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000
FXUS66 KPDT 120622
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
1015 PM PST THU FEB 11 2016

.SHORT TERM...WARM FRONT MOVING ACROSS THE NORTHERN PORTION OF THE
FORECAST AREA THIS EVENING WITH SOME LIGHT RAIN. SHOULD EXIT THE
REGION BY LATE EVENING. SATELLITE INDICATES PARTLY TO MOSTLY
CLOUDY SKIES FOR THE REMAINDER OF THE NIGHT. UPPER LEVEL TROUGH
AND COLD FRONT MOVE THROUGH ON FRIDAY WITH ADDITIONAL RAIN AND
MOUNTAIN SNOW. NEXT SYSTEM LOOKS FAIRLY STRONG AND WILL BRING
DECENT PRECIPITATION SATURDAY NIGHT INTO SUNDAY NIGHT. RAINFALL
AMOUNTS COMBINED WITH WARM AIRMASS WILL RESULT IN SIGNIFICANT
RIVER RISES SUNDAY THROUGH TUESDAY. 94

.AVIATION...06Z TAFS. RAIN ENDING ACROSS THE REGION AS WARM FRONT
MOVES NORTHWARD. CLEARING SKIES EVIDENT ON SATELLITE COMBINED WITH
HIGH DEW POINTS. EXPECT INCREASING COVERAGE OF FOG AND LOW CLOUDS
TONIGHT INTO FRIDAY MORNING. EXPECT SOME IFR CONDITIONS TO DEVELOP.
COLD FRONT MOVING ACROSS THE AREA FRIDAY WILL BRING A CHANCE OF
RAIN. 94

&&

.PREV DISCUSSION... /ISSUED 353 PM PST THU FEB 11 2016/

SHORT TERM...TONIGHT THROUGH SATURDAY NIGHT...A WARM FRONT
ASSOCIATED WITH THE NEXT PACIFIC SYSTEM IS CURRENTLY MOVING NORTH
ACROSS THE PACIFIC NORTHWEST. THIS FRONT WILL CONTINUE TO MOVE
THROUGH NORTHEAST OREGON AND SOUTHEAST WASHINGTON LATE THIS
AFTERNOON AND EARLY THIS EVENING. THUS WILL SEE LIGHT SHOWERS
GRADUALLY LIFT NORTH OUT OF MUCH OF THE AREA BY MID EVENING. A FEW
SHOWERS SHOULD LINGER OVER THE NORTHERN BLUES, NEAR THE OREGON
CASCADES AND OVER PORTIONS OF SOUTHEAST WASHINGTON OVERNIGHT. LOW
LEVEL INVERSIONS WILL CONTINUE OVER PORTIONS OF THE BASIN, AND SOME
PATCHY FOG WILL AGAIN BE POSSIBLE OVERNIGHT INTO FRIDAY MORNING.
THUS WILL ALSO CONTINUE THE CURRENT AIR STAGNATION ADVISORIES. THE
COLD FRONT ASSOCIATED WITH THIS NEXT SYSTEM WILL MOVE ACROSS THE
REGION FRIDAY AFTERNOON AND EVENING. THIS SYSTEM WILL SPREAD MORE
PRECIP ACROSS THE AREA. WILL SEE SNOW LEVELS LOWER BEHIND THE FRONT.
ALSO SHOULD SEE WINDS OVER PORTIONS OF THE AREA INCREASE BEHIND THE
FRONT. A FEW SHOWERS WILL LINGER SATURDAY OVER THE MOUNTAINS.
MEANWHILE SHOULD SEE BREEZIER WINDS AND BETTER MIXING AT MOST
LOCATIONS, THOUGH MIXING MAY REMAIN LIMITED IN THE YAKIMA AND
KITTITAS VALLEYS. ANOTHER WARM FRONT IS EXPECTED TO MOVE ACROSS THE
REGION SATURDAY NIGHT BRINGING ANOTHER ROUND OF PRECIP. SNOW LEVELS
SATURDAY NIGHT WILL RUN AROUND 4000 FEET. 90

LONG TERM...SUNDAY THROUGH THURSDAY...A WEST TO NORTHWEST FLOW WILL
PROVIDE AMPLE MOISTURE AS A SERIES OF DISTURBANCES RIDE OVER AN
OFFSHORE RIDGE. THIS WILL LEAD TO A CHANCE FOR MAINLY RAIN SHOWERS
AT TIMES. SUNDAY WILL SEE A COLD FRONT CROSS THE AREA AS A RIDGE
BUILDS OFFSHORE. SNOW LEVELS WILL REMAIN AROUND 4000 FEET IN THE
MORNING THEN RISE TO 6000-7000 FEET IN THE AFTERNOON. THIS WILL GIVE
US A CHANCE OF RAIN ACROSS THE AREA AND THE MOUNTAINS WILL HAVE A
CHANCE OF OF UP TO AN INCH OR TWO OF SNOW IN THE MORNING. THE
STRENGTHENING OFFSHORE RIDGE WILL LIFT THE FRONT NORTH OUT OF THE
AREA SUNDAY NIGHT WITH A CONTINUED CHANCE OF RAIN IN THE MOUNTAINS
AND A SLIGHT CHANCE IN THE LOWER ELEVATIONS. MONDAY THROUGH TUESDAY
THE RIDGE WILL DEFLECT SYSTEMS TO OUR NORTH AND WE WILL BE DRY ASIDE
FROM A CHANCE OF SHOWERS ALONG THE CASCADE CREST AND A SLIGHT CHANCE
OF SHOWERS IN THE EASTERN MOUNTAINS. TUESDAY AND TUESDAY NIGHT AN
APPROACHING TROUGH WILL PUSH THE RIDGE ACROSS OUR AREA AND OFF TO
THE EAST. MODELS DIFFER AS TO WHEN A FRONT ASSOCIATED WITH THE
TROUGH WILL CROSS THE AREA. THE GFS BRINGS IT IN WEDNESDAY AND
WEDNESDAY NIGHT WITH THE TROUGH MOVING THROUGH BEHIND THE FRONT ON
THURSDAY. THE ECMWF HAS A STRONGER SYSTEM FURTHER SOUTH WITH IT
MOVING INTO THE AREA WEDNESDAY NIGHT AND THURSDAY. BOTH SITUATIONS
WOULD MEAN A CHANCE OF RAIN ACROSS THE AREA WITH SNOW LEVELS AROUND
6000-7000 FEET INITIALLY BEFORE DROPPING TO 3000-4000 FEET WITH THE
TROUGH PASSAGE. HAVE LEANED TOWARDS THE GFS TIMING AND HAVE A CHANCE
OF RAIN WEDNESDAY THROUGH THURSDAY WITH A CHANCE OF MOUNTAIN SNOW IN
ADDITION BY THURSDAY. TEMPERATURES SUNDAY WILL BE IN THE LOWER TO
MID 50S WITH MID 40S TO MID 50S IN THE MOUNTAINS. WITH THE INFLUENCE
OF THE OFFSHORE RIDGE TEMPERATURES WILL SOAR MONDAY AND TUESDAY TO
UPPER 50S TO MID 60S WITH UPPER 40S AND 50S IN THE MOUNTAINS. A FEW
PLACES MAY SEE RECORD HIGH TEMPERATURES ON THESE DAYS. WEDNESDAY AND
THURSDAY WILL DROP BACK THE 50S WITH MAINLY 40S IN THE MOUNTAINS.
PERRY

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  40  52  39  53 /  30  40  50  10
ALW  43  52  43  53 /  30  40  50  20
PSC  39  51  38  56 /  30  40  30  10
YKM  38  48  33  52 /  50  40  20  10
HRI  40  52  39  56 /  30  40  40  10
ELN  33  44  33  46 /  60  50  20  20
RDM  36  56  31  52 /  10  30  30  10
LGD  38  51  34  49 /  30  20  40  20
GCD  38  54  33  50 /  10  20  30  10
DLS  41  54  40  54 /  40  50  30  20

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR ORZ041-044-
     050-505-507-508-510.

WA...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR WAZ024-
     026>029-520-521.

&&

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

$$

94





000
FXUS66 KPDT 120344
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
744 PM PST THU FEB 11 2016

.SHORT TERM...WARM FRONT MOVING ACROSS THE NORTHERN PORTION OF THE
FORECAST AREA THIS EVENING WITH SOME LIGHT RAIN. SHOULD EXIT THE
REGION BY LATE EVENING. SATELLITE INDICATES PARTLY TO MOSTLY
CLOUDY SKIES FOR THE REMAINDER OF THE NIGHT. UPPER LEVEL TROUGH
AND COLD FRONT MOVE THROUGH ON FRIDAY WITH ADDITIONAL RAIN AND
MOUNTAIN SNOW. NEXT SYSTEM LOOKS FAIRLY STRONG AND WILL BRING
DECENT PRECIPITATION SATURDAY NIGHT INTO SUNDAY NIGHT. RAINFALL
AMOUNTS COMBINED WITH WARM AIRMASS WILL RESULT IN SIGNIFICANT
RIVER RISES SUNDAY THROUGH TUESDAY. 94

&&

.PREV DISCUSSION... /ISSUED 353 PM PST THU FEB 11 2016/

SHORT TERM...TONIGHT THROUGH SATURDAY NIGHT...A WARM FRONT
ASSOCIATED WITH THE NEXT PACIFIC SYSTEM IS CURRENTLY MOVING NORTH
ACROSS THE PACIFIC NORTHWEST. THIS FRONT WILL CONTINUE TO MOVE
THROUGH NORTHEAST OREGON AND SOUTHEAST WASHINGTON LATE THIS
AFTERNOON AND EARLY THIS EVENING. THUS WILL SEE LIGHT SHOWERS
GRADUALLY LIFT NORTH OUT OF MUCH OF THE AREA BY MID EVENING. A FEW
SHOWERS SHOULD LINGER OVER THE NORTHERN BLUES, NEAR THE OREGON
CASCADES AND OVER PORTIONS OF SOUTHEAST WASHINGTON OVERNIGHT. LOW
LEVEL INVERSIONS WILL CONTINUE OVER PORTIONS OF THE BASIN, AND SOME
PATCHY FOG WILL AGAIN BE POSSIBLE OVERNIGHT INTO FRIDAY MORNING.
THUS WILL ALSO CONTINUE THE CURRENT AIR STAGNATION ADVISORIES. THE
COLD FRONT ASSOCIATED WITH THIS NEXT SYSTEM WILL MOVE ACROSS THE
REGION FRIDAY AFTERNOON AND EVENING. THIS SYSTEM WILL SPREAD MORE
PRECIP ACROSS THE AREA. WILL SEE SNOW LEVELS LOWER BEHIND THE FRONT.
ALSO SHOULD SEE WINDS OVER PORTIONS OF THE AREA INCREASE BEHIND THE
FRONT. A FEW SHOWERS WILL LINGER SATURDAY OVER THE MOUNTAINS.
MEANWHILE SHOULD SEE BREEZIER WINDS AND BETTER MIXING AT MOST
LOCATIONS, THOUGH MIXING MAY REMAIN LIMITED IN THE YAKIMA AND
KITTITAS VALLEYS. ANOTHER WARM FRONT IS EXPECTED TO MOVE ACROSS THE
REGION SATURDAY NIGHT BRINGING ANOTHER ROUND OF PRECIP. SNOW LEVELS
SATURDAY NIGHT WILL RUN AROUND 4000 FEET. 90

LONG TERM...SUNDAY THROUGH THURSDAY...A WEST TO NORTHWEST FLOW WILL
PROVIDE AMPLE MOISTURE AS A SERIES OF DISTURBANCES RIDE OVER AN
OFFSHORE RIDGE. THIS WILL LEAD TO A CHANCE FOR MAINLY RAIN SHOWERS
AT TIMES. SUNDAY WILL SEE A COLD FRONT CROSS THE AREA AS A RIDGE
BUILDS OFFSHORE. SNOW LEVELS WILL REMAIN AROUND 4000 FEET IN THE
MORNING THEN RISE TO 6000-7000 FEET IN THE AFTERNOON. THIS WILL GIVE
US A CHANCE OF RAIN ACROSS THE AREA AND THE MOUNTAINS WILL HAVE A
CHANCE OF OF UP TO AN INCH OR TWO OF SNOW IN THE MORNING. THE
STRENGTHENING OFFSHORE RIDGE WILL LIFT THE FRONT NORTH OUT OF THE
AREA SUNDAY NIGHT WITH A CONTINUED CHANCE OF RAIN IN THE MOUNTAINS
AND A SLIGHT CHANCE IN THE LOWER ELEVATIONS. MONDAY THROUGH TUESDAY
THE RIDGE WILL DEFLECT SYSTEMS TO OUR NORTH AND WE WILL BE DRY ASIDE
FROM A CHANCE OF SHOWERS ALONG THE CASCADE CREST AND A SLIGHT CHANCE
OF SHOWERS IN THE EASTERN MOUNTAINS. TUESDAY AND TUESDAY NIGHT AN
APPROACHING TROUGH WILL PUSH THE RIDGE ACROSS OUR AREA AND OFF TO
THE EAST. MODELS DIFFER AS TO WHEN A FRONT ASSOCIATED WITH THE
TROUGH WILL CROSS THE AREA. THE GFS BRINGS IT IN WEDNESDAY AND
WEDNESDAY NIGHT WITH THE TROUGH MOVING THROUGH BEHIND THE FRONT ON
THURSDAY. THE ECMWF HAS A STRONGER SYSTEM FURTHER SOUTH WITH IT
MOVING INTO THE AREA WEDNESDAY NIGHT AND THURSDAY. BOTH SITUATIONS
WOULD MEAN A CHANCE OF RAIN ACROSS THE AREA WITH SNOW LEVELS AROUND
6000-7000 FEET INITIALLY BEFORE DROPPING TO 3000-4000 FEET WITH THE
TROUGH PASSAGE. HAVE LEANED TOWARDS THE GFS TIMING AND HAVE A CHANCE
OF RAIN WEDNESDAY THROUGH THURSDAY WITH A CHANCE OF MOUNTAIN SNOW IN
ADDITION BY THURSDAY. TEMPERATURES SUNDAY WILL BE IN THE LOWER TO
MID 50S WITH MID 40S TO MID 50S IN THE MOUNTAINS. WITH THE INFLUENCE
OF THE OFFSHORE RIDGE TEMPERATURES WILL SOAR MONDAY AND TUESDAY TO
UPPER 50S TO MID 60S WITH UPPER 40S AND 50S IN THE MOUNTAINS. A FEW
PLACES MAY SEE RECORD HIGH TEMPERATURES ON THESE DAYS. WEDNESDAY AND
THURSDAY WILL DROP BACK THE 50S WITH MAINLY 40S IN THE MOUNTAINS.
PERRY

AVIATION...00Z TAFS...VFR CONDITIONS WILL BE PREDOMINANT FOR THE
NEXT 24 HOURS. A WARM FRONT IS CROSSING THE AREA THIS EVENING AND
WILL BRING OCCASIONAL SHOWERS MAINLY TO THE NORTHERN HALF OF THE
AREA THROUGH 03Z-05Z AFFECTING ALL TAF SITES EXCEPT KRDM, KBDN AND
KPSC. ANOTHER DISTURBANCE WILL BRING MORE SHOWERS AFTER 15Z-18Z
TOMORROW MORNING AFFECTING ALL TAF SITES. CEILINGS WILL BE BKN-OVC
AT 4000-10000 FEET AGL IN GENERAL, THOUGH KYKM AND KDLS MAY GET MVFR
CEILINGS AND VISIBILITIES DUE TO FOG FROM 11Z-18Z. KDLS MAY ALSO GET
MVFR CEILINGS WITH -SHRA FROM 16Z-21Z. WINDS WILL REMAIN BELOW 15
KTS FOR THE NEXT 24 HOURS. PERRY

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  40  52  39  53 /  30  40  50  10
ALW  43  52  43  53 /  30  40  50  20
PSC  39  51  38  56 /  30  40  30  10
YKM  38  48  33  52 /  50  40  20  10
HRI  40  52  39  56 /  30  40  40  10
ELN  33  44  33  46 /  60  50  20  20
RDM  36  56  31  52 /  10  30  30  10
LGD  38  51  34  49 /  30  20  40  20
GCD  38  54  33  50 /  10  20  30  10
DLS  41  54  40  54 /  40  50  30  20

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR ORZ041-044-
     050-505-507-508-510.

WA...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR WAZ024-
     026>029-520-521.

&&

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

$$

94





000
FXUS66 KPDT 120344
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
744 PM PST THU FEB 11 2016

.SHORT TERM...WARM FRONT MOVING ACROSS THE NORTHERN PORTION OF THE
FORECAST AREA THIS EVENING WITH SOME LIGHT RAIN. SHOULD EXIT THE
REGION BY LATE EVENING. SATELLITE INDICATES PARTLY TO MOSTLY
CLOUDY SKIES FOR THE REMAINDER OF THE NIGHT. UPPER LEVEL TROUGH
AND COLD FRONT MOVE THROUGH ON FRIDAY WITH ADDITIONAL RAIN AND
MOUNTAIN SNOW. NEXT SYSTEM LOOKS FAIRLY STRONG AND WILL BRING
DECENT PRECIPITATION SATURDAY NIGHT INTO SUNDAY NIGHT. RAINFALL
AMOUNTS COMBINED WITH WARM AIRMASS WILL RESULT IN SIGNIFICANT
RIVER RISES SUNDAY THROUGH TUESDAY. 94

&&

.PREV DISCUSSION... /ISSUED 353 PM PST THU FEB 11 2016/

SHORT TERM...TONIGHT THROUGH SATURDAY NIGHT...A WARM FRONT
ASSOCIATED WITH THE NEXT PACIFIC SYSTEM IS CURRENTLY MOVING NORTH
ACROSS THE PACIFIC NORTHWEST. THIS FRONT WILL CONTINUE TO MOVE
THROUGH NORTHEAST OREGON AND SOUTHEAST WASHINGTON LATE THIS
AFTERNOON AND EARLY THIS EVENING. THUS WILL SEE LIGHT SHOWERS
GRADUALLY LIFT NORTH OUT OF MUCH OF THE AREA BY MID EVENING. A FEW
SHOWERS SHOULD LINGER OVER THE NORTHERN BLUES, NEAR THE OREGON
CASCADES AND OVER PORTIONS OF SOUTHEAST WASHINGTON OVERNIGHT. LOW
LEVEL INVERSIONS WILL CONTINUE OVER PORTIONS OF THE BASIN, AND SOME
PATCHY FOG WILL AGAIN BE POSSIBLE OVERNIGHT INTO FRIDAY MORNING.
THUS WILL ALSO CONTINUE THE CURRENT AIR STAGNATION ADVISORIES. THE
COLD FRONT ASSOCIATED WITH THIS NEXT SYSTEM WILL MOVE ACROSS THE
REGION FRIDAY AFTERNOON AND EVENING. THIS SYSTEM WILL SPREAD MORE
PRECIP ACROSS THE AREA. WILL SEE SNOW LEVELS LOWER BEHIND THE FRONT.
ALSO SHOULD SEE WINDS OVER PORTIONS OF THE AREA INCREASE BEHIND THE
FRONT. A FEW SHOWERS WILL LINGER SATURDAY OVER THE MOUNTAINS.
MEANWHILE SHOULD SEE BREEZIER WINDS AND BETTER MIXING AT MOST
LOCATIONS, THOUGH MIXING MAY REMAIN LIMITED IN THE YAKIMA AND
KITTITAS VALLEYS. ANOTHER WARM FRONT IS EXPECTED TO MOVE ACROSS THE
REGION SATURDAY NIGHT BRINGING ANOTHER ROUND OF PRECIP. SNOW LEVELS
SATURDAY NIGHT WILL RUN AROUND 4000 FEET. 90

LONG TERM...SUNDAY THROUGH THURSDAY...A WEST TO NORTHWEST FLOW WILL
PROVIDE AMPLE MOISTURE AS A SERIES OF DISTURBANCES RIDE OVER AN
OFFSHORE RIDGE. THIS WILL LEAD TO A CHANCE FOR MAINLY RAIN SHOWERS
AT TIMES. SUNDAY WILL SEE A COLD FRONT CROSS THE AREA AS A RIDGE
BUILDS OFFSHORE. SNOW LEVELS WILL REMAIN AROUND 4000 FEET IN THE
MORNING THEN RISE TO 6000-7000 FEET IN THE AFTERNOON. THIS WILL GIVE
US A CHANCE OF RAIN ACROSS THE AREA AND THE MOUNTAINS WILL HAVE A
CHANCE OF OF UP TO AN INCH OR TWO OF SNOW IN THE MORNING. THE
STRENGTHENING OFFSHORE RIDGE WILL LIFT THE FRONT NORTH OUT OF THE
AREA SUNDAY NIGHT WITH A CONTINUED CHANCE OF RAIN IN THE MOUNTAINS
AND A SLIGHT CHANCE IN THE LOWER ELEVATIONS. MONDAY THROUGH TUESDAY
THE RIDGE WILL DEFLECT SYSTEMS TO OUR NORTH AND WE WILL BE DRY ASIDE
FROM A CHANCE OF SHOWERS ALONG THE CASCADE CREST AND A SLIGHT CHANCE
OF SHOWERS IN THE EASTERN MOUNTAINS. TUESDAY AND TUESDAY NIGHT AN
APPROACHING TROUGH WILL PUSH THE RIDGE ACROSS OUR AREA AND OFF TO
THE EAST. MODELS DIFFER AS TO WHEN A FRONT ASSOCIATED WITH THE
TROUGH WILL CROSS THE AREA. THE GFS BRINGS IT IN WEDNESDAY AND
WEDNESDAY NIGHT WITH THE TROUGH MOVING THROUGH BEHIND THE FRONT ON
THURSDAY. THE ECMWF HAS A STRONGER SYSTEM FURTHER SOUTH WITH IT
MOVING INTO THE AREA WEDNESDAY NIGHT AND THURSDAY. BOTH SITUATIONS
WOULD MEAN A CHANCE OF RAIN ACROSS THE AREA WITH SNOW LEVELS AROUND
6000-7000 FEET INITIALLY BEFORE DROPPING TO 3000-4000 FEET WITH THE
TROUGH PASSAGE. HAVE LEANED TOWARDS THE GFS TIMING AND HAVE A CHANCE
OF RAIN WEDNESDAY THROUGH THURSDAY WITH A CHANCE OF MOUNTAIN SNOW IN
ADDITION BY THURSDAY. TEMPERATURES SUNDAY WILL BE IN THE LOWER TO
MID 50S WITH MID 40S TO MID 50S IN THE MOUNTAINS. WITH THE INFLUENCE
OF THE OFFSHORE RIDGE TEMPERATURES WILL SOAR MONDAY AND TUESDAY TO
UPPER 50S TO MID 60S WITH UPPER 40S AND 50S IN THE MOUNTAINS. A FEW
PLACES MAY SEE RECORD HIGH TEMPERATURES ON THESE DAYS. WEDNESDAY AND
THURSDAY WILL DROP BACK THE 50S WITH MAINLY 40S IN THE MOUNTAINS.
PERRY

AVIATION...00Z TAFS...VFR CONDITIONS WILL BE PREDOMINANT FOR THE
NEXT 24 HOURS. A WARM FRONT IS CROSSING THE AREA THIS EVENING AND
WILL BRING OCCASIONAL SHOWERS MAINLY TO THE NORTHERN HALF OF THE
AREA THROUGH 03Z-05Z AFFECTING ALL TAF SITES EXCEPT KRDM, KBDN AND
KPSC. ANOTHER DISTURBANCE WILL BRING MORE SHOWERS AFTER 15Z-18Z
TOMORROW MORNING AFFECTING ALL TAF SITES. CEILINGS WILL BE BKN-OVC
AT 4000-10000 FEET AGL IN GENERAL, THOUGH KYKM AND KDLS MAY GET MVFR
CEILINGS AND VISIBILITIES DUE TO FOG FROM 11Z-18Z. KDLS MAY ALSO GET
MVFR CEILINGS WITH -SHRA FROM 16Z-21Z. WINDS WILL REMAIN BELOW 15
KTS FOR THE NEXT 24 HOURS. PERRY

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  40  52  39  53 /  30  40  50  10
ALW  43  52  43  53 /  30  40  50  20
PSC  39  51  38  56 /  30  40  30  10
YKM  38  48  33  52 /  50  40  20  10
HRI  40  52  39  56 /  30  40  40  10
ELN  33  44  33  46 /  60  50  20  20
RDM  36  56  31  52 /  10  30  30  10
LGD  38  51  34  49 /  30  20  40  20
GCD  38  54  33  50 /  10  20  30  10
DLS  41  54  40  54 /  40  50  30  20

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR ORZ041-044-
     050-505-507-508-510.

WA...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR WAZ024-
     026>029-520-521.

&&

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

$$

94





000
FXUS66 KPDT 112353 AAA
AFDPDT

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE PENDLETON OR
353 PM PST THU FEB 11 2016

UPDATED AVIATION DISCUSSION

.SHORT TERM...TONIGHT THROUGH SATURDAY NIGHT...A WARM FRONT
ASSOCIATED WITH THE NEXT PACIFIC SYSTEM IS CURRENTLY MOVING NORTH
ACROSS THE PACIFIC NORTHWEST. THIS FRONT WILL CONTINUE TO MOVE
THROUGH NORTHEAST OREGON AND SOUTHEAST WASHINGTON LATE THIS
AFTERNOON AND EARLY THIS EVENING. THUS WILL SEE LIGHT SHOWERS
GRADUALLY LIFT NORTH OUT OF MUCH OF THE AREA BY MID EVENING. A FEW
SHOWERS SHOULD LINGER OVER THE NORTHERN BLUES, NEAR THE OREGON
CASCADES AND OVER PORTIONS OF SOUTHEAST WASHINGTON OVERNIGHT. LOW
LEVEL INVERSIONS WILL CONTINUE OVER PORTIONS OF THE BASIN, AND SOME
PATCHY FOG WILL AGAIN BE POSSIBLE OVERNIGHT INTO FRIDAY MORNING.
THUS WILL ALSO CONTINUE THE CURRENT AIR STAGNATION ADVISORIES. THE
COLD FRONT ASSOCIATED WITH THIS NEXT SYSTEM WILL MOVE ACROSS THE
REGION FRIDAY AFTERNOON AND EVENING. THIS SYSTEM WILL SPREAD MORE
PRECIP ACROSS THE AREA. WILL SEE SNOW LEVELS LOWER BEHIND THE FRONT.
ALSO SHOULD SEE WINDS OVER PORTIONS OF THE AREA INCREASE BEHIND THE
FRONT. A FEW SHOWERS WILL LINGER SATURDAY OVER THE MOUNTAINS.
MEANWHILE SHOULD SEE BREEZIER WINDS AND BETTER MIXING AT MOST
LOCATIONS, THOUGH MIXING MAY REMAIN LIMITED IN THE YAKIMA AND
KITTITAS VALLEYS. ANOTHER WARM FRONT IS EXPECTED TO MOVE ACROSS THE
REGION SATURDAY NIGHT BRINGING ANOTHER ROUND OF PRECIP. SNOW LEVELS
SATURDAY NIGHT WILL RUN AROUND 4000 FEET. 90

.LONG TERM...SUNDAY THROUGH THURSDAY...A WEST TO NORTHWEST FLOW WILL
PROVIDE AMPLE MOISTURE AS A SERIES OF DISTURBANCES RIDE OVER AN
OFFSHORE RIDGE. THIS WILL LEAD TO A CHANCE FOR MAINLY RAIN SHOWERS
AT TIMES. SUNDAY WILL SEE A COLD FRONT CROSS THE AREA AS A RIDGE
BUILDS OFFSHORE. SNOW LEVELS WILL REMAIN AROUND 4000 FEET IN THE
MORNING THEN RISE TO 6000-7000 FEET IN THE AFTERNOON. THIS WILL GIVE
US A CHANCE OF RAIN ACROSS THE AREA AND THE MOUNTAINS WILL HAVE A
CHANCE OF OF UP TO AN INCH OR TWO OF SNOW IN THE MORNING. THE
STRENGTHENING OFFSHORE RIDGE WILL LIFT THE FRONT NORTH OUT OF THE
AREA SUNDAY NIGHT WITH A CONTINUED CHANCE OF RAIN IN THE MOUNTAINS
AND A SLIGHT CHANCE IN THE LOWER ELEVATIONS. MONDAY THROUGH TUESDAY
THE RIDGE WILL DEFLECT SYSTEMS TO OUR NORTH AND WE WILL BE DRY ASIDE
FROM A CHANCE OF SHOWERS ALONG THE CASCADE CREST AND A SLIGHT CHANCE
OF SHOWERS IN THE EASTERN MOUNTAINS. TUESDAY AND TUESDAY NIGHT AN
APPROACHING TROUGH WILL PUSH THE RIDGE ACROSS OUR AREA AND OFF TO
THE EAST. MODELS DIFFER AS TO WHEN A FRONT ASSOCIATED WITH THE
TROUGH WILL CROSS THE AREA. THE GFS BRINGS IT IN WEDNESDAY AND
WEDNESDAY NIGHT WITH THE TROUGH MOVING THROUGH BEHIND THE FRONT ON
THURSDAY. THE ECMWF HAS A STRONGER SYSTEM FURTHER SOUTH WITH IT
MOVING INTO THE AREA WEDNESDAY NIGHT AND THURSDAY. BOTH SITUATIONS
WOULD MEAN A CHANCE OF RAIN ACROSS THE AREA WITH SNOW LEVELS AROUND
6000-7000 FEET INITIALLY BEFORE DROPPING TO 3000-4000 FEET WITH THE
TROUGH PASSAGE. HAVE LEANED TOWARDS THE GFS TIMING AND HAVE A CHANCE
OF RAIN WEDNESDAY THROUGH THURSDAY WITH A CHANCE OF MOUNTAIN SNOW IN
ADDITION BY THURSDAY. TEMPERATURES SUNDAY WILL BE IN THE LOWER TO
MID 50S WITH MID 40S TO MID 50S IN THE MOUNTAINS. WITH THE INFLUENCE
OF THE OFFSHORE RIDGE TEMPERATURES WILL SOAR MONDAY AND TUESDAY TO
UPPER 50S TO MID 60S WITH UPPER 40S AND 50S IN THE MOUNTAINS. A FEW
PLACES MAY SEE RECORD HIGH TEMPERATURES ON THESE DAYS. WEDNESDAY AND
THURSDAY WILL DROP BACK THE 50S WITH MAINLY 40S IN THE MOUNTAINS.
PERRY

&&

.AVIATION...00Z TAFS...VFR CONDITIONS WILL BE PREDOMINANT FOR THE
NEXT 24 HOURS. A WARM FRONT IS CROSSING THE AREA THIS EVENING AND
WILL BRING OCCASIONAL SHOWERS MAINLY TO THE NORTHERN HALF OF THE
AREA THROUGH 03Z-05Z AFFECTING ALL TAF SITES EXCEPT KRDM, KBDN AND
KPSC. ANOTHER DISTURBANCE WILL BRING MORE SHOWERS AFTER 15Z-18Z
TOMORROW MORNING AFFECTING ALL TAF SITES. CEILINGS WILL BE BKN-OVC
AT 4000-10000 FEET AGL IN GENERAL, THOUGH KYKM AND KDLS MAY GET MVFR
CEILINGS AND VISIBILITIES DUE TO FOG FROM 11Z-18Z. KDLS MAY ALSO GET
MVFR CEILINGS WITH -SHRA FROM 16Z-21Z. WINDS WILL REMAIN BELOW 15
KTS FOR THE NEXT 24 HOURS. PERRY

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  40  53  39  53 /  20  30  50  10
ALW  43  53  43  53 /  20  40  50  20
PSC  39  52  38  56 /  20  40  30  10
YKM  38  49  33  52 /  40  30  20  10
HRI  40  53  39  56 /  20  40  40  10
ELN  33  45  33  46 /  50  40  20  20
RDM  36  57  31  52 /  10  30  30  10
LGD  38  52  34  49 /  20  20  40  20
GCD  38  55  33  50 /  10  10  30  10
DLS  41  55  40  54 /  30  40  30  20

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR ORZ041-044-
     050-505-507-508-510.

WA...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR WAZ024-
     026>029-520-521.

