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000
FXUS66 KPDT 242130
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
230 PM PDT THU APR 24 2014

.SHORT TERM...TONIGHT THROUGH SATURDAY...A COLD FRONT ASSOCIATED
WITH AN UPPER LEVEL TROUGH WILL CONTINUE ACROSS THE AREA TONIGHT.
SHOWERS AND THUNDERSTORMS WILL CONTINUE THIS EVENING ACROSS THE
EASTERN PORTION OF THE CWA.  AS THE UPPER LEVEL TROUGH DEEPENS OVER
THE AREA TONIGHT...POPS WILL INCREASE AS MOISTURE FROM THE SOUTH IS
TRANSPORTED ACROSS THE MOUNTAINS OF NORTHEAST OREGON.  THERE IS A
CHANCE THE THESE SHOWERS WILL REACH THE FOOTHILLS...BUT NOT
ANTICIPATING THE BASIN AREA.  WILL HAVE TO MONITOR AND MAKE UPDATES
AS NEEDED.  BY TOMORROW A BETTER CHANCE FOR SHOWERS TO REACH THE
BASIN AREA.

OTHER CONCERNS TOMORROW...AS THE UPPER LEVEL TROUGH CENTERS OVER THE
CWA...THERE IS THE POSSIBILITY OF ISOLATED THUNDER.  THE ISSUE IS
THAT MODELS HAVE A MID LEVEL CAP AT ABOUT 650MB.  THIS WILL INHIBIT
TOWERING CUMULUS TO REACH THE POTENTIAL FOR THUNDERSTORMS.
850-500MB TEMPERATURE DIFFERENCES ARE AROUND 30 CELSIUS.  IF ENOUGH
SURFACED BASED HEATING OCCURS TO BREAK THE MID LEVEL CAP...THEN
ISOLATED TO SCATTERED THUNDERSTORMS WILL DEFINITELY BE POSSIBLE.

SATURDAY...AS THE TROUGH PUSHES OFF TO THE EAST...SHOWERS WILL
CONTINUE WITH SNOW SHOWERS ABOVE 4000FT.  RIGHT NOW THERE IS A
SLIGHT CHANCE THAT AREAS ABOVE 4500FT IN WALLOWA COUNTY COULD
RECEIVE 2 TO 3 INCHES SATURDAY MORNING.  HAVE NOT ISSUED ANY
HIGHLIGHT FOR THE AREA...AS OTHER MODELS KEEP THE SNOW ABOVE
5000FT.  RIGHT NOW THE ONLY AREAS THAT LOOK TO BE AFFECTED BY THE
POTENTIAL SNOW...WOULD BE SR-3 FROM JOSEPH TO FLORA.  WEBER

.LONG TERM...SATURDAY NIGHT THROUGH WEDNESDAY. A STORM SYSTEM WILL
TAKE AIM ON THE TWO STATE AREA SATURDAY NIGHT AND SUNDAY WITH
INCREASING CLOUDS AND SHOWERS BEFORE MOVING EAST OF THE REGION
MONDAY. HOWEVER THE UNSETTLED WEATHER WILL PERSIST INTO THE
BEGINNING OF THE WEEK BEFORE A RIDGE OF HIGH PRESSURE BUILDS INTO
WA/OR TUESDAY AND WEDNESDAY AND DRIER CONDITIONS ARE EXPECTED.
TEMPERATURES WILL REMAIN SLIGHTLY BELOW NORMAL UNTIL A WARMING TREND
IS EXPECTED TOWARD THE MIDDLE OF THE WORK WEEK.

&&

.AVIATION...A STORM SYSTEM WILL CREATE AREAS OF MVFR CEILINGS FOR
ALL TAF SITES INTO TONIGHT AND LCL IFR CONDITIONS ARE POSSIBLE IN
AND NEAR SHOWERS. IN ADDITION BRIEF GUSTY WINDS TO 30 KTS IS
POSSIBLE ALONG WITH AN ISOLD TSRA UNTIL 02Z. OTHERWISE THE AREAS OF
MVFR CEILINGS ARE EXPECTED THROUGH THE NIGHT.

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  39  58  37  59 /  40  50  20  10
ALW  43  59  42  60 /  40  50  30  10
PSC  44  63  41  65 /  20  10  20  10
YKM  37  60  36  60 /  20  10  10  10
HRI  42  62  38  63 /  20  20  20  10
ELN  35  59  35  59 /  20  10  10  10
RDM  31  50  27  53 /  50  20  30  10
LGD  37  50  34  53 /  70  60  40  20
GCD  35  46  30  49 /  60  40  40  10
DLS  41  61  40  60 /  30  20  30  10

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...NONE.
WA...NONE.
&&

THREAT INDEX
FRIDAY : YELLOW
SATURDAY : GREEN
SUNDAY : GREEN

GREEN: NONE OR LIMITED NEED FOR WATCHES, WARNINGS, OR ADVISORIES.
YELLOW: A FEW WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.
RED: NUMEROUS WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

89/97/97













000
FXUS66 KPDT 242130
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
230 PM PDT THU APR 24 2014

.SHORT TERM...TONIGHT THROUGH SATURDAY...A COLD FRONT ASSOCIATED
WITH AN UPPER LEVEL TROUGH WILL CONTINUE ACROSS THE AREA TONIGHT.
SHOWERS AND THUNDERSTORMS WILL CONTINUE THIS EVENING ACROSS THE
EASTERN PORTION OF THE CWA.  AS THE UPPER LEVEL TROUGH DEEPENS OVER
THE AREA TONIGHT...POPS WILL INCREASE AS MOISTURE FROM THE SOUTH IS
TRANSPORTED ACROSS THE MOUNTAINS OF NORTHEAST OREGON.  THERE IS A
CHANCE THE THESE SHOWERS WILL REACH THE FOOTHILLS...BUT NOT
ANTICIPATING THE BASIN AREA.  WILL HAVE TO MONITOR AND MAKE UPDATES
AS NEEDED.  BY TOMORROW A BETTER CHANCE FOR SHOWERS TO REACH THE
BASIN AREA.

OTHER CONCERNS TOMORROW...AS THE UPPER LEVEL TROUGH CENTERS OVER THE
CWA...THERE IS THE POSSIBILITY OF ISOLATED THUNDER.  THE ISSUE IS
THAT MODELS HAVE A MID LEVEL CAP AT ABOUT 650MB.  THIS WILL INHIBIT
TOWERING CUMULUS TO REACH THE POTENTIAL FOR THUNDERSTORMS.
850-500MB TEMPERATURE DIFFERENCES ARE AROUND 30 CELSIUS.  IF ENOUGH
SURFACED BASED HEATING OCCURS TO BREAK THE MID LEVEL CAP...THEN
ISOLATED TO SCATTERED THUNDERSTORMS WILL DEFINITELY BE POSSIBLE.

SATURDAY...AS THE TROUGH PUSHES OFF TO THE EAST...SHOWERS WILL
CONTINUE WITH SNOW SHOWERS ABOVE 4000FT.  RIGHT NOW THERE IS A
SLIGHT CHANCE THAT AREAS ABOVE 4500FT IN WALLOWA COUNTY COULD
RECEIVE 2 TO 3 INCHES SATURDAY MORNING.  HAVE NOT ISSUED ANY
HIGHLIGHT FOR THE AREA...AS OTHER MODELS KEEP THE SNOW ABOVE
5000FT.  RIGHT NOW THE ONLY AREAS THAT LOOK TO BE AFFECTED BY THE
POTENTIAL SNOW...WOULD BE SR-3 FROM JOSEPH TO FLORA.  WEBER

.LONG TERM...SATURDAY NIGHT THROUGH WEDNESDAY. A STORM SYSTEM WILL
TAKE AIM ON THE TWO STATE AREA SATURDAY NIGHT AND SUNDAY WITH
INCREASING CLOUDS AND SHOWERS BEFORE MOVING EAST OF THE REGION
MONDAY. HOWEVER THE UNSETTLED WEATHER WILL PERSIST INTO THE
BEGINNING OF THE WEEK BEFORE A RIDGE OF HIGH PRESSURE BUILDS INTO
WA/OR TUESDAY AND WEDNESDAY AND DRIER CONDITIONS ARE EXPECTED.
TEMPERATURES WILL REMAIN SLIGHTLY BELOW NORMAL UNTIL A WARMING TREND
IS EXPECTED TOWARD THE MIDDLE OF THE WORK WEEK.

&&

.AVIATION...A STORM SYSTEM WILL CREATE AREAS OF MVFR CEILINGS FOR
ALL TAF SITES INTO TONIGHT AND LCL IFR CONDITIONS ARE POSSIBLE IN
AND NEAR SHOWERS. IN ADDITION BRIEF GUSTY WINDS TO 30 KTS IS
POSSIBLE ALONG WITH AN ISOLD TSRA UNTIL 02Z. OTHERWISE THE AREAS OF
MVFR CEILINGS ARE EXPECTED THROUGH THE NIGHT.

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  39  58  37  59 /  40  50  20  10
ALW  43  59  42  60 /  40  50  30  10
PSC  44  63  41  65 /  20  10  20  10
YKM  37  60  36  60 /  20  10  10  10
HRI  42  62  38  63 /  20  20  20  10
ELN  35  59  35  59 /  20  10  10  10
RDM  31  50  27  53 /  50  20  30  10
LGD  37  50  34  53 /  70  60  40  20
GCD  35  46  30  49 /  60  40  40  10
DLS  41  61  40  60 /  30  20  30  10

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...NONE.
WA...NONE.
&&

THREAT INDEX
FRIDAY : YELLOW
SATURDAY : GREEN
SUNDAY : GREEN

GREEN: NONE OR LIMITED NEED FOR WATCHES, WARNINGS, OR ADVISORIES.
YELLOW: A FEW WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.
RED: NUMEROUS WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

89/97/97












000
FXUS66 KPDT 241759 AAA
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
1055 AM PDT THU APR 24 2014

.UPDATE...CURRENT FORECAST REMAINS ON TRACK WITH SOME MINOR
ADJUSTMENTS.  HAVE EXPANDED THE SLIGHT CHANCE THUNDER COVERAGE OVER
THE YAKIMA AND KITTITAS VALLEY FOR THE AFTERNOON PERIOD.  850-500MB
TEMPERATURE CHANGE INDICATES GREATER THAN 30 DEGREES CELSIUS.
ALTHOUGH DRIER AIR IS EXPECTED TO INTRUDE...THE POTENTIAL STILL
EXISTS FOR ISOLATED SHOWERS...AND THUS THUNDER CANT BE RULED OUT OF
THESE SHOWERS.  THE THUNDERSTORMS EXPECTED TODAY COULD PRODUCE GUSTY
WINDS AND SMALL HAIL. WEBER

.AVIATION...A STORM SYSTEM WILL CREATE AREAS OF MVFR CEILINGS FOR
ALL TAF SITES INTO TONIGHT AND LCL IFR CONDITIONS ARE POSSIBLE IN
AND NEAR SHOWERS. IN ADDITION BRIEF GUSTY WINDS TO 30 KTS IS
POSSIBLE ALONG WITH AN ISOLD TSRA UNTIL 02Z. OTHERWISE THE AREAS OF
MVFR CEILINGS ARE EXPECTED THROUGH THE NIGHT.

&&

.PREV DISC... /ISSUED 655 AM PDT THU APR 24 2014/

SHORT TERM...TODAY THROUGH SATURDAY AFTERNOON...UPPER LEVEL TROUGH
DIGGING SOUTH OFFSHORE WILL BACK FLOW ALOFT TO SOUTH TODAY JUST
AHEAD OF A COLD FRONT. AIR MASS WILL BECOME UNSTABLE BY LATE THIS
MORNING. NEW 06Z NAM12 MOS GUIDANCE SHOWS 30-60 PERCENT CHANCE OF
THUNDERSTORMS AT HERMISTON, PENDLETON, WALLA WALLA, MEACHAM AND AT
LA GRANDE FROM 11AM THIS MORNING THROUGH THIS AFTERNOON. AS SUCH I
AMENDED THE WEATHER GRID FOR THIS AFTERNOON TO INDICATE THAT THERE
IS A CHANCE OF THUNDERSTORMS ALONG THE FOOTHILLS OF THE BLUE
MOUNTAINS EASTWARD THROUGH WALLOWA COUNTY AS WELL AS IN CROOK,
WHEELER, AND GRANT COUNTIES. MODELS ALSO SHOW A VORTICITY MAX MOVING
ACROSS FORECAST ARE TODAY, WHICH WILL PROVIDE GOOD DYNAMIC LIFT. IN
ADDITION, A COLD FRONT WILL MOVE THROUGH THE FORECAST AREA THIS
AFTERNOON AND ACT AS A TRIGGER FOR THUNDERSTORM DEVELOPMENT IN
EASTERN OREGON AND SOUTHEAST WASHINGTON. SCATTERED SHOWERS EXPECTED
TONIGHT AND FRIDAY WITH A SLIGHT CHANCE OF THUNDERSTORMS FRIDAY
AFTERNOON OVER THE BLUE MOUNTAINS. FRIDAY LOOKS TO BE DRY DUE TO
HIGH PRESSURE.  POLAN

LONG TERM...SATURDAY NIGHT THROUGH THURSDAY...SATURDAY NIGHT WILL
SEE AN UPPER LEVEL TROUGH MOVING OFF TO THE EAST WHILE ANOTHER
SYSTEM IN A MOIST AND PROGRESSIVE WESTERLY FLOW WILL BE MOVING INTO
THE AREA. THIS WILL GIVE US A CHANCE OF RAIN WITH THE MOUNTAINS
HAVING A RAIN/SNOW MIX SATURDAY NIGHT THROUGH SUNDAY. THE MOISTURE
WILL BEGIN TO TAPER OFF SUNDAY NIGHT WITH JUST A SLIGHT CHANCE OF
RAIN IN THE LOWER ELEVATIONS AND A CHANCE OF RAIN AND SNOW SHOWERS
IN THE MOUNTAINS ABOVE 4500 FEET. MONDAY WILL SEE RIDGING BUILDING
OVER THE AREA AND THE LOWER ELEVATIONS WILL BE DRY WHILE A SLIGHT
CHANCE OF RAIN AND SNOW SHOWERS WILL CONTINUE IN THE MOUNTAINS.
MODELS ARE IN AGREEMENT IN HAVING THE RIDGE REMAIN OVER THE AREA
THROUGH AT LEAST WEDNESDAY NIGHT WHICH WILL GIVE US A PERIOD OF DRY
WEATHER AND A WARMING TREND. THE GFS WANTS TO BRING AN UPPER LOW TO
THE CANADIAN BORDER AREA, POSSIBLY ON THURSDAY, THOUGH THE TIMING
CHANGES ON EACH OF THE LAST COUPLE OF RUNS WHILE THE ECMWF DOES NOT
HAVE THIS FEATURE. IF THIS SYSTEM PROVES TO BE REAL, THE GFS IS
USUALLY TOO FAST BRING THEM IN THIS FAR OUT IN THE LONG TERM PERIOD
SO HAVE KEPT THE FORECAST DRY THOUGH POPS WERE RAISED TO AROUND 10
PERCENT IN THE WASHINGTON CASCADES. HIGHS WILL BE IN THE MID 50S TO
MID 60S WITH MID 40S TO MID 50S IN THE MOUNTAINS SUNDAY AND MONDAY
THEN RISE TO THE 70S WITH 60S IN THE MOUNTAINS TUESDAY THROUGH
THURSDAY. PERRY

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  61  39  57  38 / 100  60  60  20
ALW  61  42  58  42 / 100  60  70  30
PSC  66  43  63  41 /  70  20  20  10
YKM  60  35  60  36 /  30  10  20  10
HRI  64  42  61  39 /  60  40  40  20
ELN  59  36  59  35 /  40  10  20  10
RDM  56  30  49  27 /  60  60  60  20
LGD  56  36  52  35 / 100  70  80  50
GCD  54  34  46  30 /  80  70  90  40
DLS  60  40  60  40 /  80  40  40  30

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...NONE.
WA...NONE.
&&

THREAT INDEX
TODAY : YELLOW
FRIDAY : GREEN
SATURDAY : GREEN

GREEN: NONE OR LIMITED NEED FOR WATCHES, WARNINGS, OR ADVISORIES.
YELLOW: A FEW WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.
RED: NUMEROUS WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

89/83/97







000
FXUS66 KPDT 241540
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
840 AM PDT THU APR 24 2014

.UPDATE...CURRENT FORECAST REMAINS ON TRACK WITH SOME MINOR
ADJUSTMENTS.  HAVE EXPANDED THE SLIGHT CHANCE THUNDER COVERAGE OVER
THE YAKIMA AND KITTITAS VALLEY FOR THE AFTERNOON PERIOD.  850-500MB
TEMPERATURE CHANGE INDICATES GREATER THAN 30 DEGREES CELSIUS.
ALTHOUGH DRIER AIR IS EXPECTED TO INTRUDE...THE POTENTIAL STILL
EXISTS FOR ISOLATED SHOWERS...AND THUS THUNDER CANT BE RULED OUT OF
THESE SHOWERS.  THE THUNDERSTORMS EXPECTED TODAY COULD PRODUCE GUSTY
WINDS AND SMALL HAIL. WEBER

&&

.PREV DISC... /ISSUED 655 AM PDT THU APR 24 2014/

SHORT TERM...TODAY THROUGH SATURDAY AFTERNOON...UPPER LEVEL TROUGH
DIGGING SOUTH OFFSHORE WILL BACK FLOW ALOFT TO SOUTH TODAY JUST
AHEAD OF A COLD FRONT. AIR MASS WILL BECOME UNSTABLE BY LATE THIS
MORNING. NEW 06Z NAM12 MOS GUIDANCE SHOWS 30-60 PERCENT CHANCE OF
THUNDERSTORMS AT HERMISTON, PENDLETON, WALLA WALLA, MEACHAM AND AT
LA GRANDE FROM 11AM THIS MORNING THROUGH THIS AFTERNOON. AS SUCH I
AMENDED THE WEATHER GRID FOR THIS AFTERNOON TO INDICATE THAT THERE
IS A CHANCE OF THUNDERSTORMS ALONG THE FOOTHILLS OF THE BLUE
MOUNTAINS EASTWARD THROUGH WALLOWA COUNTY AS WELL AS IN CROOK,
WHEELER, AND GRANT COUNTIES. MODELS ALSO SHOW A VORTICITY MAX MOVING
ACROSS FORECAST ARE TODAY, WHICH WILL PROVIDE GOOD DYNAMIC LIFT. IN
ADDITION, A COLD FRONT WILL MOVE THROUGH THE FORECAST AREA THIS
AFTERNOON AND ACT AS A TRIGGER FOR THUNDERSTORM DEVELOPMENT IN
EASTERN OREGON AND SOUTHEAST WASHINGTON. SCATTERED SHOWERS EXPECTED
TONIGHT AND FRIDAY WITH A SLIGHT CHANCE OF THUNDERSTORMS FRIDAY
AFTERNOON OVER THE BLUE MOUNTAINS. FRIDAY LOOKS TO BE DRY DUE TO
HIGH PRESSURE.  POLAN

LONG TERM...SATURDAY NIGHT THROUGH THURSDAY...SATURDAY NIGHT WILL
SEE AN UPPER LEVEL TROUGH MOVING OFF TO THE EAST WHILE ANOTHER
SYSTEM IN A MOIST AND PROGRESSIVE WESTERLY FLOW WILL BE MOVING INTO
THE AREA. THIS WILL GIVE US A CHANCE OF RAIN WITH THE MOUNTAINS
HAVING A RAIN/SNOW MIX SATURDAY NIGHT THROUGH SUNDAY. THE MOISTURE
WILL BEGIN TO TAPER OFF SUNDAY NIGHT WITH JUST A SLIGHT CHANCE OF
RAIN IN THE LOWER ELEVATIONS AND A CHANCE OF RAIN AND SNOW SHOWERS
IN THE MOUNTAINS ABOVE 4500 FEET. MONDAY WILL SEE RIDGING BUILDING
OVER THE AREA AND THE LOWER ELEVATIONS WILL BE DRY WHILE A SLIGHT
CHANCE OF RAIN AND SNOW SHOWERS WILL CONTINUE IN THE MOUNTAINS.
MODELS ARE IN AGREEMENT IN HAVING THE RIDGE REMAIN OVER THE AREA
THROUGH AT LEAST WEDNESDAY NIGHT WHICH WILL GIVE US A PERIOD OF DRY
WEATHER AND A WARMING TREND. THE GFS WANTS TO BRING AN UPPER LOW TO
THE CANADIAN BORDER AREA, POSSIBLY ON THURSDAY, THOUGH THE TIMING
CHANGES ON EACH OF THE LAST COUPLE OF RUNS WHILE THE ECMWF DOES NOT
HAVE THIS FEATURE. IF THIS SYSTEM PROVES TO BE REAL, THE GFS IS
USUALLY TOO FAST BRING THEM IN THIS FAR OUT IN THE LONG TERM PERIOD
SO HAVE KEPT THE FORECAST DRY THOUGH POPS WERE RAISED TO AROUND 10
PERCENT IN THE WASHINGTON CASCADES. HIGHS WILL BE IN THE MID 50S TO
MID 60S WITH MID 40S TO MID 50S IN THE MOUNTAINS SUNDAY AND MONDAY
THEN RISE TO THE 70S WITH 60S IN THE MOUNTAINS TUESDAY THROUGH
THURSDAY. PERRY

AVIATION...12Z TAFS...AN UPPER LEVEL TROUGH WILL SEND MOIST AIR
INTO THE AREA ON A SOUTHWEST FLOW TODAY. THIS WILL CREATE ENOUGH
INSTABILITY FOR SHOWERS THROUGH THE DAY THOUGH THERE MAY BE A LULL
FROM 15Z TO 18Z. ADDITIONALLY THE INSTABILITY MAY GENERATE ISOLATED
THUNDERSTORMS OVER MUCH OF THE AREA FROM 18Z TO 00Z AND LINGER ON
THROUGH 03Z FROM THE BLUE MOUNTAINS EASTWARD. HAVE ADDED VCTS AND A
CB LAYER FOR KPDT, KALW AND KPSC WHERE THUNDER IS LIKELIEST. SHOWERS
WILL END BY 03Z THOUGH ANOTHER DISTURBANCE WILL BEGIN ENTERING THE
AREA FROM THE SOUTH AFTER 06Z AND KRDM AND KBDN MAY SEE A MIX OF
RAIN AND SNOW SHOWERS THROUGH 12Z. SURFACE WINDS ARE ALREADY
INCREASING EARLY THIS MORNING AND ALL TAF SITES WILL HAVE WINDS OF
15 TO 25 KTS WITH GUSTS TO 35 KTS FROM 18Z TO 02Z. WINDS WILL
DECREASE TO 15 KTS OR LESS AFTER 05Z. PERRY

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  61  39  57  38 / 100  60  60  20
ALW  61  42  58  42 / 100  60  70  30
PSC  66  43  63  41 /  70  20  20  10
YKM  60  35  60  36 /  30  10  20  10
HRI  64  42  61  39 /  60  40  40  20
ELN  59  36  59  35 /  40  10  20  10
RDM  56  30  49  27 /  60  60  60  20
LGD  56  36  52  35 / 100  70  80  50
GCD  54  34  46  30 /  80  70  90  40
DLS  60  40  60  40 /  80  40  40  30

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...NONE.
WA...NONE.
&&

THREAT INDEX
TODAY : YELLOW
FRIDAY : GREEN
SATURDAY : GREEN

GREEN: NONE OR LIMITED NEED FOR WATCHES, WARNINGS, OR ADVISORIES.
YELLOW: A FEW WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.
RED: NUMEROUS WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

89/83/97









000
FXUS66 KPDT 241540
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
840 AM PDT THU APR 24 2014

.UPDATE...CURRENT FORECAST REMAINS ON TRACK WITH SOME MINOR
ADJUSTMENTS.  HAVE EXPANDED THE SLIGHT CHANCE THUNDER COVERAGE OVER
THE YAKIMA AND KITTITAS VALLEY FOR THE AFTERNOON PERIOD.  850-500MB
TEMPERATURE CHANGE INDICATES GREATER THAN 30 DEGREES CELSIUS.
ALTHOUGH DRIER AIR IS EXPECTED TO INTRUDE...THE POTENTIAL STILL
EXISTS FOR ISOLATED SHOWERS...AND THUS THUNDER CANT BE RULED OUT OF
THESE SHOWERS.  THE THUNDERSTORMS EXPECTED TODAY COULD PRODUCE GUSTY
WINDS AND SMALL HAIL. WEBER

&&

.PREV DISC... /ISSUED 655 AM PDT THU APR 24 2014/

SHORT TERM...TODAY THROUGH SATURDAY AFTERNOON...UPPER LEVEL TROUGH
DIGGING SOUTH OFFSHORE WILL BACK FLOW ALOFT TO SOUTH TODAY JUST
AHEAD OF A COLD FRONT. AIR MASS WILL BECOME UNSTABLE BY LATE THIS
MORNING. NEW 06Z NAM12 MOS GUIDANCE SHOWS 30-60 PERCENT CHANCE OF
THUNDERSTORMS AT HERMISTON, PENDLETON, WALLA WALLA, MEACHAM AND AT
LA GRANDE FROM 11AM THIS MORNING THROUGH THIS AFTERNOON. AS SUCH I
AMENDED THE WEATHER GRID FOR THIS AFTERNOON TO INDICATE THAT THERE
IS A CHANCE OF THUNDERSTORMS ALONG THE FOOTHILLS OF THE BLUE
MOUNTAINS EASTWARD THROUGH WALLOWA COUNTY AS WELL AS IN CROOK,
WHEELER, AND GRANT COUNTIES. MODELS ALSO SHOW A VORTICITY MAX MOVING
ACROSS FORECAST ARE TODAY, WHICH WILL PROVIDE GOOD DYNAMIC LIFT. IN
ADDITION, A COLD FRONT WILL MOVE THROUGH THE FORECAST AREA THIS
AFTERNOON AND ACT AS A TRIGGER FOR THUNDERSTORM DEVELOPMENT IN
EASTERN OREGON AND SOUTHEAST WASHINGTON. SCATTERED SHOWERS EXPECTED
TONIGHT AND FRIDAY WITH A SLIGHT CHANCE OF THUNDERSTORMS FRIDAY
AFTERNOON OVER THE BLUE MOUNTAINS. FRIDAY LOOKS TO BE DRY DUE TO
HIGH PRESSURE.  POLAN

LONG TERM...SATURDAY NIGHT THROUGH THURSDAY...SATURDAY NIGHT WILL
SEE AN UPPER LEVEL TROUGH MOVING OFF TO THE EAST WHILE ANOTHER
SYSTEM IN A MOIST AND PROGRESSIVE WESTERLY FLOW WILL BE MOVING INTO
THE AREA. THIS WILL GIVE US A CHANCE OF RAIN WITH THE MOUNTAINS
HAVING A RAIN/SNOW MIX SATURDAY NIGHT THROUGH SUNDAY. THE MOISTURE
WILL BEGIN TO TAPER OFF SUNDAY NIGHT WITH JUST A SLIGHT CHANCE OF
RAIN IN THE LOWER ELEVATIONS AND A CHANCE OF RAIN AND SNOW SHOWERS
IN THE MOUNTAINS ABOVE 4500 FEET. MONDAY WILL SEE RIDGING BUILDING
OVER THE AREA AND THE LOWER ELEVATIONS WILL BE DRY WHILE A SLIGHT
CHANCE OF RAIN AND SNOW SHOWERS WILL CONTINUE IN THE MOUNTAINS.
MODELS ARE IN AGREEMENT IN HAVING THE RIDGE REMAIN OVER THE AREA
THROUGH AT LEAST WEDNESDAY NIGHT WHICH WILL GIVE US A PERIOD OF DRY
WEATHER AND A WARMING TREND. THE GFS WANTS TO BRING AN UPPER LOW TO
THE CANADIAN BORDER AREA, POSSIBLY ON THURSDAY, THOUGH THE TIMING
CHANGES ON EACH OF THE LAST COUPLE OF RUNS WHILE THE ECMWF DOES NOT
HAVE THIS FEATURE. IF THIS SYSTEM PROVES TO BE REAL, THE GFS IS
USUALLY TOO FAST BRING THEM IN THIS FAR OUT IN THE LONG TERM PERIOD
SO HAVE KEPT THE FORECAST DRY THOUGH POPS WERE RAISED TO AROUND 10
PERCENT IN THE WASHINGTON CASCADES. HIGHS WILL BE IN THE MID 50S TO
MID 60S WITH MID 40S TO MID 50S IN THE MOUNTAINS SUNDAY AND MONDAY
THEN RISE TO THE 70S WITH 60S IN THE MOUNTAINS TUESDAY THROUGH
THURSDAY. PERRY

AVIATION...12Z TAFS...AN UPPER LEVEL TROUGH WILL SEND MOIST AIR
INTO THE AREA ON A SOUTHWEST FLOW TODAY. THIS WILL CREATE ENOUGH
INSTABILITY FOR SHOWERS THROUGH THE DAY THOUGH THERE MAY BE A LULL
FROM 15Z TO 18Z. ADDITIONALLY THE INSTABILITY MAY GENERATE ISOLATED
THUNDERSTORMS OVER MUCH OF THE AREA FROM 18Z TO 00Z AND LINGER ON
THROUGH 03Z FROM THE BLUE MOUNTAINS EASTWARD. HAVE ADDED VCTS AND A
CB LAYER FOR KPDT, KALW AND KPSC WHERE THUNDER IS LIKELIEST. SHOWERS
WILL END BY 03Z THOUGH ANOTHER DISTURBANCE WILL BEGIN ENTERING THE
AREA FROM THE SOUTH AFTER 06Z AND KRDM AND KBDN MAY SEE A MIX OF
RAIN AND SNOW SHOWERS THROUGH 12Z. SURFACE WINDS ARE ALREADY
INCREASING EARLY THIS MORNING AND ALL TAF SITES WILL HAVE WINDS OF
15 TO 25 KTS WITH GUSTS TO 35 KTS FROM 18Z TO 02Z. WINDS WILL
DECREASE TO 15 KTS OR LESS AFTER 05Z. PERRY

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  61  39  57  38 / 100  60  60  20
ALW  61  42  58  42 / 100  60  70  30
PSC  66  43  63  41 /  70  20  20  10
YKM  60  35  60  36 /  30  10  20  10
HRI  64  42  61  39 /  60  40  40  20
ELN  59  36  59  35 /  40  10  20  10
RDM  56  30  49  27 /  60  60  60  20
LGD  56  36  52  35 / 100  70  80  50
GCD  54  34  46  30 /  80  70  90  40
DLS  60  40  60  40 /  80  40  40  30

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...NONE.
WA...NONE.
&&

THREAT INDEX
TODAY : YELLOW
FRIDAY : GREEN
SATURDAY : GREEN

GREEN: NONE OR LIMITED NEED FOR WATCHES, WARNINGS, OR ADVISORIES.
YELLOW: A FEW WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.
RED: NUMEROUS WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

89/83/97










000
FXUS66 KPDT 241355 AAB
AFDPDT

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE PENDLETON OR
655 AM PDT THU APR 24 2014

UPDATED SHORT TERM DISCUSSION

.SHORT TERM...TODAY THROUGH SATURDAY AFTERNOON...UPPER LEVEL TROUGH
DIGGING SOUTH OFFSHORE WILL BACK FLOW ALOFT TO SOUTH TODAY JUST
AHEAD OF A COLD FRONT. AIR MASS WILL BECOME UNSTABLE BY LATE THIS
MORNING. NEW 06Z NAM12 MOS GUIDANCE SHOWS 30-60 PERCENT CHANCE OF
THUNDERSTORMS AT HERMISTON, PENDLETON, WALLA WALLA, MEACHAM AND AT
LA GRANDE FROM 11AM THIS MORNING THROUGH THIS AFTERNOON. AS SUCH I
AMENDED THE WEATHER GRID FOR THIS AFTERNOON TO INDICATE THAT THERE
IS A CHANCE OF THUNDERSTORMS ALONG THE FOOTHILLS OF THE BLUE
MOUNTAINS EASTWARD THROUGH WALLOWA COUNTY AS WELL AS IN CROOK,
WHEELER, AND GRANT COUNTIES. MODELS ALSO SHOW A VORTICITY MAX MOVING
ACROSS FORECAST ARE TODAY, WHICH WILL PROVIDE GOOD DYNAMIC LIFT. IN
ADDITION, A COLD FRONT WILL MOVE THROUGH THE FORECAST AREA THIS
AFTERNOON AND ACT AS A TRIGGER FOR THUNDERSTORM DEVELOPMENT IN
EASTERN OREGON AND SOUTHEAST WASHINGTON. SCATTERED SHOWERS EXPECTED
TONIGHT AND FRIDAY WITH A SLIGHT CHANCE OF THUNDERSTORMS FRIDAY
AFTERNOON OVER THE BLUE MOUNTAINS. FRIDAY LOOKS TO BE DRY DUE TO
HIGH PRESSURE.  POLAN

.LONG TERM...SATURDAY NIGHT THROUGH THURSDAY...SATURDAY NIGHT WILL
SEE AN UPPER LEVEL TROUGH MOVING OFF TO THE EAST WHILE ANOTHER
SYSTEM IN A MOIST AND PROGRESSIVE WESTERLY FLOW WILL BE MOVING INTO
THE AREA. THIS WILL GIVE US A CHANCE OF RAIN WITH THE MOUNTAINS
HAVING A RAIN/SNOW MIX SATURDAY NIGHT THROUGH SUNDAY. THE MOISTURE
WILL BEGIN TO TAPER OFF SUNDAY NIGHT WITH JUST A SLIGHT CHANCE OF
RAIN IN THE LOWER ELEVATIONS AND A CHANCE OF RAIN AND SNOW SHOWERS
IN THE MOUNTAINS ABOVE 4500 FEET. MONDAY WILL SEE RIDGING BUILDING
OVER THE AREA AND THE LOWER ELEVATIONS WILL BE DRY WHILE A SLIGHT
CHANCE OF RAIN AND SNOW SHOWERS WILL CONTINUE IN THE MOUNTAINS.
MODELS ARE IN AGREEMENT IN HAVING THE RIDGE REMAIN OVER THE AREA
THROUGH AT LEAST WEDNESDAY NIGHT WHICH WILL GIVE US A PERIOD OF DRY
WEATHER AND A WARMING TREND. THE GFS WANTS TO BRING AN UPPER LOW TO
THE CANADIAN BORDER AREA, POSSIBLY ON THURSDAY, THOUGH THE TIMING
CHANGES ON EACH OF THE LAST COUPLE OF RUNS WHILE THE ECMWF DOES NOT
HAVE THIS FEATURE. IF THIS SYSTEM PROVES TO BE REAL, THE GFS IS
USUALLY TOO FAST BRING THEM IN THIS FAR OUT IN THE LONG TERM PERIOD
SO HAVE KEPT THE FORECAST DRY THOUGH POPS WERE RAISED TO AROUND 10
PERCENT IN THE WASHINGTON CASCADES. HIGHS WILL BE IN THE MID 50S TO
MID 60S WITH MID 40S TO MID 50S IN THE MOUNTAINS SUNDAY AND MONDAY
THEN RISE TO THE 70S WITH 60S IN THE MOUNTAINS TUESDAY THROUGH
THURSDAY. PERRY

