORT ACCORDING TO
STANDARD OPERATING PROCEDURES.
&&

$$

SHORT TERM/AVIATION...GORELOW
LONG TERM...CZYZYK

FOR MORE FORECAST INFORMATION...SEE US ON OUR WEBPAGE:

HTTP://WEATHER.GOV/LASVEGAS OR FOLLOW US ON FACEBOOK AND TWITTER




000
FXUS65 KVEF 250343
AFDVEF

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
845 PM PDT FRI APR 24 2015

.SYNOPSIS...UNSETTLED WEATHER WILL CONTINUE THROUGH SATURDAY NIGHT
WITH AREAS OF SHOWERS AND THUNDERSTORMS ALONG WITH GUSTY WINDS AND
COOLER TEMPERATURES. GREATEST CHANCES FOR RAINFALL ARE EXPECTED
ACROSS THE SOUTHERN GREAT BASIN AND NORTHWEST ARIZONA. IN
ADDITION...STRONG WINDS WILL DEVELOP ACROSS THE WESTERN MOJAVE
DESERT FRIDAY AND BECOME QUITE STRONG ON SATURDAY RESULTING IN AREAS
OF BLOWING DUST. WARMER AND DRIER CONDITIONS ARE EXPECTED NEXT WEEK.
&&

.UPDATE...MAIN SHORT TERM CONCERN IS WINDS ACROSS THE WESTERN MOJAVE
DESERT AND THE SOUTHWARD DEVELOPMENT OF PRECIP ACROSS LINCOLN COUNTY
AND NORTHERN CLARK COUNTY.  WINDS THIS EVENING HAVE COME DOWN
SOMEWHAT NEAR DAGGETT AND BICYCLE LAKE WHERE GUSTS IN THE PAST HOUR
HAVE BEEN BELOW 40 MPH FOR BOTH LOCATIONS WITH IMPROVING
VISIBILITIES. I EXPECT THIS LULL TO CONTINUE MOST OF THE NIGHT BUT
IT WILL REMAIN GUSTY BEFORE REALLY PICKING UP AGAIN BY MID MORNING
SATURDAY. THE HIGH WIND WARNING FOR THIS AREA LOOKS GOOD.

FURTHER WEST...NICE ARCING CLOUD BAND EXTENDS FROM LINCOLN COUNTY
ALL THE WAY DOWN TO THE WESTERN MOJAVE DESERT WITH OGRANIZED SHOWER
ACTIVITY EVIDENT ON RADAR FROM SOUTHERN LINCOLN COUNTY INTO NORTHERN
CLARK COUNTY. I DO BELIEVE THIS WILL REMAIN NORTH OF THE LAS VEGAS
VALLEY AND LATEST HRRR GUIDANCE SUPPORTS THIS BUT YOU WONT HAVE TO
GO FAR TO OBSERVE SHOWER ACTIVITY WITH REASONABLY HIGH PROBABILITIES
FOR SHOWERS FROM MOAPA AND MESQUITE NORTHWARDS INTO LINCOLN COUNTY.

IVE MADE SOME ADJUSTMENTS TO THE POP FORECAST MAINLY TO ACCOUNT FOR
CURRENT AND ANTICIPATED RAINFALL TRENDS AND ADJUSTED THE CLOUD
COVER. OTHERWISE THE FORECAST IS IN GOOD SHAPE.

-OUTLER-

.SHORT TERM...THROUGH SATURDAY NIGHT.

SHOWER AND THUNDERSTORM ACTIVITY HAS BEEN FAIRLY ISOLATED THIS
AFTERNOON WITH MOST ACTIVITY OCCURRING OVER PORTIONS OF LINCOLN AND
EASTERN CLARK COUNTIES. DRIER AND A BIT MORE STABLE AIR WAS WORKING
IN FROM THE WEST BEHIND A WEAK SHORTWAVE THAT IS CURRENTLY PUSHING
THROUGH THE FAR EASTERN AREAS OF THE GREAT BASIN. ALONG WITH THIS
DRIER AIR ARE STRONG WINDS THAT HAVE BEEN BLOWING ACROSS PORTIONS OF
THE WESTERN MOJAVE DESERT. THERE HAVE BEEN A FEW PLACES THAT HAVE
GUSTED OVER 50 MPH WITH BICYCLE LAKE JUST REACHING 58 MPH WITHIN THE
PAST HOUR. THESE STRONG WINDS WILL CONTINUE INTO THIS EVENING...BUT
ARE EXPECTED TO LULL A BIT OVERNIGHT BEFORE INCREASING ONCE AGAIN
SATURDAY. CURRENTLY WE HAVE WIND ADVISORIES IN PLACE FOR THE WESTERN
MOJAVE DESERT THROUGH SATURDAY...BUT THAT ADVISORY MAY NEED TO BE
UPGRADED TO A WARNING OVERNIGHT AS WINDS MAY GUST AS HIGH AS 60 MPH
SATURDAY.

WITH THE NEXT TROUGH MOVING INTO THE REGION PRECIPITATION
IS EXPECTED TO INCREASE LATE SATURDAY MORNING OVER THE FAR NORTHERN
AREAS OF THE CWA AHEAD OF A FAIRLY STRONG COLD FRONT THAT WILL MOVE
THROUGH THE AREA. SHOWERS AND THUNDERSTORMS ARE EXPECTED TO DEVELOP
AHEAD AND JUST BEHIND THE FRONT WITH THE MOST WIDESPREAD AREAS OF
PRECIPITATION OCCURRING OVER ESMERALDA...CENTRAL NYE AND LINCOLN
COUNTIES SATURDAY AFTERNOON. AS THE FRONT TRACKS SOUTH SATURDAY
EVENING...PRECIPITATION IS EXPECTED TO INCREASE OVER CLARK AND
MOHAVE COUNTIES WITH MOSTLY ISOLATED TO SCATTERED SHOWERS OVER
MOHAVE CLARK COUNTY WITH MORE WIDESPREAD PRECIPITATION OVER MOHAVE
COUNTY. WINDS AHEAD OF THE FRONT ARE EXPECTED TO INCREASE ACROSS
EASTERN SAN BERNARDINO...SOUTHERN CLARK AND MOHAVE COUNTIES SATURDAY
AFTERNOON AND HAVE GONE AHEAD AND ISSUED A WIND ADVISORY FOR THOSE
AREAS INTO SATURDAY EVENING. THE FRONT IS EXPECTED TO EXIT FAIRLY
QUICKLY LATE SATURDAY NIGHT WITH MOST OF THE PRECIPITATION ENDING BY
SUNDAY MORNING LEAVING GUSTY NORTH WINDS ACROSS THE REGION.

OUTSIDE OF A FEW LIGHT SHOWERS OVER THE FAR EASTERN AREAS OF THE CWA
SUNDAY...CONDITIONS ARE EXPECTED TO REMAIN DRY. THE STRONGEST WINDS
WILL OCCUR DOWN THE COLORADO RIVER AND ADVISORIES WILL BE POSSIBLE.
COOLER TEMPERATURES EXPECTED SATURDAY WITH READINGS DOWN ABOUT 5-7
DEGREES WITH A SLIGHT WARMING TREND SUNDAY.

.LONG TERM...MONDAY MORNING THROUGH FRIDAY.

A RIDGE OF HIGH PRESSURE WILL BEGIN TO BUILD INTO THE AREA ON
MONDAY...BUT NORTHERLY WINDS...PARTICULARLY DOWN THE COLORADO RIVER
VALLEY WILL PERSIST FOR ONE MORE DAY...ALTHOUGH THE WINDS WILL BE
LIGHTER THAN ON SUNDAY. TEMPERATURES WILL RECOVER TO AROUND THE
SEASONAL NORMS ON MONDAY AFTERNOON...WHICH IS THE LOW 80S IN LAS
VEGAS. THE AREA OF HIGH PRESSURE WILL BE CENTERED OVER THE AREA ON
TUESDAY AND WILL SHIFT SLOWLY TO THE EAST DURING THE DAY ON
WEDNESDAY. HIGH TEMPERATURES WILL CONTINUE TO TREND UPWARD BOTH
DAYS...CLIMBING ON AVERAGE 10 DEGREES BETWEEN MONDAY AND WEDNESDAY.
THERE IS SOME DIFFERENCE IN THE STRENGTH AND EXACT TIMING...BUT THE
GFS...GEFS AND ECMWF HAVE A TROUGH OF LOW PRESSURE IN THE VICINITY
OF THE NORTHERN CALIFORNIA COAST ON THURSDAY AND FRIDAY. THIS WILL
PROVIDE SOME INCREASE IN WINDS...PARTICULARLY NORTH OF LAS VEGAS BY
THURSDAY AFTERNOON. AT THIS POINT...THE MAIN WEATHER ISSUE WITH THE
TROUGH LOOKS TO BE WINDS WITH MOISTURE BEING LIMITED AND WELL NORTH
OF OUR AREA.
&&

.AVIATION...FOR MCCARRAN...SOUTH TO SOUTHWEST WINDS BETWEEN 15-25
KTS WITH OCCASIONAL GUSTS TO 30 KTS EXPECTED INTO THIS EVENING...BUT
WILL GRADUALLY DIMINISH AFTER 06Z TO AROUND 10-15 KTS. WINDS ARE
EXPECTED TO INCREASE ONCE AGAIN LATE SATURDAY MORNING WITH WINDS
BETWEEN 20-30 KTS AND GUSTS UP TO 35 KTS AT TIMES. SCATTERED SHOWERS
AND ISOLATED THUNDERSTORMS WILL DEVELOP DURING THE AFTERNOON WITH
MOST REMAINING OVER THE MOUNTAINS...HOWEVER ITS POSSIBLE THAT THEY
MAY DEVELOP IN THE VALLEY BETWEEN 22Z-04Z. CIGS ARE EXPECTED TO
REMAIN ABOVE 8K FEET BUT MAY LOWER TO AROUND 6K FEET NEAR ANY
SHOWERS.

.FOR THE REST OF SOUTHERN NEVADA...NORTHWEST ARIZONA...AND SOUTHEAST
CALIFORNIA...STRONG WEST WINDS WILL OCCUR OVER WESTERN SAN
BERNARDINO COUNTY WHERE GUST TO 55 MPH ARE POSSIBLE INTO THIS
EVENING. ELSEWHERE SOUTHWEST WINDS GUSTING TO 30 MPH WILL GRADUALLY
DIMINISH THIS EVENING WITH MOST LOCATIONS SEEING WINDS LESS THAN 15
KTS. ISOLATED SHOWERS AND THUNDERSTORMS WILL OCCUR THIS EVENING OVER
MAINLY LINCOLN AND MOHAVE COUNTIES. GUSTY SOUTHWEST TO WEST WINDS
WILL OCCUR OVER SOUTHERN PORTIONS OF THE AREA. PRECIPITATION IS
EXPECTED TO INCREASE OVER ESMERALDA...CENTRAL NYE AND LINCOLN
COUNTIES WITH WIDESPREAD SHOWERS AND THUNDERSTORMS ARE EXPECTED LATE
SATURDAY AFTERNOON AND EVENING. SCATTERED SHOWERS AND THUNDERSTORMS
EXPECTED ELSEWHERE. CIGS MAY LOWER TO AROUND 5-6K FEET AT TIMES NEAR
ANY RAINFALL.
&&

.SPOTTER INFORMATION STATEMENT...SPOTTERS SHOULD REPORT ACCORDING TO
STANDARD OPERATING PROCEDURES.
&&

$$

SHORT TERM/AVIATION...GORELOW
LONG TERM...CZYZYK

FOR MORE FORECAST INFORMATION...SEE US ON OUR WEBPAGE:

HTTP://WEATHER.GOV/LASVEGAS OR FOLLOW US ON FACEBOOK AND TWITTER





000
FXUS65 KVEF 242238
AFDVEF

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
338 PM PDT FRI APR 24 2015

.SYNOPSIS...UNSETTLED WEATHER WILL CONTINUE THROUGH SATURDAY NIGHT
WITH AREAS OF SHOWERS AND THUNDERSTORMS ALONG WITH GUSTY WINDS AND
COOLER TEMPERATURES. GREATEST CHANCES FOR RAINFALL ARE EXPECTED
ACROSS THE SOUTHERN GREAT BASIN AND NORTHWEST ARIZONA. IN
ADDITION...STRONG WINDS WILL DEVELOP ACROSS THE WESTERN MOJAVE
DESERT FRIDAY AND BECOME QUITE STRONG ON SATURDAY RESULTING IN AREAS
OF BLOWING DUST. WARMER AND DRIER CONDITIONS ARE EXPECTED NEXT WEEK.
&&

.SHORT TERM...THROUGH SATURDAY NIGHT.

SHOWER AND THUNDERSTORM ACTIVITY HAS BEEN FAIRLY ISOLATED THIS
AFTERNOON WITH MOST ACTIVITY OCCURRING OVER PORTIONS OF LINCOLN AND
EASTERN CLARK COUNTIES. DRIER AND A BIT MORE STABLE AIR WAS WORKING
IN FROM THE WEST BEHIND A WEAK SHORTWAVE THAT IS CURRENTLY PUSHING
THROUGH THE FAR EASTERN AREAS OF THE GREAT BASIN. ALONG WITH THIS
DRIER AIR ARE STRONG WINDS THAT HAVE BEEN BLOWING ACROSS PORTIONS OF
THE WESTERN MOJAVE DESERT. THERE HAVE BEEN A FEW PLACES THAT HAVE
GUSTED OVER 50 MPH WITH BICYCLE LAKE JUST REACHING 58 MPH WITHIN THE
PAST HOUR. THESE STRONG WINDS WILL CONTINUE INTO THIS EVENING...BUT
ARE EXPECTED TO LULL A BIT OVERNIGHT BEFORE INCREASING ONCE AGAIN
SATURDAY. CURRENTLY WE HAVE WIND ADVISORIES IN PLACE FOR THE WESTERN
MOJAVE DESERT THROUGH SATURDAY...BUT THAT ADVISORY MAY NEED TO BE
UPGRADED TO A WARNING OVERNIGHT AS WINDS MAY GUST AS HIGH AS 60 MPH
SATURDAY.

WITH THE NEXT TROUGH MOVING INTO THE REGION PRECIPITATION
IS EXPECTED TO INCREASE LATE SATURDAY MORNING OVER THE FAR NORTHERN
AREAS OF THE CWA AHEAD OF A FAIRLY STRONG COLD FRONT THAT WILL MOVE
THROUGH THE AREA. SHOWERS AND THUNDERSTORMS ARE EXPECTED TO DEVELOP
AHEAD AND JUST BEHIND THE FRONT WITH THE MOST WIDESPREAD AREAS OF
PRECIPITATION OCCURRING OVER ESMERALDA...CENTRAL NYE AND LINCOLN
COUNTIES SATURDAY AFTERNOON. AS THE FRONT TRACKS SOUTH SATURDAY
EVENING...PRECIPITATION IS EXPECTED TO INCREASE OVER CLARK AND
MOHAVE COUNTIES WITH MOSTLY ISOLATED TO SCATTERED SHOWERS OVER
MOHAVE CLARK COUNTY WITH MORE WIDESPREAD PRECIPITATION OVER MOHAVE
COUNTY. WINDS AHEAD OF THE FRONT ARE EXPECTED TO INCREASE ACROSS
EASTERN SAN BERNARDINO...SOUTHERN CLARK AND MOHAVE COUNTIES SATURDAY
AFTERNOON AND HAVE GONE AHEAD AND ISSUED A WIND ADVISORY FOR THOSE
AREAS INTO SATURDAY EVENING. THE FRONT IS EXPECTED TO EXIT FAIRLY
QUICKLY LATE SATURDAY NIGHT WITH MOST OF THE PRECIPITATION ENDING BY
SUNDAY MORNING LEAVING GUSTY NORTH WINDS ACROSS THE REGION.

OUTSIDE OF A FEW LIGHT SHOWERS OVER THE FAR EASTERN AREAS OF THE CWA
SUNDAY...CONDITIONS ARE EXPECTED TO REMAIN DRY. THE STRONGEST WINDS
WILL OCCUR DOWN THE COLORADO RIVER AND ADVISORIES WILL BE POSSIBLE.
COOLER TEMPERATURES EXPECTED SATURDAY WITH READINGS DOWN ABOUT 5-7
DEGREES WITH A SLIGHT WARMING TREND SUNDAY.

.LONG TERM...MONDAY MORNING THROUGH FRIDAY.

A RIDGE OF HIGH PRESSURE WILL BEGIN TO BUILD INTO THE AREA ON
MONDAY...BUT NORTHERLY WINDS...PARTICULARLY DOWN THE COLORADO RIVER
VALLEY WILL PERSIST FOR ONE MORE DAY...ALTHOUGH THE WINDS WILL BE
LIGHTER THAN ON SUNDAY. TEMPERATURES WILL RECOVER TO AROUND THE
SEASONAL NORMS ON MONDAY AFTERNOON...WHICH IS THE LOW 80S IN LAS
VEGAS. THE AREA OF HIGH PRESSURE WILL BE CENTERED OVER THE AREA ON
TUESDAY AND WILL SHIFT SLOWLY TO THE EAST DURING THE DAY ON
WEDNESDAY. HIGH TEMPERATURES WILL CONTINUE TO TREND UPWARD BOTH
DAYS...CLIMBING ON AVERAGE 10 DEGREES BETWEEN MONDAY AND WEDNESDAY.
THERE IS SOME DIFFERENCE IN THE STRENGTH AND EXACT TIMING...BUT THE
GFS...GEFS AND ECMWF HAVE A TROUGH OF LOW PRESSURE IN THE VICINITY
OF THE NORTHERN CALIFORNIA COAST ON THURSDAY AND FRIDAY. THIS WILL
PROVIDE SOME INCREASE IN WINDS...PARTICULARLY NORTH OF LAS VEGAS BY
THURSDAY AFTERNOON. AT THIS POINT...THE MAIN WEATHER ISSUE WITH THE
TROUGH LOOKS TO BE WINDS WITH MOISTURE BEING LIMITED AND WELL NORTH
OF OUR AREA.
&&

.AVIATION...FOR MCCARRAN...SOUTH TO SOUTHWEST WINDS BETWEEN 15-25
KTS WITH OCCASIONAL GUSTS TO 30 KTS EXPECTED INTO THIS EVENING...BUT
WILL GRADUALLY DIMINISH AFTER 06Z TO AROUND 10-15 KTS. WINDS ARE
EXPECTED TO INCREASE ONCE AGAIN LATE SATURDAY MORNING WITH WINDS
BETWEEN 20-30 KTS AND GUSTS UP TO 35 KTS AT TIMES. SCATTERED SHOWERS
AND ISOLATED THUNDERSTORMS WILL DEVELOP DURING THE AFTERNOON WITH
MOST REMAINING OVER THE MOUNTAINS...HOWEVER ITS POSSIBLE THAT THEY
MAY DEVELOP IN THE VALLEY BETWEEN 22Z-04Z. CIGS ARE EXPECTED TO
REMAIN ABOVE 8K FEET BUT MAY LOWER TO AROUND 6K FEET NEAR ANY
SHOWERS.

.FOR THE REST OF SOUTHERN NEVADA...NORTHWEST ARIZONA...AND SOUTHEAST
CALIFORNIA...STRONG WEST WINDS WILL OCCUR OVER WESTERN SAN
BERNARDINO COUNTY WHERE GUST TO 55 MPH ARE POSSIBLE INTO THIS
EVENING. ELSEWHERE SOUTHWEST WINDS GUSTING TO 30 MPH WILL GRADUALLY
DIMINISH THIS EVENING WITH MOST LOCATIONS SEEING WINDS LESS THAN 15
KTS. ISOLATED SHOWERS AND THUNDERSTORMS WILL OCCUR THIS EVENING OVER
MAINLY LINCOLN AND MOHAVE COUNTIES. GUSTY SOUTHWEST TO WEST WINDS
WILL OCCUR OVER SOUTHERN PORTIONS OF THE AREA. PRECIPITATION IS
EXPECTED TO INCREASE OVER ESMERALDA...CENTRAL NYE AND LINCOLN
COUNTIES WITH WIDESPREAD SHOWERS AND THUNDERSTORMS ARE EXPECTED LATE
SATURDAY AFTERNOON AND EVENING. SCATTERED SHOWERS AND THUNDERSTORMS
EXPECTED ELSEWHERE. CIGS MAY LOWER TO AROUND 5-6K FEET AT TIMES NEAR
ANY RAINFALL.
&&

.SPOTTER INFORMATION STATEMENT...SPOTTERS SHOULD REPORT ACCORDING TO
STANDARD OPERATING PROCEDURES.
&&

$$

SHORT TERM/AVIATION...GORELOW
LONG TERM...CZYZYK

FOR MORE FORECAST INFORMATION...SEE US ON OUR WEBPAGE:

HTTP://WEATHER.GOV/LASVEGAS OR FOLLOW US ON FACEBOOK AND TWITTER




000
FXUS65 KVEF 242238
AFDVEF

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
338 PM PDT FRI APR 24 2015

.SYNOPSIS...UNSETTLED WEATHER WILL CONTINUE THROUGH SATURDAY NIGHT
WITH AREAS OF SHOWERS AND THUNDERSTORMS ALONG WITH GUSTY WINDS AND
COOLER TEMPERATURES. GREATEST CHANCES FOR RAINFALL ARE EXPECTED
ACROSS THE SOUTHERN GREAT BASIN AND NORTHWEST ARIZONA. IN
ADDITION...STRONG WINDS WILL DEVELOP ACROSS THE WESTERN MOJAVE
DESERT FRIDAY AND BECOME QUITE STRONG ON SATURDAY RESULTING IN AREAS
OF BLOWING DUST. WARMER AND DRIER CONDITIONS ARE EXPECTED NEXT WEEK.
&&

.SHORT TERM...THROUGH SATURDAY NIGHT.

SHOWER AND THUNDERSTORM ACTIVITY HAS BEEN FAIRLY ISOLATED THIS
AFTERNOON WITH MOST ACTIVITY OCCURRING OVER PORTIONS OF LINCOLN AND
EASTERN CLARK COUNTIES. DRIER AND A BIT MORE STABLE AIR WAS WORKING
IN FROM THE WEST BEHIND A WEAK SHORTWAVE THAT IS CURRENTLY PUSHING
THROUGH THE FAR EASTERN AREAS OF THE GREAT BASIN. ALONG WITH THIS
DRIER AIR ARE STRONG WINDS THAT HAVE BEEN BLOWING ACROSS PORTIONS OF
THE WESTERN MOJAVE DESERT. THERE HAVE BEEN A FEW PLACES THAT HAVE
GUSTED OVER 50 MPH WITH BICYCLE LAKE JUST REACHING 58 MPH WITHIN THE
PAST HOUR. THESE STRONG WINDS WILL CONTINUE INTO THIS EVENING...BUT
ARE EXPECTED TO LULL A BIT OVERNIGHT BEFORE INCREASING ONCE AGAIN
SATURDAY. CURRENTLY WE HAVE WIND ADVISORIES IN PLACE FOR THE WESTERN
MOJAVE DESERT THROUGH SATURDAY...BUT THAT ADVISORY MAY NEED TO BE
UPGRADED TO A WARNING OVERNIGHT AS WINDS MAY GUST AS HIGH AS 60 MPH
SATURDAY.

WITH THE NEXT TROUGH MOVING INTO THE REGION PRECIPITATION
IS EXPECTED TO INCREASE LATE SATURDAY MORNING OVER THE FAR NORTHERN
AREAS OF THE CWA AHEAD OF A FAIRLY STRONG COLD FRONT THAT WILL MOVE
THROUGH THE AREA. SHOWERS AND THUNDERSTORMS ARE EXPECTED TO DEVELOP
AHEAD AND JUST BEHIND THE FRONT WITH THE MOST WIDESPREAD AREAS OF
PRECIPITATION OCCURRING OVER ESMERALDA...CENTRAL NYE AND LINCOLN
COUNTIES SATURDAY AFTERNOON. AS THE FRONT TRACKS SOUTH SATURDAY
EVENING...PRECIPITATION IS EXPECTED TO INCREASE OVER CLARK AND
MOHAVE COUNTIES WITH MOSTLY ISOLATED TO SCATTERED SHOWERS OVER
MOHAVE CLARK COUNTY WITH MORE WIDESPREAD PRECIPITATION OVER MOHAVE
COUNTY. WINDS AHEAD OF THE FRONT ARE EXPECTED TO INCREASE ACROSS
EASTERN SAN BERNARDINO...SOUTHERN CLARK AND MOHAVE COUNTIES SATURDAY
AFTERNOON AND HAVE GONE AHEAD AND ISSUED A WIND ADVISORY FOR THOSE
AREAS INTO SATURDAY EVENING. THE FRONT IS EXPECTED TO EXIT FAIRLY
QUICKLY LATE SATURDAY NIGHT WITH MOST OF THE PRECIPITATION ENDING BY
SUNDAY MORNING LEAVING GUSTY NORTH WINDS ACROSS THE REGION.

OUTSIDE OF A FEW LIGHT SHOWERS OVER THE FAR EASTERN AREAS OF THE CWA
SUNDAY...CONDITIONS ARE EXPECTED TO REMAIN DRY. THE STRONGEST WINDS
WILL OCCUR DOWN THE COLORADO RIVER AND ADVISORIES WILL BE POSSIBLE.
COOLER TEMPERATURES EXPECTED SATURDAY WITH READINGS DOWN ABOUT 5-7
DEGREES WITH A SLIGHT WARMING TREND SUNDAY.

.LONG TERM...MONDAY MORNING THROUGH FRIDAY.

A RIDGE OF HIGH PRESSURE WILL BEGIN TO BUILD INTO THE AREA ON
MONDAY...BUT NORTHERLY WINDS...PARTICULARLY DOWN THE COLORADO RIVER
VALLEY WILL PERSIST FOR ONE MORE DAY...ALTHOUGH THE WINDS WILL BE
LIGHTER THAN ON SUNDAY. TEMPERATURES WILL RECOVER TO AROUND THE
SEASONAL NORMS ON MONDAY AFTERNOON...WHICH IS THE LOW 80S IN LAS
VEGAS. THE AREA OF HIGH PRESSURE WILL BE CENTERED OVER THE AREA ON
TUESDAY AND WILL SHIFT SLOWLY TO THE EAST DURING THE DAY ON
WEDNESDAY. HIGH TEMPERATURES WILL CONTINUE TO TREND UPWARD BOTH
DAYS...CLIMBING ON AVERAGE 10 DEGREES BETWEEN MONDAY AND WEDNESDAY.
THERE IS SOME DIFFERENCE IN THE STRENGTH AND EXACT TIMING...BUT THE
GFS...GEFS AND ECMWF HAVE A TROUGH OF LOW PRESSURE IN THE VICINITY
OF THE NORTHERN CALIFORNIA COAST ON THURSDAY AND FRIDAY. THIS WILL
PROVIDE SOME INCREASE IN WINDS...PARTICULARLY NORTH OF LAS VEGAS BY
THURSDAY AFTERNOON. AT THIS POINT...THE MAIN WEATHER ISSUE WITH THE
TROUGH LOOKS TO BE WINDS WITH MOISTURE BEING LIMITED AND WELL NORTH
OF OUR AREA.
&&

.AVIATION...FOR MCCARRAN...SOUTH TO SOUTHWEST WINDS BETWEEN 15-25
KTS WITH OCCASIONAL GUSTS TO 30 KTS EXPECTED INTO THIS EVENING...BUT
WILL GRADUALLY DIMINISH AFTER 06Z TO AROUND 10-15 KTS. WINDS ARE
EXPECTED TO INCREASE ONCE AGAIN LATE SATURDAY MORNING WITH WINDS
BETWEEN 20-30 KTS AND GUSTS UP TO 35 KTS AT TIMES. SCATTERED SHOWERS
AND ISOLATED THUNDERSTORMS WILL DEVELOP DURING THE AFTERNOON WITH
MOST REMAINING OVER THE MOUNTAINS...HOWEVER ITS POSSIBLE THAT THEY
MAY DEVELOP IN THE VALLEY BETWEEN 22Z-04Z. CIGS ARE EXPECTED TO
REMAIN ABOVE 8K FEET BUT MAY LOWER TO AROUND 6K FEET NEAR ANY
SHOWERS.

.FOR THE REST OF SOUTHERN NEVADA...NORTHWEST ARIZONA...AND SOUTHEAST
CALIFORNIA...STRONG WEST WINDS WILL OCCUR OVER WESTERN SAN
BERNARDINO COUNTY WHERE GUST TO 55 MPH ARE POSSIBLE INTO THIS
EVENING. ELSEWHERE SOUTHWEST WINDS GUSTING TO 30 MPH WILL GRADUALLY
DIMINISH THIS EVENING WITH MOST LOCATIONS SEEING WINDS LESS THAN 15
KTS. ISOLATED SHOWERS AND THUNDERSTORMS WILL OCCUR THIS EVENING OVER
MAINLY LINCOLN AND MOHAVE COUNTIES. GUSTY SOUTHWEST TO WEST WINDS
WILL OCCUR OVER SOUTHERN PORTIONS OF THE AREA. PRECIPITATION IS
EXPECTED TO INCREASE OVER ESMERALDA...CENTRAL NYE AND LINCOLN
COUNTIES WITH WIDESPREAD SHOWERS AND THUNDERSTORMS ARE EXPECTED LATE
SATURDAY AFTERNOON AND EVENING. SCATTERED SHOWERS AND THUNDERSTORMS
EXPECTED ELSEWHERE. CIGS MAY LOWER TO AROUND 5-6K FEET AT TIMES NEAR
ANY RAINFALL.
&&

.SPOTTER INFORMATION STATEMENT...SPOTTERS SHOULD REPORT ACCORDING TO
STANDARD OPERATING PROCEDURES.
&&

$$

SHORT TERM/AVIATION...GORELOW
LONG TERM...CZYZYK

FOR MORE FORECAST INFORMATION...SEE US ON OUR WEBPAGE:

HTTP://WEATHER.GOV/LASVEGAS OR FOLLOW US ON FACEBOOK AND TWITTER





000
FXUS65 KVEF 241639 AAA
AFDVEF

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
938 AM PDT FRI APR 24 2015

.SYNOPSIS...UNSETTLED WEATHER WILL CONTINUE THROUGH SATURDAY WITH
COOL TEMPERATURES WITH SCATTERED SHOWERS AND THUNDERSTORMS IN THE
FORECAST. GREATEST CHANCES FOR RAINFALL ARE EXPECTED ACROSS THE
SOUTHERN GREAT BASIN AND NORTHWEST ARIZONA. IN ADDITION...STRONG
WINDS WILL DEVELOP ACROSS THE WESTERN MOJAVE DESERT FRIDAY AND
BECOME QUITE STRONG ON SATURDAY RESULTING IN AREAS OF BLOWING DUST.
WARMER AND DRIER CONDITIONS ARE EXPECTED NEXT WEEK.

&&

.UPDATE...WEAK SHORTWAVE WILL MOVE ACROSS NEVADA TODAY GENERATING
ANOTHER ROUND OF ISOLATED TO SCATTERED SHOWERS AND THUNDERSTORMS.
THE ACTIVITY IS NOT EXPECTED TO BE AS WIDESPREAD AS IT WAS YESTERDAY
AND WILL MAINLY BE CONFINED TO THE EASTERN HALF OF THE FORECAST
AREA. PW VALUES ARE UP SLIGHTLY FROM 24 HOURS AGO AND SOME STORMS
YESTERDAY DID PRODUCE NEARLY AN INCH OF RAIN IN SPOTS...SO HEAVY
RAIN WILL AGAIN BE POSSIBLE WITH SOME OF THE STRONGER STORMS. GUSTY
WINDS ARE EXPECTED TO DEVELOP THIS AFTERNOON ESPECIALLY ACROSS THE
WESTERN MOJAVE DESERT AND THE CURRENT WIND ADVISORY LOOKS GOOD. NO
UPDATES AT THIS TIME.
&&

PREV DISCUSSION
220 AM PDT FRI APR 24, 2015

.SHORT TERM...THROUGH SATURDAY NIGHT.

VERY ACTIVE SPRING WEATHER IN PLAY AT THE MOMENT WITH A SERIES OF
DISTURBANCES INFLUENCING THE REGION. NEXT SHORTWAVE TO AFFECT THE
REGION WILL MOVE ACROSS NEVADA TODAY INITIATING ANOTHER ROUND OF
SHOWERS AND ISOLATED THUNDERSTORMS MAINLY FOR OUR SOUTHERN GREAT
BASIN ZONES. SOUTH OF THE GREAT BASIN...A FEW STRAY SHOWERS OR
ISOLATED THUNDERSTORMS WILL BE POSSIBLE BUT INSTABILITY AND MOISTURE
WILL BE A LIMITING FACTOR. ACROSS THE GREAT BASIN...FAIRLY STRONG
FRONTOGENISIS ASSOCIATED WITH THE SHORTWAVE WILL RESULT IN
CONSIDERABLE SHOWER COVERAGE FOR OUR NORTHERN ZONES WHICH MAY PICK
UP BETWEEN A TENTH AND A QUARTER OF INCH OF RAIN BY LATE FRIDAY
EVENING.  MEANWHILE FURTHER SOUTH...INCREASINGLY TIGHT PRESSURE
GRADIENTS WILL RESULT IN GUSTY WINDS DEVELOPING ACROSS SAN
BERNARDINO COUNTY. AREAS OF BLOWING DUST ARE POSSIBLE IN ADDITION TO
STRONG CROSSWINDS ON NORTH-SOUTH ORIENTED ROADWAYS.

ON SATURDAY...THE FINAL AND STRONGEST TROUGH OF THE SERIES WE HAVE
OBSERVED THIS WEEK WILL DIVE INTO THE REGION. MODEL TRENDS HAVE
CONSISTENTLY BEEN DEVELOPING THIS SYSTEM FURTHER AND FURTHER WEST
WHICH RESULTS IN LARGER IMPACTS TO OUR REGION. NOW THE STRONGEST
FORCING ASSOCIATED WITH THE TROUGH TRACKS RIGHT ACROSS OUR FORECAST
AREA AND MAY SUPPORT SCATTERED SHOWER DEVELOPMENT ALMOST ANYWHERE.
THE GREATEST CHANCES FOR RAINFALL STILL APPEAR TO BE ACROSS THE
SOUTHERN GREAT BASIN...BUT WITH THE CORE OF THE SHORTWAVE ENERGY
TRACKING ACROSS EASTERN CALIFORNIA AND INTO ARIZONA...FORCING AND
INSTABILITY MAY BE ENOUGH TO GENERATE SOME SHOWERS AND THUNDERSTORMS
ACROSS THE MOJAVE DESERT. A LOOK AT THE FORECAST SOUNDINGS FOR LAS
VEGAS ON SATURDAY ALSO SUPPORT SHOWER ACTIVITY. FOR THESE REASONS
...I INCREASED POPS INTO THE SLIGHT CHANCE OR GREATER CATEGORY AREA
WIDE FOR SATURDAY.

THE OTHER CONCERN SATURDAY WILL BE WINDS. VERY STRONG WINDS AS A
RESULT OF RAPID HEIGHT FALLS AND A STRONG PRESSURE GRADIENT ARE
BEING INDICATED BY MOS GUIDANCE AND HIGH RES MODEL FORECASTS.
GUIDANCE SUGGESTS WIND GUSTS IN THE WESTERN MOJAVE DESERT OF 55 TO
65 MPH. THIS IS WELL INTO THE HIGH WIND THRESHOLD AND WILL
UNDOUBTEDLY LEAD TO BLOWING DUST CONCERNS AS WELL AS DANGEROUS
TRAVEL CONDITIONS FOR HIGH PROFILE VEHICLES. STRONG WINDS MAY EXTEND
EAST ACROSS EASTERN SAN BERNARDINO COUNTY AND SOUTHERN CLARK COUNTY
AS WELL WHICH WILL NEED TO BE MONITORED FOR ADDITIONAL WIND
HEADLINES.

BY SATURDAY EVENING THE TROUGH WILL SHIFT EAST WITH PRECIPITATION
MOVING INTO ARIZONA AND AWAY FROM OUR AREA. WINDS WILL GRADUALLY
EASE OVERNIGHT AS WELL.

.LONG TERM...SUNDAY MORNING THROUGH THURSDAY.

AT THE START OF THE LONG TERM PERIOD THE DEEP TROUGH THAT WILL PASS
THROUGH OUR AREA SATURDAY WILL BE JUST EAST OF THE NEVADA-UTAH
BORDER. THE MAJORITY OF THE PRECIPITATION WILL BE EAST OF OUR AREA
SUNDAY, WITH JUST A 20-30 PERCENT CHANCE OF SHOWERS ACROSS EASTERN
MOHAVE AND LINCOLN COUNTIES FOR MAINLY THE FIRST HALF OF THE DAY.
THE BIGGER STORY WILL BE WIND. EXPECT GUSTY NORTH WINDS OF 20-30
MPH, WITH HIGHER GUSTS LIKELY ALONG THE COLORADO RIVER VALLEY. AS
MENTIONED IN THE PREVIOUS DISCUSSION, WIND HEADLINE PRODUCTS MAY BE
NEEDED. SUNDAY AFTERNOON TEMPERATURES WILL CONTINUE TO RUN BELOW
NORMAL FOR THIS TIME OF YEAR.

DRY CONDITIONS WILL PREVAIL FOR THE REMAINDER OF THE FORECAST
PERIOD. GUSTY NORTH WINDS WILL LINGER INTO MONDAY, BUT WIND SPEEDS
WILL DECREASE AS HIGH PRESSURE FULLY TAKES CONTROL TUESDAY. AS HIGH
PRESSURE BUILDS OVER THE AREA, TEMPERATURES WILL TREND MUCH WARMER.
AFTERNOON TEMPERATURES WILL BE NEAR OR SLIGHTLY ABOVE NORMAL MONDAY
BEFORE LIKELY CLIMBING 10 DEGREES ABOVE NORMAL FOR THE LATTER HALF
OF THE WEEK. MODELS ARE IN FAIRLY GOOD AGREEMENT MOVING A LOW
PRESSURE SYSTEM THROUGH THE PACIFIC NORTHWEST LATE THURSDAY THROUGH
FRIDAY, BUT DIFFER ON THE STRENGTH. WE MAY SEE SOME BREEZY SOUTHWEST
WINDS LATE IN THE PERIOD.

&&

.AVIATION...FOR MCCARRAN...GENERALLY SOUTHERLY WINDS EXPECTED ONCE
AGAIN TODAY WITH SPEEDS IN THE 15-20 KT RANGE AFTER 16Z. GUSTS MAY
REACH UP TO 30 KTS AT TIMES. LESS SHOWER ACTIVITY EXPECTED TODAY
THOUGH SOME AFTERNOON CUMULUS AND SCT-BKN MID LEVEL CLOUD COVER IS
LIKELY BY THE MID AFTERNOON.  WIND SPEEDS AFTER SUNSET WILL
GRADUALLY EASE INTO THE 12-15KT RANGE WITH GUSTS TO 20 KTS
OVERNIGHT.

.FOR THE REST OF SOUTHERN NEVADA...NORTHWEST ARIZONA...AND SOUTHEAST
CALIFORNIA...BREEZY CONDITIONS EXPECTED ACROSS MUCH OF THE REGION
WITH SOUTHWESTERLY SURFACE WINDS OF 15-20KTS AND GUSTS TO 30KTS
EXPECTED ACROSS MUCH OF THE AREA. STRONGER WINDS ARE EXPECTED ACROSS
THE WESTERN MOJAVE DESERT NEAR KDAG WHERE SURFACE WINDS OF 25-35KTS
AND GUSTS TO 40KTS ARE EXPECTED WITH AREAS OF BLOWING DUST POSSIBLE.
SHOWER ACTIVITY CAN BE EXPECTED ACROSS THE MOUNTAINS OF INYO
COUNTY... THE SOUTHERN GREAT BASIN...AND NORTHERN MOHAVE COUNTY. SCT-
BKN CUMULUS WITH BASES OF 7-10K EXPECTED ELSEWHERE.

 &&

.SPOTTER INFORMATION STATEMENT...SPOTTERS SHOULD REPORT ACCORDING TO
STANDARD OPERATING PROCEDURES.
&&

$$

UPDATE...GORELOW
SHORT TERM/AVIATION...OUTLER
LONG TERM...PADDOCK

FOR MORE FORECAST INFORMATION...SEE US ON OUR WEBPAGE:

HTTP://WEATHER.GOV/LASVEGAS OR FOLLOW US ON FACEBOOK AND TWITTER





000
FXUS65 KVEF 241639 AAA
AFDVEF

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
938 AM PDT FRI APR 24 2015

.SYNOPSIS...UNSETTLED WEATHER WILL CONTINUE THROUGH SATURDAY WITH
COOL TEMPERATURES WITH SCATTERED SHOWERS AND THUNDERSTORMS IN THE
FORECAST. GREATEST CHANCES FOR RAINFALL ARE EXPECTED ACROSS THE
SOUTHERN GREAT BASIN AND NORTHWEST ARIZONA. IN ADDITION...STRONG
WINDS WILL DEVELOP ACROSS THE WESTERN MOJAVE DESERT FRIDAY AND
BECOME QUITE STRONG ON SATURDAY RESULTING IN AREAS OF BLOWING DUST.
WARMER AND DRIER CONDITIONS ARE EXPECTED NEXT WEEK.

&&

.UPDATE...WEAK SHORTWAVE WILL MOVE ACROSS NEVADA TODAY GENERATING
ANOTHER ROUND OF ISOLATED TO SCATTERED SHOWERS AND THUNDERSTORMS.
THE ACTIVITY IS NOT EXPECTED TO BE AS WIDESPREAD AS IT WAS YESTERDAY
AND WILL MAINLY BE CONFINED TO THE EASTERN HALF OF THE FORECAST
AREA. PW VALUES ARE UP SLIGHTLY FROM 24 HOURS AGO AND SOME STORMS
YESTERDAY DID PRODUCE NEARLY AN INCH OF RAIN IN SPOTS...SO HEAVY
RAIN WILL AGAIN BE POSSIBLE WITH SOME OF THE STRONGER STORMS. GUSTY
WINDS ARE EXPECTED TO DEVELOP THIS AFTERNOON ESPECIALLY ACROSS THE
WESTERN MOJAVE DESERT AND THE CURRENT WIND ADVISORY LOOKS GOOD. NO
UPDATES AT THIS TIME.
&&

PREV DISCUSSION
220 AM PDT FRI APR 24, 2015

.SHORT TERM...THROUGH SATURDAY NIGHT.