&&

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

$$

90/83/83





000
FXUS66 KPDT 112246
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
245 PM PST THU FEB 11 2016

.SHORT TERM...TONIGHT THROUGH SATURDAY NIGHT...A WARM FRONT
ASSOCIATED WITH THE NEXT PACIFIC SYSTEM IS CURRENTLY MOVING NORTH
ACROSS THE PACIFIC NORTHWEST. THIS FRONT WILL CONTINUE TO MOVE
THROUGH NORTHEAST OREGON AND SOUTHEAST WASHINGTON LATE THIS
AFTERNOON AND EARLY THIS EVENING. THUS WILL SEE LIGHT SHOWERS
GRADUALLY LIFT NORTH OUT OF MUCH OF THE AREA BY MID EVENING. A FEW
SHOWERS SHOULD LINGER OVER THE NORTHERN BLUES, NEAR THE OREGON
CASCADES AND OVER PORTIONS OF SOUTHEAST WASHINGTON OVERNIGHT. LOW
LEVEL INVERSIONS WILL CONTINUE OVER PORTIONS OF THE BASIN, AND SOME
PATCHY FOG WILL AGAIN BE POSSIBLE OVERNIGHT INTO FRIDAY MORNING.
THUS WILL ALSO CONTINUE THE CURRENT AIR STAGNATION ADVISORIES. THE
COLD FRONT ASSOCIATED WITH THIS NEXT SYSTEM WILL MOVE ACROSS THE
REGION FRIDAY AFTERNOON AND EVENING. THIS SYSTEM WILL SPREAD MORE
PRECIP ACROSS THE AREA. WILL SEE SNOW LEVELS LOWER BEHIND THE FRONT.
ALSO SHOULD SEE WINDS OVER PORTIONS OF THE AREA INCREASE BEHIND THE
FRONT. A FEW SHOWERS WILL LINGER SATURDAY OVER THE MOUNTAINS.
MEANWHILE SHOULD SEE BREEZIER WINDS AND BETTER MIXING AT MOST
LOCATIONS, THOUGH MIXING MAY REMAIN LIMITED IN THE YAKIMA AND
KITTITAS VALLEYS. ANOTHER WARM FRONT IS EXPECTED TO MOVE ACROSS THE
REGION SATURDAY NIGHT BRINGING ANOTHER ROUND OF PRECIP. SNOW LEVELS
SATURDAY NIGHT WILL RUN AROUND 4000 FEET. 90

.LONG TERM...SUNDAY THROUGH THURSDAY...A WEST TO NORTHWEST FLOW WILL
PROVIDE AMPLE MOISTURE AS A SERIES OF DISTURBANCES RIDE OVER AN
OFFSHORE RIDGE. THIS WILL LEAD TO A CHANCE FOR MAINLY RAIN SHOWERS
AT TIMES. SUNDAY WILL SEE A COLD FRONT CROSS THE AREA AS A RIDGE
BUILDS OFFSHORE. SNOW LEVELS WILL REMAIN AROUND 4000 FEET IN THE
MORNING THEN RISE TO 6000-7000 FEET IN THE AFTERNOON. THIS WILL GIVE
US A CHANCE OF RAIN ACROSS THE AREA AND THE MOUNTAINS WILL HAVE A
CHANCE OF OF UP TO AN INCH OR TWO OF SNOW IN THE MORNING. THE
STRENGTHENING OFFSHORE RIDGE WILL LIFT THE FRONT NORTH OUT OF THE
AREA SUNDAY NIGHT WITH A CONTINUED CHANCE OF RAIN IN THE MOUNTAINS
AND A SLIGHT CHANCE IN THE LOWER ELEVATIONS. MONDAY THROUGH TUESDAY
THE RIDGE WILL DEFLECT SYSTEMS TO OUR NORTH AND WE WILL BE DRY ASIDE
FROM A CHANCE OF SHOWERS ALONG THE CASCADE CREST AND A SLIGHT CHANCE
OF SHOWERS IN THE EASTERN MOUNTAINS. TUESDAY AND TUESDAY NIGHT AN
APPROACHING TROUGH WILL PUSH THE RIDGE ACROSS OUR AREA AND OFF TO
THE EAST. MODELS DIFFER AS TO WHEN A FRONT ASSOCIATED WITH THE
TROUGH WILL CROSS THE AREA. THE GFS BRINGS IT IN WEDNESDAY AND
WEDNESDAY NIGHT WITH THE TROUGH MOVING THROUGH BEHIND THE FRONT ON
THURSDAY. THE ECMWF HAS A STRONGER SYSTEM FURTHER SOUTH WITH IT
MOVING INTO THE AREA WEDNESDAY NIGHT AND THURSDAY. BOTH SITUATIONS
WOULD MEAN A CHANCE OF RAIN ACROSS THE AREA WITH SNOW LEVELS AROUND
6000-7000 FEET INITIALLY BEFORE DROPPING TO 3000-4000 FEET WITH THE
TROUGH PASSAGE. HAVE LEANED TOWARDS THE GFS TIMING AND HAVE A CHANCE
OF RAIN WEDNESDAY THROUGH THURSDAY WITH A CHANCE OF MOUNTAIN SNOW IN
ADDITION BY THURSDAY. TEMPERATURES SUNDAY WILL BE IN THE LOWER TO
MID 50S WITH MID 40S TO MID 50S IN THE MOUNTAINS. WITH THE INFLUENCE
OF THE OFFSHORE RIDGE TEMPERATURES WILL SOAR MONDAY AND TUESDAY TO
UPPER 50S TO MID 60S WITH UPPER 40S AND 50S IN THE MOUNTAINS. A FEW
PLACES MAY SEE RECORD HIGH TEMPERATURES ON THESE DAYS. WEDNESDAY AND
THURSDAY WILL DROP BACK THE 50S WITH MAINLY 40S IN THE MOUNTAINS.
PERRY

&&

.AVIATION...PREVIOUS DISCUSSION...18Z TAFS...WEAK DISTURBANCES WILL
BE CROSSING THE AREA FOR THE NEXT 24 HOURS WITH OCCASIONAL PERIODS
OF SHOWERS ACROSS THE AREA. CHANCES WILL BE HIGHER NEAR THE CASCADES
AND IN THE WASHINGTON PORTION OF THE AREA. VFR CONDITIONS WILL
PREDOMINATE THOUGH MVFR CEILINGS AND VISIBILITIES WILL BE POSSIBLE
WITH THE HEAVIER SHOWERS. HAVE -SHRA AT TIMES AT ALL TAF SITES
EXCEPT KPSC, KALW AND KPDT WHERE VCSH WAS USED. IN GENERAL, -SHRA
WILL INCREASE THIS AFTERNOON, DECREASE TONIGHT AND BEGIN TO INCREASE
AGAIN AFTER 15Z TOMORROW MORNING. MODELS HINT AT SOME BR TOMORROW
MORNING IN A FEW PLACES SO HAVE 4-6SM TOMORROW MORNING AT KDLS, KYKM
AND KALW. WINDS WILL REMAIN BELOW 15 KTS FOR THE NEXT 24 HOURS. PERRY

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  40  53  39  53 /  20  30  50  10
ALW  43  53  43  53 /  20  40  50  20
PSC  39  52  38  56 /  20  40  30  10
YKM  38  49  33  52 /  40  30  20  10
HRI  40  53  39  56 /  20  40  40  10
ELN  33  45  33  46 /  50  40  20  20
RDM  36  57  31  52 /  10  30  30  10
LGD  38  52  34  49 /  20  20  40  20
GCD  38  55  33  50 /  10  10  30  10
DLS  41  55  40  54 /  30  40  30  20

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR ORZ041-044-
     050-505-507-508-510.

WA...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR WAZ024-
     026>029-520-521.

&&

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

$$

90/83/83




000
FXUS66 KPDT 112246
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
245 PM PST THU FEB 11 2016

.SHORT TERM...TONIGHT THROUGH SATURDAY NIGHT...A WARM FRONT
ASSOCIATED WITH THE NEXT PACIFIC SYSTEM IS CURRENTLY MOVING NORTH
ACROSS THE PACIFIC NORTHWEST. THIS FRONT WILL CONTINUE TO MOVE
THROUGH NORTHEAST OREGON AND SOUTHEAST WASHINGTON LATE THIS
AFTERNOON AND EARLY THIS EVENING. THUS WILL SEE LIGHT SHOWERS
GRADUALLY LIFT NORTH OUT OF MUCH OF THE AREA BY MID EVENING. A FEW
SHOWERS SHOULD LINGER OVER THE NORTHERN BLUES, NEAR THE OREGON
CASCADES AND OVER PORTIONS OF SOUTHEAST WASHINGTON OVERNIGHT. LOW
LEVEL INVERSIONS WILL CONTINUE OVER PORTIONS OF THE BASIN, AND SOME
PATCHY FOG WILL AGAIN BE POSSIBLE OVERNIGHT INTO FRIDAY MORNING.
THUS WILL ALSO CONTINUE THE CURRENT AIR STAGNATION ADVISORIES. THE
COLD FRONT ASSOCIATED WITH THIS NEXT SYSTEM WILL MOVE ACROSS THE
REGION FRIDAY AFTERNOON AND EVENING. THIS SYSTEM WILL SPREAD MORE
PRECIP ACROSS THE AREA. WILL SEE SNOW LEVELS LOWER BEHIND THE FRONT.
ALSO SHOULD SEE WINDS OVER PORTIONS OF THE AREA INCREASE BEHIND THE
FRONT. A FEW SHOWERS WILL LINGER SATURDAY OVER THE MOUNTAINS.
MEANWHILE SHOULD SEE BREEZIER WINDS AND BETTER MIXING AT MOST
LOCATIONS, THOUGH MIXING MAY REMAIN LIMITED IN THE YAKIMA AND
KITTITAS VALLEYS. ANOTHER WARM FRONT IS EXPECTED TO MOVE ACROSS THE
REGION SATURDAY NIGHT BRINGING ANOTHER ROUND OF PRECIP. SNOW LEVELS
SATURDAY NIGHT WILL RUN AROUND 4000 FEET. 90

.LONG TERM...SUNDAY THROUGH THURSDAY...A WEST TO NORTHWEST FLOW WILL
PROVIDE AMPLE MOISTURE AS A SERIES OF DISTURBANCES RIDE OVER AN
OFFSHORE RIDGE. THIS WILL LEAD TO A CHANCE FOR MAINLY RAIN SHOWERS
AT TIMES. SUNDAY WILL SEE A COLD FRONT CROSS THE AREA AS A RIDGE
BUILDS OFFSHORE. SNOW LEVELS WILL REMAIN AROUND 4000 FEET IN THE
MORNING THEN RISE TO 6000-7000 FEET IN THE AFTERNOON. THIS WILL GIVE
US A CHANCE OF RAIN ACROSS THE AREA AND THE MOUNTAINS WILL HAVE A
CHANCE OF OF UP TO AN INCH OR TWO OF SNOW IN THE MORNING. THE
STRENGTHENING OFFSHORE RIDGE WILL LIFT THE FRONT NORTH OUT OF THE
AREA SUNDAY NIGHT WITH A CONTINUED CHANCE OF RAIN IN THE MOUNTAINS
AND A SLIGHT CHANCE IN THE LOWER ELEVATIONS. MONDAY THROUGH TUESDAY
THE RIDGE WILL DEFLECT SYSTEMS TO OUR NORTH AND WE WILL BE DRY ASIDE
FROM A CHANCE OF SHOWERS ALONG THE CASCADE CREST AND A SLIGHT CHANCE
OF SHOWERS IN THE EASTERN MOUNTAINS. TUESDAY AND TUESDAY NIGHT AN
APPROACHING TROUGH WILL PUSH THE RIDGE ACROSS OUR AREA AND OFF TO
THE EAST. MODELS DIFFER AS TO WHEN A FRONT ASSOCIATED WITH THE
TROUGH WILL CROSS THE AREA. THE GFS BRINGS IT IN WEDNESDAY AND
WEDNESDAY NIGHT WITH THE TROUGH MOVING THROUGH BEHIND THE FRONT ON
THURSDAY. THE ECMWF HAS A STRONGER SYSTEM FURTHER SOUTH WITH IT
MOVING INTO THE AREA WEDNESDAY NIGHT AND THURSDAY. BOTH SITUATIONS
WOULD MEAN A CHANCE OF RAIN ACROSS THE AREA WITH SNOW LEVELS AROUND
6000-7000 FEET INITIALLY BEFORE DROPPING TO 3000-4000 FEET WITH THE
TROUGH PASSAGE. HAVE LEANED TOWARDS THE GFS TIMING AND HAVE A CHANCE
OF RAIN WEDNESDAY THROUGH THURSDAY WITH A CHANCE OF MOUNTAIN SNOW IN
ADDITION BY THURSDAY. TEMPERATURES SUNDAY WILL BE IN THE LOWER TO
MID 50S WITH MID 40S TO MID 50S IN THE MOUNTAINS. WITH THE INFLUENCE
OF THE OFFSHORE RIDGE TEMPERATURES WILL SOAR MONDAY AND TUESDAY TO
UPPER 50S TO MID 60S WITH UPPER 40S AND 50S IN THE MOUNTAINS. A FEW
PLACES MAY SEE RECORD HIGH TEMPERATURES ON THESE DAYS. WEDNESDAY AND
THURSDAY WILL DROP BACK THE 50S WITH MAINLY 40S IN THE MOUNTAINS.
PERRY

&&

.AVIATION...PREVIOUS DISCUSSION...18Z TAFS...WEAK DISTURBANCES WILL
BE CROSSING THE AREA FOR THE NEXT 24 HOURS WITH OCCASIONAL PERIODS
OF SHOWERS ACROSS THE AREA. CHANCES WILL BE HIGHER NEAR THE CASCADES
AND IN THE WASHINGTON PORTION OF THE AREA. VFR CONDITIONS WILL
PREDOMINATE THOUGH MVFR CEILINGS AND VISIBILITIES WILL BE POSSIBLE
WITH THE HEAVIER SHOWERS. HAVE -SHRA AT TIMES AT ALL TAF SITES
EXCEPT KPSC, KALW AND KPDT WHERE VCSH WAS USED. IN GENERAL, -SHRA
WILL INCREASE THIS AFTERNOON, DECREASE TONIGHT AND BEGIN TO INCREASE
AGAIN AFTER 15Z TOMORROW MORNING. MODELS HINT AT SOME BR TOMORROW
MORNING IN A FEW PLACES SO HAVE 4-6SM TOMORROW MORNING AT KDLS, KYKM
AND KALW. WINDS WILL REMAIN BELOW 15 KTS FOR THE NEXT 24 HOURS. PERRY

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  40  53  39  53 /  20  30  50  10
ALW  43  53  43  53 /  20  40  50  20
PSC  39  52  38  56 /  20  40  30  10
YKM  38  49  33  52 /  40  30  20  10
HRI  40  53  39  56 /  20  40  40  10
ELN  33  45  33  46 /  50  40  20  20
RDM  36  57  31  52 /  10  30  30  10
LGD  38  52  34  49 /  20  20  40  20
GCD  38  55  33  50 /  10  10  30  10
DLS  41  55  40  54 /  30  40  30  20

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR ORZ041-044-
     050-505-507-508-510.

WA...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR WAZ024-
     026>029-520-521.

&&

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

$$

90/83/83





000
FXUS66 KPDT 112246
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
245 PM PST THU FEB 11 2016

.SHORT TERM...TONIGHT THROUGH SATURDAY NIGHT...A WARM FRONT
ASSOCIATED WITH THE NEXT PACIFIC SYSTEM IS CURRENTLY MOVING NORTH
ACROSS THE PACIFIC NORTHWEST. THIS FRONT WILL CONTINUE TO MOVE
THROUGH NORTHEAST OREGON AND SOUTHEAST WASHINGTON LATE THIS
AFTERNOON AND EARLY THIS EVENING. THUS WILL SEE LIGHT SHOWERS
GRADUALLY LIFT NORTH OUT OF MUCH OF THE AREA BY MID EVENING. A FEW
SHOWERS SHOULD LINGER OVER THE NORTHERN BLUES, NEAR THE OREGON
CASCADES AND OVER PORTIONS OF SOUTHEAST WASHINGTON OVERNIGHT. LOW
LEVEL INVERSIONS WILL CONTINUE OVER PORTIONS OF THE BASIN, AND SOME
PATCHY FOG WILL AGAIN BE POSSIBLE OVERNIGHT INTO FRIDAY MORNING.
THUS WILL ALSO CONTINUE THE CURRENT AIR STAGNATION ADVISORIES. THE
COLD FRONT ASSOCIATED WITH THIS NEXT SYSTEM WILL MOVE ACROSS THE
REGION FRIDAY AFTERNOON AND EVENING. THIS SYSTEM WILL SPREAD MORE
PRECIP ACROSS THE AREA. WILL SEE SNOW LEVELS LOWER BEHIND THE FRONT.
ALSO SHOULD SEE WINDS OVER PORTIONS OF THE AREA INCREASE BEHIND THE
FRONT. A FEW SHOWERS WILL LINGER SATURDAY OVER THE MOUNTAINS.
MEANWHILE SHOULD SEE BREEZIER WINDS AND BETTER MIXING AT MOST
LOCATIONS, THOUGH MIXING MAY REMAIN LIMITED IN THE YAKIMA AND
KITTITAS VALLEYS. ANOTHER WARM FRONT IS EXPECTED TO MOVE ACROSS THE
REGION SATURDAY NIGHT BRINGING ANOTHER ROUND OF PRECIP. SNOW LEVELS
SATURDAY NIGHT WILL RUN AROUND 4000 FEET. 90

.LONG TERM...SUNDAY THROUGH THURSDAY...A WEST TO NORTHWEST FLOW WILL
PROVIDE AMPLE MOISTURE AS A SERIES OF DISTURBANCES RIDE OVER AN
OFFSHORE RIDGE. THIS WILL LEAD TO A CHANCE FOR MAINLY RAIN SHOWERS
AT TIMES. SUNDAY WILL SEE A COLD FRONT CROSS THE AREA AS A RIDGE
BUILDS OFFSHORE. SNOW LEVELS WILL REMAIN AROUND 4000 FEET IN THE
MORNING THEN RISE TO 6000-7000 FEET IN THE AFTERNOON. THIS WILL GIVE
US A CHANCE OF RAIN ACROSS THE AREA AND THE MOUNTAINS WILL HAVE A
CHANCE OF OF UP TO AN INCH OR TWO OF SNOW IN THE MORNING. THE
STRENGTHENING OFFSHORE RIDGE WILL LIFT THE FRONT NORTH OUT OF THE
AREA SUNDAY NIGHT WITH A CONTINUED CHANCE OF RAIN IN THE MOUNTAINS
AND A SLIGHT CHANCE IN THE LOWER ELEVATIONS. MONDAY THROUGH TUESDAY
THE RIDGE WILL DEFLECT SYSTEMS TO OUR NORTH AND WE WILL BE DRY ASIDE
FROM A CHANCE OF SHOWERS ALONG THE CASCADE CREST AND A SLIGHT CHANCE
OF SHOWERS IN THE EASTERN MOUNTAINS. TUESDAY AND TUESDAY NIGHT AN
APPROACHING TROUGH WILL PUSH THE RIDGE ACROSS OUR AREA AND OFF TO
THE EAST. MODELS DIFFER AS TO WHEN A FRONT ASSOCIATED WITH THE
TROUGH WILL CROSS THE AREA. THE GFS BRINGS IT IN WEDNESDAY AND
WEDNESDAY NIGHT WITH THE TROUGH MOVING THROUGH BEHIND THE FRONT ON
THURSDAY. THE ECMWF HAS A STRONGER SYSTEM FURTHER SOUTH WITH IT
MOVING INTO THE AREA WEDNESDAY NIGHT AND THURSDAY. BOTH SITUATIONS
WOULD MEAN A CHANCE OF RAIN ACROSS THE AREA WITH SNOW LEVELS AROUND
6000-7000 FEET INITIALLY BEFORE DROPPING TO 3000-4000 FEET WITH THE
TROUGH PASSAGE. HAVE LEANED TOWARDS THE GFS TIMING AND HAVE A CHANCE
OF RAIN WEDNESDAY THROUGH THURSDAY WITH A CHANCE OF MOUNTAIN SNOW IN
ADDITION BY THURSDAY. TEMPERATURES SUNDAY WILL BE IN THE LOWER TO
MID 50S WITH MID 40S TO MID 50S IN THE MOUNTAINS. WITH THE INFLUENCE
OF THE OFFSHORE RIDGE TEMPERATURES WILL SOAR MONDAY AND TUESDAY TO
UPPER 50S TO MID 60S WITH UPPER 40S AND 50S IN THE MOUNTAINS. A FEW
PLACES MAY SEE RECORD HIGH TEMPERATURES ON THESE DAYS. WEDNESDAY AND
THURSDAY WILL DROP BACK THE 50S WITH MAINLY 40S IN THE MOUNTAINS.
PERRY

&&

.AVIATION...PREVIOUS DISCUSSION...18Z TAFS...WEAK DISTURBANCES WILL
BE CROSSING THE AREA FOR THE NEXT 24 HOURS WITH OCCASIONAL PERIODS
OF SHOWERS ACROSS THE AREA. CHANCES WILL BE HIGHER NEAR THE CASCADES
AND IN THE WASHINGTON PORTION OF THE AREA. VFR CONDITIONS WILL
PREDOMINATE THOUGH MVFR CEILINGS AND VISIBILITIES WILL BE POSSIBLE
WITH THE HEAVIER SHOWERS. HAVE -SHRA AT TIMES AT ALL TAF SITES
EXCEPT KPSC, KALW AND KPDT WHERE VCSH WAS USED. IN GENERAL, -SHRA
WILL INCREASE THIS AFTERNOON, DECREASE TONIGHT AND BEGIN TO INCREASE
AGAIN AFTER 15Z TOMORROW MORNING. MODELS HINT AT SOME BR TOMORROW
MORNING IN A FEW PLACES SO HAVE 4-6SM TOMORROW MORNING AT KDLS, KYKM
AND KALW. WINDS WILL REMAIN BELOW 15 KTS FOR THE NEXT 24 HOURS. PERRY

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  40  53  39  53 /  20  30  50  10
ALW  43  53  43  53 /  20  40  50  20
PSC  39  52  38  56 /  20  40  30  10
YKM  38  49  33  52 /  40  30  20  10
HRI  40  53  39  56 /  20  40  40  10
ELN  33  45  33  46 /  50  40  20  20
RDM  36  57  31  52 /  10  30  30  10
LGD  38  52  34  49 /  20  20  40  20
GCD  38  55  33  50 /  10  10  30  10
DLS  41  55  40  54 /  30  40  30  20

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR ORZ041-044-
     050-505-507-508-510.

WA...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR WAZ024-
     026>029-520-521.

&&

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

$$

90/83/83





000
FXUS66 KPDT 111755 AAA
AFDPDT

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE PENDLETON OR
955 AM PST THU FEB 11 2016

UPDATED AVIATION DISCUSSION

.SHORT TERM...MORNING UPDATE...AN UPPER RIDGE REMAINS OVER THE
WESTERN U.S. AND HAS STRENGTHENED OVER THE PACIFIC NORTHWEST. THE
FLOW OVER THE TOP OF THE RIDGE (AND ACROSS THE PACNW) REMAINS MOIST
WITH EMBEDDED WEAK DISTURBANCES. THUS CAN EXPECT VARYING COVERAGES
OF SHOWERS OVER THE AREA TODAY INTO TONIGHT. AS SUCH DID INCREASE
POPS SLIGHTLY ACROSS THE AREA FOR TODAY. LOW LEVEL INVERSIONS REMAIN
OVER PORTIONS OF THE AREA THIS MORNING, THOUGH THEY ARE WEAKER THAN
EARLIER THIS WEEK. A FEW LOCATIONS WERE SEEING VISIBILITIES OF 2-5
MILES IN FOG, THUS ADDED A MENTION OF FOG TO PORTIONS OF THE BASIN
FOR THE MORNING. THESE INVERSIONS WILL LAST AT LEAST INTO FRIDAY IF
NOT INTO SATURDAY MORNING. SOME AREAS, MAINLY IN OREGON, MAY MIX OUT
FRIDAY AFTERNOON AFTER AN EXPECTED COLD FRONTAL PASSAGE. 90

.LONG TERM...PREVIOUS DISCUSSION...A MOIST WEST/NORTHWEST FLOW WILL
CONTINUE THROUGH MUCH OF THE EXTENDED...WITH A COLD FRONT EXPECTED
NEXT WEDNESDAY EVENING. ON AND OFF BREEZY CONDITIONS CAN BE EXPECTED
ACROSS THE LOWER ELEVATIONS...AS 850MB JETS WILL RANGE FROM 30-
45KTS. RIGHT NOW THE BEST CHANCES OF PRECIPITATION LOOK TO BE
SATURDAY NIGHT THROUGH MONDAY NIGHT. WITH MODELS INDICATING 48HR
PRECIP TOTALS OF OVER 1.25" ACROSS THE NORTHERN BLUE MOUNTAINS...AND
OVER 2" FOR THE EAGLE CAPS AND THE WASHINGTON CASCADE CREST.

BY MONDAY NIGHT THERE WILL STILL BE CHANCES OF PRECIPITATION...BUT
MODELS ARE IN SLIGHT DISAGREEMENT AS TO HOW MUCH. THIS IS DUE TO
HIGH PRESSURE ATTEMPTING TO PUSH NORTH...ALLOWING FOR DRIER AIR TO
INTRUDE. SOME MODELS SUGGEST THAT ALMOST ALL AREAS WILL BE DRY WITH
7000+ FT MSL SNOW LEVELS FROM MONDAY NIGHT THROUGH WEDNESDAY. HAVE
TRIED TO MEET THE MODELS IN THE MIDDLE WITH POPS FOR THIS TIME
PERIOD.

NEXT COLD FRONT IS EXPECTED TO MOVE IN WEDNESDAY EVENING...WITH
SHOWERS AHEAD OF THIS FRONTAL SYSTEM ON WEDNESDAY DURING THE DAY.
RIGHT NOW WILL ONLY LOWER SNOW LEVELS DOWN TO ABOUT 4000 FT MSL ON
WEDNESDAY NIGHT INTO THURSDAY MORNING...AS THE COLDEST AIR WILL BE
IN ON THURSDAY AFTERNOON. ALTHOUGH THE CURRENT FORECAST DISCUSSION
WILL ONLY GO OUT THROUGH THURSDAY...IT APPEARS THIS WILL BE ANOTHER
FAST MOVING COLD FRONT WITH WARM AIR RETURNING NEXT WEEKEND.

&&

.AVIATION...18Z TAFS...WEAK DISTURBANCES WILL BE CROSSING THE AREA
FOR THE NEXT 24 HOURS WITH OCCASIONAL PERIODS OF SHOWERS ACROSS THE
AREA. CHANCES WILL BE HIGHER NEAR THE CASCADES AND IN THE WASHINGTON
PORTION OF THE AREA. VFR CONDITIONS WILL PREDOMINATE THOUGH MVFR
CEILINGS AND VISIBILITIES WILL BE POSSIBLE WITH THE HEAVIER SHOWERS.
HAVE -SHRA AT TIMES AT ALL TAF SITES EXCEPT KPSC, KALW AND KPDT
WHERE VCSH WAS USED. IN GENERAL, -SHRA WILL INCREASE THIS AFTERNOON,
DECREASE TONIGHT AND BEGIN TO INCREASE AGAIN AFTER 15Z TOMORROW
MORNING. MODELS HINT AT SOME BR TOMORROW MORNING IN A FEW PLACES SO
HAVE 4-6SM TOMORROW MORNING AT KDLS, KYKM AND KALW. WINDS WILL
REMAIN BELOW 15 KTS FOR THE NEXT 24 HOURS. PERRY

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  51  40  52  39 /  20  20  40  50
ALW  48  43  53  42 /  20  20  40  50
PSC  50  37  52  36 /  20  20  40  30
YKM  48  37  49  36 /  30  40  30  30
HRI  52  39  53  38 /  20  20  40  40
ELN  41  32  45  31 /  40  50  40  30
RDM  57  37  57  36 /  30  20  30  30
LGD  48  38  51  37 /  10  20  20  40
GCD  54  36  55  35 /  20  20  10  40
DLS  53  41  54  40 /  30  30  40  30

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR ORZ041-044-
     050-505-507-508-510.

WA...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR WAZ024-
     026>029-520-521.

&&

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

$$

90/89/83




000
FXUS66 KPDT 111755 AAA
AFDPDT

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE PENDLETON OR
955 AM PST THU FEB 11 2016

UPDATED AVIATION DISCUSSION

.SHORT TERM...MORNING UPDATE...AN UPPER RIDGE REMAINS OVER THE
WESTERN U.S. AND HAS STRENGTHENED OVER THE PACIFIC NORTHWEST. THE
FLOW OVER THE TOP OF THE RIDGE (AND ACROSS THE PACNW) REMAINS MOIST
WITH EMBEDDED WEAK DISTURBANCES. THUS CAN EXPECT VARYING COVERAGES
OF SHOWERS OVER THE AREA TODAY INTO TONIGHT. AS SUCH DID INCREASE
POPS SLIGHTLY ACROSS THE AREA FOR TODAY. LOW LEVEL INVERSIONS REMAIN
OVER PORTIONS OF THE AREA THIS MORNING, THOUGH THEY ARE WEAKER THAN
EARLIER THIS WEEK. A FEW LOCATIONS WERE SEEING VISIBILITIES OF 2-5
MILES IN FOG, THUS ADDED A MENTION OF FOG TO PORTIONS OF THE BASIN
FOR THE MORNING. THESE INVERSIONS WILL LAST AT LEAST INTO FRIDAY IF
NOT INTO SATURDAY MORNING. SOME AREAS, MAINLY IN OREGON, MAY MIX OUT
FRIDAY AFTERNOON AFTER AN EXPECTED COLD FRONTAL PASSAGE. 90

.LONG TERM...PREVIOUS DISCUSSION...A MOIST WEST/NORTHWEST FLOW WILL
CONTINUE THROUGH MUCH OF THE EXTENDED...WITH A COLD FRONT EXPECTED
NEXT WEDNESDAY EVENING. ON AND OFF BREEZY CONDITIONS CAN BE EXPECTED
ACROSS THE LOWER ELEVATIONS...AS 850MB JETS WILL RANGE FROM 30-
45KTS. RIGHT NOW THE BEST CHANCES OF PRECIPITATION LOOK TO BE
SATURDAY NIGHT THROUGH MONDAY NIGHT. WITH MODELS INDICATING 48HR
PRECIP TOTALS OF OVER 1.25" ACROSS THE NORTHERN BLUE MOUNTAINS...AND
OVER 2" FOR THE EAGLE CAPS AND THE WASHINGTON CASCADE CREST.

BY MONDAY NIGHT THERE WILL STILL BE CHANCES OF PRECIPITATION...BUT
MODELS ARE IN SLIGHT DISAGREEMENT AS TO HOW MUCH. THIS IS DUE TO
HIGH PRESSURE ATTEMPTING TO PUSH NORTH...ALLOWING FOR DRIER AIR TO
INTRUDE. SOME MODELS SUGGEST THAT ALMOST ALL AREAS WILL BE DRY WITH
7000+ FT MSL SNOW LEVELS FROM MONDAY NIGHT THROUGH WEDNESDAY. HAVE
TRIED TO MEET THE MODELS IN THE MIDDLE WITH POPS FOR THIS TIME
PERIOD.

NEXT COLD FRONT IS EXPECTED TO MOVE IN WEDNESDAY EVENING...WITH
SHOWERS AHEAD OF THIS FRONTAL SYSTEM ON WEDNESDAY DURING THE DAY.
RIGHT NOW WILL ONLY LOWER SNOW LEVELS DOWN TO ABOUT 4000 FT MSL ON
WEDNESDAY NIGHT INTO THURSDAY MORNING...AS THE COLDEST AIR WILL BE
IN ON THURSDAY AFTERNOON. ALTHOUGH THE CURRENT FORECAST DISCUSSION
WILL ONLY GO OUT THROUGH THURSDAY...IT APPEARS THIS WILL BE ANOTHER
FAST MOVING COLD FRONT WITH WARM AIR RETURNING NEXT WEEKEND.

&&

.AVIATION...18Z TAFS...WEAK DISTURBANCES WILL BE CROSSING THE AREA
FOR THE NEXT 24 HOURS WITH OCCASIONAL PERIODS OF SHOWERS ACROSS THE
AREA. CHANCES WILL BE HIGHER NEAR THE CASCADES AND IN THE WASHINGTON
PORTION OF THE AREA. VFR CONDITIONS WILL PREDOMINATE THOUGH MVFR
CEILINGS AND VISIBILITIES WILL BE POSSIBLE WITH THE HEAVIER SHOWERS.
HAVE -SHRA AT TIMES AT ALL TAF SITES EXCEPT KPSC, KALW AND KPDT
WHERE VCSH WAS USED. IN GENERAL, -SHRA WILL INCREASE THIS AFTERNOON,
DECREASE TONIGHT AND BEGIN TO INCREASE AGAIN AFTER 15Z TOMORROW
MORNING. MODELS HINT AT SOME BR TOMORROW MORNING IN A FEW PLACES SO
HAVE 4-6SM TOMORROW MORNING AT KDLS, KYKM AND KALW. WINDS WILL
REMAIN BELOW 15 KTS FOR THE NEXT 24 HOURS. PERRY

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  51  40  52  39 /  20  20  40  50
ALW  48  43  53  42 /  20  20  40  50
PSC  50  37  52  36 /  20  20  40  30
YKM  48  37  49  36 /  30  40  30  30
HRI  52  39  53  38 /  20  20  40  40
ELN  41  32  45  31 /  40  50  40  30
RDM  57  37  57  36 /  30  20  30  30
LGD  48  38  51  37 /  10  20  20  40
GCD  54  36  55  35 /  20  20  10  40
DLS  53  41  54  40 /  30  30  40  30

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR ORZ041-044-
     050-505-507-508-510.

WA...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR WAZ024-
     026>029-520-521.

&&

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

$$

90/89/83





000
FXUS66 KPDT 111755 AAA
AFDPDT

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE PENDLETON OR
955 AM PST THU FEB 11 2016

UPDATED AVIATION DISCUSSION

.SHORT TERM...MORNING UPDATE...AN UPPER RIDGE REMAINS OVER THE
WESTERN U.S. AND HAS STRENGTHENED OVER THE PACIFIC NORTHWEST. THE
FLOW OVER THE TOP OF THE RIDGE (AND ACROSS THE PACNW) REMAINS MOIST
WITH EMBEDDED WEAK DISTURBANCES. THUS CAN EXPECT VARYING COVERAGES
OF SHOWERS OVER THE AREA TODAY INTO TONIGHT. AS SUCH DID INCREASE
POPS SLIGHTLY ACROSS THE AREA FOR TODAY. LOW LEVEL INVERSIONS REMAIN
OVER PORTIONS OF THE AREA THIS MORNING, THOUGH THEY ARE WEAKER THAN
EARLIER THIS WEEK. A FEW LOCATIONS WERE SEEING VISIBILITIES OF 2-5
MILES IN FOG, THUS ADDED A MENTION OF FOG TO PORTIONS OF THE BASIN
FOR THE MORNING. THESE INVERSIONS WILL LAST AT LEAST INTO FRIDAY IF
NOT INTO SATURDAY MORNING. SOME AREAS, MAINLY IN OREGON, MAY MIX OUT
FRIDAY AFTERNOON AFTER AN EXPECTED COLD FRONTAL PASSAGE. 90

.LONG TERM...PREVIOUS DISCUSSION...A MOIST WEST/NORTHWEST FLOW WILL
CONTINUE THROUGH MUCH OF THE EXTENDED...WITH A COLD FRONT EXPECTED
NEXT WEDNESDAY EVENING. ON AND OFF BREEZY CONDITIONS CAN BE EXPECTED
ACROSS THE LOWER ELEVATIONS...AS 850MB JETS WILL RANGE FROM 30-
45KTS. RIGHT NOW THE BEST CHANCES OF PRECIPITATION LOOK TO BE
SATURDAY NIGHT THROUGH MONDAY NIGHT. WITH MODELS INDICATING 48HR
PRECIP TOTALS OF OVER 1.25" ACROSS THE NORTHERN BLUE MOUNTAINS...AND
OVER 2" FOR THE EAGLE CAPS AND THE WASHINGTON CASCADE CREST.