&&

.AVIATION...12Z TAFS...AN UPPER LEVEL TROUGH WILL SEND MOIST AIR
INTO THE AREA ON A SOUTHWEST FLOW TODAY. THIS WILL CREATE ENOUGH
INSTABILITY FOR SHOWERS THROUGH THE DAY THOUGH THERE MAY BE A LULL
FROM 15Z TO 18Z. ADDITIONALLY THE INSTABILITY MAY GENERATE ISOLATED
THUNDERSTORMS OVER MUCH OF THE AREA FROM 18Z TO 00Z AND LINGER ON
THROUGH 03Z FROM THE BLUE MOUNTAINS EASTWARD. HAVE ADDED VCTS AND A
CB LAYER FOR KPDT, KALW AND KPSC WHERE THUNDER IS LIKELIEST. SHOWERS
WILL END BY 03Z THOUGH ANOTHER DISTURBANCE WILL BEGIN ENTERING THE
AREA FROM THE SOUTH AFTER 06Z AND KRDM AND KBDN MAY SEE A MIX OF
RAIN AND SNOW SHOWERS THROUGH 12Z. SURFACE WINDS ARE ALREADY
INCREASING EARLY THIS MORNING AND ALL TAF SITES WILL HAVE WINDS OF
15 TO 25 KTS WITH GUSTS TO 35 KTS FROM 18Z TO 02Z. WINDS WILL
DECREASE TO 15 KTS OR LESS AFTER 05Z. PERRY

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  58  39  57  38 /  80  60  60  20
ALW  58  42  58  42 /  90  60  70  30
PSC  64  43  63  41 /  60  20  20  10
YKM  59  35  60  36 /  50  10  20  10
HRI  62  42  61  39 /  60  40  40  20
ELN  57  36  59  35 /  60  10  20  10
RDM  55  30  49  27 /  50  60  60  20
LGD  53  36  52  35 /  80  70  80  50
GCD  54  34  46  30 /  80  70  90  40
DLS  60  40  60  40 /  60  40  40  30

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...NONE.
WA...NONE.
&&

THREAT INDEX
TODAY : GREEN
FRIDAY : GREEN
SATURDAY : GREEN

GREEN: NONE OR LIMITED NEED FOR WATCHES, WARNINGS, OR ADVISORIES.
YELLOW: A FEW WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.
RED: NUMEROUS WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

99/83/83








000
FXUS66 KPDT 241355 AAB
AFDPDT

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE PENDLETON OR
655 AM PDT THU APR 24 2014

UPDATED SHORT TERM DISCUSSION

.SHORT TERM...TODAY THROUGH SATURDAY AFTERNOON...UPPER LEVEL TROUGH
DIGGING SOUTH OFFSHORE WILL BACK FLOW ALOFT TO SOUTH TODAY JUST
AHEAD OF A COLD FRONT. AIR MASS WILL BECOME UNSTABLE BY LATE THIS
MORNING. NEW 06Z NAM12 MOS GUIDANCE SHOWS 30-60 PERCENT CHANCE OF
THUNDERSTORMS AT HERMISTON, PENDLETON, WALLA WALLA, MEACHAM AND AT
LA GRANDE FROM 11AM THIS MORNING THROUGH THIS AFTERNOON. AS SUCH I
AMENDED THE WEATHER GRID FOR THIS AFTERNOON TO INDICATE THAT THERE
IS A CHANCE OF THUNDERSTORMS ALONG THE FOOTHILLS OF THE BLUE
MOUNTAINS EASTWARD THROUGH WALLOWA COUNTY AS WELL AS IN CROOK,
WHEELER, AND GRANT COUNTIES. MODELS ALSO SHOW A VORTICITY MAX MOVING
ACROSS FORECAST ARE TODAY, WHICH WILL PROVIDE GOOD DYNAMIC LIFT. IN
ADDITION, A COLD FRONT WILL MOVE THROUGH THE FORECAST AREA THIS
AFTERNOON AND ACT AS A TRIGGER FOR THUNDERSTORM DEVELOPMENT IN
EASTERN OREGON AND SOUTHEAST WASHINGTON. SCATTERED SHOWERS EXPECTED
TONIGHT AND FRIDAY WITH A SLIGHT CHANCE OF THUNDERSTORMS FRIDAY
AFTERNOON OVER THE BLUE MOUNTAINS. FRIDAY LOOKS TO BE DRY DUE TO
HIGH PRESSURE.  POLAN

.LONG TERM...SATURDAY NIGHT THROUGH THURSDAY...SATURDAY NIGHT WILL
SEE AN UPPER LEVEL TROUGH MOVING OFF TO THE EAST WHILE ANOTHER
SYSTEM IN A MOIST AND PROGRESSIVE WESTERLY FLOW WILL BE MOVING INTO
THE AREA. THIS WILL GIVE US A CHANCE OF RAIN WITH THE MOUNTAINS
HAVING A RAIN/SNOW MIX SATURDAY NIGHT THROUGH SUNDAY. THE MOISTURE
WILL BEGIN TO TAPER OFF SUNDAY NIGHT WITH JUST A SLIGHT CHANCE OF
RAIN IN THE LOWER ELEVATIONS AND A CHANCE OF RAIN AND SNOW SHOWERS
IN THE MOUNTAINS ABOVE 4500 FEET. MONDAY WILL SEE RIDGING BUILDING
OVER THE AREA AND THE LOWER ELEVATIONS WILL BE DRY WHILE A SLIGHT
CHANCE OF RAIN AND SNOW SHOWERS WILL CONTINUE IN THE MOUNTAINS.
MODELS ARE IN AGREEMENT IN HAVING THE RIDGE REMAIN OVER THE AREA
THROUGH AT LEAST WEDNESDAY NIGHT WHICH WILL GIVE US A PERIOD OF DRY
WEATHER AND A WARMING TREND. THE GFS WANTS TO BRING AN UPPER LOW TO
THE CANADIAN BORDER AREA, POSSIBLY ON THURSDAY, THOUGH THE TIMING
CHANGES ON EACH OF THE LAST COUPLE OF RUNS WHILE THE ECMWF DOES NOT
HAVE THIS FEATURE. IF THIS SYSTEM PROVES TO BE REAL, THE GFS IS
USUALLY TOO FAST BRING THEM IN THIS FAR OUT IN THE LONG TERM PERIOD
SO HAVE KEPT THE FORECAST DRY THOUGH POPS WERE RAISED TO AROUND 10
PERCENT IN THE WASHINGTON CASCADES. HIGHS WILL BE IN THE MID 50S TO
MID 60S WITH MID 40S TO MID 50S IN THE MOUNTAINS SUNDAY AND MONDAY
THEN RISE TO THE 70S WITH 60S IN THE MOUNTAINS TUESDAY THROUGH
THURSDAY. PERRY

&&

.AVIATION...12Z TAFS...AN UPPER LEVEL TROUGH WILL SEND MOIST AIR
INTO THE AREA ON A SOUTHWEST FLOW TODAY. THIS WILL CREATE ENOUGH
INSTABILITY FOR SHOWERS THROUGH THE DAY THOUGH THERE MAY BE A LULL
FROM 15Z TO 18Z. ADDITIONALLY THE INSTABILITY MAY GENERATE ISOLATED
THUNDERSTORMS OVER MUCH OF THE AREA FROM 18Z TO 00Z AND LINGER ON
THROUGH 03Z FROM THE BLUE MOUNTAINS EASTWARD. HAVE ADDED VCTS AND A
CB LAYER FOR KPDT, KALW AND KPSC WHERE THUNDER IS LIKELIEST. SHOWERS
WILL END BY 03Z THOUGH ANOTHER DISTURBANCE WILL BEGIN ENTERING THE
AREA FROM THE SOUTH AFTER 06Z AND KRDM AND KBDN MAY SEE A MIX OF
RAIN AND SNOW SHOWERS THROUGH 12Z. SURFACE WINDS ARE ALREADY
INCREASING EARLY THIS MORNING AND ALL TAF SITES WILL HAVE WINDS OF
15 TO 25 KTS WITH GUSTS TO 35 KTS FROM 18Z TO 02Z. WINDS WILL
DECREASE TO 15 KTS OR LESS AFTER 05Z. PERRY

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  58  39  57  38 /  80  60  60  20
ALW  58  42  58  42 /  90  60  70  30
PSC  64  43  63  41 /  60  20  20  10
YKM  59  35  60  36 /  50  10  20  10
HRI  62  42  61  39 /  60  40  40  20
ELN  57  36  59  35 /  60  10  20  10
RDM  55  30  49  27 /  50  60  60  20
LGD  53  36  52  35 /  80  70  80  50
GCD  54  34  46  30 /  80  70  90  40
DLS  60  40  60  40 /  60  40  40  30

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...NONE.
WA...NONE.
&&

THREAT INDEX
TODAY : GREEN
FRIDAY : GREEN
SATURDAY : GREEN

GREEN: NONE OR LIMITED NEED FOR WATCHES, WARNINGS, OR ADVISORIES.
YELLOW: A FEW WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.
RED: NUMEROUS WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

99/83/83







000
FXUS66 KPDT 241200 AAA
AFDPDT

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE PENDLETON OR
500 AM PDT THU APR 24 2014

UPDATED AVIATION DISCUSSION

.SHORT TERM...TODAY THROUGH SATURDAY AFTERNOON...UPPER LEVEL TROUGH
DIGGING SOUTH OFFSHORE WILL BACK FLOW ALOFT TO SOUTH TODAY JUST
AHEAD OF A COLD FRONT. AIR MASS WILL BECOME UNSTABLE BY LATE THIS
MORNING SO THERE IS A SLIGHT CHANCE OF THUNDERSTORMS THIS AFTERNOON
AND THIS EVENING. A COLD FRONT WILL MOVE THROUGH THE FORECAST AREA
THIS AFTERNOON AND ACT AS A TRIGGER FOR ISOLATED THUNDERSTORMS IN
THE EASTERN OREGON AND SOUTHEAST WASHINGTON. ALSO A SLIGHT CHANCE OF
AFTERNOON THUNDERSTORMS OVER BLUE MOUNTAINS FRIDAY AFTERNOON ALONG
WITH A CHANCE OF SHOWERS. FRIDAY LOOKS TO BE DRY DUE TO HIGH
PRESSURE.  POLAN

.LONG TERM...SATURDAY NIGHT THROUGH THURSDAY...SATURDAY NIGHT WILL
SEE AN UPPER LEVEL TROUGH MOVING OFF TO THE EAST WHILE ANOTHER
SYSTEM IN A MOIST AND PROGRESSIVE WESTERLY FLOW WILL BE MOVING INTO
THE AREA. THIS WILL GIVE US A CHANCE OF RAIN WITH THE MOUNTAINS
HAVING A RAIN/SNOW MIX SATURDAY NIGHT THROUGH SUNDAY. THE MOISTURE
WILL BEGIN TO TAPER OFF SUNDAY NIGHT WITH JUST A SLIGHT CHANCE OF
RAIN IN THE LOWER ELEVATIONS AND A CHANCE OF RAIN AND SNOW SHOWERS
IN THE MOUNTAINS ABOVE 4500 FEET. MONDAY WILL SEE RIDGING BUILDING
OVER THE AREA AND THE LOWER ELEVATIONS WILL BE DRY WHILE A SLIGHT
CHANCE OF RAIN AND SNOW SHOWERS WILL CONTINUE IN THE MOUNTAINS.
MODELS ARE IN AGREEMENT IN HAVING THE RIDGE REMAIN OVER THE AREA
THROUGH AT LEAST WEDNESDAY NIGHT WHICH WILL GIVE US A PERIOD OF DRY
WEATHER AND A WARMING TREND. THE GFS WANTS TO BRING AN UPPER LOW TO
THE CANADIAN BORDER AREA, POSSIBLY ON THURSDAY, THOUGH THE TIMING
CHANGES ON EACH OF THE LAST COUPLE OF RUNS WHILE THE ECMWF DOES NOT
HAVE THIS FEATURE. IF THIS SYSTEM PROVES TO BE REAL, THE GFS IS
USUALLY TOO FAST BRING THEM IN THIS FAR OUT IN THE LONG TERM PERIOD
SO HAVE KEPT THE FORECAST DRY THOUGH POPS WERE RAISED TO AROUND 10
PERCENT IN THE WASHINGTON CASCADES. HIGHS WILL BE IN THE MID 50S TO
MID 60S WITH MID 40S TO MID 50S IN THE MOUNTAINS SUNDAY AND MONDAY
THEN RISE TO THE 70S WITH 60S IN THE MOUNTAINS TUESDAY THROUGH
THURSDAY. PERRY

&&

.AVIATION...12Z TAFS...AN UPPER LEVEL TROUGH WILL SEND MOIST AIR
INTO THE AREA ON A SOUTHWEST FLOW TODAY. THIS WILL CREATE ENOUGH
INSTABILITY FOR SHOWERS THROUGH THE DAY THOUGH THERE MAY BE A LULL
FROM 15Z TO 18Z. ADDITIONALLY THE INSTABILITY MAY GENERATE ISOLATED
THUNDERSTORMS OVER MUCH OF THE AREA FROM 18Z TO 00Z AND LINGER ON
THROUGH 03Z FROM THE BLUE MOUNTAINS EASTWARD. HAVE ADDED VCTS AND A
CB LAYER FOR KPDT, KALW AND KPSC WHERE THUNDER IS LIKELIEST. SHOWERS
WILL END BY 03Z THOUGH ANOTHER DISTURBANCE WILL BEGIN ENTERING THE
AREA FROM THE SOUTH AFTER 06Z AND KRDM AND KBDN MAY SEE A MIX OF
RAIN AND SNOW SHOWERS THROUGH 12Z. SURFACE WINDS ARE ALREADY
INCREASING EARLY THIS MORNING AND ALL TAF SITES WILL HAVE WINDS OF
15 TO 25 KTS WITH GUSTS TO 35 KTS FROM 18Z TO 02Z. WINDS WILL
DECREASE TO 15 KTS OR LESS AFTER 05Z. PERRY

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  58  39  57  38 /  80  60  60  20
ALW  58  42  58  42 /  90  60  70  30
PSC  64  43  63  41 /  60  20  20  10
YKM  59  35  60  36 /  50  10  20  10
HRI  62  42  61  39 /  60  40  40  20
ELN  57  36  59  35 /  60  10  20  10
RDM  55  30  49  27 /  50  60  60  20
LGD  53  36  52  35 /  80  70  80  50
GCD  54  34  46  30 /  80  70  90  40
DLS  60  40  60  40 /  60  40  40  30

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...NONE.
WA...NONE.
&&

THREAT INDEX
TODAY : GREEN
FRIDAY : GREEN
SATURDAY : GREEN

GREEN: NONE OR LIMITED NEED FOR WATCHES, WARNINGS, OR ADVISORIES.
YELLOW: A FEW WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.
RED: NUMEROUS WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

99/83/83








000
FXUS66 KPDT 241200 AAA
AFDPDT

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE PENDLETON OR
500 AM PDT THU APR 24 2014

UPDATED AVIATION DISCUSSION

.SHORT TERM...TODAY THROUGH SATURDAY AFTERNOON...UPPER LEVEL TROUGH
DIGGING SOUTH OFFSHORE WILL BACK FLOW ALOFT TO SOUTH TODAY JUST
AHEAD OF A COLD FRONT. AIR MASS WILL BECOME UNSTABLE BY LATE THIS
MORNING SO THERE IS A SLIGHT CHANCE OF THUNDERSTORMS THIS AFTERNOON
AND THIS EVENING. A COLD FRONT WILL MOVE THROUGH THE FORECAST AREA
THIS AFTERNOON AND ACT AS A TRIGGER FOR ISOLATED THUNDERSTORMS IN
THE EASTERN OREGON AND SOUTHEAST WASHINGTON. ALSO A SLIGHT CHANCE OF
AFTERNOON THUNDERSTORMS OVER BLUE MOUNTAINS FRIDAY AFTERNOON ALONG
WITH A CHANCE OF SHOWERS. FRIDAY LOOKS TO BE DRY DUE TO HIGH
PRESSURE.  POLAN

.LONG TERM...SATURDAY NIGHT THROUGH THURSDAY...SATURDAY NIGHT WILL
SEE AN UPPER LEVEL TROUGH MOVING OFF TO THE EAST WHILE ANOTHER
SYSTEM IN A MOIST AND PROGRESSIVE WESTERLY FLOW WILL BE MOVING INTO
THE AREA. THIS WILL GIVE US A CHANCE OF RAIN WITH THE MOUNTAINS
HAVING A RAIN/SNOW MIX SATURDAY NIGHT THROUGH SUNDAY. THE MOISTURE
WILL BEGIN TO TAPER OFF SUNDAY NIGHT WITH JUST A SLIGHT CHANCE OF
RAIN IN THE LOWER ELEVATIONS AND A CHANCE OF RAIN AND SNOW SHOWERS
IN THE MOUNTAINS ABOVE 4500 FEET. MONDAY WILL SEE RIDGING BUILDING
OVER THE AREA AND THE LOWER ELEVATIONS WILL BE DRY WHILE A SLIGHT
CHANCE OF RAIN AND SNOW SHOWERS WILL CONTINUE IN THE MOUNTAINS.
MODELS ARE IN AGREEMENT IN HAVING THE RIDGE REMAIN OVER THE AREA
THROUGH AT LEAST WEDNESDAY NIGHT WHICH WILL GIVE US A PERIOD OF DRY
WEATHER AND A WARMING TREND. THE GFS WANTS TO BRING AN UPPER LOW TO
THE CANADIAN BORDER AREA, POSSIBLY ON THURSDAY, THOUGH THE TIMING
CHANGES ON EACH OF THE LAST COUPLE OF RUNS WHILE THE ECMWF DOES NOT
HAVE THIS FEATURE. IF THIS SYSTEM PROVES TO BE REAL, THE GFS IS
USUALLY TOO FAST BRING THEM IN THIS FAR OUT IN THE LONG TERM PERIOD
SO HAVE KEPT THE FORECAST DRY THOUGH POPS WERE RAISED TO AROUND 10
PERCENT IN THE WASHINGTON CASCADES. HIGHS WILL BE IN THE MID 50S TO
MID 60S WITH MID 40S TO MID 50S IN THE MOUNTAINS SUNDAY AND MONDAY
THEN RISE TO THE 70S WITH 60S IN THE MOUNTAINS TUESDAY THROUGH
THURSDAY. PERRY

&&

.AVIATION...12Z TAFS...AN UPPER LEVEL TROUGH WILL SEND MOIST AIR
INTO THE AREA ON A SOUTHWEST FLOW TODAY. THIS WILL CREATE ENOUGH
INSTABILITY FOR SHOWERS THROUGH THE DAY THOUGH THERE MAY BE A LULL
FROM 15Z TO 18Z. ADDITIONALLY THE INSTABILITY MAY GENERATE ISOLATED
THUNDERSTORMS OVER MUCH OF THE AREA FROM 18Z TO 00Z AND LINGER ON
THROUGH 03Z FROM THE BLUE MOUNTAINS EASTWARD. HAVE ADDED VCTS AND A
CB LAYER FOR KPDT, KALW AND KPSC WHERE THUNDER IS LIKELIEST. SHOWERS
WILL END BY 03Z THOUGH ANOTHER DISTURBANCE WILL BEGIN ENTERING THE
AREA FROM THE SOUTH AFTER 06Z AND KRDM AND KBDN MAY SEE A MIX OF
RAIN AND SNOW SHOWERS THROUGH 12Z. SURFACE WINDS ARE ALREADY
INCREASING EARLY THIS MORNING AND ALL TAF SITES WILL HAVE WINDS OF
15 TO 25 KTS WITH GUSTS TO 35 KTS FROM 18Z TO 02Z. WINDS WILL
DECREASE TO 15 KTS OR LESS AFTER 05Z. PERRY

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  58  39  57  38 /  80  60  60  20
ALW  58  42  58  42 /  90  60  70  30
PSC  64  43  63  41 /  60  20  20  10
YKM  59  35  60  36 /  50  10  20  10
HRI  62  42  61  39 /  60  40  40  20
ELN  57  36  59  35 /  60  10  20  10
RDM  55  30  49  27 /  50  60  60  20
LGD  53  36  52  35 /  80  70  80  50
GCD  54  34  46  30 /  80  70  90  40
DLS  60  40  60  40 /  60  40  40  30

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...NONE.
WA...NONE.
&&

THREAT INDEX
TODAY : GREEN
FRIDAY : GREEN
SATURDAY : GREEN

GREEN: NONE OR LIMITED NEED FOR WATCHES, WARNINGS, OR ADVISORIES.
YELLOW: A FEW WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.
RED: NUMEROUS WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

99/83/83







000
FXUS66 KPDT 241001
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
300 AM PDT THU APR 24 2014

.SHORT TERM...TODAY THROUGH SATURDAY AFTERNOON...UPPER LEVEL TROUGH
DIGGING SOUTH OFFSHORE WILL BACK FLOW ALOFT TO SOUTH TODAY JUST
AHEAD OF A COLD FRONT. AIR MASS WILL BECOME UNSTABLE BY LATE THIS
MORNING SO THERE IS A SLIGHT CHANCE OF THUNDERSTORMS THIS AFTERNOON
AND THIS EVENING. A COLD FRONT WILL MOVE THROUGH THE FORECAST AREA
THIS AFTERNOON AND ACT AS A TRIGGER FOR ISOLATED THUNDERSTORMS IN
THE EASTERN OREGON AND SOUTHEAST WASHINGTON. ALSO A SLIGHT CHANCE OF
AFTERNOON THUNDERSTORMS OVER BLUE MOUNTAINS FRIDAY AFTERNOON ALONG
WITH A CHANCE OF SHOWERS. FRIDAY LOOKS TO BE DRY DUR TO HIGH
PRESSURE.  POLAN

.LONG TERM...SATURDAY NIGHT THROUGH THURSDAY...SATURDAY NIGHT WILL
SEE AN UPPER LEVEL TROUGH MOVING OFF TO THE EAST WHILE ANOTHER
SYSTEM IN A MOIST AND PROGRESSIVE WESTERLY FLOW WILL BE MOVING INTO
THE AREA. THIS WILL GIVE US A CHANCE OF RAIN WITH THE MOUNTAINS
HAVING A RAIN/SNOW MIX SATURDAY NIGHT THROUGH SUNDAY. THE MOISTURE
WILL BEGIN TO TAPER OFF SUNDAY NIGHT WITH JUST A SLIGHT CHANCE OF
RAIN IN THE LOWER ELEVATIONS AND A CHANCE OF RAIN AND SNOW SHOWERS
IN THE MOUNTAINS ABOVE 4500 FEET. MONDAY WILL SEE RIDGING BUILDING
OVER THE AREA AND THE LOWER ELEVATIONS WILL BE DRY WHILE A SLIGHT
CHANCE OF RAIN AND SNOW SHOWERS WILL CONTINUE IN THE MOUNTAINS.
MODELS ARE IN AGREEMENT IN HAVING THE RIDGE REMAIN OVER THE AREA
THROUGH AT LEAST WEDNESDAY NIGHT WHICH WILL GIVE US A PERIOD OF DRY
WEATHER AND A WARMING TREND. THE GFS WANTS TO BRING AN UPPER LOW TO
THE CANADIAN BORDER AREA, POSSIBLY ON THURSDAY, THOUGH THE TIMING
CHANGES ON EACH OF THE LAST COUPLE OF RUNS WHILE THE ECMWF DOES NOT
HAVE THIS FEATURE. IF THIS SYSTEM PROVES TO BE REAL, THE GFS IS
USUALLY TOO FAST BRING THEM IN THIS FAR OUT IN THE LONG TERM PERIOD
SO HAVE KEPT THE FORECAST DRY THOUGH POPS WERE RAISED TO AROUND 10
PERCENT IN THE WASHINGTON CASCADES. HIGHS WILL BE IN THE MID 50S TO
MID 60S WITH MID 40S TO MID 50S IN THE MOUNTAINS SUNDAY AND MONDAY
THEN RISE TO THE 70S WITH 60S IN THE MOUNTAINS TUESDAY THROUGH
THURSDAY. PERRY

&&

.AVIATION...PREVIOUS DISCUSSION...06Z TAFS...THERE MAY BE BRIEF
PERIODS OF MVFR AND POSSIBLY EVEN IFR CONDITIONS TONIGHT DUE TO
LOWERED CIGS AND SHOWERS REDUCING VISIBILITY. HOWEVER MOST OF THE
TIME VFR CONDITIONS WILL PREVAIL. WINDS WILL RANGE FROM 5 TO 15 KTS
OVERNIGHT AND THEN WILL INCREASE TO 10 TO 20 KTS WITH LOCALLY 15 TO
25 KTS ON THURSDAY AS A COLD FRONT MOVES ACROSS THE CWA AND MIXES
DOWN STRONGER WINDS FROM ALOFT WITH CONVECTIVE RAIN SHOWERS AND
POSSIBLY EVEN THUNDERSTORMS. THE THUNDERSTORM THREAT WILL PRIMARILY
BE AT KPDT AND KALW. 88

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  58  39  57  38 /  80  60  60  20
ALW  58  42  58  42 /  90  60  70  30
PSC  64  43  63  41 /  60  20  20  10
YKM  59  35  60  36 /  50  10  20  10
HRI  62  42  61  39 /  60  40  40  20
ELN  57  36  59  35 /  60  10  20  10
RDM  55  30  49  27 /  50  60  60  20
LGD  53  36  52  35 /  80  70  80  50
GCD  54  34  46  30 /  80  70  90  40
DLS  60  40  60  40 /  60  40  40  30

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...NONE.
WA...NONE.
&&

THREAT INDEX
TODAY : GREEN
FRIDAY : GREEN
SATURDAY : GREEN

GREEN: NONE OR LIMITED NEED FOR WATCHES, WARNINGS, OR ADVISORIES.
YELLOW: A FEW WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.
RED: NUMEROUS WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

99/83/83









000
FXUS66 KPDT 241001
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
300 AM PDT THU APR 24 2014

.SHORT TERM...TODAY THROUGH SATURDAY AFTERNOON...UPPER LEVEL TROUGH
DIGGING SOUTH OFFSHORE WILL BACK FLOW ALOFT TO SOUTH TODAY JUST
AHEAD OF A COLD FRONT. AIR MASS WILL BECOME UNSTABLE BY LATE THIS
MORNING SO THERE IS A SLIGHT CHANCE OF THUNDERSTORMS THIS AFTERNOON
AND THIS EVENING. A COLD FRONT WILL MOVE THROUGH THE FORECAST AREA
THIS AFTERNOON AND ACT AS A TRIGGER FOR ISOLATED THUNDERSTORMS IN
THE EASTERN OREGON AND SOUTHEAST WASHINGTON. ALSO A SLIGHT CHANCE OF
AFTERNOON THUNDERSTORMS OVER BLUE MOUNTAINS FRIDAY AFTERNOON ALONG
WITH A CHANCE OF SHOWERS. FRIDAY LOOKS TO BE DRY DUR TO HIGH
PRESSURE.  POLAN

.LONG TERM...SATURDAY NIGHT THROUGH THURSDAY...SATURDAY NIGHT WILL
SEE AN UPPER LEVEL TROUGH MOVING OFF TO THE EAST WHILE ANOTHER
SYSTEM IN A MOIST AND PROGRESSIVE WESTERLY FLOW WILL BE MOVING INTO
THE AREA. THIS WILL GIVE US A CHANCE OF RAIN WITH THE MOUNTAINS
HAVING A RAIN/SNOW MIX SATURDAY NIGHT THROUGH SUNDAY. THE MOISTURE
WILL BEGIN TO TAPER OFF SUNDAY NIGHT WITH JUST A SLIGHT CHANCE OF
RAIN IN THE LOWER ELEVATIONS AND A CHANCE OF RAIN AND SNOW SHOWERS
IN THE MOUNTAINS ABOVE 4500 FEET. MONDAY WILL SEE RIDGING BUILDING
OVER THE AREA AND THE LOWER ELEVATIONS WILL BE DRY WHILE A SLIGHT
CHANCE OF RAIN AND SNOW SHOWERS WILL CONTINUE IN THE MOUNTAINS.
MODELS ARE IN AGREEMENT IN HAVING THE RIDGE REMAIN OVER THE AREA
THROUGH AT LEAST WEDNESDAY NIGHT WHICH WILL GIVE US A PERIOD OF DRY
WEATHER AND A WARMING TREND. THE GFS WANTS TO BRING AN UPPER LOW TO
THE CANADIAN BORDER AREA, POSSIBLY ON THURSDAY, THOUGH THE TIMING
CHANGES ON EACH OF THE LAST COUPLE OF RUNS WHILE THE ECMWF DOES NOT
HAVE THIS FEATURE. IF THIS SYSTEM PROVES TO BE REAL, THE GFS IS
USUALLY TOO FAST BRING THEM IN THIS FAR OUT IN THE LONG TERM PERIOD
SO HAVE KEPT THE FORECAST DRY THOUGH POPS WERE RAISED TO AROUND 10
PERCENT IN THE WASHINGTON CASCADES. HIGHS WILL BE IN THE MID 50S TO
MID 60S WITH MID 40S TO MID 50S IN THE MOUNTAINS SUNDAY AND MONDAY
THEN RISE TO THE 70S WITH 60S IN THE MOUNTAINS TUESDAY THROUGH
THURSDAY. PERRY

&&

.AVIATION...PREVIOUS DISCUSSION...06Z TAFS...THERE MAY BE BRIEF
PERIODS OF MVFR AND POSSIBLY EVEN IFR CONDITIONS TONIGHT DUE TO
LOWERED CIGS AND SHOWERS REDUCING VISIBILITY. HOWEVER MOST OF THE
TIME VFR CONDITIONS WILL PREVAIL. WINDS WILL RANGE FROM 5 TO 15 KTS
OVERNIGHT AND THEN WILL INCREASE TO 10 TO 20 KTS WITH LOCALLY 15 TO
25 KTS ON THURSDAY AS A COLD FRONT MOVES ACROSS THE CWA AND MIXES
DOWN STRONGER WINDS FROM ALOFT WITH CONVECTIVE RAIN SHOWERS AND
POSSIBLY EVEN THUNDERSTORMS. THE THUNDERSTORM THREAT WILL PRIMARILY
BE AT KPDT AND KALW. 88

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  58  39  57  38 /  80  60  60  20
ALW  58  42  58  42 /  90  60  70  30
PSC  64  43  63  41 /  60  20  20  10
YKM  59  35  60  36 /  50  10  20  10
HRI  62  42  61  39 /  60  40  40  20
ELN  57  36  59  35 /  60  10  20  10
RDM  55  30  49  27 /  50  60  60  20
LGD  53  36  52  35 /  80  70  80  50
GCD  54  34  46  30 /  80  70  90  40
DLS  60  40  60  40 /  60  40  40  30

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...NONE.
WA...NONE.
&&

THREAT INDEX
TODAY : GREEN
FRIDAY : GREEN
SATURDAY : GREEN

GREEN: NONE OR LIMITED NEED FOR WATCHES, WARNINGS, OR ADVISORIES.
YELLOW: A FEW WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.
RED: NUMEROUS WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

99/83/83










000
FXUS66 KPDT 240221
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
720 PM PDT WED APR 23 2014

.UPDATE...SHOWERS CONTINUE TO INCREASE OVER THE CWA FROM WEST TO
EAST AS THE NEXT WEATHER SYSTEM MOVES INTO THE REGION. A WARM FRONT
WILL MOVE UP ACROSS THE CWA THIS EVENING AND OVERNIGHT BRINGING RAIN
TO THE FORECAST AREA. SNOW LEVELS WILL BE HIGH...ABOVE 5000 FEET SO
SNOW WILL ONLY BE EXPECTED ON THE HIGHEST PEAKS. THE COLD FRONT WITH
THIS SYSTEM WILL MOVE ACROSS THE CWA ON THURSDAY. THE COLD FRONT
SHOULD BE EAST OF THE CASCADES BY 18Z AND TO THE IDAHO BORDER BY
00Z. THE ATMOSPHERE WILL BECOME MORE UNSTABLE ON THURSDAY WITH THE
COLDER MOVING IN ALOFT. AS SUCH THERE WILL ALSO BE A SLIGHT CHANCE
OF THUNDERSTORMS OVER THE EASTERN AND NORTHEAST MOUNTAINS IN THE
AFTERNOON. THESE THUNDERSTORMS ARE NOT EXPECTED TO BECOME SEVERE
THOUGH SOME COULD PRODUCE SMALL HAIL AND GUSTY WINDS. THE ACTIVE
WEATHER PATTERN WILL PERSIST WITH ANOTHER SYSTEM MOVING INTO THE CWA
ON FRIDAY AND AGAIN SATURDAY NIGHT INTO SUNDAY WITH MORE RAIN OR
RAIN SHOWERS. CURRENT FORECAST LOOKS TO BE ON TRACK. 88

&&

.AVIATION...THERE MAY BE BRIEF PERIODS OF MVFR AND POSSIBLY EVEN IFR
CONDITIONS TONIGHT DUE TO LOWERED CIGS AND SHOWERS REDUCING
VISIBILITY. HOWEVER MOST OF THE TIME VFR CONDITIONS WILL PREVAIL.
WINDS WILL RANGE FROM 5 TO 15 KTS OVERNIGHT AND THEN WILL INCREASE
TO 10 TO 20 KTS WITH LOCALLY 15 TO 25 KTS ON THURSDAY AS A COLD
FRONT MOVES ACROSS THE CWA AND MIXES DOWN STRONGER WINDS FROM ALOFT
WITH CONVECTIVE RAIN SHOWERS AND POSSIBLY EVEN THUNDERSTORMS. THE
THUNDERSTORM THREAT WILL PRIMARILY BE AT KPDT AND KALW. 88

&&

.PREV DISC... /ISSUED 225 PM PDT WED APR 23 2014/

SHORT TERM...TONIGHT THROUGH FRIDAY NIGHT. THE CHALLENGE WITH THIS
PACKAGE IS THE RAIN CHANCES ACROSS THE AREA. A STORM SYSTEM WILL
SPREAD ADDITIONAL CLOUDS AND SHOWERS TO THE REGION TONIGHT AND
THURSDAY AS A LOW PRESSURE SYSTEM APPROACHES THE PACNW COAST TOWARD
THE END OF THE WORK WEEK. THE ATMOSPHERE ALSO BECOMES INCREASINGLY
UNSTABLE THURSDAY AFTERNOON AND AN ISOLD TSRA IS POSSIBLE OVER THE
EASTERN ZONES. THE SYSTEM MOVES INTO WA/OR FRIDAY AND THE UNSETTLED
WEATHER WILL PERSIST INTO FRIDAY NIGHT. THE BEST CHANCES FOR PCPN
SHOULD OCCUR LATER TONIGHT AND THURSDAY BEFORE LESSENING INTO
THURSDAY NIGHT. HOWEVER THE CHANCES FOR SHOWERS WILL PERSIST
ESPECIALLY IN THE AREA MOUNTAINS. SNOW LEVELS SHOULD REMAIN ABOVE 4K
FEET DESPITE COOLER TEMPERATURES EXPECTED BY FRIDAY.