VERY ACTIVE SPRING WEATHER IN PLAY AT THE MOMENT WITH A SERIES OF
DISTURBANCES INFLUENCING THE REGION. NEXT SHORTWAVE TO AFFECT THE
REGION WILL MOVE ACROSS NEVADA TODAY INITIATING ANOTHER ROUND OF
SHOWERS AND ISOLATED THUNDERSTORMS MAINLY FOR OUR SOUTHERN GREAT
BASIN ZONES. SOUTH OF THE GREAT BASIN...A FEW STRAY SHOWERS OR
ISOLATED THUNDERSTORMS WILL BE POSSIBLE BUT INSTABILITY AND MOISTURE
WILL BE A LIMITING FACTOR. ACROSS THE GREAT BASIN...FAIRLY STRONG
FRONTOGENISIS ASSOCIATED WITH THE SHORTWAVE WILL RESULT IN
CONSIDERABLE SHOWER COVERAGE FOR OUR NORTHERN ZONES WHICH MAY PICK
UP BETWEEN A TENTH AND A QUARTER OF INCH OF RAIN BY LATE FRIDAY
EVENING.  MEANWHILE FURTHER SOUTH...INCREASINGLY TIGHT PRESSURE
GRADIENTS WILL RESULT IN GUSTY WINDS DEVELOPING ACROSS SAN
BERNARDINO COUNTY. AREAS OF BLOWING DUST ARE POSSIBLE IN ADDITION TO
STRONG CROSSWINDS ON NORTH-SOUTH ORIENTED ROADWAYS.

ON SATURDAY...THE FINAL AND STRONGEST TROUGH OF THE SERIES WE HAVE
OBSERVED THIS WEEK WILL DIVE INTO THE REGION. MODEL TRENDS HAVE
CONSISTENTLY BEEN DEVELOPING THIS SYSTEM FURTHER AND FURTHER WEST
WHICH RESULTS IN LARGER IMPACTS TO OUR REGION. NOW THE STRONGEST
FORCING ASSOCIATED WITH THE TROUGH TRACKS RIGHT ACROSS OUR FORECAST
AREA AND MAY SUPPORT SCATTERED SHOWER DEVELOPMENT ALMOST ANYWHERE.
THE GREATEST CHANCES FOR RAINFALL STILL APPEAR TO BE ACROSS THE
SOUTHERN GREAT BASIN...BUT WITH THE CORE OF THE SHORTWAVE ENERGY
TRACKING ACROSS EASTERN CALIFORNIA AND INTO ARIZONA...FORCING AND
INSTABILITY MAY BE ENOUGH TO GENERATE SOME SHOWERS AND THUNDERSTORMS
ACROSS THE MOJAVE DESERT. A LOOK AT THE FORECAST SOUNDINGS FOR LAS
VEGAS ON SATURDAY ALSO SUPPORT SHOWER ACTIVITY. FOR THESE REASONS
...I INCREASED POPS INTO THE SLIGHT CHANCE OR GREATER CATEGORY AREA
WIDE FOR SATURDAY.

THE OTHER CONCERN SATURDAY WILL BE WINDS. VERY STRONG WINDS AS A
RESULT OF RAPID HEIGHT FALLS AND A STRONG PRESSURE GRADIENT ARE
BEING INDICATED BY MOS GUIDANCE AND HIGH RES MODEL FORECASTS.
GUIDANCE SUGGESTS WIND GUSTS IN THE WESTERN MOJAVE DESERT OF 55 TO
65 MPH. THIS IS WELL INTO THE HIGH WIND THRESHOLD AND WILL
UNDOUBTEDLY LEAD TO BLOWING DUST CONCERNS AS WELL AS DANGEROUS
TRAVEL CONDITIONS FOR HIGH PROFILE VEHICLES. STRONG WINDS MAY EXTEND
EAST ACROSS EASTERN SAN BERNARDINO COUNTY AND SOUTHERN CLARK COUNTY
AS WELL WHICH WILL NEED TO BE MONITORED FOR ADDITIONAL WIND
HEADLINES.

BY SATURDAY EVENING THE TROUGH WILL SHIFT EAST WITH PRECIPITATION
MOVING INTO ARIZONA AND AWAY FROM OUR AREA. WINDS WILL GRADUALLY
EASE OVERNIGHT AS WELL.

.LONG TERM...SUNDAY MORNING THROUGH THURSDAY.

AT THE START OF THE LONG TERM PERIOD THE DEEP TROUGH THAT WILL PASS
THROUGH OUR AREA SATURDAY WILL BE JUST EAST OF THE NEVADA-UTAH
BORDER. THE MAJORITY OF THE PRECIPITATION WILL BE EAST OF OUR AREA
SUNDAY, WITH JUST A 20-30 PERCENT CHANCE OF SHOWERS ACROSS EASTERN
MOHAVE AND LINCOLN COUNTIES FOR MAINLY THE FIRST HALF OF THE DAY.
THE BIGGER STORY WILL BE WIND. EXPECT GUSTY NORTH WINDS OF 20-30
MPH, WITH HIGHER GUSTS LIKELY ALONG THE COLORADO RIVER VALLEY. AS
MENTIONED IN THE PREVIOUS DISCUSSION, WIND HEADLINE PRODUCTS MAY BE
NEEDED. SUNDAY AFTERNOON TEMPERATURES WILL CONTINUE TO RUN BELOW
NORMAL FOR THIS TIME OF YEAR.

DRY CONDITIONS WILL PREVAIL FOR THE REMAINDER OF THE FORECAST
PERIOD. GUSTY NORTH WINDS WILL LINGER INTO MONDAY, BUT WIND SPEEDS
WILL DECREASE AS HIGH PRESSURE FULLY TAKES CONTROL TUESDAY. AS HIGH
PRESSURE BUILDS OVER THE AREA, TEMPERATURES WILL TREND MUCH WARMER.
AFTERNOON TEMPERATURES WILL BE NEAR OR SLIGHTLY ABOVE NORMAL MONDAY
BEFORE LIKELY CLIMBING 10 DEGREES ABOVE NORMAL FOR THE LATTER HALF
OF THE WEEK. MODELS ARE IN FAIRLY GOOD AGREEMENT MOVING A LOW
PRESSURE SYSTEM THROUGH THE PACIFIC NORTHWEST LATE THURSDAY THROUGH
FRIDAY, BUT DIFFER ON THE STRENGTH. WE MAY SEE SOME BREEZY SOUTHWEST
WINDS LATE IN THE PERIOD.

&&

.AVIATION...FOR MCCARRAN...GENERALLY SOUTHERLY WINDS EXPECTED ONCE
AGAIN TODAY WITH SPEEDS IN THE 15-20 KT RANGE AFTER 16Z. GUSTS MAY
REACH UP TO 30 KTS AT TIMES. LESS SHOWER ACTIVITY EXPECTED TODAY
THOUGH SOME AFTERNOON CUMULUS AND SCT-BKN MID LEVEL CLOUD COVER IS
LIKELY BY THE MID AFTERNOON.  WIND SPEEDS AFTER SUNSET WILL
GRADUALLY EASE INTO THE 12-15KT RANGE WITH GUSTS TO 20 KTS
OVERNIGHT.

.FOR THE REST OF SOUTHERN NEVADA...NORTHWEST ARIZONA...AND SOUTHEAST
CALIFORNIA...BREEZY CONDITIONS EXPECTED ACROSS MUCH OF THE REGION
WITH SOUTHWESTERLY SURFACE WINDS OF 15-20KTS AND GUSTS TO 30KTS
EXPECTED ACROSS MUCH OF THE AREA. STRONGER WINDS ARE EXPECTED ACROSS
THE WESTERN MOJAVE DESERT NEAR KDAG WHERE SURFACE WINDS OF 25-35KTS
AND GUSTS TO 40KTS ARE EXPECTED WITH AREAS OF BLOWING DUST POSSIBLE.
SHOWER ACTIVITY CAN BE EXPECTED ACROSS THE MOUNTAINS OF INYO
COUNTY... THE SOUTHERN GREAT BASIN...AND NORTHERN MOHAVE COUNTY. SCT-
BKN CUMULUS WITH BASES OF 7-10K EXPECTED ELSEWHERE.

 &&

.SPOTTER INFORMATION STATEMENT...SPOTTERS SHOULD REPORT ACCORDING TO
STANDARD OPERATING PROCEDURES.
&&

$$

UPDATE...GORELOW
SHORT TERM/AVIATION...OUTLER
LONG TERM...PADDOCK

FOR MORE FORECAST INFORMATION...SEE US ON OUR WEBPAGE:

HTTP://WEATHER.GOV/LASVEGAS OR FOLLOW US ON FACEBOOK AND TWITTER




000
FXUS65 KVEF 241639 AAA
AFDVEF

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
938 AM PDT FRI APR 24 2015

.SYNOPSIS...UNSETTLED WEATHER WILL CONTINUE THROUGH SATURDAY WITH
COOL TEMPERATURES WITH SCATTERED SHOWERS AND THUNDERSTORMS IN THE
FORECAST. GREATEST CHANCES FOR RAINFALL ARE EXPECTED ACROSS THE
SOUTHERN GREAT BASIN AND NORTHWEST ARIZONA. IN ADDITION...STRONG
WINDS WILL DEVELOP ACROSS THE WESTERN MOJAVE DESERT FRIDAY AND
BECOME QUITE STRONG ON SATURDAY RESULTING IN AREAS OF BLOWING DUST.
WARMER AND DRIER CONDITIONS ARE EXPECTED NEXT WEEK.

&&

.UPDATE...WEAK SHORTWAVE WILL MOVE ACROSS NEVADA TODAY GENERATING
ANOTHER ROUND OF ISOLATED TO SCATTERED SHOWERS AND THUNDERSTORMS.
THE ACTIVITY IS NOT EXPECTED TO BE AS WIDESPREAD AS IT WAS YESTERDAY
AND WILL MAINLY BE CONFINED TO THE EASTERN HALF OF THE FORECAST
AREA. PW VALUES ARE UP SLIGHTLY FROM 24 HOURS AGO AND SOME STORMS
YESTERDAY DID PRODUCE NEARLY AN INCH OF RAIN IN SPOTS...SO HEAVY
RAIN WILL AGAIN BE POSSIBLE WITH SOME OF THE STRONGER STORMS. GUSTY
WINDS ARE EXPECTED TO DEVELOP THIS AFTERNOON ESPECIALLY ACROSS THE
WESTERN MOJAVE DESERT AND THE CURRENT WIND ADVISORY LOOKS GOOD. NO
UPDATES AT THIS TIME.
&&

PREV DISCUSSION
220 AM PDT FRI APR 24, 2015

.SHORT TERM...THROUGH SATURDAY NIGHT.

VERY ACTIVE SPRING WEATHER IN PLAY AT THE MOMENT WITH A SERIES OF
DISTURBANCES INFLUENCING THE REGION. NEXT SHORTWAVE TO AFFECT THE
REGION WILL MOVE ACROSS NEVADA TODAY INITIATING ANOTHER ROUND OF
SHOWERS AND ISOLATED THUNDERSTORMS MAINLY FOR OUR SOUTHERN GREAT
BASIN ZONES. SOUTH OF THE GREAT BASIN...A FEW STRAY SHOWERS OR
ISOLATED THUNDERSTORMS WILL BE POSSIBLE BUT INSTABILITY AND MOISTURE
WILL BE A LIMITING FACTOR. ACROSS THE GREAT BASIN...FAIRLY STRONG
FRONTOGENISIS ASSOCIATED WITH THE SHORTWAVE WILL RESULT IN
CONSIDERABLE SHOWER COVERAGE FOR OUR NORTHERN ZONES WHICH MAY PICK
UP BETWEEN A TENTH AND A QUARTER OF INCH OF RAIN BY LATE FRIDAY
EVENING.  MEANWHILE FURTHER SOUTH...INCREASINGLY TIGHT PRESSURE
GRADIENTS WILL RESULT IN GUSTY WINDS DEVELOPING ACROSS SAN
BERNARDINO COUNTY. AREAS OF BLOWING DUST ARE POSSIBLE IN ADDITION TO
STRONG CROSSWINDS ON NORTH-SOUTH ORIENTED ROADWAYS.

ON SATURDAY...THE FINAL AND STRONGEST TROUGH OF THE SERIES WE HAVE
OBSERVED THIS WEEK WILL DIVE INTO THE REGION. MODEL TRENDS HAVE
CONSISTENTLY BEEN DEVELOPING THIS SYSTEM FURTHER AND FURTHER WEST
WHICH RESULTS IN LARGER IMPACTS TO OUR REGION. NOW THE STRONGEST
FORCING ASSOCIATED WITH THE TROUGH TRACKS RIGHT ACROSS OUR FORECAST
AREA AND MAY SUPPORT SCATTERED SHOWER DEVELOPMENT ALMOST ANYWHERE.
THE GREATEST CHANCES FOR RAINFALL STILL APPEAR TO BE ACROSS THE
SOUTHERN GREAT BASIN...BUT WITH THE CORE OF THE SHORTWAVE ENERGY
TRACKING ACROSS EASTERN CALIFORNIA AND INTO ARIZONA...FORCING AND
INSTABILITY MAY BE ENOUGH TO GENERATE SOME SHOWERS AND THUNDERSTORMS
ACROSS THE MOJAVE DESERT. A LOOK AT THE FORECAST SOUNDINGS FOR LAS
VEGAS ON SATURDAY ALSO SUPPORT SHOWER ACTIVITY. FOR THESE REASONS
...I INCREASED POPS INTO THE SLIGHT CHANCE OR GREATER CATEGORY AREA
WIDE FOR SATURDAY.

THE OTHER CONCERN SATURDAY WILL BE WINDS. VERY STRONG WINDS AS A
RESULT OF RAPID HEIGHT FALLS AND A STRONG PRESSURE GRADIENT ARE
BEING INDICATED BY MOS GUIDANCE AND HIGH RES MODEL FORECASTS.
GUIDANCE SUGGESTS WIND GUSTS IN THE WESTERN MOJAVE DESERT OF 55 TO
65 MPH. THIS IS WELL INTO THE HIGH WIND THRESHOLD AND WILL
UNDOUBTEDLY LEAD TO BLOWING DUST CONCERNS AS WELL AS DANGEROUS
TRAVEL CONDITIONS FOR HIGH PROFILE VEHICLES. STRONG WINDS MAY EXTEND
EAST ACROSS EASTERN SAN BERNARDINO COUNTY AND SOUTHERN CLARK COUNTY
AS WELL WHICH WILL NEED TO BE MONITORED FOR ADDITIONAL WIND
HEADLINES.

BY SATURDAY EVENING THE TROUGH WILL SHIFT EAST WITH PRECIPITATION
MOVING INTO ARIZONA AND AWAY FROM OUR AREA. WINDS WILL GRADUALLY
EASE OVERNIGHT AS WELL.

.LONG TERM...SUNDAY MORNING THROUGH THURSDAY.

AT THE START OF THE LONG TERM PERIOD THE DEEP TROUGH THAT WILL PASS
THROUGH OUR AREA SATURDAY WILL BE JUST EAST OF THE NEVADA-UTAH
BORDER. THE MAJORITY OF THE PRECIPITATION WILL BE EAST OF OUR AREA
SUNDAY, WITH JUST A 20-30 PERCENT CHANCE OF SHOWERS ACROSS EASTERN
MOHAVE AND LINCOLN COUNTIES FOR MAINLY THE FIRST HALF OF THE DAY.
THE BIGGER STORY WILL BE WIND. EXPECT GUSTY NORTH WINDS OF 20-30
MPH, WITH HIGHER GUSTS LIKELY ALONG THE COLORADO RIVER VALLEY. AS
MENTIONED IN THE PREVIOUS DISCUSSION, WIND HEADLINE PRODUCTS MAY BE
NEEDED. SUNDAY AFTERNOON TEMPERATURES WILL CONTINUE TO RUN BELOW
NORMAL FOR THIS TIME OF YEAR.

DRY CONDITIONS WILL PREVAIL FOR THE REMAINDER OF THE FORECAST
PERIOD. GUSTY NORTH WINDS WILL LINGER INTO MONDAY, BUT WIND SPEEDS
WILL DECREASE AS HIGH PRESSURE FULLY TAKES CONTROL TUESDAY. AS HIGH
PRESSURE BUILDS OVER THE AREA, TEMPERATURES WILL TREND MUCH WARMER.
AFTERNOON TEMPERATURES WILL BE NEAR OR SLIGHTLY ABOVE NORMAL MONDAY
BEFORE LIKELY CLIMBING 10 DEGREES ABOVE NORMAL FOR THE LATTER HALF
OF THE WEEK. MODELS ARE IN FAIRLY GOOD AGREEMENT MOVING A LOW
PRESSURE SYSTEM THROUGH THE PACIFIC NORTHWEST LATE THURSDAY THROUGH
FRIDAY, BUT DIFFER ON THE STRENGTH. WE MAY SEE SOME BREEZY SOUTHWEST
WINDS LATE IN THE PERIOD.

&&

.AVIATION...FOR MCCARRAN...GENERALLY SOUTHERLY WINDS EXPECTED ONCE
AGAIN TODAY WITH SPEEDS IN THE 15-20 KT RANGE AFTER 16Z. GUSTS MAY
REACH UP TO 30 KTS AT TIMES. LESS SHOWER ACTIVITY EXPECTED TODAY
THOUGH SOME AFTERNOON CUMULUS AND SCT-BKN MID LEVEL CLOUD COVER IS
LIKELY BY THE MID AFTERNOON.  WIND SPEEDS AFTER SUNSET WILL
GRADUALLY EASE INTO THE 12-15KT RANGE WITH GUSTS TO 20 KTS
OVERNIGHT.

.FOR THE REST OF SOUTHERN NEVADA...NORTHWEST ARIZONA...AND SOUTHEAST
CALIFORNIA...BREEZY CONDITIONS EXPECTED ACROSS MUCH OF THE REGION
WITH SOUTHWESTERLY SURFACE WINDS OF 15-20KTS AND GUSTS TO 30KTS
EXPECTED ACROSS MUCH OF THE AREA. STRONGER WINDS ARE EXPECTED ACROSS
THE WESTERN MOJAVE DESERT NEAR KDAG WHERE SURFACE WINDS OF 25-35KTS
AND GUSTS TO 40KTS ARE EXPECTED WITH AREAS OF BLOWING DUST POSSIBLE.
SHOWER ACTIVITY CAN BE EXPECTED ACROSS THE MOUNTAINS OF INYO
COUNTY... THE SOUTHERN GREAT BASIN...AND NORTHERN MOHAVE COUNTY. SCT-
BKN CUMULUS WITH BASES OF 7-10K EXPECTED ELSEWHERE.

 &&

.SPOTTER INFORMATION STATEMENT...SPOTTERS SHOULD REPORT ACCORDING TO
STANDARD OPERATING PROCEDURES.
&&

$$

UPDATE...GORELOW
SHORT TERM/AVIATION...OUTLER
LONG TERM...PADDOCK

FOR MORE FORECAST INFORMATION...SEE US ON OUR WEBPAGE:

HTTP://WEATHER.GOV/LASVEGAS OR FOLLOW US ON FACEBOOK AND TWITTER





000
FXUS65 KVEF 241639 AAA
AFDVEF

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
938 AM PDT FRI APR 24 2015

.SYNOPSIS...UNSETTLED WEATHER WILL CONTINUE THROUGH SATURDAY WITH
COOL TEMPERATURES WITH SCATTERED SHOWERS AND THUNDERSTORMS IN THE
FORECAST. GREATEST CHANCES FOR RAINFALL ARE EXPECTED ACROSS THE
SOUTHERN GREAT BASIN AND NORTHWEST ARIZONA. IN ADDITION...STRONG
WINDS WILL DEVELOP ACROSS THE WESTERN MOJAVE DESERT FRIDAY AND
BECOME QUITE STRONG ON SATURDAY RESULTING IN AREAS OF BLOWING DUST.
WARMER AND DRIER CONDITIONS ARE EXPECTED NEXT WEEK.

&&

.UPDATE...WEAK SHORTWAVE WILL MOVE ACROSS NEVADA TODAY GENERATING
ANOTHER ROUND OF ISOLATED TO SCATTERED SHOWERS AND THUNDERSTORMS.
THE ACTIVITY IS NOT EXPECTED TO BE AS WIDESPREAD AS IT WAS YESTERDAY
AND WILL MAINLY BE CONFINED TO THE EASTERN HALF OF THE FORECAST
AREA. PW VALUES ARE UP SLIGHTLY FROM 24 HOURS AGO AND SOME STORMS
YESTERDAY DID PRODUCE NEARLY AN INCH OF RAIN IN SPOTS...SO HEAVY
RAIN WILL AGAIN BE POSSIBLE WITH SOME OF THE STRONGER STORMS. GUSTY
WINDS ARE EXPECTED TO DEVELOP THIS AFTERNOON ESPECIALLY ACROSS THE
WESTERN MOJAVE DESERT AND THE CURRENT WIND ADVISORY LOOKS GOOD. NO
UPDATES AT THIS TIME.
&&

PREV DISCUSSION
220 AM PDT FRI APR 24, 2015

.SHORT TERM...THROUGH SATURDAY NIGHT.

VERY ACTIVE SPRING WEATHER IN PLAY AT THE MOMENT WITH A SERIES OF
DISTURBANCES INFLUENCING THE REGION. NEXT SHORTWAVE TO AFFECT THE
REGION WILL MOVE ACROSS NEVADA TODAY INITIATING ANOTHER ROUND OF
SHOWERS AND ISOLATED THUNDERSTORMS MAINLY FOR OUR SOUTHERN GREAT
BASIN ZONES. SOUTH OF THE GREAT BASIN...A FEW STRAY SHOWERS OR
ISOLATED THUNDERSTORMS WILL BE POSSIBLE BUT INSTABILITY AND MOISTURE
WILL BE A LIMITING FACTOR. ACROSS THE GREAT BASIN...FAIRLY STRONG
FRONTOGENISIS ASSOCIATED WITH THE SHORTWAVE WILL RESULT IN
CONSIDERABLE SHOWER COVERAGE FOR OUR NORTHERN ZONES WHICH MAY PICK
UP BETWEEN A TENTH AND A QUARTER OF INCH OF RAIN BY LATE FRIDAY
EVENING.  MEANWHILE FURTHER SOUTH...INCREASINGLY TIGHT PRESSURE
GRADIENTS WILL RESULT IN GUSTY WINDS DEVELOPING ACROSS SAN
BERNARDINO COUNTY. AREAS OF BLOWING DUST ARE POSSIBLE IN ADDITION TO
STRONG CROSSWINDS ON NORTH-SOUTH ORIENTED ROADWAYS.

ON SATURDAY...THE FINAL AND STRONGEST TROUGH OF THE SERIES WE HAVE
OBSERVED THIS WEEK WILL DIVE INTO THE REGION. MODEL TRENDS HAVE
CONSISTENTLY BEEN DEVELOPING THIS SYSTEM FURTHER AND FURTHER WEST
WHICH RESULTS IN LARGER IMPACTS TO OUR REGION. NOW THE STRONGEST
FORCING ASSOCIATED WITH THE TROUGH TRACKS RIGHT ACROSS OUR FORECAST
AREA AND MAY SUPPORT SCATTERED SHOWER DEVELOPMENT ALMOST ANYWHERE.
THE GREATEST CHANCES FOR RAINFALL STILL APPEAR TO BE ACROSS THE
SOUTHERN GREAT BASIN...BUT WITH THE CORE OF THE SHORTWAVE ENERGY
TRACKING ACROSS EASTERN CALIFORNIA AND INTO ARIZONA...FORCING AND
INSTABILITY MAY BE ENOUGH TO GENERATE SOME SHOWERS AND THUNDERSTORMS
ACROSS THE MOJAVE DESERT. A LOOK AT THE FORECAST SOUNDINGS FOR LAS
VEGAS ON SATURDAY ALSO SUPPORT SHOWER ACTIVITY. FOR THESE REASONS
...I INCREASED POPS INTO THE SLIGHT CHANCE OR GREATER CATEGORY AREA
WIDE FOR SATURDAY.

THE OTHER CONCERN SATURDAY WILL BE WINDS. VERY STRONG WINDS AS A
RESULT OF RAPID HEIGHT FALLS AND A STRONG PRESSURE GRADIENT ARE
BEING INDICATED BY MOS GUIDANCE AND HIGH RES MODEL FORECASTS.
GUIDANCE SUGGESTS WIND GUSTS IN THE WESTERN MOJAVE DESERT OF 55 TO
65 MPH. THIS IS WELL INTO THE HIGH WIND THRESHOLD AND WILL
UNDOUBTEDLY LEAD TO BLOWING DUST CONCERNS AS WELL AS DANGEROUS
TRAVEL CONDITIONS FOR HIGH PROFILE VEHICLES. STRONG WINDS MAY EXTEND
EAST ACROSS EASTERN SAN BERNARDINO COUNTY AND SOUTHERN CLARK COUNTY
AS WELL WHICH WILL NEED TO BE MONITORED FOR ADDITIONAL WIND
HEADLINES.

BY SATURDAY EVENING THE TROUGH WILL SHIFT EAST WITH PRECIPITATION
MOVING INTO ARIZONA AND AWAY FROM OUR AREA. WINDS WILL GRADUALLY
EASE OVERNIGHT AS WELL.

.LONG TERM...SUNDAY MORNING THROUGH THURSDAY.

AT THE START OF THE LONG TERM PERIOD THE DEEP TROUGH THAT WILL PASS
THROUGH OUR AREA SATURDAY WILL BE JUST EAST OF THE NEVADA-UTAH
BORDER. THE MAJORITY OF THE PRECIPITATION WILL BE EAST OF OUR AREA
SUNDAY, WITH JUST A 20-30 PERCENT CHANCE OF SHOWERS ACROSS EASTERN
MOHAVE AND LINCOLN COUNTIES FOR MAINLY THE FIRST HALF OF THE DAY.
THE BIGGER STORY WILL BE WIND. EXPECT GUSTY NORTH WINDS OF 20-30
MPH, WITH HIGHER GUSTS LIKELY ALONG THE COLORADO RIVER VALLEY. AS
MENTIONED IN THE PREVIOUS DISCUSSION, WIND HEADLINE PRODUCTS MAY BE
NEEDED. SUNDAY AFTERNOON TEMPERATURES WILL CONTINUE TO RUN BELOW
NORMAL FOR THIS TIME OF YEAR.

DRY CONDITIONS WILL PREVAIL FOR THE REMAINDER OF THE FORECAST
PERIOD. GUSTY NORTH WINDS WILL LINGER INTO MONDAY, BUT WIND SPEEDS
WILL DECREASE AS HIGH PRESSURE FULLY TAKES CONTROL TUESDAY. AS HIGH
PRESSURE BUILDS OVER THE AREA, TEMPERATURES WILL TREND MUCH WARMER.
AFTERNOON TEMPERATURES WILL BE NEAR OR SLIGHTLY ABOVE NORMAL MONDAY
BEFORE LIKELY CLIMBING 10 DEGREES ABOVE NORMAL FOR THE LATTER HALF
OF THE WEEK. MODELS ARE IN FAIRLY GOOD AGREEMENT MOVING A LOW
PRESSURE SYSTEM THROUGH THE PACIFIC NORTHWEST LATE THURSDAY THROUGH
FRIDAY, BUT DIFFER ON THE STRENGTH. WE MAY SEE SOME BREEZY SOUTHWEST
WINDS LATE IN THE PERIOD.

&&

.AVIATION...FOR MCCARRAN...GENERALLY SOUTHERLY WINDS EXPECTED ONCE
AGAIN TODAY WITH SPEEDS IN THE 15-20 KT RANGE AFTER 16Z. GUSTS MAY
REACH UP TO 30 KTS AT TIMES. LESS SHOWER ACTIVITY EXPECTED TODAY
THOUGH SOME AFTERNOON CUMULUS AND SCT-BKN MID LEVEL CLOUD COVER IS
LIKELY BY THE MID AFTERNOON.  WIND SPEEDS AFTER SUNSET WILL
GRADUALLY EASE INTO THE 12-15KT RANGE WITH GUSTS TO 20 KTS
OVERNIGHT.

.FOR THE REST OF SOUTHERN NEVADA...NORTHWEST ARIZONA...AND SOUTHEAST
CALIFORNIA...BREEZY CONDITIONS EXPECTED ACROSS MUCH OF THE REGION
WITH SOUTHWESTERLY SURFACE WINDS OF 15-20KTS AND GUSTS TO 30KTS
EXPECTED ACROSS MUCH OF THE AREA. STRONGER WINDS ARE EXPECTED ACROSS
THE WESTERN MOJAVE DESERT NEAR KDAG WHERE SURFACE WINDS OF 25-35KTS
AND GUSTS TO 40KTS ARE EXPECTED WITH AREAS OF BLOWING DUST POSSIBLE.
SHOWER ACTIVITY CAN BE EXPECTED ACROSS THE MOUNTAINS OF INYO
COUNTY... THE SOUTHERN GREAT BASIN...AND NORTHERN MOHAVE COUNTY. SCT-
BKN CUMULUS WITH BASES OF 7-10K EXPECTED ELSEWHERE.

 &&

.SPOTTER INFORMATION STATEMENT...SPOTTERS SHOULD REPORT ACCORDING TO
STANDARD OPERATING PROCEDURES.
&&

$$

UPDATE...GORELOW
SHORT TERM/AVIATION...OUTLER
LONG TERM...PADDOCK

FOR MORE FORECAST INFORMATION...SEE US ON OUR WEBPAGE:

HTTP://WEATHER.GOV/LASVEGAS OR FOLLOW US ON FACEBOOK AND TWITTER




000
FXUS65 KVEF 240922
AFDVEF

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
220 AM PDT FRI APR 24 2015

.SYNOPSIS...UNSETTLED WEATHER WILL CONTINUE THROUGH SATURDAY WITH
COOL TEMPERATURES WITH SCATTERED SHOWERS AND THUNDERSTORMS IN THE
FORECAST. GREATEST CHANCES FOR RAINFALL ARE EXPECTED ACROSS THE
SOUTHERN GREAT BASIN AND NORTHWEST ARIZONA. IN ADDITION...STRONG
WINDS WILL DEVELOP ACROSS THE WESTERN MOJAVE DESERT FRIDAY AND
BECOME QUITE STRONG ON SATURDAY RESULTING IN AREAS OF BLOWING DUST.
WARMER AND DRIER CONDITIONS ARE EXPECTED NEXT WEEK.

&&

.SHORT TERM...THROUGH SATURDAY NIGHT.

VERY ACTIVE SPRING WEATHER IN PLAY AT THE MOMENT WITH A SERIES OF
DISTURBANCES INFLUENCING THE REGION. NEXT SHORTWAVE TO AFFECT THE
REGION WILL MOVE ACROSS NEVADA TODAY INITIATING ANOTHER ROUND OF
SHOWERS AND ISOLATED THUNDERSTORMS MAINLY FOR OUR SOUTHERN GREAT
BASIN ZONES. SOUTH OF THE GREAT BASIN...A FEW STRAY SHOWERS OR
ISOLATED THUNDERSTORMS WILL BE POSSIBLE BUT INSTABILITY AND MOISTURE
WILL BE A LIMITING FACTOR. ACROSS THE GREAT BASIN...FAIRLY STRONG
FRONTOGENISIS ASSOCIATED WITH THE SHORTWAVE WILL RESULT IN
CONSIDERABLE SHOWER COVERAGE FOR OUR NORTHERN ZONES WHICH MAY PICK
UP BETWEEN A TENTH AND A QUARTER OF INCH OF RAIN BY LATE FRIDAY
EVENING.  MEANWHILE FURTHER SOUTH...INCREASINGLY TIGHT PRESSURE
GRADIENTS WILL RESULT IN GUSTY WINDS DEVELOPING ACROSS SAN
BERNARDINO COUNTY. AREAS OF BLOWING DUST ARE POSSIBLE IN ADDITION TO
STRONG CROSSWINDS ON NORTH-SOUTH ORIENTED ROADWAYS.

ON SATURDAY...THE FINAL AND STRONGEST TROUGH OF THE SERIES WEVE
OBSERVED THIS WEEK WILL DIVE INTO THE REGION. MODEL TRENDS HAVE
CONSISTENTLY BEEN DEVELOPING THIS SYSTEM FURTHER AND FURTHER WEST
WHICH RESULTS IN LARGER IMPACTS TO OUR REGION. NOW THE STRONGEST
FORCING ASSOCIATED WITH THE TROUGH TRACKS RIGHT ACROSS OUR FORECAST
AREA AND MAY SUPPORT SCATTERED SHOWER DEVELOPMENT ALMOST ANYWHERE.
THE GREATEST CHANCES FOR RAINFALL STILL APPEAR TO BE ACROSS THE
SOUTHERN GREAT BASIN...BUT WITH THE CORE OF THE SHORTWAVE ENERGY
TRACKING ACROSS EASTERN CALIFORNIA AND INTO ARIZONA...FORCING AND
INSTABILITY MAY BE ENOUGH TO GENERATE SOME SHOWERS AND THUNDERSTORMS
ACROSS THE MOJAVE DESERT. A LOOK AT THE FORECAST SOUNDINGS FOR LAS
VEGAS ON SATURDAY ALSO SUPPORT SHOWER ACTIVITY. FOR THESE REASONS
...I INCREASED POPS INTO THE SLIGHT CHANCE OR GREATER CATEGORY AREA
WIDE FOR SATURDAY.

THE OTHER CONCERN SATURDAY WILL BE WINDS. VERY STRONG WINDS AS A
RESULT OF RAPID HEIGHT FALLS AND A STRONG PRESSURE GRADIENT ARE
BEING INDICATED BY MOS GUIDANCE AND HIGH RES MODEL FORECASTS.
GUIDANCE SUGGESTS WIND GUSTS IN THE WESTERN MOJAVE DESERT OF 55 TO
65 MPH. THIS IS WELL INTO THE HIGH WIND THRESHOLD AND WILL
UNDOUBTEDLY LEAD TO BLOWING DUST CONCERNS AS WELL AS DANGEROUS
TRAVEL CONDITIONS FOR HIGH PROFILE VEHICLES. STRONG WINDS MAY EXTEND
EAST ACROSS EASTERN SAN BERNARDINO COUNTY AND SOUTHERN CLARK COUNTY
AS WELL WHICH WILL NEED TO BE MONITORED FOR ADDITIONAL WIND
HEADLINES.

BY SATURDAY EVENING THE TROUGH WILL SHIFT EAST WITH PRECIPITATION
MOVING INTO ARIZONA AND AWAY FROM OUR AREA. WINDS WILL GRADUALLY
EASE OVERNIGHT AS WELL.

.LONG TERM...SUNDAY MORNING THROUGH THURSDAY.

AT THE START OF THE LONG TERM PERIOD THE DEEP TROUGH THAT WILL PASS
THROUGH OUR AREA SATURDAY WILL BE JUST EAST OF THE NEVADA-UTAH
BORDER. THE MAJORITY OF THE PRECIPITATION WILL BE EAST OF OUR AREA
SUNDAY, WITH JUST A 20-30 PERCENT CHANCE OF SHOWERS ACROSS EASTERN
MOHAVE AND LINCOLN COUNTIES FOR MAINLY THE FIRST HALF OF THE DAY.
THE BIGGER STORY WILL BE WIND. EXPECT GUSTY NORTH WINDS OF 20-30
MPH, WITH HIGHER GUSTS LIKELY ALONG THE COLORADO RIVER VALLEY. AS
MENTIONED IN THE PREVIOUS DISCUSSION, WIND HEADLINE PRODUCTS MAY BE
NEEDED. SUNDAY AFTERNOON TEMPERATURES WILL CONTINUE TO RUN BELOW
NORMAL FOR THIS TIME OF YEAR.

DRY CONDITIONS WILL PREVAIL FOR THE REMAINDER OF THE FORECAST
PERIOD. GUSTY NORTH WINDS WILL LINGER INTO MONDAY, BUT WIND SPEEDS
WILL DECREASE AS HIGH PRESSURE FULLY TAKES CONTROL TUESDAY. AS HIGH
PRESSURE BUILDS OVER THE AREA, TEMPERATURES WILL TREND MUCH WARMER.
AFTERNOON TEMPERATURES WILL BE NEAR OR SLIGHTLY ABOVE NORMAL MONDAY
BEFORE LIKELY CLIMBING 10 DEGREES ABOVE NORMAL FOR THE LATTER HALF
OF THE WEEK. MODELS ARE IN FAIRLY GOOD AGREEMENT MOVING A LOW
PRESSURE SYSTEM THROUGH THE PACIFIC NORTHWEST LATE THURSDAY THROUGH
FRIDAY, BUT DIFFER ON THE STRENGTH. WE MAY SEE SOME BREEZY SOUTHWEST
WINDS LATE IN THE PERIOD.

&&

.AVIATION...FOR MCCARRAN...GENERALLY SOUTHERLY WINDS EXPECTED ONCE
AGAIN TODAY WITH SPEEDS IN THE 15-20 KT RANGE AFTER 16Z. GUSTS MAY
REACH UP TO 30 KTS AT TIMES. LESS SHOWER ACTIVITY EXPECTED TODAY
THOUGH SOME AFTERNOON CUMULUS AND SCT-BKN MID LEVEL CLOUD COVER IS
LIKELY BY THE MID AFTERNOON.  WIND SPEEDS AFTER SUNSET WILL
GRADUALLY EASE INTO THE 12-15KT RANGE WITH GUSTS TO 20 KTS
OVERNIGHT.

.FOR THE REST OF SOUTHERN NEVADA...NORTHWEST ARIZONA...AND SOUTHEAST
CALIFORNIA...BREEZY CONDITIONS EXPECTED ACROSS MUCH OF THE REGION
WITH SOUTHWESTERLY SURFACE WINDS OF 15-20KTS AND GUSTS TO 30KTS
EXPECTED ACORSS MUCH OF THE AREA. STRONGER WINDS ARE EXPECTED ACROSS
THE WESTERN MOJAVE DESERT NEAR KDAG WHERE SURFACE WINDS OF 25-35KTS
AND GUSTS TO 40KTS ARE EXPECTED WITH AREAS OF BLOWING DUST POSSIBLE.
SHOWER ACTIVITY CAN BE EXPECTED ACROSS THE MOUNTAINS OF INYO
COUNTY... THE SOUTHERN GREAT BASIN...AND NORTHERN MOHAVE COUNTY. SCT-
BKN CUMULUS WITH BASES OF 7-10K EXPECTED ELSEHWERE.

 &&

.SPOTTER INFORMATION STATEMENT...SPOTTERS SHOULD REPORT ACCORDING TO
STANDARD OPERATING PROCEDURES.
&&

$$

SHORT TERM/AVIATION...OUTLER
LONG TERM...PADDOCK

FOR MORE FORECAST INFORMATION...SEE US ON OUR WEBPAGE:

HTTP://WEATHER.GOV/LASVEGAS OR FOLLOW US ON FACEBOOK AND TWITTER




000
FXUS65 KVEF 240922
AFDVEF

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
220 AM PDT FRI APR 24 2015

.SYNOPSIS...UNSETTLED WEATHER WILL CONTINUE THROUGH SATURDAY WITH
COOL TEMPERATURES WITH SCATTERED SHOWERS AND THUNDERSTORMS IN THE
FORECAST. GREATEST CHANCES FOR RAINFALL ARE EXPECTED ACROSS THE
SOUTHERN GREAT BASIN AND NORTHWEST ARIZONA. IN ADDITION...STRONG
WINDS WILL DEVELOP ACROSS THE WESTERN MOJAVE DESERT FRIDAY AND
BECOME QUITE STRONG ON SATURDAY RESULTING IN AREAS OF BLOWING DUST.
WARMER AND DRIER CONDITIONS ARE EXPECTED NEXT WEEK.

&&

.SHORT TERM...THROUGH SATURDAY NIGHT.

VERY ACTIVE SPRING WEATHER IN PLAY AT THE MOMENT WITH A SERIES OF
DISTURBANCES INFLUENCING THE REGION. NEXT SHORTWAVE TO AFFECT THE
REGION WILL MOVE ACROSS NEVADA TODAY INITIATING ANOTHER ROUND OF
SHOWERS AND ISOLATED THUNDERSTORMS MAINLY FOR OUR SOUTHERN GREAT
BASIN ZONES. SOUTH OF THE GREAT BASIN...A FEW STRAY SHOWERS OR
ISOLATED THUNDERSTORMS WILL BE POSSIBLE BUT INSTABILITY AND MOISTURE
WILL BE A LIMITING FACTOR. ACROSS THE GREAT BASIN...FAIRLY STRONG
FRONTOGENISIS ASSOCIATED WITH THE SHORTWAVE WILL RESULT IN
CONSIDERABLE SHOWER COVERAGE FOR OUR NORTHERN ZONES WHICH MAY PICK
UP BETWEEN A TENTH AND A QUARTER OF INCH OF RAIN BY LATE FRIDAY
EVENING.  MEANWHILE FURTHER SOUTH...INCREASINGLY TIGHT PRESSURE
GRADIENTS WILL RESULT IN GUSTY WINDS DEVELOPING ACROSS SAN
BERNARDINO COUNTY. AREAS OF BLOWING DUST ARE POSSIBLE IN ADDITION TO
STRONG CROSSWINDS ON NORTH-SOUTH ORIENTED ROADWAYS.