BY MONDAY NIGHT THERE WILL STILL BE CHANCES OF PRECIPITATION...BUT
MODELS ARE IN SLIGHT DISAGREEMENT AS TO HOW MUCH. THIS IS DUE TO
HIGH PRESSURE ATTEMPTING TO PUSH NORTH...ALLOWING FOR DRIER AIR TO
INTRUDE. SOME MODELS SUGGEST THAT ALMOST ALL AREAS WILL BE DRY WITH
7000+ FT MSL SNOW LEVELS FROM MONDAY NIGHT THROUGH WEDNESDAY. HAVE
TRIED TO MEET THE MODELS IN THE MIDDLE WITH POPS FOR THIS TIME
PERIOD.

NEXT COLD FRONT IS EXPECTED TO MOVE IN WEDNESDAY EVENING...WITH
SHOWERS AHEAD OF THIS FRONTAL SYSTEM ON WEDNESDAY DURING THE DAY.
RIGHT NOW WILL ONLY LOWER SNOW LEVELS DOWN TO ABOUT 4000 FT MSL ON
WEDNESDAY NIGHT INTO THURSDAY MORNING...AS THE COLDEST AIR WILL BE
IN ON THURSDAY AFTERNOON. ALTHOUGH THE CURRENT FORECAST DISCUSSION
WILL ONLY GO OUT THROUGH THURSDAY...IT APPEARS THIS WILL BE ANOTHER
FAST MOVING COLD FRONT WITH WARM AIR RETURNING NEXT WEEKEND.

&&

.AVIATION...18Z TAFS...WEAK DISTURBANCES WILL BE CROSSING THE AREA
FOR THE NEXT 24 HOURS WITH OCCASIONAL PERIODS OF SHOWERS ACROSS THE
AREA. CHANCES WILL BE HIGHER NEAR THE CASCADES AND IN THE WASHINGTON
PORTION OF THE AREA. VFR CONDITIONS WILL PREDOMINATE THOUGH MVFR
CEILINGS AND VISIBILITIES WILL BE POSSIBLE WITH THE HEAVIER SHOWERS.
HAVE -SHRA AT TIMES AT ALL TAF SITES EXCEPT KPSC, KALW AND KPDT
WHERE VCSH WAS USED. IN GENERAL, -SHRA WILL INCREASE THIS AFTERNOON,
DECREASE TONIGHT AND BEGIN TO INCREASE AGAIN AFTER 15Z TOMORROW
MORNING. MODELS HINT AT SOME BR TOMORROW MORNING IN A FEW PLACES SO
HAVE 4-6SM TOMORROW MORNING AT KDLS, KYKM AND KALW. WINDS WILL
REMAIN BELOW 15 KTS FOR THE NEXT 24 HOURS. PERRY

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  51  40  52  39 /  20  20  40  50
ALW  48  43  53  42 /  20  20  40  50
PSC  50  37  52  36 /  20  20  40  30
YKM  48  37  49  36 /  30  40  30  30
HRI  52  39  53  38 /  20  20  40  40
ELN  41  32  45  31 /  40  50  40  30
RDM  57  37  57  36 /  30  20  30  30
LGD  48  38  51  37 /  10  20  20  40
GCD  54  36  55  35 /  20  20  10  40
DLS  53  41  54  40 /  30  30  40  30

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR ORZ041-044-
     050-505-507-508-510.

WA...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR WAZ024-
     026>029-520-521.

&&

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

$$

90/89/83





000
FXUS66 KPDT 111733
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
933 AM PST THU FEB 11 2016

.SHORT TERM...MORNING UPDATE...AN UPPER RIDGE REMAINS OVER THE
WESTERN U.S. AND HAS STRENGTHENED OVER THE PACIFIC NORTHWEST. THE
FLOW OVER THE TOP OF THE RIDGE (AND ACROSS THE PACNW) REMAINS MOIST
WITH EMBEDDED WEAK DISTURBANCES. THUS CAN EXPECT VARYING COVERAGES
OF SHOWERS OVER THE AREA TODAY INTO TONIGHT. AS SUCH DID INCREASE
POPS SLIGHTLY ACROSS THE AREA FOR TODAY. LOW LEVEL INVERSIONS REMAIN
OVER PORTIONS OF THE AREA THIS MORNING, THOUGH THEY ARE WEAKER THAN
EARLIER THIS WEEK. A FEW LOCATIONS WERE SEEING VISIBILITIES OF 2-5
MILES IN FOG, THUS ADDED A MENTION OF FOG TO PORTIONS OF THE BASIN
FOR THE MORNING. THESE INVERSIONS WILL LAST AT LEAST INTO FRIDAY IF
NOT INTO SATURDAY MORNING. SOME AREAS, MAINLY IN OREGON, MAY MIX OUT
FRIDAY AFTERNOON AFTER AN EXPECTED COLD FRONTAL PASSAGE. 90

.LONG TERM...PREVIOUS DISCUSSION...A MOIST WEST/NORTHWEST FLOW WILL
CONTINUE THROUGH MUCH OF THE EXTENDED...WITH A COLD FRONT EXPECTED
NEXT WEDNESDAY EVENING. ON AND OFF BREEZY CONDITIONS CAN BE EXPECTED
ACROSS THE LOWER ELEVATIONS...AS 850MB JETS WILL RANGE FROM 30-
45KTS. RIGHT NOW THE BEST CHANCES OF PRECIPITATION LOOK TO BE
SATURDAY NIGHT THROUGH MONDAY NIGHT. WITH MODELS INDICATING 48HR
PRECIP TOTALS OF OVER 1.25" ACROSS THE NORTHERN BLUE MOUNTAINS...AND
OVER 2" FOR THE EAGLE CAPS AND THE WASHINGTON CASCADE CREST.

BY MONDAY NIGHT THERE WILL STILL BE CHANCES OF PRECIPITATION...BUT
MODELS ARE IN SLIGHT DISAGREEMENT AS TO HOW MUCH. THIS IS DUE TO
HIGH PRESSURE ATTEMPTING TO PUSH NORTH...ALLOWING FOR DRIER AIR TO
INTRUDE. SOME MODELS SUGGEST THAT ALMOST ALL AREAS WILL BE DRY WITH
7000+ FT MSL SNOW LEVELS FROM MONDAY NIGHT THROUGH WEDNESDAY. HAVE
TRIED TO MEET THE MODELS IN THE MIDDLE WITH POPS FOR THIS TIME
PERIOD.

NEXT COLD FRONT IS EXPECTED TO MOVE IN WEDNESDAY EVENING...WITH
SHOWERS AHEAD OF THIS FRONTAL SYSTEM ON WEDNESDAY DURING THE DAY.
RIGHT NOW WILL ONLY LOWER SNOW LEVELS DOWN TO ABOUT 4000 FT MSL ON
WEDNESDAY NIGHT INTO THURSDAY MORNING...AS THE COLDEST AIR WILL BE
IN ON THURSDAY AFTERNOON. ALTHOUGH THE CURRENT FORECAST DISCUSSION
WILL ONLY GO OUT THROUGH THURSDAY...IT APPEARS THIS WILL BE ANOTHER
FAST MOVING COLD FRONT WITH WARM AIR RETURNING NEXT WEEKEND.

&&

.AVIATION...PREVIOUS DISCUSSION...12Z TAFS...WITH THE EXCEPTION OF
KDLS...AND KYKM...ALL TAF SITES ARE EXPECTED TO CONTINUE WITH VFR
CONDITIONS THROUGH 06Z/12...WITH MVFR/IFR CONDITIONS POSSIBLE AFTER
06Z/12. THESE TWO TAF SITES HAVE THE BEST CHANCES FOR RAIN FROM 18Z
ONWARD. OTHER TAF SITES MAY EXPERIENCE VCSH. CLOUDS WILL CONTINUE TO
THICKEN FROM 10K-18K FT CIGS LOWERING TO 5K-10K THIS MORNING. WINDS
WILL BE 10 KTS OR LESS THROUGH THE PERIOD.

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  51  40  52  39 /  20  20  40  50
ALW  48  43  53  42 /  20  20  40  50
PSC  50  37  52  36 /  20  20  40  30
YKM  48  37  49  36 /  30  40  30  30
HRI  52  39  53  38 /  20  20  40  40
ELN  41  32  45  31 /  40  50  40  30
RDM  57  37  57  36 /  30  20  30  30
LGD  48  38  51  37 /  10  20  20  40
GCD  54  36  55  35 /  20  20  10  40
DLS  53  41  54  40 /  30  30  40  30

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR ORZ041-044-
     050-505-507-508-510.

WA...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR WAZ024-
     026>029-520-521.

&&

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

$$

90/89/83





000
FXUS66 KPDT 111200 AAA
AFDPDT

AREA FORECAST DISCUSSION...UPDATE
NATIONAL WEATHER SERVICE PENDLETON OR
400 AM PST THU FEB 11 2016

UPDATED FOR AVIATION DISCUSSION

.SHORT TERM...TODAY THROUGH SATURDAY...A PACIFIC WEATHER SYSTEM WITH
A WARM FRONT AND THEN A COLD FRONT WILL MOVE INTO THE REGION TODAY
AGAINST A WEAKENING BUT PERSISTENT UPPER HIGH PRESSURE RIDGE. THIS
RIDGE WILL KEEP MOST OF THE PRECIPITATION OVER NORTHWEST AREAS OF
THE CWA THIS MORNING. THEN THIS AFTERNOON AND TONIGHT AS THE UPPER
RIDGE WEAKENS FURTHER SOME OF THE INCOMING MOISTURE FROM THE WEST
WILL SPILL OVER THE CASCADES AND SPREAD EASTWARD ACROSS MOST OF THE
REST OF THE CWA. THE BEST CHANCE OF PRECIPITATION EAST OF THE
CASCADES WILL BE OVER THE EASTERN MOUNTAINS THIS AFTERNOON...AND A
SLIGHT CHANCE IN MOST AREAS TONIGHT. ON FRIDAY THE UPPER RIDGE WILL
BE PUSHED TO THE EAST BY AN ADVANCING UPPER TROUGH OFF THE COAST.
THIS WILL ALLOW MORE MOISTURE TO SPREAD ACROSS THE CWA RESULTING IN
A BETTER CHANCE OF SHOWERS FOR MOST AREAS OF THE CWA BY FRIDAY
AFTERNOON GOING INTO FRIDAY EVENING. THEN ON SATURDAY AN OPEN UPPER
TROUGH WILL MOVE ACROSS THE FORECAST AREA WITH SHOWERS CONTINUING
MAINLY FROM THE BLUE MOUNTAIN FOOTHILLS EASTWARD AND SOUTHWARD AND
ALSO ALONG THE CASCADE EAST SLOPES OF OR/WA. DOWNSLOPE WINDS OFF THE
CASCADES WILL CAUSE RAIN SHADOWING WHICH WILL KEEP THE LOWER
COLUMBIA BASIN AND ADJACENT VALLEYS EAST OF THE CASCADES DOWN
THROUGH CENTRAL OREGON MOSTLY DRY. WITH THE EXCEPTION OF BREEZY TO
WINDY CONDITIONS IN THE SOUTHERN GRANDE RONDE VALLEY WINDS WILL BE
LIGHT THROUGH THE SHORT TERM PERIOD AND TEMPERATURES WILL REMAIN
ABOVE NORMAL. 88

.LONG TERM...SATURDAY NIGHT THROUGH THURSDAY...A MOIST
WEST/NORTHWEST FLOW WILL CONTINUE THROUGH MUCH OF THE
EXTENDED...WITH A COLD FRONT EXPECTED NEXT WEDNESDAY EVENING.  ON
AND OFF BREEZY CONDITIONS CAN BE EXPECTED ACROSS THE LOWER
ELEVATIONS...AS 850MB JETS WILL RANGE FROM 30-45KTS. RIGHT NOW THE
BEST CHANCES OF PRECIPITATION LOOK TO BE SATURDAY NIGHT THROUGH
MONDAY NIGHT.  WITH MODELS INDICATING 48HR PRECIP TOTALS OF OVER
1.25" ACROSS THE NORTHERN BLUE MOUNTAINS...AND OVER 2" FOR THE EAGLE
CAPS AND THE WASHINGTON CASCADE CREST.

BY MONDAY NIGHT THERE WILL STILL BE CHANCES OF PRECIPITATION...BUT
MODELS ARE IN SLIGHT DISAGREEMENT AS TO HOW MUCH.  THIS IS DUE TO
HIGH PRESSURE ATTEMPTING TO PUSH NORTH...ALLOWING FOR DRIER AIR TO
INTRUDE. SOME MODELS SUGGEST THAT ALMOST ALL AREAS WILL BE DRY WITH
7000+ FT MSL SNOW LEVELS FROM MONDAY NIGHT THROUGH WEDNESDAY. HAVE
TRIED TO MEET THE MODELS IN THE MIDDLE WITH POPS FOR THIS TIME
PERIOD.

NEXT COLD FRONT IS EXPECTED TO MOVE IN WEDNESDAY EVENING...WITH
SHOWERS AHEAD OF THIS FRONTAL SYSTEM ON WEDNESDAY DURING THE DAY.
RIGHT NOW WILL ONLY LOWER SNOW LEVELS DOWN TO ABOUT 4000 FT MSL ON
WEDNESDAY NIGHT INTO THURSDAY MORNING...AS THE COLDEST AIR WILL BE
IN ON THURSDAY AFTERNOON.  ALTHOUGH THE CURRENT FORECAST DISCUSSION
WILL ONLY GO OUT THROUGH THURSDAY...IT APPEARS THIS WILL BE ANOTHER
FAST MOVING COLD FRONT WITH WARM AIR RETURNING NEXT WEEKEND. WEBER

&&

.AVIATION...12Z TAFS...WITH THE EXCEPTION OF KDLS...AND KYKM...ALL
TAF SITES ARE EXPECTED TO CONTINUE WITH VFR CONDITIONS THROUGH
06Z/12...WITH MVFR/IFR CONDITIONS POSSIBLE AFTER 06Z/12. THESE TWO
TAF SITES HAVE THE BEST CHANCES FOR RAIN FROM 18Z ONWARD. OTHER TAF
SITES MAY EXPERIANCE VCSH. CLOUDS WILL CONTINUE TO THICKEN FROM 10K-
18K FT CIGS LOWERING TO 5K-10K THIS MORNING. WINDS WILL BE 10 KTS OR
LESS THROUGH THE PERIOD. WEBER

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  49  40  52  39 /  10  20  40  50
ALW  49  43  53  42 /  10  20  40  50
PSC  50  37  52  36 /  10  20  40  30
YKM  48  37  49  36 /  30  40  30  30
HRI  52  39  53  38 /  10  20  40  40
ELN  41  32  45  31 /  40  50  40  30
RDM  57  37  57  36 /  10  20  30  30
LGD  48  38  51  37 /  10  20  20  40
GCD  54  36  55  35 /  10  20  10  40
DLS  53  41  54  40 /  30  30  40  30

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR ORZ041-044-
     050-505-507-508-510.

WA...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR WAZ024-
     026>029-520-521.

&&

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

$$

88/89/89





000
FXUS66 KPDT 111200 AAA
AFDPDT

AREA FORECAST DISCUSSION...UPDATE
NATIONAL WEATHER SERVICE PENDLETON OR
400 AM PST THU FEB 11 2016

UPDATED FOR AVIATION DISCUSSION

.SHORT TERM...TODAY THROUGH SATURDAY...A PACIFIC WEATHER SYSTEM WITH
A WARM FRONT AND THEN A COLD FRONT WILL MOVE INTO THE REGION TODAY
AGAINST A WEAKENING BUT PERSISTENT UPPER HIGH PRESSURE RIDGE. THIS
RIDGE WILL KEEP MOST OF THE PRECIPITATION OVER NORTHWEST AREAS OF
THE CWA THIS MORNING. THEN THIS AFTERNOON AND TONIGHT AS THE UPPER
RIDGE WEAKENS FURTHER SOME OF THE INCOMING MOISTURE FROM THE WEST
WILL SPILL OVER THE CASCADES AND SPREAD EASTWARD ACROSS MOST OF THE
REST OF THE CWA. THE BEST CHANCE OF PRECIPITATION EAST OF THE
CASCADES WILL BE OVER THE EASTERN MOUNTAINS THIS AFTERNOON...AND A
SLIGHT CHANCE IN MOST AREAS TONIGHT. ON FRIDAY THE UPPER RIDGE WILL
BE PUSHED TO THE EAST BY AN ADVANCING UPPER TROUGH OFF THE COAST.
THIS WILL ALLOW MORE MOISTURE TO SPREAD ACROSS THE CWA RESULTING IN
A BETTER CHANCE OF SHOWERS FOR MOST AREAS OF THE CWA BY FRIDAY
AFTERNOON GOING INTO FRIDAY EVENING. THEN ON SATURDAY AN OPEN UPPER
TROUGH WILL MOVE ACROSS THE FORECAST AREA WITH SHOWERS CONTINUING
MAINLY FROM THE BLUE MOUNTAIN FOOTHILLS EASTWARD AND SOUTHWARD AND
ALSO ALONG THE CASCADE EAST SLOPES OF OR/WA. DOWNSLOPE WINDS OFF THE
CASCADES WILL CAUSE RAIN SHADOWING WHICH WILL KEEP THE LOWER
COLUMBIA BASIN AND ADJACENT VALLEYS EAST OF THE CASCADES DOWN
THROUGH CENTRAL OREGON MOSTLY DRY. WITH THE EXCEPTION OF BREEZY TO
WINDY CONDITIONS IN THE SOUTHERN GRANDE RONDE VALLEY WINDS WILL BE
LIGHT THROUGH THE SHORT TERM PERIOD AND TEMPERATURES WILL REMAIN
ABOVE NORMAL. 88

.LONG TERM...SATURDAY NIGHT THROUGH THURSDAY...A MOIST
WEST/NORTHWEST FLOW WILL CONTINUE THROUGH MUCH OF THE
EXTENDED...WITH A COLD FRONT EXPECTED NEXT WEDNESDAY EVENING.  ON
AND OFF BREEZY CONDITIONS CAN BE EXPECTED ACROSS THE LOWER
ELEVATIONS...AS 850MB JETS WILL RANGE FROM 30-45KTS. RIGHT NOW THE
BEST CHANCES OF PRECIPITATION LOOK TO BE SATURDAY NIGHT THROUGH
MONDAY NIGHT.  WITH MODELS INDICATING 48HR PRECIP TOTALS OF OVER
1.25" ACROSS THE NORTHERN BLUE MOUNTAINS...AND OVER 2" FOR THE EAGLE
CAPS AND THE WASHINGTON CASCADE CREST.

BY MONDAY NIGHT THERE WILL STILL BE CHANCES OF PRECIPITATION...BUT
MODELS ARE IN SLIGHT DISAGREEMENT AS TO HOW MUCH.  THIS IS DUE TO
HIGH PRESSURE ATTEMPTING TO PUSH NORTH...ALLOWING FOR DRIER AIR TO
INTRUDE. SOME MODELS SUGGEST THAT ALMOST ALL AREAS WILL BE DRY WITH
7000+ FT MSL SNOW LEVELS FROM MONDAY NIGHT THROUGH WEDNESDAY. HAVE
TRIED TO MEET THE MODELS IN THE MIDDLE WITH POPS FOR THIS TIME
PERIOD.

NEXT COLD FRONT IS EXPECTED TO MOVE IN WEDNESDAY EVENING...WITH
SHOWERS AHEAD OF THIS FRONTAL SYSTEM ON WEDNESDAY DURING THE DAY.
RIGHT NOW WILL ONLY LOWER SNOW LEVELS DOWN TO ABOUT 4000 FT MSL ON
WEDNESDAY NIGHT INTO THURSDAY MORNING...AS THE COLDEST AIR WILL BE
IN ON THURSDAY AFTERNOON.  ALTHOUGH THE CURRENT FORECAST DISCUSSION
WILL ONLY GO OUT THROUGH THURSDAY...IT APPEARS THIS WILL BE ANOTHER
FAST MOVING COLD FRONT WITH WARM AIR RETURNING NEXT WEEKEND. WEBER

&&

.AVIATION...12Z TAFS...WITH THE EXCEPTION OF KDLS...AND KYKM...ALL
TAF SITES ARE EXPECTED TO CONTINUE WITH VFR CONDITIONS THROUGH
06Z/12...WITH MVFR/IFR CONDITIONS POSSIBLE AFTER 06Z/12. THESE TWO
TAF SITES HAVE THE BEST CHANCES FOR RAIN FROM 18Z ONWARD. OTHER TAF
SITES MAY EXPERIANCE VCSH. CLOUDS WILL CONTINUE TO THICKEN FROM 10K-
18K FT CIGS LOWERING TO 5K-10K THIS MORNING. WINDS WILL BE 10 KTS OR
LESS THROUGH THE PERIOD. WEBER

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  49  40  52  39 /  10  20  40  50
ALW  49  43  53  42 /  10  20  40  50
PSC  50  37  52  36 /  10  20  40  30
YKM  48  37  49  36 /  30  40  30  30
HRI  52  39  53  38 /  10  20  40  40
ELN  41  32  45  31 /  40  50  40  30
RDM  57  37  57  36 /  10  20  30  30
LGD  48  38  51  37 /  10  20  20  40
GCD  54  36  55  35 /  10  20  10  40
DLS  53  41  54  40 /  30  30  40  30

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR ORZ041-044-
     050-505-507-508-510.

WA...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR WAZ024-
     026>029-520-521.

&&

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

$$

88/89/89





000
FXUS66 KPDT 111200 AAA
AFDPDT

AREA FORECAST DISCUSSION...UPDATE
NATIONAL WEATHER SERVICE PENDLETON OR
400 AM PST THU FEB 11 2016

UPDATED FOR AVIATION DISCUSSION

.SHORT TERM...TODAY THROUGH SATURDAY...A PACIFIC WEATHER SYSTEM WITH
A WARM FRONT AND THEN A COLD FRONT WILL MOVE INTO THE REGION TODAY
AGAINST A WEAKENING BUT PERSISTENT UPPER HIGH PRESSURE RIDGE. THIS
RIDGE WILL KEEP MOST OF THE PRECIPITATION OVER NORTHWEST AREAS OF
THE CWA THIS MORNING. THEN THIS AFTERNOON AND TONIGHT AS THE UPPER
RIDGE WEAKENS FURTHER SOME OF THE INCOMING MOISTURE FROM THE WEST
WILL SPILL OVER THE CASCADES AND SPREAD EASTWARD ACROSS MOST OF THE
REST OF THE CWA. THE BEST CHANCE OF PRECIPITATION EAST OF THE
CASCADES WILL BE OVER THE EASTERN MOUNTAINS THIS AFTERNOON...AND A
SLIGHT CHANCE IN MOST AREAS TONIGHT. ON FRIDAY THE UPPER RIDGE WILL
BE PUSHED TO THE EAST BY AN ADVANCING UPPER TROUGH OFF THE COAST.
THIS WILL ALLOW MORE MOISTURE TO SPREAD ACROSS THE CWA RESULTING IN
A BETTER CHANCE OF SHOWERS FOR MOST AREAS OF THE CWA BY FRIDAY
AFTERNOON GOING INTO FRIDAY EVENING. THEN ON SATURDAY AN OPEN UPPER
TROUGH WILL MOVE ACROSS THE FORECAST AREA WITH SHOWERS CONTINUING
MAINLY FROM THE BLUE MOUNTAIN FOOTHILLS EASTWARD AND SOUTHWARD AND
ALSO ALONG THE CASCADE EAST SLOPES OF OR/WA. DOWNSLOPE WINDS OFF THE
CASCADES WILL CAUSE RAIN SHADOWING WHICH WILL KEEP THE LOWER
COLUMBIA BASIN AND ADJACENT VALLEYS EAST OF THE CASCADES DOWN
THROUGH CENTRAL OREGON MOSTLY DRY. WITH THE EXCEPTION OF BREEZY TO
WINDY CONDITIONS IN THE SOUTHERN GRANDE RONDE VALLEY WINDS WILL BE
LIGHT THROUGH THE SHORT TERM PERIOD AND TEMPERATURES WILL REMAIN
ABOVE NORMAL. 88

.LONG TERM...SATURDAY NIGHT THROUGH THURSDAY...A MOIST
WEST/NORTHWEST FLOW WILL CONTINUE THROUGH MUCH OF THE
EXTENDED...WITH A COLD FRONT EXPECTED NEXT WEDNESDAY EVENING.  ON
AND OFF BREEZY CONDITIONS CAN BE EXPECTED ACROSS THE LOWER
ELEVATIONS...AS 850MB JETS WILL RANGE FROM 30-45KTS. RIGHT NOW THE
BEST CHANCES OF PRECIPITATION LOOK TO BE SATURDAY NIGHT THROUGH
MONDAY NIGHT.  WITH MODELS INDICATING 48HR PRECIP TOTALS OF OVER
1.25" ACROSS THE NORTHERN BLUE MOUNTAINS...AND OVER 2" FOR THE EAGLE
CAPS AND THE WASHINGTON CASCADE CREST.

BY MONDAY NIGHT THERE WILL STILL BE CHANCES OF PRECIPITATION...BUT
MODELS ARE IN SLIGHT DISAGREEMENT AS TO HOW MUCH.  THIS IS DUE TO
HIGH PRESSURE ATTEMPTING TO PUSH NORTH...ALLOWING FOR DRIER AIR TO
INTRUDE. SOME MODELS SUGGEST THAT ALMOST ALL AREAS WILL BE DRY WITH
7000+ FT MSL SNOW LEVELS FROM MONDAY NIGHT THROUGH WEDNESDAY. HAVE
TRIED TO MEET THE MODELS IN THE MIDDLE WITH POPS FOR THIS TIME
PERIOD.

NEXT COLD FRONT IS EXPECTED TO MOVE IN WEDNESDAY EVENING...WITH
SHOWERS AHEAD OF THIS FRONTAL SYSTEM ON WEDNESDAY DURING THE DAY.
RIGHT NOW WILL ONLY LOWER SNOW LEVELS DOWN TO ABOUT 4000 FT MSL ON
WEDNESDAY NIGHT INTO THURSDAY MORNING...AS THE COLDEST AIR WILL BE
IN ON THURSDAY AFTERNOON.  ALTHOUGH THE CURRENT FORECAST DISCUSSION
WILL ONLY GO OUT THROUGH THURSDAY...IT APPEARS THIS WILL BE ANOTHER
FAST MOVING COLD FRONT WITH WARM AIR RETURNING NEXT WEEKEND. WEBER

&&

.AVIATION...12Z TAFS...WITH THE EXCEPTION OF KDLS...AND KYKM...ALL
TAF SITES ARE EXPECTED TO CONTINUE WITH VFR CONDITIONS THROUGH
06Z/12...WITH MVFR/IFR CONDITIONS POSSIBLE AFTER 06Z/12. THESE TWO
TAF SITES HAVE THE BEST CHANCES FOR RAIN FROM 18Z ONWARD. OTHER TAF
SITES MAY EXPERIANCE VCSH. CLOUDS WILL CONTINUE TO THICKEN FROM 10K-
18K FT CIGS LOWERING TO 5K-10K THIS MORNING. WINDS WILL BE 10 KTS OR
LESS THROUGH THE PERIOD. WEBER

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  49  40  52  39 /  10  20  40  50
ALW  49  43  53  42 /  10  20  40  50
PSC  50  37  52  36 /  10  20  40  30
YKM  48  37  49  36 /  30  40  30  30
HRI  52  39  53  38 /  10  20  40  40
ELN  41  32  45  31 /  40  50  40  30
RDM  57  37  57  36 /  10  20  30  30
LGD  48  38  51  37 /  10  20  20  40
GCD  54  36  55  35 /  10  20  10  40
DLS  53  41  54  40 /  30  30  40  30

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR ORZ041-044-
     050-505-507-508-510.

WA...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR WAZ024-
     026>029-520-521.

&&

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

$$

88/89/89




000
FXUS66 KPDT 111041
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
241 AM PST THU FEB 11 2016

.SHORT TERM...TODAY THROUGH SATURDAY...A PACIFIC WEATHER SYSTEM WITH
A WARM FRONT AND THEN A COLD FRONT WILL MOVE INTO THE REGION TODAY
AGAINST A WEAKENING BUT PERSISTENT UPPER HIGH PRESSURE RIDGE. THIS
RIDGE WILL KEEP MOST OF THE PRECIPITATION OVER NORTHWEST AREAS OF
THE CWA THIS MORNING. THEN THIS AFTERNOON AND TONIGHT AS THE UPPER
RIDGE WEAKENS FURTHER SOME OF THE INCOMING MOISTURE FROM THE WEST
WILL SPILL OVER THE CASCADES AND SPREAD EASTWARD ACROSS MOST OF THE
REST OF THE CWA. THE BEST CHANCE OF PRECIPITATION EAST OF THE
CASCADES WILL BE OVER THE EASTERN MOUNTAINS THIS AFTERNOON...AND A
SLIGHT CHANCE IN MOST AREAS TONIGHT. ON FRIDAY THE UPPER RIDGE WILL
BE PUSHED TO THE EAST BY AN ADVANCING UPPER TROUGH OFF THE COAST.
THIS WILL ALLOW MORE MOISTURE TO SPREAD ACROSS THE CWA RESULTING IN
A BETTER CHANCE OF SHOWERS FOR MOST AREAS OF THE CWA BY FRIDAY
AFTERNOON GOING INTO FRIDAY EVENING. THEN ON SATURDAY AN OPEN UPPER
TROUGH WILL MOVE ACROSS THE FORECAST AREA WITH SHOWERS CONTINUING
MAINLY FROM THE BLUE MOUNTAIN FOOTHILLS EASTWARD AND SOUTHWARD AND
ALSO ALONG THE CASCADE EAST SLOPES OF OR/WA. DOWNSLOPE WINDS OFF THE
CASCADES WILL CAUSE RAIN SHADOWING WHICH WILL KEEP THE LOWER
COLUMBIA BASIN AND ADJACENT VALLEYS EAST OF THE CASCADES DOWN
THROUGH CENTRAL OREGON MOSTLY DRY. WITH THE EXCEPTION OF BREEZY TO
WINDY CONDITIONS IN THE SOUTHERN GRANDE RONDE VALLEY WINDS WILL BE
LIGHT THROUGH THE SHORT TERM PERIOD AND TEMPERATURES WILL REMAIN
ABOVE NORMAL. 88

.LONG TERM...SATURDAY NIGHT THROUGH THURSDAY...A MOIST
WEST/NORTHWEST FLOW WILL CONTINUE THROUGH MUCH OF THE
EXTENDED...WITH A COLD FRONT EXPECTED NEXT WEDNESDAY EVENING.  ON
AND OFF BREEZY CONDITIONS CAN BE EXPECTED ACROSS THE LOWER
ELEVATIONS...AS 850MB JETS WILL RANGE FROM 30-45KTS. RIGHT NOW THE
BEST CHANCES OF PRECIPITATION LOOK TO BE SATURDAY NIGHT THROUGH
MONDAY NIGHT.  WITH MODELS INDICATING 48HR PRECIP TOTALS OF OVER
1.25" ACROSS THE NORTHERN BLUE MOUNTAINS...AND OVER 2" FOR THE EAGLE
CAPS AND THE WASHINGTON CASCADE CREST.

BY MONDAY NIGHT THERE WILL STILL BE CHANCES OF PRECIPITATION...BUT
MODELS ARE IN SLIGHT DISAGREEMENT AS TO HOW MUCH.  THIS IS DUE TO
HIGH PRESSURE ATTEMPTING TO PUSH NORTH...ALLOWING FOR DRIER AIR TO
INTRUDE. SOME MODELS SUGGEST THAT ALMOST ALL AREAS WILL BE DRY WITH
7000+ FT MSL SNOW LEVELS FROM MONDAY NIGHT THROUGH WEDNESDAY. HAVE
TRIED TO MEET THE MODELS IN THE MIDDLE WITH POPS FOR THIS TIME
PERIOD.

NEXT COLD FRONT IS EXPECTED TO MOVE IN WEDNESDAY EVENING...WITH
SHOWERS AHEAD OF THIS FRONTAL SYSTEM ON WEDNESDAY DURING THE DAY.
RIGHT NOW WILL ONLY LOWER SNOW LEVELS DOWN TO ABOUT 4000 FT MSL ON
WEDNESDAY NIGHT INTO THURSDAY MORNING...AS THE COLDEST AIR WILL BE
IN ON THURSDAY AFTERNOON.  ALTHOUGH THE CURRENT FORECAST DISCUSSION
WILL ONLY GO OUT THROUGH THURSDAY...IT APPEARS THIS WILL BE ANOTHER
FAST MOVING COLD FRONT WITH WARM AIR RETURNING NEXT WEEKEND. WEBER

&&

.AVIATION...06Z TAFS...UPDATE...WITH THE EXCEPTION OF KDLS...AND
KYKM...ALL TAF SITES ARE EXPECTED TO CONTINUE WITH VFR CONDITIONS
THROUGH06Z/12...WITH MVFR/IFR CONDITIONS POSSIBLE AFTER 06Z/12.
THESE TWO TAF SITES HAVE THE BEST CHANCES FOR RAIN FROM 18Z ONWARD.
CLOUDS WILL CONTINUE TO THICKEN FROM 10K-18K FT CIGS LOWERING TO 5K-
10K THIS MORNING. WINDS WILL BE 10 KTS OR LESS THROUGH THE PERIOD.
WEBER

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  49  40  52  39 /  10  20  40  50
ALW  49  43  53  42 /  10  20  40  50
PSC  50  37  52  36 /  10  20  40  30
YKM  48  37  49  36 /  30  40  30  30
HRI  52  39  53  38 /  10  20  40  40
ELN  41  32  45  31 /  40  50  40  30
RDM  57  37  57  36 /  10  20  30  30
LGD  48  38  51  37 /  10  20  20  40
GCD  54  36  55  35 /  10  20  10  40
DLS  53  41  54  40 /  30  30  40  30

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR ORZ041-044-
     050-505-507-508-510.