LONG TERM...SATURDAY THROUGH WEDNESDAY NIGHT...UPPER LEVEL TROUGH
OVER THE AREA WILL PUSH OFF TO THE EAST SATURDAY...WITH PROGRESSIVE
WESTERLY FLOW TO FOLLOW.  A BREAK IN THE MOISTURE SATURDAY INTO
SUNDAY...BUT STILL A CHANCE FOR SHOWERS OVER THE MOUNTAINS AND A
SLIGHT CHANCE ACROSS THE VALLEYS.  OVERALL...SNOW LEVELS WILL BE
3500-4500 FEET SATURDAY INTO SUNDAY...WITH SNOW LEVELS RISING MONDAY
ONWARD.  BY MONDAY NIGHT...A DRIER SOUTHWEST FLOW WILL SET IN AND
SNOW LEVELS ARE EXPECTED TO RISE BETWEEN 6500-7500 FEET.  AN UPPER
LEVEL RIDGE WILL BUILD OVER THE AREA FOR THE EXTENDED.  TEMPERATURES
WILL START OFF IN THE MID 60S ACROSS THE LOWER ELEVATIONS OVER THE
WEEKEND...AND SHOULD BE IN THE MID 70S BY TUESDAY AND WEDNESDAY.
THERE IS SOME DISCREPANCIES WITH MODEL CONSISTENCY AND CONTINUITY
AFTER TUESDAY.  GFS MODEL HAS A STRONG COLD FRONT TO PUSH THROUGH
THE AREA...WITH INCREASED CHANCES OF PRECIPITATION.  THUNDERSTORMS
CAN`T BE RULED OUT WITH THIS SCENARIO AS WELL.  HOWEVER...ECMWF
CONTINUES TO HOLD ONTO THE UPPER LEVEL RIDGE WITH CONTINUED WARM AND
DRY TEMPERATURES.  LEANING TOWARD THE ECMWF FOR THE
EXTENDED...THEREFORE THE CURRENT FORECAST REFLECTS DRIER AND
SLIGHTLY WARMER WEDNESDAY AFTERNOON AND EVENING.  NO THUNDER HAS
BEEN ADDED TO THE EXTENDED...AS CONFIDENCE IS NOT HIGH ENOUGH TO
MENTION.  WEBER

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  44  58  39  57 /  60  70  60  50
ALW  47  58  42  58 /  60  80  60  50
PSC  48  64  43  63 /  60  60  20  20
YKM  41  59  35  60 /  50  50  20  10
HRI  46  62  42  61 /  60  60  40  30
ELN  40  57  36  59 /  50  60  20  10
RDM  39  55  30  49 /  60  50  60  60
LGD  43  53  36  52 /  70  80  70  70
GCD  38  54  34  46 /  60  80  70  80
DLS  46  60  40  60 /  70  60  40  40

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...NONE.
WA...NONE.
&&

THREAT INDEX
THURSDAY : GREEN
FRIDAY : GREEN
SATURDAY : GREEN

GREEN: NONE OR LIMITED NEED FOR WATCHES, WARNINGS, OR ADVISORIES.
YELLOW: A FEW WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.
RED: NUMEROUS WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

88/89/88









000
FXUS66 KPDT 240221
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
720 PM PDT WED APR 23 2014

.UPDATE...SHOWERS CONTINUE TO INCREASE OVER THE CWA FROM WEST TO
EAST AS THE NEXT WEATHER SYSTEM MOVES INTO THE REGION. A WARM FRONT
WILL MOVE UP ACROSS THE CWA THIS EVENING AND OVERNIGHT BRINGING RAIN
TO THE FORECAST AREA. SNOW LEVELS WILL BE HIGH...ABOVE 5000 FEET SO
SNOW WILL ONLY BE EXPECTED ON THE HIGHEST PEAKS. THE COLD FRONT WITH
THIS SYSTEM WILL MOVE ACROSS THE CWA ON THURSDAY. THE COLD FRONT
SHOULD BE EAST OF THE CASCADES BY 18Z AND TO THE IDAHO BORDER BY
00Z. THE ATMOSPHERE WILL BECOME MORE UNSTABLE ON THURSDAY WITH THE
COLDER MOVING IN ALOFT. AS SUCH THERE WILL ALSO BE A SLIGHT CHANCE
OF THUNDERSTORMS OVER THE EASTERN AND NORTHEAST MOUNTAINS IN THE
AFTERNOON. THESE THUNDERSTORMS ARE NOT EXPECTED TO BECOME SEVERE
THOUGH SOME COULD PRODUCE SMALL HAIL AND GUSTY WINDS. THE ACTIVE
WEATHER PATTERN WILL PERSIST WITH ANOTHER SYSTEM MOVING INTO THE CWA
ON FRIDAY AND AGAIN SATURDAY NIGHT INTO SUNDAY WITH MORE RAIN OR
RAIN SHOWERS. CURRENT FORECAST LOOKS TO BE ON TRACK. 88

&&

.AVIATION...THERE MAY BE BRIEF PERIODS OF MVFR AND POSSIBLY EVEN IFR
CONDITIONS TONIGHT DUE TO LOWERED CIGS AND SHOWERS REDUCING
VISIBILITY. HOWEVER MOST OF THE TIME VFR CONDITIONS WILL PREVAIL.
WINDS WILL RANGE FROM 5 TO 15 KTS OVERNIGHT AND THEN WILL INCREASE
TO 10 TO 20 KTS WITH LOCALLY 15 TO 25 KTS ON THURSDAY AS A COLD
FRONT MOVES ACROSS THE CWA AND MIXES DOWN STRONGER WINDS FROM ALOFT
WITH CONVECTIVE RAIN SHOWERS AND POSSIBLY EVEN THUNDERSTORMS. THE
THUNDERSTORM THREAT WILL PRIMARILY BE AT KPDT AND KALW. 88

&&

.PREV DISC... /ISSUED 225 PM PDT WED APR 23 2014/

SHORT TERM...TONIGHT THROUGH FRIDAY NIGHT. THE CHALLENGE WITH THIS
PACKAGE IS THE RAIN CHANCES ACROSS THE AREA. A STORM SYSTEM WILL
SPREAD ADDITIONAL CLOUDS AND SHOWERS TO THE REGION TONIGHT AND
THURSDAY AS A LOW PRESSURE SYSTEM APPROACHES THE PACNW COAST TOWARD
THE END OF THE WORK WEEK. THE ATMOSPHERE ALSO BECOMES INCREASINGLY
UNSTABLE THURSDAY AFTERNOON AND AN ISOLD TSRA IS POSSIBLE OVER THE
EASTERN ZONES. THE SYSTEM MOVES INTO WA/OR FRIDAY AND THE UNSETTLED
WEATHER WILL PERSIST INTO FRIDAY NIGHT. THE BEST CHANCES FOR PCPN
SHOULD OCCUR LATER TONIGHT AND THURSDAY BEFORE LESSENING INTO
THURSDAY NIGHT. HOWEVER THE CHANCES FOR SHOWERS WILL PERSIST
ESPECIALLY IN THE AREA MOUNTAINS. SNOW LEVELS SHOULD REMAIN ABOVE 4K
FEET DESPITE COOLER TEMPERATURES EXPECTED BY FRIDAY.

LONG TERM...SATURDAY THROUGH WEDNESDAY NIGHT...UPPER LEVEL TROUGH
OVER THE AREA WILL PUSH OFF TO THE EAST SATURDAY...WITH PROGRESSIVE
WESTERLY FLOW TO FOLLOW.  A BREAK IN THE MOISTURE SATURDAY INTO
SUNDAY...BUT STILL A CHANCE FOR SHOWERS OVER THE MOUNTAINS AND A
SLIGHT CHANCE ACROSS THE VALLEYS.  OVERALL...SNOW LEVELS WILL BE
3500-4500 FEET SATURDAY INTO SUNDAY...WITH SNOW LEVELS RISING MONDAY
ONWARD.  BY MONDAY NIGHT...A DRIER SOUTHWEST FLOW WILL SET IN AND
SNOW LEVELS ARE EXPECTED TO RISE BETWEEN 6500-7500 FEET.  AN UPPER
LEVEL RIDGE WILL BUILD OVER THE AREA FOR THE EXTENDED.  TEMPERATURES
WILL START OFF IN THE MID 60S ACROSS THE LOWER ELEVATIONS OVER THE
WEEKEND...AND SHOULD BE IN THE MID 70S BY TUESDAY AND WEDNESDAY.
THERE IS SOME DISCREPANCIES WITH MODEL CONSISTENCY AND CONTINUITY
AFTER TUESDAY.  GFS MODEL HAS A STRONG COLD FRONT TO PUSH THROUGH
THE AREA...WITH INCREASED CHANCES OF PRECIPITATION.  THUNDERSTORMS
CAN`T BE RULED OUT WITH THIS SCENARIO AS WELL.  HOWEVER...ECMWF
CONTINUES TO HOLD ONTO THE UPPER LEVEL RIDGE WITH CONTINUED WARM AND
DRY TEMPERATURES.  LEANING TOWARD THE ECMWF FOR THE
EXTENDED...THEREFORE THE CURRENT FORECAST REFLECTS DRIER AND
SLIGHTLY WARMER WEDNESDAY AFTERNOON AND EVENING.  NO THUNDER HAS
BEEN ADDED TO THE EXTENDED...AS CONFIDENCE IS NOT HIGH ENOUGH TO
MENTION.  WEBER

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  44  58  39  57 /  60  70  60  50
ALW  47  58  42  58 /  60  80  60  50
PSC  48  64  43  63 /  60  60  20  20
YKM  41  59  35  60 /  50  50  20  10
HRI  46  62  42  61 /  60  60  40  30
ELN  40  57  36  59 /  50  60  20  10
RDM  39  55  30  49 /  60  50  60  60
LGD  43  53  36  52 /  70  80  70  70
GCD  38  54  34  46 /  60  80  70  80
DLS  46  60  40  60 /  70  60  40  40

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...NONE.
WA...NONE.
&&

THREAT INDEX
THURSDAY : GREEN
FRIDAY : GREEN
SATURDAY : GREEN

GREEN: NONE OR LIMITED NEED FOR WATCHES, WARNINGS, OR ADVISORIES.
YELLOW: A FEW WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.
RED: NUMEROUS WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

88/89/88










000
FXUS66 KPDT 232128
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
225 PM PDT WED APR 23 2014

.SHORT TERM...TONIGHT THROUGH FRIDAY NIGHT. THE CHALLENGE WITH THIS
PACKAGE IS THE RAIN CHANCES ACROSS THE AREA. A STORM SYSTEM WILL
SPREAD ADDITIONAL CLOUDS AND SHOWERS TO THE REGION TONIGHT AND
THURSDAY AS A LOW PRESSURE SYSTEM APPROACHES THE PACNW COAST TOWARD
THE END OF THE WORK WEEK. THE ATMOSPHERE ALSO BECOMES INCREASINGLY
UNSTABLE THURSDAY AFTERNOON AND AN ISOLD TSRA IS POSSIBLE OVER THE
EASTERN ZONES. THE SYSTEM MOVES INTO WA/OR FRIDAY AND THE UNSETTLED
WEATHER WILL PERSIST INTO FRIDAY NIGHT. THE BEST CHANCES FOR PCPN
SHOULD OCCUR LATER TONIGHT AND THURSDAY BEFORE LESSENING INTO
THURSDAY NIGHT. HOWEVER THE CHANCES FOR SHOWERS WILL PERSIST
ESPECIALLY IN THE AREA MOUNTAINS. SNOW LEVELS SHOULD REMAIN ABOVE 4K
FEET DESPITE COOLER TEMPERATURES EXPECTED BY FRIDAY.

.LONG TERM...SATURDAY THROUGH WEDNESDAY NIGHT...UPPER LEVEL TROUGH
OVER THE AREA WILL PUSH OFF TO THE EAST SATURDAY...WITH PROGRESSIVE
WESTERLY FLOW TO FOLLOW.  A BREAK IN THE MOISTURE SATURDAY INTO
SUNDAY...BUT STILL A CHANCE FOR SHOWERS OVER THE MOUNTAINS AND A
SLIGHT CHANCE ACROSS THE VALLEYS.  OVERALL...SNOW LEVELS WILL BE
3500-4500 FEET SATURDAY INTO SUNDAY...WITH SNOW LEVELS RISING MONDAY
ONWARD.  BY MONDAY NIGHT...A DRIER SOUTHWEST FLOW WILL SET IN AND
SNOW LEVELS ARE EXPECTED TO RISE BETWEEN 6500-7500 FEET.  AN UPPER
LEVEL RIDGE WILL BUILD OVER THE AREA FOR THE EXTENDED.  TEMPERATURES
WILL START OFF IN THE MID 60S ACROSS THE LOWER ELEVATIONS OVER THE
WEEKEND...AND SHOULD BE IN THE MID 70S BY TUESDAY AND WEDNESDAY.
THERE IS SOME DISCREPANCIES WITH MODEL CONSISTENCY AND CONTINUITY
AFTER TUESDAY.  GFS MODEL HAS A STRONG COLD FRONT TO PUSH THROUGH
THE AREA...WITH INCREASED CHANCES OF PRECIPITATION.  THUNDERSTORMS
CAN`T BE RULED OUT WITH THIS SCENARIO AS WELL.  HOWEVER...ECMWF
CONTINUES TO HOLD ONTO THE UPPER LEVEL RIDGE WITH CONTINUED WARM AND
DRY TEMPERATURES.  LEANING TOWARD THE ECMWF FOR THE
EXTENDED...THEREFORE THE CURRENT FORECAST REFLECTS DRIER AND
SLIGHTLY WARMER WEDNESDAY AFTERNOON AND EVENING.  NO THUNDER HAS
BEEN ADDED TO THE EXTENDED...AS CONFIDENCE IS NOT HIGH ENOUGH TO
MENTION.  WEBER

&&

.AVIATION...00Z TAFS...A WEAK DISTURBANCE AND A MOIST WESTERLY FLOW
WILL GIVE THE AREA BROKEN TO OVERCAST SKIES THE REST OF TODAY...WITH
A CHANCE OF RAIN SHOWERS.  FOR THE MOST PART...VFR CONDITION WILL BE
PREVALENT...THOUGH LOCALIZED HEAVIER SHOWERS MAY DETERIORATE TO MVFR
LEVELS BRIEFLY. TONIGHT A SYSTEM WILL ARRIVE AND PUSH A WARM FRONT
INTO THE AREA AFTER 06Z...WITH MORE WIDESPREAD RAIN AND SOMEWHAT
LOWER CEILINGS.  THIS WILL CONTINUE INTO THE MORNING HOURS. HAVE
KEPT CIGS AT VFR LEVELS BUT MVFR/IFR CHANCES WILL BE GREATER
TONIGHT...THAN THIS EVENING. WINDS WILL CONTINUE 10 TO 20 KTS WITH
GUSTS TO 30 KTS AND SHOULD DROP TO AROUND 15 KTS AFTER 03Z THIS
EVENING. STRATIFORM RAIN AT KYKM...KDLS...AND KPSC SHOULD BE DONE
WITH BY 18Z TOMORROW...HOWEVER CONVECTIVE RAIN SHOWERS...AND
POSSIBLY THUNDERSTORMS CAN`T BE RULED OUT AFTER 18Z.  WEBER

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  44  58  39  57 /  60  70  60  50
ALW  47  58  42  58 /  60  80  60  50
PSC  48  64  43  63 /  60  60  20  20
YKM  41  59  35  60 /  50  50  20  10
HRI  46  62  42  61 /  60  60  40  30
ELN  40  57  36  59 /  50  60  20  10
RDM  39  55  30  49 /  60  50  60  60
LGD  43  53  36  52 /  70  80  70  70
GCD  38  54  34  46 /  60  80  70  80
DLS  46  60  40  60 /  70  60  40  40

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...NONE.
WA...NONE.
&&

THREAT INDEX
THURSDAY : GREEN
FRIDAY : GREEN
SATURDAY : GREEN

GREEN: NONE OR LIMITED NEED FOR WATCHES, WARNINGS, OR ADVISORIES.
YELLOW: A FEW WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.
RED: NUMEROUS WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

97/89/89










000
FXUS66 KPDT 232128
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
225 PM PDT WED APR 23 2014

.SHORT TERM...TONIGHT THROUGH FRIDAY NIGHT. THE CHALLENGE WITH THIS
PACKAGE IS THE RAIN CHANCES ACROSS THE AREA. A STORM SYSTEM WILL
SPREAD ADDITIONAL CLOUDS AND SHOWERS TO THE REGION TONIGHT AND
THURSDAY AS A LOW PRESSURE SYSTEM APPROACHES THE PACNW COAST TOWARD
THE END OF THE WORK WEEK. THE ATMOSPHERE ALSO BECOMES INCREASINGLY
UNSTABLE THURSDAY AFTERNOON AND AN ISOLD TSRA IS POSSIBLE OVER THE
EASTERN ZONES. THE SYSTEM MOVES INTO WA/OR FRIDAY AND THE UNSETTLED
WEATHER WILL PERSIST INTO FRIDAY NIGHT. THE BEST CHANCES FOR PCPN
SHOULD OCCUR LATER TONIGHT AND THURSDAY BEFORE LESSENING INTO
THURSDAY NIGHT. HOWEVER THE CHANCES FOR SHOWERS WILL PERSIST
ESPECIALLY IN THE AREA MOUNTAINS. SNOW LEVELS SHOULD REMAIN ABOVE 4K
FEET DESPITE COOLER TEMPERATURES EXPECTED BY FRIDAY.

.LONG TERM...SATURDAY THROUGH WEDNESDAY NIGHT...UPPER LEVEL TROUGH
OVER THE AREA WILL PUSH OFF TO THE EAST SATURDAY...WITH PROGRESSIVE
WESTERLY FLOW TO FOLLOW.  A BREAK IN THE MOISTURE SATURDAY INTO
SUNDAY...BUT STILL A CHANCE FOR SHOWERS OVER THE MOUNTAINS AND A
SLIGHT CHANCE ACROSS THE VALLEYS.  OVERALL...SNOW LEVELS WILL BE
3500-4500 FEET SATURDAY INTO SUNDAY...WITH SNOW LEVELS RISING MONDAY
ONWARD.  BY MONDAY NIGHT...A DRIER SOUTHWEST FLOW WILL SET IN AND
SNOW LEVELS ARE EXPECTED TO RISE BETWEEN 6500-7500 FEET.  AN UPPER
LEVEL RIDGE WILL BUILD OVER THE AREA FOR THE EXTENDED.  TEMPERATURES
WILL START OFF IN THE MID 60S ACROSS THE LOWER ELEVATIONS OVER THE
WEEKEND...AND SHOULD BE IN THE MID 70S BY TUESDAY AND WEDNESDAY.
THERE IS SOME DISCREPANCIES WITH MODEL CONSISTENCY AND CONTINUITY
AFTER TUESDAY.  GFS MODEL HAS A STRONG COLD FRONT TO PUSH THROUGH
THE AREA...WITH INCREASED CHANCES OF PRECIPITATION.  THUNDERSTORMS
CAN`T BE RULED OUT WITH THIS SCENARIO AS WELL.  HOWEVER...ECMWF
CONTINUES TO HOLD ONTO THE UPPER LEVEL RIDGE WITH CONTINUED WARM AND
DRY TEMPERATURES.  LEANING TOWARD THE ECMWF FOR THE
EXTENDED...THEREFORE THE CURRENT FORECAST REFLECTS DRIER AND
SLIGHTLY WARMER WEDNESDAY AFTERNOON AND EVENING.  NO THUNDER HAS
BEEN ADDED TO THE EXTENDED...AS CONFIDENCE IS NOT HIGH ENOUGH TO
MENTION.  WEBER

&&

.AVIATION...00Z TAFS...A WEAK DISTURBANCE AND A MOIST WESTERLY FLOW
WILL GIVE THE AREA BROKEN TO OVERCAST SKIES THE REST OF TODAY...WITH
A CHANCE OF RAIN SHOWERS.  FOR THE MOST PART...VFR CONDITION WILL BE
PREVALENT...THOUGH LOCALIZED HEAVIER SHOWERS MAY DETERIORATE TO MVFR
LEVELS BRIEFLY. TONIGHT A SYSTEM WILL ARRIVE AND PUSH A WARM FRONT
INTO THE AREA AFTER 06Z...WITH MORE WIDESPREAD RAIN AND SOMEWHAT
LOWER CEILINGS.  THIS WILL CONTINUE INTO THE MORNING HOURS. HAVE
KEPT CIGS AT VFR LEVELS BUT MVFR/IFR CHANCES WILL BE GREATER
TONIGHT...THAN THIS EVENING. WINDS WILL CONTINUE 10 TO 20 KTS WITH
GUSTS TO 30 KTS AND SHOULD DROP TO AROUND 15 KTS AFTER 03Z THIS
EVENING. STRATIFORM RAIN AT KYKM...KDLS...AND KPSC SHOULD BE DONE
WITH BY 18Z TOMORROW...HOWEVER CONVECTIVE RAIN SHOWERS...AND
POSSIBLY THUNDERSTORMS CAN`T BE RULED OUT AFTER 18Z.  WEBER

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  44  58  39  57 /  60  70  60  50
ALW  47  58  42  58 /  60  80  60  50
PSC  48  64  43  63 /  60  60  20  20
YKM  41  59  35  60 /  50  50  20  10
HRI  46  62  42  61 /  60  60  40  30
ELN  40  57  36  59 /  50  60  20  10
RDM  39  55  30  49 /  60  50  60  60
LGD  43  53  36  52 /  70  80  70  70
GCD  38  54  34  46 /  60  80  70  80
DLS  46  60  40  60 /  70  60  40  40

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...NONE.
WA...NONE.
&&

THREAT INDEX
THURSDAY : GREEN
FRIDAY : GREEN
SATURDAY : GREEN

GREEN: NONE OR LIMITED NEED FOR WATCHES, WARNINGS, OR ADVISORIES.
YELLOW: A FEW WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.
RED: NUMEROUS WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

97/89/89









000
FXUS66 KPDT 231738 AAB
AFDPDT

AREA FORECAST DISCUSSION...UPDATE
NATIONAL WEATHER SERVICE PENDLETON OR
1038 AM PDT WED APR 23 2014

UPDATED FOR AVIATION DISCUSSION

.UPDATE...THE LATEST RADAR WAS SHOWING SCATTERED SHOWERS OVER THE
BLUE MOUNTAINS AND OVER THE WA/OR CASCADES. ELSEWHERE ISOLATED
SHOWERS WERE OCCURRING AND THIS IS EXPECTED FOR THE REMAINDER OF THE
DAY. A STORM SYSTEM WILL TAKE AIM ON THE PACNW TONIGHT WITH
INCREASING SHOWERS EXPECTED TOWARD THURSDAY MORNING.

OTHERWISE TEMPERATURES WILL BE SLIGHTLY BELOW NORMAL AND THE PRESENT
SHORT TERM FORECAST APPEARS ON TRACK.

&&

.AVIATION...18Z TAFS...A WEAK DISTURBANCE AND A MOIST WESTERLY FLOW
WILL GIVE THE AREA BROKEN TO OVERCAST SKIES TODAY WITH A CHANCE OF
MOSTLY LIGHT RAIN SHOWERS. VFR CONDITION WILL BE PREVALENT...THOUGH
THE HEAVIER SHOWERS MAY DETERIORATE TO MVFR LEVELS BRIEFLY. THIS
EVENING A SYSTEM WILL ARRIVE AND PUSH A WARM FRONT INTO THE AREA
AFTER 00Z WITH MORE WIDESPREAD RAIN AND SOMEWHAT LOWER CEILINGS.
THIS WILL CONTINUE OVERNIGHT TONIGHT AND INTO THE MORNING HOURS.
HAVE KEPT CIGS AT VFR LEVELS BUT MVFR/IFR CHANCES WILL BE GREATER
WITH THIS SYSTEM THAN THIS AFTERNOON. WINDS HAVE INCREASED AROUND
10 TO 20 KTS WITH GUSTS TO 30 KTS AND SHOULD DROP TO AROUND 15 KTS
AFTER 03Z THIS EVENING. WEBER

&&

.PREV DISC... /ISSUED 500 AM PDT WED APR 23 2014/

SHORT TERM...TODAY THROUGH THURSDAY EVENING...A WEAK DISTURBANCE
WILL MOVE EAST ACROSS THE REGION THIS MORNING CAUSING VARYING
CHANCES OF SHOWERS. THE BEST CHANCES WILL BE OVER AND NEAR THE
MOUNTAINS, ESPECIALLY IN UPSLOPE AND SLOP OVER FAVORED AREAS. AN
ONSHORE LOW LEVEL FLOW WILL CONTINUE THE CHANCES OF SHOWERS, THOUGH
PROBABILITIES WILL BE SLIGHTLY LOWER THAN THIS MORNING. A STRONGER
SYSTEM WILL APPROACH THE PACIFIC NORTHWEST THIS EVENING. THIS SYSTEM
WILL SWING A WARM FRONT ACROSS THE REGION OVERNIGHT THROUGH MID
MORNING THURSDAY. AS SUCH WILL CONTINUE CURRENT HIGH CHANCES OF
PRECIP FOR LATE TONIGHT INTO THURSDAY MORNING. WILL INDICATE
POST-FRONTAL LOWER POPS IN THE LEE OF THE CASCADES THURSDAY MORNING
DUE TO DOWNSLOPE AFFECTS. THIS WARM FRONT WILL CAUSE SNOW LEVELS TO
RISE TONIGHT INTO THURSDAY. THIS STRONGER SYSTEM`S COLD FRONT IS
EXPECTED TO MOVE ACROSS THE REGION THURSDAY AFTERNOON AND EVENING.
EXPECT SHOWERS TO ACCOMPANY THIS COLD FRONT. MAY ALSO SEE A FEW
THUNDERSTORMS DEVELOP ALONG THIS BOUNDARY LATE AFTERNOON INTO EARLY
EVENING OVER THE BLUE MOUNTAINS AND THEIR ADJACENT FOOTHILLS, THE
GRANDE RONDE VALLEY, AS WELL AS GRANT AND WALLOWA COUNTIES. BREEZY
TO LOCALLY WINDY CONDITIONS WILL BE POSSIBLE ACROSS THE AREA BOTH
TODAY AND THURSDAY. 90

LONG TERM...THURSDAY NIGHT THROUGH WEDNESDAY...A SYSTEM WILL BE
MOVING OUT OF THE AREA THURSDAY NIGHT. LINGERING INSTABILITY SHOULD
LEAD TO A CHANCE OF RAIN SHOWERS OVER MOST OF THE AREA THOUGH THE
WASHINGTON COLUMBIA BASIN WILL BE MAINLY DRY WEST OF THE TRI-CITIES.
THE INSTABILITY WILL LEAD TO A CHANCE OF A FEW THUNDERSTORMS IN THE
EARLY EVENING OVER THE EASTERN MOUNTAINS. FRIDAY WILL SEE A TROUGH
REMAINING OVER THE AREA AND ONCE AGAIN MOST OF THE AREA WILL HAVE A
CHANCE OF RAIN SHOWERS AND MOUNTAINS SNOW SHOWERS ABOVE 4000 FEET
THROUGH THE DAY THOUGH THE WASHINGTON COLUMBIA BASIN WILL ONLY HAVE
A SLIGHT CHANCE OF RAIN SHOWERS. THE TROUGH WILL REMAIN FRIDAY NIGHT
AND SATURDAY THOUGH MOST OF THE ENERGY WILL SINK FAR TO OUR SOUTH.
THIS WILL ALLOW THE LOWER ELEVATIONS TO DRY OUT WHILE THE MOUNTAINS
MAINTAIN A CHANCE OF RAIN AND SNOW SHOWERS WITH THE SNOW LEVEL AT
4000 TO 4500 FEET. THE TROUGH LEAVES TO THE EAST SATURDAY NIGHT AS
ANOTHER SYSTEM APPROACHES THE COAST. MODELS DIFFER AS TO THE
STRENGTH AND TIMING OF WHEN IT MOVES THROUGH THE AREA. HAVE KEPT THE
CURRENT FORECAST OF A SLIGHT CHANCE OF RAIN IN THE LOWER ELEVATIONS
AND A CHANCE OF RAIN IN THE MOUNTAINS SATURDAY NIGHT AND SUNDAY THEN
DRYING OUT IN THE LOWER ELEVATIONS SUNDAY NIGHT AND MONDAY. RIDGING
BUILDS OVER THE AREA MONDAY THROUGH MONDAY NIGHT WITH A WEAK SYSTEM
RIDING OVER THE RIDGE AND PERHAPS BRUSHING THE WASHINGTON CASCADE
CREST WITH A SLIGHT CHANCE OF RAIN SHOWERS. MODELS DIVERGE AT THIS
POINT WITH THE ECMWF MAINTAINING A RIDGE THROUGH WEDNESDAY FOR MORE
DRY WEATHER WHILE THE GFS PUSHES THE RIDGE OFF TO THE EAST AND SENDS
A SYSTEM THROUGH THE AREA TUESDAY NIGHT AND WEDNESDAY. HAVE LEANED
TOWARDS THE ECMWF AND HAVE A DRY FORECAST THROUGH THURSDAY. PERRY

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  56  45  61  41 /  50  60  70  60
ALW  57  48  61  44 /  60  60  80  60
PSC  62  49  66  47 /  30  60  60  20
YKM  59  43  62  38 /  20  50  50  20
HRI  59  47  65  44 /  30  60  60  40
ELN  57  41  60  36 /  20  50  60  20
RDM  56  38  58  32 /  30  60  50  60
LGD  55  44  56  38 /  50  70  80  70
GCD  55  39  57  36 /  40  60  80  70
DLS  59  46  63  42 /  50  70  60  40

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...NONE.
WA...NONE.
&&

THREAT INDEX
TODAY : GREEN
THURSDAY : GREEN
FRIDAY : GREEN

GREEN: NONE OR LIMITED NEED FOR WATCHES, WARNINGS, OR ADVISORIES.
YELLOW: A FEW WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.
RED: NUMEROUS WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

97/








000
FXUS66 KPDT 231738 AAB
AFDPDT

AREA FORECAST DISCUSSION...UPDATE
NATIONAL WEATHER SERVICE PENDLETON OR
1038 AM PDT WED APR 23 2014

UPDATED FOR AVIATION DISCUSSION

.UPDATE...THE LATEST RADAR WAS SHOWING SCATTERED SHOWERS OVER THE
BLUE MOUNTAINS AND OVER THE WA/OR CASCADES. ELSEWHERE ISOLATED
SHOWERS WERE OCCURRING AND THIS IS EXPECTED FOR THE REMAINDER OF THE
DAY. A STORM SYSTEM WILL TAKE AIM ON THE PACNW TONIGHT WITH
INCREASING SHOWERS EXPECTED TOWARD THURSDAY MORNING.

OTHERWISE TEMPERATURES WILL BE SLIGHTLY BELOW NORMAL AND THE PRESENT
SHORT TERM FORECAST APPEARS ON TRACK.

&&

.AVIATION...18Z TAFS...A WEAK DISTURBANCE AND A MOIST WESTERLY FLOW
WILL GIVE THE AREA BROKEN TO OVERCAST SKIES TODAY WITH A CHANCE OF
MOSTLY LIGHT RAIN SHOWERS. VFR CONDITION WILL BE PREVALENT...THOUGH
THE HEAVIER SHOWERS MAY DETERIORATE TO MVFR LEVELS BRIEFLY. THIS
EVENING A SYSTEM WILL ARRIVE AND PUSH A WARM FRONT INTO THE AREA
AFTER 00Z WITH MORE WIDESPREAD RAIN AND SOMEWHAT LOWER CEILINGS.
THIS WILL CONTINUE OVERNIGHT TONIGHT AND INTO THE MORNING HOURS.
HAVE KEPT CIGS AT VFR LEVELS BUT MVFR/IFR CHANCES WILL BE GREATER
WITH THIS SYSTEM THAN THIS AFTERNOON. WINDS HAVE INCREASED AROUND
10 TO 20 KTS WITH GUSTS TO 30 KTS AND SHOULD DROP TO AROUND 15 KTS
AFTER 03Z THIS EVENING. WEBER

&&

.PREV DISC... /ISSUED 500 AM PDT WED APR 23 2014/

SHORT TERM...TODAY THROUGH THURSDAY EVENING...A WEAK DISTURBANCE
WILL MOVE EAST ACROSS THE REGION THIS MORNING CAUSING VARYING
CHANCES OF SHOWERS. THE BEST CHANCES WILL BE OVER AND NEAR THE
MOUNTAINS, ESPECIALLY IN UPSLOPE AND SLOP OVER FAVORED AREAS. AN
ONSHORE LOW LEVEL FLOW WILL CONTINUE THE CHANCES OF SHOWERS, THOUGH
PROBABILITIES WILL BE SLIGHTLY LOWER THAN THIS MORNING. A STRONGER
SYSTEM WILL APPROACH THE PACIFIC NORTHWEST THIS EVENING. THIS SYSTEM
WILL SWING A WARM FRONT ACROSS THE REGION OVERNIGHT THROUGH MID
MORNING THURSDAY. AS SUCH WILL CONTINUE CURRENT HIGH CHANCES OF
PRECIP FOR LATE TONIGHT INTO THURSDAY MORNING. WILL INDICATE
POST-FRONTAL LOWER POPS IN THE LEE OF THE CASCADES THURSDAY MORNING
DUE TO DOWNSLOPE AFFECTS. THIS WARM FRONT WILL CAUSE SNOW LEVELS TO
RISE TONIGHT INTO THURSDAY. THIS STRONGER SYSTEM`S COLD FRONT IS
EXPECTED TO MOVE ACROSS THE REGION THURSDAY AFTERNOON AND EVENING.
EXPECT SHOWERS TO ACCOMPANY THIS COLD FRONT. MAY ALSO SEE A FEW
THUNDERSTORMS DEVELOP ALONG THIS BOUNDARY LATE AFTERNOON INTO EARLY
EVENING OVER THE BLUE MOUNTAINS AND THEIR ADJACENT FOOTHILLS, THE
GRANDE RONDE VALLEY, AS WELL AS GRANT AND WALLOWA COUNTIES. BREEZY
TO LOCALLY WINDY CONDITIONS WILL BE POSSIBLE ACROSS THE AREA BOTH
TODAY AND THURSDAY. 90

LONG TERM...THURSDAY NIGHT THROUGH WEDNESDAY...A SYSTEM WILL BE
MOVING OUT OF THE AREA THURSDAY NIGHT. LINGERING INSTABILITY SHOULD
LEAD TO A CHANCE OF RAIN SHOWERS OVER MOST OF THE AREA THOUGH THE
WASHINGTON COLUMBIA BASIN WILL BE MAINLY DRY WEST OF THE TRI-CITIES.
THE INSTABILITY WILL LEAD TO A CHANCE OF A FEW THUNDERSTORMS IN THE
EARLY EVENING OVER THE EASTERN MOUNTAINS. FRIDAY WILL SEE A TROUGH
REMAINING OVER THE AREA AND ONCE AGAIN MOST OF THE AREA WILL HAVE A
CHANCE OF RAIN SHOWERS AND MOUNTAINS SNOW SHOWERS ABOVE 4000 FEET
THROUGH THE DAY THOUGH THE WASHINGTON COLUMBIA BASIN WILL ONLY HAVE
A SLIGHT CHANCE OF RAIN SHOWERS. THE TROUGH WILL REMAIN FRIDAY NIGHT
AND SATURDAY THOUGH MOST OF THE ENERGY WILL SINK FAR TO OUR SOUTH.
THIS WILL ALLOW THE LOWER ELEVATIONS TO DRY OUT WHILE THE MOUNTAINS
MAINTAIN A CHANCE OF RAIN AND SNOW SHOWERS WITH THE SNOW LEVEL AT
4000 TO 4500 FEET. THE TROUGH LEAVES TO THE EAST SATURDAY NIGHT AS
ANOTHER SYSTEM APPROACHES THE COAST. MODELS DIFFER AS TO THE
STRENGTH AND TIMING OF WHEN IT MOVES THROUGH THE AREA. HAVE KEPT THE
CURRENT FORECAST OF A SLIGHT CHANCE OF RAIN IN THE LOWER ELEVATIONS
AND A CHANCE OF RAIN IN THE MOUNTAINS SATURDAY NIGHT AND SUNDAY THEN
DRYING OUT IN THE LOWER ELEVATIONS SUNDAY NIGHT AND MONDAY. RIDGING
BUILDS OVER THE AREA MONDAY THROUGH MONDAY NIGHT WITH A WEAK SYSTEM
RIDING OVER THE RIDGE AND PERHAPS BRUSHING THE WASHINGTON CASCADE
CREST WITH A SLIGHT CHANCE OF RAIN SHOWERS. MODELS DIVERGE AT THIS
POINT WITH THE ECMWF MAINTAINING A RIDGE THROUGH WEDNESDAY FOR MORE
DRY WEATHER WHILE THE GFS PUSHES THE RIDGE OFF TO THE EAST AND SENDS
A SYSTEM THROUGH THE AREA TUESDAY NIGHT AND WEDNESDAY. HAVE LEANED
TOWARDS THE ECMWF AND HAVE A DRY FORECAST THROUGH THURSDAY. PERRY

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  56  45  61  41 /  50  60  70  60
ALW  57  48  61  44 /  60  60  80  60
PSC  62  49  66  47 /  30  60  60  20
YKM  59  43  62  38 /  20  50  50  20
HRI  59  47  65  44 /  30  60  60  40
ELN  57  41  60  36 /  20  50  60  20
RDM  56  38  58  32 /  30  60  50  60
LGD  55  44  56  38 /  50  70  80  70
GCD  55  39  57  36 /  40  60  80  70
DLS  59  46  63  42 /  50  70  60  40

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...NONE.
WA...NONE.
&&

THREAT INDEX
TODAY : GREEN
THURSDAY : GREEN
FRIDAY : GREEN

GREEN: NONE OR LIMITED NEED FOR WATCHES, WARNINGS, OR ADVISORIES.
YELLOW: A FEW WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.
RED: NUMEROUS WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

97/







000
FXUS66 KPDT 231559 AAA
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
855 AM PDT WED APR 23 2014

.UPDATE...THE LATEST RADAR WAS SHOWING SCATTERED SHOWERS OVER THE
BLUE MOUNTAINS AND OVER THE WA/OR CASCADES. ELSEWHERE ISOLATED
SHOWERS WERE OCCURRING AND THIS IS EXPECTED FOR THE REMAINDER OF THE
DAY. A STORM SYSTEM WILL TAKE AIM ON THE PACNW TONIGHT WITH
INCREASING SHOWERS EXPECTED TOWARD THURSDAY MORNING.