ON SATURDAY...THE FINAL AND STRONGEST TROUGH OF THE SERIES WEVE
OBSERVED THIS WEEK WILL DIVE INTO THE REGION. MODEL TRENDS HAVE
CONSISTENTLY BEEN DEVELOPING THIS SYSTEM FURTHER AND FURTHER WEST
WHICH RESULTS IN LARGER IMPACTS TO OUR REGION. NOW THE STRONGEST
FORCING ASSOCIATED WITH THE TROUGH TRACKS RIGHT ACROSS OUR FORECAST
AREA AND MAY SUPPORT SCATTERED SHOWER DEVELOPMENT ALMOST ANYWHERE.
THE GREATEST CHANCES FOR RAINFALL STILL APPEAR TO BE ACROSS THE
SOUTHERN GREAT BASIN...BUT WITH THE CORE OF THE SHORTWAVE ENERGY
TRACKING ACROSS EASTERN CALIFORNIA AND INTO ARIZONA...FORCING AND
INSTABILITY MAY BE ENOUGH TO GENERATE SOME SHOWERS AND THUNDERSTORMS
ACROSS THE MOJAVE DESERT. A LOOK AT THE FORECAST SOUNDINGS FOR LAS
VEGAS ON SATURDAY ALSO SUPPORT SHOWER ACTIVITY. FOR THESE REASONS
...I INCREASED POPS INTO THE SLIGHT CHANCE OR GREATER CATEGORY AREA
WIDE FOR SATURDAY.

THE OTHER CONCERN SATURDAY WILL BE WINDS. VERY STRONG WINDS AS A
RESULT OF RAPID HEIGHT FALLS AND A STRONG PRESSURE GRADIENT ARE
BEING INDICATED BY MOS GUIDANCE AND HIGH RES MODEL FORECASTS.
GUIDANCE SUGGESTS WIND GUSTS IN THE WESTERN MOJAVE DESERT OF 55 TO
65 MPH. THIS IS WELL INTO THE HIGH WIND THRESHOLD AND WILL
UNDOUBTEDLY LEAD TO BLOWING DUST CONCERNS AS WELL AS DANGEROUS
TRAVEL CONDITIONS FOR HIGH PROFILE VEHICLES. STRONG WINDS MAY EXTEND
EAST ACROSS EASTERN SAN BERNARDINO COUNTY AND SOUTHERN CLARK COUNTY
AS WELL WHICH WILL NEED TO BE MONITORED FOR ADDITIONAL WIND
HEADLINES.

BY SATURDAY EVENING THE TROUGH WILL SHIFT EAST WITH PRECIPITATION
MOVING INTO ARIZONA AND AWAY FROM OUR AREA. WINDS WILL GRADUALLY
EASE OVERNIGHT AS WELL.

.LONG TERM...SUNDAY MORNING THROUGH THURSDAY.

AT THE START OF THE LONG TERM PERIOD THE DEEP TROUGH THAT WILL PASS
THROUGH OUR AREA SATURDAY WILL BE JUST EAST OF THE NEVADA-UTAH
BORDER. THE MAJORITY OF THE PRECIPITATION WILL BE EAST OF OUR AREA
SUNDAY, WITH JUST A 20-30 PERCENT CHANCE OF SHOWERS ACROSS EASTERN
MOHAVE AND LINCOLN COUNTIES FOR MAINLY THE FIRST HALF OF THE DAY.
THE BIGGER STORY WILL BE WIND. EXPECT GUSTY NORTH WINDS OF 20-30
MPH, WITH HIGHER GUSTS LIKELY ALONG THE COLORADO RIVER VALLEY. AS
MENTIONED IN THE PREVIOUS DISCUSSION, WIND HEADLINE PRODUCTS MAY BE
NEEDED. SUNDAY AFTERNOON TEMPERATURES WILL CONTINUE TO RUN BELOW
NORMAL FOR THIS TIME OF YEAR.

DRY CONDITIONS WILL PREVAIL FOR THE REMAINDER OF THE FORECAST
PERIOD. GUSTY NORTH WINDS WILL LINGER INTO MONDAY, BUT WIND SPEEDS
WILL DECREASE AS HIGH PRESSURE FULLY TAKES CONTROL TUESDAY. AS HIGH
PRESSURE BUILDS OVER THE AREA, TEMPERATURES WILL TREND MUCH WARMER.
AFTERNOON TEMPERATURES WILL BE NEAR OR SLIGHTLY ABOVE NORMAL MONDAY
BEFORE LIKELY CLIMBING 10 DEGREES ABOVE NORMAL FOR THE LATTER HALF
OF THE WEEK. MODELS ARE IN FAIRLY GOOD AGREEMENT MOVING A LOW
PRESSURE SYSTEM THROUGH THE PACIFIC NORTHWEST LATE THURSDAY THROUGH
FRIDAY, BUT DIFFER ON THE STRENGTH. WE MAY SEE SOME BREEZY SOUTHWEST
WINDS LATE IN THE PERIOD.

&&

.AVIATION...FOR MCCARRAN...GENERALLY SOUTHERLY WINDS EXPECTED ONCE
AGAIN TODAY WITH SPEEDS IN THE 15-20 KT RANGE AFTER 16Z. GUSTS MAY
REACH UP TO 30 KTS AT TIMES. LESS SHOWER ACTIVITY EXPECTED TODAY
THOUGH SOME AFTERNOON CUMULUS AND SCT-BKN MID LEVEL CLOUD COVER IS
LIKELY BY THE MID AFTERNOON.  WIND SPEEDS AFTER SUNSET WILL
GRADUALLY EASE INTO THE 12-15KT RANGE WITH GUSTS TO 20 KTS
OVERNIGHT.

.FOR THE REST OF SOUTHERN NEVADA...NORTHWEST ARIZONA...AND SOUTHEAST
CALIFORNIA...BREEZY CONDITIONS EXPECTED ACROSS MUCH OF THE REGION
WITH SOUTHWESTERLY SURFACE WINDS OF 15-20KTS AND GUSTS TO 30KTS
EXPECTED ACORSS MUCH OF THE AREA. STRONGER WINDS ARE EXPECTED ACROSS
THE WESTERN MOJAVE DESERT NEAR KDAG WHERE SURFACE WINDS OF 25-35KTS
AND GUSTS TO 40KTS ARE EXPECTED WITH AREAS OF BLOWING DUST POSSIBLE.
SHOWER ACTIVITY CAN BE EXPECTED ACROSS THE MOUNTAINS OF INYO
COUNTY... THE SOUTHERN GREAT BASIN...AND NORTHERN MOHAVE COUNTY. SCT-
BKN CUMULUS WITH BASES OF 7-10K EXPECTED ELSEHWERE.

 &&

.SPOTTER INFORMATION STATEMENT...SPOTTERS SHOULD REPORT ACCORDING TO
STANDARD OPERATING PROCEDURES.
&&

$$

SHORT TERM/AVIATION...OUTLER
LONG TERM...PADDOCK

FOR MORE FORECAST INFORMATION...SEE US ON OUR WEBPAGE:

HTTP://WEATHER.GOV/LASVEGAS OR FOLLOW US ON FACEBOOK AND TWITTER





000
FXUS65 KVEF 240922
AFDVEF

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
220 AM PDT FRI APR 24 2015

.SYNOPSIS...UNSETTLED WEATHER WILL CONTINUE THROUGH SATURDAY WITH
COOL TEMPERATURES WITH SCATTERED SHOWERS AND THUNDERSTORMS IN THE
FORECAST. GREATEST CHANCES FOR RAINFALL ARE EXPECTED ACROSS THE
SOUTHERN GREAT BASIN AND NORTHWEST ARIZONA. IN ADDITION...STRONG
WINDS WILL DEVELOP ACROSS THE WESTERN MOJAVE DESERT FRIDAY AND
BECOME QUITE STRONG ON SATURDAY RESULTING IN AREAS OF BLOWING DUST.
WARMER AND DRIER CONDITIONS ARE EXPECTED NEXT WEEK.

&&

.SHORT TERM...THROUGH SATURDAY NIGHT.

VERY ACTIVE SPRING WEATHER IN PLAY AT THE MOMENT WITH A SERIES OF
DISTURBANCES INFLUENCING THE REGION. NEXT SHORTWAVE TO AFFECT THE
REGION WILL MOVE ACROSS NEVADA TODAY INITIATING ANOTHER ROUND OF
SHOWERS AND ISOLATED THUNDERSTORMS MAINLY FOR OUR SOUTHERN GREAT
BASIN ZONES. SOUTH OF THE GREAT BASIN...A FEW STRAY SHOWERS OR
ISOLATED THUNDERSTORMS WILL BE POSSIBLE BUT INSTABILITY AND MOISTURE
WILL BE A LIMITING FACTOR. ACROSS THE GREAT BASIN...FAIRLY STRONG
FRONTOGENISIS ASSOCIATED WITH THE SHORTWAVE WILL RESULT IN
CONSIDERABLE SHOWER COVERAGE FOR OUR NORTHERN ZONES WHICH MAY PICK
UP BETWEEN A TENTH AND A QUARTER OF INCH OF RAIN BY LATE FRIDAY
EVENING.  MEANWHILE FURTHER SOUTH...INCREASINGLY TIGHT PRESSURE
GRADIENTS WILL RESULT IN GUSTY WINDS DEVELOPING ACROSS SAN
BERNARDINO COUNTY. AREAS OF BLOWING DUST ARE POSSIBLE IN ADDITION TO
STRONG CROSSWINDS ON NORTH-SOUTH ORIENTED ROADWAYS.

ON SATURDAY...THE FINAL AND STRONGEST TROUGH OF THE SERIES WEVE
OBSERVED THIS WEEK WILL DIVE INTO THE REGION. MODEL TRENDS HAVE
CONSISTENTLY BEEN DEVELOPING THIS SYSTEM FURTHER AND FURTHER WEST
WHICH RESULTS IN LARGER IMPACTS TO OUR REGION. NOW THE STRONGEST
FORCING ASSOCIATED WITH THE TROUGH TRACKS RIGHT ACROSS OUR FORECAST
AREA AND MAY SUPPORT SCATTERED SHOWER DEVELOPMENT ALMOST ANYWHERE.
THE GREATEST CHANCES FOR RAINFALL STILL APPEAR TO BE ACROSS THE
SOUTHERN GREAT BASIN...BUT WITH THE CORE OF THE SHORTWAVE ENERGY
TRACKING ACROSS EASTERN CALIFORNIA AND INTO ARIZONA...FORCING AND
INSTABILITY MAY BE ENOUGH TO GENERATE SOME SHOWERS AND THUNDERSTORMS
ACROSS THE MOJAVE DESERT. A LOOK AT THE FORECAST SOUNDINGS FOR LAS
VEGAS ON SATURDAY ALSO SUPPORT SHOWER ACTIVITY. FOR THESE REASONS
...I INCREASED POPS INTO THE SLIGHT CHANCE OR GREATER CATEGORY AREA
WIDE FOR SATURDAY.

THE OTHER CONCERN SATURDAY WILL BE WINDS. VERY STRONG WINDS AS A
RESULT OF RAPID HEIGHT FALLS AND A STRONG PRESSURE GRADIENT ARE
BEING INDICATED BY MOS GUIDANCE AND HIGH RES MODEL FORECASTS.
GUIDANCE SUGGESTS WIND GUSTS IN THE WESTERN MOJAVE DESERT OF 55 TO
65 MPH. THIS IS WELL INTO THE HIGH WIND THRESHOLD AND WILL
UNDOUBTEDLY LEAD TO BLOWING DUST CONCERNS AS WELL AS DANGEROUS
TRAVEL CONDITIONS FOR HIGH PROFILE VEHICLES. STRONG WINDS MAY EXTEND
EAST ACROSS EASTERN SAN BERNARDINO COUNTY AND SOUTHERN CLARK COUNTY
AS WELL WHICH WILL NEED TO BE MONITORED FOR ADDITIONAL WIND
HEADLINES.

BY SATURDAY EVENING THE TROUGH WILL SHIFT EAST WITH PRECIPITATION
MOVING INTO ARIZONA AND AWAY FROM OUR AREA. WINDS WILL GRADUALLY
EASE OVERNIGHT AS WELL.

.LONG TERM...SUNDAY MORNING THROUGH THURSDAY.

AT THE START OF THE LONG TERM PERIOD THE DEEP TROUGH THAT WILL PASS
THROUGH OUR AREA SATURDAY WILL BE JUST EAST OF THE NEVADA-UTAH
BORDER. THE MAJORITY OF THE PRECIPITATION WILL BE EAST OF OUR AREA
SUNDAY, WITH JUST A 20-30 PERCENT CHANCE OF SHOWERS ACROSS EASTERN
MOHAVE AND LINCOLN COUNTIES FOR MAINLY THE FIRST HALF OF THE DAY.
THE BIGGER STORY WILL BE WIND. EXPECT GUSTY NORTH WINDS OF 20-30
MPH, WITH HIGHER GUSTS LIKELY ALONG THE COLORADO RIVER VALLEY. AS
MENTIONED IN THE PREVIOUS DISCUSSION, WIND HEADLINE PRODUCTS MAY BE
NEEDED. SUNDAY AFTERNOON TEMPERATURES WILL CONTINUE TO RUN BELOW
NORMAL FOR THIS TIME OF YEAR.

DRY CONDITIONS WILL PREVAIL FOR THE REMAINDER OF THE FORECAST
PERIOD. GUSTY NORTH WINDS WILL LINGER INTO MONDAY, BUT WIND SPEEDS
WILL DECREASE AS HIGH PRESSURE FULLY TAKES CONTROL TUESDAY. AS HIGH
PRESSURE BUILDS OVER THE AREA, TEMPERATURES WILL TREND MUCH WARMER.
AFTERNOON TEMPERATURES WILL BE NEAR OR SLIGHTLY ABOVE NORMAL MONDAY
BEFORE LIKELY CLIMBING 10 DEGREES ABOVE NORMAL FOR THE LATTER HALF
OF THE WEEK. MODELS ARE IN FAIRLY GOOD AGREEMENT MOVING A LOW
PRESSURE SYSTEM THROUGH THE PACIFIC NORTHWEST LATE THURSDAY THROUGH
FRIDAY, BUT DIFFER ON THE STRENGTH. WE MAY SEE SOME BREEZY SOUTHWEST
WINDS LATE IN THE PERIOD.

&&

.AVIATION...FOR MCCARRAN...GENERALLY SOUTHERLY WINDS EXPECTED ONCE
AGAIN TODAY WITH SPEEDS IN THE 15-20 KT RANGE AFTER 16Z. GUSTS MAY
REACH UP TO 30 KTS AT TIMES. LESS SHOWER ACTIVITY EXPECTED TODAY
THOUGH SOME AFTERNOON CUMULUS AND SCT-BKN MID LEVEL CLOUD COVER IS
LIKELY BY THE MID AFTERNOON.  WIND SPEEDS AFTER SUNSET WILL
GRADUALLY EASE INTO THE 12-15KT RANGE WITH GUSTS TO 20 KTS
OVERNIGHT.

.FOR THE REST OF SOUTHERN NEVADA...NORTHWEST ARIZONA...AND SOUTHEAST
CALIFORNIA...BREEZY CONDITIONS EXPECTED ACROSS MUCH OF THE REGION
WITH SOUTHWESTERLY SURFACE WINDS OF 15-20KTS AND GUSTS TO 30KTS
EXPECTED ACORSS MUCH OF THE AREA. STRONGER WINDS ARE EXPECTED ACROSS
THE WESTERN MOJAVE DESERT NEAR KDAG WHERE SURFACE WINDS OF 25-35KTS
AND GUSTS TO 40KTS ARE EXPECTED WITH AREAS OF BLOWING DUST POSSIBLE.
SHOWER ACTIVITY CAN BE EXPECTED ACROSS THE MOUNTAINS OF INYO
COUNTY... THE SOUTHERN GREAT BASIN...AND NORTHERN MOHAVE COUNTY. SCT-
BKN CUMULUS WITH BASES OF 7-10K EXPECTED ELSEHWERE.

 &&

.SPOTTER INFORMATION STATEMENT...SPOTTERS SHOULD REPORT ACCORDING TO
STANDARD OPERATING PROCEDURES.
&&

$$

SHORT TERM/AVIATION...OUTLER
LONG TERM...PADDOCK

FOR MORE FORECAST INFORMATION...SEE US ON OUR WEBPAGE:

HTTP://WEATHER.GOV/LASVEGAS OR FOLLOW US ON FACEBOOK AND TWITTER




000
FXUS65 KVEF 240922
AFDVEF

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
220 AM PDT FRI APR 24 2015

.SYNOPSIS...UNSETTLED WEATHER WILL CONTINUE THROUGH SATURDAY WITH
COOL TEMPERATURES WITH SCATTERED SHOWERS AND THUNDERSTORMS IN THE
FORECAST. GREATEST CHANCES FOR RAINFALL ARE EXPECTED ACROSS THE
SOUTHERN GREAT BASIN AND NORTHWEST ARIZONA. IN ADDITION...STRONG
WINDS WILL DEVELOP ACROSS THE WESTERN MOJAVE DESERT FRIDAY AND
BECOME QUITE STRONG ON SATURDAY RESULTING IN AREAS OF BLOWING DUST.
WARMER AND DRIER CONDITIONS ARE EXPECTED NEXT WEEK.

&&

.SHORT TERM...THROUGH SATURDAY NIGHT.

VERY ACTIVE SPRING WEATHER IN PLAY AT THE MOMENT WITH A SERIES OF
DISTURBANCES INFLUENCING THE REGION. NEXT SHORTWAVE TO AFFECT THE
REGION WILL MOVE ACROSS NEVADA TODAY INITIATING ANOTHER ROUND OF
SHOWERS AND ISOLATED THUNDERSTORMS MAINLY FOR OUR SOUTHERN GREAT
BASIN ZONES. SOUTH OF THE GREAT BASIN...A FEW STRAY SHOWERS OR
ISOLATED THUNDERSTORMS WILL BE POSSIBLE BUT INSTABILITY AND MOISTURE
WILL BE A LIMITING FACTOR. ACROSS THE GREAT BASIN...FAIRLY STRONG
FRONTOGENISIS ASSOCIATED WITH THE SHORTWAVE WILL RESULT IN
CONSIDERABLE SHOWER COVERAGE FOR OUR NORTHERN ZONES WHICH MAY PICK
UP BETWEEN A TENTH AND A QUARTER OF INCH OF RAIN BY LATE FRIDAY
EVENING.  MEANWHILE FURTHER SOUTH...INCREASINGLY TIGHT PRESSURE
GRADIENTS WILL RESULT IN GUSTY WINDS DEVELOPING ACROSS SAN
BERNARDINO COUNTY. AREAS OF BLOWING DUST ARE POSSIBLE IN ADDITION TO
STRONG CROSSWINDS ON NORTH-SOUTH ORIENTED ROADWAYS.

ON SATURDAY...THE FINAL AND STRONGEST TROUGH OF THE SERIES WEVE
OBSERVED THIS WEEK WILL DIVE INTO THE REGION. MODEL TRENDS HAVE
CONSISTENTLY BEEN DEVELOPING THIS SYSTEM FURTHER AND FURTHER WEST
WHICH RESULTS IN LARGER IMPACTS TO OUR REGION. NOW THE STRONGEST
FORCING ASSOCIATED WITH THE TROUGH TRACKS RIGHT ACROSS OUR FORECAST
AREA AND MAY SUPPORT SCATTERED SHOWER DEVELOPMENT ALMOST ANYWHERE.
THE GREATEST CHANCES FOR RAINFALL STILL APPEAR TO BE ACROSS THE
SOUTHERN GREAT BASIN...BUT WITH THE CORE OF THE SHORTWAVE ENERGY
TRACKING ACROSS EASTERN CALIFORNIA AND INTO ARIZONA...FORCING AND
INSTABILITY MAY BE ENOUGH TO GENERATE SOME SHOWERS AND THUNDERSTORMS
ACROSS THE MOJAVE DESERT. A LOOK AT THE FORECAST SOUNDINGS FOR LAS
VEGAS ON SATURDAY ALSO SUPPORT SHOWER ACTIVITY. FOR THESE REASONS
...I INCREASED POPS INTO THE SLIGHT CHANCE OR GREATER CATEGORY AREA
WIDE FOR SATURDAY.

THE OTHER CONCERN SATURDAY WILL BE WINDS. VERY STRONG WINDS AS A
RESULT OF RAPID HEIGHT FALLS AND A STRONG PRESSURE GRADIENT ARE
BEING INDICATED BY MOS GUIDANCE AND HIGH RES MODEL FORECASTS.
GUIDANCE SUGGESTS WIND GUSTS IN THE WESTERN MOJAVE DESERT OF 55 TO
65 MPH. THIS IS WELL INTO THE HIGH WIND THRESHOLD AND WILL
UNDOUBTEDLY LEAD TO BLOWING DUST CONCERNS AS WELL AS DANGEROUS
TRAVEL CONDITIONS FOR HIGH PROFILE VEHICLES. STRONG WINDS MAY EXTEND
EAST ACROSS EASTERN SAN BERNARDINO COUNTY AND SOUTHERN CLARK COUNTY
AS WELL WHICH WILL NEED TO BE MONITORED FOR ADDITIONAL WIND
HEADLINES.

BY SATURDAY EVENING THE TROUGH WILL SHIFT EAST WITH PRECIPITATION
MOVING INTO ARIZONA AND AWAY FROM OUR AREA. WINDS WILL GRADUALLY
EASE OVERNIGHT AS WELL.

.LONG TERM...SUNDAY MORNING THROUGH THURSDAY.

AT THE START OF THE LONG TERM PERIOD THE DEEP TROUGH THAT WILL PASS
THROUGH OUR AREA SATURDAY WILL BE JUST EAST OF THE NEVADA-UTAH
BORDER. THE MAJORITY OF THE PRECIPITATION WILL BE EAST OF OUR AREA
SUNDAY, WITH JUST A 20-30 PERCENT CHANCE OF SHOWERS ACROSS EASTERN
MOHAVE AND LINCOLN COUNTIES FOR MAINLY THE FIRST HALF OF THE DAY.
THE BIGGER STORY WILL BE WIND. EXPECT GUSTY NORTH WINDS OF 20-30
MPH, WITH HIGHER GUSTS LIKELY ALONG THE COLORADO RIVER VALLEY. AS
MENTIONED IN THE PREVIOUS DISCUSSION, WIND HEADLINE PRODUCTS MAY BE
NEEDED. SUNDAY AFTERNOON TEMPERATURES WILL CONTINUE TO RUN BELOW
NORMAL FOR THIS TIME OF YEAR.

DRY CONDITIONS WILL PREVAIL FOR THE REMAINDER OF THE FORECAST
PERIOD. GUSTY NORTH WINDS WILL LINGER INTO MONDAY, BUT WIND SPEEDS
WILL DECREASE AS HIGH PRESSURE FULLY TAKES CONTROL TUESDAY. AS HIGH
PRESSURE BUILDS OVER THE AREA, TEMPERATURES WILL TREND MUCH WARMER.
AFTERNOON TEMPERATURES WILL BE NEAR OR SLIGHTLY ABOVE NORMAL MONDAY
BEFORE LIKELY CLIMBING 10 DEGREES ABOVE NORMAL FOR THE LATTER HALF
OF THE WEEK. MODELS ARE IN FAIRLY GOOD AGREEMENT MOVING A LOW
PRESSURE SYSTEM THROUGH THE PACIFIC NORTHWEST LATE THURSDAY THROUGH
FRIDAY, BUT DIFFER ON THE STRENGTH. WE MAY SEE SOME BREEZY SOUTHWEST
WINDS LATE IN THE PERIOD.

&&

.AVIATION...FOR MCCARRAN...GENERALLY SOUTHERLY WINDS EXPECTED ONCE
AGAIN TODAY WITH SPEEDS IN THE 15-20 KT RANGE AFTER 16Z. GUSTS MAY
REACH UP TO 30 KTS AT TIMES. LESS SHOWER ACTIVITY EXPECTED TODAY
THOUGH SOME AFTERNOON CUMULUS AND SCT-BKN MID LEVEL CLOUD COVER IS
LIKELY BY THE MID AFTERNOON.  WIND SPEEDS AFTER SUNSET WILL
GRADUALLY EASE INTO THE 12-15KT RANGE WITH GUSTS TO 20 KTS
OVERNIGHT.

.FOR THE REST OF SOUTHERN NEVADA...NORTHWEST ARIZONA...AND SOUTHEAST
CALIFORNIA...BREEZY CONDITIONS EXPECTED ACROSS MUCH OF THE REGION
WITH SOUTHWESTERLY SURFACE WINDS OF 15-20KTS AND GUSTS TO 30KTS
EXPECTED ACORSS MUCH OF THE AREA. STRONGER WINDS ARE EXPECTED ACROSS
THE WESTERN MOJAVE DESERT NEAR KDAG WHERE SURFACE WINDS OF 25-35KTS
AND GUSTS TO 40KTS ARE EXPECTED WITH AREAS OF BLOWING DUST POSSIBLE.
SHOWER ACTIVITY CAN BE EXPECTED ACROSS THE MOUNTAINS OF INYO
COUNTY... THE SOUTHERN GREAT BASIN...AND NORTHERN MOHAVE COUNTY. SCT-
BKN CUMULUS WITH BASES OF 7-10K EXPECTED ELSEHWERE.

 &&

.SPOTTER INFORMATION STATEMENT...SPOTTERS SHOULD REPORT ACCORDING TO
STANDARD OPERATING PROCEDURES.
&&

$$

SHORT TERM/AVIATION...OUTLER
LONG TERM...PADDOCK

FOR MORE FORECAST INFORMATION...SEE US ON OUR WEBPAGE:

HTTP://WEATHER.GOV/LASVEGAS OR FOLLOW US ON FACEBOOK AND TWITTER





000
FXUS65 KVEF 240329
AFDVEF

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
830 PM PDT THU APR 23 2015

.SYNOPSIS...A SERIES OF UPPER LEVEL DISTURBANCES WILL KEEP
RELATIVELY COOL WEATHER WITH ISOLATED TO SCATTERED SHOWERS AND
THUNDERSTORMS IN THE FORECAST THROUGH SATURDAY NIGHT. AREAS OF GUSTY
SOUTHWEST WINDS ARE EXPECTED THROUGH SATURDAY WITH GUSTY NORTH WINDS
DEVELOPING SATURDAY NIGHT AND SUNDAY. HIGH PRESSURE WILL BUILD IN BY
EARLY NEXT WEEK LEADING TO DRY CONDITIONS AND A WARMING TREND.
&&

.UPDATE...SCATTERED SHOWER AND THUNDERSTORM ACTIVITY IS WINDING DOWN
THIS EVENING WITH NO NEW LIGHTNING STRIKES IN OUR FORECAST AREA IN
THE PAST HOUR.  RADAR AND SATELLITE TRENDS PAINT A PICTURE OF DRYING
AND STABILIZING CONDITIONS AND I HAVE GONE AHEAD AND UPDATED THE
GRIDS TO STRIP DOWN POPS ACROSS MUCH OF THE FORECAST AREA AND REDUCE
SKY COVER. STILL MAINTAINED SOME SLIGHT CHANCES ACROSS OUR SOUTHERN
GREAT BASIN ZONES WHERE THE HRRR MODEL INSISTS ON SOME LINGERING
SHOWER ACTIVITY OVERNIGHT BUT OTHERWISE THINGS ARE QUICKLY SETTLING
DOWN.

-OUTLER-

&&

.SHORT TERM...THROUGH SATURDAY NIGHT.

BASICALLY RANDOM CONVECTION DEVELOPED ABOUT AS EXPECTED TODAY
UNDERNEATH THE UPPER LOW OVER THE AREA. A FEW STORMS HAVE ACTUALLY
GENERATED WETTING RAIN BUT THOSE HAVE BEEN SPOTTY. THIS ACTIVITY
WILL CONTINUE THROUGH THE EARLY EVENING BEFORE DECREASE TO JUST A
SLIGHT CHANCE OF SHOWERS OVERNIGHT AS THE LOW/TROUGH MOVES EAST OF
THE AREA. THE NEXT SHORTWAVE WILL MOVE ACROSS THE AREA LATE TONIGHT
THROUGH FRIDAY NIGHT BRINGING A CHANCE OF SHOWERS AND THUNDERSTORMS
TO INYO COUNTY IN CALIFORNIA AND JUST ABOUT ALL OF OUR SOUTHERN
NEVADA AND NORTHWEST ARIZONA AREA. THE BEST PRECIPITATION CHANCES
WILL BE ACROSS THE SOUTHERN GREAT BASIN...CLOSE TO THE MAINLY TROUGH
ENERGY. NORTHERN LINCOLN COUNTY MAY ACTUALLY GET A DECENT AMOUNT OF
RAINFALL WITH THIS SYSTEM FRIDAY AFTERNOON AND EVENING. THE FINAL
AND POSSIBLY STRONGEST TROUGH IN THE SERIES WILL DROP ACROSS NEVADA
INTO ARIZONA SATURDAY AND SATURDAY NIGHT BRINGING CONTINUE
PRECIPITATION CHANCES ACROSS MUCH OF THE AREA EXCEPT PERHAPS SAN
BERNARDINO COUNTY. WE WILL PROBABLY SEE PRETTY GOOD FRONTOGENESIS
WITH THIS SYSTEM...RESULTING IN ANOTHER ROUND OF DECENT
PRECIPITATION OVER LINCOLN COUNTY SATURDAY AFTERNOON. THIS BAND MAY
EVEN PRODUCE DECENT PRECIPITATION ACROSS PORTIONS OF MOHAVE COUNTY
SATURDAY NIGHT WHILE THE WESTERN PART OF THE FORECAST AREA STARTS TO
CLEAR OUT.

WINDS WILL BE A FACTOR IN SOME AREAS THE NEXT COUPLE OF DAY. BREEZY
SOUTHWEST WINDS WILL DEVELOP ACROSS THE MOJAVE DESERT FRIDAY WITH HI-
RES MODELS AND MOS GUIDANCE INDICATING ADVISORY LEVEL WINDS IN THE
WESTERN MOJAVE DESERT OF SAN BERNARDINO COUNTY. THE SAME GUIDANCE
INDICATES EVEN STRONGER WINDS SATURDAY THERE WITH MOS SHOWING
POTENTIAL FOR HIGH WIND CRITERIA BEING REACHED. THIS MAY BE A BIT
OVERDONE HOWEVER. FOR NOW I DECIDED TO GO WITH A WIND ADVISORY FOR
THAT ZONE BEGINNING 11 AM FRIDAY AND RUNNING THROUGH 11 PM SATURDAY.
THERE MAY BE A BIT OF A LULL FRIDAY NIGHT BUT TO KEEP THINGS FROM
GETTING CONFUSING I JUST RAN THE ADVISORY FOR THE WHOLE TIME. GUSTY
NORTH/NORTHWEST WINDS WILL BEGIN TO DEVELOP BEHIND A COLD FRONT
SATURDAY NIGHT AND THERE IS POTENTIAL FOR ADVISORY LEVEL GUSTS IN
PLACES. TEMPERATURE WILL BE A BIT ON THE COOL SIDE DURING THE SHORT
TERM DUE TO THESE UPPER LEVEL DISTURBANCES...CLOUD COVER AND
SHOWERS IN THE AREA.

.LONG TERM...SUNDAY MORNING THROUGH THURSDAY.

DEEP TROUGH WILL BE LOCATED JUST EAST OF THE NEVADA/UTAH BORDER WITH
GUSTY NORTH WINDS EXPECTED ACROSS THE ENTIRE AREA SUNDAY. MOST AREAS
WILL LIKELY SEE WINDS IN THE 20-30 MPH RANGE...BUT LOCATIONS DOWN
THE COLORADO RIVER WILL LIKELY BE HIGHER AND WIND ADVISORIES/LAKE
WIND ADVISORIES MAY BE NEEDED. MUCH OF THE PRECIPITATION IS EXPECTED
TO BE EAST OF THE AREA BY SUNDAY MORNING...BUT A FEW ISOLATED
SHOWERS MAY STILL BE POSSIBLE ALONG THE UTAH BORDER ALONG WITH THE
THE FAR EASTERN AREAS OF MOHAVE COUNTY. BY SUNDAY AFTERNOON THE
TROUGH IS EXPECTED TO BE FAR ENOUGH EAST THAT ANY PRECIPITATION WILL
BE EAST OF THE AREA. ALTHOUGH ITS EXPECTED TO BE DRY AREAWIDE MONDAY
WE WILL STILL HAVE ENOUGH INFLUENCE FROM THE LOW TO KEEP GUSTY NORTH
TO NORTHEAST WINDS OVER THE AREA...ESPECIALLY DOWN THE RIVER. HIGH
PRESSURE WILL BUILD OVER THE AREA TUESDAY THROUGH THURSDAY LEADING
TO WARMING TEMPERATURES AND MUCH LIGHTER WINDS. TEMPERATURES ON
SUNDAY ARE STILL EXPECTED TO BE A FEW DEGREES BELOW NORMAL...BUT ARE
EXPECTED TO CLIMB TO AROUND NORMAL MONDAY. TEMPERATURES ON TUESDAY
ARE FORECAST TO JUMP SEVERAL DEGREES AND MAY BE CLOSE TO 10-15
DEGREES ABOVE NORMAL BY FRIDAY. &&

.AVIATION...FOR MCCARRAN...WINDS ARE EXPECTED TO BE MAINLY FROM THE
SOUTH AROUND 10 KNOTS THROUGH FRIDAY MORNING...INCREASING TO AROUND
15 KNOTS WITH GUSTS TO 25-30 KNOTS FRIDAY AFTERNOON.
HOWEVER...ISOLATED SHOWERS AND THUNDERSTORMS THROUGH THIS EVENING
WILL LIKELY CAUSE ERRATIC WINDS AT TIME. CLOUD BASES WITH THESE
SHOWERS WILL MAINLY BE IN THE 9-10KFT RANGE. MORE SHOWERS COULD
DEVELOP IN THE AREA AGAIN FRIDAY AFTERNOON.

.FOR THE REST OF SOUTHERN NEVADA...NORTHWEST ARIZONA...AND SOUTHEAST
CALIFORNIA...UNSETTLED WEATHER CONDITIONS EXPECTED WITH SCATTERED
SHOWERS AND ISOLATED THUNDERSTORMS EXPECTED. LOCALLY STRONG UPDRAFTS
AND CONVECTIVE TURBULENCE POSSIBLE NEAR SHOWER ACTIVITY AS WELL AS
GUSTY AND ERRATIC SURFACE WINDS. CLOUD BASES EXPECTED TO BE IN THE 7
TO 10K FT RANGE. SHOWERS AND THUNDERSTORMS WILL GRADUALLY DIMINISH
IN THE LATE EVENING HOURS THOUGH A FEW STRAY SHOWERS MAY PERSIST
INTO THE NIGHT. MORE SHOWERS AND THUNDERSTORMS WILL DEVELOP AGAIN
FRIDAY AFTERNOON EXCEPT IN SAN BERNARDINO COUNTY. WINDS MAINLY SOUTH-
SOUTHWEST 10-15 KNOTS WITH GUSTS TO 25 KNOTS THROUGH FRIDAY MORNING.
WIND SPEEDS WILL INCREASE TO 15-25 KNOTS WITH GUSTS 30 TO 35 KNOTS
FRIDAY AFTERNOON. GUSTS TO 40 KNOTS ARE POSSIBLE IN WESTERN SAN
BERNARDINO COUNTY.
&&

.SPOTTER INFORMATION STATEMENT...SPOTTERS SHOULD REPORT ACCORDING TO
STANDARD OPERATING PROCEDURES.
&&

$$

SHORT TERM/AVIATION...HARRISON
LONG TERM...GORELOW

FOR MORE FORECAST INFORMATION...SEE US ON OUR WEBPAGE:

HTTP://WEATHER.GOV/LASVEGAS OR FOLLOW US ON FACEBOOK AND TWITTER





000
FXUS65 KVEF 240329
AFDVEF

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
830 PM PDT THU APR 23 2015

.SYNOPSIS...A SERIES OF UPPER LEVEL DISTURBANCES WILL KEEP
RELATIVELY COOL WEATHER WITH ISOLATED TO SCATTERED SHOWERS AND
THUNDERSTORMS IN THE FORECAST THROUGH SATURDAY NIGHT. AREAS OF GUSTY
SOUTHWEST WINDS ARE EXPECTED THROUGH SATURDAY WITH GUSTY NORTH WINDS
DEVELOPING SATURDAY NIGHT AND SUNDAY. HIGH PRESSURE WILL BUILD IN BY
EARLY NEXT WEEK LEADING TO DRY CONDITIONS AND A WARMING TREND.
&&

.UPDATE...SCATTERED SHOWER AND THUNDERSTORM ACTIVITY IS WINDING DOWN
THIS EVENING WITH NO NEW LIGHTNING STRIKES IN OUR FORECAST AREA IN
THE PAST HOUR.  RADAR AND SATELLITE TRENDS PAINT A PICTURE OF DRYING
AND STABILIZING CONDITIONS AND I HAVE GONE AHEAD AND UPDATED THE
GRIDS TO STRIP DOWN POPS ACROSS MUCH OF THE FORECAST AREA AND REDUCE
SKY COVER. STILL MAINTAINED SOME SLIGHT CHANCES ACROSS OUR SOUTHERN
GREAT BASIN ZONES WHERE THE HRRR MODEL INSISTS ON SOME LINGERING
SHOWER ACTIVITY OVERNIGHT BUT OTHERWISE THINGS ARE QUICKLY SETTLING
DOWN.

-OUTLER-

&&

.SHORT TERM...THROUGH SATURDAY NIGHT.

BASICALLY RANDOM CONVECTION DEVELOPED ABOUT AS EXPECTED TODAY
UNDERNEATH THE UPPER LOW OVER THE AREA. A FEW STORMS HAVE ACTUALLY
GENERATED WETTING RAIN BUT THOSE HAVE BEEN SPOTTY. THIS ACTIVITY
WILL CONTINUE THROUGH THE EARLY EVENING BEFORE DECREASE TO JUST A
SLIGHT CHANCE OF SHOWERS OVERNIGHT AS THE LOW/TROUGH MOVES EAST OF
THE AREA. THE NEXT SHORTWAVE WILL MOVE ACROSS THE AREA LATE TONIGHT
THROUGH FRIDAY NIGHT BRINGING A CHANCE OF SHOWERS AND THUNDERSTORMS
TO INYO COUNTY IN CALIFORNIA AND JUST ABOUT ALL OF OUR SOUTHERN
NEVADA AND NORTHWEST ARIZONA AREA. THE BEST PRECIPITATION CHANCES
WILL BE ACROSS THE SOUTHERN GREAT BASIN...CLOSE TO THE MAINLY TROUGH
ENERGY. NORTHERN LINCOLN COUNTY MAY ACTUALLY GET A DECENT AMOUNT OF
RAINFALL WITH THIS SYSTEM FRIDAY AFTERNOON AND EVENING. THE FINAL
AND POSSIBLY STRONGEST TROUGH IN THE SERIES WILL DROP ACROSS NEVADA
INTO ARIZONA SATURDAY AND SATURDAY NIGHT BRINGING CONTINUE
PRECIPITATION CHANCES ACROSS MUCH OF THE AREA EXCEPT PERHAPS SAN
BERNARDINO COUNTY. WE WILL PROBABLY SEE PRETTY GOOD FRONTOGENESIS
WITH THIS SYSTEM...RESULTING IN ANOTHER ROUND OF DECENT
PRECIPITATION OVER LINCOLN COUNTY SATURDAY AFTERNOON. THIS BAND MAY
EVEN PRODUCE DECENT PRECIPITATION ACROSS PORTIONS OF MOHAVE COUNTY
SATURDAY NIGHT WHILE THE WESTERN PART OF THE FORECAST AREA STARTS TO
CLEAR OUT.

WINDS WILL BE A FACTOR IN SOME AREAS THE NEXT COUPLE OF DAY. BREEZY
SOUTHWEST WINDS WILL DEVELOP ACROSS THE MOJAVE DESERT FRIDAY WITH HI-
RES MODELS AND MOS GUIDANCE INDICATING ADVISORY LEVEL WINDS IN THE
WESTERN MOJAVE DESERT OF SAN BERNARDINO COUNTY. THE SAME GUIDANCE
INDICATES EVEN STRONGER WINDS SATURDAY THERE WITH MOS SHOWING
POTENTIAL FOR HIGH WIND CRITERIA BEING REACHED. THIS MAY BE A BIT
OVERDONE HOWEVER. FOR NOW I DECIDED TO GO WITH A WIND ADVISORY FOR
THAT ZONE BEGINNING 11 AM FRIDAY AND RUNNING THROUGH 11 PM SATURDAY.
THERE MAY BE A BIT OF A LULL FRIDAY NIGHT BUT TO KEEP THINGS FROM
GETTING CONFUSING I JUST RAN THE ADVISORY FOR THE WHOLE TIME. GUSTY
NORTH/NORTHWEST WINDS WILL BEGIN TO DEVELOP BEHIND A COLD FRONT
SATURDAY NIGHT AND THERE IS POTENTIAL FOR ADVISORY LEVEL GUSTS IN
PLACES. TEMPERATURE WILL BE A BIT ON THE COOL SIDE DURING THE SHORT
TERM DUE TO THESE UPPER LEVEL DISTURBANCES...CLOUD COVER AND
SHOWERS IN THE AREA.

.LONG TERM...SUNDAY MORNING THROUGH THURSDAY.