WA...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR WAZ024-
     026>029-520-521.

&&

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

$$

88/89/89





000
FXUS66 KPDT 111041
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
241 AM PST THU FEB 11 2016

.SHORT TERM...TODAY THROUGH SATURDAY...A PACIFIC WEATHER SYSTEM WITH
A WARM FRONT AND THEN A COLD FRONT WILL MOVE INTO THE REGION TODAY
AGAINST A WEAKENING BUT PERSISTENT UPPER HIGH PRESSURE RIDGE. THIS
RIDGE WILL KEEP MOST OF THE PRECIPITATION OVER NORTHWEST AREAS OF
THE CWA THIS MORNING. THEN THIS AFTERNOON AND TONIGHT AS THE UPPER
RIDGE WEAKENS FURTHER SOME OF THE INCOMING MOISTURE FROM THE WEST
WILL SPILL OVER THE CASCADES AND SPREAD EASTWARD ACROSS MOST OF THE
REST OF THE CWA. THE BEST CHANCE OF PRECIPITATION EAST OF THE
CASCADES WILL BE OVER THE EASTERN MOUNTAINS THIS AFTERNOON...AND A
SLIGHT CHANCE IN MOST AREAS TONIGHT. ON FRIDAY THE UPPER RIDGE WILL
BE PUSHED TO THE EAST BY AN ADVANCING UPPER TROUGH OFF THE COAST.
THIS WILL ALLOW MORE MOISTURE TO SPREAD ACROSS THE CWA RESULTING IN
A BETTER CHANCE OF SHOWERS FOR MOST AREAS OF THE CWA BY FRIDAY
AFTERNOON GOING INTO FRIDAY EVENING. THEN ON SATURDAY AN OPEN UPPER
TROUGH WILL MOVE ACROSS THE FORECAST AREA WITH SHOWERS CONTINUING
MAINLY FROM THE BLUE MOUNTAIN FOOTHILLS EASTWARD AND SOUTHWARD AND
ALSO ALONG THE CASCADE EAST SLOPES OF OR/WA. DOWNSLOPE WINDS OFF THE
CASCADES WILL CAUSE RAIN SHADOWING WHICH WILL KEEP THE LOWER
COLUMBIA BASIN AND ADJACENT VALLEYS EAST OF THE CASCADES DOWN
THROUGH CENTRAL OREGON MOSTLY DRY. WITH THE EXCEPTION OF BREEZY TO
WINDY CONDITIONS IN THE SOUTHERN GRANDE RONDE VALLEY WINDS WILL BE
LIGHT THROUGH THE SHORT TERM PERIOD AND TEMPERATURES WILL REMAIN
ABOVE NORMAL. 88

.LONG TERM...SATURDAY NIGHT THROUGH THURSDAY...A MOIST
WEST/NORTHWEST FLOW WILL CONTINUE THROUGH MUCH OF THE
EXTENDED...WITH A COLD FRONT EXPECTED NEXT WEDNESDAY EVENING.  ON
AND OFF BREEZY CONDITIONS CAN BE EXPECTED ACROSS THE LOWER
ELEVATIONS...AS 850MB JETS WILL RANGE FROM 30-45KTS. RIGHT NOW THE
BEST CHANCES OF PRECIPITATION LOOK TO BE SATURDAY NIGHT THROUGH
MONDAY NIGHT.  WITH MODELS INDICATING 48HR PRECIP TOTALS OF OVER
1.25" ACROSS THE NORTHERN BLUE MOUNTAINS...AND OVER 2" FOR THE EAGLE
CAPS AND THE WASHINGTON CASCADE CREST.

BY MONDAY NIGHT THERE WILL STILL BE CHANCES OF PRECIPITATION...BUT
MODELS ARE IN SLIGHT DISAGREEMENT AS TO HOW MUCH.  THIS IS DUE TO
HIGH PRESSURE ATTEMPTING TO PUSH NORTH...ALLOWING FOR DRIER AIR TO
INTRUDE. SOME MODELS SUGGEST THAT ALMOST ALL AREAS WILL BE DRY WITH
7000+ FT MSL SNOW LEVELS FROM MONDAY NIGHT THROUGH WEDNESDAY. HAVE
TRIED TO MEET THE MODELS IN THE MIDDLE WITH POPS FOR THIS TIME
PERIOD.

NEXT COLD FRONT IS EXPECTED TO MOVE IN WEDNESDAY EVENING...WITH
SHOWERS AHEAD OF THIS FRONTAL SYSTEM ON WEDNESDAY DURING THE DAY.
RIGHT NOW WILL ONLY LOWER SNOW LEVELS DOWN TO ABOUT 4000 FT MSL ON
WEDNESDAY NIGHT INTO THURSDAY MORNING...AS THE COLDEST AIR WILL BE
IN ON THURSDAY AFTERNOON.  ALTHOUGH THE CURRENT FORECAST DISCUSSION
WILL ONLY GO OUT THROUGH THURSDAY...IT APPEARS THIS WILL BE ANOTHER
FAST MOVING COLD FRONT WITH WARM AIR RETURNING NEXT WEEKEND. WEBER

&&

.AVIATION...06Z TAFS...UPDATE...WITH THE EXCEPTION OF KDLS...AND
KYKM...ALL TAF SITES ARE EXPECTED TO CONTINUE WITH VFR CONDITIONS
THROUGH06Z/12...WITH MVFR/IFR CONDITIONS POSSIBLE AFTER 06Z/12.
THESE TWO TAF SITES HAVE THE BEST CHANCES FOR RAIN FROM 18Z ONWARD.
CLOUDS WILL CONTINUE TO THICKEN FROM 10K-18K FT CIGS LOWERING TO 5K-
10K THIS MORNING. WINDS WILL BE 10 KTS OR LESS THROUGH THE PERIOD.
WEBER

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  49  40  52  39 /  10  20  40  50
ALW  49  43  53  42 /  10  20  40  50
PSC  50  37  52  36 /  10  20  40  30
YKM  48  37  49  36 /  30  40  30  30
HRI  52  39  53  38 /  10  20  40  40
ELN  41  32  45  31 /  40  50  40  30
RDM  57  37  57  36 /  10  20  30  30
LGD  48  38  51  37 /  10  20  20  40
GCD  54  36  55  35 /  10  20  10  40
DLS  53  41  54  40 /  30  30  40  30

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR ORZ041-044-
     050-505-507-508-510.

WA...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR WAZ024-
     026>029-520-521.

&&

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

$$

88/89/89




000
FXUS66 KPDT 111041
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
241 AM PST THU FEB 11 2016

.SHORT TERM...TODAY THROUGH SATURDAY...A PACIFIC WEATHER SYSTEM WITH
A WARM FRONT AND THEN A COLD FRONT WILL MOVE INTO THE REGION TODAY
AGAINST A WEAKENING BUT PERSISTENT UPPER HIGH PRESSURE RIDGE. THIS
RIDGE WILL KEEP MOST OF THE PRECIPITATION OVER NORTHWEST AREAS OF
THE CWA THIS MORNING. THEN THIS AFTERNOON AND TONIGHT AS THE UPPER
RIDGE WEAKENS FURTHER SOME OF THE INCOMING MOISTURE FROM THE WEST
WILL SPILL OVER THE CASCADES AND SPREAD EASTWARD ACROSS MOST OF THE
REST OF THE CWA. THE BEST CHANCE OF PRECIPITATION EAST OF THE
CASCADES WILL BE OVER THE EASTERN MOUNTAINS THIS AFTERNOON...AND A
SLIGHT CHANCE IN MOST AREAS TONIGHT. ON FRIDAY THE UPPER RIDGE WILL
BE PUSHED TO THE EAST BY AN ADVANCING UPPER TROUGH OFF THE COAST.
THIS WILL ALLOW MORE MOISTURE TO SPREAD ACROSS THE CWA RESULTING IN
A BETTER CHANCE OF SHOWERS FOR MOST AREAS OF THE CWA BY FRIDAY
AFTERNOON GOING INTO FRIDAY EVENING. THEN ON SATURDAY AN OPEN UPPER
TROUGH WILL MOVE ACROSS THE FORECAST AREA WITH SHOWERS CONTINUING
MAINLY FROM THE BLUE MOUNTAIN FOOTHILLS EASTWARD AND SOUTHWARD AND
ALSO ALONG THE CASCADE EAST SLOPES OF OR/WA. DOWNSLOPE WINDS OFF THE
CASCADES WILL CAUSE RAIN SHADOWING WHICH WILL KEEP THE LOWER
COLUMBIA BASIN AND ADJACENT VALLEYS EAST OF THE CASCADES DOWN
THROUGH CENTRAL OREGON MOSTLY DRY. WITH THE EXCEPTION OF BREEZY TO
WINDY CONDITIONS IN THE SOUTHERN GRANDE RONDE VALLEY WINDS WILL BE
LIGHT THROUGH THE SHORT TERM PERIOD AND TEMPERATURES WILL REMAIN
ABOVE NORMAL. 88

.LONG TERM...SATURDAY NIGHT THROUGH THURSDAY...A MOIST
WEST/NORTHWEST FLOW WILL CONTINUE THROUGH MUCH OF THE
EXTENDED...WITH A COLD FRONT EXPECTED NEXT WEDNESDAY EVENING.  ON
AND OFF BREEZY CONDITIONS CAN BE EXPECTED ACROSS THE LOWER
ELEVATIONS...AS 850MB JETS WILL RANGE FROM 30-45KTS. RIGHT NOW THE
BEST CHANCES OF PRECIPITATION LOOK TO BE SATURDAY NIGHT THROUGH
MONDAY NIGHT.  WITH MODELS INDICATING 48HR PRECIP TOTALS OF OVER
1.25" ACROSS THE NORTHERN BLUE MOUNTAINS...AND OVER 2" FOR THE EAGLE
CAPS AND THE WASHINGTON CASCADE CREST.

BY MONDAY NIGHT THERE WILL STILL BE CHANCES OF PRECIPITATION...BUT
MODELS ARE IN SLIGHT DISAGREEMENT AS TO HOW MUCH.  THIS IS DUE TO
HIGH PRESSURE ATTEMPTING TO PUSH NORTH...ALLOWING FOR DRIER AIR TO
INTRUDE. SOME MODELS SUGGEST THAT ALMOST ALL AREAS WILL BE DRY WITH
7000+ FT MSL SNOW LEVELS FROM MONDAY NIGHT THROUGH WEDNESDAY. HAVE
TRIED TO MEET THE MODELS IN THE MIDDLE WITH POPS FOR THIS TIME
PERIOD.

NEXT COLD FRONT IS EXPECTED TO MOVE IN WEDNESDAY EVENING...WITH
SHOWERS AHEAD OF THIS FRONTAL SYSTEM ON WEDNESDAY DURING THE DAY.
RIGHT NOW WILL ONLY LOWER SNOW LEVELS DOWN TO ABOUT 4000 FT MSL ON
WEDNESDAY NIGHT INTO THURSDAY MORNING...AS THE COLDEST AIR WILL BE
IN ON THURSDAY AFTERNOON.  ALTHOUGH THE CURRENT FORECAST DISCUSSION
WILL ONLY GO OUT THROUGH THURSDAY...IT APPEARS THIS WILL BE ANOTHER
FAST MOVING COLD FRONT WITH WARM AIR RETURNING NEXT WEEKEND. WEBER

&&

.AVIATION...06Z TAFS...UPDATE...WITH THE EXCEPTION OF KDLS...AND
KYKM...ALL TAF SITES ARE EXPECTED TO CONTINUE WITH VFR CONDITIONS
THROUGH06Z/12...WITH MVFR/IFR CONDITIONS POSSIBLE AFTER 06Z/12.
THESE TWO TAF SITES HAVE THE BEST CHANCES FOR RAIN FROM 18Z ONWARD.
CLOUDS WILL CONTINUE TO THICKEN FROM 10K-18K FT CIGS LOWERING TO 5K-
10K THIS MORNING. WINDS WILL BE 10 KTS OR LESS THROUGH THE PERIOD.
WEBER

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  49  40  52  39 /  10  20  40  50
ALW  49  43  53  42 /  10  20  40  50
PSC  50  37  52  36 /  10  20  40  30
YKM  48  37  49  36 /  30  40  30  30
HRI  52  39  53  38 /  10  20  40  40
ELN  41  32  45  31 /  40  50  40  30
RDM  57  37  57  36 /  10  20  30  30
LGD  48  38  51  37 /  10  20  20  40
GCD  54  36  55  35 /  10  20  10  40
DLS  53  41  54  40 /  30  30  40  30

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR ORZ041-044-
     050-505-507-508-510.

WA...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR WAZ024-
     026>029-520-521.

&&

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

$$

88/89/89





000
FXUS66 KPDT 110535 AAA
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
935 PM PST WED FEB 10 2016

UPDATED AVIATION DISCUSSION

.UPDATE...ANOTHER TRANQUIL WEATHER NIGHT IS IN STORE. FORECAST ON
TRACK AND ONLY MINOR UPDATES WERE MADE. PRECIPITATION HAS BEEN
REMOVED FOR THIS EVENING...AS DOPPLER RADAR IS SHOWING NO RETURNS
AT THIS TIME. HOWEVER...A CHANCE OF RAIN FOR THE EAST SLOPES OF
THE CASCADES AND A SLIGHT CHANCE OVER THE NORTHERN BLUE MOUNTAINS
REMAIN AFTER MIDNIGHT. DOPPLER RADARS AT PORTLAND AND SEATTLE ARE
SHOWING RAIN MAKING ITS WAY ONSHORE. OVERNIGHT TEMPERATURES IN
THE UPPER 20S TO UPPER 30S LOOK REASONABLE...BUT I DECREASED
TEMPERATURES IN SOME OF THE HIGHER MOUNTAIN LOCATIONS AS THE LOW
LEVEL INVERSION IS WEAKENING AND THE RIDGETOPS ARE COOLER THAN
THIS TIME LAST NIGHT...MAINLY IN THE WALLOWA MOUNTAINS. WISTER

&&

.AVIATION...06Z TAFS. WITH THE EXCEPTION OF KYKM...ALL TAF SITES ARE
EXPECTED TO CONTINUE WITH VFR CONDITIONS THROUGH 06Z/12TH.  CLOUDS
WILL THICKEN OVERNIGHT FROM 10K-18K FT CIGS LOWERING TO 5K-10K EARLY
THURS MORNING. THERE WILL BE LIGHT RAIN THURS IN THE VCNTY OF
KDLS...AND LIGHT RAIN AT KYKM WILL LOWER CIGS/VSBYS TO MVFR OR LESS
AFTER 20Z. WINDS WILL BE 10 KTS OR LESS THROUGH THE PERIOD.  WISTER

&&



.PREV DISCUSSION... /ISSUED 348 PM PST WED FEB 10 2016/

SHORT TERM...TONIGHT THROUGH FRIDAY NIGHT...WEATHER CONDITIONS
THROUGH THIS PERIOD WILL BE UNSETTLED. AN UPPER RIDGE WILL REMAIN
OVER THE WESTERN U.S. THROUGH THURSDAY NIGHT. WEAK SYSTEMS WILL MOVE
INTO AND THROUGH THE RIDGE RESULTING IN VARYING CHANCES OF LIGHT
PRECIP. SNOW LEVELS WILL REMAIN HIGH, GENERALLY ABOVE 6000 FT MSL,
THROUGH THURSDAY NIGHT. THUS WILL ONLY SEE LIGHT SNOW ACCUMULATIONS
AT THE HIGHEST ELEVATIONS. FOG WILL BE LIMITED DUE TO THE VARYING
AMOUNTS OF CLOUD COVER AND SOME COOLING ALOFT TO WEAKEN THE LOW
LEVEL INVERSIONS. WILL ONLY MENTION FOG IN THE KITTITAS AND WALLOWA
VALLEYS LATE TONIGHT INTO THURSDAY MORNING. TEMPS WILL BE NEAR OR
SLIGHTLY BELOW 32 DEGREES IN THE KITTITAS VALLEY THURSDAY MORNING.
THUS THERE IS AN OUTSIDE CHANCE OF SOME LIGHT FREEZING RAIN. BREEZY
TO WINDY CONDITIONS WINDS WILL CONTINUE IN THE GRANDE RONDE VALLEY,
ESPECIALLY THE SOUTH END. ELSEWHERE WINDS WILL BE 15 MPH OR LESS.
WILL CONTINUE THE AIR STAGNATION ADVISORY AT THE LOWER ELEVATION
AREAS THROUGH AT LEAST FRIDAY, THOUGH THE INVERSIONS WILL BE
WEAKENING. A FRONTAL SYSTEM WILL MOVE THROUGH THE AREA FRIDAY
BRINGING CHANCES OF PRECIP TO MOST LOCATIONS. SNOW LEVELS WILL LOWER
BEHIND THE FRONT LATE FRIDAY AND FRIDAY NIGHT. MAY SEE SOME LIGHT
ACCUMULATIONS DOWN TO AROUND 4000 FT MSL LATE FRIDAY NIGHT. 90

LONG TERM...SATURDAY THROUGH WEDNESDAY...SATURDAY A WEAK SYSTEM
WILL MOVE THROUGH THE AREA WITH A CHANCE OF RAIN AND SNOW IN THE
MOUNTAINS AS SNOW LEVELS DROP TO AROUND 4000 FEET. SNOW AMOUNTS WILL
BE AN INCH OR TWO. THE LOWER ELEVATIONS SHOULD BE MOSTLY DRY ASIDE
FROM A SLIGHT CHANCE OF RAIN SHOWERS IN THE BLUE MOUNTAIN FOOTHILLS
AND PERHAPS THE YAKIMA AND KITTITAS VALLEYS. IN THE COLUMBIA BASIN
WINDS WILL PICK UP TO 10 TO 20 MPH IN THE AFTERNOON. SATURDAY NIGHT
AND SUNDAY ANOTHER STRONGER SYSTEM WILL MOVE THROUGH THE AREA WITH A
CHANCE OF RAIN ACROSS THE AREA. SNOW LEVELS WILL RISE TO 7000 FEET
BY SUNDAY SO MOST OF THE MOUNTAINS WILL JUST SEE RAIN. MODELS SHOW A
WARM FRONT LIFTING THROUGH THE AREA SUNDAY NIGHT WITH A CHANCE OF
RAIN IN THE MOUNTAINS AND A SLIGHT CHANCE IN THE LOWER ELEVATIONS.
AS THE FRONT MOVES NORTH A RIDGE WILL MOVE OVER THE AREA WITH DRYING
CONDITIONS AND VERY WARM TEMPERATURES ON MONDAY. THE RIDGE WILL PUSH
OFF TO THE EAST TUESDAY AS AN UPPER LOW AND TROUGH APPROACHES THE
WEST COAST. MODELS THEN BRING A FRONT INTO THE AREA LATE TUESDAY
NIGHT AND WEDNESDAY WITH A CHANCE OF MAINLY RAIN. SNOW LEVELS WILL
DROP TO 5500 FEET ON WEDNESDAY. TEMPERATURES WILL START OUT IN THE
UPPER 40S TO MID 50S WITH 40S IN THE MOUNTAINS SATURDAY AND SUNDAY.
MONDAY WILL SEE HIGH TEMPERATURES RISE TO THE LOWER TO MID 60S WITH
UPPER 40S AND 50S IN THE MOUNTAINS. TEMPERATURES WILL THEN COOL A
FEW DEGREES EACH DAY ON TUESDAY AND WEDNESDAY. PERRY


&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  36  53  40  52 /   0  10  20  40
ALW  39  53  43  53 /   0  10  20  40
PSC  35  51  37  52 /   0  10  20  40
YKM  35  49  37  49 /  10  20  40  30
HRI  35  53  39  53 /   0  10  20  40
ELN  30  42  32  45 /  10  40  50  40
RDM  35  58  37  57 /  10  10  20  30
LGD  35  49  38  51 /  10  10  20  20
GCD  32  55  36  55 /   0  10  20  10
DLS  40  54  41  54 /  10  30  30  40

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR ORZ041-044-
     050-505-507-508-510.

WA...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR WAZ024-
     026>029-520-521.

&&

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

$$

85





000
FXUS66 KPDT 110535 AAA
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
935 PM PST WED FEB 10 2016

UPDATED AVIATION DISCUSSION

.UPDATE...ANOTHER TRANQUIL WEATHER NIGHT IS IN STORE. FORECAST ON
TRACK AND ONLY MINOR UPDATES WERE MADE. PRECIPITATION HAS BEEN
REMOVED FOR THIS EVENING...AS DOPPLER RADAR IS SHOWING NO RETURNS
AT THIS TIME. HOWEVER...A CHANCE OF RAIN FOR THE EAST SLOPES OF
THE CASCADES AND A SLIGHT CHANCE OVER THE NORTHERN BLUE MOUNTAINS
REMAIN AFTER MIDNIGHT. DOPPLER RADARS AT PORTLAND AND SEATTLE ARE
SHOWING RAIN MAKING ITS WAY ONSHORE. OVERNIGHT TEMPERATURES IN
THE UPPER 20S TO UPPER 30S LOOK REASONABLE...BUT I DECREASED
TEMPERATURES IN SOME OF THE HIGHER MOUNTAIN LOCATIONS AS THE LOW
LEVEL INVERSION IS WEAKENING AND THE RIDGETOPS ARE COOLER THAN
THIS TIME LAST NIGHT...MAINLY IN THE WALLOWA MOUNTAINS. WISTER

&&

.AVIATION...06Z TAFS. WITH THE EXCEPTION OF KYKM...ALL TAF SITES ARE
EXPECTED TO CONTINUE WITH VFR CONDITIONS THROUGH 06Z/12TH.  CLOUDS
WILL THICKEN OVERNIGHT FROM 10K-18K FT CIGS LOWERING TO 5K-10K EARLY
THURS MORNING. THERE WILL BE LIGHT RAIN THURS IN THE VCNTY OF
KDLS...AND LIGHT RAIN AT KYKM WILL LOWER CIGS/VSBYS TO MVFR OR LESS
AFTER 20Z. WINDS WILL BE 10 KTS OR LESS THROUGH THE PERIOD.  WISTER

&&



.PREV DISCUSSION... /ISSUED 348 PM PST WED FEB 10 2016/

SHORT TERM...TONIGHT THROUGH FRIDAY NIGHT...WEATHER CONDITIONS
THROUGH THIS PERIOD WILL BE UNSETTLED. AN UPPER RIDGE WILL REMAIN
OVER THE WESTERN U.S. THROUGH THURSDAY NIGHT. WEAK SYSTEMS WILL MOVE
INTO AND THROUGH THE RIDGE RESULTING IN VARYING CHANCES OF LIGHT
PRECIP. SNOW LEVELS WILL REMAIN HIGH, GENERALLY ABOVE 6000 FT MSL,
THROUGH THURSDAY NIGHT. THUS WILL ONLY SEE LIGHT SNOW ACCUMULATIONS
AT THE HIGHEST ELEVATIONS. FOG WILL BE LIMITED DUE TO THE VARYING
AMOUNTS OF CLOUD COVER AND SOME COOLING ALOFT TO WEAKEN THE LOW
LEVEL INVERSIONS. WILL ONLY MENTION FOG IN THE KITTITAS AND WALLOWA
VALLEYS LATE TONIGHT INTO THURSDAY MORNING. TEMPS WILL BE NEAR OR
SLIGHTLY BELOW 32 DEGREES IN THE KITTITAS VALLEY THURSDAY MORNING.
THUS THERE IS AN OUTSIDE CHANCE OF SOME LIGHT FREEZING RAIN. BREEZY
TO WINDY CONDITIONS WINDS WILL CONTINUE IN THE GRANDE RONDE VALLEY,
ESPECIALLY THE SOUTH END. ELSEWHERE WINDS WILL BE 15 MPH OR LESS.
WILL CONTINUE THE AIR STAGNATION ADVISORY AT THE LOWER ELEVATION
AREAS THROUGH AT LEAST FRIDAY, THOUGH THE INVERSIONS WILL BE
WEAKENING. A FRONTAL SYSTEM WILL MOVE THROUGH THE AREA FRIDAY
BRINGING CHANCES OF PRECIP TO MOST LOCATIONS. SNOW LEVELS WILL LOWER
BEHIND THE FRONT LATE FRIDAY AND FRIDAY NIGHT. MAY SEE SOME LIGHT
ACCUMULATIONS DOWN TO AROUND 4000 FT MSL LATE FRIDAY NIGHT. 90

LONG TERM...SATURDAY THROUGH WEDNESDAY...SATURDAY A WEAK SYSTEM
WILL MOVE THROUGH THE AREA WITH A CHANCE OF RAIN AND SNOW IN THE
MOUNTAINS AS SNOW LEVELS DROP TO AROUND 4000 FEET. SNOW AMOUNTS WILL
BE AN INCH OR TWO. THE LOWER ELEVATIONS SHOULD BE MOSTLY DRY ASIDE
FROM A SLIGHT CHANCE OF RAIN SHOWERS IN THE BLUE MOUNTAIN FOOTHILLS
AND PERHAPS THE YAKIMA AND KITTITAS VALLEYS. IN THE COLUMBIA BASIN
WINDS WILL PICK UP TO 10 TO 20 MPH IN THE AFTERNOON. SATURDAY NIGHT
AND SUNDAY ANOTHER STRONGER SYSTEM WILL MOVE THROUGH THE AREA WITH A
CHANCE OF RAIN ACROSS THE AREA. SNOW LEVELS WILL RISE TO 7000 FEET
BY SUNDAY SO MOST OF THE MOUNTAINS WILL JUST SEE RAIN. MODELS SHOW A
WARM FRONT LIFTING THROUGH THE AREA SUNDAY NIGHT WITH A CHANCE OF
RAIN IN THE MOUNTAINS AND A SLIGHT CHANCE IN THE LOWER ELEVATIONS.
AS THE FRONT MOVES NORTH A RIDGE WILL MOVE OVER THE AREA WITH DRYING
CONDITIONS AND VERY WARM TEMPERATURES ON MONDAY. THE RIDGE WILL PUSH
OFF TO THE EAST TUESDAY AS AN UPPER LOW AND TROUGH APPROACHES THE
WEST COAST. MODELS THEN BRING A FRONT INTO THE AREA LATE TUESDAY
NIGHT AND WEDNESDAY WITH A CHANCE OF MAINLY RAIN. SNOW LEVELS WILL
DROP TO 5500 FEET ON WEDNESDAY. TEMPERATURES WILL START OUT IN THE
UPPER 40S TO MID 50S WITH 40S IN THE MOUNTAINS SATURDAY AND SUNDAY.
MONDAY WILL SEE HIGH TEMPERATURES RISE TO THE LOWER TO MID 60S WITH
UPPER 40S AND 50S IN THE MOUNTAINS. TEMPERATURES WILL THEN COOL A
FEW DEGREES EACH DAY ON TUESDAY AND WEDNESDAY. PERRY


&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  36  53  40  52 /   0  10  20  40
ALW  39  53  43  53 /   0  10  20  40
PSC  35  51  37  52 /   0  10  20  40
YKM  35  49  37  49 /  10  20  40  30
HRI  35  53  39  53 /   0  10  20  40
ELN  30  42  32  45 /  10  40  50  40
RDM  35  58  37  57 /  10  10  20  30
LGD  35  49  38  51 /  10  10  20  20
GCD  32  55  36  55 /   0  10  20  10
DLS  40  54  41  54 /  10  30  30  40

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR ORZ041-044-
     050-505-507-508-510.

WA...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR WAZ024-
     026>029-520-521.

&&

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

$$

85





000
FXUS66 KPDT 110535 AAA
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
935 PM PST WED FEB 10 2016

UPDATED AVIATION DISCUSSION

.UPDATE...ANOTHER TRANQUIL WEATHER NIGHT IS IN STORE. FORECAST ON
TRACK AND ONLY MINOR UPDATES WERE MADE. PRECIPITATION HAS BEEN
REMOVED FOR THIS EVENING...AS DOPPLER RADAR IS SHOWING NO RETURNS
AT THIS TIME. HOWEVER...A CHANCE OF RAIN FOR THE EAST SLOPES OF
THE CASCADES AND A SLIGHT CHANCE OVER THE NORTHERN BLUE MOUNTAINS
REMAIN AFTER MIDNIGHT. DOPPLER RADARS AT PORTLAND AND SEATTLE ARE
SHOWING RAIN MAKING ITS WAY ONSHORE. OVERNIGHT TEMPERATURES IN
THE UPPER 20S TO UPPER 30S LOOK REASONABLE...BUT I DECREASED
TEMPERATURES IN SOME OF THE HIGHER MOUNTAIN LOCATIONS AS THE LOW
LEVEL INVERSION IS WEAKENING AND THE RIDGETOPS ARE COOLER THAN
THIS TIME LAST NIGHT...MAINLY IN THE WALLOWA MOUNTAINS. WISTER

&&

.AVIATION...06Z TAFS. WITH THE EXCEPTION OF KYKM...ALL TAF SITES ARE
EXPECTED TO CONTINUE WITH VFR CONDITIONS THROUGH 06Z/12TH.  CLOUDS
WILL THICKEN OVERNIGHT FROM 10K-18K FT CIGS LOWERING TO 5K-10K EARLY
THURS MORNING. THERE WILL BE LIGHT RAIN THURS IN THE VCNTY OF
KDLS...AND LIGHT RAIN AT KYKM WILL LOWER CIGS/VSBYS TO MVFR OR LESS
AFTER 20Z. WINDS WILL BE 10 KTS OR LESS THROUGH THE PERIOD.  WISTER

&&



.PREV DISCUSSION... /ISSUED 348 PM PST WED FEB 10 2016/

SHORT TERM...TONIGHT THROUGH FRIDAY NIGHT...WEATHER CONDITIONS
THROUGH THIS PERIOD WILL BE UNSETTLED. AN UPPER RIDGE WILL REMAIN
OVER THE WESTERN U.S. THROUGH THURSDAY NIGHT. WEAK SYSTEMS WILL MOVE
INTO AND THROUGH THE RIDGE RESULTING IN VARYING CHANCES OF LIGHT
PRECIP. SNOW LEVELS WILL REMAIN HIGH, GENERALLY ABOVE 6000 FT MSL,
THROUGH THURSDAY NIGHT. THUS WILL ONLY SEE LIGHT SNOW ACCUMULATIONS
AT THE HIGHEST ELEVATIONS. FOG WILL BE LIMITED DUE TO THE VARYING
AMOUNTS OF CLOUD COVER AND SOME COOLING ALOFT TO WEAKEN THE LOW
LEVEL INVERSIONS. WILL ONLY MENTION FOG IN THE KITTITAS AND WALLOWA
VALLEYS LATE TONIGHT INTO THURSDAY MORNING. TEMPS WILL BE NEAR OR
SLIGHTLY BELOW 32 DEGREES IN THE KITTITAS VALLEY THURSDAY MORNING.
THUS THERE IS AN OUTSIDE CHANCE OF SOME LIGHT FREEZING RAIN. BREEZY
TO WINDY CONDITIONS WINDS WILL CONTINUE IN THE GRANDE RONDE VALLEY,
ESPECIALLY THE SOUTH END. ELSEWHERE WINDS WILL BE 15 MPH OR LESS.
WILL CONTINUE THE AIR STAGNATION ADVISORY AT THE LOWER ELEVATION
AREAS THROUGH AT LEAST FRIDAY, THOUGH THE INVERSIONS WILL BE
WEAKENING. A FRONTAL SYSTEM WILL MOVE THROUGH THE AREA FRIDAY
BRINGING CHANCES OF PRECIP TO MOST LOCATIONS. SNOW LEVELS WILL LOWER
BEHIND THE FRONT LATE FRIDAY AND FRIDAY NIGHT. MAY SEE SOME LIGHT
ACCUMULATIONS DOWN TO AROUND 4000 FT MSL LATE FRIDAY NIGHT. 90

LONG TERM...SATURDAY THROUGH WEDNESDAY...SATURDAY A WEAK SYSTEM
WILL MOVE THROUGH THE AREA WITH A CHANCE OF RAIN AND SNOW IN THE
MOUNTAINS AS SNOW LEVELS DROP TO AROUND 4000 FEET. SNOW AMOUNTS WILL
BE AN INCH OR TWO. THE LOWER ELEVATIONS SHOULD BE MOSTLY DRY ASIDE
FROM A SLIGHT CHANCE OF RAIN SHOWERS IN THE BLUE MOUNTAIN FOOTHILLS
AND PERHAPS THE YAKIMA AND KITTITAS VALLEYS. IN THE COLUMBIA BASIN
WINDS WILL PICK UP TO 10 TO 20 MPH IN THE AFTERNOON. SATURDAY NIGHT
AND SUNDAY ANOTHER STRONGER SYSTEM WILL MOVE THROUGH THE AREA WITH A
CHANCE OF RAIN ACROSS THE AREA. SNOW LEVELS WILL RISE TO 7000 FEET
BY SUNDAY SO MOST OF THE MOUNTAINS WILL JUST SEE RAIN. MODELS SHOW A
WARM FRONT LIFTING THROUGH THE AREA SUNDAY NIGHT WITH A CHANCE OF
RAIN IN THE MOUNTAINS AND A SLIGHT CHANCE IN THE LOWER ELEVATIONS.
AS THE FRONT MOVES NORTH A RIDGE WILL MOVE OVER THE AREA WITH DRYING
CONDITIONS AND VERY WARM TEMPERATURES ON MONDAY. THE RIDGE WILL PUSH
OFF TO THE EAST TUESDAY AS AN UPPER LOW AND TROUGH APPROACHES THE
WEST COAST. MODELS THEN BRING A FRONT INTO THE AREA LATE TUESDAY
NIGHT AND WEDNESDAY WITH A CHANCE OF MAINLY RAIN. SNOW LEVELS WILL
DROP TO 5500 FEET ON WEDNESDAY. TEMPERATURES WILL START OUT IN THE
UPPER 40S TO MID 50S WITH 40S IN THE MOUNTAINS SATURDAY AND SUNDAY.
MONDAY WILL SEE HIGH TEMPERATURES RISE TO THE LOWER TO MID 60S WITH
UPPER 40S AND 50S IN THE MOUNTAINS. TEMPERATURES WILL THEN COOL A
FEW DEGREES EACH DAY ON TUESDAY AND WEDNESDAY. PERRY


&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  36  53  40  52 /   0  10  20  40
ALW  39  53  43  53 /   0  10  20  40
PSC  35  51  37  52 /   0  10  20  40
YKM  35  49  37  49 /  10  20  40  30
HRI  35  53  39  53 /   0  10  20  40
ELN  30  42  32  45 /  10  40  50  40
RDM  35  58  37  57 /  10  10  20  30
LGD  35  49  38  51 /  10  10  20  20
GCD  32  55  36  55 /   0  10  20  10
DLS  40  54  41  54 /  10  30  30  40

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR ORZ041-044-
     050-505-507-508-510.