OTHERWISE TEMPERATURES WILL BE SLIGHTLY BELOW NORMAL AND THE PRESENT
SHORT TERM FORECAST APPEARS ON TRACK.

&&

.PREV DISC... /ISSUED 500 AM PDT WED APR 23 2014/

SHORT TERM...TODAY THROUGH THURSDAY EVENING...A WEAK DISTURBANCE
WILL MOVE EAST ACROSS THE REGION THIS MORNING CAUSING VARYING
CHANCES OF SHOWERS. THE BEST CHANCES WILL BE OVER AND NEAR THE
MOUNTAINS, ESPECIALLY IN UPSLOPE AND SLOP OVER FAVORED AREAS. AN
ONSHORE LOW LEVEL FLOW WILL CONTINUE THE CHANCES OF SHOWERS, THOUGH
PROBABILITIES WILL BE SLIGHTLY LOWER THAN THIS MORNING. A STRONGER
SYSTEM WILL APPROACH THE PACIFIC NORTHWEST THIS EVENING. THIS SYSTEM
WILL SWING A WARM FRONT ACROSS THE REGION OVERNIGHT THROUGH MID
MORNING THURSDAY. AS SUCH WILL CONTINUE CURRENT HIGH CHANCES OF
PRECIP FOR LATE TONIGHT INTO THURSDAY MORNING. WILL INDICATE
POST-FRONTAL LOWER POPS IN THE LEE OF THE CASCADES THURSDAY MORNING
DUE TO DOWNSLOPE AFFECTS. THIS WARM FRONT WILL CAUSE SNOW LEVELS TO
RISE TONIGHT INTO THURSDAY. THIS STRONGER SYSTEM`S COLD FRONT IS
EXPECTED TO MOVE ACROSS THE REGION THURSDAY AFTERNOON AND EVENING.
EXPECT SHOWERS TO ACCOMPANY THIS COLD FRONT. MAY ALSO SEE A FEW
THUNDERSTORMS DEVELOP ALONG THIS BOUNDARY LATE AFTERNOON INTO EARLY
EVENING OVER THE BLUE MOUNTAINS AND THEIR ADJACENT FOOTHILLS, THE
GRANDE RONDE VALLEY, AS WELL AS GRANT AND WALLOWA COUNTIES. BREEZY
TO LOCALLY WINDY CONDITIONS WILL BE POSSIBLE ACROSS THE AREA BOTH
TODAY AND THURSDAY. 90

LONG TERM...THURSDAY NIGHT THROUGH WEDNESDAY...A SYSTEM WILL BE
MOVING OUT OF THE AREA THURSDAY NIGHT. LINGERING INSTABILITY SHOULD
LEAD TO A CHANCE OF RAIN SHOWERS OVER MOST OF THE AREA THOUGH THE
WASHINGTON COLUMBIA BASIN WILL BE MAINLY DRY WEST OF THE TRI-CITIES.
THE INSTABILITY WILL LEAD TO A CHANCE OF A FEW THUNDERSTORMS IN THE
EARLY EVENING OVER THE EASTERN MOUNTAINS. FRIDAY WILL SEE A TROUGH
REMAINING OVER THE AREA AND ONCE AGAIN MOST OF THE AREA WILL HAVE A
CHANCE OF RAIN SHOWERS AND MOUNTAINS SNOW SHOWERS ABOVE 4000 FEET
THROUGH THE DAY THOUGH THE WASHINGTON COLUMBIA BASIN WILL ONLY HAVE
A SLIGHT CHANCE OF RAIN SHOWERS. THE TROUGH WILL REMAIN FRIDAY NIGHT
AND SATURDAY THOUGH MOST OF THE ENERGY WILL SINK FAR TO OUR SOUTH.
THIS WILL ALLOW THE LOWER ELEVATIONS TO DRY OUT WHILE THE MOUNTAINS
MAINTAIN A CHANCE OF RAIN AND SNOW SHOWERS WITH THE SNOW LEVEL AT
4000 TO 4500 FEET. THE TROUGH LEAVES TO THE EAST SATURDAY NIGHT AS
ANOTHER SYSTEM APPROACHES THE COAST. MODELS DIFFER AS TO THE
STRENGTH AND TIMING OF WHEN IT MOVES THROUGH THE AREA. HAVE KEPT THE
CURRENT FORECAST OF A SLIGHT CHANCE OF RAIN IN THE LOWER ELEVATIONS
AND A CHANCE OF RAIN IN THE MOUNTAINS SATURDAY NIGHT AND SUNDAY THEN
DRYING OUT IN THE LOWER ELEVATIONS SUNDAY NIGHT AND MONDAY. RIDGING
BUILDS OVER THE AREA MONDAY THROUGH MONDAY NIGHT WITH A WEAK SYSTEM
RIDING OVER THE RIDGE AND PERHAPS BRUSHING THE WASHINGTON CASCADE
CREST WITH A SLIGHT CHANCE OF RAIN SHOWERS. MODELS DIVERGE AT THIS
POINT WITH THE ECMWF MAINTAINING A RIDGE THROUGH WEDNESDAY FOR MORE
DRY WEATHER WHILE THE GFS PUSHES THE RIDGE OFF TO THE EAST AND SENDS
A SYSTEM THROUGH THE AREA TUESDAY NIGHT AND WEDNESDAY. HAVE LEANED
TOWARDS THE ECMWF AND HAVE A DRY FORECAST THROUGH THURSDAY. PERRY

AVIATION...12Z TAFS...A WEAK DISTURBANCE AND A MOIST WESTERLY FLOW
WILL GIVE THE AREA BROKEN TO OVERCAST SKIES TODAY WITH A CHANCE OF
MOSTLY LIGHT RAIN SHOWERS. VFR CONDITION WILL BE PREVALENT THOUGH
THE HEAVIER SHOWERS MAY DETERIORATE TO MVFR LEVELS BRIEFLY. THIS
EVENING A SYSTEM WILL ARRIVE AND PUSH A WARM FRONT INTO THE AREA
AFTER 00Z WITH MORE WIDESPREAD RAIN AND SOMEWHAT LOWER CEILINGS.
HAVE KEPT CIGS AT VFR LEVELS BUT MVFR/IFR CHANCES WILL BE GREATER
WITH THIS SYSTEM THAN EARLIER TODAY. WINDS WILL INCREASE LATER THIS
MORNING TO 10 TO 20 KTS WITH GUSTS TO 30 KTS THEN DROP BELOW 15 KTS
AFTER 03Z. THIS EVENING. PERRY

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  56  45  61  41 /  50  60  70  60
ALW  57  48  61  44 /  60  60  80  60
PSC  62  49  66  47 /  30  60  60  20
YKM  59  43  62  38 /  20  50  50  20
HRI  59  47  65  44 /  30  60  60  40
ELN  57  41  60  36 /  20  50  60  20
RDM  56  38  58  32 /  30  60  50  60
LGD  55  44  56  38 /  50  70  80  70
GCD  55  39  57  36 /  40  60  80  70
DLS  59  46  63  42 /  50  70  60  40

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...NONE.
WA...NONE.
&&

THREAT INDEX
TODAY : GREEN
THURSDAY : GREEN
FRIDAY : GREEN

GREEN: NONE OR LIMITED NEED FOR WATCHES, WARNINGS, OR ADVISORIES.
YELLOW: A FEW WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.
RED: NUMEROUS WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

97/










000
FXUS66 KPDT 231559 AAA
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
855 AM PDT WED APR 23 2014

.UPDATE...THE LATEST RADAR WAS SHOWING SCATTERED SHOWERS OVER THE
BLUE MOUNTAINS AND OVER THE WA/OR CASCADES. ELSEWHERE ISOLATED
SHOWERS WERE OCCURRING AND THIS IS EXPECTED FOR THE REMAINDER OF THE
DAY. A STORM SYSTEM WILL TAKE AIM ON THE PACNW TONIGHT WITH
INCREASING SHOWERS EXPECTED TOWARD THURSDAY MORNING.

OTHERWISE TEMPERATURES WILL BE SLIGHTLY BELOW NORMAL AND THE PRESENT
SHORT TERM FORECAST APPEARS ON TRACK.

&&

.PREV DISC... /ISSUED 500 AM PDT WED APR 23 2014/

SHORT TERM...TODAY THROUGH THURSDAY EVENING...A WEAK DISTURBANCE
WILL MOVE EAST ACROSS THE REGION THIS MORNING CAUSING VARYING
CHANCES OF SHOWERS. THE BEST CHANCES WILL BE OVER AND NEAR THE
MOUNTAINS, ESPECIALLY IN UPSLOPE AND SLOP OVER FAVORED AREAS. AN
ONSHORE LOW LEVEL FLOW WILL CONTINUE THE CHANCES OF SHOWERS, THOUGH
PROBABILITIES WILL BE SLIGHTLY LOWER THAN THIS MORNING. A STRONGER
SYSTEM WILL APPROACH THE PACIFIC NORTHWEST THIS EVENING. THIS SYSTEM
WILL SWING A WARM FRONT ACROSS THE REGION OVERNIGHT THROUGH MID
MORNING THURSDAY. AS SUCH WILL CONTINUE CURRENT HIGH CHANCES OF
PRECIP FOR LATE TONIGHT INTO THURSDAY MORNING. WILL INDICATE
POST-FRONTAL LOWER POPS IN THE LEE OF THE CASCADES THURSDAY MORNING
DUE TO DOWNSLOPE AFFECTS. THIS WARM FRONT WILL CAUSE SNOW LEVELS TO
RISE TONIGHT INTO THURSDAY. THIS STRONGER SYSTEM`S COLD FRONT IS
EXPECTED TO MOVE ACROSS THE REGION THURSDAY AFTERNOON AND EVENING.
EXPECT SHOWERS TO ACCOMPANY THIS COLD FRONT. MAY ALSO SEE A FEW
THUNDERSTORMS DEVELOP ALONG THIS BOUNDARY LATE AFTERNOON INTO EARLY
EVENING OVER THE BLUE MOUNTAINS AND THEIR ADJACENT FOOTHILLS, THE
GRANDE RONDE VALLEY, AS WELL AS GRANT AND WALLOWA COUNTIES. BREEZY
TO LOCALLY WINDY CONDITIONS WILL BE POSSIBLE ACROSS THE AREA BOTH
TODAY AND THURSDAY. 90

LONG TERM...THURSDAY NIGHT THROUGH WEDNESDAY...A SYSTEM WILL BE
MOVING OUT OF THE AREA THURSDAY NIGHT. LINGERING INSTABILITY SHOULD
LEAD TO A CHANCE OF RAIN SHOWERS OVER MOST OF THE AREA THOUGH THE
WASHINGTON COLUMBIA BASIN WILL BE MAINLY DRY WEST OF THE TRI-CITIES.
THE INSTABILITY WILL LEAD TO A CHANCE OF A FEW THUNDERSTORMS IN THE
EARLY EVENING OVER THE EASTERN MOUNTAINS. FRIDAY WILL SEE A TROUGH
REMAINING OVER THE AREA AND ONCE AGAIN MOST OF THE AREA WILL HAVE A
CHANCE OF RAIN SHOWERS AND MOUNTAINS SNOW SHOWERS ABOVE 4000 FEET
THROUGH THE DAY THOUGH THE WASHINGTON COLUMBIA BASIN WILL ONLY HAVE
A SLIGHT CHANCE OF RAIN SHOWERS. THE TROUGH WILL REMAIN FRIDAY NIGHT
AND SATURDAY THOUGH MOST OF THE ENERGY WILL SINK FAR TO OUR SOUTH.
THIS WILL ALLOW THE LOWER ELEVATIONS TO DRY OUT WHILE THE MOUNTAINS
MAINTAIN A CHANCE OF RAIN AND SNOW SHOWERS WITH THE SNOW LEVEL AT
4000 TO 4500 FEET. THE TROUGH LEAVES TO THE EAST SATURDAY NIGHT AS
ANOTHER SYSTEM APPROACHES THE COAST. MODELS DIFFER AS TO THE
STRENGTH AND TIMING OF WHEN IT MOVES THROUGH THE AREA. HAVE KEPT THE
CURRENT FORECAST OF A SLIGHT CHANCE OF RAIN IN THE LOWER ELEVATIONS
AND A CHANCE OF RAIN IN THE MOUNTAINS SATURDAY NIGHT AND SUNDAY THEN
DRYING OUT IN THE LOWER ELEVATIONS SUNDAY NIGHT AND MONDAY. RIDGING
BUILDS OVER THE AREA MONDAY THROUGH MONDAY NIGHT WITH A WEAK SYSTEM
RIDING OVER THE RIDGE AND PERHAPS BRUSHING THE WASHINGTON CASCADE
CREST WITH A SLIGHT CHANCE OF RAIN SHOWERS. MODELS DIVERGE AT THIS
POINT WITH THE ECMWF MAINTAINING A RIDGE THROUGH WEDNESDAY FOR MORE
DRY WEATHER WHILE THE GFS PUSHES THE RIDGE OFF TO THE EAST AND SENDS
A SYSTEM THROUGH THE AREA TUESDAY NIGHT AND WEDNESDAY. HAVE LEANED
TOWARDS THE ECMWF AND HAVE A DRY FORECAST THROUGH THURSDAY. PERRY

AVIATION...12Z TAFS...A WEAK DISTURBANCE AND A MOIST WESTERLY FLOW
WILL GIVE THE AREA BROKEN TO OVERCAST SKIES TODAY WITH A CHANCE OF
MOSTLY LIGHT RAIN SHOWERS. VFR CONDITION WILL BE PREVALENT THOUGH
THE HEAVIER SHOWERS MAY DETERIORATE TO MVFR LEVELS BRIEFLY. THIS
EVENING A SYSTEM WILL ARRIVE AND PUSH A WARM FRONT INTO THE AREA
AFTER 00Z WITH MORE WIDESPREAD RAIN AND SOMEWHAT LOWER CEILINGS.
HAVE KEPT CIGS AT VFR LEVELS BUT MVFR/IFR CHANCES WILL BE GREATER
WITH THIS SYSTEM THAN EARLIER TODAY. WINDS WILL INCREASE LATER THIS
MORNING TO 10 TO 20 KTS WITH GUSTS TO 30 KTS THEN DROP BELOW 15 KTS
AFTER 03Z. THIS EVENING. PERRY

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  56  45  61  41 /  50  60  70  60
ALW  57  48  61  44 /  60  60  80  60
PSC  62  49  66  47 /  30  60  60  20
YKM  59  43  62  38 /  20  50  50  20
HRI  59  47  65  44 /  30  60  60  40
ELN  57  41  60  36 /  20  50  60  20
RDM  56  38  58  32 /  30  60  50  60
LGD  55  44  56  38 /  50  70  80  70
GCD  55  39  57  36 /  40  60  80  70
DLS  59  46  63  42 /  50  70  60  40

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...NONE.
WA...NONE.
&&

THREAT INDEX
TODAY : GREEN
THURSDAY : GREEN
FRIDAY : GREEN

GREEN: NONE OR LIMITED NEED FOR WATCHES, WARNINGS, OR ADVISORIES.
YELLOW: A FEW WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.
RED: NUMEROUS WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

97/











000
FXUS66 KPDT 231201 AAA
AFDPDT

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE PENDLETON OR
500 AM PDT WED APR 23 2014

UPDATED AVIATION DISCUSSION

.SHORT TERM...TODAY THROUGH THURSDAY EVENING...A WEAK DISTURBANCE
WILL MOVE EAST ACROSS THE REGION THIS MORNING CAUSING VARYING
CHANCES OF SHOWERS. THE BEST CHANCES WILL BE OVER AND NEAR THE
MOUNTAINS, ESPECIALLY IN UPSLOPE AND SLOP OVER FAVORED AREAS. AN
ONSHORE LOW LEVEL FLOW WILL CONTINUE THE CHANCES OF SHOWERS, THOUGH
PROBABILITIES WILL BE SLIGHTLY LOWER THAN THIS MORNING. A STRONGER
SYSTEM WILL APPROACH THE PACIFIC NORTHWEST THIS EVENING. THIS SYSTEM
WILL SWING A WARM FRONT ACROSS THE REGION OVERNIGHT THROUGH MID
MORNING THURSDAY. AS SUCH WILL CONTINUE CURRENT HIGH CHANCES OF
PRECIP FOR LATE TONIGHT INTO THURSDAY MORNING. WILL INDICATE
POST-FRONTAL LOWER POPS IN THE LEE OF THE CASCADES THURSDAY MORNING
DUE TO DOWNSLOPE AFFECTS. THIS WARM FRONT WILL CAUSE SNOW LEVELS TO
RISE TONIGHT INTO THURSDAY. THIS STRONGER SYSTEM`S COLD FRONT IS
EXPECTED TO MOVE ACROSS THE REGION THURSDAY AFTERNOON AND EVENING.
EXPECT SHOWERS TO ACCOMPANY THIS COLD FRONT. MAY ALSO SEE A FEW
THUNDERSTORMS DEVELOP ALONG THIS BOUNDARY LATE AFTERNOON INTO EARLY
EVENING OVER THE BLUE MOUNTAINS AND THEIR ADJACENT FOOTHILLS, THE
GRANDE RONDE VALLEY, AS WELL AS GRANT AND WALLOWA COUNTIES. BREEZY
TO LOCALLY WINDY CONDITIONS WILL BE POSSIBLE ACROSS THE AREA BOTH
TODAY AND THURSDAY. 90


.LONG TERM...THURSDAY NIGHT THROUGH WEDNESDAY...A SYSTEM WILL BE
MOVING OUT OF THE AREA THURSDAY NIGHT. LINGERING INSTABILITY SHOULD
LEAD TO A CHANCE OF RAIN SHOWERS OVER MOST OF THE AREA THOUGH THE
WASHINGTON COLUMBIA BASIN WILL BE MAINLY DRY WEST OF THE TRI-CITIES.
THE INSTABILITY WILL LEAD TO A CHANCE OF A FEW THUNDERSTORMS IN THE
EARLY EVENING OVER THE EASTERN MOUNTAINS. FRIDAY WILL SEE A TROUGH
REMAINING OVER THE AREA AND ONCE AGAIN MOST OF THE AREA WILL HAVE A
CHANCE OF RAIN SHOWERS AND MOUNTAINS SNOW SHOWERS ABOVE 4000 FEET
THROUGH THE DAY THOUGH THE WASHINGTON COLUMBIA BASIN WILL ONLY HAVE
A SLIGHT CHANCE OF RAIN SHOWERS. THE TROUGH WILL REMAIN FRIDAY NIGHT
AND SATURDAY THOUGH MOST OF THE ENERGY WILL SINK FAR TO OUR SOUTH.
THIS WILL ALLOW THE LOWER ELEVATIONS TO DRY OUT WHILE THE MOUNTAINS
MAINTAIN A CHANCE OF RAIN AND SNOW SHOWERS WITH THE SNOW LEVEL AT
4000 TO 4500 FEET. THE TROUGH LEAVES TO THE EAST SATURDAY NIGHT AS
ANOTHER SYSTEM APPROACHES THE COAST. MODELS DIFFER AS TO THE
STRENGTH AND TIMING OF WHEN IT MOVES THROUGH THE AREA. HAVE KEPT THE
CURRENT FORECAST OF A SLIGHT CHANCE OF RAIN IN THE LOWER ELEVATIONS
AND A CHANCE OF RAIN IN THE MOUNTAINS SATURDAY NIGHT AND SUNDAY THEN
DRYING OUT IN THE LOWER ELEVATIONS SUNDAY NIGHT AND MONDAY. RIDGING
BUILDS OVER THE AREA MONDAY THROUGH MONDAY NIGHT WITH A WEAK SYSTEM
RIDING OVER THE RIDGE AND PERHAPS BRUSHING THE WASHINGTON CASCADE
CREST WITH A SLIGHT CHANCE OF RAIN SHOWERS. MODELS DIVERGE AT THIS
POINT WITH THE ECMWF MAINTAINING A RIDGE THROUGH WEDNESDAY FOR MORE
DRY WEATHER WHILE THE GFS PUSHES THE RIDGE OFF TO THE EAST AND SENDS
A SYSTEM THROUGH THE AREA TUESDAY NIGHT AND WEDNESDAY. HAVE LEANED
TOWARDS THE ECMWF AND HAVE A DRY FORECAST THROUGH THURSDAY. PERRY

&&

.AVIATION...12Z TAFS...A WEAK DISTURBANCE AND A MOIST WESTERLY FLOW
WILL GIVE THE AREA BROKEN TO OVERCAST SKIES TODAY WITH A CHANCE OF
MOSTLY LIGHT RAIN SHOWERS. VFR CONDITION WILL BE PREVALENT THOUGH
THE HEAVIER SHOWERS MAY DETERIORATE TO MVFR LEVELS BRIEFLY. THIS
EVENING A SYSTEM WILL ARRIVE AND PUSH A WARM FRONT INTO THE AREA
AFTER 00Z WITH MORE WIDESPREAD RAIN AND SOMEWHAT LOWER CEILINGS.
HAVE KEPT CIGS AT VFR LEVELS BUT MVFR/IFR CHANCES WILL BE GREATER
WITH THIS SYSTEM THAN EARLIER TODAY. WINDS WILL INCREASE LATER THIS
MORNING TO 10 TO 20 KTS WITH GUSTS TO 30 KTS THEN DROP BELOW 15 KTS
AFTER 03Z. THIS EVENING. PERRY

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  58  45  61  41 /  50  60  70  60
ALW  57  48  61  44 /  60  60  80  60
PSC  63  49  66  47 /  30  60  60  20
YKM  59  43  62  38 /  20  50  50  20
HRI  62  47  65  44 /  30  60  60  40
ELN  58  41  60  36 /  20  50  60  20
RDM  56  38  58  32 /  30  60  50  60
LGD  55  44  56  38 /  50  70  80  70
GCD  55  39  57  36 /  40  60  80  70
DLS  59  46  63  42 /  50  70  60  40

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...NONE.
WA...NONE.
&&

THREAT INDEX
TODAY : GREEN
THURSDAY : GREEN
FRIDAY : GREEN

GREEN: NONE OR LIMITED NEED FOR WATCHES, WARNINGS, OR ADVISORIES.
YELLOW: A FEW WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.
RED: NUMEROUS WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

90/83/83








000
FXUS66 KPDT 231201 AAA
AFDPDT

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE PENDLETON OR
500 AM PDT WED APR 23 2014

UPDATED AVIATION DISCUSSION

.SHORT TERM...TODAY THROUGH THURSDAY EVENING...A WEAK DISTURBANCE
WILL MOVE EAST ACROSS THE REGION THIS MORNING CAUSING VARYING
CHANCES OF SHOWERS. THE BEST CHANCES WILL BE OVER AND NEAR THE
MOUNTAINS, ESPECIALLY IN UPSLOPE AND SLOP OVER FAVORED AREAS. AN
ONSHORE LOW LEVEL FLOW WILL CONTINUE THE CHANCES OF SHOWERS, THOUGH
PROBABILITIES WILL BE SLIGHTLY LOWER THAN THIS MORNING. A STRONGER
SYSTEM WILL APPROACH THE PACIFIC NORTHWEST THIS EVENING. THIS SYSTEM
WILL SWING A WARM FRONT ACROSS THE REGION OVERNIGHT THROUGH MID
MORNING THURSDAY. AS SUCH WILL CONTINUE CURRENT HIGH CHANCES OF
PRECIP FOR LATE TONIGHT INTO THURSDAY MORNING. WILL INDICATE
POST-FRONTAL LOWER POPS IN THE LEE OF THE CASCADES THURSDAY MORNING
DUE TO DOWNSLOPE AFFECTS. THIS WARM FRONT WILL CAUSE SNOW LEVELS TO
RISE TONIGHT INTO THURSDAY. THIS STRONGER SYSTEM`S COLD FRONT IS
EXPECTED TO MOVE ACROSS THE REGION THURSDAY AFTERNOON AND EVENING.
EXPECT SHOWERS TO ACCOMPANY THIS COLD FRONT. MAY ALSO SEE A FEW
THUNDERSTORMS DEVELOP ALONG THIS BOUNDARY LATE AFTERNOON INTO EARLY
EVENING OVER THE BLUE MOUNTAINS AND THEIR ADJACENT FOOTHILLS, THE
GRANDE RONDE VALLEY, AS WELL AS GRANT AND WALLOWA COUNTIES. BREEZY
TO LOCALLY WINDY CONDITIONS WILL BE POSSIBLE ACROSS THE AREA BOTH
TODAY AND THURSDAY. 90


.LONG TERM...THURSDAY NIGHT THROUGH WEDNESDAY...A SYSTEM WILL BE
MOVING OUT OF THE AREA THURSDAY NIGHT. LINGERING INSTABILITY SHOULD
LEAD TO A CHANCE OF RAIN SHOWERS OVER MOST OF THE AREA THOUGH THE
WASHINGTON COLUMBIA BASIN WILL BE MAINLY DRY WEST OF THE TRI-CITIES.
THE INSTABILITY WILL LEAD TO A CHANCE OF A FEW THUNDERSTORMS IN THE
EARLY EVENING OVER THE EASTERN MOUNTAINS. FRIDAY WILL SEE A TROUGH
REMAINING OVER THE AREA AND ONCE AGAIN MOST OF THE AREA WILL HAVE A
CHANCE OF RAIN SHOWERS AND MOUNTAINS SNOW SHOWERS ABOVE 4000 FEET
THROUGH THE DAY THOUGH THE WASHINGTON COLUMBIA BASIN WILL ONLY HAVE
A SLIGHT CHANCE OF RAIN SHOWERS. THE TROUGH WILL REMAIN FRIDAY NIGHT
AND SATURDAY THOUGH MOST OF THE ENERGY WILL SINK FAR TO OUR SOUTH.
THIS WILL ALLOW THE LOWER ELEVATIONS TO DRY OUT WHILE THE MOUNTAINS
MAINTAIN A CHANCE OF RAIN AND SNOW SHOWERS WITH THE SNOW LEVEL AT
4000 TO 4500 FEET. THE TROUGH LEAVES TO THE EAST SATURDAY NIGHT AS
ANOTHER SYSTEM APPROACHES THE COAST. MODELS DIFFER AS TO THE
STRENGTH AND TIMING OF WHEN IT MOVES THROUGH THE AREA. HAVE KEPT THE
CURRENT FORECAST OF A SLIGHT CHANCE OF RAIN IN THE LOWER ELEVATIONS
AND A CHANCE OF RAIN IN THE MOUNTAINS SATURDAY NIGHT AND SUNDAY THEN
DRYING OUT IN THE LOWER ELEVATIONS SUNDAY NIGHT AND MONDAY. RIDGING
BUILDS OVER THE AREA MONDAY THROUGH MONDAY NIGHT WITH A WEAK SYSTEM
RIDING OVER THE RIDGE AND PERHAPS BRUSHING THE WASHINGTON CASCADE
CREST WITH A SLIGHT CHANCE OF RAIN SHOWERS. MODELS DIVERGE AT THIS
POINT WITH THE ECMWF MAINTAINING A RIDGE THROUGH WEDNESDAY FOR MORE
DRY WEATHER WHILE THE GFS PUSHES THE RIDGE OFF TO THE EAST AND SENDS
A SYSTEM THROUGH THE AREA TUESDAY NIGHT AND WEDNESDAY. HAVE LEANED
TOWARDS THE ECMWF AND HAVE A DRY FORECAST THROUGH THURSDAY. PERRY

&&

.AVIATION...12Z TAFS...A WEAK DISTURBANCE AND A MOIST WESTERLY FLOW
WILL GIVE THE AREA BROKEN TO OVERCAST SKIES TODAY WITH A CHANCE OF
MOSTLY LIGHT RAIN SHOWERS. VFR CONDITION WILL BE PREVALENT THOUGH
THE HEAVIER SHOWERS MAY DETERIORATE TO MVFR LEVELS BRIEFLY. THIS
EVENING A SYSTEM WILL ARRIVE AND PUSH A WARM FRONT INTO THE AREA
AFTER 00Z WITH MORE WIDESPREAD RAIN AND SOMEWHAT LOWER CEILINGS.
HAVE KEPT CIGS AT VFR LEVELS BUT MVFR/IFR CHANCES WILL BE GREATER
WITH THIS SYSTEM THAN EARLIER TODAY. WINDS WILL INCREASE LATER THIS
MORNING TO 10 TO 20 KTS WITH GUSTS TO 30 KTS THEN DROP BELOW 15 KTS
AFTER 03Z. THIS EVENING. PERRY

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  58  45  61  41 /  50  60  70  60
ALW  57  48  61  44 /  60  60  80  60
PSC  63  49  66  47 /  30  60  60  20
YKM  59  43  62  38 /  20  50  50  20
HRI  62  47  65  44 /  30  60  60  40
ELN  58  41  60  36 /  20  50  60  20
RDM  56  38  58  32 /  30  60  50  60
LGD  55  44  56  38 /  50  70  80  70
GCD  55  39  57  36 /  40  60  80  70
DLS  59  46  63  42 /  50  70  60  40

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...NONE.
WA...NONE.
&&

THREAT INDEX
TODAY : GREEN
THURSDAY : GREEN
FRIDAY : GREEN

GREEN: NONE OR LIMITED NEED FOR WATCHES, WARNINGS, OR ADVISORIES.
YELLOW: A FEW WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.
RED: NUMEROUS WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

90/83/83







000
FXUS66 KPDT 231000
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
300 AM PDT WED APR 23 2014

.SHORT TERM...TODAY THROUGH THURSDAY EVENING...A WEAK DISTURBANCE
WILL MOVE EAST ACROSS THE REGION THIS MORNING CAUSING VARYING
CHANCES OF SHOWERS. THE BEST CHANCES WILL BE OVER AND NEAR THE
MOUNTAINS, ESPECIALLY IN UPSLOPE AND SLOP OVER FAVORED AREAS. AN
ONSHORE LOW LEVEL FLOW WILL CONTINUE THE CHANCES OF SHOWERS, THOUGH
PROBABILITIES WILL BE SLIGHTLY LOWER THAN THIS MORNING. A STRONGER
SYSTEM WILL APPROACH THE PACIFIC NORTHWEST THIS EVENING. THIS SYSTEM
WILL SWING A WARM FRONT ACROSS THE REGION OVERNIGHT THROUGH MID
MORNING THURSDAY. AS SUCH WILL CONTINUE CURRENT HIGH CHANCES OF
PRECIP FOR LATE TONIGHT INTO THURSDAY MORNING. WILL INDICATE
POST-FRONTAL LOWER POPS IN THE LEE OF THE CASCADES THURSDAY MORNING
DUE TO DOWNSLOPE AFFECTS. THIS WARM FRONT WILL CAUSE SNOW LEVELS TO
RISE TONIGHT INTO THURSDAY. THIS STRONGER SYSTEM`S COLD FRONT IS
EXPECTED TO MOVE ACROSS THE REGION THURSDAY AFTERNOON AND EVENING.
EXPECT SHOWERS TO ACCOMPANY THIS COLD FRONT. MAY ALSO SEE A FEW
THUNDERSTORMS DEVELOP ALONG THIS BOUNDARY LATE AFTERNOON INTO EARLY
EVENING OVER THE BLUE MOUNTAINS AND THEIR ADJACENT FOOTHILLS, THE
GRANDE RONDE VALLEY, AS WELL AS GRANT AND WALLOWA COUNTIES. BREEZY
TO LOCALLY WINDY CONDITIONS WILL BE POSSIBLE ACROSS THE AREA BOTH
TODAY AND THURSDAY. 90