DEEP TROUGH WILL BE LOCATED JUST EAST OF THE NEVADA/UTAH BORDER WITH
GUSTY NORTH WINDS EXPECTED ACROSS THE ENTIRE AREA SUNDAY. MOST AREAS
WILL LIKELY SEE WINDS IN THE 20-30 MPH RANGE...BUT LOCATIONS DOWN
THE COLORADO RIVER WILL LIKELY BE HIGHER AND WIND ADVISORIES/LAKE
WIND ADVISORIES MAY BE NEEDED. MUCH OF THE PRECIPITATION IS EXPECTED
TO BE EAST OF THE AREA BY SUNDAY MORNING...BUT A FEW ISOLATED
SHOWERS MAY STILL BE POSSIBLE ALONG THE UTAH BORDER ALONG WITH THE
THE FAR EASTERN AREAS OF MOHAVE COUNTY. BY SUNDAY AFTERNOON THE
TROUGH IS EXPECTED TO BE FAR ENOUGH EAST THAT ANY PRECIPITATION WILL
BE EAST OF THE AREA. ALTHOUGH ITS EXPECTED TO BE DRY AREAWIDE MONDAY
WE WILL STILL HAVE ENOUGH INFLUENCE FROM THE LOW TO KEEP GUSTY NORTH
TO NORTHEAST WINDS OVER THE AREA...ESPECIALLY DOWN THE RIVER. HIGH
PRESSURE WILL BUILD OVER THE AREA TUESDAY THROUGH THURSDAY LEADING
TO WARMING TEMPERATURES AND MUCH LIGHTER WINDS. TEMPERATURES ON
SUNDAY ARE STILL EXPECTED TO BE A FEW DEGREES BELOW NORMAL...BUT ARE
EXPECTED TO CLIMB TO AROUND NORMAL MONDAY. TEMPERATURES ON TUESDAY
ARE FORECAST TO JUMP SEVERAL DEGREES AND MAY BE CLOSE TO 10-15
DEGREES ABOVE NORMAL BY FRIDAY. &&

.AVIATION...FOR MCCARRAN...WINDS ARE EXPECTED TO BE MAINLY FROM THE
SOUTH AROUND 10 KNOTS THROUGH FRIDAY MORNING...INCREASING TO AROUND
15 KNOTS WITH GUSTS TO 25-30 KNOTS FRIDAY AFTERNOON.
HOWEVER...ISOLATED SHOWERS AND THUNDERSTORMS THROUGH THIS EVENING
WILL LIKELY CAUSE ERRATIC WINDS AT TIME. CLOUD BASES WITH THESE
SHOWERS WILL MAINLY BE IN THE 9-10KFT RANGE. MORE SHOWERS COULD
DEVELOP IN THE AREA AGAIN FRIDAY AFTERNOON.

.FOR THE REST OF SOUTHERN NEVADA...NORTHWEST ARIZONA...AND SOUTHEAST
CALIFORNIA...UNSETTLED WEATHER CONDITIONS EXPECTED WITH SCATTERED
SHOWERS AND ISOLATED THUNDERSTORMS EXPECTED. LOCALLY STRONG UPDRAFTS
AND CONVECTIVE TURBULENCE POSSIBLE NEAR SHOWER ACTIVITY AS WELL AS
GUSTY AND ERRATIC SURFACE WINDS. CLOUD BASES EXPECTED TO BE IN THE 7
TO 10K FT RANGE. SHOWERS AND THUNDERSTORMS WILL GRADUALLY DIMINISH
IN THE LATE EVENING HOURS THOUGH A FEW STRAY SHOWERS MAY PERSIST
INTO THE NIGHT. MORE SHOWERS AND THUNDERSTORMS WILL DEVELOP AGAIN
FRIDAY AFTERNOON EXCEPT IN SAN BERNARDINO COUNTY. WINDS MAINLY SOUTH-
SOUTHWEST 10-15 KNOTS WITH GUSTS TO 25 KNOTS THROUGH FRIDAY MORNING.
WIND SPEEDS WILL INCREASE TO 15-25 KNOTS WITH GUSTS 30 TO 35 KNOTS
FRIDAY AFTERNOON. GUSTS TO 40 KNOTS ARE POSSIBLE IN WESTERN SAN
BERNARDINO COUNTY.
&&

.SPOTTER INFORMATION STATEMENT...SPOTTERS SHOULD REPORT ACCORDING TO
STANDARD OPERATING PROCEDURES.
&&

$$

SHORT TERM/AVIATION...HARRISON
LONG TERM...GORELOW

FOR MORE FORECAST INFORMATION...SEE US ON OUR WEBPAGE:

HTTP://WEATHER.GOV/LASVEGAS OR FOLLOW US ON FACEBOOK AND TWITTER




000
FXUS65 KVEF 232207
AFDVEF

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
308 PM PDT THU APR 23 2015

.SYNOPSIS...A SERIES OF UPPER LEVEL DISTURBANCES WILL KEEP
RELATIVELY COOL WEATHER WITH ISOLATED TO SCATTERED SHOWERS AND
THUNDERSTORMS IN THE FORECAST THROUGH SATURDAY NIGHT. AREAS OF GUSTY
SOUTHWEST WINDS ARE EXPECTED THROUGH SATURDAY WITH GUSTY NORTH WINDS
DEVELOPING SATURDAY NIGHT AND SUNDAY. HIGH PRESSURE WILL BUILD IN BY
EARLY NEXT WEEK LEADING TO DRY CONDITIONS AND A WARMING TREND. &&

.SHORT TERM...THROUGH SATURDAY NIGHT.

BASICALLY RANDOM CONVECTION DEVELOPED ABOUT AS EXPECTED TODAY
UNDERNEATH THE UPPER LOW OVER THE AREA. A FEW STORMS HAVE ACTUALLY
GENERATED WETTING RAIN BUT THOSE HAVE BEEN SPOTTY. THIS ACTIVITY
WILL CONTINUE THROUGH THE EARLY EVENING BEFORE DECREASE TO JUST A
SLIGHT CHANCE OF SHOWERS OVERNIGHT AS THE LOW/TROUGH MOVES EAST OF
THE AREA. THE NEXT SHORTWAVE WILL MOVE ACROSS THE AREA LATE TONIGHT
THROUGH FRIDAY NIGHT BRINGING A CHANCE OF SHOWERS AND THUNDERSTORMS
TO INYO COUNTY IN CALIFORNIA AND JUST ABOUT ALL OF OUR SOUTHERN
NEVADA AND NORTHWEST ARIZONA AREA. THE BEST PRECIPITATION CHANCES
WILL BE ACROSS THE SOUTHERN GREAT BASIN...CLOSE TO THE MAINLY TROUGH
ENERGY. NORTHERN LINCOLN COUNTY MAY ACTUALLY GET A DECENT AMOUNT OF
RAINFALL WITH THIS SYSTEM FRIDAY AFTERNOON AND EVENING. THE FINAL
AND POSSIBLY STRONGEST TROUGH IN THE SERIES WILL DROP ACROSS NEVADA
INTO ARIZONA SATURDAY AND SATURDAY NIGHT BRINGING CONTINUE
PRECIPITATION CHANCES ACROSS MUCH OF THE AREA EXCEPT PERHAPS SAN
BERNARDINO COUNTY. WE WILL PROBABLY SEE PRETTY GOOD FRONTOGENESIS
WITH THIS SYSTEM...RESULTING IN ANOTHER ROUND OF DECENT
PRECIPITATION OVER LINCOLN COUNTY SATURDAY AFTERNOON. THIS BAND MAY
EVEN PRODUCE DECENT PRECIPITATION ACROSS PORTIONS OF MOHAVE COUNTY
SATURDAY NIGHT WHILE THE WESTERN PART OF THE FORECAST AREA STARTS TO
CLEAR OUT.

WINDS WILL BE A FACTOR IN SOME AREAS THE NEXT COUPLE OF DAY. BREEZY
SOUTHWEST WINDS WILL DEVELOP ACROSS THE MOJAVE DESERT FRIDAY WITH HI-
RES MODELS AND MOS GUIDANCE INDICATING ADVISORY LEVEL WINDS IN THE
WESTERN MOJAVE DESERT OF SAN BERNARDINO COUNTY. THE SAME GUIDANCE
INDICATES EVEN STRONGER WINDS SATURDAY THERE WITH MOS SHOWING
POTENTIAL FOR HIGH WIND CRITERIA BEING REACHED. THIS MAY BE A BIT
OVERDONE HOWEVER. FOR NOW I DECIDED TO GO WITH A WIND ADVISORY FOR
THAT ZONE BEGINNING 11 AM FRIDAY AND RUNNING THROUGH 11 PM SATURDAY.
THERE MAY BE A BIT OF A LULL FRIDAY NIGHT BUT TO KEEP THINGS FROM
GETTING CONFUSING I JUST RAN THE ADVISORY FOR THE WHOLE TIME. GUSTY
NORTH/NORTHWEST WINDS WILL BEGIN TO DEVELOP BEHIND A COLD FRONT
SATURDAY NIGHT AND THERE IS POTENTIAL FOR ADVISORY LEVEL GUSTS IN
PLACES. TEMPERATURE WILL BE A BIT ON THE COOL SIDE DURING THE SHORT
TERM DUE TO THESE UPPER LEVEL DISTURBANCES...CLOUD COVER AND
SHOWERS IN THE AREA.

.LONG TERM...SUNDAY MORNING THROUGH THURSDAY.

DEEP TROUGH WILL BE LOCATED JUST EAST OF THE NEVADA/UTAH BORDER WITH
GUSTY NORTH WINDS EXPECTED ACROSS THE ENTIRE AREA SUNDAY. MOST AREAS
WILL LIKELY SEE WINDS IN THE 20-30 MPH RANGE...BUT LOCATIONS DOWN
THE COLORADO RIVER WILL LIKELY BE HIGHER AND WIND ADVISORIES/LAKE
WIND ADVISORIES MAY BE NEEDED. MUCH OF THE PRECIPITATION IS EXPECTED
TO BE EAST OF THE AREA BY SUNDAY MORNING...BUT A FEW ISOLATED
SHOWERS MAY STILL BE POSSIBLE ALONG THE UTAH BORDER ALONG WITH THE
THE FAR EASTERN AREAS OF MOHAVE COUNTY. BY SUNDAY AFTERNOON THE
TROUGH IS EXPECTED TO BE FAR ENOUGH EAST THAT ANY PRECIPITATION WILL
BE EAST OF THE AREA. ALTHOUGH ITS EXPECTED TO BE DRY AREAWIDE MONDAY
WE WILL STILL HAVE ENOUGH INFLUENCE FROM THE LOW TO KEEP GUSTY NORTH
TO NORTHEAST WINDS OVER THE AREA...ESPECIALLY DOWN THE RIVER. HIGH
PRESSURE WILL BUILD OVER THE AREA TUESDAY THROUGH THURSDAY LEADING
TO WARMING TEMPERATURES AND MUCH LIGHTER WINDS. TEMPERATURES ON
SUNDAY ARE STILL EXPECTED TO BE A FEW DEGREES BELOW NORMAL...BUT ARE
EXPECTED TO CLIMB TO AROUND NORMAL MONDAY. TEMPERATURES ON TUESDAY
ARE FORECAST TO JUMP SEVERAL DEGREES AND MAY BE CLOSE TO 10-15
DEGREES ABOVE NORMAL BY FRIDAY. &&

.AVIATION...FOR MCCARRAN...WINDS ARE EXPECTED TO BE MAINLY FROM THE
SOUTH AROUND 10 KNOTS THROUGH FRIDAY MORNING...INCREASING TO AROUND
15 KNOTS WITH GUSTS TO 25-30 KNOTS FRIDAY AFTERNOON.
HOWEVER...ISOLATED SHOWERS AND THUNDERSTORMS THROUGH THIS EVENING
WILL LIKELY CAUSE ERRATIC WINDS AT TIME. CLOUD BASES WITH THESE
SHOWERS WILL MAINLY BE IN THE 9-10KFT RANGE. MORE SHOWERS COULD
DEVELOP IN THE AREA AGAIN FRIDAY AFTERNOON.

.FOR THE REST OF SOUTHERN NEVADA...NORTHWEST ARIZONA...AND SOUTHEAST
CALIFORNIA...UNSETTLED WEATHER CONDITIONS EXPECTED WITH SCATTERED
SHOWERS AND ISOLATED THUNDERSTORMS EXPECTED. LOCALLY STRONG UPDRAFTS
AND CONVECTIVE TURBULENCE POSSIBLE NEAR SHOWER ACTIVITY AS WELL AS
GUSTY AND ERRATIC SURFACE WINDS. CLOUD BASES EXPECTED TO BE IN THE 7
TO 10K FT RANGE. SHOWERS AND THUNDERSTORMS WILL GRADUALLY DIMINISH
IN THE LATE EVENING HOURS THOUGH A FEW STRAY SHOWERS MAY PERSIST
INTO THE NIGHT. MORE SHOWERS AND THUNDERSTORMS WILL DEVELOP AGAIN
FRIDAY AFTERNOON EXCEPT IN SAN BERNARDINO COUNTY. WINDS MAINLY SOUTH-
SOUTHWEST 10-15 KNOTS WITH GUSTS TO 25 KNOTS THROUGH FRIDAY MORNING.
WIND SPEEDS WILL INCREASE TO 15-25 KNOTS WITH GUSTS 30 TO 35 KNOTS
FRIDAY AFTERNOON. GUSTS TO 40 KNOTS ARE POSSIBLE IN WESTERN SAN
BERNARDINO COUNTY.
&&

.SPOTTER INFORMATION STATEMENT...SPOTTERS SHOULD REPORT ACCORDING TO
STANDARD OPERATING PROCEDURES.
&&

$$

SHORT TERM/AVIATION...HARRISON
LONG TERM...GORELOW

FOR MORE FORECAST INFORMATION...SEE US ON OUR WEBPAGE:

HTTP://WEATHER.GOV/LASVEGAS OR FOLLOW US ON FACEBOOK AND TWITTER





000
FXUS65 KVEF 232207
AFDVEF

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
308 PM PDT THU APR 23 2015

.SYNOPSIS...A SERIES OF UPPER LEVEL DISTURBANCES WILL KEEP
RELATIVELY COOL WEATHER WITH ISOLATED TO SCATTERED SHOWERS AND
THUNDERSTORMS IN THE FORECAST THROUGH SATURDAY NIGHT. AREAS OF GUSTY
SOUTHWEST WINDS ARE EXPECTED THROUGH SATURDAY WITH GUSTY NORTH WINDS
DEVELOPING SATURDAY NIGHT AND SUNDAY. HIGH PRESSURE WILL BUILD IN BY
EARLY NEXT WEEK LEADING TO DRY CONDITIONS AND A WARMING TREND. &&

.SHORT TERM...THROUGH SATURDAY NIGHT.

BASICALLY RANDOM CONVECTION DEVELOPED ABOUT AS EXPECTED TODAY
UNDERNEATH THE UPPER LOW OVER THE AREA. A FEW STORMS HAVE ACTUALLY
GENERATED WETTING RAIN BUT THOSE HAVE BEEN SPOTTY. THIS ACTIVITY
WILL CONTINUE THROUGH THE EARLY EVENING BEFORE DECREASE TO JUST A
SLIGHT CHANCE OF SHOWERS OVERNIGHT AS THE LOW/TROUGH MOVES EAST OF
THE AREA. THE NEXT SHORTWAVE WILL MOVE ACROSS THE AREA LATE TONIGHT
THROUGH FRIDAY NIGHT BRINGING A CHANCE OF SHOWERS AND THUNDERSTORMS
TO INYO COUNTY IN CALIFORNIA AND JUST ABOUT ALL OF OUR SOUTHERN
NEVADA AND NORTHWEST ARIZONA AREA. THE BEST PRECIPITATION CHANCES
WILL BE ACROSS THE SOUTHERN GREAT BASIN...CLOSE TO THE MAINLY TROUGH
ENERGY. NORTHERN LINCOLN COUNTY MAY ACTUALLY GET A DECENT AMOUNT OF
RAINFALL WITH THIS SYSTEM FRIDAY AFTERNOON AND EVENING. THE FINAL
AND POSSIBLY STRONGEST TROUGH IN THE SERIES WILL DROP ACROSS NEVADA
INTO ARIZONA SATURDAY AND SATURDAY NIGHT BRINGING CONTINUE
PRECIPITATION CHANCES ACROSS MUCH OF THE AREA EXCEPT PERHAPS SAN
BERNARDINO COUNTY. WE WILL PROBABLY SEE PRETTY GOOD FRONTOGENESIS
WITH THIS SYSTEM...RESULTING IN ANOTHER ROUND OF DECENT
PRECIPITATION OVER LINCOLN COUNTY SATURDAY AFTERNOON. THIS BAND MAY
EVEN PRODUCE DECENT PRECIPITATION ACROSS PORTIONS OF MOHAVE COUNTY
SATURDAY NIGHT WHILE THE WESTERN PART OF THE FORECAST AREA STARTS TO
CLEAR OUT.

WINDS WILL BE A FACTOR IN SOME AREAS THE NEXT COUPLE OF DAY. BREEZY
SOUTHWEST WINDS WILL DEVELOP ACROSS THE MOJAVE DESERT FRIDAY WITH HI-
RES MODELS AND MOS GUIDANCE INDICATING ADVISORY LEVEL WINDS IN THE
WESTERN MOJAVE DESERT OF SAN BERNARDINO COUNTY. THE SAME GUIDANCE
INDICATES EVEN STRONGER WINDS SATURDAY THERE WITH MOS SHOWING
POTENTIAL FOR HIGH WIND CRITERIA BEING REACHED. THIS MAY BE A BIT
OVERDONE HOWEVER. FOR NOW I DECIDED TO GO WITH A WIND ADVISORY FOR
THAT ZONE BEGINNING 11 AM FRIDAY AND RUNNING THROUGH 11 PM SATURDAY.
THERE MAY BE A BIT OF A LULL FRIDAY NIGHT BUT TO KEEP THINGS FROM
GETTING CONFUSING I JUST RAN THE ADVISORY FOR THE WHOLE TIME. GUSTY
NORTH/NORTHWEST WINDS WILL BEGIN TO DEVELOP BEHIND A COLD FRONT
SATURDAY NIGHT AND THERE IS POTENTIAL FOR ADVISORY LEVEL GUSTS IN
PLACES. TEMPERATURE WILL BE A BIT ON THE COOL SIDE DURING THE SHORT
TERM DUE TO THESE UPPER LEVEL DISTURBANCES...CLOUD COVER AND
SHOWERS IN THE AREA.

.LONG TERM...SUNDAY MORNING THROUGH THURSDAY.

DEEP TROUGH WILL BE LOCATED JUST EAST OF THE NEVADA/UTAH BORDER WITH
GUSTY NORTH WINDS EXPECTED ACROSS THE ENTIRE AREA SUNDAY. MOST AREAS
WILL LIKELY SEE WINDS IN THE 20-30 MPH RANGE...BUT LOCATIONS DOWN
THE COLORADO RIVER WILL LIKELY BE HIGHER AND WIND ADVISORIES/LAKE
WIND ADVISORIES MAY BE NEEDED. MUCH OF THE PRECIPITATION IS EXPECTED
TO BE EAST OF THE AREA BY SUNDAY MORNING...BUT A FEW ISOLATED
SHOWERS MAY STILL BE POSSIBLE ALONG THE UTAH BORDER ALONG WITH THE
THE FAR EASTERN AREAS OF MOHAVE COUNTY. BY SUNDAY AFTERNOON THE
TROUGH IS EXPECTED TO BE FAR ENOUGH EAST THAT ANY PRECIPITATION WILL
BE EAST OF THE AREA. ALTHOUGH ITS EXPECTED TO BE DRY AREAWIDE MONDAY
WE WILL STILL HAVE ENOUGH INFLUENCE FROM THE LOW TO KEEP GUSTY NORTH
TO NORTHEAST WINDS OVER THE AREA...ESPECIALLY DOWN THE RIVER. HIGH
PRESSURE WILL BUILD OVER THE AREA TUESDAY THROUGH THURSDAY LEADING
TO WARMING TEMPERATURES AND MUCH LIGHTER WINDS. TEMPERATURES ON
SUNDAY ARE STILL EXPECTED TO BE A FEW DEGREES BELOW NORMAL...BUT ARE
EXPECTED TO CLIMB TO AROUND NORMAL MONDAY. TEMPERATURES ON TUESDAY
ARE FORECAST TO JUMP SEVERAL DEGREES AND MAY BE CLOSE TO 10-15
DEGREES ABOVE NORMAL BY FRIDAY. &&

.AVIATION...FOR MCCARRAN...WINDS ARE EXPECTED TO BE MAINLY FROM THE
SOUTH AROUND 10 KNOTS THROUGH FRIDAY MORNING...INCREASING TO AROUND
15 KNOTS WITH GUSTS TO 25-30 KNOTS FRIDAY AFTERNOON.
HOWEVER...ISOLATED SHOWERS AND THUNDERSTORMS THROUGH THIS EVENING
WILL LIKELY CAUSE ERRATIC WINDS AT TIME. CLOUD BASES WITH THESE
SHOWERS WILL MAINLY BE IN THE 9-10KFT RANGE. MORE SHOWERS COULD
DEVELOP IN THE AREA AGAIN FRIDAY AFTERNOON.

.FOR THE REST OF SOUTHERN NEVADA...NORTHWEST ARIZONA...AND SOUTHEAST
CALIFORNIA...UNSETTLED WEATHER CONDITIONS EXPECTED WITH SCATTERED
SHOWERS AND ISOLATED THUNDERSTORMS EXPECTED. LOCALLY STRONG UPDRAFTS
AND CONVECTIVE TURBULENCE POSSIBLE NEAR SHOWER ACTIVITY AS WELL AS
GUSTY AND ERRATIC SURFACE WINDS. CLOUD BASES EXPECTED TO BE IN THE 7
TO 10K FT RANGE. SHOWERS AND THUNDERSTORMS WILL GRADUALLY DIMINISH
IN THE LATE EVENING HOURS THOUGH A FEW STRAY SHOWERS MAY PERSIST
INTO THE NIGHT. MORE SHOWERS AND THUNDERSTORMS WILL DEVELOP AGAIN
FRIDAY AFTERNOON EXCEPT IN SAN BERNARDINO COUNTY. WINDS MAINLY SOUTH-
SOUTHWEST 10-15 KNOTS WITH GUSTS TO 25 KNOTS THROUGH FRIDAY MORNING.
WIND SPEEDS WILL INCREASE TO 15-25 KNOTS WITH GUSTS 30 TO 35 KNOTS
FRIDAY AFTERNOON. GUSTS TO 40 KNOTS ARE POSSIBLE IN WESTERN SAN
BERNARDINO COUNTY.
&&

.SPOTTER INFORMATION STATEMENT...SPOTTERS SHOULD REPORT ACCORDING TO
STANDARD OPERATING PROCEDURES.
&&

$$

SHORT TERM/AVIATION...HARRISON
LONG TERM...GORELOW

FOR MORE FORECAST INFORMATION...SEE US ON OUR WEBPAGE:

HTTP://WEATHER.GOV/LASVEGAS OR FOLLOW US ON FACEBOOK AND TWITTER




000
FXUS65 KVEF 232207
AFDVEF

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
308 PM PDT THU APR 23 2015

.SYNOPSIS...A SERIES OF UPPER LEVEL DISTURBANCES WILL KEEP
RELATIVELY COOL WEATHER WITH ISOLATED TO SCATTERED SHOWERS AND
THUNDERSTORMS IN THE FORECAST THROUGH SATURDAY NIGHT. AREAS OF GUSTY
SOUTHWEST WINDS ARE EXPECTED THROUGH SATURDAY WITH GUSTY NORTH WINDS
DEVELOPING SATURDAY NIGHT AND SUNDAY. HIGH PRESSURE WILL BUILD IN BY
EARLY NEXT WEEK LEADING TO DRY CONDITIONS AND A WARMING TREND. &&

.SHORT TERM...THROUGH SATURDAY NIGHT.

BASICALLY RANDOM CONVECTION DEVELOPED ABOUT AS EXPECTED TODAY
UNDERNEATH THE UPPER LOW OVER THE AREA. A FEW STORMS HAVE ACTUALLY
GENERATED WETTING RAIN BUT THOSE HAVE BEEN SPOTTY. THIS ACTIVITY
WILL CONTINUE THROUGH THE EARLY EVENING BEFORE DECREASE TO JUST A
SLIGHT CHANCE OF SHOWERS OVERNIGHT AS THE LOW/TROUGH MOVES EAST OF
THE AREA. THE NEXT SHORTWAVE WILL MOVE ACROSS THE AREA LATE TONIGHT
THROUGH FRIDAY NIGHT BRINGING A CHANCE OF SHOWERS AND THUNDERSTORMS
TO INYO COUNTY IN CALIFORNIA AND JUST ABOUT ALL OF OUR SOUTHERN
NEVADA AND NORTHWEST ARIZONA AREA. THE BEST PRECIPITATION CHANCES
WILL BE ACROSS THE SOUTHERN GREAT BASIN...CLOSE TO THE MAINLY TROUGH
ENERGY. NORTHERN LINCOLN COUNTY MAY ACTUALLY GET A DECENT AMOUNT OF
RAINFALL WITH THIS SYSTEM FRIDAY AFTERNOON AND EVENING. THE FINAL
AND POSSIBLY STRONGEST TROUGH IN THE SERIES WILL DROP ACROSS NEVADA
INTO ARIZONA SATURDAY AND SATURDAY NIGHT BRINGING CONTINUE
PRECIPITATION CHANCES ACROSS MUCH OF THE AREA EXCEPT PERHAPS SAN
BERNARDINO COUNTY. WE WILL PROBABLY SEE PRETTY GOOD FRONTOGENESIS
WITH THIS SYSTEM...RESULTING IN ANOTHER ROUND OF DECENT
PRECIPITATION OVER LINCOLN COUNTY SATURDAY AFTERNOON. THIS BAND MAY
EVEN PRODUCE DECENT PRECIPITATION ACROSS PORTIONS OF MOHAVE COUNTY
SATURDAY NIGHT WHILE THE WESTERN PART OF THE FORECAST AREA STARTS TO
CLEAR OUT.

WINDS WILL BE A FACTOR IN SOME AREAS THE NEXT COUPLE OF DAY. BREEZY
SOUTHWEST WINDS WILL DEVELOP ACROSS THE MOJAVE DESERT FRIDAY WITH HI-
RES MODELS AND MOS GUIDANCE INDICATING ADVISORY LEVEL WINDS IN THE
WESTERN MOJAVE DESERT OF SAN BERNARDINO COUNTY. THE SAME GUIDANCE
INDICATES EVEN STRONGER WINDS SATURDAY THERE WITH MOS SHOWING
POTENTIAL FOR HIGH WIND CRITERIA BEING REACHED. THIS MAY BE A BIT
OVERDONE HOWEVER. FOR NOW I DECIDED TO GO WITH A WIND ADVISORY FOR
THAT ZONE BEGINNING 11 AM FRIDAY AND RUNNING THROUGH 11 PM SATURDAY.
THERE MAY BE A BIT OF A LULL FRIDAY NIGHT BUT TO KEEP THINGS FROM
GETTING CONFUSING I JUST RAN THE ADVISORY FOR THE WHOLE TIME. GUSTY
NORTH/NORTHWEST WINDS WILL BEGIN TO DEVELOP BEHIND A COLD FRONT
SATURDAY NIGHT AND THERE IS POTENTIAL FOR ADVISORY LEVEL GUSTS IN
PLACES. TEMPERATURE WILL BE A BIT ON THE COOL SIDE DURING THE SHORT
TERM DUE TO THESE UPPER LEVEL DISTURBANCES...CLOUD COVER AND
SHOWERS IN THE AREA.

.LONG TERM...SUNDAY MORNING THROUGH THURSDAY.

DEEP TROUGH WILL BE LOCATED JUST EAST OF THE NEVADA/UTAH BORDER WITH
GUSTY NORTH WINDS EXPECTED ACROSS THE ENTIRE AREA SUNDAY. MOST AREAS
WILL LIKELY SEE WINDS IN THE 20-30 MPH RANGE...BUT LOCATIONS DOWN
THE COLORADO RIVER WILL LIKELY BE HIGHER AND WIND ADVISORIES/LAKE
WIND ADVISORIES MAY BE NEEDED. MUCH OF THE PRECIPITATION IS EXPECTED
TO BE EAST OF THE AREA BY SUNDAY MORNING...BUT A FEW ISOLATED
SHOWERS MAY STILL BE POSSIBLE ALONG THE UTAH BORDER ALONG WITH THE
THE FAR EASTERN AREAS OF MOHAVE COUNTY. BY SUNDAY AFTERNOON THE
TROUGH IS EXPECTED TO BE FAR ENOUGH EAST THAT ANY PRECIPITATION WILL
BE EAST OF THE AREA. ALTHOUGH ITS EXPECTED TO BE DRY AREAWIDE MONDAY
WE WILL STILL HAVE ENOUGH INFLUENCE FROM THE LOW TO KEEP GUSTY NORTH
TO NORTHEAST WINDS OVER THE AREA...ESPECIALLY DOWN THE RIVER. HIGH
PRESSURE WILL BUILD OVER THE AREA TUESDAY THROUGH THURSDAY LEADING
TO WARMING TEMPERATURES AND MUCH LIGHTER WINDS. TEMPERATURES ON
SUNDAY ARE STILL EXPECTED TO BE A FEW DEGREES BELOW NORMAL...BUT ARE
EXPECTED TO CLIMB TO AROUND NORMAL MONDAY. TEMPERATURES ON TUESDAY
ARE FORECAST TO JUMP SEVERAL DEGREES AND MAY BE CLOSE TO 10-15
DEGREES ABOVE NORMAL BY FRIDAY. &&

.AVIATION...FOR MCCARRAN...WINDS ARE EXPECTED TO BE MAINLY FROM THE
SOUTH AROUND 10 KNOTS THROUGH FRIDAY MORNING...INCREASING TO AROUND
15 KNOTS WITH GUSTS TO 25-30 KNOTS FRIDAY AFTERNOON.
HOWEVER...ISOLATED SHOWERS AND THUNDERSTORMS THROUGH THIS EVENING
WILL LIKELY CAUSE ERRATIC WINDS AT TIME. CLOUD BASES WITH THESE
SHOWERS WILL MAINLY BE IN THE 9-10KFT RANGE. MORE SHOWERS COULD
DEVELOP IN THE AREA AGAIN FRIDAY AFTERNOON.

.FOR THE REST OF SOUTHERN NEVADA...NORTHWEST ARIZONA...AND SOUTHEAST
CALIFORNIA...UNSETTLED WEATHER CONDITIONS EXPECTED WITH SCATTERED
SHOWERS AND ISOLATED THUNDERSTORMS EXPECTED. LOCALLY STRONG UPDRAFTS
AND CONVECTIVE TURBULENCE POSSIBLE NEAR SHOWER ACTIVITY AS WELL AS
GUSTY AND ERRATIC SURFACE WINDS. CLOUD BASES EXPECTED TO BE IN THE 7
TO 10K FT RANGE. SHOWERS AND THUNDERSTORMS WILL GRADUALLY DIMINISH
IN THE LATE EVENING HOURS THOUGH A FEW STRAY SHOWERS MAY PERSIST
INTO THE NIGHT. MORE SHOWERS AND THUNDERSTORMS WILL DEVELOP AGAIN
FRIDAY AFTERNOON EXCEPT IN SAN BERNARDINO COUNTY. WINDS MAINLY SOUTH-
SOUTHWEST 10-15 KNOTS WITH GUSTS TO 25 KNOTS THROUGH FRIDAY MORNING.
WIND SPEEDS WILL INCREASE TO 15-25 KNOTS WITH GUSTS 30 TO 35 KNOTS
FRIDAY AFTERNOON. GUSTS TO 40 KNOTS ARE POSSIBLE IN WESTERN SAN
BERNARDINO COUNTY.
&&

.SPOTTER INFORMATION STATEMENT...SPOTTERS SHOULD REPORT ACCORDING TO
STANDARD OPERATING PROCEDURES.
&&

$$

SHORT TERM/AVIATION...HARRISON
LONG TERM...GORELOW

FOR MORE FORECAST INFORMATION...SEE US ON OUR WEBPAGE:

HTTP://WEATHER.GOV/LASVEGAS OR FOLLOW US ON FACEBOOK AND TWITTER





000
FXUS65 KVEF 232207
AFDVEF

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
308 PM PDT THU APR 23 2015

.SYNOPSIS...A SERIES OF UPPER LEVEL DISTURBANCES WILL KEEP
RELATIVELY COOL WEATHER WITH ISOLATED TO SCATTERED SHOWERS AND
THUNDERSTORMS IN THE FORECAST THROUGH SATURDAY NIGHT. AREAS OF GUSTY
SOUTHWEST WINDS ARE EXPECTED THROUGH SATURDAY WITH GUSTY NORTH WINDS
DEVELOPING SATURDAY NIGHT AND SUNDAY. HIGH PRESSURE WILL BUILD IN BY
EARLY NEXT WEEK LEADING TO DRY CONDITIONS AND A WARMING TREND. &&

.SHORT TERM...THROUGH SATURDAY NIGHT.

BASICALLY RANDOM CONVECTION DEVELOPED ABOUT AS EXPECTED TODAY
UNDERNEATH THE UPPER LOW OVER THE AREA. A FEW STORMS HAVE ACTUALLY
GENERATED WETTING RAIN BUT THOSE HAVE BEEN SPOTTY. THIS ACTIVITY
WILL CONTINUE THROUGH THE EARLY EVENING BEFORE DECREASE TO JUST A
SLIGHT CHANCE OF SHOWERS OVERNIGHT AS THE LOW/TROUGH MOVES EAST OF
THE AREA. THE NEXT SHORTWAVE WILL MOVE ACROSS THE AREA LATE TONIGHT
THROUGH FRIDAY NIGHT BRINGING A CHANCE OF SHOWERS AND THUNDERSTORMS
TO INYO COUNTY IN CALIFORNIA AND JUST ABOUT ALL OF OUR SOUTHERN
NEVADA AND NORTHWEST ARIZONA AREA. THE BEST PRECIPITATION CHANCES
WILL BE ACROSS THE SOUTHERN GREAT BASIN...CLOSE TO THE MAINLY TROUGH
ENERGY. NORTHERN LINCOLN COUNTY MAY ACTUALLY GET A DECENT AMOUNT OF
RAINFALL WITH THIS SYSTEM FRIDAY AFTERNOON AND EVENING. THE FINAL
AND POSSIBLY STRONGEST TROUGH IN THE SERIES WILL DROP ACROSS NEVADA
INTO ARIZONA SATURDAY AND SATURDAY NIGHT BRINGING CONTINUE
PRECIPITATION CHANCES ACROSS MUCH OF THE AREA EXCEPT PERHAPS SAN
BERNARDINO COUNTY. WE WILL PROBABLY SEE PRETTY GOOD FRONTOGENESIS
WITH THIS SYSTEM...RESULTING IN ANOTHER ROUND OF DECENT
PRECIPITATION OVER LINCOLN COUNTY SATURDAY AFTERNOON. THIS BAND MAY
EVEN PRODUCE DECENT PRECIPITATION ACROSS PORTIONS OF MOHAVE COUNTY
SATURDAY NIGHT WHILE THE WESTERN PART OF THE FORECAST AREA STARTS TO
CLEAR OUT.

WINDS WILL BE A FACTOR IN SOME AREAS THE NEXT COUPLE OF DAY. BREEZY
SOUTHWEST WINDS WILL DEVELOP ACROSS THE MOJAVE DESERT FRIDAY WITH HI-
RES MODELS AND MOS GUIDANCE INDICATING ADVISORY LEVEL WINDS IN THE
WESTERN MOJAVE DESERT OF SAN BERNARDINO COUNTY. THE SAME GUIDANCE
INDICATES EVEN STRONGER WINDS SATURDAY THERE WITH MOS SHOWING
POTENTIAL FOR HIGH WIND CRITERIA BEING REACHED. THIS MAY BE A BIT
OVERDONE HOWEVER. FOR NOW I DECIDED TO GO WITH A WIND ADVISORY FOR
THAT ZONE BEGINNING 11 AM FRIDAY AND RUNNING THROUGH 11 PM SATURDAY.
THERE MAY BE A BIT OF A LULL FRIDAY NIGHT BUT TO KEEP THINGS FROM
GETTING CONFUSING I JUST RAN THE ADVISORY FOR THE WHOLE TIME. GUSTY
NORTH/NORTHWEST WINDS WILL BEGIN TO DEVELOP BEHIND A COLD FRONT
SATURDAY NIGHT AND THERE IS POTENTIAL FOR ADVISORY LEVEL GUSTS IN
PLACES. TEMPERATURE WILL BE A BIT ON THE COOL SIDE DURING THE SHORT
TERM DUE TO THESE UPPER LEVEL DISTURBANCES...CLOUD COVER AND
SHOWERS IN THE AREA.

.LONG TERM...SUNDAY MORNING THROUGH THURSDAY.

DEEP TROUGH WILL BE LOCATED JUST EAST OF THE NEVADA/UTAH BORDER WITH
GUSTY NORTH WINDS EXPECTED ACROSS THE ENTIRE AREA SUNDAY. MOST AREAS
WILL LIKELY SEE WINDS IN THE 20-30 MPH RANGE...BUT LOCATIONS DOWN
THE COLORADO RIVER WILL LIKELY BE HIGHER AND WIND ADVISORIES/LAKE
WIND ADVISORIES MAY BE NEEDED. MUCH OF THE PRECIPITATION IS EXPECTED
TO BE EAST OF THE AREA BY SUNDAY MORNING...BUT A FEW ISOLATED
SHOWERS MAY STILL BE POSSIBLE ALONG THE UTAH BORDER ALONG WITH THE
THE FAR EASTERN AREAS OF MOHAVE COUNTY. BY SUNDAY AFTERNOON THE
TROUGH IS EXPECTED TO BE FAR ENOUGH EAST THAT ANY PRECIPITATION WILL
BE EAST OF THE AREA. ALTHOUGH ITS EXPECTED TO BE DRY AREAWIDE MONDAY
WE WILL STILL HAVE ENOUGH INFLUENCE FROM THE LOW TO KEEP GUSTY NORTH
TO NORTHEAST WINDS OVER THE AREA...ESPECIALLY DOWN THE RIVER. HIGH
PRESSURE WILL BUILD OVER THE AREA TUESDAY THROUGH THURSDAY LEADING
TO WARMING TEMPERATURES AND MUCH LIGHTER WINDS. TEMPERATURES ON
SUNDAY ARE STILL EXPECTED TO BE A FEW DEGREES BELOW NORMAL...BUT ARE
EXPECTED TO CLIMB TO AROUND NORMAL MONDAY. TEMPERATURES ON TUESDAY
ARE FORECAST TO JUMP SEVERAL DEGREES AND MAY BE CLOSE TO 10-15
DEGREES ABOVE NORMAL BY FRIDAY. &&

.AVIATION...FOR MCCARRAN...WINDS ARE EXPECTED TO BE MAINLY FROM THE
SOUTH AROUND 10 KNOTS THROUGH FRIDAY MORNING...INCREASING TO AROUND
15 KNOTS WITH GUSTS TO 25-30 KNOTS FRIDAY AFTERNOON.
HOWEVER...ISOLATED SHOWERS AND THUNDERSTORMS THROUGH THIS EVENING
WILL LIKELY CAUSE ERRATIC WINDS AT TIME. CLOUD BASES WITH THESE
SHOWERS WILL MAINLY BE IN THE 9-10KFT RANGE. MORE SHOWERS COULD
DEVELOP IN THE AREA AGAIN FRIDAY AFTERNOON.

.FOR THE REST OF SOUTHERN NEVADA...NORTHWEST ARIZONA...AND SOUTHEAST
CALIFORNIA...UNSETTLED WEATHER CONDITIONS EXPECTED WITH SCATTERED
SHOWERS AND ISOLATED THUNDERSTORMS EXPECTED. LOCALLY STRONG UPDRAFTS
AND CONVECTIVE TURBULENCE POSSIBLE NEAR SHOWER ACTIVITY AS WELL AS
GUSTY AND ERRATIC SURFACE WINDS. CLOUD BASES EXPECTED TO BE IN THE 7
TO 10K FT RANGE. SHOWERS AND THUNDERSTORMS WILL GRADUALLY DIMINISH
IN THE LATE EVENING HOURS THOUGH A FEW STRAY SHOWERS MAY PERSIST
INTO THE NIGHT. MORE SHOWERS AND THUNDERSTORMS WILL DEVELOP AGAIN
FRIDAY AFTERNOON EXCEPT IN SAN BERNARDINO COUNTY. WINDS MAINLY SOUTH-
SOUTHWEST 10-15 KNOTS WITH GUSTS TO 25 KNOTS THROUGH FRIDAY MORNING.
WIND SPEEDS WILL INCREASE TO 15-25 KNOTS WITH GUSTS 30 TO 35 KNOTS
FRIDAY AFTERNOON. GUSTS TO 40 KNOTS ARE POSSIBLE IN WESTERN SAN
BERNARDINO COUNTY.
&&

.SPOTTER INFORMATION STATEMENT...SPOTTERS SHOULD REPORT ACCORDING TO
STANDARD OPERATING PROCEDURES.
&&

$$

SHORT TERM/AVIATION...HARRISON
LONG TERM...GORELOW

FOR MORE FORECAST INFORMATION...SEE US ON OUR WEBPAGE:

HTTP://WEATHER.GOV/LASVEGAS OR FOLLOW US ON FACEBOOK AND TWITTER




000
FXUS65 KVEF 231631
AFDVEF

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
930 AM PDT THU APR 23 2015

.SYNOPSIS...A SERIES OF UPPER LEVEL DISTURBANCES WILL KEEP
RELATIVELY COOL WEATHER WITH ISOLATED TO SCATTERED SHOWERS AND
THUNDERSTORMS IN THE FORECAST THROUGH SATURDAY NIGHT. HIGH PRESSURE
WILL BUILD IN BY EARLY NEXT WEEK LEADING TO DRY CONDITIONS AND A
WARMING TREND.
&&

.UPDATE...UPPER TROUGH/LOW OVER THE AREA TODAY WILL LEAD TO A CHANCE
OF SHOWERS AND THUNDERSTORMS JUST ABOUT EVERYWHERE. STILL NOT
EXPECTING ANY SIGNIFICANT PRECIPITATION AMOUNTS AND RAINFALL COULD
BE SPOTTY. JUST CANNOT RULE PRECIP OUT TOTALLY IN ANY PARTICULAR
AREA. NO UPDATES ANTICIPATED THIS MORNING. -HARRISON-

&&

.PREV DISCUSSION...
240 AM PDT THU APR 23 2015

.SHORT TERM...THROUGH SATURDAY NIGHT.