WA...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR WAZ024-
     026>029-520-521.

&&

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

$$

85




000
FXUS66 KPDT 110437
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
837 PM PST WED FEB 10 2016

.UPDATE...ANOTHER TRANQUIL WEATHER NIGHT IS IN STORE. FORECAST ON
TRACK AND ONLY MINOR UPDATES WERE MADE. PRECIPITATION HAS BEEN
REMOVED FOR THIS EVENING...AS DOPPLER RADAR IS SHOWING NO RETURNS
AT THIS TIME. HOWEVER...A CHANCE OF RAIN FOR THE EAST SLOPES OF
THE CASCADES AND A SLIGHT CHANCE OVER THE NORTHERN BLUE MOUNTAINS
REMAIN AFTER MIDNIGHT. DOPPLER RADARS AT PORTLAND AND SEATTLE ARE
SHOWING RAIN MAKING ITS WAY ONSHORE. OVERNIGHT TEMPERATURES IN
THE UPPER 20S TO UPPER 30S LOOK REASONABLE...BUT I DECREASED
TEMPERATURES IN SOME OF THE HIGHER MOUNTAIN LOCATIONS AS THE LOW
LEVEL INVERSION IS WEAKENING AND THE RIDGETOPS ARE COOLER THAN
THIS TIME LAST NIGHT. WISTER


&&



.PREV DISCUSSION... /ISSUED 348 PM PST WED FEB 10 2016/

SHORT TERM...TONIGHT THROUGH FRIDAY NIGHT...WEATHER CONDITIONS
THROUGH THIS PERIOD WILL BE UNSETTLED. AN UPPER RIDGE WILL REMAIN
OVER THE WESTERN U.S. THROUGH THURSDAY NIGHT. WEAK SYSTEMS WILL MOVE
INTO AND THROUGH THE RIDGE RESULTING IN VARYING CHANCES OF LIGHT
PRECIP. SNOW LEVELS WILL REMAIN HIGH, GENERALLY ABOVE 6000 FT MSL,
THROUGH THURSDAY NIGHT. THUS WILL ONLY SEE LIGHT SNOW ACCUMULATIONS
AT THE HIGHEST ELEVATIONS. FOG WILL BE LIMITED DUE TO THE VARYING
AMOUNTS OF CLOUD COVER AND SOME COOLING ALOFT TO WEAKEN THE LOW
LEVEL INVERSIONS. WILL ONLY MENTION FOG IN THE KITTITAS AND WALLOWA
VALLEYS LATE TONIGHT INTO THURSDAY MORNING. TEMPS WILL BE NEAR OR
SLIGHTLY BELOW 32 DEGREES IN THE KITTITAS VALLEY THURSDAY MORNING.
THUS THERE IS AN OUTSIDE CHANCE OF SOME LIGHT FREEZING RAIN. BREEZY
TO WINDY CONDITIONS WINDS WILL CONTINUE IN THE GRANDE RONDE VALLEY,
ESPECIALLY THE SOUTH END. ELSEWHERE WINDS WILL BE 15 MPH OR LESS.
WILL CONTINUE THE AIR STAGNATION ADVISORY AT THE LOWER ELEVATION
AREAS THROUGH AT LEAST FRIDAY, THOUGH THE INVERSIONS WILL BE
WEAKENING. A FRONTAL SYSTEM WILL MOVE THROUGH THE AREA FRIDAY
BRINGING CHANCES OF PRECIP TO MOST LOCATIONS. SNOW LEVELS WILL LOWER
BEHIND THE FRONT LATE FRIDAY AND FRIDAY NIGHT. MAY SEE SOME LIGHT
ACCUMULATIONS DOWN TO AROUND 4000 FT MSL LATE FRIDAY NIGHT. 90

LONG TERM...SATURDAY THROUGH WEDNESDAY...SATURDAY A WEAK SYSTEM
WILL MOVE THROUGH THE AREA WITH A CHANCE OF RAIN AND SNOW IN THE
MOUNTAINS AS SNOW LEVELS DROP TO AROUND 4000 FEET. SNOW AMOUNTS WILL
BE AN INCH OR TWO. THE LOWER ELEVATIONS SHOULD BE MOSTLY DRY ASIDE
FROM A SLIGHT CHANCE OF RAIN SHOWERS IN THE BLUE MOUNTAIN FOOTHILLS
AND PERHAPS THE YAKIMA AND KITTITAS VALLEYS. IN THE COLUMBIA BASIN
WINDS WILL PICK UP TO 10 TO 20 MPH IN THE AFTERNOON. SATURDAY NIGHT
AND SUNDAY ANOTHER STRONGER SYSTEM WILL MOVE THROUGH THE AREA WITH A
CHANCE OF RAIN ACROSS THE AREA. SNOW LEVELS WILL RISE TO 7000 FEET
BY SUNDAY SO MOST OF THE MOUNTAINS WILL JUST SEE RAIN. MODELS SHOW A
WARM FRONT LIFTING THROUGH THE AREA SUNDAY NIGHT WITH A CHANCE OF
RAIN IN THE MOUNTAINS AND A SLIGHT CHANCE IN THE LOWER ELEVATIONS.
AS THE FRONT MOVES NORTH A RIDGE WILL MOVE OVER THE AREA WITH DRYING
CONDITIONS AND VERY WARM TEMPERATURES ON MONDAY. THE RIDGE WILL PUSH
OFF TO THE EAST TUESDAY AS AN UPPER LOW AND TROUGH APPROACHES THE
WEST COAST. MODELS THEN BRING A FRONT INTO THE AREA LATE TUESDAY
NIGHT AND WEDNESDAY WITH A CHANCE OF MAINLY RAIN. SNOW LEVELS WILL
DROP TO 5500 FEET ON WEDNESDAY. TEMPERATURES WILL START OUT IN THE
UPPER 40S TO MID 50S WITH 40S IN THE MOUNTAINS SATURDAY AND SUNDAY.
MONDAY WILL SEE HIGH TEMPERATURES RISE TO THE LOWER TO MID 60S WITH
UPPER 40S AND 50S IN THE MOUNTAINS. TEMPERATURES WILL THEN COOL A
FEW DEGREES EACH DAY ON TUESDAY AND WEDNESDAY. PERRY

AVIATION...00Z TAFS...VFR CONDITIONS WILL BE PREVALENT OVER THE
NEXT 24 HOURS. A WEAK DISTURBANCE WILL BE MOVING ACROSS THE AREA
TONIGHT AND TOMORROW. THERE WILL BE INCREASING MID AND UPPER LEVEL
CLOUDS THIS EVENING BECOMING OVERCAST AT 5000-10000 FEET AGL TONIGHT
AND TOMORROW. PRECIPITATION WILL BE CONFINED MAINLY TO THE CASCADES
TONIGHT THEN SLOWLY MOVE EAST TOMORROW WITH RAIN REACHING KDLS AND
KYKM AFTER 16Z. RAIN WILL HOLD OFF AT OTHER TAF SITES UNTIL AFTER
00Z. WITH THE SYSTEM OVER THE AREA, THE CHANCES FOR FOG TONIGHT LOOK
TO BE LESS THAN THE LAST COUPLE OF NIGHTS, SO HAVE CONFINED MVFR
VISIBILITY TO KDLS AFTER 09Z WITH CLEARING AFTER 18Z. WINDS WILL
REMAIN BELOW 12 KTS FOR THE NEXT 24 HOURS. PERRY

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  36  53  40  52 /   0  10  20  40
ALW  39  53  43  53 /   0  10  20  40
PSC  35  51  37  52 /   0  10  20  40
YKM  35  49  37  49 /  10  20  40  30
HRI  35  53  39  53 /   0  10  20  40
ELN  30  42  32  45 /  10  40  50  40
RDM  35  58  37  57 /  10  10  20  30
LGD  35  49  38  51 /  10  10  20  20
GCD  32  55  36  55 /   0  10  20  10
DLS  40  54  41  54 /  10  30  30  40

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR ORZ041-044-
     050-505-507-508-510.

WA...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR WAZ024-
     026>029-520-521.

&&

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

$$

85





000
FXUS66 KPDT 102348 AAA
AFDPDT

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE PENDLETON OR
348 PM PST WED FEB 10 2016

UPDATED AVIATION DISCUSSION

.SHORT TERM...TONIGHT THROUGH FRIDAY NIGHT...WEATHER CONDITIONS
THROUGH THIS PERIOD WILL BE UNSETTLED. AN UPPER RIDGE WILL REMAIN
OVER THE WESTERN U.S. THROUGH THURSDAY NIGHT. WEAK SYSTEMS WILL MOVE
INTO AND THROUGH THE RIDGE RESULTING IN VARYING CHANCES OF LIGHT
PRECIP. SNOW LEVELS WILL REMAIN HIGH, GENERALLY ABOVE 6000 FT MSL,
THROUGH THURSDAY NIGHT. THUS WILL ONLY SEE LIGHT SNOW ACCUMULATIONS
AT THE HIGHEST ELEVATIONS. FOG WILL BE LIMITED DUE TO THE VARYING
AMOUNTS OF CLOUD COVER AND SOME COOLING ALOFT TO WEAKEN THE LOW
LEVEL INVERSIONS. WILL ONLY MENTION FOG IN THE KITTITAS AND WALLOWA
VALLEYS LATE TONIGHT INTO THURSDAY MORNING. TEMPS WILL BE NEAR OR
SLIGHTLY BELOW 32 DEGREES IN THE KITTITAS VALLEY THURSDAY MORNING.
THUS THERE IS AN OUTSIDE CHANCE OF SOME LIGHT FREEZING RAIN. BREEZY
TO WINDY CONDITIONS WINDS WILL CONTINUE IN THE GRANDE RONDE VALLEY,
ESPECIALLY THE SOUTH END. ELSEWHERE WINDS WILL BE 15 MPH OR LESS.
WILL CONTINUE THE AIR STAGNATION ADVISORY AT THE LOWER ELEVATION
AREAS THROUGH AT LEAST FRIDAY, THOUGH THE INVERSIONS WILL BE
WEAKENING. A FRONTAL SYSTEM WILL MOVE THROUGH THE AREA FRIDAY
BRINGING CHANCES OF PRECIP TO MOST LOCATIONS. SNOW LEVELS WILL LOWER
BEHIND THE FRONT LATE FRIDAY AND FRIDAY NIGHT. MAY SEE SOME LIGHT
ACCUMULATIONS DOWN TO AROUND 4000 FT MSL LATE FRIDAY NIGHT. 90

.LONG TERM...SATURDAY THROUGH WEDNESDAY...SATURDAY A WEAK SYSTEM
WILL MOVE THROUGH THE AREA WITH A CHANCE OF RAIN AND SNOW IN THE
MOUNTAINS AS SNOW LEVELS DROP TO AROUND 4000 FEET. SNOW AMOUNTS WILL
BE AN INCH OR TWO. THE LOWER ELEVATIONS SHOULD BE MOSTLY DRY ASIDE
FROM A SLIGHT CHANCE OF RAIN SHOWERS IN THE BLUE MOUNTAIN FOOTHILLS
AND PERHAPS THE YAKIMA AND KITTITAS VALLEYS. IN THE COLUMBIA BASIN
WINDS WILL PICK UP TO 10 TO 20 MPH IN THE AFTERNOON. SATURDAY NIGHT
AND SUNDAY ANOTHER STRONGER SYSTEM WILL MOVE THROUGH THE AREA WITH A
CHANCE OF RAIN ACROSS THE AREA. SNOW LEVELS WILL RISE TO 7000 FEET
BY SUNDAY SO MOST OF THE MOUNTAINS WILL JUST SEE RAIN. MODELS SHOW A
WARM FRONT LIFTING THROUGH THE AREA SUNDAY NIGHT WITH A CHANCE OF
RAIN IN THE MOUNTAINS AND A SLIGHT CHANCE IN THE LOWER ELEVATIONS.
AS THE FRONT MOVES NORTH A RIDGE WILL MOVE OVER THE AREA WITH DRYING
CONDITIONS AND VERY WARM TEMPERATURES ON MONDAY. THE RIDGE WILL PUSH
OFF TO THE EAST TUESDAY AS AN UPPER LOW AND TROUGH APPROACHES THE
WEST COAST. MODELS THEN BRING A FRONT INTO THE AREA LATE TUESDAY
NIGHT AND WEDNESDAY WITH A CHANCE OF MAINLY RAIN. SNOW LEVELS WILL
DROP TO 5500 FEET ON WEDNESDAY. TEMPERATURES WILL START OUT IN THE
UPPER 40S TO MID 50S WITH 40S IN THE MOUNTAINS SATURDAY AND SUNDAY.
MONDAY WILL SEE HIGH TEMPERATURES RISE TO THE LOWER TO MID 60S WITH
UPPER 40S AND 50S IN THE MOUNTAINS. TEMPERATURES WILL THEN COOL A
FEW DEGREES EACH DAY ON TUESDAY AND WEDNESDAY. PERRY

&&

.AVIATION...00Z TAFS...VFR CONDITIONS WILL BE PREVALENT OVER THE
NEXT 24 HOURS. A WEAK DISTURBANCE WILL BE MOVING ACROSS THE AREA
TONIGHT AND TOMORROW. THERE WILL BE INCREASING MID AND UPPER LEVEL
CLOUDS THIS EVENING BECOMING OVERCAST AT 5000-10000 FEET AGL TONIGHT
AND TOMORROW. PRECIPITATION WILL BE CONFINED MAINLY TO THE CASCADES
TONIGHT THEN SLOWLY MOVE EAST TOMORROW WITH RAIN REACHING KDLS AND
KYKM AFTER 16Z. RAIN WILL HOLD OFF AT OTHER TAF SITES UNTIL AFTER
00Z. WITH THE SYSTEM OVER THE AREA, THE CHANCES FOR FOG TONIGHT LOOK
TO BE LESS THAN THE LAST COUPLE OF NIGHTS, SO HAVE CONFINED MVFR
VISIBILITY TO KDLS AFTER 09Z WITH CLEARING AFTER 18Z. WINDS WILL
REMAIN BELOW 12 KTS FOR THE NEXT 24 HOURS. PERRY

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  36  53  40  52 /   0  10  20  40
ALW  39  53  43  53 /   0  10  20  40
PSC  35  51  37  52 /   0  10  20  40
YKM  35  49  37  49 /  10  20  40  30
HRI  35  53  39  53 /   0  10  20  40
ELN  30  42  32  45 /  10  40  50  40
RDM  35  58  37  57 /  10  10  20  30
LGD  35  49  38  51 /  10  10  20  20
GCD  32  55  36  55 /   0  10  20  10
DLS  40  54  41  54 /  10  30  30  40

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR ORZ041-044-
     050-505-507-508-510.

WA...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR WAZ024-
     026>029-520-521.

&&

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

$$

90/83/83





000
FXUS66 KPDT 102348 AAA
AFDPDT

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE PENDLETON OR
348 PM PST WED FEB 10 2016

UPDATED AVIATION DISCUSSION

.SHORT TERM...TONIGHT THROUGH FRIDAY NIGHT...WEATHER CONDITIONS
THROUGH THIS PERIOD WILL BE UNSETTLED. AN UPPER RIDGE WILL REMAIN
OVER THE WESTERN U.S. THROUGH THURSDAY NIGHT. WEAK SYSTEMS WILL MOVE
INTO AND THROUGH THE RIDGE RESULTING IN VARYING CHANCES OF LIGHT
PRECIP. SNOW LEVELS WILL REMAIN HIGH, GENERALLY ABOVE 6000 FT MSL,
THROUGH THURSDAY NIGHT. THUS WILL ONLY SEE LIGHT SNOW ACCUMULATIONS
AT THE HIGHEST ELEVATIONS. FOG WILL BE LIMITED DUE TO THE VARYING
AMOUNTS OF CLOUD COVER AND SOME COOLING ALOFT TO WEAKEN THE LOW
LEVEL INVERSIONS. WILL ONLY MENTION FOG IN THE KITTITAS AND WALLOWA
VALLEYS LATE TONIGHT INTO THURSDAY MORNING. TEMPS WILL BE NEAR OR
SLIGHTLY BELOW 32 DEGREES IN THE KITTITAS VALLEY THURSDAY MORNING.
THUS THERE IS AN OUTSIDE CHANCE OF SOME LIGHT FREEZING RAIN. BREEZY
TO WINDY CONDITIONS WINDS WILL CONTINUE IN THE GRANDE RONDE VALLEY,
ESPECIALLY THE SOUTH END. ELSEWHERE WINDS WILL BE 15 MPH OR LESS.
WILL CONTINUE THE AIR STAGNATION ADVISORY AT THE LOWER ELEVATION
AREAS THROUGH AT LEAST FRIDAY, THOUGH THE INVERSIONS WILL BE
WEAKENING. A FRONTAL SYSTEM WILL MOVE THROUGH THE AREA FRIDAY
BRINGING CHANCES OF PRECIP TO MOST LOCATIONS. SNOW LEVELS WILL LOWER
BEHIND THE FRONT LATE FRIDAY AND FRIDAY NIGHT. MAY SEE SOME LIGHT
ACCUMULATIONS DOWN TO AROUND 4000 FT MSL LATE FRIDAY NIGHT. 90

.LONG TERM...SATURDAY THROUGH WEDNESDAY...SATURDAY A WEAK SYSTEM
WILL MOVE THROUGH THE AREA WITH A CHANCE OF RAIN AND SNOW IN THE
MOUNTAINS AS SNOW LEVELS DROP TO AROUND 4000 FEET. SNOW AMOUNTS WILL
BE AN INCH OR TWO. THE LOWER ELEVATIONS SHOULD BE MOSTLY DRY ASIDE
FROM A SLIGHT CHANCE OF RAIN SHOWERS IN THE BLUE MOUNTAIN FOOTHILLS
AND PERHAPS THE YAKIMA AND KITTITAS VALLEYS. IN THE COLUMBIA BASIN
WINDS WILL PICK UP TO 10 TO 20 MPH IN THE AFTERNOON. SATURDAY NIGHT
AND SUNDAY ANOTHER STRONGER SYSTEM WILL MOVE THROUGH THE AREA WITH A
CHANCE OF RAIN ACROSS THE AREA. SNOW LEVELS WILL RISE TO 7000 FEET
BY SUNDAY SO MOST OF THE MOUNTAINS WILL JUST SEE RAIN. MODELS SHOW A
WARM FRONT LIFTING THROUGH THE AREA SUNDAY NIGHT WITH A CHANCE OF
RAIN IN THE MOUNTAINS AND A SLIGHT CHANCE IN THE LOWER ELEVATIONS.
AS THE FRONT MOVES NORTH A RIDGE WILL MOVE OVER THE AREA WITH DRYING
CONDITIONS AND VERY WARM TEMPERATURES ON MONDAY. THE RIDGE WILL PUSH
OFF TO THE EAST TUESDAY AS AN UPPER LOW AND TROUGH APPROACHES THE
WEST COAST. MODELS THEN BRING A FRONT INTO THE AREA LATE TUESDAY
NIGHT AND WEDNESDAY WITH A CHANCE OF MAINLY RAIN. SNOW LEVELS WILL
DROP TO 5500 FEET ON WEDNESDAY. TEMPERATURES WILL START OUT IN THE
UPPER 40S TO MID 50S WITH 40S IN THE MOUNTAINS SATURDAY AND SUNDAY.
MONDAY WILL SEE HIGH TEMPERATURES RISE TO THE LOWER TO MID 60S WITH
UPPER 40S AND 50S IN THE MOUNTAINS. TEMPERATURES WILL THEN COOL A
FEW DEGREES EACH DAY ON TUESDAY AND WEDNESDAY. PERRY

&&

.AVIATION...00Z TAFS...VFR CONDITIONS WILL BE PREVALENT OVER THE
NEXT 24 HOURS. A WEAK DISTURBANCE WILL BE MOVING ACROSS THE AREA
TONIGHT AND TOMORROW. THERE WILL BE INCREASING MID AND UPPER LEVEL
CLOUDS THIS EVENING BECOMING OVERCAST AT 5000-10000 FEET AGL TONIGHT
AND TOMORROW. PRECIPITATION WILL BE CONFINED MAINLY TO THE CASCADES
TONIGHT THEN SLOWLY MOVE EAST TOMORROW WITH RAIN REACHING KDLS AND
KYKM AFTER 16Z. RAIN WILL HOLD OFF AT OTHER TAF SITES UNTIL AFTER
00Z. WITH THE SYSTEM OVER THE AREA, THE CHANCES FOR FOG TONIGHT LOOK
TO BE LESS THAN THE LAST COUPLE OF NIGHTS, SO HAVE CONFINED MVFR
VISIBILITY TO KDLS AFTER 09Z WITH CLEARING AFTER 18Z. WINDS WILL
REMAIN BELOW 12 KTS FOR THE NEXT 24 HOURS. PERRY

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  36  53  40  52 /   0  10  20  40
ALW  39  53  43  53 /   0  10  20  40
PSC  35  51  37  52 /   0  10  20  40
YKM  35  49  37  49 /  10  20  40  30
HRI  35  53  39  53 /   0  10  20  40
ELN  30  42  32  45 /  10  40  50  40
RDM  35  58  37  57 /  10  10  20  30
LGD  35  49  38  51 /  10  10  20  20
GCD  32  55  36  55 /   0  10  20  10
DLS  40  54  41  54 /  10  30  30  40

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR ORZ041-044-
     050-505-507-508-510.

WA...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR WAZ024-
     026>029-520-521.

&&

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

$$

90/83/83




000
FXUS66 KPDT 102348 AAA
AFDPDT

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE PENDLETON OR
348 PM PST WED FEB 10 2016

UPDATED AVIATION DISCUSSION

.SHORT TERM...TONIGHT THROUGH FRIDAY NIGHT...WEATHER CONDITIONS
THROUGH THIS PERIOD WILL BE UNSETTLED. AN UPPER RIDGE WILL REMAIN
OVER THE WESTERN U.S. THROUGH THURSDAY NIGHT. WEAK SYSTEMS WILL MOVE
INTO AND THROUGH THE RIDGE RESULTING IN VARYING CHANCES OF LIGHT
PRECIP. SNOW LEVELS WILL REMAIN HIGH, GENERALLY ABOVE 6000 FT MSL,
THROUGH THURSDAY NIGHT. THUS WILL ONLY SEE LIGHT SNOW ACCUMULATIONS
AT THE HIGHEST ELEVATIONS. FOG WILL BE LIMITED DUE TO THE VARYING
AMOUNTS OF CLOUD COVER AND SOME COOLING ALOFT TO WEAKEN THE LOW
LEVEL INVERSIONS. WILL ONLY MENTION FOG IN THE KITTITAS AND WALLOWA
VALLEYS LATE TONIGHT INTO THURSDAY MORNING. TEMPS WILL BE NEAR OR
SLIGHTLY BELOW 32 DEGREES IN THE KITTITAS VALLEY THURSDAY MORNING.
THUS THERE IS AN OUTSIDE CHANCE OF SOME LIGHT FREEZING RAIN. BREEZY
TO WINDY CONDITIONS WINDS WILL CONTINUE IN THE GRANDE RONDE VALLEY,
ESPECIALLY THE SOUTH END. ELSEWHERE WINDS WILL BE 15 MPH OR LESS.
WILL CONTINUE THE AIR STAGNATION ADVISORY AT THE LOWER ELEVATION
AREAS THROUGH AT LEAST FRIDAY, THOUGH THE INVERSIONS WILL BE
WEAKENING. A FRONTAL SYSTEM WILL MOVE THROUGH THE AREA FRIDAY
BRINGING CHANCES OF PRECIP TO MOST LOCATIONS. SNOW LEVELS WILL LOWER
BEHIND THE FRONT LATE FRIDAY AND FRIDAY NIGHT. MAY SEE SOME LIGHT
ACCUMULATIONS DOWN TO AROUND 4000 FT MSL LATE FRIDAY NIGHT. 90

.LONG TERM...SATURDAY THROUGH WEDNESDAY...SATURDAY A WEAK SYSTEM
WILL MOVE THROUGH THE AREA WITH A CHANCE OF RAIN AND SNOW IN THE
MOUNTAINS AS SNOW LEVELS DROP TO AROUND 4000 FEET. SNOW AMOUNTS WILL
BE AN INCH OR TWO. THE LOWER ELEVATIONS SHOULD BE MOSTLY DRY ASIDE
FROM A SLIGHT CHANCE OF RAIN SHOWERS IN THE BLUE MOUNTAIN FOOTHILLS
AND PERHAPS THE YAKIMA AND KITTITAS VALLEYS. IN THE COLUMBIA BASIN
WINDS WILL PICK UP TO 10 TO 20 MPH IN THE AFTERNOON. SATURDAY NIGHT
AND SUNDAY ANOTHER STRONGER SYSTEM WILL MOVE THROUGH THE AREA WITH A
CHANCE OF RAIN ACROSS THE AREA. SNOW LEVELS WILL RISE TO 7000 FEET
BY SUNDAY SO MOST OF THE MOUNTAINS WILL JUST SEE RAIN. MODELS SHOW A
WARM FRONT LIFTING THROUGH THE AREA SUNDAY NIGHT WITH A CHANCE OF
RAIN IN THE MOUNTAINS AND A SLIGHT CHANCE IN THE LOWER ELEVATIONS.
AS THE FRONT MOVES NORTH A RIDGE WILL MOVE OVER THE AREA WITH DRYING
CONDITIONS AND VERY WARM TEMPERATURES ON MONDAY. THE RIDGE WILL PUSH
OFF TO THE EAST TUESDAY AS AN UPPER LOW AND TROUGH APPROACHES THE
WEST COAST. MODELS THEN BRING A FRONT INTO THE AREA LATE TUESDAY
NIGHT AND WEDNESDAY WITH A CHANCE OF MAINLY RAIN. SNOW LEVELS WILL
DROP TO 5500 FEET ON WEDNESDAY. TEMPERATURES WILL START OUT IN THE
UPPER 40S TO MID 50S WITH 40S IN THE MOUNTAINS SATURDAY AND SUNDAY.
MONDAY WILL SEE HIGH TEMPERATURES RISE TO THE LOWER TO MID 60S WITH
UPPER 40S AND 50S IN THE MOUNTAINS. TEMPERATURES WILL THEN COOL A
FEW DEGREES EACH DAY ON TUESDAY AND WEDNESDAY. PERRY

&&

.AVIATION...00Z TAFS...VFR CONDITIONS WILL BE PREVALENT OVER THE
NEXT 24 HOURS. A WEAK DISTURBANCE WILL BE MOVING ACROSS THE AREA
TONIGHT AND TOMORROW. THERE WILL BE INCREASING MID AND UPPER LEVEL
CLOUDS THIS EVENING BECOMING OVERCAST AT 5000-10000 FEET AGL TONIGHT
AND TOMORROW. PRECIPITATION WILL BE CONFINED MAINLY TO THE CASCADES
TONIGHT THEN SLOWLY MOVE EAST TOMORROW WITH RAIN REACHING KDLS AND
KYKM AFTER 16Z. RAIN WILL HOLD OFF AT OTHER TAF SITES UNTIL AFTER
00Z. WITH THE SYSTEM OVER THE AREA, THE CHANCES FOR FOG TONIGHT LOOK
TO BE LESS THAN THE LAST COUPLE OF NIGHTS, SO HAVE CONFINED MVFR
VISIBILITY TO KDLS AFTER 09Z WITH CLEARING AFTER 18Z. WINDS WILL
REMAIN BELOW 12 KTS FOR THE NEXT 24 HOURS. PERRY

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  36  53  40  52 /   0  10  20  40
ALW  39  53  43  53 /   0  10  20  40
PSC  35  51  37  52 /   0  10  20  40
YKM  35  49  37  49 /  10  20  40  30
HRI  35  53  39  53 /   0  10  20  40
ELN  30  42  32  45 /  10  40  50  40
RDM  35  58  37  57 /  10  10  20  30
LGD  35  49  38  51 /  10  10  20  20
GCD  32  55  36  55 /   0  10  20  10
DLS  40  54  41  54 /  10  30  30  40

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR ORZ041-044-
     050-505-507-508-510.

WA...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR WAZ024-
     026>029-520-521.

&&

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

$$

90/83/83





000
FXUS66 KPDT 102245
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
245 PM PST WED FEB 10 2016

.SHORT TERM...TONIGHT THROUGH FRIDAY NIGHT...WEATHER CONDITIONS
THROUGH THIS PERIOD WILL BE UNSETTLED. AN UPPER RIDGE WILL REMAIN
OVER THE WESTERN U.S. THROUGH THURSDAY NIGHT. WEAK SYSTEMS WILL MOVE
INTO AND THROUGH THE RIDGE RESULTING IN VARYING CHANCES OF LIGHT
PRECIP. SNOW LEVELS WILL REMAIN HIGH, GENERALLY ABOVE 6000 FT MSL,
THROUGH THURSDAY NIGHT. THUS WILL ONLY SEE LIGHT SNOW ACCUMULATIONS
AT THE HIGHEST ELEVATIONS. FOG WILL BE LIMITED DUE TO THE VARYING
AMOUNTS OF CLOUD COVER AND SOME COOLING ALOFT TO WEAKEN THE LOW
LEVEL INVERSIONS. WILL ONLY MENTION FOG IN THE KITTITAS AND WALLOWA
VALLEYS LATE TONIGHT INTO THURSDAY MORNING. TEMPS WILL BE NEAR OR
SLIGHTLY BELOW 32 DEGREES IN THE KITTITAS VALLEY THURSDAY MORNING.
THUS THERE IS AN OUTSIDE CHANCE OF SOME LIGHT FREEZING RAIN. BREEZY
TO WINDY CONDITIONS WINDS WILL CONTINUE IN THE GRANDE RONDE VALLEY,
ESPECIALLY THE SOUTH END. ELSEWHERE WINDS WILL BE 15 MPH OR LESS.
WILL CONTINUE THE AIR STAGNATION ADVISORY AT THE LOWER ELEVATION
AREAS THROUGH AT LEAST FRIDAY, THOUGH THE INVERSIONS WILL BE
WEAKENING. A FRONTAL SYSTEM WILL MOVE THROUGH THE AREA FRIDAY
BRINGING CHANCES OF PRECIP TO MOST LOCATIONS. SNOW LEVELS WILL LOWER
BEHIND THE FRONT LATE FRIDAY AND FRIDAY NIGHT. MAY SEE SOME LIGHT
ACCUMULATIONS DOWN TO AROUND 4000 FT MSL LATE FRIDAY NIGHT. 90

.LONG TERM...SATURDAY THROUGH WEDNESDAY...SATURDAY A WEAK SYSTEM
WILL MOVE THROUGH THE AREA WITH A CHANCE OF RAIN AND SNOW IN THE
MOUNTAINS AS SNOW LEVELS DROP TO AROUND 4000 FEET. SNOW AMOUNTS WILL
BE AN INCH OR TWO. THE LOWER ELEVATIONS SHOULD BE MOSTLY DRY ASIDE
FROM A SLIGHT CHANCE OF RAIN SHOWERS IN THE BLUE MOUNTAIN FOOTHILLS
AND PERHAPS THE YAKIMA AND KITTITAS VALLEYS. IN THE COLUMBIA BASIN
WINDS WILL PICK UP TO 10 TO 20 MPH IN THE AFTERNOON. SATURDAY NIGHT
AND SUNDAY ANOTHER STRONGER SYSTEM WILL MOVE THROUGH THE AREA WITH A
CHANCE OF RAIN ACROSS THE AREA. SNOW LEVELS WILL RISE TO 7000 FEET
BY SUNDAY SO MOST OF THE MOUNTAINS WILL JUST SEE RAIN. MODELS SHOW A
WARM FRONT LIFTING THROUGH THE AREA SUNDAY NIGHT WITH A CHANCE OF
RAIN IN THE MOUNTAINS AND A SLIGHT CHANCE IN THE LOWER ELEVATIONS.
AS THE FRONT MOVES NORTH A RIDGE WILL MOVE OVER THE AREA WITH DRYING
CONDITIONS AND VERY WARM TEMPERATURES ON MONDAY. THE RIDGE WILL PUSH
OFF TO THE EAST TUESDAY AS AN UPPER LOW AND TROUGH APPROACHES THE
WEST COAST. MODELS THEN BRING A FRONT INTO THE AREA LATE TUESDAY
NIGHT AND WEDNESDAY WITH A CHANCE OF MAINLY RAIN. SNOW LEVELS WILL
DROP TO 5500 FEET ON WEDNESDAY. TEMPERATURES WILL START OUT IN THE
UPPER 40S TO MID 50S WITH 40S IN THE MOUNTAINS SATURDAY AND SUNDAY.
MONDAY WILL SEE HIGH TEMPERATURES RISE TO THE LOWER TO MID 60S WITH
UPPER 40S AND 50S IN THE MOUNTAINS. TEMPERATURES WILL THEN COOL A
FEW DEGREES EACH DAY ON TUESDAY AND WEDNESDAY. PERRY

&&

.AVIATION...PREVIOUS DISCUSSION...18Z TAFS...VFR CONDITIONS WILL BE
PREVALENT OVER THE NEXT 24 HOURS. LINGERING MVFR VISIBILITIES WILL
BE POSSIBLE AT KPSC FOR THE NEXT HOUR OR TWO. A WEAK DISTURBANCE
WILL BE MOVING ACROSS THE AREA TODAY AND TONIGHT AND THERE WILL BE
INCREASING MID AND UPPER LEVEL CLOUDS TODAY BECOMING OVERCAST AT
5000-10000 FEET AGL TONIGHT. PRECIPITATION WILL BE CONFINED MAINLY
TO THE CASCADES. WITH THE SYSTEM OVER THE AREA THE CHANCES FOR FOG
LOOK TO BE LESS THAN THE LAST COUPLE OF NIGHTS SO HAVE CONFINED MVFR
VISIBILITY TO KDLS AFTER 15Z. WINDS WILL REMAIN BELOW 12 KTS FOR THE
NEXT 24 HOURS. PERRY

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  36  53  40  52 /   0  10  20  40
ALW  39  53  43  53 /   0  10  20  40
PSC  35  51  37  52 /   0  10  20  40
YKM  35  49  37  49 /  10  20  40  30
HRI  35  53  39  53 /   0  10  20  40
ELN  30  42  32  45 /  10  40  50  40
RDM  35  58  37  57 /  10  10  20  30
LGD  35  49  38  51 /  10  10  20  20
GCD  32  55  36  55 /   0  10  20  10
DLS  40  54  41  54 /  10  30  30  40

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR ORZ041-044-
     050-505-507-508-510.