.LONG TERM...THURSDAY NIGHT THROUGH WEDNESDAY...A SYSTEM WILL BE
MOVING OUT OF THE AREA THURSDAY NIGHT. LINGERING INSTABILITY SHOULD
LEAD TO A CHANCE OF RAIN SHOWERS OVER MOST OF THE AREA THOUGH THE
WASHINGTON COLUMBIA BASIN WILL BE MAINLY DRY WEST OF THE TRI-CITIES.
THE INSTABILITY WILL LEAD TO A CHANCE OF A FEW THUNDERSTORMS IN THE
EARLY EVENING OVER THE EASTERN MOUNTAINS. FRIDAY WILL SEE A TROUGH
REMAINING OVER THE AREA AND ONCE AGAIN MOST OF THE AREA WILL HAVE A
CHANCE OF RAIN SHOWERS AND MOUNTAINS SNOW SHOWERS ABOVE 4000 FEET
THROUGH THE DAY THOUGH THE WASHINGTON COLUMBIA BASIN WILL ONLY HAVE
A SLIGHT CHANCE OF RAIN SHOWERS. THE TROUGH WILL REMAIN FRIDAY NIGHT
AND SATURDAY THOUGH MOST OF THE ENERGY WILL SINK FAR TO OUR SOUTH.
THIS WILL ALLOW THE LOWER ELEVATIONS TO DRY OUT WHILE THE MOUNTAINS
MAINTAIN A CHANCE OF RAIN AND SNOW SHOWERS WITH THE SNOW LEVEL AT
4000 TO 4500 FEET. THE TROUGH LEAVES TO THE EAST SATURDAY NIGHT AS
ANOTHER SYSTEM APPROACHES THE COAST. MODELS DIFFER AS TO THE
STRENGTH AND TIMING OF WHEN IT MOVES THROUGH THE AREA. HAVE KEPT THE
CURRENT FORECAST OF A SLIGHT CHANCE OF RAIN IN THE LOWER ELEVATIONS
AND A CHANCE OF RAIN IN THE MOUNTAINS SATURDAY NIGHT AND SUNDAY THEN
DRYING OUT IN THE LOWER ELEVATIONS SUNDAY NIGHT AND MONDAY. RIDGING
BUILDS OVER THE AREA MONDAY THROUGH MONDAY NIGHT WITH A WEAK SYSTEM
RIDING OVER THE RIDGE AND PERHAPS BRUSHING THE WASHINGTON CASCADE
CREST WITH A SLIGHT CHANCE OF RAIN SHOWERS. MODELS DIVERGE AT THIS
POINT WITH THE ECMWF MAINTAINING A RIDGE THROUGH WEDNESDAY FOR MORE
DRY WEATHER WHILE THE GFS PUSHES THE RIDGE OFF TO THE EAST AND SENDS
A SYSTEM THROUGH THE AREA TUESDAY NIGHT AND WEDNESDAY. HAVE LEANED
TOWARDS THE ECMWF AND HAVE A DRY FORECAST THROUGH THURSDAY. PERRY

&&

.AVIATION...PREVIOUS DISCUSSION...06Z TAFS...MAINLY VFR CONDITIONS
WILL PREVAIL DURING THE NEXT 24 HOURS. THERE COULD BE BRIEF PERIODS
OF MVFR OR IFR IN RAIN SHOWERS DURING THE DAY WEDNESDAY. WINDS WILL
CONTINUE TO DIMINISH OVERNIGHT BUT THEN THEY WILL INCREASE AGAIN ON
WEDNESDAY TO MOSTLY 10 TO 20 KTS AND POSSIBLY 15 TO 25 KTS AT TIMES
IN THE AFTERNOON. 88


&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  58  45  61  41 /  50  60  70  60
ALW  57  48  61  44 /  60  60  80  60
PSC  63  49  66  47 /  30  60  60  20
YKM  59  43  62  38 /  20  50  50  20
HRI  62  47  65  44 /  30  60  60  40
ELN  58  41  60  36 /  20  50  60  20
RDM  56  38  58  32 /  30  60  50  60
LGD  55  44  56  38 /  50  70  80  70
GCD  55  39  57  36 /  40  60  80  70
DLS  59  46  63  42 /  50  70  60  40

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...NONE.
WA...NONE.
&&

THREAT INDEX
TODAY : GREEN
THURSDAY : GREEN
FRIDAY : GREEN

GREEN: NONE OR LIMITED NEED FOR WATCHES, WARNINGS, OR ADVISORIES.
YELLOW: A FEW WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.
RED: NUMEROUS WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

90/83/83










000
FXUS66 KPDT 231000
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
300 AM PDT WED APR 23 2014

.SHORT TERM...TODAY THROUGH THURSDAY EVENING...A WEAK DISTURBANCE
WILL MOVE EAST ACROSS THE REGION THIS MORNING CAUSING VARYING
CHANCES OF SHOWERS. THE BEST CHANCES WILL BE OVER AND NEAR THE
MOUNTAINS, ESPECIALLY IN UPSLOPE AND SLOP OVER FAVORED AREAS. AN
ONSHORE LOW LEVEL FLOW WILL CONTINUE THE CHANCES OF SHOWERS, THOUGH
PROBABILITIES WILL BE SLIGHTLY LOWER THAN THIS MORNING. A STRONGER
SYSTEM WILL APPROACH THE PACIFIC NORTHWEST THIS EVENING. THIS SYSTEM
WILL SWING A WARM FRONT ACROSS THE REGION OVERNIGHT THROUGH MID
MORNING THURSDAY. AS SUCH WILL CONTINUE CURRENT HIGH CHANCES OF
PRECIP FOR LATE TONIGHT INTO THURSDAY MORNING. WILL INDICATE
POST-FRONTAL LOWER POPS IN THE LEE OF THE CASCADES THURSDAY MORNING
DUE TO DOWNSLOPE AFFECTS. THIS WARM FRONT WILL CAUSE SNOW LEVELS TO
RISE TONIGHT INTO THURSDAY. THIS STRONGER SYSTEM`S COLD FRONT IS
EXPECTED TO MOVE ACROSS THE REGION THURSDAY AFTERNOON AND EVENING.
EXPECT SHOWERS TO ACCOMPANY THIS COLD FRONT. MAY ALSO SEE A FEW
THUNDERSTORMS DEVELOP ALONG THIS BOUNDARY LATE AFTERNOON INTO EARLY
EVENING OVER THE BLUE MOUNTAINS AND THEIR ADJACENT FOOTHILLS, THE
GRANDE RONDE VALLEY, AS WELL AS GRANT AND WALLOWA COUNTIES. BREEZY
TO LOCALLY WINDY CONDITIONS WILL BE POSSIBLE ACROSS THE AREA BOTH
TODAY AND THURSDAY. 90


.LONG TERM...THURSDAY NIGHT THROUGH WEDNESDAY...A SYSTEM WILL BE
MOVING OUT OF THE AREA THURSDAY NIGHT. LINGERING INSTABILITY SHOULD
LEAD TO A CHANCE OF RAIN SHOWERS OVER MOST OF THE AREA THOUGH THE
WASHINGTON COLUMBIA BASIN WILL BE MAINLY DRY WEST OF THE TRI-CITIES.
THE INSTABILITY WILL LEAD TO A CHANCE OF A FEW THUNDERSTORMS IN THE
EARLY EVENING OVER THE EASTERN MOUNTAINS. FRIDAY WILL SEE A TROUGH
REMAINING OVER THE AREA AND ONCE AGAIN MOST OF THE AREA WILL HAVE A
CHANCE OF RAIN SHOWERS AND MOUNTAINS SNOW SHOWERS ABOVE 4000 FEET
THROUGH THE DAY THOUGH THE WASHINGTON COLUMBIA BASIN WILL ONLY HAVE
A SLIGHT CHANCE OF RAIN SHOWERS. THE TROUGH WILL REMAIN FRIDAY NIGHT
AND SATURDAY THOUGH MOST OF THE ENERGY WILL SINK FAR TO OUR SOUTH.
THIS WILL ALLOW THE LOWER ELEVATIONS TO DRY OUT WHILE THE MOUNTAINS
MAINTAIN A CHANCE OF RAIN AND SNOW SHOWERS WITH THE SNOW LEVEL AT
4000 TO 4500 FEET. THE TROUGH LEAVES TO THE EAST SATURDAY NIGHT AS
ANOTHER SYSTEM APPROACHES THE COAST. MODELS DIFFER AS TO THE
STRENGTH AND TIMING OF WHEN IT MOVES THROUGH THE AREA. HAVE KEPT THE
CURRENT FORECAST OF A SLIGHT CHANCE OF RAIN IN THE LOWER ELEVATIONS
AND A CHANCE OF RAIN IN THE MOUNTAINS SATURDAY NIGHT AND SUNDAY THEN
DRYING OUT IN THE LOWER ELEVATIONS SUNDAY NIGHT AND MONDAY. RIDGING
BUILDS OVER THE AREA MONDAY THROUGH MONDAY NIGHT WITH A WEAK SYSTEM
RIDING OVER THE RIDGE AND PERHAPS BRUSHING THE WASHINGTON CASCADE
CREST WITH A SLIGHT CHANCE OF RAIN SHOWERS. MODELS DIVERGE AT THIS
POINT WITH THE ECMWF MAINTAINING A RIDGE THROUGH WEDNESDAY FOR MORE
DRY WEATHER WHILE THE GFS PUSHES THE RIDGE OFF TO THE EAST AND SENDS
A SYSTEM THROUGH THE AREA TUESDAY NIGHT AND WEDNESDAY. HAVE LEANED
TOWARDS THE ECMWF AND HAVE A DRY FORECAST THROUGH THURSDAY. PERRY

&&

.AVIATION...PREVIOUS DISCUSSION...06Z TAFS...MAINLY VFR CONDITIONS
WILL PREVAIL DURING THE NEXT 24 HOURS. THERE COULD BE BRIEF PERIODS
OF MVFR OR IFR IN RAIN SHOWERS DURING THE DAY WEDNESDAY. WINDS WILL
CONTINUE TO DIMINISH OVERNIGHT BUT THEN THEY WILL INCREASE AGAIN ON
WEDNESDAY TO MOSTLY 10 TO 20 KTS AND POSSIBLY 15 TO 25 KTS AT TIMES
IN THE AFTERNOON. 88


&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  58  45  61  41 /  50  60  70  60
ALW  57  48  61  44 /  60  60  80  60
PSC  63  49  66  47 /  30  60  60  20
YKM  59  43  62  38 /  20  50  50  20
HRI  62  47  65  44 /  30  60  60  40
ELN  58  41  60  36 /  20  50  60  20
RDM  56  38  58  32 /  30  60  50  60
LGD  55  44  56  38 /  50  70  80  70
GCD  55  39  57  36 /  40  60  80  70
DLS  59  46  63  42 /  50  70  60  40

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...NONE.
WA...NONE.
&&

THREAT INDEX
TODAY : GREEN
THURSDAY : GREEN
FRIDAY : GREEN

GREEN: NONE OR LIMITED NEED FOR WATCHES, WARNINGS, OR ADVISORIES.
YELLOW: A FEW WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.
RED: NUMEROUS WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

90/83/83









000
FXUS66 KPDT 230257
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
757 PM PDT TUE APR 22 2014

.UPDATE...THE FORECAST AREA IS CURRENTLY IN A BREAK IN THE WEATHER
WITH THE NEXT SYSTEM MOVING INTO THE PACIFIC NORTHWEST WEST OF THE
CASCADES. RADAR IMAGERY IS SHOWING PRECIPITATION TO BE INCREASING
WEST OF THE CASCADES. THIS PRECIPITATION WILL MOVE EAST OF THE
CASCADES OVERNIGHT AND ON WEDNESDAY MORNING BRINGING MAINLY RAIN
SHOWERS TO THE CWA. THIS SYSTEM WILL EXIT THE FORECAST AREA BY
WEDNESDAY AFTERNOON BUT WILL BE QUICKLY FOLLOWED BY ANOTHER WEATHER
SYSTEM FOR WEDNESDAY NIGHT INTO THURSDAY. A WARM FRONT WILL MOVE
NORTH ACROSS THE CWA WEDNESDAY EVENING AND THEN A COLD FRONT WILL
FOLLOW ON THURSDAY MORNING. PRECIPITATION TYPE WITH THESE TWO
SYSTEMS WILL BE PRIMARILY RAIN BUT THERE MAY BE SOME WET SNOW IN THE
HIGHEST ELEVATIONS OF THE NORTHEAST MOUNTAINS AND THE CASCADES. IT
WILL ALSO BECOME BREEZY AT TIMES AS THESE SYSTEMS PASS OVER THE
AREA. THE WEATHER PATTERN WILL REMAIN UNSETTLED WITH FREQUENT
WEATHER SYSTEMS THROUGH THE WEEKEND INTO EARLY NEXT WEEK. 88

&&

.AVIATION...06Z TAFS...MAINLY VFR CONDITIONS WILL PREVAIL DURING THE
NEXT 24 HOURS. THERE COULD BE BRIEF PERIODS OF MVFR OR IFR IN RAIN
SHOWERS DURING THE DAY WEDNESDAY. WINDS WILL CONTINUE TO DIMINISH
OVERNIGHT BUT THEN THEY WILL INCREASE AGAIN ON WEDNESDAY TO MOSTLY
10 TO 20 KTS AND POSSIBLY 15 TO 25 KTS AT TIMES IN THE AFTERNOON. 88

&&

.PREV DISC... /ISSUED 440 PM PDT TUE APR 22 2014/

SHORT TERM...TONIGHT THROUGH THURSDAY. AN ACTIVE WEATHER PATTERN IS
EXPECTED FOR THE NEXT FEW DAYS. SHOWERS WILL PERSIST ON AND OFF AND
AS ONE STORM SYSTEM EXITS THE REGION TODAY LEAVING SOME SHOWERS AND
WINDY CONDITIONS BEHIND IT...ANOTHER SYSTEM WILL REPLACE IT TONIGHT
KEEPING THE THREAT FOR SHOWERS IN THE FORECAST INTO WEDNESDAY. A
STRONGER SYSTEM MOVES INTO THE REGION WEDNESDAY NIGHT AND RAIN
CHANCES WILL INCREASE. ALSO THE ATMOSPHERE BECOMES INCREASINGLY
UNSTABLE THURSDAY AFTERNOON AND AN ISOLATED THUNDERSTORM IS POSSIBLE
MAINLY OVER THE EASTERN THIRD OF THE AREA THAT INCLUDES THE
BLUES/WALLOWAS. SNOW LEVELS WILL BE A CHALLENGE FLUCTUATING FROM
3500 FEET TO 4500 FEET AND THERE REMAINS SOME CHANCE FOR EITHER A
MIXTURE OF RAIN AND SNOW OR MAINLY SNOW WITH MINOR ACCUMULATIONS
ACROSS THE HIGHER ELEVATIONS. TEMPERATURES WILL REMAIN SLIGHTLY
BELOW NORMAL THROUGH THE PERIOD.

LONG TERM...FRIDAY THROUGH TUESDAY...A HIGH AMPLITUDE UPPER LEVEL
TROUGH WILL BE ALONG THE COAST FRIDAY SETTING UP A BROAD SOUTHERLY
FLOW ALOFT OVER FORECAST AREA. 500 MB TEMPERATURES OF -25C TO -30C
WILL FAVOR STEEP LAPSE RATES LEADING TO A MARGINAL UNSTABLE
ATMOSPHERE FRIDAY AFTERNOON FOR SHOWERS LIKELY. THE 12Z ECMWF SHOWS
CAPE OF 300 J/KG FRIDAY AFTERNOON OVER THE EASTERN OREGON MOUNTAINS.
I THEREFORE ADDED A SLIGHT CHANCE OF THUNDERSTORMS FOR FRIDAY
AFTERNOON. IN ADDITION, BOTH THE 12Z GFS AND THE 12Z ECMWF RUNS
INDICATE DYNAMIC LIFT OVER EASTERN LIFT FOR STRONG FORCING ALONG
WITH VERTICAL WIND SHEAR AROUND 40 KTS. FRIDAY NIGHT THE TROUGH
MOVES OVER THE REGION FOR A CHANCE OF SHOWERS MAINLY OVER MOUNTAINS.
SATURDAY THE TROUGH REMAINS OVER FORECAST AREA WHILE THE NEXT
UPSTREAM SHORT WAVE APPROACHES THE COAST SATURDAY AFTERNOON WITH AN
ATTENDANT COLD FRONT. THE SHORT WAVE MOVES ACROSS FORECAST AREA
SATURDAY NIGHT/SUNDAY SWEEPING THE COLD FRONT INTO IDAHO/MONTANA
SATURDAY NIGHT, THUS KEEPING A CHANCE OF SHOWERS IN THE EASTERN
MOUNTAINS AND ALONG THE EAST SLOPES OF THE CASCADES. SUNDAY/SUNDAY
NIGHT INTO MONDAY A WARM FRONT BRING RAIN INTO THE FORECAST AREA
WITH THE BEST CHANCE OF RAIN IN THE MOUNTAINS WITH SNOW LEVELS OF
4500-5500 FEET. MONDAY NIGHT AND TUESDAY A RIDGE OF HIGH PRESSURE
BUILDS OVER THE REGION FOR DRY CONDITIONS.  POLAN

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  39  58  44  60 /  30  30  60  60
ALW  43  57  46  60 /  30  30  60  70
PSC  43  63  49  65 /  20  30  50  60
YKM  37  59  40  60 /  20  20  50  60
HRI  41  62  46  64 /  30  30  60  60
ELN  38  58  39  60 /  20  20  60  60
RDM  31  55  37  55 /  30  30  60  50
LGD  36  53  40  55 /  30  40  70  80
GCD  33  54  36  52 /  30  40  60  70
DLS  42  61  46  60 /  30  40  70  70

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...NONE.
WA...NONE.

&&

THREAT INDEX
WEDNESDAY : GREEN
THURSDAY : GREEN
FRIDAY : GREEN

GREEN: NONE OR LIMITED NEED FOR WATCHES, WARNINGS, OR ADVISORIES.
YELLOW: A FEW WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.
RED: NUMEROUS WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

88/99/88









000
FXUS66 KPDT 230257
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
757 PM PDT TUE APR 22 2014

.UPDATE...THE FORECAST AREA IS CURRENTLY IN A BREAK IN THE WEATHER
WITH THE NEXT SYSTEM MOVING INTO THE PACIFIC NORTHWEST WEST OF THE
CASCADES. RADAR IMAGERY IS SHOWING PRECIPITATION TO BE INCREASING
WEST OF THE CASCADES. THIS PRECIPITATION WILL MOVE EAST OF THE
CASCADES OVERNIGHT AND ON WEDNESDAY MORNING BRINGING MAINLY RAIN
SHOWERS TO THE CWA. THIS SYSTEM WILL EXIT THE FORECAST AREA BY
WEDNESDAY AFTERNOON BUT WILL BE QUICKLY FOLLOWED BY ANOTHER WEATHER
SYSTEM FOR WEDNESDAY NIGHT INTO THURSDAY. A WARM FRONT WILL MOVE
NORTH ACROSS THE CWA WEDNESDAY EVENING AND THEN A COLD FRONT WILL
FOLLOW ON THURSDAY MORNING. PRECIPITATION TYPE WITH THESE TWO
SYSTEMS WILL BE PRIMARILY RAIN BUT THERE MAY BE SOME WET SNOW IN THE
HIGHEST ELEVATIONS OF THE NORTHEAST MOUNTAINS AND THE CASCADES. IT
WILL ALSO BECOME BREEZY AT TIMES AS THESE SYSTEMS PASS OVER THE
AREA. THE WEATHER PATTERN WILL REMAIN UNSETTLED WITH FREQUENT
WEATHER SYSTEMS THROUGH THE WEEKEND INTO EARLY NEXT WEEK. 88

&&

.AVIATION...06Z TAFS...MAINLY VFR CONDITIONS WILL PREVAIL DURING THE
NEXT 24 HOURS. THERE COULD BE BRIEF PERIODS OF MVFR OR IFR IN RAIN
SHOWERS DURING THE DAY WEDNESDAY. WINDS WILL CONTINUE TO DIMINISH
OVERNIGHT BUT THEN THEY WILL INCREASE AGAIN ON WEDNESDAY TO MOSTLY
10 TO 20 KTS AND POSSIBLY 15 TO 25 KTS AT TIMES IN THE AFTERNOON. 88

&&

.PREV DISC... /ISSUED 440 PM PDT TUE APR 22 2014/

SHORT TERM...TONIGHT THROUGH THURSDAY. AN ACTIVE WEATHER PATTERN IS
EXPECTED FOR THE NEXT FEW DAYS. SHOWERS WILL PERSIST ON AND OFF AND
AS ONE STORM SYSTEM EXITS THE REGION TODAY LEAVING SOME SHOWERS AND
WINDY CONDITIONS BEHIND IT...ANOTHER SYSTEM WILL REPLACE IT TONIGHT
KEEPING THE THREAT FOR SHOWERS IN THE FORECAST INTO WEDNESDAY. A
STRONGER SYSTEM MOVES INTO THE REGION WEDNESDAY NIGHT AND RAIN
CHANCES WILL INCREASE. ALSO THE ATMOSPHERE BECOMES INCREASINGLY
UNSTABLE THURSDAY AFTERNOON AND AN ISOLATED THUNDERSTORM IS POSSIBLE
MAINLY OVER THE EASTERN THIRD OF THE AREA THAT INCLUDES THE
BLUES/WALLOWAS. SNOW LEVELS WILL BE A CHALLENGE FLUCTUATING FROM
3500 FEET TO 4500 FEET AND THERE REMAINS SOME CHANCE FOR EITHER A
MIXTURE OF RAIN AND SNOW OR MAINLY SNOW WITH MINOR ACCUMULATIONS
ACROSS THE HIGHER ELEVATIONS. TEMPERATURES WILL REMAIN SLIGHTLY
BELOW NORMAL THROUGH THE PERIOD.

LONG TERM...FRIDAY THROUGH TUESDAY...A HIGH AMPLITUDE UPPER LEVEL
TROUGH WILL BE ALONG THE COAST FRIDAY SETTING UP A BROAD SOUTHERLY
FLOW ALOFT OVER FORECAST AREA. 500 MB TEMPERATURES OF -25C TO -30C
WILL FAVOR STEEP LAPSE RATES LEADING TO A MARGINAL UNSTABLE
ATMOSPHERE FRIDAY AFTERNOON FOR SHOWERS LIKELY. THE 12Z ECMWF SHOWS
CAPE OF 300 J/KG FRIDAY AFTERNOON OVER THE EASTERN OREGON MOUNTAINS.
I THEREFORE ADDED A SLIGHT CHANCE OF THUNDERSTORMS FOR FRIDAY
AFTERNOON. IN ADDITION, BOTH THE 12Z GFS AND THE 12Z ECMWF RUNS
INDICATE DYNAMIC LIFT OVER EASTERN LIFT FOR STRONG FORCING ALONG
WITH VERTICAL WIND SHEAR AROUND 40 KTS. FRIDAY NIGHT THE TROUGH
MOVES OVER THE REGION FOR A CHANCE OF SHOWERS MAINLY OVER MOUNTAINS.
SATURDAY THE TROUGH REMAINS OVER FORECAST AREA WHILE THE NEXT
UPSTREAM SHORT WAVE APPROACHES THE COAST SATURDAY AFTERNOON WITH AN
ATTENDANT COLD FRONT. THE SHORT WAVE MOVES ACROSS FORECAST AREA
SATURDAY NIGHT/SUNDAY SWEEPING THE COLD FRONT INTO IDAHO/MONTANA
SATURDAY NIGHT, THUS KEEPING A CHANCE OF SHOWERS IN THE EASTERN
MOUNTAINS AND ALONG THE EAST SLOPES OF THE CASCADES. SUNDAY/SUNDAY
NIGHT INTO MONDAY A WARM FRONT BRING RAIN INTO THE FORECAST AREA
WITH THE BEST CHANCE OF RAIN IN THE MOUNTAINS WITH SNOW LEVELS OF
4500-5500 FEET. MONDAY NIGHT AND TUESDAY A RIDGE OF HIGH PRESSURE
BUILDS OVER THE REGION FOR DRY CONDITIONS.  POLAN

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  39  58  44  60 /  30  30  60  60
ALW  43  57  46  60 /  30  30  60  70
PSC  43  63  49  65 /  20  30  50  60
YKM  37  59  40  60 /  20  20  50  60
HRI  41  62  46  64 /  30  30  60  60
ELN  38  58  39  60 /  20  20  60  60
RDM  31  55  37  55 /  30  30  60  50
LGD  36  53  40  55 /  30  40  70  80
GCD  33  54  36  52 /  30  40  60  70
DLS  42  61  46  60 /  30  40  70  70

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...NONE.
WA...NONE.

&&

THREAT INDEX
WEDNESDAY : GREEN
THURSDAY : GREEN
FRIDAY : GREEN

GREEN: NONE OR LIMITED NEED FOR WATCHES, WARNINGS, OR ADVISORIES.
YELLOW: A FEW WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.
RED: NUMEROUS WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

88/99/88










000
FXUS66 KPDT 222343 AAA
AFDPDT

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE PENDLETON OR
440 PM PDT TUE APR 22 2014

UPDATED AVIATION DISCUSSION

.SHORT TERM...TONIGHT THROUGH THURSDAY. AN ACTIVE WEATHER PATTERN IS
EXPECTED FOR THE NEXT FEW DAYS. SHOWERS WILL PERSIST ON AND OFF AND
AS ONE STORM SYSTEM EXITS THE REGION TODAY LEAVING SOME SHOWERS AND
WINDY CONDITIONS BEHIND IT...ANOTHER SYSTEM WILL REPLACE IT TONIGHT
KEEPING THE THREAT FOR SHOWERS IN THE FORECAST INTO WEDNESDAY. A
STRONGER SYSTEM MOVES INTO THE REGION WEDNESDAY NIGHT AND RAIN
CHANCES WILL INCREASE. ALSO THE ATMOSPHERE BECOMES INCREASINGLY
UNSTABLE THURSDAY AFTERNOON AND AN ISOLATED THUNDERSTORM IS POSSIBLE
MAINLY OVER THE EASTERN THIRD OF THE AREA THAT INCLUDES THE
BLUES/WALLOWAS. SNOW LEVELS WILL BE A CHALLENGE FLUCTUATING FROM
3500 FEET TO 4500 FEET AND THERE REMAINS SOME CHANCE FOR EITHER A
MIXTURE OF RAIN AND SNOW OR MAINLY SNOW WITH MINOR ACCUMULATIONS
ACROSS THE HIGHER ELEVATIONS. TEMPERATURES WILL REMAIN SLIGHTLY
BELOW NORMAL THROUGH THE PERIOD.

.LONG TERM...FRIDAY THROUGH TUESDAY...A HIGH AMPLITUDE UPPER LEVEL
TROUGH WILL BE ALONG THE COAST FRIDAY SETTING UP A BROAD SOUTHERLY
FLOW ALOFT OVER FORECAST AREA. 500 MB TEMPERATURES OF -25C TO -30C
WILL FAVOR STEEP LAPSE RATES LEADING TO A MARGINAL UNSTABLE
ATMOSPHERE FRIDAY AFTERNOON FOR SHOWERS LIKELY. THE 12Z ECMWF SHOWS
CAPE OF 300 J/KG FRIDAY AFTERNOON OVER THE EASTERN OREGON MOUNTAINS.
I THEREFORE ADDED A SLIGHT CHANCE OF THUNDERSTORMS FOR FRIDAY
AFTERNOON. IN ADDITION, BOTH THE 12Z GFS AND THE 12Z ECMWF RUNS
INDICATE DYNAMIC LIFT OVER EASTERN LIFT FOR STRONG FORCING ALONG
WITH VERTICAL WIND SHEAR AROUND 40 KTS. FRIDAY NIGHT THE TROUGH
MOVES OVER THE REGION FOR A CHANCE OF SHOWERS MAINLY OVER MOUNTAINS.
SATURDAY THE TROUGH REMAINS OVER FORECAST AREA WHILE THE NEXT
UPSTREAM SHORT WAVE APPROACHES THE COAST SATURDAY AFTERNOON WITH AN
ATTENDANT COLD FRONT. THE SHORT WAVE MOVES ACROSS FORECAST AREA
SATURDAY NIGHT/SUNDAY SWEEPING THE COLD FRONT INTO IDAHO/MONTANA
SATURDAY NIGHT, THUS KEEPING A CHANCE OF SHOWERS IN THE EASTERN
MOUNTAINS AND ALONG THE EAST SLOPES OF THE CASCADES. SUNDAY/SUNDAY
NIGHT INTO MONDAY A WARM FRONT BRING RAIN INTO THE FORECAST AREA
WITH THE BEST CHANCE OF RAIN IN THE MOUNTAINS WITH SNOW LEVELS OF
4500-5500 FEET. MONDAY NIGHT AND TUESDAY A RIDGE OF HIGH PRESSURE
BUILDS OVER THE REGION FOR DRY CONDITIONS.  POLAN

&&

.AVIATION...00Z TAFS...KPDT RADAR SHOWS A LINE OF SHOWERS A NEAR
KPSC THAT WILL MOVE TO KALW IN THE NEXT TWO HOURS. AS SUCH I ADDED A
TEMPO GROUP UNTIL 02Z IN THE KPSC AND KALW TAFS FOR -SHRA. ANOTHER
LINE OF SHOWERS WILL CROSS THE NORTHERN OREGON CASCADES AND REACH
KDLS BY 00Z, SO I ADDED A TEMPO GROUP IN THE KDLS TAF FOR -SHRA
UNTIL 01Z THIS EVENING. INCREASING MOISTURE AND CLOUDS WILL OCCUR
OVERNIGHT. CLOUD BASES WILL BEGIN LOWERING AND THICKENING LATE THIS
EVENING AND CONTINUE THUS OVERNIGHT DUE TO ANOTHER WEAK DISTURBANCE
IN THE FORM OF A WARM FRONT CROSSING THE FORECAST AREA, BUT CIGS
WILL REMAIN AT VFR LEVELS. MORE SHOWERS WILL DEVELOP AFTER 08Z/23RD
WITH A RAIN/SNOW MIX POSSIBLE AT KRDM AND KBDN. WINDS CURRENTLY ARE
SUSTAINED AROUND 20 KTS AND WILL DIMINISH BY LATE THIS EVENING TO 10
TO 15 KTS. GUSTS TO 30 KTS ARE LIKELY AT KDLS AND KYKM UNTIL 03Z
THIS EVENING. KPDT WILL HAVE GUSTS TO 32 KTS UNTIL 04Z THIS
EVENING.  POLAN

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  39  58  44  60 /  30  30  60  60
ALW  43  57  46  60 /  30  30  60  70
PSC  43  63  49  65 /  20  30  50  60
YKM  37  59  40  60 /  20  20  50  60
HRI  41  62  46  64 /  30  30  60  60
ELN  38  58  39  60 /  20  20  60  60
RDM  31  55  37  55 /  30  30  60  50
LGD  36  53  40  55 /  30  40  70  80
GCD  33  54  36  52 /  30  40  60  70
DLS  42  61  46  60 /  30  40  70  70

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...NONE.
WA...WIND ADVISORY UNTIL 8 PM PDT THIS EVENING WAZ026.

&&

THREAT INDEX
WEDNESDAY : GREEN
THURSDAY : GREEN
FRIDAY : GREEN

GREEN: NONE OR LIMITED NEED FOR WATCHES, WARNINGS, OR ADVISORIES.
YELLOW: A FEW WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.
RED: NUMEROUS WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

97/99/99








000
FXUS66 KPDT 222343 AAA
AFDPDT

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE PENDLETON OR
440 PM PDT TUE APR 22 2014

UPDATED AVIATION DISCUSSION

.SHORT TERM...TONIGHT THROUGH THURSDAY. AN ACTIVE WEATHER PATTERN IS
EXPECTED FOR THE NEXT FEW DAYS. SHOWERS WILL PERSIST ON AND OFF AND
AS ONE STORM SYSTEM EXITS THE REGION TODAY LEAVING SOME SHOWERS AND
WINDY CONDITIONS BEHIND IT...ANOTHER SYSTEM WILL REPLACE IT TONIGHT
KEEPING THE THREAT FOR SHOWERS IN THE FORECAST INTO WEDNESDAY. A
STRONGER SYSTEM MOVES INTO THE REGION WEDNESDAY NIGHT AND RAIN
CHANCES WILL INCREASE. ALSO THE ATMOSPHERE BECOMES INCREASINGLY
UNSTABLE THURSDAY AFTERNOON AND AN ISOLATED THUNDERSTORM IS POSSIBLE
MAINLY OVER THE EASTERN THIRD OF THE AREA THAT INCLUDES THE
BLUES/WALLOWAS. SNOW LEVELS WILL BE A CHALLENGE FLUCTUATING FROM
3500 FEET TO 4500 FEET AND THERE REMAINS SOME CHANCE FOR EITHER A
MIXTURE OF RAIN AND SNOW OR MAINLY SNOW WITH MINOR ACCUMULATIONS
ACROSS THE HIGHER ELEVATIONS. TEMPERATURES WILL REMAIN SLIGHTLY
BELOW NORMAL THROUGH THE PERIOD.

.LONG TERM...FRIDAY THROUGH TUESDAY...A HIGH AMPLITUDE UPPER LEVEL
TROUGH WILL BE ALONG THE COAST FRIDAY SETTING UP A BROAD SOUTHERLY
FLOW ALOFT OVER FORECAST AREA. 500 MB TEMPERATURES OF -25C TO -30C
WILL FAVOR STEEP LAPSE RATES LEADING TO A MARGINAL UNSTABLE
ATMOSPHERE FRIDAY AFTERNOON FOR SHOWERS LIKELY. THE 12Z ECMWF SHOWS
CAPE OF 300 J/KG FRIDAY AFTERNOON OVER THE EASTERN OREGON MOUNTAINS.
I THEREFORE ADDED A SLIGHT CHANCE OF THUNDERSTORMS FOR FRIDAY
AFTERNOON. IN ADDITION, BOTH THE 12Z GFS AND THE 12Z ECMWF RUNS
INDICATE DYNAMIC LIFT OVER EASTERN LIFT FOR STRONG FORCING ALONG
WITH VERTICAL WIND SHEAR AROUND 40 KTS. FRIDAY NIGHT THE TROUGH
MOVES OVER THE REGION FOR A CHANCE OF SHOWERS MAINLY OVER MOUNTAINS.
SATURDAY THE TROUGH REMAINS OVER FORECAST AREA WHILE THE NEXT
UPSTREAM SHORT WAVE APPROACHES THE COAST SATURDAY AFTERNOON WITH AN
ATTENDANT COLD FRONT. THE SHORT WAVE MOVES ACROSS FORECAST AREA
SATURDAY NIGHT/SUNDAY SWEEPING THE COLD FRONT INTO IDAHO/MONTANA
SATURDAY NIGHT, THUS KEEPING A CHANCE OF SHOWERS IN THE EASTERN
MOUNTAINS AND ALONG THE EAST SLOPES OF THE CASCADES. SUNDAY/SUNDAY
NIGHT INTO MONDAY A WARM FRONT BRING RAIN INTO THE FORECAST AREA
WITH THE BEST CHANCE OF RAIN IN THE MOUNTAINS WITH SNOW LEVELS OF
4500-5500 FEET. MONDAY NIGHT AND TUESDAY A RIDGE OF HIGH PRESSURE
BUILDS OVER THE REGION FOR DRY CONDITIONS.  POLAN

&&

.AVIATION...00Z TAFS...KPDT RADAR SHOWS A LINE OF SHOWERS A NEAR
KPSC THAT WILL MOVE TO KALW IN THE NEXT TWO HOURS. AS SUCH I ADDED A
TEMPO GROUP UNTIL 02Z IN THE KPSC AND KALW TAFS FOR -SHRA. ANOTHER
LINE OF SHOWERS WILL CROSS THE NORTHERN OREGON CASCADES AND REACH
KDLS BY 00Z, SO I ADDED A TEMPO GROUP IN THE KDLS TAF FOR -SHRA
UNTIL 01Z THIS EVENING. INCREASING MOISTURE AND CLOUDS WILL OCCUR
OVERNIGHT. CLOUD BASES WILL BEGIN LOWERING AND THICKENING LATE THIS
EVENING AND CONTINUE THUS OVERNIGHT DUE TO ANOTHER WEAK DISTURBANCE
IN THE FORM OF A WARM FRONT CROSSING THE FORECAST AREA, BUT CIGS
WILL REMAIN AT VFR LEVELS. MORE SHOWERS WILL DEVELOP AFTER 08Z/23RD
WITH A RAIN/SNOW MIX POSSIBLE AT KRDM AND KBDN. WINDS CURRENTLY ARE
SUSTAINED AROUND 20 KTS AND WILL DIMINISH BY LATE THIS EVENING TO 10
TO 15 KTS. GUSTS TO 30 KTS ARE LIKELY AT KDLS AND KYKM UNTIL 03Z
THIS EVENING. KPDT WILL HAVE GUSTS TO 32 KTS UNTIL 04Z THIS
EVENING.  POLAN

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  39  58  44  60 /  30  30  60  60
ALW  43  57  46  60 /  30  30  60  70
PSC  43  63  49  65 /  20  30  50  60
YKM  37  59  40  60 /  20  20  50  60
HRI  41  62  46  64 /  30  30  60  60
ELN  38  58  39  60 /  20  20  60  60
RDM  31  55  37  55 /  30  30  60  50
LGD  36  53  40  55 /  30  40  70  80
GCD  33  54  36  52 /  30  40  60  70
DLS  42  61  46  60 /  30  40  70  70

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...NONE.
WA...WIND ADVISORY UNTIL 8 PM PDT THIS EVENING WAZ026.