UNSETTLED WEATHER PATTERN WILL CONTINUE THROUGH SATURDAY AS A SERIES
OF UPPER LEVEL DISTURBANCES TRAVERSE THE AREA. THE FIRST LOW HAS
BEEN RESPONSIBLE FOR THE PAST COUPLE DAYS OF ACTIVE WEATHER ACROSS
THE REGION AND THURSDAY WILL BE NO EXCEPTION AS THE LOW SPINS ACROSS
THE MOJAVE DESERT. BY THIS AFTERNOON THE LOW WILL BE CENTERED NEAR
NEEDLES WITH SCATTERED SHOWERS AND THUNDERSTORMS EXPECTED ESPECIALLY
NORTH AND WEST OF THE LOWS CENTER. SUSPECT THE MOST ACTIVE LOCATIONS
FOR CONVECTION TODAY WILL BE ACROSS THE MOUNTAINS OF CLARK
COUNTY...NORTHERN MOHAVE COUNTY...AND EASTERN SAN BERNARDINO COUNTY
WHERE THE BEST COMBINATION OF INSTABILITY...MOISTURE...AND DYNAMICS
WILL BE IN PLACE. GIVEN THE DEGREE OF INSTABILITY AND UPPER LEVEL
SUPPORT FROM THE LOW...EVEN THE VALLEYS WILL BE SUSCEPTIBLE TO
SHOWERS AND ISOLATED THUNDERSTORMS.

THE FIRST LOW WILL MOVE EAST THURSDAY NIGHT ONLY TO BE REPLACED BY
ANOTHER RIPPLE IN THE FLOW MOVING THROUGH FRIDAY. THIS SECOND
DISTURBANCE WILL KEEP THE UNSETTLED AND SHOWERY WEATHER AROUND BUT
WILL FAVOR OUR SOUTHERN GREAT BASIN ZONES AND MOHAVE COUNTY MORE
THAN THE MOJAVE DESERT ZONES. THIS MEANS THE GREATEST CHANCES FOR
RAIN ON FRIDAY WILL BE NORTH AND EAST OF LAS VEGAS.

THE THIRD AND FINAL DISTURBANCE WILL APPROACH SATURDAY AS A FAIRLY
STRONG CLOSED LOW DEVELOPS OVER EASTERN OREGON AND ZIPS SOUTHWARD
ACROSS THE GREAT BASIN AND INTO NORTHERN ARIZONA BY SUNDAY MORNING.
WHILE THIS IS USUALLY A DRY TRAJECTORY THERE WILL BE PLENTY OF
RESIDUAL MOISTURE AND INSTABILITY LEFT BEHIND FROM PREVIOUS
DISTURBANCES FOR THIS FINAL SYSTEM TO WORK WITH. SATURDAY SHOWER AND
STORM CHANCES WILL BE FAIRLY HIGH ACROSS THE SOUTHERN GREAT BASIN
WHERE FORECAST MODELS TARGET LINCOLN COUNTY WITH A FAIRLY HEALTHY
SWATH OF RAINFALL IN EXCESS A QUARTER OF AN INCH. THIS BAND WILL
TRACK SOUTH AND EAST OVERNIGHT WITH SOME SHOWERS POSSIBLE MAINLY
EAST OF THE CALIFORNIA STATE LINE.  WE WILL ALSO HAVE SOME WIND TO
CONTEND WITH AS THIS FINAL LOW DRAGS A FAIRLY STRONG COLD FRONT AND
TIGHT PRESSURE GRADIENT SOUTHWARD WITH IT....SO WIND HEADLINES ARE
VERY POSSIBLE SATURDAY ACROSS PARTS OF SAN BERNARDINO COUNTY...WITH
GUSTY WINDS POSSIBLE ELSEWHERE TOO.

.LONG TERM...SUNDAY MORNING THROUGH THURSDAY.

SUSTAINED NORTH WINDS OF 15 TO 25 MPH WITH GUSTS UP TO 35 MPH WILL
DEVELOP OVER MOST OF THE FORECAST AREA EARLY SUNDAY BEHIND THE FINAL
UPPER LOW OF THE SERIES...WHICH WILL BE PULLING AWAY ACROSS ARIZONA
DURING THE DAY. THE CENTER OF THE CLOSED SYSTEM IS FORECAST TO DIVE
DOWN THROUGH SOUTHERN UTAH INTO ARIZONA SUNDAY MORNING WITH ENOUGH
MOISTURE AND COLD POOL INSTABILITY TO PRODUCE ISOLATED TO SCATTERED
SHOWERS OVER PRIMARILY EASTERN LINCOLN AND MOHAVE COUNTIES BETWEEN
12Z AND 18Z SUNDAY. DEEP NORTHERLY FLOW AND SUBSIDENCE ON THE BACK
SIDE OF THE SYSTEM WILL KEEP BREEZY TO WINDY CONDITIONS GOING
AREAWIDE SUNDAY...AND GUSTS OVER 40 MPH WILL BE POSSIBLE IN
FAVORABLE NORTH/SOUTH CHANNELS LIKE PARTS OF THE COLORADO RIVER
VALLEY. NORTH WINDS WILL DECREASE SUNDAY NIGHT AND MONDAY AS AN
EASTERN PACIFIC RIDGE ALOFT BEGINS TO NOSE INTO THE WESTERN MOJAVE
DESERT AND GREAT BASIN MONDAY THROUGH THE MIDDLE OF NEXT WEEK. THIS
WILL LEAD TO TEMPERATURES CLIMBING BACK ABOVE NORMAL WITH READINGS
OF 90 TO 100 DEGREES OVER THE MOJAVE DESERT AND COLORADO RIVER
VALLEY BY MID WEEK.

&&

.AVIATION...FOR MCCARRAN...GENERALLY SOUTHERLY WINDS OF 8 TO 12 KTS
EXPECTED THURSDAY AFTER 18Z. SHOWERS AND THUNDERSTORMS DEVELOPING IN
THE VICINITY DURING THE AFTERNOON WILL LEAD TO PERIODS OF ERRATIC
AND GUSTY WINDS NEAR THE AIRFIELD. SHOWERS AND THUNDERSTORMS SOUTH
AND WEST OF THE AIRFIELD MAY IMPACT THOSE AIR TRAFFIC CORRIDORS AT
TIMES.  LOCALLY STRONG UPDRAFTS AND CONVECTIVE TURBULENCE POSSIBLE
NEAR SHOWER ACTIVITY WITH CIGS IN THE 8-10K FT RANGE EXPECTED.
IMPROVING CONDITIONS EXPECTED AFTER 3Z FRIDAY WITH CLOUDS SCATTERING
OUT AND SHOWERS DIMINISHING.

.FOR THE REST OF SOUTHERN NEVADA...NORTHWEST ARIZONA...AND SOUTHEAST
CALIFORNIA...UNSETTLED WEATHER CONDITIONS EXPECTED WITH SCATTERED
SHOWERS AND ISOLATED THUNDERSTORMS EXPECTED. LOCALLY STRONG UPDRAFTS
AND CONVECTIVE TURBULENCE POSSIBLE NEAR SHOWER ACTIVITY AS WELL AS
GUSTY AND ERRATIC SURFACE WINDS. CLOUD BASES EXPECTED TO BE IN THE 7
TO 10K FT RANGE. SHOWERS AND THUNDERSTORMS WILL GRADUALLY DIMINISH
IN THE LATE EVENING HOURS THOUGH A FEW STRAY SHOWERS MAY PERSIST
INTO THE NIGHT.

&&

.SPOTTER INFORMATION STATEMENT...SPOTTERS SHOULD REPORT ACCORDING TO
STANDARD OPERATING PROCEDURES.

&&

$$

SHORT TERM/AVIATION...OUTLER
LONG TERM...ADAIR

FOR MORE FORECAST INFORMATION...SEE US ON OUR WEBPAGE:

HTTP://WEATHER.GOV/LASVEGAS OR FOLLOW US ON FACEBOOK AND TWITTER




000
FXUS65 KVEF 231631
AFDVEF

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
930 AM PDT THU APR 23 2015

.SYNOPSIS...A SERIES OF UPPER LEVEL DISTURBANCES WILL KEEP
RELATIVELY COOL WEATHER WITH ISOLATED TO SCATTERED SHOWERS AND
THUNDERSTORMS IN THE FORECAST THROUGH SATURDAY NIGHT. HIGH PRESSURE
WILL BUILD IN BY EARLY NEXT WEEK LEADING TO DRY CONDITIONS AND A
WARMING TREND.
&&

.UPDATE...UPPER TROUGH/LOW OVER THE AREA TODAY WILL LEAD TO A CHANCE
OF SHOWERS AND THUNDERSTORMS JUST ABOUT EVERYWHERE. STILL NOT
EXPECTING ANY SIGNIFICANT PRECIPITATION AMOUNTS AND RAINFALL COULD
BE SPOTTY. JUST CANNOT RULE PRECIP OUT TOTALLY IN ANY PARTICULAR
AREA. NO UPDATES ANTICIPATED THIS MORNING. -HARRISON-

&&

.PREV DISCUSSION...
240 AM PDT THU APR 23 2015

.SHORT TERM...THROUGH SATURDAY NIGHT.

UNSETTLED WEATHER PATTERN WILL CONTINUE THROUGH SATURDAY AS A SERIES
OF UPPER LEVEL DISTURBANCES TRAVERSE THE AREA. THE FIRST LOW HAS
BEEN RESPONSIBLE FOR THE PAST COUPLE DAYS OF ACTIVE WEATHER ACROSS
THE REGION AND THURSDAY WILL BE NO EXCEPTION AS THE LOW SPINS ACROSS
THE MOJAVE DESERT. BY THIS AFTERNOON THE LOW WILL BE CENTERED NEAR
NEEDLES WITH SCATTERED SHOWERS AND THUNDERSTORMS EXPECTED ESPECIALLY
NORTH AND WEST OF THE LOWS CENTER. SUSPECT THE MOST ACTIVE LOCATIONS
FOR CONVECTION TODAY WILL BE ACROSS THE MOUNTAINS OF CLARK
COUNTY...NORTHERN MOHAVE COUNTY...AND EASTERN SAN BERNARDINO COUNTY
WHERE THE BEST COMBINATION OF INSTABILITY...MOISTURE...AND DYNAMICS
WILL BE IN PLACE. GIVEN THE DEGREE OF INSTABILITY AND UPPER LEVEL
SUPPORT FROM THE LOW...EVEN THE VALLEYS WILL BE SUSCEPTIBLE TO
SHOWERS AND ISOLATED THUNDERSTORMS.

THE FIRST LOW WILL MOVE EAST THURSDAY NIGHT ONLY TO BE REPLACED BY
ANOTHER RIPPLE IN THE FLOW MOVING THROUGH FRIDAY. THIS SECOND
DISTURBANCE WILL KEEP THE UNSETTLED AND SHOWERY WEATHER AROUND BUT
WILL FAVOR OUR SOUTHERN GREAT BASIN ZONES AND MOHAVE COUNTY MORE
THAN THE MOJAVE DESERT ZONES. THIS MEANS THE GREATEST CHANCES FOR
RAIN ON FRIDAY WILL BE NORTH AND EAST OF LAS VEGAS.

THE THIRD AND FINAL DISTURBANCE WILL APPROACH SATURDAY AS A FAIRLY
STRONG CLOSED LOW DEVELOPS OVER EASTERN OREGON AND ZIPS SOUTHWARD
ACROSS THE GREAT BASIN AND INTO NORTHERN ARIZONA BY SUNDAY MORNING.
WHILE THIS IS USUALLY A DRY TRAJECTORY THERE WILL BE PLENTY OF
RESIDUAL MOISTURE AND INSTABILITY LEFT BEHIND FROM PREVIOUS
DISTURBANCES FOR THIS FINAL SYSTEM TO WORK WITH. SATURDAY SHOWER AND
STORM CHANCES WILL BE FAIRLY HIGH ACROSS THE SOUTHERN GREAT BASIN
WHERE FORECAST MODELS TARGET LINCOLN COUNTY WITH A FAIRLY HEALTHY
SWATH OF RAINFALL IN EXCESS A QUARTER OF AN INCH. THIS BAND WILL
TRACK SOUTH AND EAST OVERNIGHT WITH SOME SHOWERS POSSIBLE MAINLY
EAST OF THE CALIFORNIA STATE LINE.  WE WILL ALSO HAVE SOME WIND TO
CONTEND WITH AS THIS FINAL LOW DRAGS A FAIRLY STRONG COLD FRONT AND
TIGHT PRESSURE GRADIENT SOUTHWARD WITH IT....SO WIND HEADLINES ARE
VERY POSSIBLE SATURDAY ACROSS PARTS OF SAN BERNARDINO COUNTY...WITH
GUSTY WINDS POSSIBLE ELSEWHERE TOO.

.LONG TERM...SUNDAY MORNING THROUGH THURSDAY.

SUSTAINED NORTH WINDS OF 15 TO 25 MPH WITH GUSTS UP TO 35 MPH WILL
DEVELOP OVER MOST OF THE FORECAST AREA EARLY SUNDAY BEHIND THE FINAL
UPPER LOW OF THE SERIES...WHICH WILL BE PULLING AWAY ACROSS ARIZONA
DURING THE DAY. THE CENTER OF THE CLOSED SYSTEM IS FORECAST TO DIVE
DOWN THROUGH SOUTHERN UTAH INTO ARIZONA SUNDAY MORNING WITH ENOUGH
MOISTURE AND COLD POOL INSTABILITY TO PRODUCE ISOLATED TO SCATTERED
SHOWERS OVER PRIMARILY EASTERN LINCOLN AND MOHAVE COUNTIES BETWEEN
12Z AND 18Z SUNDAY. DEEP NORTHERLY FLOW AND SUBSIDENCE ON THE BACK
SIDE OF THE SYSTEM WILL KEEP BREEZY TO WINDY CONDITIONS GOING
AREAWIDE SUNDAY...AND GUSTS OVER 40 MPH WILL BE POSSIBLE IN
FAVORABLE NORTH/SOUTH CHANNELS LIKE PARTS OF THE COLORADO RIVER
VALLEY. NORTH WINDS WILL DECREASE SUNDAY NIGHT AND MONDAY AS AN
EASTERN PACIFIC RIDGE ALOFT BEGINS TO NOSE INTO THE WESTERN MOJAVE
DESERT AND GREAT BASIN MONDAY THROUGH THE MIDDLE OF NEXT WEEK. THIS
WILL LEAD TO TEMPERATURES CLIMBING BACK ABOVE NORMAL WITH READINGS
OF 90 TO 100 DEGREES OVER THE MOJAVE DESERT AND COLORADO RIVER
VALLEY BY MID WEEK.

&&

.AVIATION...FOR MCCARRAN...GENERALLY SOUTHERLY WINDS OF 8 TO 12 KTS
EXPECTED THURSDAY AFTER 18Z. SHOWERS AND THUNDERSTORMS DEVELOPING IN
THE VICINITY DURING THE AFTERNOON WILL LEAD TO PERIODS OF ERRATIC
AND GUSTY WINDS NEAR THE AIRFIELD. SHOWERS AND THUNDERSTORMS SOUTH
AND WEST OF THE AIRFIELD MAY IMPACT THOSE AIR TRAFFIC CORRIDORS AT
TIMES.  LOCALLY STRONG UPDRAFTS AND CONVECTIVE TURBULENCE POSSIBLE
NEAR SHOWER ACTIVITY WITH CIGS IN THE 8-10K FT RANGE EXPECTED.
IMPROVING CONDITIONS EXPECTED AFTER 3Z FRIDAY WITH CLOUDS SCATTERING
OUT AND SHOWERS DIMINISHING.

.FOR THE REST OF SOUTHERN NEVADA...NORTHWEST ARIZONA...AND SOUTHEAST
CALIFORNIA...UNSETTLED WEATHER CONDITIONS EXPECTED WITH SCATTERED
SHOWERS AND ISOLATED THUNDERSTORMS EXPECTED. LOCALLY STRONG UPDRAFTS
AND CONVECTIVE TURBULENCE POSSIBLE NEAR SHOWER ACTIVITY AS WELL AS
GUSTY AND ERRATIC SURFACE WINDS. CLOUD BASES EXPECTED TO BE IN THE 7
TO 10K FT RANGE. SHOWERS AND THUNDERSTORMS WILL GRADUALLY DIMINISH
IN THE LATE EVENING HOURS THOUGH A FEW STRAY SHOWERS MAY PERSIST
INTO THE NIGHT.

&&

.SPOTTER INFORMATION STATEMENT...SPOTTERS SHOULD REPORT ACCORDING TO
STANDARD OPERATING PROCEDURES.

&&

$$

SHORT TERM/AVIATION...OUTLER
LONG TERM...ADAIR

FOR MORE FORECAST INFORMATION...SEE US ON OUR WEBPAGE:

HTTP://WEATHER.GOV/LASVEGAS OR FOLLOW US ON FACEBOOK AND TWITTER





000
FXUS65 KVEF 231631
AFDVEF

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
930 AM PDT THU APR 23 2015

.SYNOPSIS...A SERIES OF UPPER LEVEL DISTURBANCES WILL KEEP
RELATIVELY COOL WEATHER WITH ISOLATED TO SCATTERED SHOWERS AND
THUNDERSTORMS IN THE FORECAST THROUGH SATURDAY NIGHT. HIGH PRESSURE
WILL BUILD IN BY EARLY NEXT WEEK LEADING TO DRY CONDITIONS AND A
WARMING TREND.
&&

.UPDATE...UPPER TROUGH/LOW OVER THE AREA TODAY WILL LEAD TO A CHANCE
OF SHOWERS AND THUNDERSTORMS JUST ABOUT EVERYWHERE. STILL NOT
EXPECTING ANY SIGNIFICANT PRECIPITATION AMOUNTS AND RAINFALL COULD
BE SPOTTY. JUST CANNOT RULE PRECIP OUT TOTALLY IN ANY PARTICULAR
AREA. NO UPDATES ANTICIPATED THIS MORNING. -HARRISON-

&&

.PREV DISCUSSION...
240 AM PDT THU APR 23 2015

.SHORT TERM...THROUGH SATURDAY NIGHT.

UNSETTLED WEATHER PATTERN WILL CONTINUE THROUGH SATURDAY AS A SERIES
OF UPPER LEVEL DISTURBANCES TRAVERSE THE AREA. THE FIRST LOW HAS
BEEN RESPONSIBLE FOR THE PAST COUPLE DAYS OF ACTIVE WEATHER ACROSS
THE REGION AND THURSDAY WILL BE NO EXCEPTION AS THE LOW SPINS ACROSS
THE MOJAVE DESERT. BY THIS AFTERNOON THE LOW WILL BE CENTERED NEAR
NEEDLES WITH SCATTERED SHOWERS AND THUNDERSTORMS EXPECTED ESPECIALLY
NORTH AND WEST OF THE LOWS CENTER. SUSPECT THE MOST ACTIVE LOCATIONS
FOR CONVECTION TODAY WILL BE ACROSS THE MOUNTAINS OF CLARK
COUNTY...NORTHERN MOHAVE COUNTY...AND EASTERN SAN BERNARDINO COUNTY
WHERE THE BEST COMBINATION OF INSTABILITY...MOISTURE...AND DYNAMICS
WILL BE IN PLACE. GIVEN THE DEGREE OF INSTABILITY AND UPPER LEVEL
SUPPORT FROM THE LOW...EVEN THE VALLEYS WILL BE SUSCEPTIBLE TO
SHOWERS AND ISOLATED THUNDERSTORMS.

THE FIRST LOW WILL MOVE EAST THURSDAY NIGHT ONLY TO BE REPLACED BY
ANOTHER RIPPLE IN THE FLOW MOVING THROUGH FRIDAY. THIS SECOND
DISTURBANCE WILL KEEP THE UNSETTLED AND SHOWERY WEATHER AROUND BUT
WILL FAVOR OUR SOUTHERN GREAT BASIN ZONES AND MOHAVE COUNTY MORE
THAN THE MOJAVE DESERT ZONES. THIS MEANS THE GREATEST CHANCES FOR
RAIN ON FRIDAY WILL BE NORTH AND EAST OF LAS VEGAS.

THE THIRD AND FINAL DISTURBANCE WILL APPROACH SATURDAY AS A FAIRLY
STRONG CLOSED LOW DEVELOPS OVER EASTERN OREGON AND ZIPS SOUTHWARD
ACROSS THE GREAT BASIN AND INTO NORTHERN ARIZONA BY SUNDAY MORNING.
WHILE THIS IS USUALLY A DRY TRAJECTORY THERE WILL BE PLENTY OF
RESIDUAL MOISTURE AND INSTABILITY LEFT BEHIND FROM PREVIOUS
DISTURBANCES FOR THIS FINAL SYSTEM TO WORK WITH. SATURDAY SHOWER AND
STORM CHANCES WILL BE FAIRLY HIGH ACROSS THE SOUTHERN GREAT BASIN
WHERE FORECAST MODELS TARGET LINCOLN COUNTY WITH A FAIRLY HEALTHY
SWATH OF RAINFALL IN EXCESS A QUARTER OF AN INCH. THIS BAND WILL
TRACK SOUTH AND EAST OVERNIGHT WITH SOME SHOWERS POSSIBLE MAINLY
EAST OF THE CALIFORNIA STATE LINE.  WE WILL ALSO HAVE SOME WIND TO
CONTEND WITH AS THIS FINAL LOW DRAGS A FAIRLY STRONG COLD FRONT AND
TIGHT PRESSURE GRADIENT SOUTHWARD WITH IT....SO WIND HEADLINES ARE
VERY POSSIBLE SATURDAY ACROSS PARTS OF SAN BERNARDINO COUNTY...WITH
GUSTY WINDS POSSIBLE ELSEWHERE TOO.

.LONG TERM...SUNDAY MORNING THROUGH THURSDAY.

SUSTAINED NORTH WINDS OF 15 TO 25 MPH WITH GUSTS UP TO 35 MPH WILL
DEVELOP OVER MOST OF THE FORECAST AREA EARLY SUNDAY BEHIND THE FINAL
UPPER LOW OF THE SERIES...WHICH WILL BE PULLING AWAY ACROSS ARIZONA
DURING THE DAY. THE CENTER OF THE CLOSED SYSTEM IS FORECAST TO DIVE
DOWN THROUGH SOUTHERN UTAH INTO ARIZONA SUNDAY MORNING WITH ENOUGH
MOISTURE AND COLD POOL INSTABILITY TO PRODUCE ISOLATED TO SCATTERED
SHOWERS OVER PRIMARILY EASTERN LINCOLN AND MOHAVE COUNTIES BETWEEN
12Z AND 18Z SUNDAY. DEEP NORTHERLY FLOW AND SUBSIDENCE ON THE BACK
SIDE OF THE SYSTEM WILL KEEP BREEZY TO WINDY CONDITIONS GOING
AREAWIDE SUNDAY...AND GUSTS OVER 40 MPH WILL BE POSSIBLE IN
FAVORABLE NORTH/SOUTH CHANNELS LIKE PARTS OF THE COLORADO RIVER
VALLEY. NORTH WINDS WILL DECREASE SUNDAY NIGHT AND MONDAY AS AN
EASTERN PACIFIC RIDGE ALOFT BEGINS TO NOSE INTO THE WESTERN MOJAVE
DESERT AND GREAT BASIN MONDAY THROUGH THE MIDDLE OF NEXT WEEK. THIS
WILL LEAD TO TEMPERATURES CLIMBING BACK ABOVE NORMAL WITH READINGS
OF 90 TO 100 DEGREES OVER THE MOJAVE DESERT AND COLORADO RIVER
VALLEY BY MID WEEK.

&&

.AVIATION...FOR MCCARRAN...GENERALLY SOUTHERLY WINDS OF 8 TO 12 KTS
EXPECTED THURSDAY AFTER 18Z. SHOWERS AND THUNDERSTORMS DEVELOPING IN
THE VICINITY DURING THE AFTERNOON WILL LEAD TO PERIODS OF ERRATIC
AND GUSTY WINDS NEAR THE AIRFIELD. SHOWERS AND THUNDERSTORMS SOUTH
AND WEST OF THE AIRFIELD MAY IMPACT THOSE AIR TRAFFIC CORRIDORS AT
TIMES.  LOCALLY STRONG UPDRAFTS AND CONVECTIVE TURBULENCE POSSIBLE
NEAR SHOWER ACTIVITY WITH CIGS IN THE 8-10K FT RANGE EXPECTED.
IMPROVING CONDITIONS EXPECTED AFTER 3Z FRIDAY WITH CLOUDS SCATTERING
OUT AND SHOWERS DIMINISHING.

.FOR THE REST OF SOUTHERN NEVADA...NORTHWEST ARIZONA...AND SOUTHEAST
CALIFORNIA...UNSETTLED WEATHER CONDITIONS EXPECTED WITH SCATTERED
SHOWERS AND ISOLATED THUNDERSTORMS EXPECTED. LOCALLY STRONG UPDRAFTS
AND CONVECTIVE TURBULENCE POSSIBLE NEAR SHOWER ACTIVITY AS WELL AS
GUSTY AND ERRATIC SURFACE WINDS. CLOUD BASES EXPECTED TO BE IN THE 7
TO 10K FT RANGE. SHOWERS AND THUNDERSTORMS WILL GRADUALLY DIMINISH
IN THE LATE EVENING HOURS THOUGH A FEW STRAY SHOWERS MAY PERSIST
INTO THE NIGHT.

&&

.SPOTTER INFORMATION STATEMENT...SPOTTERS SHOULD REPORT ACCORDING TO
STANDARD OPERATING PROCEDURES.

&&

$$

SHORT TERM/AVIATION...OUTLER
LONG TERM...ADAIR

FOR MORE FORECAST INFORMATION...SEE US ON OUR WEBPAGE:

HTTP://WEATHER.GOV/LASVEGAS OR FOLLOW US ON FACEBOOK AND TWITTER





000
FXUS65 KVEF 231631
AFDVEF

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
930 AM PDT THU APR 23 2015

.SYNOPSIS...A SERIES OF UPPER LEVEL DISTURBANCES WILL KEEP
RELATIVELY COOL WEATHER WITH ISOLATED TO SCATTERED SHOWERS AND
THUNDERSTORMS IN THE FORECAST THROUGH SATURDAY NIGHT. HIGH PRESSURE
WILL BUILD IN BY EARLY NEXT WEEK LEADING TO DRY CONDITIONS AND A
WARMING TREND.
&&

.UPDATE...UPPER TROUGH/LOW OVER THE AREA TODAY WILL LEAD TO A CHANCE
OF SHOWERS AND THUNDERSTORMS JUST ABOUT EVERYWHERE. STILL NOT
EXPECTING ANY SIGNIFICANT PRECIPITATION AMOUNTS AND RAINFALL COULD
BE SPOTTY. JUST CANNOT RULE PRECIP OUT TOTALLY IN ANY PARTICULAR
AREA. NO UPDATES ANTICIPATED THIS MORNING. -HARRISON-

&&

.PREV DISCUSSION...
240 AM PDT THU APR 23 2015

.SHORT TERM...THROUGH SATURDAY NIGHT.

UNSETTLED WEATHER PATTERN WILL CONTINUE THROUGH SATURDAY AS A SERIES
OF UPPER LEVEL DISTURBANCES TRAVERSE THE AREA. THE FIRST LOW HAS
BEEN RESPONSIBLE FOR THE PAST COUPLE DAYS OF ACTIVE WEATHER ACROSS
THE REGION AND THURSDAY WILL BE NO EXCEPTION AS THE LOW SPINS ACROSS
THE MOJAVE DESERT. BY THIS AFTERNOON THE LOW WILL BE CENTERED NEAR
NEEDLES WITH SCATTERED SHOWERS AND THUNDERSTORMS EXPECTED ESPECIALLY
NORTH AND WEST OF THE LOWS CENTER. SUSPECT THE MOST ACTIVE LOCATIONS
FOR CONVECTION TODAY WILL BE ACROSS THE MOUNTAINS OF CLARK
COUNTY...NORTHERN MOHAVE COUNTY...AND EASTERN SAN BERNARDINO COUNTY
WHERE THE BEST COMBINATION OF INSTABILITY...MOISTURE...AND DYNAMICS
WILL BE IN PLACE. GIVEN THE DEGREE OF INSTABILITY AND UPPER LEVEL
SUPPORT FROM THE LOW...EVEN THE VALLEYS WILL BE SUSCEPTIBLE TO
SHOWERS AND ISOLATED THUNDERSTORMS.

THE FIRST LOW WILL MOVE EAST THURSDAY NIGHT ONLY TO BE REPLACED BY
ANOTHER RIPPLE IN THE FLOW MOVING THROUGH FRIDAY. THIS SECOND
DISTURBANCE WILL KEEP THE UNSETTLED AND SHOWERY WEATHER AROUND BUT
WILL FAVOR OUR SOUTHERN GREAT BASIN ZONES AND MOHAVE COUNTY MORE
THAN THE MOJAVE DESERT ZONES. THIS MEANS THE GREATEST CHANCES FOR
RAIN ON FRIDAY WILL BE NORTH AND EAST OF LAS VEGAS.

THE THIRD AND FINAL DISTURBANCE WILL APPROACH SATURDAY AS A FAIRLY
STRONG CLOSED LOW DEVELOPS OVER EASTERN OREGON AND ZIPS SOUTHWARD
ACROSS THE GREAT BASIN AND INTO NORTHERN ARIZONA BY SUNDAY MORNING.
WHILE THIS IS USUALLY A DRY TRAJECTORY THERE WILL BE PLENTY OF
RESIDUAL MOISTURE AND INSTABILITY LEFT BEHIND FROM PREVIOUS
DISTURBANCES FOR THIS FINAL SYSTEM TO WORK WITH. SATURDAY SHOWER AND
STORM CHANCES WILL BE FAIRLY HIGH ACROSS THE SOUTHERN GREAT BASIN
WHERE FORECAST MODELS TARGET LINCOLN COUNTY WITH A FAIRLY HEALTHY
SWATH OF RAINFALL IN EXCESS A QUARTER OF AN INCH. THIS BAND WILL
TRACK SOUTH AND EAST OVERNIGHT WITH SOME SHOWERS POSSIBLE MAINLY
EAST OF THE CALIFORNIA STATE LINE.  WE WILL ALSO HAVE SOME WIND TO
CONTEND WITH AS THIS FINAL LOW DRAGS A FAIRLY STRONG COLD FRONT AND
TIGHT PRESSURE GRADIENT SOUTHWARD WITH IT....SO WIND HEADLINES ARE
VERY POSSIBLE SATURDAY ACROSS PARTS OF SAN BERNARDINO COUNTY...WITH
GUSTY WINDS POSSIBLE ELSEWHERE TOO.

.LONG TERM...SUNDAY MORNING THROUGH THURSDAY.

SUSTAINED NORTH WINDS OF 15 TO 25 MPH WITH GUSTS UP TO 35 MPH WILL
DEVELOP OVER MOST OF THE FORECAST AREA EARLY SUNDAY BEHIND THE FINAL
UPPER LOW OF THE SERIES...WHICH WILL BE PULLING AWAY ACROSS ARIZONA
DURING THE DAY. THE CENTER OF THE CLOSED SYSTEM IS FORECAST TO DIVE
DOWN THROUGH SOUTHERN UTAH INTO ARIZONA SUNDAY MORNING WITH ENOUGH
MOISTURE AND COLD POOL INSTABILITY TO PRODUCE ISOLATED TO SCATTERED
SHOWERS OVER PRIMARILY EASTERN LINCOLN AND MOHAVE COUNTIES BETWEEN
12Z AND 18Z SUNDAY. DEEP NORTHERLY FLOW AND SUBSIDENCE ON THE BACK
SIDE OF THE SYSTEM WILL KEEP BREEZY TO WINDY CONDITIONS GOING
AREAWIDE SUNDAY...AND GUSTS OVER 40 MPH WILL BE POSSIBLE IN
FAVORABLE NORTH/SOUTH CHANNELS LIKE PARTS OF THE COLORADO RIVER
VALLEY. NORTH WINDS WILL DECREASE SUNDAY NIGHT AND MONDAY AS AN
EASTERN PACIFIC RIDGE ALOFT BEGINS TO NOSE INTO THE WESTERN MOJAVE
DESERT AND GREAT BASIN MONDAY THROUGH THE MIDDLE OF NEXT WEEK. THIS
WILL LEAD TO TEMPERATURES CLIMBING BACK ABOVE NORMAL WITH READINGS
OF 90 TO 100 DEGREES OVER THE MOJAVE DESERT AND COLORADO RIVER
VALLEY BY MID WEEK.

&&

.AVIATION...FOR MCCARRAN...GENERALLY SOUTHERLY WINDS OF 8 TO 12 KTS
EXPECTED THURSDAY AFTER 18Z. SHOWERS AND THUNDERSTORMS DEVELOPING IN
THE VICINITY DURING THE AFTERNOON WILL LEAD TO PERIODS OF ERRATIC
AND GUSTY WINDS NEAR THE AIRFIELD. SHOWERS AND THUNDERSTORMS SOUTH
AND WEST OF THE AIRFIELD MAY IMPACT THOSE AIR TRAFFIC CORRIDORS AT
TIMES.  LOCALLY STRONG UPDRAFTS AND CONVECTIVE TURBULENCE POSSIBLE
NEAR SHOWER ACTIVITY WITH CIGS IN THE 8-10K FT RANGE EXPECTED.
IMPROVING CONDITIONS EXPECTED AFTER 3Z FRIDAY WITH CLOUDS SCATTERING
OUT AND SHOWERS DIMINISHING.

.FOR THE REST OF SOUTHERN NEVADA...NORTHWEST ARIZONA...AND SOUTHEAST
CALIFORNIA...UNSETTLED WEATHER CONDITIONS EXPECTED WITH SCATTERED
SHOWERS AND ISOLATED THUNDERSTORMS EXPECTED. LOCALLY STRONG UPDRAFTS
AND CONVECTIVE TURBULENCE POSSIBLE NEAR SHOWER ACTIVITY AS WELL AS
GUSTY AND ERRATIC SURFACE WINDS. CLOUD BASES EXPECTED TO BE IN THE 7
TO 10K FT RANGE. SHOWERS AND THUNDERSTORMS WILL GRADUALLY DIMINISH
IN THE LATE EVENING HOURS THOUGH A FEW STRAY SHOWERS MAY PERSIST
INTO THE NIGHT.

&&

.SPOTTER INFORMATION STATEMENT...SPOTTERS SHOULD REPORT ACCORDING TO
STANDARD OPERATING PROCEDURES.

&&

$$

SHORT TERM/AVIATION...OUTLER
LONG TERM...ADAIR

FOR MORE FORECAST INFORMATION...SEE US ON OUR WEBPAGE:

HTTP://WEATHER.GOV/LASVEGAS OR FOLLOW US ON FACEBOOK AND TWITTER




000
FXUS65 KVEF 230942
AFDVEF

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
240 AM PDT THU APR 23 2015

.SYNOPSIS...A SERIES OF UPPER LEVEL DISTURBANCES WILL KEEP
RELATIVELY COOL WEATHER WITH ISOLATED TO SCATTERED SHOWERS AND
THUNDERSTORMS IN THE FORECAST THROUGH SATURDAY NIGHT. HIGH PRESSURE
WILL BUILD IN BY EARLY NEXT WEEK LEADING TO DRY CONDITIONS AND A
WARMING TREND.

&&

.SHORT TERM...THROUGH SATURDAY NIGHT.

UNSETTLED WEATHER PATTERN WILL CONTINUE THROUGH SATURDAY AS A SERIES
OF UPPER LEVEL DISTURBANCES TRAVERSE THE AREA. THE FIRST LOW HAS
BEEN RESPONSIBLE FOR THE PAST COUPLE DAYS OF ACTIVE WEATHER ACROSS
THE REGION AND THURSDAY WILL BE NO EXCEPTION AS THE LOW SPINS ACROSS
THE MOJAVE DESERT. BY THIS AFTERNOON THE LOW WILL BE CENTERED NEAR
NEEDLES WITH SCATTERED SHOWERS AND THUNDERSTORMS EXPECTED ESPECIALLY
NORTH AND WEST OF THE LOWS CENTER. SUSPECT THE MOST ACTIVE LOCATIONS
FOR CONVECTION TODAY WILL BE ACROSS THE MOUNTAINS OF CLARK
COUNTY...NORTHERN MOHAVE COUNTY...AND EASTERN SAN BERNARDINO COUNTY
WHERE THE BEST COMBINATION OF INSTABILITY...MOISTURE...AND DYNAMICS
WILL BE IN PLACE. GIVEN THE DEGREE OF INSTABILITY AND UPPER LEVEL
SUPPORT FROM THE LOW...EVEN THE VALLEYS WILL BE SUSCEPTIBLE TO
SHOWERS AND ISOLATED THUNDERSTORMS.

THE FIRST LOW WILL MOVE EAST THURSDAY NIGHT ONLY TO BE REPLACED BY
ANOTHER RIPPLE IN THE FLOW MOVING THROUGH FRIDAY. THIS SECOND
DISTURBANCE WILL KEEP THE UNSETTLED AND SHOWERY WEATHER AROUND BUT
WILL FAVOR OUR SOUTHERN GREAT BASIN ZONES AND MOHAVE COUNTY MORE
THAN THE MOJAVE DESERT ZONES. THIS MEANS THE GREATEST CHANCES FOR
RAIN ON FRIDAY WILL BE NORTH AND EAST OF LAS VEGAS.

THE THIRD AND FINAL DISTURBANCE WILL APPROACH SATURDAY AS A FAIRLY
STRONG CLOSED LOW DEVELOPS OVER EASTERN OREGON AND ZIPS SOUTHWARD
ACROSS THE GREAT BASIN AND INTO NORTHERN ARIZONA BY SUNDAY MORNING.
WHILE THIS IS USUALLY A DRY TRAJECTORY THERE WILL BE PLENTY OF
RESIDUAL MOISTURE AND INSTABILITY LEFT BEHIND FROM PREVIOUS
DISTURBANCES FOR THIS FINAL SYSTEM TO WORK WITH. SATURDAY SHOWER AND
STORM CHANCES WILL BE FAIRLY HIGH ACROSS THE SOUTHERN GREAT BASIN
WHERE FORECAST MODELS TARGET LINCOLN COUNTY WITH A FAIRLY HEALTHY
SWATH OF RAINFALL IN EXCESS A QUARTER OF AN INCH. THIS BAND WILL
TRACK SOUTH AND EAST OVERNIGHT WITH SOME SHOWERS POSSIBLE MAINLY
EAST OF THE CALIFORNIA STATE LINE.  WE WILL ALSO HAVE SOME WIND TO
CONTEND WITH AS THIS FINAL LOW DRAGS A FAIRLY STRONG COLD FRONT AND
TIGHT PRESSURE GRADIENT SOUTHWARD WITH IT....SO WIND HEADLINES ARE
VERY POSSIBLE SATURDAY ACROSS PARTS OF SAN BERNARDINO COUNTY...WITH
GUSTY WINDS POSSIBLE ELSEWHERE TOO.

.LONG TERM...SUNDAY MORNING THROUGH THURSDAY.

SUSTAINED NORTH WINDS OF 15 TO 25 MPH WITH GUSTS UP TO 35 MPH WILL
DEVELOP OVER MOST OF THE FORECAST AREA EARLY SUNDAY BEHIND THE FINAL
UPPER LOW OF THE SERIES...WHICH WILL BE PULLING AWAY ACROSS ARIZONA
DURING THE DAY. THE CENTER OF THE CLOSED SYSTEM IS FORECAST TO DIVE
DOWN THROUGH SOUTHERN UTAH INTO ARIZONA SUNDAY MORNING WITH ENOUGH
MOISTURE AND COLD POOL INSTABILITY TO PRODUCE ISOLATED TO SCATTERED
SHOWERS OVER PRIMARILY EASTERN LINCOLN AND MOHAVE COUNTIES BETWEEN
12Z AND 18Z SUNDAY. DEEP NORTHERLY FLOW AND SUBSIDENCE ON THE BACK
SIDE OF THE SYSTEM WILL KEEP BREEZY TO WINDY CONDITIONS GOING
AREAWIDE SUNDAY...AND GUSTS OVER 40 MPH WILL BE POSSIBLE IN
FAVORABLE NORTH/SOUTH CHANNELS LIKE PARTS OF THE COLORADO RIVER
VALLEY. NORTH WINDS WILL DECREASE SUNDAY NIGHT AND MONDAY AS AN
EASTERN PACIFIC RIDGE ALOFT BEGINS TO NOSE INTO THE WESTERN MOJAVE
DESERT AND GREAT BASIN MONDAY THROUGH THE MIDDLE OF NEXT WEEK. THIS
WILL LEAD TO TEMPERATURES CLIMBING BACK ABOVE NORMAL WITH READINGS
OF 90 TO 100 DEGREES OVER THE MOJAVE DESERT AND COLORADO RIVER
VALLEY BY MID WEEK.

&&

.AVIATION...FOR MCCARRAN...GENERALLY SOUTHERLY WINDS OF 8 TO 12 KTS
EXPECTED THURSDAY AFTER 18Z. SHOWERS AND THUNDERSTORMS DEVELOPING IN
THE VICINITY DURING THE AFTERNOON WILL LEAD TO PERIODS OF ERRATIC
AND GUSTY WINDS NEAR THE AIRFIELD. SHOWERS AND THUNDERSTORMS SOUTH
AND WEST OF THE AIRFIELD MAY IMPACT THOSE AIR TRAFFIC CORRIDORS AT
TIMES.  LOCALLY STRONG UPDRAFTS AND CONVECTIVE TURBULENCE POSSIBLE
NEAR SHOWER ACTIVITY WITH CIGS IN THE 8-10K FT RANGE EXPECTED.
IMPROVING CONDITIONS EXPECTED AFTER 3Z FRIDAY WITH CLOUDS SCATTERING
OUT AND SHOWERS DIMINISHING.

.FOR THE REST OF SOUTHERN NEVADA...NORTHWEST ARIZONA...AND SOUTHEAST
CALIFORNIA...UNSETTLED WEATHER CONDITIONS EXPECTED WITH SCATTERED
SHOWERS AND ISOLATED THUNDERSTORMS EXPECTED. LOCALLY STRONG UPDRAFTS
AND CONVECTIVE TURBULENCE POSSIBLE NEAR SHOWER ACTIVITY AS WELL AS
GUSTY AND ERRATIC SURFACE WINDS. CLOUD BASES EXPECTED TO BE IN THE 7
TO 10K FT RANGE. SHOWERS AND THUNDERSTORMS WILL GRADUALLY DIMINISH
IN THE LATE EVENING HOURS THOUGH A FEW STRAY SHOWERS MAY PERSIST
INTO THE NIGHT.