WA...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR WAZ024-
     026>029-520-521.

&&

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

$$

90/83/83





000
FXUS66 KPDT 101751 AAB
AFDPDT

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE PENDLETON OR
951 AM PST WED FEB 10 2016

UPDATED AVIATION DISCUSSION

.SHORT TERM...MORNING UPDATE...THE UPPER RIDGE OVER THE WESTERN U.S.
WILL WEAKEN OVER THE PACIFIC NORTHWEST TODAY AS A WEAK UPPER LEVEL
DISTURBANCE MOVES THROUGH THE REGION. THIS DISTURBANCE WILL BRING
VARIABLE AMOUNTS OF MID AND HIGH LEVEL CLOUDINESS TO THE REGION, BUT
ONLY LIMITED AMOUNTS OF PRECIP. AT THIS TIME, PRECIP IS EXPECTED TO
MAINLY OCCUR NEAR THE CASCADE CREST. THE FORECAST PACKAGE COVERS THE
PRECIP OCCURRENCES WELL AND ONLY MADE MINOR ADJUSTMENTS. FOG HAS
BEEN LIMITED ACROSS THE AREA THIS MORNING, WITH THE BASE OF THE
INVERSION OVER THE COLUMBIA BASIN BEING A BIT LOWER THAN YESTERDAY.
THUS ADJUSTED FOG LOCATIONS ACROSS THE AREA. ALSO, A FEW ADJUSTMENTS
TO SKY COVER AND WINDS WERE MADE FOR THIS UPDATE. 90

.LONG TERM...PREVIOUS DISCUSSION...AS THE COLD FRONT MAKES ITS WAY
ACROSS THE AREA...EXPECT RAIN FRIDAY NIGHT CHANGING OVER TO SNOW
ABOVE 3500 FT MSL BY SATURDAY MORNING. ANY NEW SNOW ACCUMULATIONS
ARE EXPECTED TO BE LIGHT DUE TO THE WET NATURE OF THE
PRECIPITATION...AND THAT SURFACE TEMPERATURES WILL LIKELY STILL BE
WARM AND ABOVE FREEZING DURING THE CHANGE OVER PROCESS. EXPECT
BREEZY TO WINDY CONDITIONS ACROSS THE LOWER ELEVATIONS ON SATURDAY
WITH THE COLD FRONT PASSAGE.

SUNDAY AND MONDAY...THE OVERALL PATTERN WILL STAY IN A PROGRESSIVE
WESTERLY FLOW...BUT SNOW LEVELS WILL BE ON THE RISE FOR THE MOST
PART...REBOUNDING TO ABOUT 7000-8000 FT MSL BY MONDAY AFTERNOON.
MOISTURE BANDS WILL ACCOMPANY THIS PROGRESSIVE FLOW...ALONG WITH MID
AND LOW LEVEL WIND INCREASES. AS A RESULT CERTAIN AREAS...ESPECIALLY
RIDGETOPS MAY BE BREEZY SUNDAY NIGHT INTO MONDAY...WITH FAIRLY
DECENT POP CHANCES THROUGH SUNDAY NIGHT.

HAVE TRANSITIONED TO A MORE CLIMO POP MONDAY THROUGH WEDNESDAY AS
MODEL QPF PLACEMENT VARIES FROM DAY TO DAY. A FEW OTHER MODEL
DISCREPANCIES IN THE EXTENDED AS WELL...REGARDING PRECIPITATION.
WILL WAIT TO SEE WHETHER OR NOT THE DRIER AIR TO THE SOUTH WILL
ATTEMPT TO SHIFT NORTH JUST ENOUGH TO PUSH THE MOISTURE BANDS NORTH
OF OUR FORECAST AREA. THIS WOULD SIGNIFICANTLY REDUCE POPS FOR THE
MONDAY EVENING THROUGH WEDNESDAY TIME PERIOD. ANOTHER DISCREPANCY IN
THE GFS/ECMWF MODEL IS THAT ECMWF HAS A FAST MOVING COLD FRONT...
WHICH RESULTS IN A BRIEF LOWERING OF THE SNOW LEVELS ON MONDAY NIGHT
INTO TUESDAY NIGHT. THIS MODEL SUGGESTS THAT SNOW LEVELS WOULD ONCE
AGAIN DROP TO ABOUT 3500 FT MSL. HAVE NOT GONE THIS ROUTE WITH THE
FORECAST...BUT WILL CONTINUE TO MONITOR THE NEXT MODEL RUNS FOR
CHANGES.

ANOTHER COLD FRONT CAN BE EXPECTED TO IMPACT ALL AREAS NEXT
WEDNESDAY EVENING...STAY UP TO DATE WITH UPCOMING DISCUSSIONS TO SEE
HOW STRONG/WEAK THIS NEXT COLD FRONT IS EXPECTED TO BE.

&&

.AVIATION...18Z TAFS...VFR CONDITIONS WILL BE PREVALENT OVER THE
NEXT 24 HOURS. LINGERING MVFR VISIBILITIES WILL BE POSSIBLE AT KPSC
FOR THE NEXT HOUR OR TWO. A WEAK DISTURBANCE WILL BE MOVING ACROSS
THE AREA TODAY AND TONIGHT AND THERE WILL BE INCREASING MID AND
UPPER LEVEL CLOUDS TODAY BECOMING OVERCAST AT 5000-10000 FEET AGL
TONIGHT. PRECIPITATION WILL BE CONFINED MAINLY TO THE CASCADES. WITH
THE SYSTEM OVER THE AREA THE CHANCES FOR FOG LOOK TO BE LESS THAN
THE LAST COUPLE OF NIGHTS SO HAVE CONFINED MVFR VISIBILITY TO KDLS
AFTER 15Z. WINDS WILL REMAIN BELOW 12 KTS FOR THE NEXT 24 HOURS.
PERRY

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  53  36  54  39 /   0   0  10  10
ALW  51  38  54  41 /   0   0  10  10
PSC  52  35  51  37 /   0   0  10  10
YKM  53  35  49  37 /   0  10  20  20
HRI  52  36  52  38 /   0   0  10  10
ELN  43  31  42  35 /   0  10  20  30
RDM  63  34  59  38 /   0  10  10  10
LGD  47  34  49  37 /   0   0   0  10
GCD  61  31  52  34 /   0   0  10  10
DLS  55  40  54  41 /   0  10  20  20

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR ORZ041-044-
     050-505-507-508-510.

WA...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR WAZ024-
     026>029-520-521.

&&

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

$$

90/89/83





000
FXUS66 KPDT 101751 AAB
AFDPDT

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE PENDLETON OR
951 AM PST WED FEB 10 2016

UPDATED AVIATION DISCUSSION

.SHORT TERM...MORNING UPDATE...THE UPPER RIDGE OVER THE WESTERN U.S.
WILL WEAKEN OVER THE PACIFIC NORTHWEST TODAY AS A WEAK UPPER LEVEL
DISTURBANCE MOVES THROUGH THE REGION. THIS DISTURBANCE WILL BRING
VARIABLE AMOUNTS OF MID AND HIGH LEVEL CLOUDINESS TO THE REGION, BUT
ONLY LIMITED AMOUNTS OF PRECIP. AT THIS TIME, PRECIP IS EXPECTED TO
MAINLY OCCUR NEAR THE CASCADE CREST. THE FORECAST PACKAGE COVERS THE
PRECIP OCCURRENCES WELL AND ONLY MADE MINOR ADJUSTMENTS. FOG HAS
BEEN LIMITED ACROSS THE AREA THIS MORNING, WITH THE BASE OF THE
INVERSION OVER THE COLUMBIA BASIN BEING A BIT LOWER THAN YESTERDAY.
THUS ADJUSTED FOG LOCATIONS ACROSS THE AREA. ALSO, A FEW ADJUSTMENTS
TO SKY COVER AND WINDS WERE MADE FOR THIS UPDATE. 90

.LONG TERM...PREVIOUS DISCUSSION...AS THE COLD FRONT MAKES ITS WAY
ACROSS THE AREA...EXPECT RAIN FRIDAY NIGHT CHANGING OVER TO SNOW
ABOVE 3500 FT MSL BY SATURDAY MORNING. ANY NEW SNOW ACCUMULATIONS
ARE EXPECTED TO BE LIGHT DUE TO THE WET NATURE OF THE
PRECIPITATION...AND THAT SURFACE TEMPERATURES WILL LIKELY STILL BE
WARM AND ABOVE FREEZING DURING THE CHANGE OVER PROCESS. EXPECT
BREEZY TO WINDY CONDITIONS ACROSS THE LOWER ELEVATIONS ON SATURDAY
WITH THE COLD FRONT PASSAGE.

SUNDAY AND MONDAY...THE OVERALL PATTERN WILL STAY IN A PROGRESSIVE
WESTERLY FLOW...BUT SNOW LEVELS WILL BE ON THE RISE FOR THE MOST
PART...REBOUNDING TO ABOUT 7000-8000 FT MSL BY MONDAY AFTERNOON.
MOISTURE BANDS WILL ACCOMPANY THIS PROGRESSIVE FLOW...ALONG WITH MID
AND LOW LEVEL WIND INCREASES. AS A RESULT CERTAIN AREAS...ESPECIALLY
RIDGETOPS MAY BE BREEZY SUNDAY NIGHT INTO MONDAY...WITH FAIRLY
DECENT POP CHANCES THROUGH SUNDAY NIGHT.

HAVE TRANSITIONED TO A MORE CLIMO POP MONDAY THROUGH WEDNESDAY AS
MODEL QPF PLACEMENT VARIES FROM DAY TO DAY. A FEW OTHER MODEL
DISCREPANCIES IN THE EXTENDED AS WELL...REGARDING PRECIPITATION.
WILL WAIT TO SEE WHETHER OR NOT THE DRIER AIR TO THE SOUTH WILL
ATTEMPT TO SHIFT NORTH JUST ENOUGH TO PUSH THE MOISTURE BANDS NORTH
OF OUR FORECAST AREA. THIS WOULD SIGNIFICANTLY REDUCE POPS FOR THE
MONDAY EVENING THROUGH WEDNESDAY TIME PERIOD. ANOTHER DISCREPANCY IN
THE GFS/ECMWF MODEL IS THAT ECMWF HAS A FAST MOVING COLD FRONT...
WHICH RESULTS IN A BRIEF LOWERING OF THE SNOW LEVELS ON MONDAY NIGHT
INTO TUESDAY NIGHT. THIS MODEL SUGGESTS THAT SNOW LEVELS WOULD ONCE
AGAIN DROP TO ABOUT 3500 FT MSL. HAVE NOT GONE THIS ROUTE WITH THE
FORECAST...BUT WILL CONTINUE TO MONITOR THE NEXT MODEL RUNS FOR
CHANGES.

ANOTHER COLD FRONT CAN BE EXPECTED TO IMPACT ALL AREAS NEXT
WEDNESDAY EVENING...STAY UP TO DATE WITH UPCOMING DISCUSSIONS TO SEE
HOW STRONG/WEAK THIS NEXT COLD FRONT IS EXPECTED TO BE.

&&

.AVIATION...18Z TAFS...VFR CONDITIONS WILL BE PREVALENT OVER THE
NEXT 24 HOURS. LINGERING MVFR VISIBILITIES WILL BE POSSIBLE AT KPSC
FOR THE NEXT HOUR OR TWO. A WEAK DISTURBANCE WILL BE MOVING ACROSS
THE AREA TODAY AND TONIGHT AND THERE WILL BE INCREASING MID AND
UPPER LEVEL CLOUDS TODAY BECOMING OVERCAST AT 5000-10000 FEET AGL
TONIGHT. PRECIPITATION WILL BE CONFINED MAINLY TO THE CASCADES. WITH
THE SYSTEM OVER THE AREA THE CHANCES FOR FOG LOOK TO BE LESS THAN
THE LAST COUPLE OF NIGHTS SO HAVE CONFINED MVFR VISIBILITY TO KDLS
AFTER 15Z. WINDS WILL REMAIN BELOW 12 KTS FOR THE NEXT 24 HOURS.
PERRY

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  53  36  54  39 /   0   0  10  10
ALW  51  38  54  41 /   0   0  10  10
PSC  52  35  51  37 /   0   0  10  10
YKM  53  35  49  37 /   0  10  20  20
HRI  52  36  52  38 /   0   0  10  10
ELN  43  31  42  35 /   0  10  20  30
RDM  63  34  59  38 /   0  10  10  10
LGD  47  34  49  37 /   0   0   0  10
GCD  61  31  52  34 /   0   0  10  10
DLS  55  40  54  41 /   0  10  20  20

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR ORZ041-044-
     050-505-507-508-510.

WA...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR WAZ024-
     026>029-520-521.

&&

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

$$

90/89/83




000
FXUS66 KPDT 101751 AAB
AFDPDT

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE PENDLETON OR
951 AM PST WED FEB 10 2016

UPDATED AVIATION DISCUSSION

.SHORT TERM...MORNING UPDATE...THE UPPER RIDGE OVER THE WESTERN U.S.
WILL WEAKEN OVER THE PACIFIC NORTHWEST TODAY AS A WEAK UPPER LEVEL
DISTURBANCE MOVES THROUGH THE REGION. THIS DISTURBANCE WILL BRING
VARIABLE AMOUNTS OF MID AND HIGH LEVEL CLOUDINESS TO THE REGION, BUT
ONLY LIMITED AMOUNTS OF PRECIP. AT THIS TIME, PRECIP IS EXPECTED TO
MAINLY OCCUR NEAR THE CASCADE CREST. THE FORECAST PACKAGE COVERS THE
PRECIP OCCURRENCES WELL AND ONLY MADE MINOR ADJUSTMENTS. FOG HAS
BEEN LIMITED ACROSS THE AREA THIS MORNING, WITH THE BASE OF THE
INVERSION OVER THE COLUMBIA BASIN BEING A BIT LOWER THAN YESTERDAY.
THUS ADJUSTED FOG LOCATIONS ACROSS THE AREA. ALSO, A FEW ADJUSTMENTS
TO SKY COVER AND WINDS WERE MADE FOR THIS UPDATE. 90

.LONG TERM...PREVIOUS DISCUSSION...AS THE COLD FRONT MAKES ITS WAY
ACROSS THE AREA...EXPECT RAIN FRIDAY NIGHT CHANGING OVER TO SNOW
ABOVE 3500 FT MSL BY SATURDAY MORNING. ANY NEW SNOW ACCUMULATIONS
ARE EXPECTED TO BE LIGHT DUE TO THE WET NATURE OF THE
PRECIPITATION...AND THAT SURFACE TEMPERATURES WILL LIKELY STILL BE
WARM AND ABOVE FREEZING DURING THE CHANGE OVER PROCESS. EXPECT
BREEZY TO WINDY CONDITIONS ACROSS THE LOWER ELEVATIONS ON SATURDAY
WITH THE COLD FRONT PASSAGE.

SUNDAY AND MONDAY...THE OVERALL PATTERN WILL STAY IN A PROGRESSIVE
WESTERLY FLOW...BUT SNOW LEVELS WILL BE ON THE RISE FOR THE MOST
PART...REBOUNDING TO ABOUT 7000-8000 FT MSL BY MONDAY AFTERNOON.
MOISTURE BANDS WILL ACCOMPANY THIS PROGRESSIVE FLOW...ALONG WITH MID
AND LOW LEVEL WIND INCREASES. AS A RESULT CERTAIN AREAS...ESPECIALLY
RIDGETOPS MAY BE BREEZY SUNDAY NIGHT INTO MONDAY...WITH FAIRLY
DECENT POP CHANCES THROUGH SUNDAY NIGHT.

HAVE TRANSITIONED TO A MORE CLIMO POP MONDAY THROUGH WEDNESDAY AS
MODEL QPF PLACEMENT VARIES FROM DAY TO DAY. A FEW OTHER MODEL
DISCREPANCIES IN THE EXTENDED AS WELL...REGARDING PRECIPITATION.
WILL WAIT TO SEE WHETHER OR NOT THE DRIER AIR TO THE SOUTH WILL
ATTEMPT TO SHIFT NORTH JUST ENOUGH TO PUSH THE MOISTURE BANDS NORTH
OF OUR FORECAST AREA. THIS WOULD SIGNIFICANTLY REDUCE POPS FOR THE
MONDAY EVENING THROUGH WEDNESDAY TIME PERIOD. ANOTHER DISCREPANCY IN
THE GFS/ECMWF MODEL IS THAT ECMWF HAS A FAST MOVING COLD FRONT...
WHICH RESULTS IN A BRIEF LOWERING OF THE SNOW LEVELS ON MONDAY NIGHT
INTO TUESDAY NIGHT. THIS MODEL SUGGESTS THAT SNOW LEVELS WOULD ONCE
AGAIN DROP TO ABOUT 3500 FT MSL. HAVE NOT GONE THIS ROUTE WITH THE
FORECAST...BUT WILL CONTINUE TO MONITOR THE NEXT MODEL RUNS FOR
CHANGES.

ANOTHER COLD FRONT CAN BE EXPECTED TO IMPACT ALL AREAS NEXT
WEDNESDAY EVENING...STAY UP TO DATE WITH UPCOMING DISCUSSIONS TO SEE
HOW STRONG/WEAK THIS NEXT COLD FRONT IS EXPECTED TO BE.

&&

.AVIATION...18Z TAFS...VFR CONDITIONS WILL BE PREVALENT OVER THE
NEXT 24 HOURS. LINGERING MVFR VISIBILITIES WILL BE POSSIBLE AT KPSC
FOR THE NEXT HOUR OR TWO. A WEAK DISTURBANCE WILL BE MOVING ACROSS
THE AREA TODAY AND TONIGHT AND THERE WILL BE INCREASING MID AND
UPPER LEVEL CLOUDS TODAY BECOMING OVERCAST AT 5000-10000 FEET AGL
TONIGHT. PRECIPITATION WILL BE CONFINED MAINLY TO THE CASCADES. WITH
THE SYSTEM OVER THE AREA THE CHANCES FOR FOG LOOK TO BE LESS THAN
THE LAST COUPLE OF NIGHTS SO HAVE CONFINED MVFR VISIBILITY TO KDLS
AFTER 15Z. WINDS WILL REMAIN BELOW 12 KTS FOR THE NEXT 24 HOURS.
PERRY

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  53  36  54  39 /   0   0  10  10
ALW  51  38  54  41 /   0   0  10  10
PSC  52  35  51  37 /   0   0  10  10
YKM  53  35  49  37 /   0  10  20  20
HRI  52  36  52  38 /   0   0  10  10
ELN  43  31  42  35 /   0  10  20  30
RDM  63  34  59  38 /   0  10  10  10
LGD  47  34  49  37 /   0   0   0  10
GCD  61  31  52  34 /   0   0  10  10
DLS  55  40  54  41 /   0  10  20  20

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR ORZ041-044-
     050-505-507-508-510.

WA...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR WAZ024-
     026>029-520-521.

&&

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

$$

90/89/83





000
FXUS66 KPDT 101731 AAA
AFDPDT

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE PENDLETON OR
930 AM PST WED FEB 10 2016

UPDATED WATCHES/WARNINGS/ADVISORIES SECTION

.SHORT TERM...MORNING UPDATE...THE UPPER RIDGE OVER THE WESTERN U.S.
WILL WEAKEN OVER THE PACIFIC NORTHWEST TODAY AS A WEAK UPPER LEVEL
DISTURBANCE MOVES THROUGH THE REGION. THIS DISTURBANCE WILL BRING
VARIABLE AMOUNTS OF MID AND HIGH LEVEL CLOUDINESS TO THE REGION, BUT
ONLY LIMITED AMOUNTS OF PRECIP. AT THIS TIME, PRECIP IS EXPECTED TO
MAINLY OCCUR NEAR THE CASCADE CREST. THE FORECAST PACKAGE COVERS THE
PRECIP OCCURRENCES WELL AND ONLY MADE MINOR ADJUSTMENTS. FOG HAS
BEEN LIMITED ACROSS THE AREA THIS MORNING, WITH THE BASE OF THE
INVERSION OVER THE COLUMBIA BASIN BEING A BIT LOWER THAN YESTERDAY.
THUS ADJUSTED FOG LOCATIONS ACROSS THE AREA. ALSO, A FEW ADJUSTMENTS
TO SKY COVER AND WINDS WERE MADE FOR THIS UPDATE. 90

.LONG TERM...PREVIOUS DISCUSSION...AS THE COLD FRONT MAKES ITS WAY
ACROSS THE AREA...EXPECT RAIN FRIDAY NIGHT CHANGING OVER TO SNOW
ABOVE 3500 FT MSL BY SATURDAY MORNING. ANY NEW SNOW ACCUMULATIONS
ARE EXPECTED TO BE LIGHT DUE TO THE WET NATURE OF THE
PRECIPITATION...AND THAT SURFACE TEMPERATURES WILL LIKELY STILL BE
WARM AND ABOVE FREEZING DURING THE CHANGE OVER PROCESS. EXPECT
BREEZY TO WINDY CONDITIONS ACROSS THE LOWER ELEVATIONS ON SATURDAY
WITH THE COLD FRONT PASSAGE.

SUNDAY AND MONDAY...THE OVERALL PATTERN WILL STAY IN A PROGRESSIVE
WESTERLY FLOW...BUT SNOW LEVELS WILL BE ON THE RISE FOR THE MOST
PART...REBOUNDING TO ABOUT 7000-8000 FT MSL BY MONDAY AFTERNOON.
MOISTURE BANDS WILL ACCOMPANY THIS PROGRESSIVE FLOW...ALONG WITH MID
AND LOW LEVEL WIND INCREASES. AS A RESULT CERTAIN AREAS...ESPECIALLY
RIDGETOPS MAY BE BREEZY SUNDAY NIGHT INTO MONDAY...WITH FAIRLY
DECENT POP CHANCES THROUGH SUNDAY NIGHT.

HAVE TRANSITIONED TO A MORE CLIMO POP MONDAY THROUGH WEDNESDAY AS
MODEL QPF PLACEMENT VARIES FROM DAY TO DAY. A FEW OTHER MODEL
DISCREPANCIES IN THE EXTENDED AS WELL...REGARDING PRECIPITATION.
WILL WAIT TO SEE WHETHER OR NOT THE DRIER AIR TO THE SOUTH WILL
ATTEMPT TO SHIFT NORTH JUST ENOUGH TO PUSH THE MOISTURE BANDS NORTH
OF OUR FORECAST AREA. THIS WOULD SIGNIFICANTLY REDUCE POPS FOR THE
MONDAY EVENING THROUGH WEDNESDAY TIME PERIOD. ANOTHER DISCREPANCY IN
THE GFS/ECMWF MODEL IS THAT ECMWF HAS A FAST MOVING COLD FRONT...
WHICH RESULTS IN A BRIEF LOWERING OF THE SNOW LEVELS ON MONDAY NIGHT
INTO TUESDAY NIGHT. THIS MODEL SUGGESTS THAT SNOW LEVELS WOULD ONCE
AGAIN DROP TO ABOUT 3500 FT MSL. HAVE NOT GONE THIS ROUTE WITH THE
FORECAST...BUT WILL CONTINUE TO MONITOR THE NEXT MODEL RUNS FOR
CHANGES.

ANOTHER COLD FRONT CAN BE EXPECTED TO IMPACT ALL AREAS NEXT
WEDNESDAY EVENING...STAY UP TO DATE WITH UPCOMING DISCUSSIONS TO SEE
HOW STRONG/WEAK THIS NEXT COLD FRONT IS EXPECTED TO BE.

&&

.AVIATION...PREVIOUS DISCUSSION...12Z TAFS...VFR CONDITIONS ARE
EXPECTED OVER THE NEXT 24 HOURS. BANDS OF MID AN HIGH LEVEL CLOUDS
CONTINUE TO MOVE OVER THE AREA. CLOUD COVER WILL INCREASE THROUGH
THE END OF THE TAF PERIOD AS THE NEXT WEATHER SYSTEM APPROACHES.
THIS WILL LIKELY AID IN THE REDUCED CHANCE OF ANY TAF SITES
DEVELOPING FG/FZFG THROUGH SUNRISE. THERE IS STILL A POSSIBILITY FOR
A FEW HOURS OF BR/FZFG BUT WILL MONITOR AND AMEND TAFS AS NEEDED DUE
TO LOW CONFIDENCE AND LIMITED LOW CLOUDS SHOWING UP ON SATELLITE.
WINDS EXPECTED TO BE DIURNALLY DRIVEN AND LESS THAN 10 KTS FOR THE
TAF PERIOD.

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  53  36  54  39 /   0   0  10  10
ALW  51  38  54  41 /   0   0  10  10
PSC  52  35  51  37 /   0   0  10  10
YKM  53  35  49  37 /   0  10  20  20
HRI  52  36  52  38 /   0   0  10  10
ELN  43  31  42  35 /   0  10  20  30
RDM  63  34  59  38 /   0  10  10  10
LGD  47  34  49  37 /   0   0   0  10
GCD  61  31  52  34 /   0   0  10  10
DLS  55  40  54  41 /   0  10  20  20

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR ORZ041-044-
     050-505-507-508-510.

WA...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR WAZ024-
     026>029-520-521.

&&

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

$$

90/89/83





000
FXUS66 KPDT 101731 AAA
AFDPDT

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE PENDLETON OR
930 AM PST WED FEB 10 2016

UPDATED WATCHES/WARNINGS/ADVISORIES SECTION

.SHORT TERM...MORNING UPDATE...THE UPPER RIDGE OVER THE WESTERN U.S.
WILL WEAKEN OVER THE PACIFIC NORTHWEST TODAY AS A WEAK UPPER LEVEL
DISTURBANCE MOVES THROUGH THE REGION. THIS DISTURBANCE WILL BRING
VARIABLE AMOUNTS OF MID AND HIGH LEVEL CLOUDINESS TO THE REGION, BUT
ONLY LIMITED AMOUNTS OF PRECIP. AT THIS TIME, PRECIP IS EXPECTED TO
MAINLY OCCUR NEAR THE CASCADE CREST. THE FORECAST PACKAGE COVERS THE
PRECIP OCCURRENCES WELL AND ONLY MADE MINOR ADJUSTMENTS. FOG HAS
BEEN LIMITED ACROSS THE AREA THIS MORNING, WITH THE BASE OF THE
INVERSION OVER THE COLUMBIA BASIN BEING A BIT LOWER THAN YESTERDAY.
THUS ADJUSTED FOG LOCATIONS ACROSS THE AREA. ALSO, A FEW ADJUSTMENTS
TO SKY COVER AND WINDS WERE MADE FOR THIS UPDATE. 90

.LONG TERM...PREVIOUS DISCUSSION...AS THE COLD FRONT MAKES ITS WAY
ACROSS THE AREA...EXPECT RAIN FRIDAY NIGHT CHANGING OVER TO SNOW
ABOVE 3500 FT MSL BY SATURDAY MORNING. ANY NEW SNOW ACCUMULATIONS
ARE EXPECTED TO BE LIGHT DUE TO THE WET NATURE OF THE
PRECIPITATION...AND THAT SURFACE TEMPERATURES WILL LIKELY STILL BE
WARM AND ABOVE FREEZING DURING THE CHANGE OVER PROCESS. EXPECT
BREEZY TO WINDY CONDITIONS ACROSS THE LOWER ELEVATIONS ON SATURDAY
WITH THE COLD FRONT PASSAGE.

SUNDAY AND MONDAY...THE OVERALL PATTERN WILL STAY IN A PROGRESSIVE
WESTERLY FLOW...BUT SNOW LEVELS WILL BE ON THE RISE FOR THE MOST
PART...REBOUNDING TO ABOUT 7000-8000 FT MSL BY MONDAY AFTERNOON.
MOISTURE BANDS WILL ACCOMPANY THIS PROGRESSIVE FLOW...ALONG WITH MID
AND LOW LEVEL WIND INCREASES. AS A RESULT CERTAIN AREAS...ESPECIALLY
RIDGETOPS MAY BE BREEZY SUNDAY NIGHT INTO MONDAY...WITH FAIRLY
DECENT POP CHANCES THROUGH SUNDAY NIGHT.

HAVE TRANSITIONED TO A MORE CLIMO POP MONDAY THROUGH WEDNESDAY AS
MODEL QPF PLACEMENT VARIES FROM DAY TO DAY. A FEW OTHER MODEL
DISCREPANCIES IN THE EXTENDED AS WELL...REGARDING PRECIPITATION.
WILL WAIT TO SEE WHETHER OR NOT THE DRIER AIR TO THE SOUTH WILL
ATTEMPT TO SHIFT NORTH JUST ENOUGH TO PUSH THE MOISTURE BANDS NORTH
OF OUR FORECAST AREA. THIS WOULD SIGNIFICANTLY REDUCE POPS FOR THE
MONDAY EVENING THROUGH WEDNESDAY TIME PERIOD. ANOTHER DISCREPANCY IN
THE GFS/ECMWF MODEL IS THAT ECMWF HAS A FAST MOVING COLD FRONT...
WHICH RESULTS IN A BRIEF LOWERING OF THE SNOW LEVELS ON MONDAY NIGHT
INTO TUESDAY NIGHT. THIS MODEL SUGGESTS THAT SNOW LEVELS WOULD ONCE
AGAIN DROP TO ABOUT 3500 FT MSL. HAVE NOT GONE THIS ROUTE WITH THE
FORECAST...BUT WILL CONTINUE TO MONITOR THE NEXT MODEL RUNS FOR
CHANGES.

ANOTHER COLD FRONT CAN BE EXPECTED TO IMPACT ALL AREAS NEXT
WEDNESDAY EVENING...STAY UP TO DATE WITH UPCOMING DISCUSSIONS TO SEE
HOW STRONG/WEAK THIS NEXT COLD FRONT IS EXPECTED TO BE.

&&

.AVIATION...PREVIOUS DISCUSSION...12Z TAFS...VFR CONDITIONS ARE
EXPECTED OVER THE NEXT 24 HOURS. BANDS OF MID AN HIGH LEVEL CLOUDS
CONTINUE TO MOVE OVER THE AREA. CLOUD COVER WILL INCREASE THROUGH
THE END OF THE TAF PERIOD AS THE NEXT WEATHER SYSTEM APPROACHES.
THIS WILL LIKELY AID IN THE REDUCED CHANCE OF ANY TAF SITES
DEVELOPING FG/FZFG THROUGH SUNRISE. THERE IS STILL A POSSIBILITY FOR
A FEW HOURS OF BR/FZFG BUT WILL MONITOR AND AMEND TAFS AS NEEDED DUE
TO LOW CONFIDENCE AND LIMITED LOW CLOUDS SHOWING UP ON SATELLITE.
WINDS EXPECTED TO BE DIURNALLY DRIVEN AND LESS THAN 10 KTS FOR THE
TAF PERIOD.

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  53  36  54  39 /   0   0  10  10
ALW  51  38  54  41 /   0   0  10  10
PSC  52  35  51  37 /   0   0  10  10
YKM  53  35  49  37 /   0  10  20  20
HRI  52  36  52  38 /   0   0  10  10
ELN  43  31  42  35 /   0  10  20  30
RDM  63  34  59  38 /   0  10  10  10
LGD  47  34  49  37 /   0   0   0  10
GCD  61  31  52  34 /   0   0  10  10
DLS  55  40  54  41 /   0  10  20  20

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR ORZ041-044-
     050-505-507-508-510.

WA...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR WAZ024-
     026>029-520-521.