&&

THREAT INDEX
WEDNESDAY : GREEN
THURSDAY : GREEN
FRIDAY : GREEN

GREEN: NONE OR LIMITED NEED FOR WATCHES, WARNINGS, OR ADVISORIES.
YELLOW: A FEW WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.
RED: NUMEROUS WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

97/99/99







000
FXUS66 KPDT 222139
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
225 PM PDT TUE APR 22 2014

.SHORT TERM...TONIGHT THROUGH THURSDAY. AN ACTIVE WEATHER PATTERN IS
EXPECTED FOR THE NEXT FEW DAYS. SHOWERS WILL PERSIST ON AND OFF AND
AS ONE STORM SYSTEM EXITS THE REGION TODAY LEAVING SOME SHOWERS AND
WINDY CONDITIONS BEHIND IT...ANOTHER SYSTEM WILL REPLACE IT TONIGHT
KEEPING THE THREAT FOR SHOWERS IN THE FORECAST INTO WEDNESDAY. A
STRONGER SYSTEM MOVES INTO THE REGION WEDNESDAY NIGHT AND RAIN
CHANCES WILL INCREASE. ALSO THE ATMOSPHERE BECOMES INCREASINGLY
UNSTABLE THURSDAY AFTERNOON AND AN ISOLATED THUNDERSTORM IS POSSIBLE
MAINLY OVER THE EASTERN THIRD OF THE AREA THAT INCLUDES THE
BLUES/WALLOWAS. SNOW LEVELS WILL BE A CHALLENGE FLUCTUATING FROM
3500 FEET TO 4500 FEET AND THERE REMAINS SOME CHANCE FOR EITHER A
MIXTURE OF RAIN AND SNOW OR MAINLY SNOW WITH MINOR ACCUMULATIONS
ACROSS THE HIGHER ELEVATIONS. TEMPERATURES WILL REMAIN SLIGHTLY
BELOW NORMAL THROUGH THE PERIOD.

.LONG TERM...FRIDAY THROUGH TUESDAY...A HIGH AMPLITUDE UPPER LEVEL
TROUGH WILL BE ALONG THE COAST FRIDAY SETTING UP A BROAD SOUTHERLY
FLOW ALOFT OVER FORECAST AREA. 500 MB TEMPERATURES OF -25C TO -30C
WILL FAVOR STEEP LAPSE RATES LEADING TO A MARGINAL UNSTABLE
ATMOSPHERE FRIDAY AFTERNOON FOR SHOWERS LIKELY. THE 12Z ECMWF SHOWS
CAPE OF 300 J/KG FRIDAY AFTERNOON OVER THE EASTERN OREGON MOUNTAINS.
I THEREFORE ADDED A SLIGHT CHANCE OF THUNDERSTORMS FOR FRIDAY
AFTERNOON. IN ADDITION, BOTH THE 12Z GFS AND THE 12Z ECMWF RUNS
INDICATE DYNAMIC LIFT OVER EASTERN LIFT FOR STRONG FORCING ALONG
WITH VERTICAL WIND SHEAR AROUND 40 KTS. FRIDAY NIGHT THE TROUGH
MOVES OVER THE REGION FOR A CHANCE OF SHOWERS MAINLY OVER MOUNTAINS.
SATURDAY THE TROUGH REMAINS OVER FORECAST AREA WHILE THE NEXT
UPSTREAM SHORT WAVE APPROACHES THE COAST SATURDAY AFTERNOON WITH AN
ATTENDANT COLD FRONT. THE SHORT WAVE MOVES ACROSS FORECAST AREA
SATURDAY NIGHT/SUNDAY SWEEPING THE COLD FRONT INTO IDAHO/MONTANA
SATURDAY NIGHT, THUS KEEPING A CHANCE OF SHOWERS IN THE EASTERN
MOUNTAINS AND ALONG THE EAST SLOPES OF THE CASCADES. SUNDAY/SUNDAY
NIGHT INTO MONDAY A WARM FRONT BRING RAIN INTO THE FORECAST AREA
WITH THE BEST CHANCE OF RAIN IN THE MOUNTAINS WITH SNOW LEVELS OF
4500-5500 FEET. MONDAY NIGHT AND TUESDAY A RIDGE OF HIGH PRESSURE
BUILDS OVER THE REGION FOR DRY CONDITIONS.  POLAN

&&

.PREVIOUS AVIATION DISCUSSION...18 TAFS...KPDT RADAR SHOWS RAIN AREA
CONTRACTING IN THE EASTERN SECTIONS OF THE LOWER COLUMBIA BASIN AND
MOVING EAST SUCH THAT RAIN WILL LIKELY END BY 19Z-20Z AT KPSC, KALW
AND KPDT. MVFR CIGS WILL CONTINUE AT KALW UNTIL THEN AND VSBY AT
KALW MAY BRIEFLY BE REDUCED TO IFR WITH THE HEAVIER SHOWERS. -SN
WILL CONTINUE OVER THE BLUE MOUNTAINS FOR A FEW MORE HOURS SO EXPECT
MVFR VSBY AND CIGS ALONG THE AVIATION ROUTE FROM KPDT TO KBKE UNTIL
AROUND 20Z.

VISIBLE SATELLITE IMAGERY SHOWS TREND OF PARTIAL CLEARING AND
THINNING OF CLOUDS IN WESTERN SECTIONS OF THE LOWER COLUMBIA BASIN
SO CLOUD BASES WILL LIFT AND GO FROM BKN TO SCT THIS AFTERNOON IN
THE BASIN. THIS AFTERNOON CIGS WILL BECOME MAINLY SCT (BUT REMAIN
BKN AT KALW) ABOVE 5000 FT AGL. CIGS WILL BEGIN LOWERING LATE THIS
EVENING AND OVERNIGHT DUE TO ANOTHER WEAK DISTURBANCE CROSSING THE
FORECAST AREA, BUT CIGS WILL REMAIN AT VFR LEVELS. MORE SHOWERS WILL
DEVELOP AFTER 06Z WITH A RAIN/SNOW MIX POSSIBLE AT KRDM AND KBDN.
WINDS WILL INCREASE THIS MORNING AND REACH 15 TO 25 KTS WITH GUSTS
TO 35 KTS THIS AFTERNOON THEN DECREASE TO 5 TO 15 KTS WITH GUSTS TO
20 KTS AFTER 06Z TONIGHT.  POLAN

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  39  58  44  60 /  30  30  60  60
ALW  43  57  46  60 /  30  30  60  70
PSC  43  63  49  65 /  20  30  50  60
YKM  37  59  40  60 /  20  20  50  60
HRI  41  62  46  64 /  30  30  60  60
ELN  38  58  39  60 /  20  20  60  60
RDM  31  55  37  55 /  30  30  60  50
LGD  36  53  40  55 /  30  40  70  80
GCD  33  54  36  52 /  30  40  60  70
DLS  42  61  46  60 /  30  40  70  70

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...NONE.
WA...WIND ADVISORY UNTIL 8 PM PDT THIS EVENING WAZ026.

&&

THREAT INDEX
WEDNESDAY : GREEN
THURSDAY : GREEN
FRIDAY : GREEN

GREEN: NONE OR LIMITED NEED FOR WATCHES, WARNINGS, OR ADVISORIES.
YELLOW: A FEW WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.
RED: NUMEROUS WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

97/99/99









000
FXUS66 KPDT 222139
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
225 PM PDT TUE APR 22 2014

.SHORT TERM...TONIGHT THROUGH THURSDAY. AN ACTIVE WEATHER PATTERN IS
EXPECTED FOR THE NEXT FEW DAYS. SHOWERS WILL PERSIST ON AND OFF AND
AS ONE STORM SYSTEM EXITS THE REGION TODAY LEAVING SOME SHOWERS AND
WINDY CONDITIONS BEHIND IT...ANOTHER SYSTEM WILL REPLACE IT TONIGHT
KEEPING THE THREAT FOR SHOWERS IN THE FORECAST INTO WEDNESDAY. A
STRONGER SYSTEM MOVES INTO THE REGION WEDNESDAY NIGHT AND RAIN
CHANCES WILL INCREASE. ALSO THE ATMOSPHERE BECOMES INCREASINGLY
UNSTABLE THURSDAY AFTERNOON AND AN ISOLATED THUNDERSTORM IS POSSIBLE
MAINLY OVER THE EASTERN THIRD OF THE AREA THAT INCLUDES THE
BLUES/WALLOWAS. SNOW LEVELS WILL BE A CHALLENGE FLUCTUATING FROM
3500 FEET TO 4500 FEET AND THERE REMAINS SOME CHANCE FOR EITHER A
MIXTURE OF RAIN AND SNOW OR MAINLY SNOW WITH MINOR ACCUMULATIONS
ACROSS THE HIGHER ELEVATIONS. TEMPERATURES WILL REMAIN SLIGHTLY
BELOW NORMAL THROUGH THE PERIOD.

.LONG TERM...FRIDAY THROUGH TUESDAY...A HIGH AMPLITUDE UPPER LEVEL
TROUGH WILL BE ALONG THE COAST FRIDAY SETTING UP A BROAD SOUTHERLY
FLOW ALOFT OVER FORECAST AREA. 500 MB TEMPERATURES OF -25C TO -30C
WILL FAVOR STEEP LAPSE RATES LEADING TO A MARGINAL UNSTABLE
ATMOSPHERE FRIDAY AFTERNOON FOR SHOWERS LIKELY. THE 12Z ECMWF SHOWS
CAPE OF 300 J/KG FRIDAY AFTERNOON OVER THE EASTERN OREGON MOUNTAINS.
I THEREFORE ADDED A SLIGHT CHANCE OF THUNDERSTORMS FOR FRIDAY
AFTERNOON. IN ADDITION, BOTH THE 12Z GFS AND THE 12Z ECMWF RUNS
INDICATE DYNAMIC LIFT OVER EASTERN LIFT FOR STRONG FORCING ALONG
WITH VERTICAL WIND SHEAR AROUND 40 KTS. FRIDAY NIGHT THE TROUGH
MOVES OVER THE REGION FOR A CHANCE OF SHOWERS MAINLY OVER MOUNTAINS.
SATURDAY THE TROUGH REMAINS OVER FORECAST AREA WHILE THE NEXT
UPSTREAM SHORT WAVE APPROACHES THE COAST SATURDAY AFTERNOON WITH AN
ATTENDANT COLD FRONT. THE SHORT WAVE MOVES ACROSS FORECAST AREA
SATURDAY NIGHT/SUNDAY SWEEPING THE COLD FRONT INTO IDAHO/MONTANA
SATURDAY NIGHT, THUS KEEPING A CHANCE OF SHOWERS IN THE EASTERN
MOUNTAINS AND ALONG THE EAST SLOPES OF THE CASCADES. SUNDAY/SUNDAY
NIGHT INTO MONDAY A WARM FRONT BRING RAIN INTO THE FORECAST AREA
WITH THE BEST CHANCE OF RAIN IN THE MOUNTAINS WITH SNOW LEVELS OF
4500-5500 FEET. MONDAY NIGHT AND TUESDAY A RIDGE OF HIGH PRESSURE
BUILDS OVER THE REGION FOR DRY CONDITIONS.  POLAN

&&

.PREVIOUS AVIATION DISCUSSION...18 TAFS...KPDT RADAR SHOWS RAIN AREA
CONTRACTING IN THE EASTERN SECTIONS OF THE LOWER COLUMBIA BASIN AND
MOVING EAST SUCH THAT RAIN WILL LIKELY END BY 19Z-20Z AT KPSC, KALW
AND KPDT. MVFR CIGS WILL CONTINUE AT KALW UNTIL THEN AND VSBY AT
KALW MAY BRIEFLY BE REDUCED TO IFR WITH THE HEAVIER SHOWERS. -SN
WILL CONTINUE OVER THE BLUE MOUNTAINS FOR A FEW MORE HOURS SO EXPECT
MVFR VSBY AND CIGS ALONG THE AVIATION ROUTE FROM KPDT TO KBKE UNTIL
AROUND 20Z.

VISIBLE SATELLITE IMAGERY SHOWS TREND OF PARTIAL CLEARING AND
THINNING OF CLOUDS IN WESTERN SECTIONS OF THE LOWER COLUMBIA BASIN
SO CLOUD BASES WILL LIFT AND GO FROM BKN TO SCT THIS AFTERNOON IN
THE BASIN. THIS AFTERNOON CIGS WILL BECOME MAINLY SCT (BUT REMAIN
BKN AT KALW) ABOVE 5000 FT AGL. CIGS WILL BEGIN LOWERING LATE THIS
EVENING AND OVERNIGHT DUE TO ANOTHER WEAK DISTURBANCE CROSSING THE
FORECAST AREA, BUT CIGS WILL REMAIN AT VFR LEVELS. MORE SHOWERS WILL
DEVELOP AFTER 06Z WITH A RAIN/SNOW MIX POSSIBLE AT KRDM AND KBDN.
WINDS WILL INCREASE THIS MORNING AND REACH 15 TO 25 KTS WITH GUSTS
TO 35 KTS THIS AFTERNOON THEN DECREASE TO 5 TO 15 KTS WITH GUSTS TO
20 KTS AFTER 06Z TONIGHT.  POLAN

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  39  58  44  60 /  30  30  60  60
ALW  43  57  46  60 /  30  30  60  70
PSC  43  63  49  65 /  20  30  50  60
YKM  37  59  40  60 /  20  20  50  60
HRI  41  62  46  64 /  30  30  60  60
ELN  38  58  39  60 /  20  20  60  60
RDM  31  55  37  55 /  30  30  60  50
LGD  36  53  40  55 /  30  40  70  80
GCD  33  54  36  52 /  30  40  60  70
DLS  42  61  46  60 /  30  40  70  70

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...NONE.
WA...WIND ADVISORY UNTIL 8 PM PDT THIS EVENING WAZ026.

&&

THREAT INDEX
WEDNESDAY : GREEN
THURSDAY : GREEN
FRIDAY : GREEN

GREEN: NONE OR LIMITED NEED FOR WATCHES, WARNINGS, OR ADVISORIES.
YELLOW: A FEW WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.
RED: NUMEROUS WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

97/99/99










000
FXUS66 KPDT 221800 AAB
AFDPDT

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE PENDLETON OR
1100 AM PDT TUE APR 22 2014

UPDATED AVIATION DISCUSSION

.UPDATE...THE LATEST RADAR WAS SHOWING SCATTERED TO NUMEROUS SHOWERS
ACROSS MOST PORTIONS OF THE REGION THIS MORNING AND THIS IS EXPECTED
TO CONTINUE INTO THE AFTERNOON. AS THE BULK OF THE SHOWERS DRIFT
EAST THIS AFTERNOON...BREEZY WEST WINDS WILL DEVELOP ESPECIALLY OVER
THE KITTITAS VALLEY WHERE A WIND ADVISORY IS IN EFFECT. WITH THE
INCREASED CLOUD COVER AND SHOWERS THE AFTERNOON TEMPERATURES WERE
ADJUSTED A DEGREE OR TWO LOWER AND THE PRESENT SHORT TERM FORECAST
APPEARS ON TRACK.

&&

.AVIATION...18 TAFS...KPDT RADAR SHOWS RAIN AREA CONTRACTING IN THE
EASTERN SECTIONS OF THE LOWER COLUMBIA BASIN AND MOVING EAST SUCH
THAT RAIN WILL LIKELY END BY 19Z-20Z AT KPSC, KALW AND KPDT. MVFR
CIGS WILL CONTINUE AT KALW UNTIL THEN AND VSBY AT KALW MAY BRIEFLY
BE REDUCED TO IFR WITH THE HEAVIER SHOWERS. -SN WILL CONTINUE OVER
THE BLUE MOUNTAINS FOR A FEW MORE HOURS SO EXPECT MVFR VSBY AND CIGS
ALONG THE AVIATION ROUTE FROM KPDT TO KBKE UNTIL AROUND 20Z.

VISIBLE SATELLITE IMAGERY SHOWS TREND OF PARTIAL CLEARING AND
THINNING OF CLOUDS IN WESTERN SECTIONS OF THE LOWER COLUMBIA BASIN
SO CLOUD BASES WILL LIFT AND GO FROM BKN TO SCT THIS AFTERNOON IN
THE BASIN. THIS AFTERNOON CIGS WILL BECOME MAINLY SCT (BUT REMAIN
BKN AT KALW) ABOVE 5000 FT AGL. CIGS WILL BEGIN LOWERING LATE THIS
EVENING AND OVERNIGHT DUE TO ANOTHER WEAK DISTURBANCE CROSSING THE
FORECAST AREA, BUT CIGS WILL REMAIN AT VFR LEVELS. MORE SHOWERS WILL
DEVELOP AFTER 06Z WITH A RAIN/SNOW MIX POSSIBLE AT KRDM AND KBDN.
WINDS WILL INCREASE THIS MORNING AND REACH 15 TO 25 KTS WITH GUSTS
TO 35 KTS THIS AFTERNOON THEN DECREASE TO 5 TO 15 KTS WITH GUSTS TO
20 KTS AFTER 06Z TONIGHT.  POLAN

&&

.PREVIOUS DISCUSSION... /ISSUED 509 AM PDT TUE APR 22 2014/

SHORT TERM...TODAY THROUGH WEDNESDAY...AN UPPER TROUGH IS CURRENTLY
NEARING THE PACIFIC NORTHWEST COAST EARLY THIS MORNING. THE SYSTEM`S
COLD FRONT IS JUST AHEAD OF THE UPPER TROUGH AXIS, CURRENTLY MOVING
INTO THE WILLAMETTE VALLEY AND PUGET SOUND. AS SUCH WILL SEE A
GRADUAL DECREASE IN PRECIP THROUGH MID MORNING FROM CENTRAL
WASHINGTON SOUTH TO CENTRAL OREGON. MEANWHILE PRECIP WILL CONTINUE
OR INCREASE ELSEWHERE INTO MID MORNING. SHOWERS WILL DECREASE FORM
WEST TO EAST THIS AFTERNOON AND THIS EVENING AS THE TROUGH AXIS
MOVES THROUGH THE INTERIOR NORTHWEST. WINDS WILL INCREASE THROUGH
THE MORNING, PEAKING IN THE AFTERNOON AND EARLY EVENING. SUSTAINED
SPEEDS WILL MAINLY RUN BETWEEN 15 AND 30 MPH. THE STRONGEST WINDS
WILL BE IN THE KITTITAS VALLEY AND WILL ISSUE A WIND ADVISORY FOR
THIS ZONE. SNOW LEVELS WILL GRADUALLY FALL TODAY. SNOW LEVELS WILL
FALL TO AROUND 3500 FEET THIS MORNING OVER CENTRAL OREGON AND
CENTRAL WASHINGTON. THIS LEVELS WILL INCREASE SLIGHTLY IN THE
AFTERNOON. ELSEWHERE SNOW LEVELS WILL RUN BETWEEN 4500 AND 6000 FEET
THIS MORNING, AND BETWEEN 4500 AND 5000 FEET THIS AFTERNOON. EXPECT
LIGHT SNOW AMOUNTS OF 3 INCHES OR LESS AT THE HIGHER ELEVATIONS
TODAY. ANOTHER WEAK DISTURBANCE WILL BRING AN INCREASE IN SHOWER
ACTIVITY OVERNIGHT. ONSHORE FLOW WEDNESDAY WILL KEEP VARYING CHANCES
OF SHOWERS GOING THROUGH THE DAY, WITH THE BEST CHANCES OVER THE
MOUNTAINS. SNOW LEVELS OVERNIGHT TONIGHT INTO EARLY WEDNESDAY WILL
RUN AROUND 3000 FEET, THEN RISE TO BETWEEN 4000 AND 4500 FEET
WEDNESDAY AFTERNOON. PRECIP AMOUNTS WILL BE LIGHT, THUS SNOW AMOUNTS
WILL BE LIMITED. 90

LONG TERM...WEDNESDAY NIGHT THROUGH TUESDAY...A WEAK TRANSITORY
RIDGE WILL CROSS THE AREA WEDNESDAY NIGHT AS A TROUGH CONTINUES TO
MOVE OFF INTO THE ROCKIES. LINGERING SHOWERS AND A MOIST WESTERLY
FLOW WILL KEEP A CHANCE OF CHANCE OF RAIN IN THE MOUNTAINS AND A
SLIGHT CHANCE OF RAIN IN THE COLUMBIA BASIN. ON THURSDAY A DEEP
UPPER LEVEL TROUGH WILL PUSH A FRONT ACROSS THE AREA WITH A GENEROUS
HELPING OF RAIN EXPECTED ACROSS THE AREA. LOWER ELEVATIONS WILL SEE
AROUND A QUARTER OF AN INCH AND UP HALF AN INCH IS EXPECTED IN THE
MOUNTAINS. THERE WILL ALSO BE SOME INSTABILITY IN THE EASTERN
MOUNTAINS, SO HAVE ADDED A SLIGHT CHANCE OF THUNDERSTORMS THERE IN
THE AFTERNOON AND EVENING. THE RAIN WILL TAPER OFF TO SHOWERS
THURSDAY NIGHT. THE TROUGH WILL REMAIN OVER THE AREA FRIDAY AND
FRIDAY NIGHT AND THE UNSETTLED CONDITIONS WILL CONTINUE WITH LIGHT
RAIN AND MOUNTAIN SNOW SHOWERS THROUGH FRIDAY NIGHT. SNOW LEVELS
FRIDAY WILL DROP TO AROUND 4000-4500 FEET SO LOCATIONS ABOVE THAT
ELEVATION MAY SEE AN INCH OR SO OF SNOW. ON SATURDAY MOST OF THE
ENERGY IN THE TROUGH WILL MOVE EAST BUT WITH THE TROUGH AND MOISTURE
STILL OVER THE AREA HAVE CONTINUED A SLIGHT CHANCE OF RAIN SHOWERS
IN THE LOWER ELEVATIONS AND A CHANCE OF RAIN AND SNOW SHOWERS IN THE
MOUNTAINS THROUGH SATURDAY NIGHT. MODELS SHOW ANOTHER FRONT ARRIVING
SUNDAY BUT DISAGREE AS TO ITS STRENGTH. THE GFS HAS IT SPLIT AND
FALL APART WHILE THE THE ECMWF KEEPS IT INTACT. GIVEN THE
DIFFERENCES, HAVE KEPT A SLIGHT CHANCE OF RAIN SHOWERS IN THE LOWER
ELEVATIONS AND A CHANCE OF RAIN SHOWERS IN THE MOUNTAINS. MODELS
THEN BEGIN TO SHOW RIDGING DEVELOPING MONDAY THROUGH TUESDAY. HAVE
TO BEGUN TO DRY OUT THE FORECAST MONDAY THROUGH TUESDAY. PERRY.

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  54  39  58  44 /  80  30  30  60
ALW  54  43  57  46 /  80  40  30  50
PSC  61  43  63  49 /  70  20  30  50
YKM  59  37  59  40 /  50  20  20  50
HRI  59  41  62  46 /  70  20  30  50
ELN  55  38  58  39 /  50  20  20  50
RDM  50  31  55  37 /  50  30  30  60
LGD  49  36  53  40 /  80  40  40  70
GCD  50  33  54  36 /  80  40  40  60
DLS  57  42  61  46 /  50  30  40  70

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...NONE.
WA...WIND ADVISORY FROM 11 AM THIS MORNING TO 8 PM PDT THIS EVENING
     WAZ026.

&&

THREAT INDEX
TODAY : GREEN
WEDNESDAY : GREEN
THURSDAY : GREEN

GREEN: NONE OR LIMITED NEED FOR WATCHES, WARNINGS, OR ADVISORIES.
YELLOW: A FEW WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.
RED: NUMEROUS WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

97/99/90/








000
FXUS66 KPDT 221800 AAB
AFDPDT

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE PENDLETON OR
1100 AM PDT TUE APR 22 2014

UPDATED AVIATION DISCUSSION

.UPDATE...THE LATEST RADAR WAS SHOWING SCATTERED TO NUMEROUS SHOWERS
ACROSS MOST PORTIONS OF THE REGION THIS MORNING AND THIS IS EXPECTED
TO CONTINUE INTO THE AFTERNOON. AS THE BULK OF THE SHOWERS DRIFT
EAST THIS AFTERNOON...BREEZY WEST WINDS WILL DEVELOP ESPECIALLY OVER
THE KITTITAS VALLEY WHERE A WIND ADVISORY IS IN EFFECT. WITH THE
INCREASED CLOUD COVER AND SHOWERS THE AFTERNOON TEMPERATURES WERE
ADJUSTED A DEGREE OR TWO LOWER AND THE PRESENT SHORT TERM FORECAST
APPEARS ON TRACK.

&&

.AVIATION...18 TAFS...KPDT RADAR SHOWS RAIN AREA CONTRACTING IN THE
EASTERN SECTIONS OF THE LOWER COLUMBIA BASIN AND MOVING EAST SUCH
THAT RAIN WILL LIKELY END BY 19Z-20Z AT KPSC, KALW AND KPDT. MVFR
CIGS WILL CONTINUE AT KALW UNTIL THEN AND VSBY AT KALW MAY BRIEFLY
BE REDUCED TO IFR WITH THE HEAVIER SHOWERS. -SN WILL CONTINUE OVER
THE BLUE MOUNTAINS FOR A FEW MORE HOURS SO EXPECT MVFR VSBY AND CIGS
ALONG THE AVIATION ROUTE FROM KPDT TO KBKE UNTIL AROUND 20Z.

VISIBLE SATELLITE IMAGERY SHOWS TREND OF PARTIAL CLEARING AND
THINNING OF CLOUDS IN WESTERN SECTIONS OF THE LOWER COLUMBIA BASIN
SO CLOUD BASES WILL LIFT AND GO FROM BKN TO SCT THIS AFTERNOON IN
THE BASIN. THIS AFTERNOON CIGS WILL BECOME MAINLY SCT (BUT REMAIN
BKN AT KALW) ABOVE 5000 FT AGL. CIGS WILL BEGIN LOWERING LATE THIS
EVENING AND OVERNIGHT DUE TO ANOTHER WEAK DISTURBANCE CROSSING THE
FORECAST AREA, BUT CIGS WILL REMAIN AT VFR LEVELS. MORE SHOWERS WILL
DEVELOP AFTER 06Z WITH A RAIN/SNOW MIX POSSIBLE AT KRDM AND KBDN.
WINDS WILL INCREASE THIS MORNING AND REACH 15 TO 25 KTS WITH GUSTS
TO 35 KTS THIS AFTERNOON THEN DECREASE TO 5 TO 15 KTS WITH GUSTS TO
20 KTS AFTER 06Z TONIGHT.  POLAN

&&

.PREVIOUS DISCUSSION... /ISSUED 509 AM PDT TUE APR 22 2014/

SHORT TERM...TODAY THROUGH WEDNESDAY...AN UPPER TROUGH IS CURRENTLY
NEARING THE PACIFIC NORTHWEST COAST EARLY THIS MORNING. THE SYSTEM`S
COLD FRONT IS JUST AHEAD OF THE UPPER TROUGH AXIS, CURRENTLY MOVING
INTO THE WILLAMETTE VALLEY AND PUGET SOUND. AS SUCH WILL SEE A
GRADUAL DECREASE IN PRECIP THROUGH MID MORNING FROM CENTRAL
WASHINGTON SOUTH TO CENTRAL OREGON. MEANWHILE PRECIP WILL CONTINUE
OR INCREASE ELSEWHERE INTO MID MORNING. SHOWERS WILL DECREASE FORM
WEST TO EAST THIS AFTERNOON AND THIS EVENING AS THE TROUGH AXIS
MOVES THROUGH THE INTERIOR NORTHWEST. WINDS WILL INCREASE THROUGH
THE MORNING, PEAKING IN THE AFTERNOON AND EARLY EVENING. SUSTAINED
SPEEDS WILL MAINLY RUN BETWEEN 15 AND 30 MPH. THE STRONGEST WINDS
WILL BE IN THE KITTITAS VALLEY AND WILL ISSUE A WIND ADVISORY FOR
THIS ZONE. SNOW LEVELS WILL GRADUALLY FALL TODAY. SNOW LEVELS WILL
FALL TO AROUND 3500 FEET THIS MORNING OVER CENTRAL OREGON AND
CENTRAL WASHINGTON. THIS LEVELS WILL INCREASE SLIGHTLY IN THE
AFTERNOON. ELSEWHERE SNOW LEVELS WILL RUN BETWEEN 4500 AND 6000 FEET
THIS MORNING, AND BETWEEN 4500 AND 5000 FEET THIS AFTERNOON. EXPECT
LIGHT SNOW AMOUNTS OF 3 INCHES OR LESS AT THE HIGHER ELEVATIONS
TODAY. ANOTHER WEAK DISTURBANCE WILL BRING AN INCREASE IN SHOWER
ACTIVITY OVERNIGHT. ONSHORE FLOW WEDNESDAY WILL KEEP VARYING CHANCES
OF SHOWERS GOING THROUGH THE DAY, WITH THE BEST CHANCES OVER THE
MOUNTAINS. SNOW LEVELS OVERNIGHT TONIGHT INTO EARLY WEDNESDAY WILL
RUN AROUND 3000 FEET, THEN RISE TO BETWEEN 4000 AND 4500 FEET
WEDNESDAY AFTERNOON. PRECIP AMOUNTS WILL BE LIGHT, THUS SNOW AMOUNTS
WILL BE LIMITED. 90

LONG TERM...WEDNESDAY NIGHT THROUGH TUESDAY...A WEAK TRANSITORY
RIDGE WILL CROSS THE AREA WEDNESDAY NIGHT AS A TROUGH CONTINUES TO
MOVE OFF INTO THE ROCKIES. LINGERING SHOWERS AND A MOIST WESTERLY
FLOW WILL KEEP A CHANCE OF CHANCE OF RAIN IN THE MOUNTAINS AND A
SLIGHT CHANCE OF RAIN IN THE COLUMBIA BASIN. ON THURSDAY A DEEP
UPPER LEVEL TROUGH WILL PUSH A FRONT ACROSS THE AREA WITH A GENEROUS
HELPING OF RAIN EXPECTED ACROSS THE AREA. LOWER ELEVATIONS WILL SEE
AROUND A QUARTER OF AN INCH AND UP HALF AN INCH IS EXPECTED IN THE
MOUNTAINS. THERE WILL ALSO BE SOME INSTABILITY IN THE EASTERN
MOUNTAINS, SO HAVE ADDED A SLIGHT CHANCE OF THUNDERSTORMS THERE IN
THE AFTERNOON AND EVENING. THE RAIN WILL TAPER OFF TO SHOWERS
THURSDAY NIGHT. THE TROUGH WILL REMAIN OVER THE AREA FRIDAY AND
FRIDAY NIGHT AND THE UNSETTLED CONDITIONS WILL CONTINUE WITH LIGHT
RAIN AND MOUNTAIN SNOW SHOWERS THROUGH FRIDAY NIGHT. SNOW LEVELS
FRIDAY WILL DROP TO AROUND 4000-4500 FEET SO LOCATIONS ABOVE THAT
ELEVATION MAY SEE AN INCH OR SO OF SNOW. ON SATURDAY MOST OF THE
ENERGY IN THE TROUGH WILL MOVE EAST BUT WITH THE TROUGH AND MOISTURE
STILL OVER THE AREA HAVE CONTINUED A SLIGHT CHANCE OF RAIN SHOWERS
IN THE LOWER ELEVATIONS AND A CHANCE OF RAIN AND SNOW SHOWERS IN THE
MOUNTAINS THROUGH SATURDAY NIGHT. MODELS SHOW ANOTHER FRONT ARRIVING
SUNDAY BUT DISAGREE AS TO ITS STRENGTH. THE GFS HAS IT SPLIT AND
FALL APART WHILE THE THE ECMWF KEEPS IT INTACT. GIVEN THE
DIFFERENCES, HAVE KEPT A SLIGHT CHANCE OF RAIN SHOWERS IN THE LOWER
ELEVATIONS AND A CHANCE OF RAIN SHOWERS IN THE MOUNTAINS. MODELS
THEN BEGIN TO SHOW RIDGING DEVELOPING MONDAY THROUGH TUESDAY. HAVE
TO BEGUN TO DRY OUT THE FORECAST MONDAY THROUGH TUESDAY. PERRY.

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  54  39  58  44 /  80  30  30  60
ALW  54  43  57  46 /  80  40  30  50
PSC  61  43  63  49 /  70  20  30  50
YKM  59  37  59  40 /  50  20  20  50
HRI  59  41  62  46 /  70  20  30  50
ELN  55  38  58  39 /  50  20  20  50
RDM  50  31  55  37 /  50  30  30  60
LGD  49  36  53  40 /  80  40  40  70
GCD  50  33  54  36 /  80  40  40  60
DLS  57  42  61  46 /  50  30  40  70

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...NONE.
WA...WIND ADVISORY FROM 11 AM THIS MORNING TO 8 PM PDT THIS EVENING
     WAZ026.