&&

.SPOTTER INFORMATION STATEMENT...SPOTTERS SHOULD REPORT ACCORDING TO
STANDARD OPERATING PROCEDURES.

&&

$$

SHORT TERM/AVIATION...OUTLER
LONG TERM...ADAIR

FOR MORE FORECAST INFORMATION...SEE US ON OUR WEBPAGE:

HTTP://WEATHER.GOV/LASVEGAS OR FOLLOW US ON FACEBOOK AND TWITTER





000
FXUS65 KVEF 230942
AFDVEF

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
240 AM PDT THU APR 23 2015

.SYNOPSIS...A SERIES OF UPPER LEVEL DISTURBANCES WILL KEEP
RELATIVELY COOL WEATHER WITH ISOLATED TO SCATTERED SHOWERS AND
THUNDERSTORMS IN THE FORECAST THROUGH SATURDAY NIGHT. HIGH PRESSURE
WILL BUILD IN BY EARLY NEXT WEEK LEADING TO DRY CONDITIONS AND A
WARMING TREND.

&&

.SHORT TERM...THROUGH SATURDAY NIGHT.

UNSETTLED WEATHER PATTERN WILL CONTINUE THROUGH SATURDAY AS A SERIES
OF UPPER LEVEL DISTURBANCES TRAVERSE THE AREA. THE FIRST LOW HAS
BEEN RESPONSIBLE FOR THE PAST COUPLE DAYS OF ACTIVE WEATHER ACROSS
THE REGION AND THURSDAY WILL BE NO EXCEPTION AS THE LOW SPINS ACROSS
THE MOJAVE DESERT. BY THIS AFTERNOON THE LOW WILL BE CENTERED NEAR
NEEDLES WITH SCATTERED SHOWERS AND THUNDERSTORMS EXPECTED ESPECIALLY
NORTH AND WEST OF THE LOWS CENTER. SUSPECT THE MOST ACTIVE LOCATIONS
FOR CONVECTION TODAY WILL BE ACROSS THE MOUNTAINS OF CLARK
COUNTY...NORTHERN MOHAVE COUNTY...AND EASTERN SAN BERNARDINO COUNTY
WHERE THE BEST COMBINATION OF INSTABILITY...MOISTURE...AND DYNAMICS
WILL BE IN PLACE. GIVEN THE DEGREE OF INSTABILITY AND UPPER LEVEL
SUPPORT FROM THE LOW...EVEN THE VALLEYS WILL BE SUSCEPTIBLE TO
SHOWERS AND ISOLATED THUNDERSTORMS.

THE FIRST LOW WILL MOVE EAST THURSDAY NIGHT ONLY TO BE REPLACED BY
ANOTHER RIPPLE IN THE FLOW MOVING THROUGH FRIDAY. THIS SECOND
DISTURBANCE WILL KEEP THE UNSETTLED AND SHOWERY WEATHER AROUND BUT
WILL FAVOR OUR SOUTHERN GREAT BASIN ZONES AND MOHAVE COUNTY MORE
THAN THE MOJAVE DESERT ZONES. THIS MEANS THE GREATEST CHANCES FOR
RAIN ON FRIDAY WILL BE NORTH AND EAST OF LAS VEGAS.

THE THIRD AND FINAL DISTURBANCE WILL APPROACH SATURDAY AS A FAIRLY
STRONG CLOSED LOW DEVELOPS OVER EASTERN OREGON AND ZIPS SOUTHWARD
ACROSS THE GREAT BASIN AND INTO NORTHERN ARIZONA BY SUNDAY MORNING.
WHILE THIS IS USUALLY A DRY TRAJECTORY THERE WILL BE PLENTY OF
RESIDUAL MOISTURE AND INSTABILITY LEFT BEHIND FROM PREVIOUS
DISTURBANCES FOR THIS FINAL SYSTEM TO WORK WITH. SATURDAY SHOWER AND
STORM CHANCES WILL BE FAIRLY HIGH ACROSS THE SOUTHERN GREAT BASIN
WHERE FORECAST MODELS TARGET LINCOLN COUNTY WITH A FAIRLY HEALTHY
SWATH OF RAINFALL IN EXCESS A QUARTER OF AN INCH. THIS BAND WILL
TRACK SOUTH AND EAST OVERNIGHT WITH SOME SHOWERS POSSIBLE MAINLY
EAST OF THE CALIFORNIA STATE LINE.  WE WILL ALSO HAVE SOME WIND TO
CONTEND WITH AS THIS FINAL LOW DRAGS A FAIRLY STRONG COLD FRONT AND
TIGHT PRESSURE GRADIENT SOUTHWARD WITH IT....SO WIND HEADLINES ARE
VERY POSSIBLE SATURDAY ACROSS PARTS OF SAN BERNARDINO COUNTY...WITH
GUSTY WINDS POSSIBLE ELSEWHERE TOO.

.LONG TERM...SUNDAY MORNING THROUGH THURSDAY.

SUSTAINED NORTH WINDS OF 15 TO 25 MPH WITH GUSTS UP TO 35 MPH WILL
DEVELOP OVER MOST OF THE FORECAST AREA EARLY SUNDAY BEHIND THE FINAL
UPPER LOW OF THE SERIES...WHICH WILL BE PULLING AWAY ACROSS ARIZONA
DURING THE DAY. THE CENTER OF THE CLOSED SYSTEM IS FORECAST TO DIVE
DOWN THROUGH SOUTHERN UTAH INTO ARIZONA SUNDAY MORNING WITH ENOUGH
MOISTURE AND COLD POOL INSTABILITY TO PRODUCE ISOLATED TO SCATTERED
SHOWERS OVER PRIMARILY EASTERN LINCOLN AND MOHAVE COUNTIES BETWEEN
12Z AND 18Z SUNDAY. DEEP NORTHERLY FLOW AND SUBSIDENCE ON THE BACK
SIDE OF THE SYSTEM WILL KEEP BREEZY TO WINDY CONDITIONS GOING
AREAWIDE SUNDAY...AND GUSTS OVER 40 MPH WILL BE POSSIBLE IN
FAVORABLE NORTH/SOUTH CHANNELS LIKE PARTS OF THE COLORADO RIVER
VALLEY. NORTH WINDS WILL DECREASE SUNDAY NIGHT AND MONDAY AS AN
EASTERN PACIFIC RIDGE ALOFT BEGINS TO NOSE INTO THE WESTERN MOJAVE
DESERT AND GREAT BASIN MONDAY THROUGH THE MIDDLE OF NEXT WEEK. THIS
WILL LEAD TO TEMPERATURES CLIMBING BACK ABOVE NORMAL WITH READINGS
OF 90 TO 100 DEGREES OVER THE MOJAVE DESERT AND COLORADO RIVER
VALLEY BY MID WEEK.

&&

.AVIATION...FOR MCCARRAN...GENERALLY SOUTHERLY WINDS OF 8 TO 12 KTS
EXPECTED THURSDAY AFTER 18Z. SHOWERS AND THUNDERSTORMS DEVELOPING IN
THE VICINITY DURING THE AFTERNOON WILL LEAD TO PERIODS OF ERRATIC
AND GUSTY WINDS NEAR THE AIRFIELD. SHOWERS AND THUNDERSTORMS SOUTH
AND WEST OF THE AIRFIELD MAY IMPACT THOSE AIR TRAFFIC CORRIDORS AT
TIMES.  LOCALLY STRONG UPDRAFTS AND CONVECTIVE TURBULENCE POSSIBLE
NEAR SHOWER ACTIVITY WITH CIGS IN THE 8-10K FT RANGE EXPECTED.
IMPROVING CONDITIONS EXPECTED AFTER 3Z FRIDAY WITH CLOUDS SCATTERING
OUT AND SHOWERS DIMINISHING.

.FOR THE REST OF SOUTHERN NEVADA...NORTHWEST ARIZONA...AND SOUTHEAST
CALIFORNIA...UNSETTLED WEATHER CONDITIONS EXPECTED WITH SCATTERED
SHOWERS AND ISOLATED THUNDERSTORMS EXPECTED. LOCALLY STRONG UPDRAFTS
AND CONVECTIVE TURBULENCE POSSIBLE NEAR SHOWER ACTIVITY AS WELL AS
GUSTY AND ERRATIC SURFACE WINDS. CLOUD BASES EXPECTED TO BE IN THE 7
TO 10K FT RANGE. SHOWERS AND THUNDERSTORMS WILL GRADUALLY DIMINISH
IN THE LATE EVENING HOURS THOUGH A FEW STRAY SHOWERS MAY PERSIST
INTO THE NIGHT.

&&

.SPOTTER INFORMATION STATEMENT...SPOTTERS SHOULD REPORT ACCORDING TO
STANDARD OPERATING PROCEDURES.

&&

$$

SHORT TERM/AVIATION...OUTLER
LONG TERM...ADAIR

FOR MORE FORECAST INFORMATION...SEE US ON OUR WEBPAGE:

HTTP://WEATHER.GOV/LASVEGAS OR FOLLOW US ON FACEBOOK AND TWITTER




000
FXUS65 KVEF 230326
AFDVEF

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
825 PM PDT WED APR 22 2015

.SYNOPSIS...A SERIES OF UPPER LEVEL DISTURBANCES WILL KEEP
RELATIVELY COOL WEATHER WITH ISOLATED TO SCATTERED SHOWERS AND
THUNDERSTORMS IN THE FORECAST THROUGH SATURDAY NIGHT. HIGH PRESSURE
WILL BUILD IN BY EARLY NEXT WEEK LEADING TO DRY CONDITIONS AND A
WARMING TREND.
&&

.UPDATE...MOST OF THE SHOWER AND ISOLATED THUNDERSTORM ACTIVITY
ACROSS THE AREA IS WINDING DOWN THIS EVENING. PERSISTENT AREA OF
THUNDERSTORMS HAS AFFECTED WESTERN SAN BERNARDINO COUNTY FOR MUCH OF
THE EVENING BUT LOOKS TO BE FINISHING UP WITH A STRONG OUTFLOW
BOUNDARY PUSHING AWAY THE STRONGEST CONVECTION AND LIGHTNING STRIKES
ON A DOWNWARD TREND.

INCREASING STABILITY OVERNIGHT WILL AID IN LIMITING OVERNIGHT
ACTIVITY BUT WITH THE LOW SPINNING OVER SOUTHERN CALIFORNIA IT WILL
BE HARD TO COMPLETELY RULE OUT A STRAY SHOWER OR STORM OVER THE
MOJAVE DESERT AND PARTS OF SOUTHERN NEVADA WEST OF LAS VEGAS. THE
CURRENT FORECAST LOOKS TO BE IN GOOD SHAPE AND NO UPDATES ARE
PLANNED.

-OUTLER-

&&

.SHORT TERM...THROUGH FRIDAY NIGHT.

ONE UPPER LOW WAS SPINNING OVER NORTHWEST SAN BERNARDINO AND
SOUTHWEST INYO COUNTIES THIS AFTERNOON. THE MOST ACTIVE OR STRONGEST
CONVECTION WAS NEAR AND NORTH OF THE LOW CENTER ABOUT AS EXPECTED.
WEAKER CONVECTION WAS NOTED EAST OF THERE WITH JUST ABOUT NOTHING
GOING ON FARTHER EAST IN MOHAVE COUNTY. A SECOND LOW WAS DROPPING
SOUTH OFF THE COAST AND WILL MERGE WITH THE FIRST LOW TONIGHT ACROSS
SOUTHERN CALIFORNIA INTO WESTERN NEVADA. THIS WILL KEEP A CHANCE OF
SHOWERS AND EVENING THUNDERSTORMS TONIGHT OVER SOUTHEAST CALIFORNIA
AND FROM A LAS VEGAS TO RACHEL LINE WESTWARD IN SOUTHERN NEVADA.
MODELS CONTINUE TO INDICATE A FAIRLY SHARP MOISTURE BOUNDARY WITH
PRETTY DRY AND STABLE AIR PERSISTING OVER EASTERN PORTIONS OF THE
FORECAST AREA. THE LOW PRESSURE SYSTEM WILL MOVE SLOWLY EAST TO
SOUTHERN NEVADA AND EXTENDING SOUTH ALONG THE COLORADO RIVER
THURSDAY. THIS WILL LEAD TO A CHANCE OF SHOWERS AND THUNDERSTORMS
AREA WIDE WITH TEMPERATURES SEVERAL DEGREES BELOW NORMAL. STILL NOT
LOOKING FOR A WIDESPREAD SOAKING RAIN EVENT BUT MEASURABLE
PRECIPITATION CANNOT BE RULED OUT IN ANY PARTICULAR LOCATION. THE
BEST CHANCES FOR ANY DECENT PRECIPITATION WILL BE OVER THE
MOUNTAINS. THE UPPER LOW WILL MOVE EAST OF THE AREA THURSDAY NIGHT
BUT ANOTHER SHORTWAVE WILL FOLLOW QUICKLY ON IT`S HEELS LATE
THURSDAY NIGHT AND FRIDAY. THIS WILL KEEP AT LEAST A SLIGHT CHANCE
OF SHOWERS OVER MOST OF THE FORECAST AREA. YET ANOTHER SHORTWAVE
WILL PUSH INTO NORTHWEST NEVADA BY FRIDAY NIGHT KEEPING A CHANCE OF
SHOWERS GOING...MAINLY ACROSS LINCOLN...NYE.ESMERALDA AND NORTHERN
INYO COUNTIES.


.LONG TERM...SATURDAY MORNING THROUGH WEDNESDAY.

MODELS ARE IN GOOD AGREEMENT EARLY IN THE EXTENDED PERIOD AS A
FAIRLY STRONG TROUGH AND ASSOCIATED COLD FRONT MOVE THROUGH THE AREA
SATURDAY. TYPICALLY THIS TIME OF YEAR MANY OF THESE TROUGHS ARE
FAIRLY DRY FOR OUR AREA...HOWEVER THIS SYSTEM IS EXPECTED TO BRING
IN PLENTY OF MOISTURE AND BRING FAIRLY WIDESPREAD SHOWERS AND
THUNDERSTORMS OVER AT LEAST ESMERALDA...CENTRAL NYE AND LINCOLN
COUNTIES SATURDAY AND SATURDAY NIGHT. MOST OF THE RAINFALL IS
EXPECTED TO BE ASSOCIATED AHEAD AND BEHIND A COLD FRONT THAT WILL
MOVE THROUGH THE REGION DURING THE DAY. THE GFS IN PARTICULAR SHOWED
STRONG FRONTOGENENIS ACROSS CENTRAL NYE AND LINCOLN COUNTIES AND
THIS IS WHERE THE HEAVIEST RAINFALL IS EXPECTED ALONG WITH THE BEST
INSTABILITY. HAVE GONE AHEAD AND INCREASED POPS QUITE A BIT IN THESE
AREAS. HAVE ALSO INCREASED POPS SLIGHTLY OVER THE SOUTHERN HALF OF
THE AREA...BUT RIGHT NOW IT LOOKS LIKE MOST OF THE RAINFALL AND
THUNDERSTORM ACTIVITY WILL REMAIN OVER THE NORTHERN HALF OF THE
AREA. GUSTY WINDS ARE EXPECTED TO OCCUR OVER SAN BERNARDINO AND
MOHAVE COUNTIES SATURDAY AND WIND ADVISORIES MAY BE
NEEDED...ESPECIALLY OVER WESTERN SAN BERNARDINO COUNTY WHERE GUSTS
COULD EXCEED 40 MPH. THIS TROUGH IS FORECAST TO QUICKLY EXIT THE
AREA SATURDAY NIGHT WITH ONLY THE EXTREME EASTERN AREAS SEEING A
CHANCE OF PRECIPITATION EARLY SUNDAY MORNING. SUNDAY IS EXPECTED TO
BE DRY...BUT GUSTY NORTH WINDS LOOK TO OCCUR OVER MOST OF THE AREA
AND MAY BE STRONG ENOUGH IN SOME LOCATIONS TO WARRANT WIND
ADVISORIES...ESPECIALLY DOWN THE COLORADO RIVER. THE COOLEST
TEMPERATURES ARE EXPECTED SATURDAY WITH READINGS 8-10 DEGREES BELOW
NORMAL. SUNDAY WILL SEE A SLIGHT INCREASE IN TEMPERATURES WITH
ADDITIONAL WARMING OCCURRING MONDAY THROUGH WEDNESDAY AS HIGH
PRESSURE MOVES INTO THE REGION AND BRINGS DRIER CONDITIONS AND
LIGHTER WINDS. &&

.AVIATION...FOR MCCARRAN...PREDOMINANTLY SOUTH/SOUTHEAST WINDS 8-12
KNOTS ARE EXPECTED THROUGH EARLY EVENING. HOWEVER...ANY SHOWERS IN
THE AREA COULD CAUSE WINDS TO BECOME ERRATIC AT TIMES.
SOUTH/SOUTHWEST WINDS UP TO 10 KNOTS ARE THEN EXPECTED LATE EVENING
AND OVERNIGHT BEFORE BECOMING LIGHT AND VARIABLE BY MID THURSDAY
MORNING. WINDS MUCH OF THURSDAY AFTERNOON SHOULD BE FROM THE
SOUTHEAST UP TO 10 KNOTS. DUE TO THE PROXIMITY OF AN UPPER LEVEL LOW
PRESSURE SYSTEM ISOLATED SHOWERS ARE POSSIBLE THROUGH TONIGHT WITH
CLOUD BASES SCT-BKN100-120 KFT. MORE CLOUD COVER AND A BETTER CHANCE
OF SHOWERS WITH ISOLATED THUNDERSTORMS IS EXPECTED THURSDAY.

.FOR THE REST OF SOUTHERN NEVADA...NORTHWEST ARIZONA...AND SOUTHEAST
CALIFORNIA...MAINLY SOUTH WINDS ARE EXPECTED AT 7-14 KTS WITH GUSTS
20 TO 25 KTS THROUGH THURSDAY. THE EXCEPTION WILL BE ERRATIC
DIRECTIONS AND STRONGER GUSTS NEAR ANY ISOLATED SHRA/TSRA WHICH WILL
BE AROUND. THE SHOWERS AND THUNDERSTORMS WILL BE LIMITED TO ROUGHLY
WEST OF LAS VEGAS TONIGHT THEN AREA WIDE THURSDAY. CLOUD BASES WILL
BE DOWN AS LOW AS 6K-10K FEET NEAR SHRA/TSRA OTHERWISE MAINLY 12K-
18K FEET. &&

.SPOTTER INFORMATION STATEMENT...SPOTTERS SHOULD REPORT ACCORDING TO
STANDARD OPERATING PROCEDURES.
&&

$$

SHORT TERM/AVIATION...HARRISON
LONG TERM...GORELOW

FOR MORE FORECAST INFORMATION...SEE US ON OUR WEBPAGE:

HTTP://WEATHER.GOV/LASVEGAS OR FOLLOW US ON FACEBOOK AND TWITTER




000
FXUS65 KVEF 230326
AFDVEF

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
825 PM PDT WED APR 22 2015

.SYNOPSIS...A SERIES OF UPPER LEVEL DISTURBANCES WILL KEEP
RELATIVELY COOL WEATHER WITH ISOLATED TO SCATTERED SHOWERS AND
THUNDERSTORMS IN THE FORECAST THROUGH SATURDAY NIGHT. HIGH PRESSURE
WILL BUILD IN BY EARLY NEXT WEEK LEADING TO DRY CONDITIONS AND A
WARMING TREND.
&&

.UPDATE...MOST OF THE SHOWER AND ISOLATED THUNDERSTORM ACTIVITY
ACROSS THE AREA IS WINDING DOWN THIS EVENING. PERSISTENT AREA OF
THUNDERSTORMS HAS AFFECTED WESTERN SAN BERNARDINO COUNTY FOR MUCH OF
THE EVENING BUT LOOKS TO BE FINISHING UP WITH A STRONG OUTFLOW
BOUNDARY PUSHING AWAY THE STRONGEST CONVECTION AND LIGHTNING STRIKES
ON A DOWNWARD TREND.

INCREASING STABILITY OVERNIGHT WILL AID IN LIMITING OVERNIGHT
ACTIVITY BUT WITH THE LOW SPINNING OVER SOUTHERN CALIFORNIA IT WILL
BE HARD TO COMPLETELY RULE OUT A STRAY SHOWER OR STORM OVER THE
MOJAVE DESERT AND PARTS OF SOUTHERN NEVADA WEST OF LAS VEGAS. THE
CURRENT FORECAST LOOKS TO BE IN GOOD SHAPE AND NO UPDATES ARE
PLANNED.

-OUTLER-

&&

.SHORT TERM...THROUGH FRIDAY NIGHT.

ONE UPPER LOW WAS SPINNING OVER NORTHWEST SAN BERNARDINO AND
SOUTHWEST INYO COUNTIES THIS AFTERNOON. THE MOST ACTIVE OR STRONGEST
CONVECTION WAS NEAR AND NORTH OF THE LOW CENTER ABOUT AS EXPECTED.
WEAKER CONVECTION WAS NOTED EAST OF THERE WITH JUST ABOUT NOTHING
GOING ON FARTHER EAST IN MOHAVE COUNTY. A SECOND LOW WAS DROPPING
SOUTH OFF THE COAST AND WILL MERGE WITH THE FIRST LOW TONIGHT ACROSS
SOUTHERN CALIFORNIA INTO WESTERN NEVADA. THIS WILL KEEP A CHANCE OF
SHOWERS AND EVENING THUNDERSTORMS TONIGHT OVER SOUTHEAST CALIFORNIA
AND FROM A LAS VEGAS TO RACHEL LINE WESTWARD IN SOUTHERN NEVADA.
MODELS CONTINUE TO INDICATE A FAIRLY SHARP MOISTURE BOUNDARY WITH
PRETTY DRY AND STABLE AIR PERSISTING OVER EASTERN PORTIONS OF THE
FORECAST AREA. THE LOW PRESSURE SYSTEM WILL MOVE SLOWLY EAST TO
SOUTHERN NEVADA AND EXTENDING SOUTH ALONG THE COLORADO RIVER
THURSDAY. THIS WILL LEAD TO A CHANCE OF SHOWERS AND THUNDERSTORMS
AREA WIDE WITH TEMPERATURES SEVERAL DEGREES BELOW NORMAL. STILL NOT
LOOKING FOR A WIDESPREAD SOAKING RAIN EVENT BUT MEASURABLE
PRECIPITATION CANNOT BE RULED OUT IN ANY PARTICULAR LOCATION. THE
BEST CHANCES FOR ANY DECENT PRECIPITATION WILL BE OVER THE
MOUNTAINS. THE UPPER LOW WILL MOVE EAST OF THE AREA THURSDAY NIGHT
BUT ANOTHER SHORTWAVE WILL FOLLOW QUICKLY ON IT`S HEELS LATE
THURSDAY NIGHT AND FRIDAY. THIS WILL KEEP AT LEAST A SLIGHT CHANCE
OF SHOWERS OVER MOST OF THE FORECAST AREA. YET ANOTHER SHORTWAVE
WILL PUSH INTO NORTHWEST NEVADA BY FRIDAY NIGHT KEEPING A CHANCE OF
SHOWERS GOING...MAINLY ACROSS LINCOLN...NYE.ESMERALDA AND NORTHERN
INYO COUNTIES.


.LONG TERM...SATURDAY MORNING THROUGH WEDNESDAY.

MODELS ARE IN GOOD AGREEMENT EARLY IN THE EXTENDED PERIOD AS A
FAIRLY STRONG TROUGH AND ASSOCIATED COLD FRONT MOVE THROUGH THE AREA
SATURDAY. TYPICALLY THIS TIME OF YEAR MANY OF THESE TROUGHS ARE
FAIRLY DRY FOR OUR AREA...HOWEVER THIS SYSTEM IS EXPECTED TO BRING
IN PLENTY OF MOISTURE AND BRING FAIRLY WIDESPREAD SHOWERS AND
THUNDERSTORMS OVER AT LEAST ESMERALDA...CENTRAL NYE AND LINCOLN
COUNTIES SATURDAY AND SATURDAY NIGHT. MOST OF THE RAINFALL IS
EXPECTED TO BE ASSOCIATED AHEAD AND BEHIND A COLD FRONT THAT WILL
MOVE THROUGH THE REGION DURING THE DAY. THE GFS IN PARTICULAR SHOWED
STRONG FRONTOGENENIS ACROSS CENTRAL NYE AND LINCOLN COUNTIES AND
THIS IS WHERE THE HEAVIEST RAINFALL IS EXPECTED ALONG WITH THE BEST
INSTABILITY. HAVE GONE AHEAD AND INCREASED POPS QUITE A BIT IN THESE
AREAS. HAVE ALSO INCREASED POPS SLIGHTLY OVER THE SOUTHERN HALF OF
THE AREA...BUT RIGHT NOW IT LOOKS LIKE MOST OF THE RAINFALL AND
THUNDERSTORM ACTIVITY WILL REMAIN OVER THE NORTHERN HALF OF THE
AREA. GUSTY WINDS ARE EXPECTED TO OCCUR OVER SAN BERNARDINO AND
MOHAVE COUNTIES SATURDAY AND WIND ADVISORIES MAY BE
NEEDED...ESPECIALLY OVER WESTERN SAN BERNARDINO COUNTY WHERE GUSTS
COULD EXCEED 40 MPH. THIS TROUGH IS FORECAST TO QUICKLY EXIT THE
AREA SATURDAY NIGHT WITH ONLY THE EXTREME EASTERN AREAS SEEING A
CHANCE OF PRECIPITATION EARLY SUNDAY MORNING. SUNDAY IS EXPECTED TO
BE DRY...BUT GUSTY NORTH WINDS LOOK TO OCCUR OVER MOST OF THE AREA
AND MAY BE STRONG ENOUGH IN SOME LOCATIONS TO WARRANT WIND
ADVISORIES...ESPECIALLY DOWN THE COLORADO RIVER. THE COOLEST
TEMPERATURES ARE EXPECTED SATURDAY WITH READINGS 8-10 DEGREES BELOW
NORMAL. SUNDAY WILL SEE A SLIGHT INCREASE IN TEMPERATURES WITH
ADDITIONAL WARMING OCCURRING MONDAY THROUGH WEDNESDAY AS HIGH
PRESSURE MOVES INTO THE REGION AND BRINGS DRIER CONDITIONS AND
LIGHTER WINDS. &&

.AVIATION...FOR MCCARRAN...PREDOMINANTLY SOUTH/SOUTHEAST WINDS 8-12
KNOTS ARE EXPECTED THROUGH EARLY EVENING. HOWEVER...ANY SHOWERS IN
THE AREA COULD CAUSE WINDS TO BECOME ERRATIC AT TIMES.
SOUTH/SOUTHWEST WINDS UP TO 10 KNOTS ARE THEN EXPECTED LATE EVENING
AND OVERNIGHT BEFORE BECOMING LIGHT AND VARIABLE BY MID THURSDAY
MORNING. WINDS MUCH OF THURSDAY AFTERNOON SHOULD BE FROM THE
SOUTHEAST UP TO 10 KNOTS. DUE TO THE PROXIMITY OF AN UPPER LEVEL LOW
PRESSURE SYSTEM ISOLATED SHOWERS ARE POSSIBLE THROUGH TONIGHT WITH
CLOUD BASES SCT-BKN100-120 KFT. MORE CLOUD COVER AND A BETTER CHANCE
OF SHOWERS WITH ISOLATED THUNDERSTORMS IS EXPECTED THURSDAY.

.FOR THE REST OF SOUTHERN NEVADA...NORTHWEST ARIZONA...AND SOUTHEAST
CALIFORNIA...MAINLY SOUTH WINDS ARE EXPECTED AT 7-14 KTS WITH GUSTS
20 TO 25 KTS THROUGH THURSDAY. THE EXCEPTION WILL BE ERRATIC
DIRECTIONS AND STRONGER GUSTS NEAR ANY ISOLATED SHRA/TSRA WHICH WILL
BE AROUND. THE SHOWERS AND THUNDERSTORMS WILL BE LIMITED TO ROUGHLY
WEST OF LAS VEGAS TONIGHT THEN AREA WIDE THURSDAY. CLOUD BASES WILL
BE DOWN AS LOW AS 6K-10K FEET NEAR SHRA/TSRA OTHERWISE MAINLY 12K-
18K FEET. &&

.SPOTTER INFORMATION STATEMENT...SPOTTERS SHOULD REPORT ACCORDING TO
STANDARD OPERATING PROCEDURES.
&&

$$

SHORT TERM/AVIATION...HARRISON
LONG TERM...GORELOW

FOR MORE FORECAST INFORMATION...SEE US ON OUR WEBPAGE:

HTTP://WEATHER.GOV/LASVEGAS OR FOLLOW US ON FACEBOOK AND TWITTER





000
FXUS65 KVEF 230326
AFDVEF

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
825 PM PDT WED APR 22 2015

.SYNOPSIS...A SERIES OF UPPER LEVEL DISTURBANCES WILL KEEP
RELATIVELY COOL WEATHER WITH ISOLATED TO SCATTERED SHOWERS AND
THUNDERSTORMS IN THE FORECAST THROUGH SATURDAY NIGHT. HIGH PRESSURE
WILL BUILD IN BY EARLY NEXT WEEK LEADING TO DRY CONDITIONS AND A
WARMING TREND.
&&

.UPDATE...MOST OF THE SHOWER AND ISOLATED THUNDERSTORM ACTIVITY
ACROSS THE AREA IS WINDING DOWN THIS EVENING. PERSISTENT AREA OF
THUNDERSTORMS HAS AFFECTED WESTERN SAN BERNARDINO COUNTY FOR MUCH OF
THE EVENING BUT LOOKS TO BE FINISHING UP WITH A STRONG OUTFLOW
BOUNDARY PUSHING AWAY THE STRONGEST CONVECTION AND LIGHTNING STRIKES
ON A DOWNWARD TREND.

INCREASING STABILITY OVERNIGHT WILL AID IN LIMITING OVERNIGHT
ACTIVITY BUT WITH THE LOW SPINNING OVER SOUTHERN CALIFORNIA IT WILL
BE HARD TO COMPLETELY RULE OUT A STRAY SHOWER OR STORM OVER THE
MOJAVE DESERT AND PARTS OF SOUTHERN NEVADA WEST OF LAS VEGAS. THE
CURRENT FORECAST LOOKS TO BE IN GOOD SHAPE AND NO UPDATES ARE
PLANNED.

-OUTLER-

&&

.SHORT TERM...THROUGH FRIDAY NIGHT.

ONE UPPER LOW WAS SPINNING OVER NORTHWEST SAN BERNARDINO AND
SOUTHWEST INYO COUNTIES THIS AFTERNOON. THE MOST ACTIVE OR STRONGEST
CONVECTION WAS NEAR AND NORTH OF THE LOW CENTER ABOUT AS EXPECTED.
WEAKER CONVECTION WAS NOTED EAST OF THERE WITH JUST ABOUT NOTHING
GOING ON FARTHER EAST IN MOHAVE COUNTY. A SECOND LOW WAS DROPPING
SOUTH OFF THE COAST AND WILL MERGE WITH THE FIRST LOW TONIGHT ACROSS
SOUTHERN CALIFORNIA INTO WESTERN NEVADA. THIS WILL KEEP A CHANCE OF
SHOWERS AND EVENING THUNDERSTORMS TONIGHT OVER SOUTHEAST CALIFORNIA
AND FROM A LAS VEGAS TO RACHEL LINE WESTWARD IN SOUTHERN NEVADA.
MODELS CONTINUE TO INDICATE A FAIRLY SHARP MOISTURE BOUNDARY WITH
PRETTY DRY AND STABLE AIR PERSISTING OVER EASTERN PORTIONS OF THE
FORECAST AREA. THE LOW PRESSURE SYSTEM WILL MOVE SLOWLY EAST TO
SOUTHERN NEVADA AND EXTENDING SOUTH ALONG THE COLORADO RIVER
THURSDAY. THIS WILL LEAD TO A CHANCE OF SHOWERS AND THUNDERSTORMS
AREA WIDE WITH TEMPERATURES SEVERAL DEGREES BELOW NORMAL. STILL NOT
LOOKING FOR A WIDESPREAD SOAKING RAIN EVENT BUT MEASURABLE
PRECIPITATION CANNOT BE RULED OUT IN ANY PARTICULAR LOCATION. THE
BEST CHANCES FOR ANY DECENT PRECIPITATION WILL BE OVER THE
MOUNTAINS. THE UPPER LOW WILL MOVE EAST OF THE AREA THURSDAY NIGHT
BUT ANOTHER SHORTWAVE WILL FOLLOW QUICKLY ON IT`S HEELS LATE
THURSDAY NIGHT AND FRIDAY. THIS WILL KEEP AT LEAST A SLIGHT CHANCE
OF SHOWERS OVER MOST OF THE FORECAST AREA. YET ANOTHER SHORTWAVE
WILL PUSH INTO NORTHWEST NEVADA BY FRIDAY NIGHT KEEPING A CHANCE OF
SHOWERS GOING...MAINLY ACROSS LINCOLN...NYE.ESMERALDA AND NORTHERN
INYO COUNTIES.


.LONG TERM...SATURDAY MORNING THROUGH WEDNESDAY.

MODELS ARE IN GOOD AGREEMENT EARLY IN THE EXTENDED PERIOD AS A
FAIRLY STRONG TROUGH AND ASSOCIATED COLD FRONT MOVE THROUGH THE AREA
SATURDAY. TYPICALLY THIS TIME OF YEAR MANY OF THESE TROUGHS ARE
FAIRLY DRY FOR OUR AREA...HOWEVER THIS SYSTEM IS EXPECTED TO BRING
IN PLENTY OF MOISTURE AND BRING FAIRLY WIDESPREAD SHOWERS AND
THUNDERSTORMS OVER AT LEAST ESMERALDA...CENTRAL NYE AND LINCOLN
COUNTIES SATURDAY AND SATURDAY NIGHT. MOST OF THE RAINFALL IS
EXPECTED TO BE ASSOCIATED AHEAD AND BEHIND A COLD FRONT THAT WILL
MOVE THROUGH THE REGION DURING THE DAY. THE GFS IN PARTICULAR SHOWED
STRONG FRONTOGENENIS ACROSS CENTRAL NYE AND LINCOLN COUNTIES AND
THIS IS WHERE THE HEAVIEST RAINFALL IS EXPECTED ALONG WITH THE BEST
INSTABILITY. HAVE GONE AHEAD AND INCREASED POPS QUITE A BIT IN THESE
AREAS. HAVE ALSO INCREASED POPS SLIGHTLY OVER THE SOUTHERN HALF OF
THE AREA...BUT RIGHT NOW IT LOOKS LIKE MOST OF THE RAINFALL AND
THUNDERSTORM ACTIVITY WILL REMAIN OVER THE NORTHERN HALF OF THE
AREA. GUSTY WINDS ARE EXPECTED TO OCCUR OVER SAN BERNARDINO AND
MOHAVE COUNTIES SATURDAY AND WIND ADVISORIES MAY BE
NEEDED...ESPECIALLY OVER WESTERN SAN BERNARDINO COUNTY WHERE GUSTS
COULD EXCEED 40 MPH. THIS TROUGH IS FORECAST TO QUICKLY EXIT THE
AREA SATURDAY NIGHT WITH ONLY THE EXTREME EASTERN AREAS SEEING A
CHANCE OF PRECIPITATION EARLY SUNDAY MORNING. SUNDAY IS EXPECTED TO
BE DRY...BUT GUSTY NORTH WINDS LOOK TO OCCUR OVER MOST OF THE AREA
AND MAY BE STRONG ENOUGH IN SOME LOCATIONS TO WARRANT WIND
ADVISORIES...ESPECIALLY DOWN THE COLORADO RIVER. THE COOLEST
TEMPERATURES ARE EXPECTED SATURDAY WITH READINGS 8-10 DEGREES BELOW
NORMAL. SUNDAY WILL SEE A SLIGHT INCREASE IN TEMPERATURES WITH
ADDITIONAL WARMING OCCURRING MONDAY THROUGH WEDNESDAY AS HIGH
PRESSURE MOVES INTO THE REGION AND BRINGS DRIER CONDITIONS AND
LIGHTER WINDS. &&

.AVIATION...FOR MCCARRAN...PREDOMINANTLY SOUTH/SOUTHEAST WINDS 8-12
KNOTS ARE EXPECTED THROUGH EARLY EVENING. HOWEVER...ANY SHOWERS IN
THE AREA COULD CAUSE WINDS TO BECOME ERRATIC AT TIMES.
SOUTH/SOUTHWEST WINDS UP TO 10 KNOTS ARE THEN EXPECTED LATE EVENING
AND OVERNIGHT BEFORE BECOMING LIGHT AND VARIABLE BY MID THURSDAY
MORNING. WINDS MUCH OF THURSDAY AFTERNOON SHOULD BE FROM THE
SOUTHEAST UP TO 10 KNOTS. DUE TO THE PROXIMITY OF AN UPPER LEVEL LOW
PRESSURE SYSTEM ISOLATED SHOWERS ARE POSSIBLE THROUGH TONIGHT WITH
CLOUD BASES SCT-BKN100-120 KFT. MORE CLOUD COVER AND A BETTER CHANCE
OF SHOWERS WITH ISOLATED THUNDERSTORMS IS EXPECTED THURSDAY.

.FOR THE REST OF SOUTHERN NEVADA...NORTHWEST ARIZONA...AND SOUTHEAST
CALIFORNIA...MAINLY SOUTH WINDS ARE EXPECTED AT 7-14 KTS WITH GUSTS
20 TO 25 KTS THROUGH THURSDAY. THE EXCEPTION WILL BE ERRATIC
DIRECTIONS AND STRONGER GUSTS NEAR ANY ISOLATED SHRA/TSRA WHICH WILL
BE AROUND. THE SHOWERS AND THUNDERSTORMS WILL BE LIMITED TO ROUGHLY
WEST OF LAS VEGAS TONIGHT THEN AREA WIDE THURSDAY. CLOUD BASES WILL
BE DOWN AS LOW AS 6K-10K FEET NEAR SHRA/TSRA OTHERWISE MAINLY 12K-
18K FEET. &&

.SPOTTER INFORMATION STATEMENT...SPOTTERS SHOULD REPORT ACCORDING TO
STANDARD OPERATING PROCEDURES.
&&

$$

SHORT TERM/AVIATION...HARRISON
LONG TERM...GORELOW

FOR MORE FORECAST INFORMATION...SEE US ON OUR WEBPAGE:

HTTP://WEATHER.GOV/LASVEGAS OR FOLLOW US ON FACEBOOK AND TWITTER





000
FXUS65 KVEF 230326
AFDVEF

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
825 PM PDT WED APR 22 2015

.SYNOPSIS...A SERIES OF UPPER LEVEL DISTURBANCES WILL KEEP
RELATIVELY COOL WEATHER WITH ISOLATED TO SCATTERED SHOWERS AND
THUNDERSTORMS IN THE FORECAST THROUGH SATURDAY NIGHT. HIGH PRESSURE
WILL BUILD IN BY EARLY NEXT WEEK LEADING TO DRY CONDITIONS AND A
WARMING TREND.
&&

.UPDATE...MOST OF THE SHOWER AND ISOLATED THUNDERSTORM ACTIVITY
ACROSS THE AREA IS WINDING DOWN THIS EVENING. PERSISTENT AREA OF
THUNDERSTORMS HAS AFFECTED WESTERN SAN BERNARDINO COUNTY FOR MUCH OF
THE EVENING BUT LOOKS TO BE FINISHING UP WITH A STRONG OUTFLOW
BOUNDARY PUSHING AWAY THE STRONGEST CONVECTION AND LIGHTNING STRIKES
ON A DOWNWARD TREND.

INCREASING STABILITY OVERNIGHT WILL AID IN LIMITING OVERNIGHT
ACTIVITY BUT WITH THE LOW SPINNING OVER SOUTHERN CALIFORNIA IT WILL
BE HARD TO COMPLETELY RULE OUT A STRAY SHOWER OR STORM OVER THE
MOJAVE DESERT AND PARTS OF SOUTHERN NEVADA WEST OF LAS VEGAS. THE
CURRENT FORECAST LOOKS TO BE IN GOOD SHAPE AND NO UPDATES ARE
PLANNED.

-OUTLER-

&&

.SHORT TERM...THROUGH FRIDAY NIGHT.

ONE UPPER LOW WAS SPINNING OVER NORTHWEST SAN BERNARDINO AND
SOUTHWEST INYO COUNTIES THIS AFTERNOON. THE MOST ACTIVE OR STRONGEST
CONVECTION WAS NEAR AND NORTH OF THE LOW CENTER ABOUT AS EXPECTED.
WEAKER CONVECTION WAS NOTED EAST OF THERE WITH JUST ABOUT NOTHING
GOING ON FARTHER EAST IN MOHAVE COUNTY. A SECOND LOW WAS DROPPING
SOUTH OFF THE COAST AND WILL MERGE WITH THE FIRST LOW TONIGHT ACROSS
SOUTHERN CALIFORNIA INTO WESTERN NEVADA. THIS WILL KEEP A CHANCE OF
SHOWERS AND EVENING THUNDERSTORMS TONIGHT OVER SOUTHEAST CALIFORNIA
AND FROM A LAS VEGAS TO RACHEL LINE WESTWARD IN SOUTHERN NEVADA.
MODELS CONTINUE TO INDICATE A FAIRLY SHARP MOISTURE BOUNDARY WITH
PRETTY DRY AND STABLE AIR PERSISTING OVER EASTERN PORTIONS OF THE
FORECAST AREA. THE LOW PRESSURE SYSTEM WILL MOVE SLOWLY EAST TO
SOUTHERN NEVADA AND EXTENDING SOUTH ALONG THE COLORADO RIVER
THURSDAY. THIS WILL LEAD TO A CHANCE OF SHOWERS AND THUNDERSTORMS
AREA WIDE WITH TEMPERATURES SEVERAL DEGREES BELOW NORMAL. STILL NOT
LOOKING FOR A WIDESPREAD SOAKING RAIN EVENT BUT MEASURABLE
PRECIPITATION CANNOT BE RULED OUT IN ANY PARTICULAR LOCATION. THE
BEST CHANCES FOR ANY DECENT PRECIPITATION WILL BE OVER THE
MOUNTAINS. THE UPPER LOW WILL MOVE EAST OF THE AREA THURSDAY NIGHT
BUT ANOTHER SHORTWAVE WILL FOLLOW QUICKLY ON IT`S HEELS LATE
THURSDAY NIGHT AND FRIDAY. THIS WILL KEEP AT LEAST A SLIGHT CHANCE
OF SHOWERS OVER MOST OF THE FORECAST AREA. YET ANOTHER SHORTWAVE
WILL PUSH INTO NORTHWEST NEVADA BY FRIDAY NIGHT KEEPING A CHANCE OF
SHOWERS GOING...MAINLY ACROSS LINCOLN...NYE.ESMERALDA AND NORTHERN
INYO COUNTIES.