&&

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

$$

90/89/83





000
FXUS66 KPDT 101708
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
908 AM PST WED FEB 10 2016

.SHORT TERM...MORNING UPDATE...THE UPPER RIDGE OVER THE WESTERN U.S.
WILL WEAKEN OVER THE PACIFIC NORTHWEST TODAY AS A WEAK UPPER LEVEL
DISTURBANCE MOVES THROUGH THE REGION. THIS DISTURBANCE WILL BRING
VARIABLE AMOUNTS OF MID AND HIGH LEVEL CLOUDINESS TO THE REGION, BUT
ONLY LIMITED AMOUNTS OF PRECIP. AT THIS TIME, PRECIP IS EXPECTED TO
MAINLY OCCUR NEAR THE CASCADE CREST. THE FORECAST PACKAGE COVERS THE
PRECIP OCCURRENCES WELL AND ONLY MADE MINOR ADJUSTMENTS. FOG HAS
BEEN LIMITED ACROSS THE AREA THIS MORNING, WITH THE BASE OF THE
INVERSION OVER THE COLUMBIA BASIN BEING A BIT LOWER THAN YESTERDAY.
THUS ADJUSTED FOG LOCATIONS ACROSS THE AREA. ALSO, A FEW ADJUSTMENTS
TO SKY COVER AND WINDS WERE MADE FOR THIS UPDATE. 90

.LONG TERM...PREVIOUS DISCUSSION...AS THE COLD FRONT MAKES ITS WAY
ACROSS THE AREA...EXPECT RAIN FRIDAY NIGHT CHANGING OVER TO SNOW
ABOVE 3500 FT MSL BY SATURDAY MORNING. ANY NEW SNOW ACCUMULATIONS
ARE EXPECTED TO BE LIGHT DUE TO THE WET NATURE OF THE
PRECIPITATION...AND THAT SURFACE TEMPERATURES WILL LIKELY STILL BE
WARM AND ABOVE FREEZING DURING THE CHANGE OVER PROCESS. EXPECT
BREEZY TO WINDY CONDITIONS ACROSS THE LOWER ELEVATIONS ON SATURDAY
WITH THE COLD FRONT PASSAGE.

SUNDAY AND MONDAY...THE OVERALL PATTERN WILL STAY IN A PROGRESSIVE
WESTERLY FLOW...BUT SNOW LEVELS WILL BE ON THE RISE FOR THE MOST
PART...REBOUNDING TO ABOUT 7000-8000 FT MSL BY MONDAY AFTERNOON.
MOISTURE BANDS WILL ACCOMPANY THIS PROGRESSIVE FLOW...ALONG WITH MID
AND LOW LEVEL WIND INCREASES. AS A RESULT CERTAIN AREAS...ESPECIALLY
RIDGETOPS MAY BE BREEZY SUNDAY NIGHT INTO MONDAY...WITH FAIRLY
DECENT POP CHANCES THROUGH SUNDAY NIGHT.

HAVE TRANSITIONED TO A MORE CLIMO POP MONDAY THROUGH WEDNESDAY AS
MODEL QPF PLACEMENT VARIES FROM DAY TO DAY. A FEW OTHER MODEL
DISCREPANCIES IN THE EXTENDED AS WELL...REGARDING PRECIPITATION.
WILL WAIT TO SEE WHETHER OR NOT THE DRIER AIR TO THE SOUTH WILL
ATTEMPT TO SHIFT NORTH JUST ENOUGH TO PUSH THE MOISTURE BANDS NORTH
OF OUR FORECAST AREA. THIS WOULD SIGNIFICANTLY REDUCE POPS FOR THE
MONDAY EVENING THROUGH WEDNESDAY TIME PERIOD. ANOTHER DISCREPANCY IN
THE GFS/ECMWF MODEL IS THAT ECMWF HAS A FAST MOVING COLD FRONT...
WHICH RESULTS IN A BRIEF LOWERING OF THE SNOW LEVELS ON MONDAY NIGHT
INTO TUESDAY NIGHT. THIS MODEL SUGGESTS THAT SNOW LEVELS WOULD ONCE
AGAIN DROP TO ABOUT 3500 FT MSL. HAVE NOT GONE THIS ROUTE WITH THE
FORECAST...BUT WILL CONTINUE TO MONITOR THE NEXT MODEL RUNS FOR
CHANGES.

ANOTHER COLD FRONT CAN BE EXPECTED TO IMPACT ALL AREAS NEXT
WEDNESDAY EVENING...STAY UP TO DATE WITH UPCOMING DISCUSSIONS TO SEE
HOW STRONG/WEAK THIS NEXT COLD FRONT IS EXPECTED TO BE.

&&

.AVIATION...PREVIOUS DISCUSSION...12Z TAFS...VFR CONDITIONS ARE
EXPECTED OVER THE NEXT 24 HOURS. BANDS OF MID AN HIGH LEVEL CLOUDS
CONTINUE TO MOVE OVER THE AREA. CLOUD COVER WILL INCREASE THROUGH
THE END OF THE TAF PERIOD AS THE NEXT WEATHER SYSTEM APPROACHES.
THIS WILL LIKELY AID IN THE REDUCED CHANCE OF ANY TAF SITES
DEVELOPING FG/FZFG THROUGH SUNRISE. THERE IS STILL A POSSIBILITY FOR
A FEW HOURS OF BR/FZFG BUT WILL MONITOR AND AMEND TAFS AS NEEDED DUE
TO LOW CONFIDENCE AND LIMITED LOW CLOUDS SHOWING UP ON SATELLITE.
WINDS EXPECTED TO BE DIURNALLY DRIVEN AND LESS THAN 10 KTS FOR THE
TAF PERIOD.

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  53  36  54  39 /   0   0  10  10
ALW  51  38  54  41 /   0   0  10  10
PSC  52  35  51  37 /   0   0  10  10
YKM  53  35  49  37 /   0  10  20  20
HRI  52  36  52  38 /   0   0  10  10
ELN  43  31  42  35 /   0  10  20  30
RDM  63  34  59  38 /   0  10  10  10
LGD  47  34  49  37 /   0   0   0  10
GCD  61  31  52  34 /   0   0  10  10
DLS  55  40  54  41 /   0  10  20  20

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR ORZ041-044-
     050-502-503-505-507-508-510.

WA...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR WAZ024-
     026>029-520-521.

&&

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

$$

90/89/83





000
FXUS66 KPDT 101708
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
908 AM PST WED FEB 10 2016

.SHORT TERM...MORNING UPDATE...THE UPPER RIDGE OVER THE WESTERN U.S.
WILL WEAKEN OVER THE PACIFIC NORTHWEST TODAY AS A WEAK UPPER LEVEL
DISTURBANCE MOVES THROUGH THE REGION. THIS DISTURBANCE WILL BRING
VARIABLE AMOUNTS OF MID AND HIGH LEVEL CLOUDINESS TO THE REGION, BUT
ONLY LIMITED AMOUNTS OF PRECIP. AT THIS TIME, PRECIP IS EXPECTED TO
MAINLY OCCUR NEAR THE CASCADE CREST. THE FORECAST PACKAGE COVERS THE
PRECIP OCCURRENCES WELL AND ONLY MADE MINOR ADJUSTMENTS. FOG HAS
BEEN LIMITED ACROSS THE AREA THIS MORNING, WITH THE BASE OF THE
INVERSION OVER THE COLUMBIA BASIN BEING A BIT LOWER THAN YESTERDAY.
THUS ADJUSTED FOG LOCATIONS ACROSS THE AREA. ALSO, A FEW ADJUSTMENTS
TO SKY COVER AND WINDS WERE MADE FOR THIS UPDATE. 90

.LONG TERM...PREVIOUS DISCUSSION...AS THE COLD FRONT MAKES ITS WAY
ACROSS THE AREA...EXPECT RAIN FRIDAY NIGHT CHANGING OVER TO SNOW
ABOVE 3500 FT MSL BY SATURDAY MORNING. ANY NEW SNOW ACCUMULATIONS
ARE EXPECTED TO BE LIGHT DUE TO THE WET NATURE OF THE
PRECIPITATION...AND THAT SURFACE TEMPERATURES WILL LIKELY STILL BE
WARM AND ABOVE FREEZING DURING THE CHANGE OVER PROCESS. EXPECT
BREEZY TO WINDY CONDITIONS ACROSS THE LOWER ELEVATIONS ON SATURDAY
WITH THE COLD FRONT PASSAGE.

SUNDAY AND MONDAY...THE OVERALL PATTERN WILL STAY IN A PROGRESSIVE
WESTERLY FLOW...BUT SNOW LEVELS WILL BE ON THE RISE FOR THE MOST
PART...REBOUNDING TO ABOUT 7000-8000 FT MSL BY MONDAY AFTERNOON.
MOISTURE BANDS WILL ACCOMPANY THIS PROGRESSIVE FLOW...ALONG WITH MID
AND LOW LEVEL WIND INCREASES. AS A RESULT CERTAIN AREAS...ESPECIALLY
RIDGETOPS MAY BE BREEZY SUNDAY NIGHT INTO MONDAY...WITH FAIRLY
DECENT POP CHANCES THROUGH SUNDAY NIGHT.

HAVE TRANSITIONED TO A MORE CLIMO POP MONDAY THROUGH WEDNESDAY AS
MODEL QPF PLACEMENT VARIES FROM DAY TO DAY. A FEW OTHER MODEL
DISCREPANCIES IN THE EXTENDED AS WELL...REGARDING PRECIPITATION.
WILL WAIT TO SEE WHETHER OR NOT THE DRIER AIR TO THE SOUTH WILL
ATTEMPT TO SHIFT NORTH JUST ENOUGH TO PUSH THE MOISTURE BANDS NORTH
OF OUR FORECAST AREA. THIS WOULD SIGNIFICANTLY REDUCE POPS FOR THE
MONDAY EVENING THROUGH WEDNESDAY TIME PERIOD. ANOTHER DISCREPANCY IN
THE GFS/ECMWF MODEL IS THAT ECMWF HAS A FAST MOVING COLD FRONT...
WHICH RESULTS IN A BRIEF LOWERING OF THE SNOW LEVELS ON MONDAY NIGHT
INTO TUESDAY NIGHT. THIS MODEL SUGGESTS THAT SNOW LEVELS WOULD ONCE
AGAIN DROP TO ABOUT 3500 FT MSL. HAVE NOT GONE THIS ROUTE WITH THE
FORECAST...BUT WILL CONTINUE TO MONITOR THE NEXT MODEL RUNS FOR
CHANGES.

ANOTHER COLD FRONT CAN BE EXPECTED TO IMPACT ALL AREAS NEXT
WEDNESDAY EVENING...STAY UP TO DATE WITH UPCOMING DISCUSSIONS TO SEE
HOW STRONG/WEAK THIS NEXT COLD FRONT IS EXPECTED TO BE.

&&

.AVIATION...PREVIOUS DISCUSSION...12Z TAFS...VFR CONDITIONS ARE
EXPECTED OVER THE NEXT 24 HOURS. BANDS OF MID AN HIGH LEVEL CLOUDS
CONTINUE TO MOVE OVER THE AREA. CLOUD COVER WILL INCREASE THROUGH
THE END OF THE TAF PERIOD AS THE NEXT WEATHER SYSTEM APPROACHES.
THIS WILL LIKELY AID IN THE REDUCED CHANCE OF ANY TAF SITES
DEVELOPING FG/FZFG THROUGH SUNRISE. THERE IS STILL A POSSIBILITY FOR
A FEW HOURS OF BR/FZFG BUT WILL MONITOR AND AMEND TAFS AS NEEDED DUE
TO LOW CONFIDENCE AND LIMITED LOW CLOUDS SHOWING UP ON SATELLITE.
WINDS EXPECTED TO BE DIURNALLY DRIVEN AND LESS THAN 10 KTS FOR THE
TAF PERIOD.

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  53  36  54  39 /   0   0  10  10
ALW  51  38  54  41 /   0   0  10  10
PSC  52  35  51  37 /   0   0  10  10
YKM  53  35  49  37 /   0  10  20  20
HRI  52  36  52  38 /   0   0  10  10
ELN  43  31  42  35 /   0  10  20  30
RDM  63  34  59  38 /   0  10  10  10
LGD  47  34  49  37 /   0   0   0  10
GCD  61  31  52  34 /   0   0  10  10
DLS  55  40  54  41 /   0  10  20  20

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR ORZ041-044-
     050-502-503-505-507-508-510.

WA...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR WAZ024-
     026>029-520-521.

&&

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

$$

90/89/83




000
FXUS66 KPDT 101058
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
258 AM PST WED FEB 10 2016

.SHORT TERM...TODAY THROUGH FRIDAY. A WEAK SHORT WAVE IS MOVING
ACROSS THE REGION TODAY. THIS SYSTEM IS MOVING INTO A FAIRLY
STRONG RIDGE. SATELLITE AND MODEL TRENDS INDICATE A WEAKENING
TREND. EXPECTING PARTLY CLOUDY SKIES FOR TODAY WITH MAINLY MID AND
HIGH LEVEL CLOUDS. PATCHY FOG IS DEVELOPING AND THIS WILL CONTINUE
INTO THE MORNING THEN DISSIPATE. A STRONGER SYSTEM MOVES ACROSS
THE PACIFIC NORTHWEST THURSDAY. MOSTLY CLOUDY SKIES WITH SCATTERED
SHOWERS MAINLY OVER THE CASCADES. AN UPPER LEVEL TROUGH AND COLD
FRONT MOVE THROUGH THE AREA FRIDAY. THIS WILL KEEP SKIES MOSTLY
CLOUDY WITH A BETTER CHANCE OF SHOWERS. PRESSURE GRADIENTS WILL
MAINTAIN BREEZY SOUTH WINDS IN THE GRANDE RONDE VALLEY TODAY
THROUGH FRIDAY. SNOW LEVELS REMAIN HIGH THROUGH THE PERIOD AS
FREEZING LEVELS ARE AT 7000-10000 FEET. OVERALL PRECIP AMOUNTS
WILL BE PRETTY LIGHT THE NEXT SEVERAL DAYS. HIGHEST AMOUNTS WILL
BE OVER THE WASHINGTON CASCADES. 94

.LONG TERM...FRIDAY NIGHT THROUGH WEDNESDAY...AS THE COLD FRONT
MAKES ITS WAY ACROSS THE AREA...EXPECT RAIN FRIDAY NIGHT CHANGING
OVER TO SNOW ABOVE 3500 FT MSL BY SATURDAY MORNING. ANY NEW SNOW
ACCUMULATIONS ARE EXPECTED TO BE LIGHT DUE TO THE WET NATURE OF THE
PRECIPITATION...AND THAT SURFACE TEMPERATURES WILL LIKELY STILL BE
WARM AND ABOVE FREEZING DURING THE CHANGE OVER PROCESS. EXPECT
BREEZY TO WINDY CONDITIONS ACROSS THE LOWER ELEVATIONS ON SATURDAY
WITH THE COLD FRONT PASSAGE.

SUNDAY AND MONDAY...THE OVERALL PATTERN WILL STAY IN A PROGRESSIVE
WESTERLY FLOW...BUT SNOW LEVELS WILL BE ON THE RISE FOR THE MOST
PART...REBOUNDING TO ABOUT 7000-8000 FT MSL BY MONDAY AFTERNOON.
MOISTURE BANDS WILL ACCOMPANY THIS PROGRESSIVE FLOW...ALONG WITH MID
AND LOW LEVEL WIND INCREASES.  AS A RESULT CERTAIN
AREAS...ESPECIALLY RIDGETOPS MAY BE BREEZY SUNDAY NIGHT INTO
MONDAY...WITH FAIRLY DECENT POP CHANCES THROUGH SUNDAY NIGHT.

HAVE TRANSITIONED TO A MORE CLIMO POP MONDAY THROUGH WEDNESDAY AS
MODEL QPF PLACEMENT VARIES FROM DAY TO DAY. A FEW OTHER MODEL
DISCREPANCIES IN THE EXTENDED AS WELL...REGARDING PRECIPITATION.
WILL WAIT TO SEE WHETHER OR NOT THE DRIER AIR TO THE SOUTH WILL
ATTEMPT TO SHIFT NORTH JUST ENOUGH TO PUSH THE MOISTURE BANDS NORTH
OF OUR FORECAST AREA. THIS WOULD SIGNIFICANTLY REDUCE POPS FOR THE
MONDAY EVENING THROUGH WEDNESDAY TIME PERIOD.  ANOTHER DISCREPANCY
IN THE GFS/ECMWF MODEL IS THAT ECMWF HAS A FAST MOVING COLD
FRONT...WHICH RESULTS IN A BRIEF LOWERING OF THE SNOW LEVELS ON
MONDAY NIGHT INTO TUESDAY NIGHT. THIS MODEL SUGGESTS THAT SNOW
LEVELS WOULD ONCE AGAIN DROP TO ABOUT 3500 FT MSL.  HAVE NOT GONE
THIS ROUTE WITH THE FORECAST...BUT WILL CONTINUE TO MONITOR THE NEXT
MODEL RUNS FOR CHANGES.

ANOTHER COLD FRONT CAN BE EXPECTED TO IMPACT ALL AREAS NEXT
WEDNESDAY EVENING...STAY UP TO DATE WITH UPCOMING DISCUSSIONS TO SEE
HOW STRONG/WEAK THIS NEXT COLD FRONT IS EXPECTED TO BE. WEBER

&&

.AVIATION...12Z TAFS...VFR CONDITIONS ARE EXPECTED OVER THE NEXT 24
HOURS. BANDS OF MID AN HIGH LEVEL CLOUDS CONTINUE TO MOVE OVER THE
AREA.  CLOUD COVER WILL INCREASE THROUGH THE END OF THE TAF PERIOD
AS THE NEXT WEATHER SYSTEM APPROACHES.  THIS WILL LIKELY AID IN THE
REDUCED CHANCE OF ANY TAF SITES DEVELOPING FG/FZFG THROUGH SUNRISE.
THERE IS STILL A POSSIBILITY FOR A FEW HOURS OF BR/FZFG BUT WILL
MONITOR AND AMEND TAFS AS NEEDED DUE TO LOW CONFIDENCE AND LIMITED
LOW CLOUDS SHOWING UP ON SATELLITE. WINDS EXPECTED TO BE DIURNALLY
DRIVEN AND LESS THAN 10 KTS FOR THE TAF PERIOD.  WEBER

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  53  36  54  39 /   0   0  10  10
ALW  51  38  54  41 /   0   0  10  10
PSC  52  35  51  37 /   0   0  10  10
YKM  53  35  49  37 /   0  10  20  20
HRI  52  36  52  38 /   0   0  10  10
ELN  43  31  42  35 /   0  10  20  30
RDM  63  34  59  38 /   0  10  10  10
LGD  47  34  49  37 /   0   0   0  10
GCD  61  31  52  34 /   0   0  10  10
DLS  55  40  54  41 /   0  10  20  20

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR ORZ041-044-
     050-502-503-505-507-508-510.

WA...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR WAZ024-
     026>029-520-521.

&&

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

$$

94/89/89





000
FXUS66 KPDT 101058
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
258 AM PST WED FEB 10 2016

.SHORT TERM...TODAY THROUGH FRIDAY. A WEAK SHORT WAVE IS MOVING
ACROSS THE REGION TODAY. THIS SYSTEM IS MOVING INTO A FAIRLY
STRONG RIDGE. SATELLITE AND MODEL TRENDS INDICATE A WEAKENING
TREND. EXPECTING PARTLY CLOUDY SKIES FOR TODAY WITH MAINLY MID AND
HIGH LEVEL CLOUDS. PATCHY FOG IS DEVELOPING AND THIS WILL CONTINUE
INTO THE MORNING THEN DISSIPATE. A STRONGER SYSTEM MOVES ACROSS
THE PACIFIC NORTHWEST THURSDAY. MOSTLY CLOUDY SKIES WITH SCATTERED
SHOWERS MAINLY OVER THE CASCADES. AN UPPER LEVEL TROUGH AND COLD
FRONT MOVE THROUGH THE AREA FRIDAY. THIS WILL KEEP SKIES MOSTLY
CLOUDY WITH A BETTER CHANCE OF SHOWERS. PRESSURE GRADIENTS WILL
MAINTAIN BREEZY SOUTH WINDS IN THE GRANDE RONDE VALLEY TODAY
THROUGH FRIDAY. SNOW LEVELS REMAIN HIGH THROUGH THE PERIOD AS
FREEZING LEVELS ARE AT 7000-10000 FEET. OVERALL PRECIP AMOUNTS
WILL BE PRETTY LIGHT THE NEXT SEVERAL DAYS. HIGHEST AMOUNTS WILL
BE OVER THE WASHINGTON CASCADES. 94

.LONG TERM...FRIDAY NIGHT THROUGH WEDNESDAY...AS THE COLD FRONT
MAKES ITS WAY ACROSS THE AREA...EXPECT RAIN FRIDAY NIGHT CHANGING
OVER TO SNOW ABOVE 3500 FT MSL BY SATURDAY MORNING. ANY NEW SNOW
ACCUMULATIONS ARE EXPECTED TO BE LIGHT DUE TO THE WET NATURE OF THE
PRECIPITATION...AND THAT SURFACE TEMPERATURES WILL LIKELY STILL BE
WARM AND ABOVE FREEZING DURING THE CHANGE OVER PROCESS. EXPECT
BREEZY TO WINDY CONDITIONS ACROSS THE LOWER ELEVATIONS ON SATURDAY
WITH THE COLD FRONT PASSAGE.

SUNDAY AND MONDAY...THE OVERALL PATTERN WILL STAY IN A PROGRESSIVE
WESTERLY FLOW...BUT SNOW LEVELS WILL BE ON THE RISE FOR THE MOST
PART...REBOUNDING TO ABOUT 7000-8000 FT MSL BY MONDAY AFTERNOON.
MOISTURE BANDS WILL ACCOMPANY THIS PROGRESSIVE FLOW...ALONG WITH MID
AND LOW LEVEL WIND INCREASES.  AS A RESULT CERTAIN
AREAS...ESPECIALLY RIDGETOPS MAY BE BREEZY SUNDAY NIGHT INTO
MONDAY...WITH FAIRLY DECENT POP CHANCES THROUGH SUNDAY NIGHT.

HAVE TRANSITIONED TO A MORE CLIMO POP MONDAY THROUGH WEDNESDAY AS
MODEL QPF PLACEMENT VARIES FROM DAY TO DAY. A FEW OTHER MODEL
DISCREPANCIES IN THE EXTENDED AS WELL...REGARDING PRECIPITATION.
WILL WAIT TO SEE WHETHER OR NOT THE DRIER AIR TO THE SOUTH WILL
ATTEMPT TO SHIFT NORTH JUST ENOUGH TO PUSH THE MOISTURE BANDS NORTH
OF OUR FORECAST AREA. THIS WOULD SIGNIFICANTLY REDUCE POPS FOR THE
MONDAY EVENING THROUGH WEDNESDAY TIME PERIOD.  ANOTHER DISCREPANCY
IN THE GFS/ECMWF MODEL IS THAT ECMWF HAS A FAST MOVING COLD
FRONT...WHICH RESULTS IN A BRIEF LOWERING OF THE SNOW LEVELS ON
MONDAY NIGHT INTO TUESDAY NIGHT. THIS MODEL SUGGESTS THAT SNOW
LEVELS WOULD ONCE AGAIN DROP TO ABOUT 3500 FT MSL.  HAVE NOT GONE
THIS ROUTE WITH THE FORECAST...BUT WILL CONTINUE TO MONITOR THE NEXT
MODEL RUNS FOR CHANGES.

ANOTHER COLD FRONT CAN BE EXPECTED TO IMPACT ALL AREAS NEXT
WEDNESDAY EVENING...STAY UP TO DATE WITH UPCOMING DISCUSSIONS TO SEE
HOW STRONG/WEAK THIS NEXT COLD FRONT IS EXPECTED TO BE. WEBER

&&

.AVIATION...12Z TAFS...VFR CONDITIONS ARE EXPECTED OVER THE NEXT 24
HOURS. BANDS OF MID AN HIGH LEVEL CLOUDS CONTINUE TO MOVE OVER THE
AREA.  CLOUD COVER WILL INCREASE THROUGH THE END OF THE TAF PERIOD
AS THE NEXT WEATHER SYSTEM APPROACHES.  THIS WILL LIKELY AID IN THE
REDUCED CHANCE OF ANY TAF SITES DEVELOPING FG/FZFG THROUGH SUNRISE.
THERE IS STILL A POSSIBILITY FOR A FEW HOURS OF BR/FZFG BUT WILL
MONITOR AND AMEND TAFS AS NEEDED DUE TO LOW CONFIDENCE AND LIMITED
LOW CLOUDS SHOWING UP ON SATELLITE. WINDS EXPECTED TO BE DIURNALLY
DRIVEN AND LESS THAN 10 KTS FOR THE TAF PERIOD.  WEBER

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  53  36  54  39 /   0   0  10  10
ALW  51  38  54  41 /   0   0  10  10
PSC  52  35  51  37 /   0   0  10  10
YKM  53  35  49  37 /   0  10  20  20
HRI  52  36  52  38 /   0   0  10  10
ELN  43  31  42  35 /   0  10  20  30
RDM  63  34  59  38 /   0  10  10  10
LGD  47  34  49  37 /   0   0   0  10
GCD  61  31  52  34 /   0   0  10  10
DLS  55  40  54  41 /   0  10  20  20

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR ORZ041-044-
     050-502-503-505-507-508-510.

WA...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR WAZ024-
     026>029-520-521.

&&

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

$$

94/89/89




000
FXUS66 KPDT 101058
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
258 AM PST WED FEB 10 2016

.SHORT TERM...TODAY THROUGH FRIDAY. A WEAK SHORT WAVE IS MOVING
ACROSS THE REGION TODAY. THIS SYSTEM IS MOVING INTO A FAIRLY
STRONG RIDGE. SATELLITE AND MODEL TRENDS INDICATE A WEAKENING
TREND. EXPECTING PARTLY CLOUDY SKIES FOR TODAY WITH MAINLY MID AND
HIGH LEVEL CLOUDS. PATCHY FOG IS DEVELOPING AND THIS WILL CONTINUE
INTO THE MORNING THEN DISSIPATE. A STRONGER SYSTEM MOVES ACROSS
THE PACIFIC NORTHWEST THURSDAY. MOSTLY CLOUDY SKIES WITH SCATTERED
SHOWERS MAINLY OVER THE CASCADES. AN UPPER LEVEL TROUGH AND COLD
FRONT MOVE THROUGH THE AREA FRIDAY. THIS WILL KEEP SKIES MOSTLY
CLOUDY WITH A BETTER CHANCE OF SHOWERS. PRESSURE GRADIENTS WILL
MAINTAIN BREEZY SOUTH WINDS IN THE GRANDE RONDE VALLEY TODAY
THROUGH FRIDAY. SNOW LEVELS REMAIN HIGH THROUGH THE PERIOD AS
FREEZING LEVELS ARE AT 7000-10000 FEET. OVERALL PRECIP AMOUNTS
WILL BE PRETTY LIGHT THE NEXT SEVERAL DAYS. HIGHEST AMOUNTS WILL
BE OVER THE WASHINGTON CASCADES. 94

.LONG TERM...FRIDAY NIGHT THROUGH WEDNESDAY...AS THE COLD FRONT
MAKES ITS WAY ACROSS THE AREA...EXPECT RAIN FRIDAY NIGHT CHANGING
OVER TO SNOW ABOVE 3500 FT MSL BY SATURDAY MORNING. ANY NEW SNOW
ACCUMULATIONS ARE EXPECTED TO BE LIGHT DUE TO THE WET NATURE OF THE
PRECIPITATION...AND THAT SURFACE TEMPERATURES WILL LIKELY STILL BE
WARM AND ABOVE FREEZING DURING THE CHANGE OVER PROCESS. EXPECT
BREEZY TO WINDY CONDITIONS ACROSS THE LOWER ELEVATIONS ON SATURDAY
WITH THE COLD FRONT PASSAGE.

SUNDAY AND MONDAY...THE OVERALL PATTERN WILL STAY IN A PROGRESSIVE
WESTERLY FLOW...BUT SNOW LEVELS WILL BE ON THE RISE FOR THE MOST
PART...REBOUNDING TO ABOUT 7000-8000 FT MSL BY MONDAY AFTERNOON.
MOISTURE BANDS WILL ACCOMPANY THIS PROGRESSIVE FLOW...ALONG WITH MID
AND LOW LEVEL WIND INCREASES.  AS A RESULT CERTAIN
AREAS...ESPECIALLY RIDGETOPS MAY BE BREEZY SUNDAY NIGHT INTO
MONDAY...WITH FAIRLY DECENT POP CHANCES THROUGH SUNDAY NIGHT.

HAVE TRANSITIONED TO A MORE CLIMO POP MONDAY THROUGH WEDNESDAY AS
MODEL QPF PLACEMENT VARIES FROM DAY TO DAY. A FEW OTHER MODEL
DISCREPANCIES IN THE EXTENDED AS WELL...REGARDING PRECIPITATION.
WILL WAIT TO SEE WHETHER OR NOT THE DRIER AIR TO THE SOUTH WILL
ATTEMPT TO SHIFT NORTH JUST ENOUGH TO PUSH THE MOISTURE BANDS NORTH
OF OUR FORECAST AREA. THIS WOULD SIGNIFICANTLY REDUCE POPS FOR THE
MONDAY EVENING THROUGH WEDNESDAY TIME PERIOD.  ANOTHER DISCREPANCY
IN THE GFS/ECMWF MODEL IS THAT ECMWF HAS A FAST MOVING COLD
FRONT...WHICH RESULTS IN A BRIEF LOWERING OF THE SNOW LEVELS ON
MONDAY NIGHT INTO TUESDAY NIGHT. THIS MODEL SUGGESTS THAT SNOW
LEVELS WOULD ONCE AGAIN DROP TO ABOUT 3500 FT MSL.  HAVE NOT GONE
THIS ROUTE WITH THE FORECAST...BUT WILL CONTINUE TO MONITOR THE NEXT
MODEL RUNS FOR CHANGES.

ANOTHER COLD FRONT CAN BE EXPECTED TO IMPACT ALL AREAS NEXT
WEDNESDAY EVENING...STAY UP TO DATE WITH UPCOMING DISCUSSIONS TO SEE
HOW STRONG/WEAK THIS NEXT COLD FRONT IS EXPECTED TO BE. WEBER

&&

.AVIATION...12Z TAFS...VFR CONDITIONS ARE EXPECTED OVER THE NEXT 24
HOURS. BANDS OF MID AN HIGH LEVEL CLOUDS CONTINUE TO MOVE OVER THE
AREA.  CLOUD COVER WILL INCREASE THROUGH THE END OF THE TAF PERIOD
AS THE NEXT WEATHER SYSTEM APPROACHES.  THIS WILL LIKELY AID IN THE
REDUCED CHANCE OF ANY TAF SITES DEVELOPING FG/FZFG THROUGH SUNRISE.
THERE IS STILL A POSSIBILITY FOR A FEW HOURS OF BR/FZFG BUT WILL
MONITOR AND AMEND TAFS AS NEEDED DUE TO LOW CONFIDENCE AND LIMITED
LOW CLOUDS SHOWING UP ON SATELLITE. WINDS EXPECTED TO BE DIURNALLY
DRIVEN AND LESS THAN 10 KTS FOR THE TAF PERIOD.  WEBER

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  53  36  54  39 /   0   0  10  10
ALW  51  38  54  41 /   0   0  10  10
PSC  52  35  51  37 /   0   0  10  10
YKM  53  35  49  37 /   0  10  20  20
HRI  52  36  52  38 /   0   0  10  10
ELN  43  31  42  35 /   0  10  20  30
RDM  63  34  59  38 /   0  10  10  10
LGD  47  34  49  37 /   0   0   0  10
GCD  61  31  52  34 /   0   0  10  10
DLS  55  40  54  41 /   0  10  20  20

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR ORZ041-044-
     050-502-503-505-507-508-510.

WA...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR WAZ024-
     026>029-520-521.

&&

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

$$

94/89/89





000
FXUS66 KPDT 100501 AAA
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
855 PM PST TUE FEB 9 2016

.UPDATE...A HIGH PRESSURE SYSTEM CONTINUES TO DOMINATE THE AREAS
WEATHER WITH DRY CONDITIONS TONIGHT. LOW LEVEL CLOUDS WILL CONTINUE
TO SLOWLY DEVELOP MOSTLY OVER THE LOW LYING AREAS. HOWEVER THE SKY
CONDITIONS WERE UPDATED TO INCREASE THESE CLOUDS OVER WALLOWA AND
CENTRAL OREGON. OTHER THAN SOME MINOR UPDATES TO LOW TEMPS THE
PRESENT SHORT TERM FORECAST APPEARS ON TRACK FOR NOW.

.AVIATION...06Z...PATCHY FOG IS EXPECTED TO DEVELOP OVERNIGHT AT
MOST TAF SITES AND CREATE AREAS OF MVFR AND LCL IFR VSBY AND
CEILINGS ESPECIALLY BETWEEN 10Z AND 16Z. SLOWLY THE FOG SHOULD
DISSIPATE AND A RETURN TO MOSTLY VFR CONDITIONS CAN BE EXPECTED BY
18Z.

&&

.PREV DISCUSSION... /ISSUED 404 PM PST TUE FEB 9 2016/

SHORT TERM...TONIGHT THROUGH FRIDAY...THE UPPER LEVEL RIDGE OVER
THE REGION IS BEGINNING TO WEAKEN AS WEATHER SYSTEMS OFF THE COAST
BUMP UP AGAINST IT. THE RIDGE WILL SLOWLY FLATTEN OVER THE NEXT
COUPLE OF DAYS ALLOWING A SOUTHWEST FLOW ALOFT TO BRING SOME
MOISTURE INTO THE REGION STARTING AS CLOUDS OVERNIGHT AND WEDNESDAY.
THERE WILL BE SOME LIGHT PRECIPITATION SPREADING INTO WESTERN
WASHINGTON AND OREGON ON WEDNESDAY EVENTUALLY REACHING THE
WASHINGTON CASCADES WEDNESDAY NIGHT AND THURSDAY. THE UPPER LEVEL
RIDGE WILL FINALLY BREAK DOWN ON FRIDAY ALLOWING A COLD FRONT TO
PUSH THROUGH THE FORECAST AREA FRIDAY INCREASING THE CHANCE OF
PRECIPITATION FOR THE ENTIRE AREA. SNOW LEVELS WILL REMAIN HIGH SO
EXPECTING MAINLY RAIN THROUGH FRIDAY.