&&

THREAT INDEX
TODAY : GREEN
WEDNESDAY : GREEN
THURSDAY : GREEN

GREEN: NONE OR LIMITED NEED FOR WATCHES, WARNINGS, OR ADVISORIES.
YELLOW: A FEW WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.
RED: NUMEROUS WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

97/99/90/







000
FXUS66 KPDT 221544 AAA
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
840 AM PDT TUE APR 22 2014

.UPDATE...THE LATEST RADAR WAS SHOWING SCATTERED TO NUMEROUS SHOWERS
ACROSS MOST PORTIONS OF THE REGION THIS MORNING AND THIS IS EXPECTED
TO CONTINUE INTO THE AFTERNOON. AS THE BULK OF THE SHOWERS DRIFT
EAST THIS AFTERNOON...BREEZY WEST WINDS WILL DEVELOP ESPECIALLY OVER
THE KITTITAS VALLEY WHERE A WIND ADVISORY IS IN EFFECT. WITH THE
INCREASED CLOUD COVER AND SHOWERS THE AFTERNOON TEMPERATURES WERE
ADJUSTED A DEGREE OR TWO LOWER AND THE PRESENT SHORT TERM FORECAST
APPEARS ON TRACK.

&&

.PREV DISC... /ISSUED 509 AM PDT TUE APR 22 2014/

SHORT TERM...TODAY THROUGH WEDNESDAY...AN UPPER TROUGH IS CURRENTLY
NEARING THE PACIFIC NORTHWEST COAST EARLY THIS MORNING. THE SYSTEM`S
COLD FRONT IS JUST AHEAD OF THE UPPER TROUGH AXIS, CURRENTLY MOVING
INTO THE WILLAMETTE VALLEY AND PUGET SOUND. AS SUCH WILL SEE A
GRADUAL DECREASE IN PRECIP THROUGH MID MORNING FROM CENTRAL
WASHINGTON SOUTH TO CENTRAL OREGON. MEANWHILE PRECIP WILL CONTINUE
OR INCREASE ELSEWHERE INTO MID MORNING. SHOWERS WILL DECREASE FORM
WEST TO EAST THIS AFTERNOON AND THIS EVENING AS THE TROUGH AXIS
MOVES THROUGH THE INTERIOR NORTHWEST. WINDS WILL INCREASE THROUGH
THE MORNING, PEAKING IN THE AFTERNOON AND EARLY EVENING. SUSTAINED
SPEEDS WILL MAINLY RUN BETWEEN 15 AND 30 MPH. THE STRONGEST WINDS
WILL BE IN THE KITTITAS VALLEY AND WILL ISSUE A WIND ADVISORY FOR
THIS ZONE. SNOW LEVELS WILL GRADUALLY FALL TODAY. SNOW LEVELS WILL
FALL TO AROUND 3500 FEET THIS MORNING OVER CENTRAL OREGON AND
CENTRAL WASHINGTON. THIS LEVELS WILL INCREASE SLIGHTLY IN THE
AFTERNOON. ELSEWHERE SNOW LEVELS WILL RUN BETWEEN 4500 AND 6000 FEET
THIS MORNING, AND BETWEEN 4500 AND 5000 FEET THIS AFTERNOON. EXPECT
LIGHT SNOW AMOUNTS OF 3 INCHES OR LESS AT THE HIGHER ELEVATIONS
TODAY. ANOTHER WEAK DISTURBANCE WILL BRING AN INCREASE IN SHOWER
ACTIVITY OVERNIGHT. ONSHORE FLOW WEDNESDAY WILL KEEP VARYING CHANCES
OF SHOWERS GOING THROUGH THE DAY, WITH THE BEST CHANCES OVER THE
MOUNTAINS. SNOW LEVELS OVERNIGHT TONIGHT INTO EARLY WEDNESDAY WILL
RUN AROUND 3000 FEET, THEN RISE TO BETWEEN 4000 AND 4500 FEET
WEDNESDAY AFTERNOON. PRECIP AMOUNTS WILL BE LIGHT, THUS SNOW AMOUNTS
WILL BE LIMITED. 90

LONG TERM...WEDNESDAY NIGHT THROUGH TUESDAY...A WEAK TRANSITORY
RIDGE WILL CROSS THE AREA WEDNESDAY NIGHT AS A TROUGH CONTINUES TO
MOVE OFF INTO THE ROCKIES. LINGERING SHOWERS AND A MOIST WESTERLY
FLOW WILL KEEP A CHANCE OF CHANCE OF RAIN IN THE MOUNTAINS AND A
SLIGHT CHANCE OF RAIN IN THE COLUMBIA BASIN. ON THURSDAY A DEEP
UPPER LEVEL TROUGH WILL PUSH A FRONT ACROSS THE AREA WITH A GENEROUS
HELPING OF RAIN EXPECTED ACROSS THE AREA. LOWER ELEVATIONS WILL SEE
AROUND A QUARTER OF AN INCH AND UP HALF AN INCH IS EXPECTED IN THE
MOUNTAINS. THERE WILL ALSO BE SOME INSTABILITY IN THE EASTERN
MOUNTAINS, SO HAVE ADDED A SLIGHT CHANCE OF THUNDERSTORMS THERE IN
THE AFTERNOON AND EVENING. THE RAIN WILL TAPER OFF TO SHOWERS
THURSDAY NIGHT. THE TROUGH WILL REMAIN OVER THE AREA FRIDAY AND
FRIDAY NIGHT AND THE UNSETTLED CONDITIONS WILL CONTINUE WITH LIGHT
RAIN AND MOUNTAIN SNOW SHOWERS THROUGH FRIDAY NIGHT. SNOW LEVELS
FRIDAY WILL DROP TO AROUND 4000-4500 FEET SO LOCATIONS ABOVE THAT
ELEVATION MAY SEE AN INCH OR SO OF SNOW. ON SATURDAY MOST OF THE
ENERGY IN THE TROUGH WILL MOVE EAST BUT WITH THE TROUGH AND MOISTURE
STILL OVER THE AREA HAVE CONTINUED A SLIGHT CHANCE OF RAIN SHOWERS
IN THE LOWER ELEVATIONS AND A CHANCE OF RAIN AND SNOW SHOWERS IN THE
MOUNTAINS THROUGH SATURDAY NIGHT. MODELS SHOW ANOTHER FRONT ARRIVING
SUNDAY BUT DISAGREE AS TO ITS STRENGTH. THE GFS HAS IT SPLIT AND
FALL APART WHILE THE THE ECMWF KEEPS IT INTACT. GIVEN THE
DIFFERENCES, HAVE KEPT A SLIGHT CHANCE OF RAIN SHOWERS IN THE LOWER
ELEVATIONS AND A CHANCE OF RAIN SHOWERS IN THE MOUNTAINS. MODELS
THEN BEGIN TO SHOW RIDGING DEVELOPING MONDAY THROUGH TUESDAY. HAVE
TO BEGUN TO DRY OUT THE FORECAST MONDAY THROUGH TUESDAY. PERRY.

AVIATION...12Z TAFS...RAIN HAS SPREAD ACROSS THE AREA EARLY THIS
MORNING AND WILL SOON BEGIN TAPERING OFF FROM CENTRAL OREGON
NORTHEASTWARD. IT WILL END AT WESTERN TAF SITES KRDM, KBDN KDLS AND
KYKM FROM 14Z-17Z AND AT KPSC, KALW AND KPDT AROUND 20Z. OCCASIONAL
MVFR CEILINGS WILL CONTINUE UNTIL THEN WITH THE HEAVIER SHOWERS.
THIS AFTERNOON CEILINGS WILL BECOME SCATTERED TO BROKEN ABOVE 5000
FEET AGL. CEILINGS WILL BEGIN LOWERING LATE THIS EVENING AND
OVERNIGHT WITH ANOTHER WEAK DISTURBANCE CROSSES THE AREA BUT
CEILINGS WILL REMAIN AT VFR LEVELS. MORE SHOWERS WILL DEVELOP AFTER
06Z WITH A RAIN/SNOW MIX POSSIBLE AT KRDM AND KBDN. WINDS WILL
INCREASE THIS MORNING AND REACH 15 TO 25 KTS WITH GUSTS TO 35 KTS
THIS AFTERNOON THEN DECREASE TO 5 TO 15 KTS WITH GUSTS TO 20 KTS
AFTER 06Z TONIGHT. PERRY

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  54  39  58  44 /  80  30  30  60
ALW  54  43  57  46 /  80  40  30  50
PSC  61  43  63  49 /  70  20  30  50
YKM  59  37  59  40 /  50  20  20  50
HRI  59  41  62  46 /  70  20  30  50
ELN  55  38  58  39 /  50  20  20  50
RDM  50  31  55  37 /  50  30  30  60
LGD  49  36  53  40 /  80  40  40  70
GCD  50  33  54  36 /  80  40  40  60
DLS  57  42  61  46 /  50  30  40  70

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...NONE.
WA...WIND ADVISORY FROM 11 AM THIS MORNING TO 8 PM PDT THIS EVENING
     WAZ026.

&&

THREAT INDEX
TODAY : GREEN
WEDNESDAY : GREEN
THURSDAY : GREEN

GREEN: NONE OR LIMITED NEED FOR WATCHES, WARNINGS, OR ADVISORIES.
YELLOW: A FEW WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.
RED: NUMEROUS WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

97/99/76









000
FXUS66 KPDT 221544 AAA
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
840 AM PDT TUE APR 22 2014

.UPDATE...THE LATEST RADAR WAS SHOWING SCATTERED TO NUMEROUS SHOWERS
ACROSS MOST PORTIONS OF THE REGION THIS MORNING AND THIS IS EXPECTED
TO CONTINUE INTO THE AFTERNOON. AS THE BULK OF THE SHOWERS DRIFT
EAST THIS AFTERNOON...BREEZY WEST WINDS WILL DEVELOP ESPECIALLY OVER
THE KITTITAS VALLEY WHERE A WIND ADVISORY IS IN EFFECT. WITH THE
INCREASED CLOUD COVER AND SHOWERS THE AFTERNOON TEMPERATURES WERE
ADJUSTED A DEGREE OR TWO LOWER AND THE PRESENT SHORT TERM FORECAST
APPEARS ON TRACK.

&&

.PREV DISC... /ISSUED 509 AM PDT TUE APR 22 2014/

SHORT TERM...TODAY THROUGH WEDNESDAY...AN UPPER TROUGH IS CURRENTLY
NEARING THE PACIFIC NORTHWEST COAST EARLY THIS MORNING. THE SYSTEM`S
COLD FRONT IS JUST AHEAD OF THE UPPER TROUGH AXIS, CURRENTLY MOVING
INTO THE WILLAMETTE VALLEY AND PUGET SOUND. AS SUCH WILL SEE A
GRADUAL DECREASE IN PRECIP THROUGH MID MORNING FROM CENTRAL
WASHINGTON SOUTH TO CENTRAL OREGON. MEANWHILE PRECIP WILL CONTINUE
OR INCREASE ELSEWHERE INTO MID MORNING. SHOWERS WILL DECREASE FORM
WEST TO EAST THIS AFTERNOON AND THIS EVENING AS THE TROUGH AXIS
MOVES THROUGH THE INTERIOR NORTHWEST. WINDS WILL INCREASE THROUGH
THE MORNING, PEAKING IN THE AFTERNOON AND EARLY EVENING. SUSTAINED
SPEEDS WILL MAINLY RUN BETWEEN 15 AND 30 MPH. THE STRONGEST WINDS
WILL BE IN THE KITTITAS VALLEY AND WILL ISSUE A WIND ADVISORY FOR
THIS ZONE. SNOW LEVELS WILL GRADUALLY FALL TODAY. SNOW LEVELS WILL
FALL TO AROUND 3500 FEET THIS MORNING OVER CENTRAL OREGON AND
CENTRAL WASHINGTON. THIS LEVELS WILL INCREASE SLIGHTLY IN THE
AFTERNOON. ELSEWHERE SNOW LEVELS WILL RUN BETWEEN 4500 AND 6000 FEET
THIS MORNING, AND BETWEEN 4500 AND 5000 FEET THIS AFTERNOON. EXPECT
LIGHT SNOW AMOUNTS OF 3 INCHES OR LESS AT THE HIGHER ELEVATIONS
TODAY. ANOTHER WEAK DISTURBANCE WILL BRING AN INCREASE IN SHOWER
ACTIVITY OVERNIGHT. ONSHORE FLOW WEDNESDAY WILL KEEP VARYING CHANCES
OF SHOWERS GOING THROUGH THE DAY, WITH THE BEST CHANCES OVER THE
MOUNTAINS. SNOW LEVELS OVERNIGHT TONIGHT INTO EARLY WEDNESDAY WILL
RUN AROUND 3000 FEET, THEN RISE TO BETWEEN 4000 AND 4500 FEET
WEDNESDAY AFTERNOON. PRECIP AMOUNTS WILL BE LIGHT, THUS SNOW AMOUNTS
WILL BE LIMITED. 90

LONG TERM...WEDNESDAY NIGHT THROUGH TUESDAY...A WEAK TRANSITORY
RIDGE WILL CROSS THE AREA WEDNESDAY NIGHT AS A TROUGH CONTINUES TO
MOVE OFF INTO THE ROCKIES. LINGERING SHOWERS AND A MOIST WESTERLY
FLOW WILL KEEP A CHANCE OF CHANCE OF RAIN IN THE MOUNTAINS AND A
SLIGHT CHANCE OF RAIN IN THE COLUMBIA BASIN. ON THURSDAY A DEEP
UPPER LEVEL TROUGH WILL PUSH A FRONT ACROSS THE AREA WITH A GENEROUS
HELPING OF RAIN EXPECTED ACROSS THE AREA. LOWER ELEVATIONS WILL SEE
AROUND A QUARTER OF AN INCH AND UP HALF AN INCH IS EXPECTED IN THE
MOUNTAINS. THERE WILL ALSO BE SOME INSTABILITY IN THE EASTERN
MOUNTAINS, SO HAVE ADDED A SLIGHT CHANCE OF THUNDERSTORMS THERE IN
THE AFTERNOON AND EVENING. THE RAIN WILL TAPER OFF TO SHOWERS
THURSDAY NIGHT. THE TROUGH WILL REMAIN OVER THE AREA FRIDAY AND
FRIDAY NIGHT AND THE UNSETTLED CONDITIONS WILL CONTINUE WITH LIGHT
RAIN AND MOUNTAIN SNOW SHOWERS THROUGH FRIDAY NIGHT. SNOW LEVELS
FRIDAY WILL DROP TO AROUND 4000-4500 FEET SO LOCATIONS ABOVE THAT
ELEVATION MAY SEE AN INCH OR SO OF SNOW. ON SATURDAY MOST OF THE
ENERGY IN THE TROUGH WILL MOVE EAST BUT WITH THE TROUGH AND MOISTURE
STILL OVER THE AREA HAVE CONTINUED A SLIGHT CHANCE OF RAIN SHOWERS
IN THE LOWER ELEVATIONS AND A CHANCE OF RAIN AND SNOW SHOWERS IN THE
MOUNTAINS THROUGH SATURDAY NIGHT. MODELS SHOW ANOTHER FRONT ARRIVING
SUNDAY BUT DISAGREE AS TO ITS STRENGTH. THE GFS HAS IT SPLIT AND
FALL APART WHILE THE THE ECMWF KEEPS IT INTACT. GIVEN THE
DIFFERENCES, HAVE KEPT A SLIGHT CHANCE OF RAIN SHOWERS IN THE LOWER
ELEVATIONS AND A CHANCE OF RAIN SHOWERS IN THE MOUNTAINS. MODELS
THEN BEGIN TO SHOW RIDGING DEVELOPING MONDAY THROUGH TUESDAY. HAVE
TO BEGUN TO DRY OUT THE FORECAST MONDAY THROUGH TUESDAY. PERRY.

AVIATION...12Z TAFS...RAIN HAS SPREAD ACROSS THE AREA EARLY THIS
MORNING AND WILL SOON BEGIN TAPERING OFF FROM CENTRAL OREGON
NORTHEASTWARD. IT WILL END AT WESTERN TAF SITES KRDM, KBDN KDLS AND
KYKM FROM 14Z-17Z AND AT KPSC, KALW AND KPDT AROUND 20Z. OCCASIONAL
MVFR CEILINGS WILL CONTINUE UNTIL THEN WITH THE HEAVIER SHOWERS.
THIS AFTERNOON CEILINGS WILL BECOME SCATTERED TO BROKEN ABOVE 5000
FEET AGL. CEILINGS WILL BEGIN LOWERING LATE THIS EVENING AND
OVERNIGHT WITH ANOTHER WEAK DISTURBANCE CROSSES THE AREA BUT
CEILINGS WILL REMAIN AT VFR LEVELS. MORE SHOWERS WILL DEVELOP AFTER
06Z WITH A RAIN/SNOW MIX POSSIBLE AT KRDM AND KBDN. WINDS WILL
INCREASE THIS MORNING AND REACH 15 TO 25 KTS WITH GUSTS TO 35 KTS
THIS AFTERNOON THEN DECREASE TO 5 TO 15 KTS WITH GUSTS TO 20 KTS
AFTER 06Z TONIGHT. PERRY

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  54  39  58  44 /  80  30  30  60
ALW  54  43  57  46 /  80  40  30  50
PSC  61  43  63  49 /  70  20  30  50
YKM  59  37  59  40 /  50  20  20  50
HRI  59  41  62  46 /  70  20  30  50
ELN  55  38  58  39 /  50  20  20  50
RDM  50  31  55  37 /  50  30  30  60
LGD  49  36  53  40 /  80  40  40  70
GCD  50  33  54  36 /  80  40  40  60
DLS  57  42  61  46 /  50  30  40  70

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...NONE.
WA...WIND ADVISORY FROM 11 AM THIS MORNING TO 8 PM PDT THIS EVENING
     WAZ026.

&&

THREAT INDEX
TODAY : GREEN
WEDNESDAY : GREEN
THURSDAY : GREEN

GREEN: NONE OR LIMITED NEED FOR WATCHES, WARNINGS, OR ADVISORIES.
YELLOW: A FEW WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.
RED: NUMEROUS WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

97/99/76










000
FXUS66 KPDT 221209 AAA
AFDPDT

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE PENDLETON OR
509 AM PDT TUE APR 22 2014

UPDATED AVIATION DISCUSSION

.SHORT TERM...TODAY THROUGH WEDNESDAY...AN UPPER TROUGH IS CURRENTLY
NEARING THE PACIFIC NORTHWEST COAST EARLY THIS MORNING. THE SYSTEM`S
COLD FRONT IS JUST AHEAD OF THE UPPER TROUGH AXIS, CURRENTLY MOVING
INTO THE WILLAMETTE VALLEY AND PUGET SOUND. AS SUCH WILL SEE A
GRADUAL DECREASE IN PRECIP THROUGH MID MORNING FROM CENTRAL
WASHINGTON SOUTH TO CENTRAL OREGON. MEANWHILE PRECIP WILL CONTINUE
OR INCREASE ELSEWHERE INTO MID MORNING. SHOWERS WILL DECREASE FORM
WEST TO EAST THIS AFTERNOON AND THIS EVENING AS THE TROUGH AXIS
MOVES THROUGH THE INTERIOR NORTHWEST. WINDS WILL INCREASE THROUGH
THE MORNING, PEAKING IN THE AFTERNOON AND EARLY EVENING. SUSTAINED
SPEEDS WILL MAINLY RUN BETWEEN 15 AND 30 MPH. THE STRONGEST WINDS
WILL BE IN THE KITTITAS VALLEY AND WILL ISSUE A WIND ADVISORY FOR
THIS ZONE. SNOW LEVELS WILL GRADUALLY FALL TODAY. SNOW LEVELS WILL
FALL TO AROUND 3500 FEET THIS MORNING OVER CENTRAL OREGON AND
CENTRAL WASHINGTON. THIS LEVELS WILL INCREASE SLIGHTLY IN THE
AFTERNOON. ELSEWHERE SNOW LEVELS WILL RUN BETWEEN 4500 AND 6000 FEET
THIS MORNING, AND BETWEEN 4500 AND 5000 FEET THIS AFTERNOON. EXPECT
LIGHT SNOW AMOUNTS OF 3 INCHES OR LESS AT THE HIGHER ELEVATIONS
TODAY. ANOTHER WEAK DISTURBANCE WILL BRING AN INCREASE IN SHOWER
ACTIVITY OVERNIGHT. ONSHORE FLOW WEDNESDAY WILL KEEP VARYING CHANCES
OF SHOWERS GOING THROUGH THE DAY, WITH THE BEST CHANCES OVER THE
MOUNTAINS. SNOW LEVELS OVERNIGHT TONIGHT INTO EARLY WEDNESDAY WILL
RUN AROUND 3000 FEET, THEN RISE TO BETWEEN 4000 AND 4500 FEET
WEDNESDAY AFTERNOON. PRECIP AMOUNTS WILL BE LIGHT, THUS SNOW AMOUNTS
WILL BE LIMITED. 90


.LONG TERM...WEDNESDAY NIGHT THROUGH TUESDAY...A WEAK TRANSITORY
RIDGE WILL CROSS THE AREA WEDNESDAY NIGHT AS A TROUGH CONTINUES TO
MOVE OFF INTO THE ROCKIES. LINGERING SHOWERS AND A MOIST WESTERLY
FLOW WILL KEEP A CHANCE OF CHANCE OF RAIN IN THE MOUNTAINS AND A
SLIGHT CHANCE OF RAIN IN THE COLUMBIA BASIN. ON THURSDAY A DEEP
UPPER LEVEL TROUGH WILL PUSH A FRONT ACROSS THE AREA WITH A GENEROUS
HELPING OF RAIN EXPECTED ACROSS THE AREA. LOWER ELEVATIONS WILL SEE
AROUND A QUARTER OF AN INCH AND UP HALF AN INCH IS EXPECTED IN THE
MOUNTAINS. THERE WILL ALSO BE SOME INSTABILITY IN THE EASTERN
MOUNTAINS, SO HAVE ADDED A SLIGHT CHANCE OF THUNDERSTORMS THERE IN
THE AFTERNOON AND EVENING. THE RAIN WILL TAPER OFF TO SHOWERS
THURSDAY NIGHT. THE TROUGH WILL REMAIN OVER THE AREA FRIDAY AND
FRIDAY NIGHT AND THE UNSETTLED CONDITIONS WILL CONTINUE WITH LIGHT
RAIN AND MOUNTAIN SNOW SHOWERS THROUGH FRIDAY NIGHT. SNOW LEVELS
FRIDAY WILL DROP TO AROUND 4000-4500 FEET SO LOCATIONS ABOVE THAT
ELEVATION MAY SEE AN INCH OR SO OF SNOW. ON SATURDAY MOST OF THE
ENERGY IN THE TROUGH WILL MOVE EAST BUT WITH THE TROUGH AND MOISTURE
STILL OVER THE AREA HAVE CONTINUED A SLIGHT CHANCE OF RAIN SHOWERS
IN THE LOWER ELEVATIONS AND A CHANCE OF RAIN AND SNOW SHOWERS IN THE
MOUNTAINS THROUGH SATURDAY NIGHT. MODELS SHOW ANOTHER FRONT ARRIVING
SUNDAY BUT DISAGREE AS TO ITS STRENGTH. THE GFS HAS IT SPLIT AND
FALL APART WHILE THE THE ECMWF KEEPS IT INTACT. GIVEN THE
DIFFERENCES, HAVE KEPT A SLIGHT CHANCE OF RAIN SHOWERS IN THE LOWER
ELEVATIONS AND A CHANCE OF RAIN SHOWERS IN THE MOUNTAINS. MODELS
THEN BEGIN TO SHOW RIDGING DEVELOPING MONDAY THROUGH TUESDAY. HAVE
TO BEGUN TO DRY OUT THE FORECAST MONDAY THROUGH TUESDAY. PERRY.

&&

.AVIATION...12Z TAFS...RAIN HAS SPREAD ACROSS THE AREA EARLY THIS
MORNING AND WILL SOON BEGIN TAPERING OFF FROM CENTRAL OREGON
NORTHEASTWARD. IT WILL END AT WESTERN TAF SITES KRDM, KBDN KDLS AND
KYKM FROM 14Z-17Z AND AT KPSC, KALW AND KPDT AROUND 20Z. OCCASIONAL
MVFR CEILINGS WILL CONTINUE UNTIL THEN WITH THE HEAVIER SHOWERS.
THIS AFTERNOON CEILINGS WILL BECOME SCATTERED TO BROKEN ABOVE 5000
FEET AGL. CEILINGS WILL BEGIN LOWERING LATE THIS EVENING AND
OVERNIGHT WITH ANOTHER WEAK DISTURBANCE CROSSES THE AREA BUT
CEILINGS WILL REMAIN AT VFR LEVELS. MORE SHOWERS WILL DEVELOP AFTER
06Z WITH A RAIN/SNOW MIX POSSIBLE AT KRDM AND KBDN. WINDS WILL
INCREASE THIS MORNING AND REACH 15 TO 25 KTS WITH GUSTS TO 35 KTS
THIS AFTERNOON THEN DECREASE TO 5 TO 15 KTS WITH GUSTS TO 20 KTS
AFTER 06Z TONIGHT. PERRY

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  55  39  58  44 /  80  30  30  60
ALW  55  43  57  46 /  80  40  30  50
PSC  62  43  63  49 /  70  20  30  50
YKM  60  37  59  40 /  60  20  20  50
HRI  60  41  62  46 /  70  20  30  50
ELN  56  38  58  39 /  60  20  20  50
RDM  51  31  55  37 /  70  30  30  60
LGD  50  36  53  40 /  80  40  40  70
GCD  51  33  54  36 /  80  40  40  60
DLS  58  42  61  46 /  60  30  40  70

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...NONE.
WA...WIND ADVISORY FROM 11 AM THIS MORNING TO 8 PM PDT THIS EVENING
     WAZ026.

&&

THREAT INDEX
TODAY : GREEN
WEDNESDAY : GREEN
THURSDAY : GREEN

GREEN: NONE OR LIMITED NEED FOR WATCHES, WARNINGS, OR ADVISORIES.
YELLOW: A FEW WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.
RED: NUMEROUS WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

90/83/83







000
FXUS66 KPDT 221209 AAA
AFDPDT

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE PENDLETON OR
509 AM PDT TUE APR 22 2014

UPDATED AVIATION DISCUSSION

.SHORT TERM...TODAY THROUGH WEDNESDAY...AN UPPER TROUGH IS CURRENTLY
NEARING THE PACIFIC NORTHWEST COAST EARLY THIS MORNING. THE SYSTEM`S
COLD FRONT IS JUST AHEAD OF THE UPPER TROUGH AXIS, CURRENTLY MOVING
INTO THE WILLAMETTE VALLEY AND PUGET SOUND. AS SUCH WILL SEE A
GRADUAL DECREASE IN PRECIP THROUGH MID MORNING FROM CENTRAL
WASHINGTON SOUTH TO CENTRAL OREGON. MEANWHILE PRECIP WILL CONTINUE
OR INCREASE ELSEWHERE INTO MID MORNING. SHOWERS WILL DECREASE FORM
WEST TO EAST THIS AFTERNOON AND THIS EVENING AS THE TROUGH AXIS
MOVES THROUGH THE INTERIOR NORTHWEST. WINDS WILL INCREASE THROUGH
THE MORNING, PEAKING IN THE AFTERNOON AND EARLY EVENING. SUSTAINED
SPEEDS WILL MAINLY RUN BETWEEN 15 AND 30 MPH. THE STRONGEST WINDS
WILL BE IN THE KITTITAS VALLEY AND WILL ISSUE A WIND ADVISORY FOR
THIS ZONE. SNOW LEVELS WILL GRADUALLY FALL TODAY. SNOW LEVELS WILL
FALL TO AROUND 3500 FEET THIS MORNING OVER CENTRAL OREGON AND
CENTRAL WASHINGTON. THIS LEVELS WILL INCREASE SLIGHTLY IN THE
AFTERNOON. ELSEWHERE SNOW LEVELS WILL RUN BETWEEN 4500 AND 6000 FEET
THIS MORNING, AND BETWEEN 4500 AND 5000 FEET THIS AFTERNOON. EXPECT
LIGHT SNOW AMOUNTS OF 3 INCHES OR LESS AT THE HIGHER ELEVATIONS
TODAY. ANOTHER WEAK DISTURBANCE WILL BRING AN INCREASE IN SHOWER
ACTIVITY OVERNIGHT. ONSHORE FLOW WEDNESDAY WILL KEEP VARYING CHANCES
OF SHOWERS GOING THROUGH THE DAY, WITH THE BEST CHANCES OVER THE
MOUNTAINS. SNOW LEVELS OVERNIGHT TONIGHT INTO EARLY WEDNESDAY WILL
RUN AROUND 3000 FEET, THEN RISE TO BETWEEN 4000 AND 4500 FEET
WEDNESDAY AFTERNOON. PRECIP AMOUNTS WILL BE LIGHT, THUS SNOW AMOUNTS
WILL BE LIMITED. 90


.LONG TERM...WEDNESDAY NIGHT THROUGH TUESDAY...A WEAK TRANSITORY
RIDGE WILL CROSS THE AREA WEDNESDAY NIGHT AS A TROUGH CONTINUES TO
MOVE OFF INTO THE ROCKIES. LINGERING SHOWERS AND A MOIST WESTERLY
FLOW WILL KEEP A CHANCE OF CHANCE OF RAIN IN THE MOUNTAINS AND A
SLIGHT CHANCE OF RAIN IN THE COLUMBIA BASIN. ON THURSDAY A DEEP
UPPER LEVEL TROUGH WILL PUSH A FRONT ACROSS THE AREA WITH A GENEROUS
HELPING OF RAIN EXPECTED ACROSS THE AREA. LOWER ELEVATIONS WILL SEE
AROUND A QUARTER OF AN INCH AND UP HALF AN INCH IS EXPECTED IN THE
MOUNTAINS. THERE WILL ALSO BE SOME INSTABILITY IN THE EASTERN
MOUNTAINS, SO HAVE ADDED A SLIGHT CHANCE OF THUNDERSTORMS THERE IN
THE AFTERNOON AND EVENING. THE RAIN WILL TAPER OFF TO SHOWERS
THURSDAY NIGHT. THE TROUGH WILL REMAIN OVER THE AREA FRIDAY AND
FRIDAY NIGHT AND THE UNSETTLED CONDITIONS WILL CONTINUE WITH LIGHT
RAIN AND MOUNTAIN SNOW SHOWERS THROUGH FRIDAY NIGHT. SNOW LEVELS
FRIDAY WILL DROP TO AROUND 4000-4500 FEET SO LOCATIONS ABOVE THAT
ELEVATION MAY SEE AN INCH OR SO OF SNOW. ON SATURDAY MOST OF THE
ENERGY IN THE TROUGH WILL MOVE EAST BUT WITH THE TROUGH AND MOISTURE
STILL OVER THE AREA HAVE CONTINUED A SLIGHT CHANCE OF RAIN SHOWERS
IN THE LOWER ELEVATIONS AND A CHANCE OF RAIN AND SNOW SHOWERS IN THE
MOUNTAINS THROUGH SATURDAY NIGHT. MODELS SHOW ANOTHER FRONT ARRIVING
SUNDAY BUT DISAGREE AS TO ITS STRENGTH. THE GFS HAS IT SPLIT AND
FALL APART WHILE THE THE ECMWF KEEPS IT INTACT. GIVEN THE
DIFFERENCES, HAVE KEPT A SLIGHT CHANCE OF RAIN SHOWERS IN THE LOWER
ELEVATIONS AND A CHANCE OF RAIN SHOWERS IN THE MOUNTAINS. MODELS
THEN BEGIN TO SHOW RIDGING DEVELOPING MONDAY THROUGH TUESDAY. HAVE
TO BEGUN TO DRY OUT THE FORECAST MONDAY THROUGH TUESDAY. PERRY.

&&

.AVIATION...12Z TAFS...RAIN HAS SPREAD ACROSS THE AREA EARLY THIS
MORNING AND WILL SOON BEGIN TAPERING OFF FROM CENTRAL OREGON
NORTHEASTWARD. IT WILL END AT WESTERN TAF SITES KRDM, KBDN KDLS AND
KYKM FROM 14Z-17Z AND AT KPSC, KALW AND KPDT AROUND 20Z. OCCASIONAL
MVFR CEILINGS WILL CONTINUE UNTIL THEN WITH THE HEAVIER SHOWERS.
THIS AFTERNOON CEILINGS WILL BECOME SCATTERED TO BROKEN ABOVE 5000
FEET AGL. CEILINGS WILL BEGIN LOWERING LATE THIS EVENING AND
OVERNIGHT WITH ANOTHER WEAK DISTURBANCE CROSSES THE AREA BUT
CEILINGS WILL REMAIN AT VFR LEVELS. MORE SHOWERS WILL DEVELOP AFTER
06Z WITH A RAIN/SNOW MIX POSSIBLE AT KRDM AND KBDN. WINDS WILL
INCREASE THIS MORNING AND REACH 15 TO 25 KTS WITH GUSTS TO 35 KTS
THIS AFTERNOON THEN DECREASE TO 5 TO 15 KTS WITH GUSTS TO 20 KTS
AFTER 06Z TONIGHT. PERRY

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  55  39  58  44 /  80  30  30  60
ALW  55  43  57  46 /  80  40  30  50
PSC  62  43  63  49 /  70  20  30  50
YKM  60  37  59  40 /  60  20  20  50
HRI  60  41  62  46 /  70  20  30  50
ELN  56  38  58  39 /  60  20  20  50
RDM  51  31  55  37 /  70  30  30  60
LGD  50  36  53  40 /  80  40  40  70
GCD  51  33  54  36 /  80  40  40  60
DLS  58  42  61  46 /  60  30  40  70

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...NONE.
WA...WIND ADVISORY FROM 11 AM THIS MORNING TO 8 PM PDT THIS EVENING
     WAZ026.