.LONG TERM...SATURDAY MORNING THROUGH WEDNESDAY.

MODELS ARE IN GOOD AGREEMENT EARLY IN THE EXTENDED PERIOD AS A
FAIRLY STRONG TROUGH AND ASSOCIATED COLD FRONT MOVE THROUGH THE AREA
SATURDAY. TYPICALLY THIS TIME OF YEAR MANY OF THESE TROUGHS ARE
FAIRLY DRY FOR OUR AREA...HOWEVER THIS SYSTEM IS EXPECTED TO BRING
IN PLENTY OF MOISTURE AND BRING FAIRLY WIDESPREAD SHOWERS AND
THUNDERSTORMS OVER AT LEAST ESMERALDA...CENTRAL NYE AND LINCOLN
COUNTIES SATURDAY AND SATURDAY NIGHT. MOST OF THE RAINFALL IS
EXPECTED TO BE ASSOCIATED AHEAD AND BEHIND A COLD FRONT THAT WILL
MOVE THROUGH THE REGION DURING THE DAY. THE GFS IN PARTICULAR SHOWED
STRONG FRONTOGENENIS ACROSS CENTRAL NYE AND LINCOLN COUNTIES AND
THIS IS WHERE THE HEAVIEST RAINFALL IS EXPECTED ALONG WITH THE BEST
INSTABILITY. HAVE GONE AHEAD AND INCREASED POPS QUITE A BIT IN THESE
AREAS. HAVE ALSO INCREASED POPS SLIGHTLY OVER THE SOUTHERN HALF OF
THE AREA...BUT RIGHT NOW IT LOOKS LIKE MOST OF THE RAINFALL AND
THUNDERSTORM ACTIVITY WILL REMAIN OVER THE NORTHERN HALF OF THE
AREA. GUSTY WINDS ARE EXPECTED TO OCCUR OVER SAN BERNARDINO AND
MOHAVE COUNTIES SATURDAY AND WIND ADVISORIES MAY BE
NEEDED...ESPECIALLY OVER WESTERN SAN BERNARDINO COUNTY WHERE GUSTS
COULD EXCEED 40 MPH. THIS TROUGH IS FORECAST TO QUICKLY EXIT THE
AREA SATURDAY NIGHT WITH ONLY THE EXTREME EASTERN AREAS SEEING A
CHANCE OF PRECIPITATION EARLY SUNDAY MORNING. SUNDAY IS EXPECTED TO
BE DRY...BUT GUSTY NORTH WINDS LOOK TO OCCUR OVER MOST OF THE AREA
AND MAY BE STRONG ENOUGH IN SOME LOCATIONS TO WARRANT WIND
ADVISORIES...ESPECIALLY DOWN THE COLORADO RIVER. THE COOLEST
TEMPERATURES ARE EXPECTED SATURDAY WITH READINGS 8-10 DEGREES BELOW
NORMAL. SUNDAY WILL SEE A SLIGHT INCREASE IN TEMPERATURES WITH
ADDITIONAL WARMING OCCURRING MONDAY THROUGH WEDNESDAY AS HIGH
PRESSURE MOVES INTO THE REGION AND BRINGS DRIER CONDITIONS AND
LIGHTER WINDS. &&

.AVIATION...FOR MCCARRAN...PREDOMINANTLY SOUTH/SOUTHEAST WINDS 8-12
KNOTS ARE EXPECTED THROUGH EARLY EVENING. HOWEVER...ANY SHOWERS IN
THE AREA COULD CAUSE WINDS TO BECOME ERRATIC AT TIMES.
SOUTH/SOUTHWEST WINDS UP TO 10 KNOTS ARE THEN EXPECTED LATE EVENING
AND OVERNIGHT BEFORE BECOMING LIGHT AND VARIABLE BY MID THURSDAY
MORNING. WINDS MUCH OF THURSDAY AFTERNOON SHOULD BE FROM THE
SOUTHEAST UP TO 10 KNOTS. DUE TO THE PROXIMITY OF AN UPPER LEVEL LOW
PRESSURE SYSTEM ISOLATED SHOWERS ARE POSSIBLE THROUGH TONIGHT WITH
CLOUD BASES SCT-BKN100-120 KFT. MORE CLOUD COVER AND A BETTER CHANCE
OF SHOWERS WITH ISOLATED THUNDERSTORMS IS EXPECTED THURSDAY.

.FOR THE REST OF SOUTHERN NEVADA...NORTHWEST ARIZONA...AND SOUTHEAST
CALIFORNIA...MAINLY SOUTH WINDS ARE EXPECTED AT 7-14 KTS WITH GUSTS
20 TO 25 KTS THROUGH THURSDAY. THE EXCEPTION WILL BE ERRATIC
DIRECTIONS AND STRONGER GUSTS NEAR ANY ISOLATED SHRA/TSRA WHICH WILL
BE AROUND. THE SHOWERS AND THUNDERSTORMS WILL BE LIMITED TO ROUGHLY
WEST OF LAS VEGAS TONIGHT THEN AREA WIDE THURSDAY. CLOUD BASES WILL
BE DOWN AS LOW AS 6K-10K FEET NEAR SHRA/TSRA OTHERWISE MAINLY 12K-
18K FEET. &&

.SPOTTER INFORMATION STATEMENT...SPOTTERS SHOULD REPORT ACCORDING TO
STANDARD OPERATING PROCEDURES.
&&

$$

SHORT TERM/AVIATION...HARRISON
LONG TERM...GORELOW

FOR MORE FORECAST INFORMATION...SEE US ON OUR WEBPAGE:

HTTP://WEATHER.GOV/LASVEGAS OR FOLLOW US ON FACEBOOK AND TWITTER




000
FXUS65 KVEF 222219
AFDVEF

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
315 PM PDT WED APR 22 2015

.SYNOPSIS...A SERIES OF UPPER LEVEL DISTURBANCES WILL KEEP
RELATIVELY COOL WEATHER WITH ISOLATED TO SCATTERED SHOWERS AND
THUNDERSTORMS IN THE FORECAST THROUGH SATURDAY NIGHT. HIGH PRESSURE
WILL BUILD IN BY EARLY NEXT WEEK LEADING TO DRY CONDITIONS AND A
WARMING TREND.
&&

.SHORT TERM...THROUGH FRIDAY NIGHT.

ONE UPPER LOW WAS SPINNING OVER NORTHWEST SAN BERNARDINO AND
SOUTHWEST INYO COUNTIES THIS AFTERNOON. THE MOST ACTIVE OR STRONGEST
CONVECTION WAS NEAR AND NORTH OF THE LOW CENTER ABOUT AS EXPECTED.
WEAKER CONVECTION WAS NOTED EAST OF THERE WITH JUST ABOUT NOTHING
GOING ON FARTHER EAST IN MOHAVE COUNTY. A SECOND LOW WAS DROPPING
SOUTH OFF THE COAST AND WILL MERGE WITH THE FIRST LOW TONIGHT ACROSS
SOUTHERN CALIFORNIA INTO WESTERN NEVADA. THIS WILL KEEP A CHANCE OF
SHOWERS AND EVENING THUNDERSTORMS TONIGHT OVER SOUTHEAST CALIFORNIA
AND FROM A LAS VEGAS TO RACHEL LINE WESTWARD IN SOUTHERN NEVADA.
MODELS CONTINUE TO INDICATE A FAIRLY SHARP MOISTURE BOUNDARY WITH
PRETTY DRY AND STABLE AIR PERSISTING OVER EASTERN PORTIONS OF THE
FORECAST AREA. THE LOW PRESSURE SYSTEM WILL MOVE SLOWLY EAST TO
SOUTHERN NEVADA AND EXTENDING SOUTH ALONG THE COLORADO RIVER
THURSDAY. THIS WILL LEAD TO A CHANCE OF SHOWERS AND THUNDERSTORMS
AREA WIDE WITH TEMPERATURES SEVERAL DEGREES BELOW NORMAL. STILL NOT
LOOKING FOR A WIDESPREAD SOAKING RAIN EVENT BUT MEASURABLE
PRECIPITATION CANNOT BE RULED OUT IN ANY PARTICULAR LOCATION. THE
BEST CHANCES FOR ANY DECENT PRECIPITATION WILL BE OVER THE
MOUNTAINS. THE UPPER LOW WILL MOVE EAST OF THE AREA THURSDAY NIGHT
BUT ANOTHER SHORTWAVE WILL FOLLOW QUICKLY ON IT`S HEELS LATE
THURSDAY NIGHT AND FRIDAY. THIS WILL KEEP AT LEAST A SLIGHT CHANCE
OF SHOWERS OVER MOST OF THE FORECAST AREA. YET ANOTHER SHORTWAVE
WILL PUSH INTO NORTHWEST NEVADA BY FRIDAY NIGHT KEEPING A CHANCE OF
SHOWERS GOING...MAINLY ACROSS LINCOLN...NYE.ESMERALDA AND NORTHERN
INYO COUNTIES.


.LONG TERM...SATURDAY MORNING THROUGH WEDNESDAY.

MODELS ARE IN GOOD AGREEMENT EARLY IN THE EXTENDED PERIOD AS A
FAIRLY STRONG TROUGH AND ASSOCIATED COLD FRONT MOVE THROUGH THE AREA
SATURDAY. TYPICALLY THIS TIME OF YEAR MANY OF THESE TROUGHS ARE
FAIRLY DRY FOR OUR AREA...HOWEVER THIS SYSTEM IS EXPECTED TO BRING
IN PLENTY OF MOISTURE AND BRING FAIRLY WIDESPREAD SHOWERS AND
THUNDERSTORMS OVER AT LEAST ESMERALDA...CENTRAL NYE AND LINCOLN
COUNTIES SATURDAY AND SATURDAY NIGHT. MOST OF THE RAINFALL IS
EXPECTED TO BE ASSOCIATED AHEAD AND BEHIND A COLD FRONT THAT WILL
MOVE THROUGH THE REGION DURING THE DAY. THE GFS IN PARTICULAR SHOWED
STRONG FRONTOGENENIS ACROSS CENTRAL NYE AND LINCOLN COUNTIES AND
THIS IS WHERE THE HEAVIEST RAINFALL IS EXPECTED ALONG WITH THE BEST
INSTABILITY. HAVE GONE AHEAD AND INCREASED POPS QUITE A BIT IN THESE
AREAS. HAVE ALSO INCREASED POPS SLIGHTLY OVER THE SOUTHERN HALF OF
THE AREA...BUT RIGHT NOW IT LOOKS LIKE MOST OF THE RAINFALL AND
THUNDERSTORM ACTIVITY WILL REMAIN OVER THE NORTHERN HALF OF THE
AREA. GUSTY WINDS ARE EXPECTED TO OCCUR OVER SAN BERNARDINO AND
MOHAVE COUNTIES SATURDAY AND WIND ADVISORIES MAY BE
NEEDED...ESPECIALLY OVER WESTERN SAN BERNARDINO COUNTY WHERE GUSTS
COULD EXCEED 40 MPH. THIS TROUGH IS FORECAST TO QUICKLY EXIT THE
AREA SATURDAY NIGHT WITH ONLY THE EXTREME EASTERN AREAS SEEING A
CHANCE OF PRECIPITATION EARLY SUNDAY MORNING. SUNDAY IS EXPECTED TO
BE DRY...BUT GUSTY NORTH WINDS LOOK TO OCCUR OVER MOST OF THE AREA
AND MAY BE STRONG ENOUGH IN SOME LOCATIONS TO WARRANT WIND
ADVISORIES...ESPECIALLY DOWN THE COLORADO RIVER. THE COOLEST
TEMPERATURES ARE EXPECTED SATURDAY WITH READINGS 8-10 DEGREES BELOW
NORMAL. SUNDAY WILL SEE A SLIGHT INCREASE IN TEMPERATURES WITH
ADDITIONAL WARMING OCCURRING MONDAY THROUGH WEDNESDAY AS HIGH
PRESSURE MOVES INTO THE REGION AND BRINGS DRIER CONDITIONS AND
LIGHTER WINDS. &&

.AVIATION...FOR MCCARRAN...PREDOMINANTLY SOUTH/SOUTHEAST WINDS 8-12
KNOTS ARE EXPECTED THROUGH EARLY EVENING. HOWEVER...ANY SHOWERS IN
THE AREA COULD CAUSE WINDS TO BECOME ERRATIC AT TIMES.
SOUTH/SOUTHWEST WINDS UP TO 10 KNOTS ARE THEN EXPECTED LATE EVENING
AND OVERNIGHT BEFORE BECOMING LIGHT AND VARIABLE BY MID THURSDAY
MORNING. WINDS MUCH OF THURSDAY AFTERNOON SHOULD BE FROM THE
SOUTHEAST UP TO 10 KNOTS. DUE TO THE PROXIMITY OF AN UPPER LEVEL LOW
PRESSURE SYSTEM ISOLATED SHOWERS ARE POSSIBLE THROUGH TONIGHT WITH
CLOUD BASES SCT-BKN100-120 KFT. MORE CLOUD COVER AND A BETTER CHANCE
OF SHOWERS WITH ISOLATED THUNDERSTORMS IS EXPECTED THURSDAY.

.FOR THE REST OF SOUTHERN NEVADA...NORTHWEST ARIZONA...AND SOUTHEAST
CALIFORNIA...MAINLY SOUTH WINDS ARE EXPECTED AT 7-14 KTS WITH GUSTS
20 TO 25 KTS THROUGH THURSDAY. THE EXCEPTION WILL BE ERRATIC
DIRECTIONS AND STRONGER GUSTS NEAR ANY ISOLATED SHRA/TSRA WHICH WILL
BE AROUND. THE SHOWERS AND THUNDERSTORMS WILL BE LIMITED TO ROUGHLY
WEST OF LAS VEGAS TONIGHT THEN AREA WIDE THURSDAY. CLOUD BASES WILL
BE DOWN AS LOW AS 6K-10K FEET NEAR SHRA/TSRA OTHERWISE MAINLY 12K-
18K FEET. &&

.SPOTTER INFORMATION STATEMENT...SPOTTERS SHOULD REPORT ACCORDING TO
STANDARD OPERATING PROCEDURES.
&&

$$

SHORT TERM/AVIATION...HARRISON
LONG TERM...GORELOW

FOR MORE FORECAST INFORMATION...SEE US ON OUR WEBPAGE:

HTTP://WEATHER.GOV/LASVEGAS OR FOLLOW US ON FACEBOOK AND TWITTER





000
FXUS65 KVEF 222219
AFDVEF

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
315 PM PDT WED APR 22 2015

.SYNOPSIS...A SERIES OF UPPER LEVEL DISTURBANCES WILL KEEP
RELATIVELY COOL WEATHER WITH ISOLATED TO SCATTERED SHOWERS AND
THUNDERSTORMS IN THE FORECAST THROUGH SATURDAY NIGHT. HIGH PRESSURE
WILL BUILD IN BY EARLY NEXT WEEK LEADING TO DRY CONDITIONS AND A
WARMING TREND.
&&

.SHORT TERM...THROUGH FRIDAY NIGHT.

ONE UPPER LOW WAS SPINNING OVER NORTHWEST SAN BERNARDINO AND
SOUTHWEST INYO COUNTIES THIS AFTERNOON. THE MOST ACTIVE OR STRONGEST
CONVECTION WAS NEAR AND NORTH OF THE LOW CENTER ABOUT AS EXPECTED.
WEAKER CONVECTION WAS NOTED EAST OF THERE WITH JUST ABOUT NOTHING
GOING ON FARTHER EAST IN MOHAVE COUNTY. A SECOND LOW WAS DROPPING
SOUTH OFF THE COAST AND WILL MERGE WITH THE FIRST LOW TONIGHT ACROSS
SOUTHERN CALIFORNIA INTO WESTERN NEVADA. THIS WILL KEEP A CHANCE OF
SHOWERS AND EVENING THUNDERSTORMS TONIGHT OVER SOUTHEAST CALIFORNIA
AND FROM A LAS VEGAS TO RACHEL LINE WESTWARD IN SOUTHERN NEVADA.
MODELS CONTINUE TO INDICATE A FAIRLY SHARP MOISTURE BOUNDARY WITH
PRETTY DRY AND STABLE AIR PERSISTING OVER EASTERN PORTIONS OF THE
FORECAST AREA. THE LOW PRESSURE SYSTEM WILL MOVE SLOWLY EAST TO
SOUTHERN NEVADA AND EXTENDING SOUTH ALONG THE COLORADO RIVER
THURSDAY. THIS WILL LEAD TO A CHANCE OF SHOWERS AND THUNDERSTORMS
AREA WIDE WITH TEMPERATURES SEVERAL DEGREES BELOW NORMAL. STILL NOT
LOOKING FOR A WIDESPREAD SOAKING RAIN EVENT BUT MEASURABLE
PRECIPITATION CANNOT BE RULED OUT IN ANY PARTICULAR LOCATION. THE
BEST CHANCES FOR ANY DECENT PRECIPITATION WILL BE OVER THE
MOUNTAINS. THE UPPER LOW WILL MOVE EAST OF THE AREA THURSDAY NIGHT
BUT ANOTHER SHORTWAVE WILL FOLLOW QUICKLY ON IT`S HEELS LATE
THURSDAY NIGHT AND FRIDAY. THIS WILL KEEP AT LEAST A SLIGHT CHANCE
OF SHOWERS OVER MOST OF THE FORECAST AREA. YET ANOTHER SHORTWAVE
WILL PUSH INTO NORTHWEST NEVADA BY FRIDAY NIGHT KEEPING A CHANCE OF
SHOWERS GOING...MAINLY ACROSS LINCOLN...NYE.ESMERALDA AND NORTHERN
INYO COUNTIES.


.LONG TERM...SATURDAY MORNING THROUGH WEDNESDAY.

MODELS ARE IN GOOD AGREEMENT EARLY IN THE EXTENDED PERIOD AS A
FAIRLY STRONG TROUGH AND ASSOCIATED COLD FRONT MOVE THROUGH THE AREA
SATURDAY. TYPICALLY THIS TIME OF YEAR MANY OF THESE TROUGHS ARE
FAIRLY DRY FOR OUR AREA...HOWEVER THIS SYSTEM IS EXPECTED TO BRING
IN PLENTY OF MOISTURE AND BRING FAIRLY WIDESPREAD SHOWERS AND
THUNDERSTORMS OVER AT LEAST ESMERALDA...CENTRAL NYE AND LINCOLN
COUNTIES SATURDAY AND SATURDAY NIGHT. MOST OF THE RAINFALL IS
EXPECTED TO BE ASSOCIATED AHEAD AND BEHIND A COLD FRONT THAT WILL
MOVE THROUGH THE REGION DURING THE DAY. THE GFS IN PARTICULAR SHOWED
STRONG FRONTOGENENIS ACROSS CENTRAL NYE AND LINCOLN COUNTIES AND
THIS IS WHERE THE HEAVIEST RAINFALL IS EXPECTED ALONG WITH THE BEST
INSTABILITY. HAVE GONE AHEAD AND INCREASED POPS QUITE A BIT IN THESE
AREAS. HAVE ALSO INCREASED POPS SLIGHTLY OVER THE SOUTHERN HALF OF
THE AREA...BUT RIGHT NOW IT LOOKS LIKE MOST OF THE RAINFALL AND
THUNDERSTORM ACTIVITY WILL REMAIN OVER THE NORTHERN HALF OF THE
AREA. GUSTY WINDS ARE EXPECTED TO OCCUR OVER SAN BERNARDINO AND
MOHAVE COUNTIES SATURDAY AND WIND ADVISORIES MAY BE
NEEDED...ESPECIALLY OVER WESTERN SAN BERNARDINO COUNTY WHERE GUSTS
COULD EXCEED 40 MPH. THIS TROUGH IS FORECAST TO QUICKLY EXIT THE
AREA SATURDAY NIGHT WITH ONLY THE EXTREME EASTERN AREAS SEEING A
CHANCE OF PRECIPITATION EARLY SUNDAY MORNING. SUNDAY IS EXPECTED TO
BE DRY...BUT GUSTY NORTH WINDS LOOK TO OCCUR OVER MOST OF THE AREA
AND MAY BE STRONG ENOUGH IN SOME LOCATIONS TO WARRANT WIND
ADVISORIES...ESPECIALLY DOWN THE COLORADO RIVER. THE COOLEST
TEMPERATURES ARE EXPECTED SATURDAY WITH READINGS 8-10 DEGREES BELOW
NORMAL. SUNDAY WILL SEE A SLIGHT INCREASE IN TEMPERATURES WITH
ADDITIONAL WARMING OCCURRING MONDAY THROUGH WEDNESDAY AS HIGH
PRESSURE MOVES INTO THE REGION AND BRINGS DRIER CONDITIONS AND
LIGHTER WINDS. &&

.AVIATION...FOR MCCARRAN...PREDOMINANTLY SOUTH/SOUTHEAST WINDS 8-12
KNOTS ARE EXPECTED THROUGH EARLY EVENING. HOWEVER...ANY SHOWERS IN
THE AREA COULD CAUSE WINDS TO BECOME ERRATIC AT TIMES.
SOUTH/SOUTHWEST WINDS UP TO 10 KNOTS ARE THEN EXPECTED LATE EVENING
AND OVERNIGHT BEFORE BECOMING LIGHT AND VARIABLE BY MID THURSDAY
MORNING. WINDS MUCH OF THURSDAY AFTERNOON SHOULD BE FROM THE
SOUTHEAST UP TO 10 KNOTS. DUE TO THE PROXIMITY OF AN UPPER LEVEL LOW
PRESSURE SYSTEM ISOLATED SHOWERS ARE POSSIBLE THROUGH TONIGHT WITH
CLOUD BASES SCT-BKN100-120 KFT. MORE CLOUD COVER AND A BETTER CHANCE
OF SHOWERS WITH ISOLATED THUNDERSTORMS IS EXPECTED THURSDAY.

.FOR THE REST OF SOUTHERN NEVADA...NORTHWEST ARIZONA...AND SOUTHEAST
CALIFORNIA...MAINLY SOUTH WINDS ARE EXPECTED AT 7-14 KTS WITH GUSTS
20 TO 25 KTS THROUGH THURSDAY. THE EXCEPTION WILL BE ERRATIC
DIRECTIONS AND STRONGER GUSTS NEAR ANY ISOLATED SHRA/TSRA WHICH WILL
BE AROUND. THE SHOWERS AND THUNDERSTORMS WILL BE LIMITED TO ROUGHLY
WEST OF LAS VEGAS TONIGHT THEN AREA WIDE THURSDAY. CLOUD BASES WILL
BE DOWN AS LOW AS 6K-10K FEET NEAR SHRA/TSRA OTHERWISE MAINLY 12K-
18K FEET. &&

.SPOTTER INFORMATION STATEMENT...SPOTTERS SHOULD REPORT ACCORDING TO
STANDARD OPERATING PROCEDURES.
&&

$$

SHORT TERM/AVIATION...HARRISON
LONG TERM...GORELOW

FOR MORE FORECAST INFORMATION...SEE US ON OUR WEBPAGE:

HTTP://WEATHER.GOV/LASVEGAS OR FOLLOW US ON FACEBOOK AND TWITTER




000
FXUS65 KVEF 222217
AFDVEF

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
315 PM PDT WED APR 22 2015

.SYNOPSIS...A SERIES OF UPPER LEVEL DISTURBANCES WILL KEEP
RELATIVELY COOL WEATHER WITH ISOLATED TO SCATTERED SHOWERS AND
THUNDERSTORMS IN THE FORECAST THROUGH SATURDAY NIGHT. HIGH PRESSURE
WILL BUILD IN BY EARLY NEXT WEEK LEADING TO DRY CONDITIONS AND A
WARMING TREND.
&&

.SHORT TERM...THROUGH FRIDAY NIGHT.

ONE UPPER LOW WAS SPINNING OVER NORTHWEST SAN BERNARDINO AND
SOUTHWEST INYO COUNTIES THIS AFTERNOON. THE MOST ACTIVE OR STRONGEST
CONVECTION WAS NEAR AND NORTH OF THE LOW CENTER ABOUT AS EXPECTED.
WEAKER CONVECTION WAS NOTED EAST OF THERE WITH JUST ABOUT NOTHING
GOING ON FARTHER EAST IN MOHAVE COUNTY. A SECOND LOW WAS DROPPING
SOUTH OFF THE COAST AND WILL MERGE WITH THE FIRST LOW TONIGHT ACROSS
SOUTHERN CALIFORNIA INTO WESTERN NEVADA. THIS WILL KEEP A CHANCE OF
SHOWERS AND EVENING THUNDERSTORMS TONIGHT OVER SOUTHEAST CALIFORNIA
AND FROM A LAS VEGAS TO RACHEL LINE WESTWARD IN SOUTHERN NEVADA.
MODELS CONTINUE TO INDICATE A FAIRLY SHARP MOISTURE BOUNDARY WITH
PRETTY DRY AND STABLE AIR PERSISTING OVER EASTERN PORTIONS OF THE
FORECAST AREA. THE LOW PRESSURE SYSTEM WILL MOVE SLOWLY EAST TO
SOUTHERN NEVADA AND EXTENDING SOUTH ALONG THE COLORADO RIVER
THURSDAY. THIS WILL LEAD TO A CHANCE OF SHOWERS AND THUNDERSTORMS
AREA WIDE WITH TEMPERATURES SEVERAL DEGREES BELOW NORMAL. STILL NOT
LOOKING FOR A WIDESPREAD SOAKING RAIN EVENT BUT MEASURABLE
PRECIPITATION CANNOT BE RULED OUT IN ANY PARTICULAR LOCATION. THE
BEST CHANCES FOR ANY DECENT PRECIPITATION WILL BE OVER THE
MOUNTAINS. THE UPPER LOW WILL MOVE EAST OF THE AREA THURSDAY NIGHT
BUT ANOTHER SHORTWAVE WILL FOLLOW QUICKLY ON IT`S HEELS LATE
THURSDAY NIGHT AND FRIDAY. THIS WILL KEEP AT LEAST A SLIGHT CHANCE
OF SHOWERS OVER MOST OF THE FORECAST AREA. YET ANOTHER SHORTWAVE
WILL PUSH INTO NORTHWEST NEVADA BY FRIDAY NIGHT KEEPING A CHANCE OF
SHOWERS GOING...MAINLY ACROSS LINCOLN...NYE.ESMERALDA AND NORTHERN
INYO COUNTIES.


.LONG TERM...SATURDAY MORNING THROUGH WEDNESDAY.

MODELS ARE IN GOOD AGREEMENT EARLY IN THE EXTENDED PERIOD AS A
FAIRLY STRONG TROUGH AND ASSOCIATED COLD FRONT MOVE THROUGH THE AREA
SATURDAY. TYPICALLY THIS TIME OF YEAR MANY OF THESE TROUGHS ARE
FAIRLY DRY FOR OUR AREA...HOWEVER THIS SYSTEM IS EXPECTED TO BRING
IN PLENTY OF MOISTURE AND BRING FAIRLY WIDESPREAD SHOWERS AND
THUNDERSTORMS OVER AT LEAST ESMERALDA...CENTRAL NYE AND LINCOLN
COUNTIES SATURDAY AND SATURDAY NIGHT. MOST OF THE RAINFALL IS
EXPECTED TO BE ASSOCIATED AHEAD AND BEHIND A COLD FRONT THAT WILL
MOVE THROUGH THE REGION DURING THE DAY. THE GFS IN PARTICULAR SHOWED
STRONG FRONTOGENENIS ACROSS CENTRAL NYE AND LINCOLN COUNTIES AND
THIS IS WHERE THE HEAVIEST RAINFALL IS EXPECTED ALONG WITH THE BEST
INSTABILITY. HAVE GONE AHEAD AND INCREASED POPS QUITE A BIT IN THESE
AREAS. HAVE ALSO INCREASED POPS SLIGHTLY OVER THE SOUTHERN HALF OF
THE AREA...BUT RIGHT NOW IT LOOKS LIKE MOST OF THE RAINFALL AND
THUNDERSTORM ACTIVITY WILL REMAIN OVER THE NORTHERN HALF OF THE
AREA. GUSTY WINDS ARE EXPECTED TO OCCUR OVER SAN BERNARDINO AND
MOHAVE COUNTIES SATURDAY AND WIND ADVISORIES MAY BE
NEEDED...ESPECIALLY OVER WESTERN SAN BERNARDINO COUNTY WHERE GUSTS
COULD EXCEED 40 MPH. THIS TROUGH IS FORECAST TO QUICKLY EXIT THE
AREA SATURDAY NIGHT WITH ONLY THE EXTREME EASTERN AREAS SEEING A
CHANCE OF PRECIPITATION EARLY SUNDAY MORNING. SUNDAY IS EXPECTED TO
BE DRY...BUT GUSTY NORTH WINDS LOOK TO OCCUR OVER MOST OF THE AREA
AND MAY BE STRONG ENOUGH IN SOME LOCATIONS TO WARRANT WIND
ADVISORIES...ESPECIALLY DOWN THE COLORADO RIVER. THE COOLEST
TEMPERATURES ARE EXPECTED SATURDAY WITH READINGS 8-10 DEGREES BELOW
NORMAL. SUNDAY WILL SEE A SLIGHT INCREASE IN TEMPERATURES WITH
ADDITIONAL WARMING OCCURRING MONDAY THROUGH WEDNESDAY AS HIGH
PRESSURE MOVES INTO THE REGION AND BRINGS DRIER CONDITIONS AND
LIGHTER WINDS. && &&

.AVIATION...FOR MCCARRAN...PREDOMINANTLY SOUTH/SOUTHEAST WINDS 8-12
KNOTS ARE EXPECTED THROUGH EARLY EVENING. HOWEVER...ANY SHOWERS IN
THE AREA COULD CAUSE WINDS TO BECOME ERRATIC AT TIMES.
SOUTH/SOUTHWEST WINDS UP TO 10 KNOTS ARE THEN EXPECTED LATE EVENING
AND OVERNIGHT BEFORE BECOMING LIGHT AND VARIABLE BY MID THURSDAY
MORNING. WINDS MUCH OF THURSDAY AFTERNOON SHOULD BE FROM THE
SOUTHEAST UP TO 10 KNOTS. DUE TO THE PROXIMITY OF AN UPPER LEVEL LOW
PRESSURE SYSTEM ISOLATED SHOWERS ARE POSSIBLE THROUGH TONIGHT WITH
CLOUD BASES SCT-BKN100-120 KFT. MORE CLOUD COVER AND A BETTER CHANCE
OF SHOWERS WITH ISOLATED THUNDERSTORMS IS EXPECTED THURSDAY.

.FOR THE REST OF SOUTHERN NEVADA...NORTHWEST ARIZONA...AND SOUTHEAST
CALIFORNIA...MAINLY SOUTH WINDS ARE EXPECTED AT 7-14 KTS WITH GUSTS
20 TO 25 KTS THROUGH THURSDAY. THE EXCEPTION WILL BE ERRATIC
DIRECTIONS AND STRONGER GUSTS NEAR ANY ISOLATED SHRA/TSRA WHICH WILL
BE AROUND. THE SHOWERS AND THUNDERSTORMS WILL BE LIMITED TO ROUGHLY
WEST OF LAS VEGAS TONIGHT THEN AREA WIDE THURSDAY. CLOUD BASES WILL
BE DOWN AS LOW AS 6K-10K FEET NEAR SHRA/TSRA OTHERWISE MAINLY 12K-
18K FEET. &&

.SPOTTER INFORMATION STATEMENT...SPOTTERS SHOULD REPORT ACCORDING TO
STANDARD OPERATING PROCEDURES.
&&

$$

SHORT TERM/AVIATION...HARRISON
LONG TERM...GORELOW

FOR MORE FORECAST INFORMATION...SEE US ON OUR WEBPAGE:

HTTP://WEATHER.GOV/LASVEGAS OR FOLLOW US ON FACEBOOK AND TWITTER




000
FXUS65 KVEF 222217
AFDVEF

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
315 PM PDT WED APR 22 2015

.SYNOPSIS...A SERIES OF UPPER LEVEL DISTURBANCES WILL KEEP
RELATIVELY COOL WEATHER WITH ISOLATED TO SCATTERED SHOWERS AND
THUNDERSTORMS IN THE FORECAST THROUGH SATURDAY NIGHT. HIGH PRESSURE
WILL BUILD IN BY EARLY NEXT WEEK LEADING TO DRY CONDITIONS AND A
WARMING TREND.
&&

.SHORT TERM...THROUGH FRIDAY NIGHT.

ONE UPPER LOW WAS SPINNING OVER NORTHWEST SAN BERNARDINO AND
SOUTHWEST INYO COUNTIES THIS AFTERNOON. THE MOST ACTIVE OR STRONGEST
CONVECTION WAS NEAR AND NORTH OF THE LOW CENTER ABOUT AS EXPECTED.
WEAKER CONVECTION WAS NOTED EAST OF THERE WITH JUST ABOUT NOTHING
GOING ON FARTHER EAST IN MOHAVE COUNTY. A SECOND LOW WAS DROPPING
SOUTH OFF THE COAST AND WILL MERGE WITH THE FIRST LOW TONIGHT ACROSS
SOUTHERN CALIFORNIA INTO WESTERN NEVADA. THIS WILL KEEP A CHANCE OF
SHOWERS AND EVENING THUNDERSTORMS TONIGHT OVER SOUTHEAST CALIFORNIA
AND FROM A LAS VEGAS TO RACHEL LINE WESTWARD IN SOUTHERN NEVADA.
MODELS CONTINUE TO INDICATE A FAIRLY SHARP MOISTURE BOUNDARY WITH
PRETTY DRY AND STABLE AIR PERSISTING OVER EASTERN PORTIONS OF THE
FORECAST AREA. THE LOW PRESSURE SYSTEM WILL MOVE SLOWLY EAST TO
SOUTHERN NEVADA AND EXTENDING SOUTH ALONG THE COLORADO RIVER
THURSDAY. THIS WILL LEAD TO A CHANCE OF SHOWERS AND THUNDERSTORMS
AREA WIDE WITH TEMPERATURES SEVERAL DEGREES BELOW NORMAL. STILL NOT
LOOKING FOR A WIDESPREAD SOAKING RAIN EVENT BUT MEASURABLE
PRECIPITATION CANNOT BE RULED OUT IN ANY PARTICULAR LOCATION. THE
BEST CHANCES FOR ANY DECENT PRECIPITATION WILL BE OVER THE
MOUNTAINS. THE UPPER LOW WILL MOVE EAST OF THE AREA THURSDAY NIGHT
BUT ANOTHER SHORTWAVE WILL FOLLOW QUICKLY ON IT`S HEELS LATE
THURSDAY NIGHT AND FRIDAY. THIS WILL KEEP AT LEAST A SLIGHT CHANCE
OF SHOWERS OVER MOST OF THE FORECAST AREA. YET ANOTHER SHORTWAVE
WILL PUSH INTO NORTHWEST NEVADA BY FRIDAY NIGHT KEEPING A CHANCE OF
SHOWERS GOING...MAINLY ACROSS LINCOLN...NYE.ESMERALDA AND NORTHERN
INYO COUNTIES.


.LONG TERM...SATURDAY MORNING THROUGH WEDNESDAY.

MODELS ARE IN GOOD AGREEMENT EARLY IN THE EXTENDED PERIOD AS A
FAIRLY STRONG TROUGH AND ASSOCIATED COLD FRONT MOVE THROUGH THE AREA
SATURDAY. TYPICALLY THIS TIME OF YEAR MANY OF THESE TROUGHS ARE
FAIRLY DRY FOR OUR AREA...HOWEVER THIS SYSTEM IS EXPECTED TO BRING
IN PLENTY OF MOISTURE AND BRING FAIRLY WIDESPREAD SHOWERS AND
THUNDERSTORMS OVER AT LEAST ESMERALDA...CENTRAL NYE AND LINCOLN
COUNTIES SATURDAY AND SATURDAY NIGHT. MOST OF THE RAINFALL IS
EXPECTED TO BE ASSOCIATED AHEAD AND BEHIND A COLD FRONT THAT WILL
MOVE THROUGH THE REGION DURING THE DAY. THE GFS IN PARTICULAR SHOWED
STRONG FRONTOGENENIS ACROSS CENTRAL NYE AND LINCOLN COUNTIES AND
THIS IS WHERE THE HEAVIEST RAINFALL IS EXPECTED ALONG WITH THE BEST
INSTABILITY. HAVE GONE AHEAD AND INCREASED POPS QUITE A BIT IN THESE
AREAS. HAVE ALSO INCREASED POPS SLIGHTLY OVER THE SOUTHERN HALF OF
THE AREA...BUT RIGHT NOW IT LOOKS LIKE MOST OF THE RAINFALL AND
THUNDERSTORM ACTIVITY WILL REMAIN OVER THE NORTHERN HALF OF THE
AREA. GUSTY WINDS ARE EXPECTED TO OCCUR OVER SAN BERNARDINO AND
MOHAVE COUNTIES SATURDAY AND WIND ADVISORIES MAY BE
NEEDED...ESPECIALLY OVER WESTERN SAN BERNARDINO COUNTY WHERE GUSTS
COULD EXCEED 40 MPH. THIS TROUGH IS FORECAST TO QUICKLY EXIT THE
AREA SATURDAY NIGHT WITH ONLY THE EXTREME EASTERN AREAS SEEING A
CHANCE OF PRECIPITATION EARLY SUNDAY MORNING. SUNDAY IS EXPECTED TO
BE DRY...BUT GUSTY NORTH WINDS LOOK TO OCCUR OVER MOST OF THE AREA
AND MAY BE STRONG ENOUGH IN SOME LOCATIONS TO WARRANT WIND
ADVISORIES...ESPECIALLY DOWN THE COLORADO RIVER. THE COOLEST
TEMPERATURES ARE EXPECTED SATURDAY WITH READINGS 8-10 DEGREES BELOW
NORMAL. SUNDAY WILL SEE A SLIGHT INCREASE IN TEMPERATURES WITH
ADDITIONAL WARMING OCCURRING MONDAY THROUGH WEDNESDAY AS HIGH
PRESSURE MOVES INTO THE REGION AND BRINGS DRIER CONDITIONS AND
LIGHTER WINDS. && &&

.AVIATION...FOR MCCARRAN...PREDOMINANTLY SOUTH/SOUTHEAST WINDS 8-12
KNOTS ARE EXPECTED THROUGH EARLY EVENING. HOWEVER...ANY SHOWERS IN
THE AREA COULD CAUSE WINDS TO BECOME ERRATIC AT TIMES.
SOUTH/SOUTHWEST WINDS UP TO 10 KNOTS ARE THEN EXPECTED LATE EVENING
AND OVERNIGHT BEFORE BECOMING LIGHT AND VARIABLE BY MID THURSDAY
MORNING. WINDS MUCH OF THURSDAY AFTERNOON SHOULD BE FROM THE
SOUTHEAST UP TO 10 KNOTS. DUE TO THE PROXIMITY OF AN UPPER LEVEL LOW
PRESSURE SYSTEM ISOLATED SHOWERS ARE POSSIBLE THROUGH TONIGHT WITH
CLOUD BASES SCT-BKN100-120 KFT. MORE CLOUD COVER AND A BETTER CHANCE
OF SHOWERS WITH ISOLATED THUNDERSTORMS IS EXPECTED THURSDAY.

.FOR THE REST OF SOUTHERN NEVADA...NORTHWEST ARIZONA...AND SOUTHEAST
CALIFORNIA...MAINLY SOUTH WINDS ARE EXPECTED AT 7-14 KTS WITH GUSTS
20 TO 25 KTS THROUGH THURSDAY. THE EXCEPTION WILL BE ERRATIC
DIRECTIONS AND STRONGER GUSTS NEAR ANY ISOLATED SHRA/TSRA WHICH WILL
BE AROUND. THE SHOWERS AND THUNDERSTORMS WILL BE LIMITED TO ROUGHLY
WEST OF LAS VEGAS TONIGHT THEN AREA WIDE THURSDAY. CLOUD BASES WILL
BE DOWN AS LOW AS 6K-10K FEET NEAR SHRA/TSRA OTHERWISE MAINLY 12K-
18K FEET. &&

.SPOTTER INFORMATION STATEMENT...SPOTTERS SHOULD REPORT ACCORDING TO
STANDARD OPERATING PROCEDURES.
&&

$$

SHORT TERM/AVIATION...HARRISON
LONG TERM...GORELOW

FOR MORE FORECAST INFORMATION...SEE US ON OUR WEBPAGE:

HTTP://WEATHER.GOV/LASVEGAS OR FOLLOW US ON FACEBOOK AND TWITTER





000
FXUS65 KVEF 222217
AFDVEF

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
315 PM PDT WED APR 22 2015

.SYNOPSIS...A SERIES OF UPPER LEVEL DISTURBANCES WILL KEEP
RELATIVELY COOL WEATHER WITH ISOLATED TO SCATTERED SHOWERS AND
THUNDERSTORMS IN THE FORECAST THROUGH SATURDAY NIGHT. HIGH PRESSURE
WILL BUILD IN BY EARLY NEXT WEEK LEADING TO DRY CONDITIONS AND A
WARMING TREND.
&&

.SHORT TERM...THROUGH FRIDAY NIGHT.