&&

THREAT INDEX
TODAY : GREEN
WEDNESDAY : GREEN
THURSDAY : GREEN

GREEN: NONE OR LIMITED NEED FOR WATCHES, WARNINGS, OR ADVISORIES.
YELLOW: A FEW WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.
RED: NUMEROUS WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

90/83/83








000
FXUS66 KPDT 221005
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
300 AM PDT TUE APR 22 2014

.SHORT TERM...TODAY THROUGH WEDNESDAY...AN UPPER TROUGH IS CURRENTLY
NEARING THE PACIFIC NORTHWEST COAST EARLY THIS MORNING. THE SYSTEM`S
COLD FRONT IS JUST AHEAD OF THE UPPER TROUGH AXIS, CURRENTLY MOVING
INTO THE WILLAMETTE VALLEY AND PUGET SOUND. AS SUCH WILL SEE A
GRADUAL DECREASE IN PRECIP THROUGH MID MORNING FROM CENTRAL
WASHINGTON SOUTH TO CENTRAL OREGON. MEANWHILE PRECIP WILL CONTINUE
OR INCREASE ELSEWHERE INTO MID MORNING. SHOWERS WILL DECREASE FORM
WEST TO EAST THIS AFTERNOON AND THIS EVENING AS THE TROUGH AXIS
MOVES THROUGH THE INTERIOR NORTHWEST. WINDS WILL INCREASE THROUGH
THE MORNING, PEAKING IN THE AFTERNOON AND EARLY EVENING. SUSTAINED
SPEEDS WILL MAINLY RUN BETWEEN 15 AND 30 MPH. THE STRONGEST WINDS
WILL BE IN THE KITTITAS VALLEY AND WILL ISSUE A WIND ADVISORY FOR
THIS ZONE. SNOW LEVELS WILL GRADUALLY FALL TODAY. SNOW LEVELS WILL
FALL TO AROUND 3500 FEET THIS MORNING OVER CENTRAL OREGON AND
CENTRAL WASHINGTON. THIS LEVELS WILL INCREASE SLIGHTLY IN THE
AFTERNOON. ELSEWHERE SNOW LEVELS WILL RUN BETWEEN 4500 AND 6000 FEET
THIS MORNING, AND BETWEEN 4500 AND 5000 FEET THIS AFTERNOON. EXPECT
LIGHT SNOW AMOUNTS OF 3 INCHES OR LESS AT THE HIGHER ELEVATIONS
TODAY. ANOTHER WEAK DISTURBANCE WILL BRING AN INCREASE IN SHOWER
ACTIVITY OVERNIGHT. ONSHORE FLOW WEDNESDAY WILL KEEP VARYING CHANCES
OF SHOWERS GOING THROUGH THE DAY, WITH THE BEST CHANCES OVER THE
MOUNTAINS. SNOW LEVELS OVERNIGHT TONIGHT INTO EARLY WEDNESDAY WILL
RUN AROUND 3000 FEET, THEN RISE TO BETWEEN 4000 AND 4500 FEET
WEDNESDAY AFTERNOON. PRECIP AMOUNTS WILL BE LIGHT, THUS SNOW AMOUNTS
WILL BE LIMITED. 90


.LONG TERM...WEDNESDAY NIGHT THROUGH TUESDAY...A WEAK TRANSITORY
RIDGE WILL CROSS THE AREA WEDNESDAY NIGHT AS A TROUGH CONTINUES TO
MOVE OFF INTO THE ROCKIES. LINGERING SHOWERS AND A MOIST WESTERLY
FLOW WILL KEEP A CHANCE OF CHANCE OF RAIN IN THE MOUNTAINS AND A
SLIGHT CHANCE OF RAIN IN THE COLUMBIA BASIN. ON THURSDAY A DEEP
UPPER LEVEL TROUGH WILL PUSH A FRONT ACROSS THE AREA WITH A GENEROUS
HELPING OF RAIN EXPECTED ACROSS THE AREA. LOWER ELEVATIONS WILL SEE
AROUND A QUARTER OF AN INCH AND UP HALF AN INCH IS EXPECTED IN THE
MOUNTAINS. THERE WILL ALSO BE SOME INSTABILITY IN THE EASTERN
MOUNTAINS, SO HAVE ADDED A SLIGHT CHANCE OF THUNDERSTORMS THERE IN
THE AFTERNOON AND EVENING. THE RAIN WILL TAPER OFF TO SHOWERS
THURSDAY NIGHT. THE TROUGH WILL REMAIN OVER THE AREA FRIDAY AND
FRIDAY NIGHT AND THE UNSETTLED CONDITIONS WILL CONTINUE WITH LIGHT
RAIN AND MOUNTAIN SNOW SHOWERS THROUGH FRIDAY NIGHT. SNOW LEVELS
FRIDAY WILL DROP TO AROUND 4000-4500 FEET SO LOCATIONS ABOVE THAT
ELEVATION MAY SEE AN INCH OR SO OF SNOW. ON SATURDAY MOST OF THE
ENERGY IN THE TROUGH WILL MOVE EAST BUT WITH THE TROUGH AND MOISTURE
STILL OVER THE AREA HAVE CONTINUED A SLIGHT CHANCE OF RAIN SHOWERS
IN THE LOWER ELEVATIONS AND A CHANCE OF RAIN AND SNOW SHOWERS IN THE
MOUNTAINS THROUGH SATURDAY NIGHT. MODELS SHOW ANOTHER FRONT ARRIVING
SUNDAY BUT DISAGREE AS TO ITS STRENGTH. THE GFS HAS IT SPLIT AND
FALL APART WHILE THE THE ECMWF KEEPS IT INTACT. GIVEN THE
DIFFERENCES, HAVE KEPT A SLIGHT CHANCE OF RAIN SHOWERS IN THE LOWER
ELEVATIONS AND A CHANCE OF RAIN SHOWERS IN THE MOUNTAINS. MODELS
THEN BEGIN TO SHOW RIDGING DEVELOPING MONDAY THROUGH TUESDAY. HAVE
TO BEGUN TO DRY OUT THE FORECAST MONDAY THROUGH TUESDAY. PERRY.

&&

.AVIATION...PREVIOUS DISCUSSION...06Z TAFS...RAIN WILL SPREAD NEWD
ACROSS THE ENTIRE AREA TONIGHT AND END FROM WEST TO EAST TUESDAY.
MUCH OF THE RAIN WILL PUSH EAST OF THE TAF SITES BY 21Z TUESDAY.
MOSTLY VFR CONDITIONS ARE EXPECTED WITH CEILINGS 4-7 THOUSAND FEET
AGL. HOWEVER IN HEAVIER RAIN VSBYS AND CEILINGS MAY LOWER TO MVFR.
WINDS WILL BE MOSTLY FROM THE WEST TONIGHT AROUND 10 KT BUT AFTER
15Z TUESDAY INCREASE TO 15-25 KT WITH HIGHER GUSTS.


&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  55  39  58  44 /  80  30  30  60
ALW  55  43  57  46 /  80  40  30  50
PSC  62  43  63  49 /  70  20  30  50
YKM  60  37  59  40 /  60  20  20  50
HRI  60  41  62  46 /  70  20  30  50
ELN  56  38  58  39 /  60  20  20  50
RDM  51  31  55  37 /  70  30  30  60
LGD  50  36  53  40 /  80  40  40  70
GCD  51  33  54  36 /  80  40  40  60
DLS  58  42  61  46 /  60  30  40  70

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...NONE.
WA...WIND ADVISORY FROM 11 AM THIS MORNING TO 8 PM PDT THIS EVENING
     WAZ026.

&&

THREAT INDEX
TODAY : GREEN
WEDNESDAY : GREEN
THURSDAY : GREEN

GREEN: NONE OR LIMITED NEED FOR WATCHES, WARNINGS, OR ADVISORIES.
YELLOW: A FEW WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.
RED: NUMEROUS WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

90/83/83










000
FXUS66 KPDT 221005
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
300 AM PDT TUE APR 22 2014

.SHORT TERM...TODAY THROUGH WEDNESDAY...AN UPPER TROUGH IS CURRENTLY
NEARING THE PACIFIC NORTHWEST COAST EARLY THIS MORNING. THE SYSTEM`S
COLD FRONT IS JUST AHEAD OF THE UPPER TROUGH AXIS, CURRENTLY MOVING
INTO THE WILLAMETTE VALLEY AND PUGET SOUND. AS SUCH WILL SEE A
GRADUAL DECREASE IN PRECIP THROUGH MID MORNING FROM CENTRAL
WASHINGTON SOUTH TO CENTRAL OREGON. MEANWHILE PRECIP WILL CONTINUE
OR INCREASE ELSEWHERE INTO MID MORNING. SHOWERS WILL DECREASE FORM
WEST TO EAST THIS AFTERNOON AND THIS EVENING AS THE TROUGH AXIS
MOVES THROUGH THE INTERIOR NORTHWEST. WINDS WILL INCREASE THROUGH
THE MORNING, PEAKING IN THE AFTERNOON AND EARLY EVENING. SUSTAINED
SPEEDS WILL MAINLY RUN BETWEEN 15 AND 30 MPH. THE STRONGEST WINDS
WILL BE IN THE KITTITAS VALLEY AND WILL ISSUE A WIND ADVISORY FOR
THIS ZONE. SNOW LEVELS WILL GRADUALLY FALL TODAY. SNOW LEVELS WILL
FALL TO AROUND 3500 FEET THIS MORNING OVER CENTRAL OREGON AND
CENTRAL WASHINGTON. THIS LEVELS WILL INCREASE SLIGHTLY IN THE
AFTERNOON. ELSEWHERE SNOW LEVELS WILL RUN BETWEEN 4500 AND 6000 FEET
THIS MORNING, AND BETWEEN 4500 AND 5000 FEET THIS AFTERNOON. EXPECT
LIGHT SNOW AMOUNTS OF 3 INCHES OR LESS AT THE HIGHER ELEVATIONS
TODAY. ANOTHER WEAK DISTURBANCE WILL BRING AN INCREASE IN SHOWER
ACTIVITY OVERNIGHT. ONSHORE FLOW WEDNESDAY WILL KEEP VARYING CHANCES
OF SHOWERS GOING THROUGH THE DAY, WITH THE BEST CHANCES OVER THE
MOUNTAINS. SNOW LEVELS OVERNIGHT TONIGHT INTO EARLY WEDNESDAY WILL
RUN AROUND 3000 FEET, THEN RISE TO BETWEEN 4000 AND 4500 FEET
WEDNESDAY AFTERNOON. PRECIP AMOUNTS WILL BE LIGHT, THUS SNOW AMOUNTS
WILL BE LIMITED. 90


.LONG TERM...WEDNESDAY NIGHT THROUGH TUESDAY...A WEAK TRANSITORY
RIDGE WILL CROSS THE AREA WEDNESDAY NIGHT AS A TROUGH CONTINUES TO
MOVE OFF INTO THE ROCKIES. LINGERING SHOWERS AND A MOIST WESTERLY
FLOW WILL KEEP A CHANCE OF CHANCE OF RAIN IN THE MOUNTAINS AND A
SLIGHT CHANCE OF RAIN IN THE COLUMBIA BASIN. ON THURSDAY A DEEP
UPPER LEVEL TROUGH WILL PUSH A FRONT ACROSS THE AREA WITH A GENEROUS
HELPING OF RAIN EXPECTED ACROSS THE AREA. LOWER ELEVATIONS WILL SEE
AROUND A QUARTER OF AN INCH AND UP HALF AN INCH IS EXPECTED IN THE
MOUNTAINS. THERE WILL ALSO BE SOME INSTABILITY IN THE EASTERN
MOUNTAINS, SO HAVE ADDED A SLIGHT CHANCE OF THUNDERSTORMS THERE IN
THE AFTERNOON AND EVENING. THE RAIN WILL TAPER OFF TO SHOWERS
THURSDAY NIGHT. THE TROUGH WILL REMAIN OVER THE AREA FRIDAY AND
FRIDAY NIGHT AND THE UNSETTLED CONDITIONS WILL CONTINUE WITH LIGHT
RAIN AND MOUNTAIN SNOW SHOWERS THROUGH FRIDAY NIGHT. SNOW LEVELS
FRIDAY WILL DROP TO AROUND 4000-4500 FEET SO LOCATIONS ABOVE THAT
ELEVATION MAY SEE AN INCH OR SO OF SNOW. ON SATURDAY MOST OF THE
ENERGY IN THE TROUGH WILL MOVE EAST BUT WITH THE TROUGH AND MOISTURE
STILL OVER THE AREA HAVE CONTINUED A SLIGHT CHANCE OF RAIN SHOWERS
IN THE LOWER ELEVATIONS AND A CHANCE OF RAIN AND SNOW SHOWERS IN THE
MOUNTAINS THROUGH SATURDAY NIGHT. MODELS SHOW ANOTHER FRONT ARRIVING
SUNDAY BUT DISAGREE AS TO ITS STRENGTH. THE GFS HAS IT SPLIT AND
FALL APART WHILE THE THE ECMWF KEEPS IT INTACT. GIVEN THE
DIFFERENCES, HAVE KEPT A SLIGHT CHANCE OF RAIN SHOWERS IN THE LOWER
ELEVATIONS AND A CHANCE OF RAIN SHOWERS IN THE MOUNTAINS. MODELS
THEN BEGIN TO SHOW RIDGING DEVELOPING MONDAY THROUGH TUESDAY. HAVE
TO BEGUN TO DRY OUT THE FORECAST MONDAY THROUGH TUESDAY. PERRY.

&&

.AVIATION...PREVIOUS DISCUSSION...06Z TAFS...RAIN WILL SPREAD NEWD
ACROSS THE ENTIRE AREA TONIGHT AND END FROM WEST TO EAST TUESDAY.
MUCH OF THE RAIN WILL PUSH EAST OF THE TAF SITES BY 21Z TUESDAY.
MOSTLY VFR CONDITIONS ARE EXPECTED WITH CEILINGS 4-7 THOUSAND FEET
AGL. HOWEVER IN HEAVIER RAIN VSBYS AND CEILINGS MAY LOWER TO MVFR.
WINDS WILL BE MOSTLY FROM THE WEST TONIGHT AROUND 10 KT BUT AFTER
15Z TUESDAY INCREASE TO 15-25 KT WITH HIGHER GUSTS.


&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  55  39  58  44 /  80  30  30  60
ALW  55  43  57  46 /  80  40  30  50
PSC  62  43  63  49 /  70  20  30  50
YKM  60  37  59  40 /  60  20  20  50
HRI  60  41  62  46 /  70  20  30  50
ELN  56  38  58  39 /  60  20  20  50
RDM  51  31  55  37 /  70  30  30  60
LGD  50  36  53  40 /  80  40  40  70
GCD  51  33  54  36 /  80  40  40  60
DLS  58  42  61  46 /  60  30  40  70

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...NONE.
WA...WIND ADVISORY FROM 11 AM THIS MORNING TO 8 PM PDT THIS EVENING
     WAZ026.

&&

THREAT INDEX
TODAY : GREEN
WEDNESDAY : GREEN
THURSDAY : GREEN

GREEN: NONE OR LIMITED NEED FOR WATCHES, WARNINGS, OR ADVISORIES.
YELLOW: A FEW WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.
RED: NUMEROUS WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

90/83/83









000
FXUS66 KPDT 220318 AAA
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
817 PM PDT MON APR 21 2014

UPDATED AVIATION DISCUSSION

.SHORT TERM...LARGE UPPER LEVEL TROUGH AND COLD FRONT MOVING INTO
THE PACIFIC NORTHWEST. THE COLD FRONT IS MOVING SLOWLY TO THE EAST
AND WILL CROSS THE FORECAST AREA OVERNIGHT INTO TUESDAY MORNING.
STRONG UPPER LEVEL JET AND SHORT WAVE ARE CAUSING CLOUDS TO INCREASE
THIS EVENING ALONG WITH SOME RAIN. SATELLITE AND MODELS SUGGEST THIS
TREND WILL CONTINUE. EXPECT ALL AREAS WILL SEE RAIN OVER THE NEXT
6-12 HOURS WITH THE FRONTAL BOUNDARY. PRECIPITATION WILL THEN CHANGE
OVER TO SHOWERS AS THE COLD UPPER LEVEL TROUGH WILL BE OVER THE
REGION. TEMPERATURES TONIGHT WILL BE FAIRLY MILD DUE TO CLOUD COVER
WITH LOWS MOSTLY IN THE 40S. HOWEVER MUCH COOLER ON TUESDAY AS
COMPARED WITH TODAY. HIGHS WILL BE DOWN 5-15 DEGREES. AFTER THE
FRONT MOVES THROUGH WESTERLY WINDS WILL INCREASE WITH BREEZY TO
LOCALLY WINDY CONDITIONS LATER TONIGHT INTO TUESDAY EVENING.  94

&&

.AVIATION...06Z TAFS...RAIN WILL SPREAD NEWD ACROSS THE ENTIRE AREA
TONIGHT AND END FROM WEST TO EAST TUESDAY. MUCH OF THE RAIN WILL
PUSH EAST OF THE TAF SITES BY 21Z TUESDAY. MOSTLY VFR CONDITIONS ARE
EXPECTED WITH CEILINGS 4-7 THOUSAND FEET AGL. HOWEVER IN HEAVIER
RAIN VSBYS AND CEILINGS MAY LOWER TO MVFR. WINDS WILL BE MOSTLY FROM
THE WEST TONIGHT AROUND 10 KT BUT AFTER 15Z TUESDAY INCREASE TO
15-25 KT WITH HIGHER GUSTS.

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  44  56  39  56 /  60  80  30  30
ALW  47  57  42  56 /  60  80  40  30
PSC  48  61  44  60 /  60  70  20  20
YKM  44  57  36  58 /  70  60  20  20
HRI  47  59  41  59 /  60  80  20  30
ELN  41  55  36  57 /  70  70  20  20
RDM  39  49  30  55 /  70  80  30  30
LGD  42  49  36  52 /  50  80  40  40
GCD  40  46  30  48 /  50  80  40  40
DLS  47  57  42  59 /  80  80  30  40

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...NONE.
WA...NONE.
&&

THREAT INDEX
TUESDAY : GREEN
WEDNESDAY : GREEN
THURSDAY : GREEN

GREEN: NONE OR LIMITED NEED FOR WATCHES, WARNINGS, OR ADVISORIES.
YELLOW: A FEW WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.
RED: NUMEROUS WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$








000
FXUS66 KPDT 220318 AAA
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
817 PM PDT MON APR 21 2014

UPDATED AVIATION DISCUSSION

.SHORT TERM...LARGE UPPER LEVEL TROUGH AND COLD FRONT MOVING INTO
THE PACIFIC NORTHWEST. THE COLD FRONT IS MOVING SLOWLY TO THE EAST
AND WILL CROSS THE FORECAST AREA OVERNIGHT INTO TUESDAY MORNING.
STRONG UPPER LEVEL JET AND SHORT WAVE ARE CAUSING CLOUDS TO INCREASE
THIS EVENING ALONG WITH SOME RAIN. SATELLITE AND MODELS SUGGEST THIS
TREND WILL CONTINUE. EXPECT ALL AREAS WILL SEE RAIN OVER THE NEXT
6-12 HOURS WITH THE FRONTAL BOUNDARY. PRECIPITATION WILL THEN CHANGE
OVER TO SHOWERS AS THE COLD UPPER LEVEL TROUGH WILL BE OVER THE
REGION. TEMPERATURES TONIGHT WILL BE FAIRLY MILD DUE TO CLOUD COVER
WITH LOWS MOSTLY IN THE 40S. HOWEVER MUCH COOLER ON TUESDAY AS
COMPARED WITH TODAY. HIGHS WILL BE DOWN 5-15 DEGREES. AFTER THE
FRONT MOVES THROUGH WESTERLY WINDS WILL INCREASE WITH BREEZY TO
LOCALLY WINDY CONDITIONS LATER TONIGHT INTO TUESDAY EVENING.  94

&&

.AVIATION...06Z TAFS...RAIN WILL SPREAD NEWD ACROSS THE ENTIRE AREA
TONIGHT AND END FROM WEST TO EAST TUESDAY. MUCH OF THE RAIN WILL
PUSH EAST OF THE TAF SITES BY 21Z TUESDAY. MOSTLY VFR CONDITIONS ARE
EXPECTED WITH CEILINGS 4-7 THOUSAND FEET AGL. HOWEVER IN HEAVIER
RAIN VSBYS AND CEILINGS MAY LOWER TO MVFR. WINDS WILL BE MOSTLY FROM
THE WEST TONIGHT AROUND 10 KT BUT AFTER 15Z TUESDAY INCREASE TO
15-25 KT WITH HIGHER GUSTS.

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  44  56  39  56 /  60  80  30  30
ALW  47  57  42  56 /  60  80  40  30
PSC  48  61  44  60 /  60  70  20  20
YKM  44  57  36  58 /  70  60  20  20
HRI  47  59  41  59 /  60  80  20  30
ELN  41  55  36  57 /  70  70  20  20
RDM  39  49  30  55 /  70  80  30  30
LGD  42  49  36  52 /  50  80  40  40
GCD  40  46  30  48 /  50  80  40  40
DLS  47  57  42  59 /  80  80  30  40

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...NONE.
WA...NONE.
&&

THREAT INDEX
TUESDAY : GREEN
WEDNESDAY : GREEN
THURSDAY : GREEN

GREEN: NONE OR LIMITED NEED FOR WATCHES, WARNINGS, OR ADVISORIES.
YELLOW: A FEW WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.
RED: NUMEROUS WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$









000
FXUS66 KPDT 220223
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
722 PM PDT MON APR 21 2014

.SHORT TERM...LARGE UPPER LEVEL TROUGH AND COLD FRONT MOVING INTO
THE PACIFIC NORTHWEST. THE COLD FRONT IS MOVING SLOWLY TO THE EAST
AND WILL CROSS THE FORECAST AREA OVERNIGHT INTO TUESDAY MORNING.
STRONG UPPER LEVEL JET AND SHORT WAVE ARE CAUSING CLOUDS TO INCREASE
THIS EVENING ALONG WITH SOME RAIN. SATELLITE AND MODELS SUGGEST THIS
TREND WILL CONTINUE. EXPECT ALL AREAS WILL SEE RAIN OVER THE NEXT
6-12 HOURS WITH THE FRONTAL BOUNDARY. PRECIPITATION WILL THEN CHANGE
OVER TO SHOWERS AS THE COLD UPPER LEVEL TROUGH WILL BE OVER THE
REGION. TEMPERATURES TONIGHT WILL BE FAIRLY MILD DUE TO CLOUD COVER
WITH LOWS MOSTLY IN THE 40S. HOWEVER MUCH COOLER ON TUESDAY AS
COMPARED WITH TODAY. HIGHS WILL BE DOWN 5-15 DEGREES. AFTER THE
FRONT MOVES THROUGH WESTERLY WINDS WILL INCREASE WITH BREEZY TO
LOCALLY WINDY CONDITIONS LATER TONIGHT INTO TUESDAY EVENING.  94

&&

.PREV DISC... /ISSUED 410 PM PDT MON APR 21 2014/

SHORT TERM...TONIGHT THROUGH WEDNESDAY NIGHT. LOW PRESSURE WILL
APPROACH THE TWO STATE AREA WITH INCREASING CLOUDS AND SHOWERS INTO
THIS EVENING. THE SHOWERS OVER THE WA/OR CASCADES WILL MIGRATE EAST
INTO THE BASIN AND BLUE/WALLOWA MOUNTAINS OVERNIGHT AND COVER THE
ENTIRE AREA TOMORROW. AS THE SYSTEM MOVES EAST AND ACROSS THE REGION
TOMORROW...THE AFTERNOON TEMPERATURES WILL BE SEVERAL DEGREES COOLER
ALONG WITH DECREASING RAIN CHANCES. HOWEVER SNOW LEVELS WILL LOWER
AND SOME OF THE HIGHER ELEVATIONS IN THE MOUNTAINS COULD RECEIVE
MINOR SNOW ACCUMULATIONS TUESDAY NIGHT. IN ADDITION PRESSURE
GRADIENTS WILL BE TIGHT AND BREEZY CONDITIONS ARE POSSIBLE.

MEANWHILE ANOTHER LOW PRESSURE SYSTEM WILL NEAR THE TWO STATE AREA
AND INCREASE RAIN CHANCES AGAIN ON WEDNESDAY AND CONTINUE INTO
WEDNESDAY NIGHT.

LONG TERM...THURSDAY THROUGH MONDAY AFTERNOON...RAIN LIKELY FOR
DAYTIME PERIOD FOR THURSDAY BY VIRTUE OF A WARM FRONT AND A COLD
FRONT MOVING ACROSS FORECAST AREA AT A RAPID PACE. THURSDAY NIGHT A
MID/UPPER LEVEL LONG WAVE TROUGH PUSHES A COLD FRONT TO THE CASCADE
CRESTS AND THEN NUDGES THE FRONT INTO FORECAST AREA DURING THE DAY
ON FRIDAY. THE COLD FRONTAL BOUNDARY THEN MOVES SLOWLY ACROSS THE
FORECAST AREA FRIDAY. FRIDAY NIGHT THE COLD FRONT EASES INTO IDAHO
AND WESTERN MONTANA WHILE THE AFOREMENTIONED MID/UPPER TROUGH TAKES
ON A NEGATIVE TILT AS IT SWINGS INLAND OVER THE REGION. THE EASTERN
MOUNTAINS WILL BE ON THE EASTERN FLANK OF THE TROUGH FRIDAY NIGHT
THUS THE BLUE MOUNTAINS AND WALLOWA MOUNTAINS WILL HAVE OROGRAPHIC
SHOWERS THROUGH FRIDAY NIGHT. SATURDAY THE LONG WAVE TROUGH REMAINS
OVER THE REGION WITH AN UPSTREAM MID/UPPER LEVEL SHORT WAVE
APPROACHING THE WESTERN FLANK OF THE TROUGH. KEPT A CHANCE OF
SHOWERS OVER MOUNTAINS ON SATURDAY BY VIRTUE OF THE TROUGH REMAINING
OVER THE INTERIOR PACIFIC NORTHWEST. SATURDAY NIGHT THROUGH SUNDAY
THE UPSTREAM SHORT WAVE MOVES ACROSS THE FORECAST AREA WITH ANOTHER
MID/UPPER SHORT WAVE HOT ON ITS HEALS MOVING INTO FORECAST AREA
SUNDAY NIGHT FOR A CHANCE OF SHOWERS SATURDAY NIGHT THROUGH SUNDAY
NIGHT. MONDAY MODELS HINT AT A WEAK WEATHER SYSTEM MOVING INTO
REGION FOR A CHANCE OF SHOWERS, MAINLY IN THE MOUNTAINS.  POLAN

AVIATION...00Z TAFS...KBDN MAY SEE MVFR TONIGHT FROM 06Z TO 15Z/
22ND. OTHERWISE, VFR CONDITIONS ARE EXPECTED OVER THE NEXT 24 HOURS.
A COLD FRONT WILL SLOWLY APPROACH THE COAST THIS EVENING AND THEN
MOVE INLAND OVERNIGHT. THE FRONT WILL BEGIN MOVING EAST OF THE
CASCADE CRESTS TUESDAY MORNING AT SOME POINT AROUND DAYBREAK.
BKN-OVC CLOUDS WILL BE AT 9000-11000 FT AGL AT KRDM, KBDN AND KDLS,
THEN STEADILY LOWER TO 2000-5000 FEET AFTER 02Z/22ND. I AGAIN
DELAYED THE ONSET OF RAIN UNTIL 02Z-04Z AT KDLS, KYKM, KRDM AND KBDN
AND ALSO SLOWED DOWN THE ARRIVAL AT KPSC, KPDT AND KALW. WIND FLOW
ALOFT IS PARALLEL TO THE COLD FRONT AND THIS WILL DELAY THE ARRIVAL
OF RAIN ASSOCIATED WITH THE FRONT. RAIN, MODERATE AT TIMES, WILL
SPREAD EASTWARD AND ARRIVE AT KPSC, KPDT AND KALW BY 10Z-11Z/22ND
AND WILL CONTINUE THROUGH 18Z/22ND. WINDS WILL REMAIN BELOW 15 KTS
THOUGH A FEW HIGHER GUSTS TO 30 KTS WILL BE POSSIBLE LATE THIS
AFTERNOON INTO EARLY THIS EVENING AT KBDN, KRDM AND KDLS.  POLAN

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  44  56  39  56 /  60  80  30  30
ALW  47  57  42  56 /  60  80  40  30
PSC  48  61  44  60 /  60  70  20  20
YKM  44  57  36  58 /  70  60  20  20
HRI  47  59  41  59 /  60  80  20  30
ELN  41  55  36  57 /  70  70  20  20
RDM  39  49  30  55 /  70  80  30  30
LGD  42  49  36  52 /  50  80  40  40
GCD  40  46  30  48 /  50  80  40  40
DLS  47  57  42  59 /  80  80  30  40

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...NONE.
WA...NONE.
&&

THREAT INDEX
TUESDAY : GREEN
WEDNESDAY : GREEN
THURSDAY : GREEN

GREEN: NONE OR LIMITED NEED FOR WATCHES, WARNINGS, OR ADVISORIES.
YELLOW: A FEW WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.
RED: NUMEROUS WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

94






000
FXUS66 KPDT 220223
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
722 PM PDT MON APR 21 2014

.SHORT TERM...LARGE UPPER LEVEL TROUGH AND COLD FRONT MOVING INTO
THE PACIFIC NORTHWEST. THE COLD FRONT IS MOVING SLOWLY TO THE EAST
AND WILL CROSS THE FORECAST AREA OVERNIGHT INTO TUESDAY MORNING.
STRONG UPPER LEVEL JET AND SHORT WAVE ARE CAUSING CLOUDS TO INCREASE
THIS EVENING ALONG WITH SOME RAIN. SATELLITE AND MODELS SUGGEST THIS
TREND WILL CONTINUE. EXPECT ALL AREAS WILL SEE RAIN OVER THE NEXT
6-12 HOURS WITH THE FRONTAL BOUNDARY. PRECIPITATION WILL THEN CHANGE
OVER TO SHOWERS AS THE COLD UPPER LEVEL TROUGH WILL BE OVER THE
REGION. TEMPERATURES TONIGHT WILL BE FAIRLY MILD DUE TO CLOUD COVER
WITH LOWS MOSTLY IN THE 40S. HOWEVER MUCH COOLER ON TUESDAY AS
COMPARED WITH TODAY. HIGHS WILL BE DOWN 5-15 DEGREES. AFTER THE
FRONT MOVES THROUGH WESTERLY WINDS WILL INCREASE WITH BREEZY TO
LOCALLY WINDY CONDITIONS LATER TONIGHT INTO TUESDAY EVENING.  94

&&

.PREV DISC... /ISSUED 410 PM PDT MON APR 21 2014/

SHORT TERM...TONIGHT THROUGH WEDNESDAY NIGHT. LOW PRESSURE WILL
APPROACH THE TWO STATE AREA WITH INCREASING CLOUDS AND SHOWERS INTO
THIS EVENING. THE SHOWERS OVER THE WA/OR CASCADES WILL MIGRATE EAST
INTO THE BASIN AND BLUE/WALLOWA MOUNTAINS OVERNIGHT AND COVER THE
ENTIRE AREA TOMORROW. AS THE SYSTEM MOVES EAST AND ACROSS THE REGION
TOMORROW...THE AFTERNOON TEMPERATURES WILL BE SEVERAL DEGREES COOLER
ALONG WITH DECREASING RAIN CHANCES. HOWEVER SNOW LEVELS WILL LOWER
AND SOME OF THE HIGHER ELEVATIONS IN THE MOUNTAINS COULD RECEIVE
MINOR SNOW ACCUMULATIONS TUESDAY NIGHT. IN ADDITION PRESSURE
GRADIENTS WILL BE TIGHT AND BREEZY CONDITIONS ARE POSSIBLE.

MEANWHILE ANOTHER LOW PRESSURE SYSTEM WILL NEAR THE TWO STATE AREA
AND INCREASE RAIN CHANCES AGAIN ON WEDNESDAY AND CONTINUE INTO
WEDNESDAY NIGHT.

LONG TERM...THURSDAY THROUGH MONDAY AFTERNOON...RAIN LIKELY FOR
DAYTIME PERIOD FOR THURSDAY BY VIRTUE OF A WARM FRONT AND A COLD
FRONT MOVING ACROSS FORECAST AREA AT A RAPID PACE. THURSDAY NIGHT A
MID/UPPER LEVEL LONG WAVE TROUGH PUSHES A COLD FRONT TO THE CASCADE
CRESTS AND THEN NUDGES THE FRONT INTO FORECAST AREA DURING THE DAY
ON FRIDAY. THE COLD FRONTAL BOUNDARY THEN MOVES SLOWLY ACROSS THE
FORECAST AREA FRIDAY. FRIDAY NIGHT THE COLD FRONT EASES INTO IDAHO
AND WESTERN MONTANA WHILE THE AFOREMENTIONED MID/UPPER TROUGH TAKES
ON A NEGATIVE TILT AS IT SWINGS INLAND OVER THE REGION. THE EASTERN
MOUNTAINS WILL BE ON THE EASTERN FLANK OF THE TROUGH FRIDAY NIGHT
THUS THE BLUE MOUNTAINS AND WALLOWA MOUNTAINS WILL HAVE OROGRAPHIC
SHOWERS THROUGH FRIDAY NIGHT. SATURDAY THE LONG WAVE TROUGH REMAINS
OVER THE REGION WITH AN UPSTREAM MID/UPPER LEVEL SHORT WAVE
APPROACHING THE WESTERN FLANK OF THE TROUGH. KEPT A CHANCE OF
SHOWERS OVER MOUNTAINS ON SATURDAY BY VIRTUE OF THE TROUGH REMAINING
OVER THE INTERIOR PACIFIC NORTHWEST. SATURDAY NIGHT THROUGH SUNDAY
THE UPSTREAM SHORT WAVE MOVES ACROSS THE FORECAST AREA WITH ANOTHER
MID/UPPER SHORT WAVE HOT ON ITS HEALS MOVING INTO FORECAST AREA
SUNDAY NIGHT FOR A CHANCE OF SHOWERS SATURDAY NIGHT THROUGH SUNDAY
NIGHT. MONDAY MODELS HINT AT A WEAK WEATHER SYSTEM MOVING INTO
REGION FOR A CHANCE OF SHOWERS, MAINLY IN THE MOUNTAINS.  POLAN

AVIATION...00Z TAFS...KBDN MAY SEE MVFR TONIGHT FROM 06Z TO 15Z/
22ND. OTHERWISE, VFR CONDITIONS ARE EXPECTED OVER THE NEXT 24 HOURS.
A COLD FRONT WILL SLOWLY APPROACH THE COAST THIS EVENING AND THEN
MOVE INLAND OVERNIGHT. THE FRONT WILL BEGIN MOVING EAST OF THE
CASCADE CRESTS TUESDAY MORNING AT SOME POINT AROUND DAYBREAK.
BKN-OVC CLOUDS WILL BE AT 9000-11000 FT AGL AT KRDM, KBDN AND KDLS,
THEN STEADILY LOWER TO 2000-5000 FEET AFTER 02Z/22ND. I AGAIN
DELAYED THE ONSET OF RAIN UNTIL 02Z-04Z AT KDLS, KYKM, KRDM AND KBDN
AND ALSO SLOWED DOWN THE ARRIVAL AT KPSC, KPDT AND KALW. WIND FLOW
ALOFT IS PARALLEL TO THE COLD FRONT AND THIS WILL DELAY THE ARRIVAL
OF RAIN ASSOCIATED WITH THE FRONT. RAIN, MODERATE AT TIMES, WILL
SPREAD EASTWARD AND ARRIVE AT KPSC, KPDT AND KALW BY 10Z-11Z/22ND
AND WILL CONTINUE THROUGH 18Z/22ND. WINDS WILL REMAIN BELOW 15 KTS
THOUGH A FEW HIGHER GUSTS TO 30 KTS WILL BE POSSIBLE LATE THIS
AFTERNOON INTO EARLY THIS EVENING AT KBDN, KRDM AND KDLS.  POLAN

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  44  56  39  56 /  60  80  30  30
ALW  47  57  42  56 /  60  80  40  30
PSC  48  61  44  60 /  60  70  20  20
YKM  44  57  36  58 /  70  60  20  20
HRI  47  59  41  59 /  60  80  20  30
ELN  41  55  36  57 /  70  70  20  20
RDM  39  49  30  55 /  70  80  30  30
LGD  42  49  36  52 /  50  80  40  40
GCD  40  46  30  48 /  50  80  40  40
DLS  47  57  42  59 /  80  80  30  40

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...NONE.
WA...NONE.
&&

THREAT INDEX
TUESDAY : GREEN
WEDNESDAY : GREEN
THURSDAY : GREEN

GREEN: NONE OR LIMITED NEED FOR WATCHES, WARNINGS, OR ADVISORIES.
YELLOW: A FEW WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.
RED: NUMEROUS WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

94







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