ONE UPPER LOW WAS SPINNING OVER NORTHWEST SAN BERNARDINO AND
SOUTHWEST INYO COUNTIES THIS AFTERNOON. THE MOST ACTIVE OR STRONGEST
CONVECTION WAS NEAR AND NORTH OF THE LOW CENTER ABOUT AS EXPECTED.
WEAKER CONVECTION WAS NOTED EAST OF THERE WITH JUST ABOUT NOTHING
GOING ON FARTHER EAST IN MOHAVE COUNTY. A SECOND LOW WAS DROPPING
SOUTH OFF THE COAST AND WILL MERGE WITH THE FIRST LOW TONIGHT ACROSS
SOUTHERN CALIFORNIA INTO WESTERN NEVADA. THIS WILL KEEP A CHANCE OF
SHOWERS AND EVENING THUNDERSTORMS TONIGHT OVER SOUTHEAST CALIFORNIA
AND FROM A LAS VEGAS TO RACHEL LINE WESTWARD IN SOUTHERN NEVADA.
MODELS CONTINUE TO INDICATE A FAIRLY SHARP MOISTURE BOUNDARY WITH
PRETTY DRY AND STABLE AIR PERSISTING OVER EASTERN PORTIONS OF THE
FORECAST AREA. THE LOW PRESSURE SYSTEM WILL MOVE SLOWLY EAST TO
SOUTHERN NEVADA AND EXTENDING SOUTH ALONG THE COLORADO RIVER
THURSDAY. THIS WILL LEAD TO A CHANCE OF SHOWERS AND THUNDERSTORMS
AREA WIDE WITH TEMPERATURES SEVERAL DEGREES BELOW NORMAL. STILL NOT
LOOKING FOR A WIDESPREAD SOAKING RAIN EVENT BUT MEASURABLE
PRECIPITATION CANNOT BE RULED OUT IN ANY PARTICULAR LOCATION. THE
BEST CHANCES FOR ANY DECENT PRECIPITATION WILL BE OVER THE
MOUNTAINS. THE UPPER LOW WILL MOVE EAST OF THE AREA THURSDAY NIGHT
BUT ANOTHER SHORTWAVE WILL FOLLOW QUICKLY ON IT`S HEELS LATE
THURSDAY NIGHT AND FRIDAY. THIS WILL KEEP AT LEAST A SLIGHT CHANCE
OF SHOWERS OVER MOST OF THE FORECAST AREA. YET ANOTHER SHORTWAVE
WILL PUSH INTO NORTHWEST NEVADA BY FRIDAY NIGHT KEEPING A CHANCE OF
SHOWERS GOING...MAINLY ACROSS LINCOLN...NYE.ESMERALDA AND NORTHERN
INYO COUNTIES.


.LONG TERM...SATURDAY MORNING THROUGH WEDNESDAY.

MODELS ARE IN GOOD AGREEMENT EARLY IN THE EXTENDED PERIOD AS A
FAIRLY STRONG TROUGH AND ASSOCIATED COLD FRONT MOVE THROUGH THE AREA
SATURDAY. TYPICALLY THIS TIME OF YEAR MANY OF THESE TROUGHS ARE
FAIRLY DRY FOR OUR AREA...HOWEVER THIS SYSTEM IS EXPECTED TO BRING
IN PLENTY OF MOISTURE AND BRING FAIRLY WIDESPREAD SHOWERS AND
THUNDERSTORMS OVER AT LEAST ESMERALDA...CENTRAL NYE AND LINCOLN
COUNTIES SATURDAY AND SATURDAY NIGHT. MOST OF THE RAINFALL IS
EXPECTED TO BE ASSOCIATED AHEAD AND BEHIND A COLD FRONT THAT WILL
MOVE THROUGH THE REGION DURING THE DAY. THE GFS IN PARTICULAR SHOWED
STRONG FRONTOGENENIS ACROSS CENTRAL NYE AND LINCOLN COUNTIES AND
THIS IS WHERE THE HEAVIEST RAINFALL IS EXPECTED ALONG WITH THE BEST
INSTABILITY. HAVE GONE AHEAD AND INCREASED POPS QUITE A BIT IN THESE
AREAS. HAVE ALSO INCREASED POPS SLIGHTLY OVER THE SOUTHERN HALF OF
THE AREA...BUT RIGHT NOW IT LOOKS LIKE MOST OF THE RAINFALL AND
THUNDERSTORM ACTIVITY WILL REMAIN OVER THE NORTHERN HALF OF THE
AREA. GUSTY WINDS ARE EXPECTED TO OCCUR OVER SAN BERNARDINO AND
MOHAVE COUNTIES SATURDAY AND WIND ADVISORIES MAY BE
NEEDED...ESPECIALLY OVER WESTERN SAN BERNARDINO COUNTY WHERE GUSTS
COULD EXCEED 40 MPH. THIS TROUGH IS FORECAST TO QUICKLY EXIT THE
AREA SATURDAY NIGHT WITH ONLY THE EXTREME EASTERN AREAS SEEING A
CHANCE OF PRECIPITATION EARLY SUNDAY MORNING. SUNDAY IS EXPECTED TO
BE DRY...BUT GUSTY NORTH WINDS LOOK TO OCCUR OVER MOST OF THE AREA
AND MAY BE STRONG ENOUGH IN SOME LOCATIONS TO WARRANT WIND
ADVISORIES...ESPECIALLY DOWN THE COLORADO RIVER. THE COOLEST
TEMPERATURES ARE EXPECTED SATURDAY WITH READINGS 8-10 DEGREES BELOW
NORMAL. SUNDAY WILL SEE A SLIGHT INCREASE IN TEMPERATURES WITH
ADDITIONAL WARMING OCCURRING MONDAY THROUGH WEDNESDAY AS HIGH
PRESSURE MOVES INTO THE REGION AND BRINGS DRIER CONDITIONS AND
LIGHTER WINDS. && &&

.AVIATION...FOR MCCARRAN...PREDOMINANTLY SOUTH/SOUTHEAST WINDS 8-12
KNOTS ARE EXPECTED THROUGH EARLY EVENING. HOWEVER...ANY SHOWERS IN
THE AREA COULD CAUSE WINDS TO BECOME ERRATIC AT TIMES.
SOUTH/SOUTHWEST WINDS UP TO 10 KNOTS ARE THEN EXPECTED LATE EVENING
AND OVERNIGHT BEFORE BECOMING LIGHT AND VARIABLE BY MID THURSDAY
MORNING. WINDS MUCH OF THURSDAY AFTERNOON SHOULD BE FROM THE
SOUTHEAST UP TO 10 KNOTS. DUE TO THE PROXIMITY OF AN UPPER LEVEL LOW
PRESSURE SYSTEM ISOLATED SHOWERS ARE POSSIBLE THROUGH TONIGHT WITH
CLOUD BASES SCT-BKN100-120 KFT. MORE CLOUD COVER AND A BETTER CHANCE
OF SHOWERS WITH ISOLATED THUNDERSTORMS IS EXPECTED THURSDAY.

.FOR THE REST OF SOUTHERN NEVADA...NORTHWEST ARIZONA...AND SOUTHEAST
CALIFORNIA...MAINLY SOUTH WINDS ARE EXPECTED AT 7-14 KTS WITH GUSTS
20 TO 25 KTS THROUGH THURSDAY. THE EXCEPTION WILL BE ERRATIC
DIRECTIONS AND STRONGER GUSTS NEAR ANY ISOLATED SHRA/TSRA WHICH WILL
BE AROUND. THE SHOWERS AND THUNDERSTORMS WILL BE LIMITED TO ROUGHLY
WEST OF LAS VEGAS TONIGHT THEN AREA WIDE THURSDAY. CLOUD BASES WILL
BE DOWN AS LOW AS 6K-10K FEET NEAR SHRA/TSRA OTHERWISE MAINLY 12K-
18K FEET. &&

.SPOTTER INFORMATION STATEMENT...SPOTTERS SHOULD REPORT ACCORDING TO
STANDARD OPERATING PROCEDURES.
&&

$$

SHORT TERM/AVIATION...HARRISON
LONG TERM...GORELOW

FOR MORE FORECAST INFORMATION...SEE US ON OUR WEBPAGE:

HTTP://WEATHER.GOV/LASVEGAS OR FOLLOW US ON FACEBOOK AND TWITTER




000
FXUS65 KVEF 222217
AFDVEF

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
315 PM PDT WED APR 22 2015

.SYNOPSIS...A SERIES OF UPPER LEVEL DISTURBANCES WILL KEEP
RELATIVELY COOL WEATHER WITH ISOLATED TO SCATTERED SHOWERS AND
THUNDERSTORMS IN THE FORECAST THROUGH SATURDAY NIGHT. HIGH PRESSURE
WILL BUILD IN BY EARLY NEXT WEEK LEADING TO DRY CONDITIONS AND A
WARMING TREND.
&&

.SHORT TERM...THROUGH FRIDAY NIGHT.

ONE UPPER LOW WAS SPINNING OVER NORTHWEST SAN BERNARDINO AND
SOUTHWEST INYO COUNTIES THIS AFTERNOON. THE MOST ACTIVE OR STRONGEST
CONVECTION WAS NEAR AND NORTH OF THE LOW CENTER ABOUT AS EXPECTED.
WEAKER CONVECTION WAS NOTED EAST OF THERE WITH JUST ABOUT NOTHING
GOING ON FARTHER EAST IN MOHAVE COUNTY. A SECOND LOW WAS DROPPING
SOUTH OFF THE COAST AND WILL MERGE WITH THE FIRST LOW TONIGHT ACROSS
SOUTHERN CALIFORNIA INTO WESTERN NEVADA. THIS WILL KEEP A CHANCE OF
SHOWERS AND EVENING THUNDERSTORMS TONIGHT OVER SOUTHEAST CALIFORNIA
AND FROM A LAS VEGAS TO RACHEL LINE WESTWARD IN SOUTHERN NEVADA.
MODELS CONTINUE TO INDICATE A FAIRLY SHARP MOISTURE BOUNDARY WITH
PRETTY DRY AND STABLE AIR PERSISTING OVER EASTERN PORTIONS OF THE
FORECAST AREA. THE LOW PRESSURE SYSTEM WILL MOVE SLOWLY EAST TO
SOUTHERN NEVADA AND EXTENDING SOUTH ALONG THE COLORADO RIVER
THURSDAY. THIS WILL LEAD TO A CHANCE OF SHOWERS AND THUNDERSTORMS
AREA WIDE WITH TEMPERATURES SEVERAL DEGREES BELOW NORMAL. STILL NOT
LOOKING FOR A WIDESPREAD SOAKING RAIN EVENT BUT MEASURABLE
PRECIPITATION CANNOT BE RULED OUT IN ANY PARTICULAR LOCATION. THE
BEST CHANCES FOR ANY DECENT PRECIPITATION WILL BE OVER THE
MOUNTAINS. THE UPPER LOW WILL MOVE EAST OF THE AREA THURSDAY NIGHT
BUT ANOTHER SHORTWAVE WILL FOLLOW QUICKLY ON IT`S HEELS LATE
THURSDAY NIGHT AND FRIDAY. THIS WILL KEEP AT LEAST A SLIGHT CHANCE
OF SHOWERS OVER MOST OF THE FORECAST AREA. YET ANOTHER SHORTWAVE
WILL PUSH INTO NORTHWEST NEVADA BY FRIDAY NIGHT KEEPING A CHANCE OF
SHOWERS GOING...MAINLY ACROSS LINCOLN...NYE.ESMERALDA AND NORTHERN
INYO COUNTIES.


.LONG TERM...SATURDAY MORNING THROUGH WEDNESDAY.

MODELS ARE IN GOOD AGREEMENT EARLY IN THE EXTENDED PERIOD AS A
FAIRLY STRONG TROUGH AND ASSOCIATED COLD FRONT MOVE THROUGH THE AREA
SATURDAY. TYPICALLY THIS TIME OF YEAR MANY OF THESE TROUGHS ARE
FAIRLY DRY FOR OUR AREA...HOWEVER THIS SYSTEM IS EXPECTED TO BRING
IN PLENTY OF MOISTURE AND BRING FAIRLY WIDESPREAD SHOWERS AND
THUNDERSTORMS OVER AT LEAST ESMERALDA...CENTRAL NYE AND LINCOLN
COUNTIES SATURDAY AND SATURDAY NIGHT. MOST OF THE RAINFALL IS
EXPECTED TO BE ASSOCIATED AHEAD AND BEHIND A COLD FRONT THAT WILL
MOVE THROUGH THE REGION DURING THE DAY. THE GFS IN PARTICULAR SHOWED
STRONG FRONTOGENENIS ACROSS CENTRAL NYE AND LINCOLN COUNTIES AND
THIS IS WHERE THE HEAVIEST RAINFALL IS EXPECTED ALONG WITH THE BEST
INSTABILITY. HAVE GONE AHEAD AND INCREASED POPS QUITE A BIT IN THESE
AREAS. HAVE ALSO INCREASED POPS SLIGHTLY OVER THE SOUTHERN HALF OF
THE AREA...BUT RIGHT NOW IT LOOKS LIKE MOST OF THE RAINFALL AND
THUNDERSTORM ACTIVITY WILL REMAIN OVER THE NORTHERN HALF OF THE
AREA. GUSTY WINDS ARE EXPECTED TO OCCUR OVER SAN BERNARDINO AND
MOHAVE COUNTIES SATURDAY AND WIND ADVISORIES MAY BE
NEEDED...ESPECIALLY OVER WESTERN SAN BERNARDINO COUNTY WHERE GUSTS
COULD EXCEED 40 MPH. THIS TROUGH IS FORECAST TO QUICKLY EXIT THE
AREA SATURDAY NIGHT WITH ONLY THE EXTREME EASTERN AREAS SEEING A
CHANCE OF PRECIPITATION EARLY SUNDAY MORNING. SUNDAY IS EXPECTED TO
BE DRY...BUT GUSTY NORTH WINDS LOOK TO OCCUR OVER MOST OF THE AREA
AND MAY BE STRONG ENOUGH IN SOME LOCATIONS TO WARRANT WIND
ADVISORIES...ESPECIALLY DOWN THE COLORADO RIVER. THE COOLEST
TEMPERATURES ARE EXPECTED SATURDAY WITH READINGS 8-10 DEGREES BELOW
NORMAL. SUNDAY WILL SEE A SLIGHT INCREASE IN TEMPERATURES WITH
ADDITIONAL WARMING OCCURRING MONDAY THROUGH WEDNESDAY AS HIGH
PRESSURE MOVES INTO THE REGION AND BRINGS DRIER CONDITIONS AND
LIGHTER WINDS. && &&

.AVIATION...FOR MCCARRAN...PREDOMINANTLY SOUTH/SOUTHEAST WINDS 8-12
KNOTS ARE EXPECTED THROUGH EARLY EVENING. HOWEVER...ANY SHOWERS IN
THE AREA COULD CAUSE WINDS TO BECOME ERRATIC AT TIMES.
SOUTH/SOUTHWEST WINDS UP TO 10 KNOTS ARE THEN EXPECTED LATE EVENING
AND OVERNIGHT BEFORE BECOMING LIGHT AND VARIABLE BY MID THURSDAY
MORNING. WINDS MUCH OF THURSDAY AFTERNOON SHOULD BE FROM THE
SOUTHEAST UP TO 10 KNOTS. DUE TO THE PROXIMITY OF AN UPPER LEVEL LOW
PRESSURE SYSTEM ISOLATED SHOWERS ARE POSSIBLE THROUGH TONIGHT WITH
CLOUD BASES SCT-BKN100-120 KFT. MORE CLOUD COVER AND A BETTER CHANCE
OF SHOWERS WITH ISOLATED THUNDERSTORMS IS EXPECTED THURSDAY.

.FOR THE REST OF SOUTHERN NEVADA...NORTHWEST ARIZONA...AND SOUTHEAST
CALIFORNIA...MAINLY SOUTH WINDS ARE EXPECTED AT 7-14 KTS WITH GUSTS
20 TO 25 KTS THROUGH THURSDAY. THE EXCEPTION WILL BE ERRATIC
DIRECTIONS AND STRONGER GUSTS NEAR ANY ISOLATED SHRA/TSRA WHICH WILL
BE AROUND. THE SHOWERS AND THUNDERSTORMS WILL BE LIMITED TO ROUGHLY
WEST OF LAS VEGAS TONIGHT THEN AREA WIDE THURSDAY. CLOUD BASES WILL
BE DOWN AS LOW AS 6K-10K FEET NEAR SHRA/TSRA OTHERWISE MAINLY 12K-
18K FEET. &&

.SPOTTER INFORMATION STATEMENT...SPOTTERS SHOULD REPORT ACCORDING TO
STANDARD OPERATING PROCEDURES.
&&

$$

SHORT TERM/AVIATION...HARRISON
LONG TERM...GORELOW

FOR MORE FORECAST INFORMATION...SEE US ON OUR WEBPAGE:

HTTP://WEATHER.GOV/LASVEGAS OR FOLLOW US ON FACEBOOK AND TWITTER





000
FXUS65 KVEF 221613
AFDVEF

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
912 AM PDT WED APR 22 2015

.SYNOPSIS...SEVERAL SYSTEMS WILL PASS ACROSS OR NEAR THE AREA
THROUGH SATURDAY EVENING BRINGING A CHANCE FOR SHOWERS AND
THUNDERSTORMS ESPECIALLY IN THE HIGHER ELEVATIONS AND DURING THE
AFTERNOON AND EVENING HOURS. DRIER AIR WILL MOVE IN SATURDAY NIGHT
INTO SUNDAY. HIGH TEMPERATURES ARE EXPECTED TO REMAIN BELOW NORMAL
THROUGH SUNDAY THEN MODERATE STARTING ON MONDAY AS AN AREA OF HIGH
PRESSURE ALOFT BUILDS INTO THE SOUTHWEST.
&&

.UPDATE...MODELS ARE IN GOOD AGREEMENT THAT DRY AND STABLE AIR WILL
PERSIST TODAY AND TONIGHT ACROSS SOUTHERN AND CENTRAL MOHAVE COUNTY
AND ACROSS EASTERN PORTIONS OF SAN BERNARDINO AND CLARK COUNTIES. I
UPDATED TO REMOVE MENTION OF SHOWERS/THUNDERSTORMS AND TO DECREASE
CLOUD COVER TODAY AND TONIGHT IN THOSE AREAS. OTHERWISE THE FORECAST
LOOKS GOOD. -HARRISON-

&&

.PREV DISCUSSION...
300 AM PDT WED APR 22 2015

.SHORT TERM...TODAY THROUGH FRIDAY NIGHT.

WATER VAPOR AND SATELLITE IMAGERY SHOWED THE CENTER OF THE MID/UPPER
LEVEL LOW WAS SWIRLING ACROSS SOUTHEASTERN TULARE AND EASTERN KERN
COUNTIES. A DRY SLOT HAS PUNCHED IN FROM THE SOUTH UP THE COLORADO
RIVER VALLEY AND ERODED AWAY MUCH OF THE CLOUDS ACROSS THE MOJAVE
DESERT WITH THE EXCEPTION OF CLOSER TO THE LOW CENTER, HOWEVER,
THESE SHOULD FILL BACK IN BY LATER THIS MORNING AS CLOUDS ON THE
SOUTHERN EDGE OF THE LOW CENTER MAKE A MOVE EAST AND ADDITIONAL
CUMULUS CLOUDS DEVELOP WITH THE HEATING OF THE DAY IN THE AREAS VOID
OF THEM NOW. WITH THE COLD POOL ALOFT ASSOCIATED WITH THIS LOW
OVERHEAD PROVIDING INSTABILITY AND LINGERING MOISTURE IN PLACE,
SHOWERS AND THUNDERSTORMS SHOULD ONCE AGAIN DEVELOP TODAY AND BECOME
MORE COMMONPLACE BY THE AFTERNOON AND EVENING HOURS ESPECIALLY OVER
THE HIGHER ELEVATIONS. LOOKING AT THE FORECAST SOUNDINGS, WE STILL
HAVE VERY DRY LOW-LEVELS BELOW 700 MB WITH A NICE INVERTED-V LOOK TO
THE PROFILE SO GUSTY AND ERRATIC WINDS WILL BE AN ISSUE IN AND NEAR
ANY SHOWERS AND THUNDERSTORMS. IN ADDITION, FORECAST SOUNDINGS FROM
THE GFS, WRF AND ECMWF DO SHOW SOME SHEAR IN THE WINDS AT LAS VEGAS
ESPECIALLY IN THE 700-550 MB LAYER WHERE BACKING IS NOTED. THE BEST
INSTABILITY IS SHOWN TO EXTEND ACROSS NORTHERN SAN BERNARDINO AND
SOUTHERN INYO COUNTIES INTO SOUTHERN NYE AND WESTERN AND SOUTHERN
CLARK COUNTIES ON THE GFS. SO WE COULD SEE SOME HAIL AS WELL IF WE
GET ANY STRONGER CELLS. AWAY FROM ANY SHOWERS AND THUNDERSTORMS
EXPECT A PARTLY TO MOSTLY CLOUDY SKY WITH TEMPS ABOUT 4-7 DEGREES
BELOW NORMAL THIS AFTERNOON FOR HIGHS.

WE SHOULD SEE ACTIVITY DECREASE IN COVERAGE THIS EVENING WITH THE
LOSS OF HEATING. THE GREATEST CHANCE SHOWERS AND THUNDERSTORMS WILL
REMAIN OVER INYO, CENTRAL/SOUTHERN NYE AND NORTHERN SAN BERNARDINO
COUNTIES CLOSEST TO THE CENTER OF WHAT WILL BE A WEAKENED LOW AS IT
TRANSITIONS TO MORE OF A BROAD PIECE OF ENERGY. ELSEWHERE CLOUDS
WILL ERODE SOMEWHAT BUT REMAIN AROUND IN MANY AREAS OVERNIGHT AND
THERE MAY BE A SPRINKLE OR TWO.

ANOTHER MID/UPPER LEVEL LOW DIVE SOUTH OFF THE COAST OF CALIFORNIA
TODAY AND MERGE WITH THE REMNANT ENERGY LEFT OVER OUR AREA TONIGHT.
THIS NEW LOW WILL REMAIN OVER SOCAL TOMORROW AND THEN HEAD EAST
TOMORROW NIGHT. ONCE AGAIN THIS WILL KEEP ENOUGH INSTABILITY ACROSS
THE AREA TO TRIGGER SHOWERS AND SOME THUNDERSTORMS ESPECIALLY IN THE
AFTERNOON AND EVENING HOURS. HOWEVER, WITH ADDITIONAL MOISTURE BEING
PUSHED INTO THE AREA THE CHANCES OF SHOWERS AND THUNDERSTORMS SHOULD
INCREASE. PWATS ARE FORECAST TO RISE TO 0.59 TO 0.77 INCH BY THE
EVENING IN LAS VEGAS PER THE GFS, ECMWF AND WRF SOUNDINGS. SO
ACTIVITY SHOULD BE ABLE TO PUT DOWN A LITTLE MORE IN THE WAY OF
PRECIPITATION ESPECIALLY IF WE GET ANY SLOW MOVING OR STRONGER
THUNDERSTORMS. HIGH TEMPS SHOULD DROP SEVERAL DEGREES FROM WEDNESDAY
AND BE ABOUT 7-10 DEGREES BELOW NORMAL GIVEN THE EXTENSIVE CLOUD
COVER OVER THE AREA.

SHOWER AND THUNDERSTORM ACTIVITY SHOULD DECREASE IN COVERAGE AGAIN
THURSDAY NIGHT BEFORE REDEVELOPING ON FRIDAY AS THE FLOW ALOFT TURNS
NORTHWEST AND ANOTHER WEAK MID/UPPER LEVEL SHORTWAVE AND ASSOCIATED
ENERGY MAX CROSS THE AREA. GIVEN THE TRAJECTORY OF THIS FEATURE,
THIS SHOULD FAVOR THE SOUTHERN GREAT BASIN FOR THE HIGHEST POPS WITH
LITTLE CHANCE FOR SHOWERS AND THUNDERSTORMS SOUTH OF I-40 ESPECIALLY
IN SAN BERNARDINO COUNTY. ONCE AGAIN TEMPS WILL BE BELOW NORMAL FOR
HIGHS BY 6-10 DEGREES.

.LONG TERM...SATURDAY MORNING THROUGH WEDNESDAY.

THE LONG TERM PERIOD BEGINS WITH THE LAST IN THE SERIES OF RECENT
SHORTWAVES BEGINNING TO DIG INTO THE AREA. OPERATIONAL MODEL
GUIDANCE IS IN MUCH BETTER AGREEMENT TONIGHT IN THE STRENGTH/TIMING
OF THIS SYSTEM...ALLOWING FOR MUCH HIGHER CONFIDENCE IN GRID
CHANGES. MODEL SOLUTIONS HAVE SETTLED ON A DEEPENING OPENING WAVE TO
TRAVERSE ACROSS THE AREA ON SATURDAY BEFORE CLOSING OFF EAST OF THE
AREA IN THE FOUR CORNERS REGION ON SUNDAY. THIS WILL SPELL ANOTHER
DAY OF SHOWER AND THUNDERSTORM CHANCES ON SATURDAY...PARTICULARLY
ACROSS NORTHERN INYO COUNTY AND THE GREAT BASIN ZONES WHERE A SWATH
OF MODEST INSTABILITY HAS BEEN NOTED IN BOTH THE OPERATIONAL GFS AND
ECMWF SATURDAY AFTERNOON. ADDED A MENTION OF THUNDER INTO THE GRIDS
IN THESE AREAS AS A RESULT. INCREASED POPS TO ALLOW FOR A MENTION OF
SHOWERS IN THE 00Z SUNDAY GRIDS IN LINCOLN...EASTERN CLARK AND
MOHAVE COUNTIES...AS THE OPEN WAVE DIGS SOUTHEASTWARD SATURDAY
EVENING ACROSS THESE AREAS BRINGING WITH IT AN ADDITIONAL PUSH OF
MOISTURE AND PLENTY OF FORCING TO GENERATE SHOWERS ACROSS THESE
AREAS. ALSO DECIDED TO BUMP POPS UP A BIT ACROSS EASTERN MOHAVE
COUNTY IN THE 12Z SUNDAY GRIDS IN RESPONSE TO BOTH THE GFS/ECMWF
SOLUTIONS KEEPING LINGERING MOISTURE IN THIS AREA AT THE BEGINNING
OF THE PERIOD WITH THE CURRENT FORECAST STORM TRACK.

SUNDAY...EXPECT CLEARING FROM WEST TO EAST...WITH TEMPERATURES
GENERALLY REMAINING AROUND 5-7 DEGREES BELOW NORMAL SATURDAY AND
SUNDAY IN RESPONSE TO COOL AND DRY MID TO UPPER LEVEL
NORTHERLY/NORTHWESTERLY FLOW. OPERATIONAL MODELS GENERALLY AGREE IN
KEEPING THIS PATTERN AROUND INTO MONDAY AS WELL...BEFORE GIVING WAY
TO HIGHLY AMPLIFIED RIDGING TUESDAY AND WEDNESDAY. AS A RESULT OF
BETTER MODEL AGREEMENT TONIGHT...LOWERED TEMPERATURES WITH MODERATE-
HIGH CONFIDENCE FROM INHERITED GRIDS AREA-WIDE SATURDAY THROUGH
MONDAY. TEMPERATURES ARE EXPECTED TO WARM BACK TO AROUND AVERAGE
MONDAY BEFORE RETURNING TO ABOVE AVERAGE TUESDAY AND WEDNESDAY AS
THE RIDGE BUILDS INTO THE AREA. BENIGN WEATHER WILL PREVAIL FROM
SUNDAY ONWARD OTHERWISE.
&&

.AVIATION...FOR MCCARRAN...LIGHT AND VARIABLE WINDS THIS MORNING
WILL BECOME EASTERLY UNDER 10 KNOTS BY THE LATE MORNING THEN
SOUTHEAST AROUND 10 KNOTS AROUND 20Z. MAINLY SCT-BKN CLOUDS AOA 12K
FEET THROUGH THIS EVENING WITH ISOLATED SPRINKLES OR A SHRA POSSIBLE
IN THE VALLEY AFTER 21Z WITH A BETTER CHANCE OF SHRA/TSRA OVER THE
MOUNTAINS AROUND THE VALLEY. GUSTY AND ERRATIC WINDS ARE POSSIBLE IN
AND NEAR ANY SHRA/TSRA OR OUTFLOW BOUNDARIES.

.FOR THE REST OF SOUTHERN NEVADA...NORTHWEST ARIZONA...AND SOUTHEAST
CALIFORNIA...ANOTHER ROUND OF SOUTH TO SOUTHWEST WINDS ARE EXPECTED
BY THIS AFTERNOON AT 7-14 KTS WITH GUSTS TO 20 KTS. THE EXCEPTION
WILL BE ERRATIC DIRECTIONS AND STRONGER GUSTS NEAR ANY ISOLATED
SHRA/TSRA WHICH WILL BE AROUND ESPECIALLY WEDNESDAY AFTERNOON.
SHRA/TSRA WILL BE MORE NUMEROUS OVER THE MOUNTAINS. BASES WILL BE
DOWN AS LOW AS 6K-10K FEET NEAR SHRA/TSRA OTHERWISE MAINLY 12K-18K
FEET.
&&

.SPOTTER INFORMATION STATEMENT...SPOTTERS SHOULD REPORT ACCORDING TO
STANDARD OPERATING PROCEDURES.
&&

$$

SHORT TERM/AVIATION...STACHELSKI
LONG TERM...PULLIN

FOR MORE FORECAST INFORMATION...SEE US ON OUR WEBPAGE:

HTTP://WEATHER.GOV/LASVEGAS OR FOLLOW US ON FACEBOOK AND TWITTER




000
FXUS65 KVEF 221613
AFDVEF

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
912 AM PDT WED APR 22 2015

.SYNOPSIS...SEVERAL SYSTEMS WILL PASS ACROSS OR NEAR THE AREA
THROUGH SATURDAY EVENING BRINGING A CHANCE FOR SHOWERS AND
THUNDERSTORMS ESPECIALLY IN THE HIGHER ELEVATIONS AND DURING THE
AFTERNOON AND EVENING HOURS. DRIER AIR WILL MOVE IN SATURDAY NIGHT
INTO SUNDAY. HIGH TEMPERATURES ARE EXPECTED TO REMAIN BELOW NORMAL
THROUGH SUNDAY THEN MODERATE STARTING ON MONDAY AS AN AREA OF HIGH
PRESSURE ALOFT BUILDS INTO THE SOUTHWEST.
&&

.UPDATE...MODELS ARE IN GOOD AGREEMENT THAT DRY AND STABLE AIR WILL
PERSIST TODAY AND TONIGHT ACROSS SOUTHERN AND CENTRAL MOHAVE COUNTY
AND ACROSS EASTERN PORTIONS OF SAN BERNARDINO AND CLARK COUNTIES. I
UPDATED TO REMOVE MENTION OF SHOWERS/THUNDERSTORMS AND TO DECREASE
CLOUD COVER TODAY AND TONIGHT IN THOSE AREAS. OTHERWISE THE FORECAST
LOOKS GOOD. -HARRISON-

&&

.PREV DISCUSSION...
300 AM PDT WED APR 22 2015

.SHORT TERM...TODAY THROUGH FRIDAY NIGHT.

WATER VAPOR AND SATELLITE IMAGERY SHOWED THE CENTER OF THE MID/UPPER
LEVEL LOW WAS SWIRLING ACROSS SOUTHEASTERN TULARE AND EASTERN KERN
COUNTIES. A DRY SLOT HAS PUNCHED IN FROM THE SOUTH UP THE COLORADO
RIVER VALLEY AND ERODED AWAY MUCH OF THE CLOUDS ACROSS THE MOJAVE
DESERT WITH THE EXCEPTION OF CLOSER TO THE LOW CENTER, HOWEVER,
THESE SHOULD FILL BACK IN BY LATER THIS MORNING AS CLOUDS ON THE
SOUTHERN EDGE OF THE LOW CENTER MAKE A MOVE EAST AND ADDITIONAL
CUMULUS CLOUDS DEVELOP WITH THE HEATING OF THE DAY IN THE AREAS VOID
OF THEM NOW. WITH THE COLD POOL ALOFT ASSOCIATED WITH THIS LOW
OVERHEAD PROVIDING INSTABILITY AND LINGERING MOISTURE IN PLACE,
SHOWERS AND THUNDERSTORMS SHOULD ONCE AGAIN DEVELOP TODAY AND BECOME
MORE COMMONPLACE BY THE AFTERNOON AND EVENING HOURS ESPECIALLY OVER
THE HIGHER ELEVATIONS. LOOKING AT THE FORECAST SOUNDINGS, WE STILL
HAVE VERY DRY LOW-LEVELS BELOW 700 MB WITH A NICE INVERTED-V LOOK TO
THE PROFILE SO GUSTY AND ERRATIC WINDS WILL BE AN ISSUE IN AND NEAR
ANY SHOWERS AND THUNDERSTORMS. IN ADDITION, FORECAST SOUNDINGS FROM
THE GFS, WRF AND ECMWF DO SHOW SOME SHEAR IN THE WINDS AT LAS VEGAS
ESPECIALLY IN THE 700-550 MB LAYER WHERE BACKING IS NOTED. THE BEST
INSTABILITY IS SHOWN TO EXTEND ACROSS NORTHERN SAN BERNARDINO AND
SOUTHERN INYO COUNTIES INTO SOUTHERN NYE AND WESTERN AND SOUTHERN
CLARK COUNTIES ON THE GFS. SO WE COULD SEE SOME HAIL AS WELL IF WE
GET ANY STRONGER CELLS. AWAY FROM ANY SHOWERS AND THUNDERSTORMS
EXPECT A PARTLY TO MOSTLY CLOUDY SKY WITH TEMPS ABOUT 4-7 DEGREES
BELOW NORMAL THIS AFTERNOON FOR HIGHS.

WE SHOULD SEE ACTIVITY DECREASE IN COVERAGE THIS EVENING WITH THE
LOSS OF HEATING. THE GREATEST CHANCE SHOWERS AND THUNDERSTORMS WILL
REMAIN OVER INYO, CENTRAL/SOUTHERN NYE AND NORTHERN SAN BERNARDINO
COUNTIES CLOSEST TO THE CENTER OF WHAT WILL BE A WEAKENED LOW AS IT
TRANSITIONS TO MORE OF A BROAD PIECE OF ENERGY. ELSEWHERE CLOUDS
WILL ERODE SOMEWHAT BUT REMAIN AROUND IN MANY AREAS OVERNIGHT AND
THERE MAY BE A SPRINKLE OR TWO.

ANOTHER MID/UPPER LEVEL LOW DIVE SOUTH OFF THE COAST OF CALIFORNIA
TODAY AND MERGE WITH THE REMNANT ENERGY LEFT OVER OUR AREA TONIGHT.
THIS NEW LOW WILL REMAIN OVER SOCAL TOMORROW AND THEN HEAD EAST
TOMORROW NIGHT. ONCE AGAIN THIS WILL KEEP ENOUGH INSTABILITY ACROSS
THE AREA TO TRIGGER SHOWERS AND SOME THUNDERSTORMS ESPECIALLY IN THE
AFTERNOON AND EVENING HOURS. HOWEVER, WITH ADDITIONAL MOISTURE BEING
PUSHED INTO THE AREA THE CHANCES OF SHOWERS AND THUNDERSTORMS SHOULD
INCREASE. PWATS ARE FORECAST TO RISE TO 0.59 TO 0.77 INCH BY THE
EVENING IN LAS VEGAS PER THE GFS, ECMWF AND WRF SOUNDINGS. SO
ACTIVITY SHOULD BE ABLE TO PUT DOWN A LITTLE MORE IN THE WAY OF
PRECIPITATION ESPECIALLY IF WE GET ANY SLOW MOVING OR STRONGER
THUNDERSTORMS. HIGH TEMPS SHOULD DROP SEVERAL DEGREES FROM WEDNESDAY
AND BE ABOUT 7-10 DEGREES BELOW NORMAL GIVEN THE EXTENSIVE CLOUD
COVER OVER THE AREA.

SHOWER AND THUNDERSTORM ACTIVITY SHOULD DECREASE IN COVERAGE AGAIN
THURSDAY NIGHT BEFORE REDEVELOPING ON FRIDAY AS THE FLOW ALOFT TURNS
NORTHWEST AND ANOTHER WEAK MID/UPPER LEVEL SHORTWAVE AND ASSOCIATED
ENERGY MAX CROSS THE AREA. GIVEN THE TRAJECTORY OF THIS FEATURE,
THIS SHOULD FAVOR THE SOUTHERN GREAT BASIN FOR THE HIGHEST POPS WITH
LITTLE CHANCE FOR SHOWERS AND THUNDERSTORMS SOUTH OF I-40 ESPECIALLY
IN SAN BERNARDINO COUNTY. ONCE AGAIN TEMPS WILL BE BELOW NORMAL FOR
HIGHS BY 6-10 DEGREES.

.LONG TERM...SATURDAY MORNING THROUGH WEDNESDAY.

THE LONG TERM PERIOD BEGINS WITH THE LAST IN THE SERIES OF RECENT
SHORTWAVES BEGINNING TO DIG INTO THE AREA. OPERATIONAL MODEL
GUIDANCE IS IN MUCH BETTER AGREEMENT TONIGHT IN THE STRENGTH/TIMING
OF THIS SYSTEM...ALLOWING FOR MUCH HIGHER CONFIDENCE IN GRID
CHANGES. MODEL SOLUTIONS HAVE SETTLED ON A DEEPENING OPENING WAVE TO
TRAVERSE ACROSS THE AREA ON SATURDAY BEFORE CLOSING OFF EAST OF THE
AREA IN THE FOUR CORNERS REGION ON SUNDAY. THIS WILL SPELL ANOTHER
DAY OF SHOWER AND THUNDERSTORM CHANCES ON SATURDAY...PARTICULARLY
ACROSS NORTHERN INYO COUNTY AND THE GREAT BASIN ZONES WHERE A SWATH
OF MODEST INSTABILITY HAS BEEN NOTED IN BOTH THE OPERATIONAL GFS AND
ECMWF SATURDAY AFTERNOON. ADDED A MENTION OF THUNDER INTO THE GRIDS
IN THESE AREAS AS A RESULT. INCREASED POPS TO ALLOW FOR A MENTION OF
SHOWERS IN THE 00Z SUNDAY GRIDS IN LINCOLN...EASTERN CLARK AND
MOHAVE COUNTIES...AS THE OPEN WAVE DIGS SOUTHEASTWARD SATURDAY
EVENING ACROSS THESE AREAS BRINGING WITH IT AN ADDITIONAL PUSH OF
MOISTURE AND PLENTY OF FORCING TO GENERATE SHOWERS ACROSS THESE
AREAS. ALSO DECIDED TO BUMP POPS UP A BIT ACROSS EASTERN MOHAVE
COUNTY IN THE 12Z SUNDAY GRIDS IN RESPONSE TO BOTH THE GFS/ECMWF
SOLUTIONS KEEPING LINGERING MOISTURE IN THIS AREA AT THE BEGINNING
OF THE PERIOD WITH THE CURRENT FORECAST STORM TRACK.

SUNDAY...EXPECT CLEARING FROM WEST TO EAST...WITH TEMPERATURES
GENERALLY REMAINING AROUND 5-7 DEGREES BELOW NORMAL SATURDAY AND
SUNDAY IN RESPONSE TO COOL AND DRY MID TO UPPER LEVEL
NORTHERLY/NORTHWESTERLY FLOW. OPERATIONAL MODELS GENERALLY AGREE IN
KEEPING THIS PATTERN AROUND INTO MONDAY AS WELL...BEFORE GIVING WAY
TO HIGHLY AMPLIFIED RIDGING TUESDAY AND WEDNESDAY. AS A RESULT OF
BETTER MODEL AGREEMENT TONIGHT...LOWERED TEMPERATURES WITH MODERATE-
HIGH CONFIDENCE FROM INHERITED GRIDS AREA-WIDE SATURDAY THROUGH
MONDAY. TEMPERATURES ARE EXPECTED TO WARM BACK TO AROUND AVERAGE
MONDAY BEFORE RETURNING TO ABOVE AVERAGE TUESDAY AND WEDNESDAY AS
THE RIDGE BUILDS INTO THE AREA. BENIGN WEATHER WILL PREVAIL FROM
SUNDAY ONWARD OTHERWISE.
&&

.AVIATION...FOR MCCARRAN...LIGHT AND VARIABLE WINDS THIS MORNING
WILL BECOME EASTERLY UNDER 10 KNOTS BY THE LATE MORNING THEN
SOUTHEAST AROUND 10 KNOTS AROUND 20Z. MAINLY SCT-BKN CLOUDS AOA 12K
FEET THROUGH THIS EVENING WITH ISOLATED SPRINKLES OR A SHRA POSSIBLE
IN THE VALLEY AFTER 21Z WITH A BETTER CHANCE OF SHRA/TSRA OVER THE
MOUNTAINS AROUND THE VALLEY. GUSTY AND ERRATIC WINDS ARE POSSIBLE IN
AND NEAR ANY SHRA/TSRA OR OUTFLOW BOUNDARIES.

.FOR THE REST OF SOUTHERN NEVADA...NORTHWEST ARIZONA...AND SOUTHEAST
CALIFORNIA...ANOTHER ROUND OF SOUTH TO SOUTHWEST WINDS ARE EXPECTED
BY THIS AFTERNOON AT 7-14 KTS WITH GUSTS TO 20 KTS. THE EXCEPTION
WILL BE ERRATIC DIRECTIONS AND STRONGER GUSTS NEAR ANY ISOLATED
SHRA/TSRA WHICH WILL BE AROUND ESPECIALLY WEDNESDAY AFTERNOON.
SHRA/TSRA WILL BE MORE NUMEROUS OVER THE MOUNTAINS. BASES WILL BE
DOWN AS LOW AS 6K-10K FEET NEAR SHRA/TSRA OTHERWISE MAINLY 12K-18K
FEET.
&&

.SPOTTER INFORMATION STATEMENT...SPOTTERS SHOULD REPORT ACCORDING TO
STANDARD OPERATING PROCEDURES.
&&

$$

SHORT TERM/AVIATION...STACHELSKI
LONG TERM...PULLIN

FOR MORE FORECAST INFORMATION...SEE US ON OUR WEBPAGE:

HTTP://WEATHER.GOV/LASVEGAS OR FOLLOW US ON FACEBOOK AND TWITTER





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