LONG TERM...FRIDAY NIGHT THROUGH TUESDAY...PRESSURE PATTERN ALOFT
ACROSS NORTHEAST PACIFIC AND THE PACIFIC NORTHWEST BECOMES VERY
PROGRESSIVE WITH A SERIES OF PACIFIC WEATHER SYSTEMS TRACKING
EASTWARD THROUGH THE REGION THROUGH THE PERIOD. AS SUCH SNOW LEVELS
WILL BE UNSEASONABLY HIGH RESULTING IN PRECIPITATION BEING IN THE
FORM OF RAIN EACH DAY. THE FIRST UPPER LEVEL TROUGH APPROACHES THE
CASCADES FRIDAY NIGHT AND THEN SWEEPS A STRONG COLD FRONT THROUGH
THE FORECAST AREA ON SATURDAY. TIGHTENING SURFACE PRESSURE GRADIENTS
ACCOMPANYING THE COLD FRONT WILL PRODUCE BREEZY CONDITIONS BEGINNING
SOON AFTER DAYBREAK ON SATURDAY MORNING WITH BREEZY WINDS CONTINUING
THROUGH SATURDAY AFTERNOON. THE UPPER LEVEL TROUGH EXITS INTO
IDAHO/MONTANA SATURDAY AFTERNOON FOLLOWED BY A FLAT UPPER LEVEL
RIDGE OF HIGH PRESSURE BUILDING OVER THE PACIFIC NORTHWEST SATURDAY
NIGHT, WHICH WILL USHER IN A WARM FRONT AND ATTENDANT WARM AIR
OVERRUNNING RAIN FOR SATURDAY NIGHT, WHICH THEN PERSISTS THROUGH
SUNDAY AFTERNOON. AS THE RIDGE AMPLIFIES SUNDAY NIGHT AND MONDAY...
GEORGE WASHINGTON`S BIRTHDAY...SINKING AIR ASSOCIATED WITH THE RIDGE
WILL YIELD DRY CONDITIONS AT LOWER ELEVATIONS AND A LOW CHANCE OF
RAIN OVER THE HIGHER MOUNTAINS. MONDAY NIGHT AND TUESDAY THE RIDGE
WILL STILL BE OVER THE INTERIOR PACIFIC NORTHWEST FOR DRY CONDITIONS
IN CENTRAL OREGON AND EAST CENTRAL OREGON, BUT WITH A LOW CHANCE OF
RAIN IN THE MOUNTAINS ON TUESDAY.  POLAN

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  30  48  34  50 /   0   0   0  10
ALW  31  47  35  50 /   0   0   0  10
PSC  28  50  32  47 /   0   0   0  10
YKM  29  53  32  48 /   0   0  10  20
HRI  28  49  33  49 /   0   0   0  10
ELN  20  38  27  37 /   0   0  10  20
RDM  28  61  32  59 /   0   0   0  10
LGD  33  47  34  47 /   0   0   0   0
GCD  33  57  33  52 /   0   0   0  10
DLS  32  51  37  50 /   0   0  10  20

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR ORZ041-044-
     050-502-503-505-507-508-510.

WA...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR WAZ024-
     026>029-520-521.

&&

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

$$

97/97





000
FXUS66 KPDT 100501 AAA
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
855 PM PST TUE FEB 9 2016

.UPDATE...A HIGH PRESSURE SYSTEM CONTINUES TO DOMINATE THE AREAS
WEATHER WITH DRY CONDITIONS TONIGHT. LOW LEVEL CLOUDS WILL CONTINUE
TO SLOWLY DEVELOP MOSTLY OVER THE LOW LYING AREAS. HOWEVER THE SKY
CONDITIONS WERE UPDATED TO INCREASE THESE CLOUDS OVER WALLOWA AND
CENTRAL OREGON. OTHER THAN SOME MINOR UPDATES TO LOW TEMPS THE
PRESENT SHORT TERM FORECAST APPEARS ON TRACK FOR NOW.

.AVIATION...06Z...PATCHY FOG IS EXPECTED TO DEVELOP OVERNIGHT AT
MOST TAF SITES AND CREATE AREAS OF MVFR AND LCL IFR VSBY AND
CEILINGS ESPECIALLY BETWEEN 10Z AND 16Z. SLOWLY THE FOG SHOULD
DISSIPATE AND A RETURN TO MOSTLY VFR CONDITIONS CAN BE EXPECTED BY
18Z.

&&

.PREV DISCUSSION... /ISSUED 404 PM PST TUE FEB 9 2016/

SHORT TERM...TONIGHT THROUGH FRIDAY...THE UPPER LEVEL RIDGE OVER
THE REGION IS BEGINNING TO WEAKEN AS WEATHER SYSTEMS OFF THE COAST
BUMP UP AGAINST IT. THE RIDGE WILL SLOWLY FLATTEN OVER THE NEXT
COUPLE OF DAYS ALLOWING A SOUTHWEST FLOW ALOFT TO BRING SOME
MOISTURE INTO THE REGION STARTING AS CLOUDS OVERNIGHT AND WEDNESDAY.
THERE WILL BE SOME LIGHT PRECIPITATION SPREADING INTO WESTERN
WASHINGTON AND OREGON ON WEDNESDAY EVENTUALLY REACHING THE
WASHINGTON CASCADES WEDNESDAY NIGHT AND THURSDAY. THE UPPER LEVEL
RIDGE WILL FINALLY BREAK DOWN ON FRIDAY ALLOWING A COLD FRONT TO
PUSH THROUGH THE FORECAST AREA FRIDAY INCREASING THE CHANCE OF
PRECIPITATION FOR THE ENTIRE AREA. SNOW LEVELS WILL REMAIN HIGH SO
EXPECTING MAINLY RAIN THROUGH FRIDAY.

LONG TERM...FRIDAY NIGHT THROUGH TUESDAY...PRESSURE PATTERN ALOFT
ACROSS NORTHEAST PACIFIC AND THE PACIFIC NORTHWEST BECOMES VERY
PROGRESSIVE WITH A SERIES OF PACIFIC WEATHER SYSTEMS TRACKING
EASTWARD THROUGH THE REGION THROUGH THE PERIOD. AS SUCH SNOW LEVELS
WILL BE UNSEASONABLY HIGH RESULTING IN PRECIPITATION BEING IN THE
FORM OF RAIN EACH DAY. THE FIRST UPPER LEVEL TROUGH APPROACHES THE
CASCADES FRIDAY NIGHT AND THEN SWEEPS A STRONG COLD FRONT THROUGH
THE FORECAST AREA ON SATURDAY. TIGHTENING SURFACE PRESSURE GRADIENTS
ACCOMPANYING THE COLD FRONT WILL PRODUCE BREEZY CONDITIONS BEGINNING
SOON AFTER DAYBREAK ON SATURDAY MORNING WITH BREEZY WINDS CONTINUING
THROUGH SATURDAY AFTERNOON. THE UPPER LEVEL TROUGH EXITS INTO
IDAHO/MONTANA SATURDAY AFTERNOON FOLLOWED BY A FLAT UPPER LEVEL
RIDGE OF HIGH PRESSURE BUILDING OVER THE PACIFIC NORTHWEST SATURDAY
NIGHT, WHICH WILL USHER IN A WARM FRONT AND ATTENDANT WARM AIR
OVERRUNNING RAIN FOR SATURDAY NIGHT, WHICH THEN PERSISTS THROUGH
SUNDAY AFTERNOON. AS THE RIDGE AMPLIFIES SUNDAY NIGHT AND MONDAY...
GEORGE WASHINGTON`S BIRTHDAY...SINKING AIR ASSOCIATED WITH THE RIDGE
WILL YIELD DRY CONDITIONS AT LOWER ELEVATIONS AND A LOW CHANCE OF
RAIN OVER THE HIGHER MOUNTAINS. MONDAY NIGHT AND TUESDAY THE RIDGE
WILL STILL BE OVER THE INTERIOR PACIFIC NORTHWEST FOR DRY CONDITIONS
IN CENTRAL OREGON AND EAST CENTRAL OREGON, BUT WITH A LOW CHANCE OF
RAIN IN THE MOUNTAINS ON TUESDAY.  POLAN

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  30  48  34  50 /   0   0   0  10
ALW  31  47  35  50 /   0   0   0  10
PSC  28  50  32  47 /   0   0   0  10
YKM  29  53  32  48 /   0   0  10  20
HRI  28  49  33  49 /   0   0   0  10
ELN  20  38  27  37 /   0   0  10  20
RDM  28  61  32  59 /   0   0   0  10
LGD  33  47  34  47 /   0   0   0   0
GCD  33  57  33  52 /   0   0   0  10
DLS  32  51  37  50 /   0   0  10  20

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR ORZ041-044-
     050-502-503-505-507-508-510.

WA...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR WAZ024-
     026>029-520-521.

&&

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

$$

97/97





000
FXUS66 KPDT 100501 AAA
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
855 PM PST TUE FEB 9 2016

.UPDATE...A HIGH PRESSURE SYSTEM CONTINUES TO DOMINATE THE AREAS
WEATHER WITH DRY CONDITIONS TONIGHT. LOW LEVEL CLOUDS WILL CONTINUE
TO SLOWLY DEVELOP MOSTLY OVER THE LOW LYING AREAS. HOWEVER THE SKY
CONDITIONS WERE UPDATED TO INCREASE THESE CLOUDS OVER WALLOWA AND
CENTRAL OREGON. OTHER THAN SOME MINOR UPDATES TO LOW TEMPS THE
PRESENT SHORT TERM FORECAST APPEARS ON TRACK FOR NOW.

.AVIATION...06Z...PATCHY FOG IS EXPECTED TO DEVELOP OVERNIGHT AT
MOST TAF SITES AND CREATE AREAS OF MVFR AND LCL IFR VSBY AND
CEILINGS ESPECIALLY BETWEEN 10Z AND 16Z. SLOWLY THE FOG SHOULD
DISSIPATE AND A RETURN TO MOSTLY VFR CONDITIONS CAN BE EXPECTED BY
18Z.

&&

.PREV DISCUSSION... /ISSUED 404 PM PST TUE FEB 9 2016/

SHORT TERM...TONIGHT THROUGH FRIDAY...THE UPPER LEVEL RIDGE OVER
THE REGION IS BEGINNING TO WEAKEN AS WEATHER SYSTEMS OFF THE COAST
BUMP UP AGAINST IT. THE RIDGE WILL SLOWLY FLATTEN OVER THE NEXT
COUPLE OF DAYS ALLOWING A SOUTHWEST FLOW ALOFT TO BRING SOME
MOISTURE INTO THE REGION STARTING AS CLOUDS OVERNIGHT AND WEDNESDAY.
THERE WILL BE SOME LIGHT PRECIPITATION SPREADING INTO WESTERN
WASHINGTON AND OREGON ON WEDNESDAY EVENTUALLY REACHING THE
WASHINGTON CASCADES WEDNESDAY NIGHT AND THURSDAY. THE UPPER LEVEL
RIDGE WILL FINALLY BREAK DOWN ON FRIDAY ALLOWING A COLD FRONT TO
PUSH THROUGH THE FORECAST AREA FRIDAY INCREASING THE CHANCE OF
PRECIPITATION FOR THE ENTIRE AREA. SNOW LEVELS WILL REMAIN HIGH SO
EXPECTING MAINLY RAIN THROUGH FRIDAY.

LONG TERM...FRIDAY NIGHT THROUGH TUESDAY...PRESSURE PATTERN ALOFT
ACROSS NORTHEAST PACIFIC AND THE PACIFIC NORTHWEST BECOMES VERY
PROGRESSIVE WITH A SERIES OF PACIFIC WEATHER SYSTEMS TRACKING
EASTWARD THROUGH THE REGION THROUGH THE PERIOD. AS SUCH SNOW LEVELS
WILL BE UNSEASONABLY HIGH RESULTING IN PRECIPITATION BEING IN THE
FORM OF RAIN EACH DAY. THE FIRST UPPER LEVEL TROUGH APPROACHES THE
CASCADES FRIDAY NIGHT AND THEN SWEEPS A STRONG COLD FRONT THROUGH
THE FORECAST AREA ON SATURDAY. TIGHTENING SURFACE PRESSURE GRADIENTS
ACCOMPANYING THE COLD FRONT WILL PRODUCE BREEZY CONDITIONS BEGINNING
SOON AFTER DAYBREAK ON SATURDAY MORNING WITH BREEZY WINDS CONTINUING
THROUGH SATURDAY AFTERNOON. THE UPPER LEVEL TROUGH EXITS INTO
IDAHO/MONTANA SATURDAY AFTERNOON FOLLOWED BY A FLAT UPPER LEVEL
RIDGE OF HIGH PRESSURE BUILDING OVER THE PACIFIC NORTHWEST SATURDAY
NIGHT, WHICH WILL USHER IN A WARM FRONT AND ATTENDANT WARM AIR
OVERRUNNING RAIN FOR SATURDAY NIGHT, WHICH THEN PERSISTS THROUGH
SUNDAY AFTERNOON. AS THE RIDGE AMPLIFIES SUNDAY NIGHT AND MONDAY...
GEORGE WASHINGTON`S BIRTHDAY...SINKING AIR ASSOCIATED WITH THE RIDGE
WILL YIELD DRY CONDITIONS AT LOWER ELEVATIONS AND A LOW CHANCE OF
RAIN OVER THE HIGHER MOUNTAINS. MONDAY NIGHT AND TUESDAY THE RIDGE
WILL STILL BE OVER THE INTERIOR PACIFIC NORTHWEST FOR DRY CONDITIONS
IN CENTRAL OREGON AND EAST CENTRAL OREGON, BUT WITH A LOW CHANCE OF
RAIN IN THE MOUNTAINS ON TUESDAY.  POLAN

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  30  48  34  50 /   0   0   0  10
ALW  31  47  35  50 /   0   0   0  10
PSC  28  50  32  47 /   0   0   0  10
YKM  29  53  32  48 /   0   0  10  20
HRI  28  49  33  49 /   0   0   0  10
ELN  20  38  27  37 /   0   0  10  20
RDM  28  61  32  59 /   0   0   0  10
LGD  33  47  34  47 /   0   0   0   0
GCD  33  57  33  52 /   0   0   0  10
DLS  32  51  37  50 /   0   0  10  20

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR ORZ041-044-
     050-502-503-505-507-508-510.

WA...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR WAZ024-
     026>029-520-521.

&&

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

$$

97/97




000
FXUS66 KPDT 100005 AAA
AFDPDT

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE PENDLETON OR
404 PM PST TUE FEB 9 2016

UPDATED AVIATION DISCUSSION

.SHORT TERM...TONIGHT THROUGH FRIDAY...THE UPPER LEVEL RIDGE OVER
THE REGION IS BEGINNING TO WEAKEN AS WEATHER SYSTEMS OFF THE COAST
BUMP UP AGAINST IT. THE RIDGE WILL SLOWLY FLATTEN OVER THE NEXT
COUPLE OF DAYS ALLOWING A SOUTHWEST FLOW ALOFT TO BRING SOME
MOISTURE INTO THE REGION STARTING AS CLOUDS OVERNIGHT AND WEDNESDAY.
THERE WILL BE SOME LIGHT PRECIPITATION SPREADING INTO WESTERN
WASHINGTON AND OREGON ON WEDNESDAY EVENTUALLY REACHING THE
WASHINGTON CASCADES WEDNESDAY NIGHT AND THURSDAY. THE UPPER LEVEL
RIDGE WILL FINALLY BREAK DOWN ON FRIDAY ALLOWING A COLD FRONT TO
PUSH THROUGH THE FORECAST AREA FRIDAY INCREASING THE CHANCE OF
PRECIPITATION FOR THE ENTIRE AREA. SNOW LEVELS WILL REMAIN HIGH SO
EXPECTING MAINLY RAIN THROUGH FRIDAY.

.LONG TERM...FRIDAY NIGHT THROUGH TUESDAY...PRESSURE PATTERN ALOFT
ACROSS NORTHEAST PACIFIC AND THE PACIFIC NORTHWEST BECOMES VERY
PROGRESSIVE WITH A SERIES OF PACIFIC WEATHER SYSTEMS TRACKING
EASTWARD THROUGH THE REGION THROUGH THE PERIOD. AS SUCH SNOW LEVELS
WILL BE UNSEASONABLY HIGH RESULTING IN PRECIPITATION BEING IN THE
FORM OF RAIN EACH DAY. THE FIRST UPPER LEVEL TROUGH APPROACHES THE
CASCADES FRIDAY NIGHT AND THEN SWEEPS A STRONG COLD FRONT THROUGH
THE FORECAST AREA ON SATURDAY. TIGHTENING SURFACE PRESSURE GRADIENTS
ACCOMPANYING THE COLD FRONT WILL PRODUCE BREEZY CONDITIONS BEGINNING
SOON AFTER DAYBREAK ON SATURDAY MORNING WITH BREEZY WINDS CONTINUING
THROUGH SATURDAY AFTERNOON. THE UPPER LEVEL TROUGH EXITS INTO
IDAHO/MONTANA SATURDAY AFTERNOON FOLLOWED BY A FLAT UPPER LEVEL
RIDGE OF HIGH PRESSURE BUILDING OVER THE PACIFIC NORTHWEST SATURDAY
NIGHT, WHICH WILL USHER IN A WARM FRONT AND ATTENDANT WARM AIR
OVERRUNNING RAIN FOR SATURDAY NIGHT, WHICH THEN PERSISTS THROUGH
SUNDAY AFTERNOON. AS THE RIDGE AMPLIFIES SUNDAY NIGHT AND MONDAY...
GEORGE WASHINGTON`S BIRTHDAY...SINKING AIR ASSOCIATED WITH THE RIDGE
WILL YIELD DRY CONDITIONS AT LOWER ELEVATIONS AND A LOW CHANCE OF
RAIN OVER THE HIGHER MOUNTAINS. MONDAY NIGHT AND TUESDAY THE RIDGE
WILL STILL BE OVER THE INTERIOR PACIFIC NORTHWEST FOR DRY CONDITIONS
IN CENTRAL OREGON AND EAST CENTRAL OREGON, BUT WITH A LOW CHANCE OF
RAIN IN THE MOUNTAINS ON TUESDAY.  POLAN

&&

.AVIATION...00Z TAFS...VFR CONDITIONS WILL CONTINUE THROUGH THIS
EVENING. THEN A STRENGTHENING INVERSION WILL TRAP AND INCREASE
MOISTURE IN THE BOUNDARY LAYER PRODUCING LOW CIGS AND FOG DUE TO
INCREASING AREAL COVERAGE OF LOW STRATUS AND FOG IN THE LOWER
COLUMBIA BASIN AND ADJACENT VALLEYS BEGINNING AROUND MIDNIGHT AND
CONTINUING WELL PAST DAYBREAK ON WEDNESDAY. AS SUCH CONDITIONS ARE
EXPECTED TO DETERIORATE AT KYKM, KPSC, KRDM AND KBDN BECOMING VLIFR
AT KRDM AND KBDN, WITH KPSC AND KYKM BECOMING LIFR.

CONDITIONS AT KYKM WILL IMPROVE TO IFR BY AROUND 20Z-21Z TOMORROW.
CONDITIONS AT KPSC  WILL IMPROVE TO VFR BY 21Z.
CONDITIONS AT KRDM AND KBDN SHOULD IMPROVE TO VFR BY AROUND 16Z-17Z.

I KEPT KDLS, KPDT AND KALW AT VFR FOR THE NEXT 24 HOURS, AS GUIDANCE
SHOWED DOWNSLOPE DRAINAGE WINDS AND/OR MIXING IN THE BOUNDARY LAYER
IN COMBINATION WITH A DRIER BOUNDARY LAYER INITIALLY, SO THESE
FACTORS SHOULD WORK AGAINST FORMATION OF FOG AND LOW STRATUS CLOUDS
AT THOSE TAF SITES TONIGHT. IF VISIBILITY DOES LOWER TO 5-6SM WITH
LOCALIZED MVFR CONDITIONS AT KDLS, KPDT AND KALW, THESE SITES WILL
BE AMENDED OR THEIR FORECAST UPDATED BASED IN NEW SCHEDULED TAF
ISSUANCES LATER THIS EVENING IF NEW MODEL FORECAST GUIDANCE CHANGES.

SURFACE WINDS LESS THAN 10 KTS FOR THE NEXT 24 HOURS.  POLAN

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  30  46  34  50 /   0   0   0  10
ALW  31  46  35  50 /   0   0   0  10
PSC  28  47  32  47 /   0   0   0  10
YKM  29  50  32  48 /   0   0  10  20
HRI  28  46  33  49 /   0   0   0  10
ELN  20  34  27  37 /   0   0  10  20
RDM  28  60  32  59 /   0   0   0  10
LGD  34  46  34  47 /   0   0   0   0
GCD  33  56  33  52 /   0   0   0  10
DLS  32  50  37  50 /   0   0  10  20

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR ORZ041-044-
     050-502-503-505-507-508-510.

WA...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR WAZ024-
     026>029-520-521.

&&

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

$$

91/99/99





000
FXUS66 KPDT 100005 AAA
AFDPDT

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE PENDLETON OR
404 PM PST TUE FEB 9 2016

UPDATED AVIATION DISCUSSION

.SHORT TERM...TONIGHT THROUGH FRIDAY...THE UPPER LEVEL RIDGE OVER
THE REGION IS BEGINNING TO WEAKEN AS WEATHER SYSTEMS OFF THE COAST
BUMP UP AGAINST IT. THE RIDGE WILL SLOWLY FLATTEN OVER THE NEXT
COUPLE OF DAYS ALLOWING A SOUTHWEST FLOW ALOFT TO BRING SOME
MOISTURE INTO THE REGION STARTING AS CLOUDS OVERNIGHT AND WEDNESDAY.
THERE WILL BE SOME LIGHT PRECIPITATION SPREADING INTO WESTERN
WASHINGTON AND OREGON ON WEDNESDAY EVENTUALLY REACHING THE
WASHINGTON CASCADES WEDNESDAY NIGHT AND THURSDAY. THE UPPER LEVEL
RIDGE WILL FINALLY BREAK DOWN ON FRIDAY ALLOWING A COLD FRONT TO
PUSH THROUGH THE FORECAST AREA FRIDAY INCREASING THE CHANCE OF
PRECIPITATION FOR THE ENTIRE AREA. SNOW LEVELS WILL REMAIN HIGH SO
EXPECTING MAINLY RAIN THROUGH FRIDAY.

.LONG TERM...FRIDAY NIGHT THROUGH TUESDAY...PRESSURE PATTERN ALOFT
ACROSS NORTHEAST PACIFIC AND THE PACIFIC NORTHWEST BECOMES VERY
PROGRESSIVE WITH A SERIES OF PACIFIC WEATHER SYSTEMS TRACKING
EASTWARD THROUGH THE REGION THROUGH THE PERIOD. AS SUCH SNOW LEVELS
WILL BE UNSEASONABLY HIGH RESULTING IN PRECIPITATION BEING IN THE
FORM OF RAIN EACH DAY. THE FIRST UPPER LEVEL TROUGH APPROACHES THE
CASCADES FRIDAY NIGHT AND THEN SWEEPS A STRONG COLD FRONT THROUGH
THE FORECAST AREA ON SATURDAY. TIGHTENING SURFACE PRESSURE GRADIENTS
ACCOMPANYING THE COLD FRONT WILL PRODUCE BREEZY CONDITIONS BEGINNING
SOON AFTER DAYBREAK ON SATURDAY MORNING WITH BREEZY WINDS CONTINUING
THROUGH SATURDAY AFTERNOON. THE UPPER LEVEL TROUGH EXITS INTO
IDAHO/MONTANA SATURDAY AFTERNOON FOLLOWED BY A FLAT UPPER LEVEL
RIDGE OF HIGH PRESSURE BUILDING OVER THE PACIFIC NORTHWEST SATURDAY
NIGHT, WHICH WILL USHER IN A WARM FRONT AND ATTENDANT WARM AIR
OVERRUNNING RAIN FOR SATURDAY NIGHT, WHICH THEN PERSISTS THROUGH
SUNDAY AFTERNOON. AS THE RIDGE AMPLIFIES SUNDAY NIGHT AND MONDAY...
GEORGE WASHINGTON`S BIRTHDAY...SINKING AIR ASSOCIATED WITH THE RIDGE
WILL YIELD DRY CONDITIONS AT LOWER ELEVATIONS AND A LOW CHANCE OF
RAIN OVER THE HIGHER MOUNTAINS. MONDAY NIGHT AND TUESDAY THE RIDGE
WILL STILL BE OVER THE INTERIOR PACIFIC NORTHWEST FOR DRY CONDITIONS
IN CENTRAL OREGON AND EAST CENTRAL OREGON, BUT WITH A LOW CHANCE OF
RAIN IN THE MOUNTAINS ON TUESDAY.  POLAN

&&

.AVIATION...00Z TAFS...VFR CONDITIONS WILL CONTINUE THROUGH THIS
EVENING. THEN A STRENGTHENING INVERSION WILL TRAP AND INCREASE
MOISTURE IN THE BOUNDARY LAYER PRODUCING LOW CIGS AND FOG DUE TO
INCREASING AREAL COVERAGE OF LOW STRATUS AND FOG IN THE LOWER
COLUMBIA BASIN AND ADJACENT VALLEYS BEGINNING AROUND MIDNIGHT AND
CONTINUING WELL PAST DAYBREAK ON WEDNESDAY. AS SUCH CONDITIONS ARE
EXPECTED TO DETERIORATE AT KYKM, KPSC, KRDM AND KBDN BECOMING VLIFR
AT KRDM AND KBDN, WITH KPSC AND KYKM BECOMING LIFR.

CONDITIONS AT KYKM WILL IMPROVE TO IFR BY AROUND 20Z-21Z TOMORROW.
CONDITIONS AT KPSC  WILL IMPROVE TO VFR BY 21Z.
CONDITIONS AT KRDM AND KBDN SHOULD IMPROVE TO VFR BY AROUND 16Z-17Z.

I KEPT KDLS, KPDT AND KALW AT VFR FOR THE NEXT 24 HOURS, AS GUIDANCE
SHOWED DOWNSLOPE DRAINAGE WINDS AND/OR MIXING IN THE BOUNDARY LAYER
IN COMBINATION WITH A DRIER BOUNDARY LAYER INITIALLY, SO THESE
FACTORS SHOULD WORK AGAINST FORMATION OF FOG AND LOW STRATUS CLOUDS
AT THOSE TAF SITES TONIGHT. IF VISIBILITY DOES LOWER TO 5-6SM WITH
LOCALIZED MVFR CONDITIONS AT KDLS, KPDT AND KALW, THESE SITES WILL
BE AMENDED OR THEIR FORECAST UPDATED BASED IN NEW SCHEDULED TAF
ISSUANCES LATER THIS EVENING IF NEW MODEL FORECAST GUIDANCE CHANGES.

SURFACE WINDS LESS THAN 10 KTS FOR THE NEXT 24 HOURS.  POLAN

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  30  46  34  50 /   0   0   0  10
ALW  31  46  35  50 /   0   0   0  10
PSC  28  47  32  47 /   0   0   0  10
YKM  29  50  32  48 /   0   0  10  20
HRI  28  46  33  49 /   0   0   0  10
ELN  20  34  27  37 /   0   0  10  20
RDM  28  60  32  59 /   0   0   0  10
LGD  34  46  34  47 /   0   0   0   0
GCD  33  56  33  52 /   0   0   0  10
DLS  32  50  37  50 /   0   0  10  20

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR ORZ041-044-
     050-502-503-505-507-508-510.

WA...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR WAZ024-
     026>029-520-521.

&&

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

$$

91/99/99




000
FXUS66 KPDT 100005 AAA
AFDPDT

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE PENDLETON OR
404 PM PST TUE FEB 9 2016

UPDATED AVIATION DISCUSSION

.SHORT TERM...TONIGHT THROUGH FRIDAY...THE UPPER LEVEL RIDGE OVER
THE REGION IS BEGINNING TO WEAKEN AS WEATHER SYSTEMS OFF THE COAST
BUMP UP AGAINST IT. THE RIDGE WILL SLOWLY FLATTEN OVER THE NEXT
COUPLE OF DAYS ALLOWING A SOUTHWEST FLOW ALOFT TO BRING SOME
MOISTURE INTO THE REGION STARTING AS CLOUDS OVERNIGHT AND WEDNESDAY.
THERE WILL BE SOME LIGHT PRECIPITATION SPREADING INTO WESTERN
WASHINGTON AND OREGON ON WEDNESDAY EVENTUALLY REACHING THE
WASHINGTON CASCADES WEDNESDAY NIGHT AND THURSDAY. THE UPPER LEVEL
RIDGE WILL FINALLY BREAK DOWN ON FRIDAY ALLOWING A COLD FRONT TO
PUSH THROUGH THE FORECAST AREA FRIDAY INCREASING THE CHANCE OF
PRECIPITATION FOR THE ENTIRE AREA. SNOW LEVELS WILL REMAIN HIGH SO
EXPECTING MAINLY RAIN THROUGH FRIDAY.

.LONG TERM...FRIDAY NIGHT THROUGH TUESDAY...PRESSURE PATTERN ALOFT
ACROSS NORTHEAST PACIFIC AND THE PACIFIC NORTHWEST BECOMES VERY
PROGRESSIVE WITH A SERIES OF PACIFIC WEATHER SYSTEMS TRACKING
EASTWARD THROUGH THE REGION THROUGH THE PERIOD. AS SUCH SNOW LEVELS
WILL BE UNSEASONABLY HIGH RESULTING IN PRECIPITATION BEING IN THE
FORM OF RAIN EACH DAY. THE FIRST UPPER LEVEL TROUGH APPROACHES THE
CASCADES FRIDAY NIGHT AND THEN SWEEPS A STRONG COLD FRONT THROUGH
THE FORECAST AREA ON SATURDAY. TIGHTENING SURFACE PRESSURE GRADIENTS
ACCOMPANYING THE COLD FRONT WILL PRODUCE BREEZY CONDITIONS BEGINNING
SOON AFTER DAYBREAK ON SATURDAY MORNING WITH BREEZY WINDS CONTINUING
THROUGH SATURDAY AFTERNOON. THE UPPER LEVEL TROUGH EXITS INTO
IDAHO/MONTANA SATURDAY AFTERNOON FOLLOWED BY A FLAT UPPER LEVEL
RIDGE OF HIGH PRESSURE BUILDING OVER THE PACIFIC NORTHWEST SATURDAY
NIGHT, WHICH WILL USHER IN A WARM FRONT AND ATTENDANT WARM AIR
OVERRUNNING RAIN FOR SATURDAY NIGHT, WHICH THEN PERSISTS THROUGH
SUNDAY AFTERNOON. AS THE RIDGE AMPLIFIES SUNDAY NIGHT AND MONDAY...
GEORGE WASHINGTON`S BIRTHDAY...SINKING AIR ASSOCIATED WITH THE RIDGE
WILL YIELD DRY CONDITIONS AT LOWER ELEVATIONS AND A LOW CHANCE OF
RAIN OVER THE HIGHER MOUNTAINS. MONDAY NIGHT AND TUESDAY THE RIDGE
WILL STILL BE OVER THE INTERIOR PACIFIC NORTHWEST FOR DRY CONDITIONS
IN CENTRAL OREGON AND EAST CENTRAL OREGON, BUT WITH A LOW CHANCE OF
RAIN IN THE MOUNTAINS ON TUESDAY.  POLAN

&&

.AVIATION...00Z TAFS...VFR CONDITIONS WILL CONTINUE THROUGH THIS
EVENING. THEN A STRENGTHENING INVERSION WILL TRAP AND INCREASE
MOISTURE IN THE BOUNDARY LAYER PRODUCING LOW CIGS AND FOG DUE TO
INCREASING AREAL COVERAGE OF LOW STRATUS AND FOG IN THE LOWER
COLUMBIA BASIN AND ADJACENT VALLEYS BEGINNING AROUND MIDNIGHT AND
CONTINUING WELL PAST DAYBREAK ON WEDNESDAY. AS SUCH CONDITIONS ARE
EXPECTED TO DETERIORATE AT KYKM, KPSC, KRDM AND KBDN BECOMING VLIFR
AT KRDM AND KBDN, WITH KPSC AND KYKM BECOMING LIFR.

CONDITIONS AT KYKM WILL IMPROVE TO IFR BY AROUND 20Z-21Z TOMORROW.
CONDITIONS AT KPSC  WILL IMPROVE TO VFR BY 21Z.
CONDITIONS AT KRDM AND KBDN SHOULD IMPROVE TO VFR BY AROUND 16Z-17Z.

I KEPT KDLS, KPDT AND KALW AT VFR FOR THE NEXT 24 HOURS, AS GUIDANCE
SHOWED DOWNSLOPE DRAINAGE WINDS AND/OR MIXING IN THE BOUNDARY LAYER
IN COMBINATION WITH A DRIER BOUNDARY LAYER INITIALLY, SO THESE
FACTORS SHOULD WORK AGAINST FORMATION OF FOG AND LOW STRATUS CLOUDS
AT THOSE TAF SITES TONIGHT. IF VISIBILITY DOES LOWER TO 5-6SM WITH
LOCALIZED MVFR CONDITIONS AT KDLS, KPDT AND KALW, THESE SITES WILL
BE AMENDED OR THEIR FORECAST UPDATED BASED IN NEW SCHEDULED TAF
ISSUANCES LATER THIS EVENING IF NEW MODEL FORECAST GUIDANCE CHANGES.

SURFACE WINDS LESS THAN 10 KTS FOR THE NEXT 24 HOURS.  POLAN

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  30  46  34  50 /   0   0   0  10
ALW  31  46  35  50 /   0   0   0  10
PSC  28  47  32  47 /   0   0   0  10
YKM  29  50  32  48 /   0   0  10  20
HRI  28  46  33  49 /   0   0   0  10
ELN  20  34  27  37 /   0   0  10  20
RDM  28  60  32  59 /   0   0   0  10
LGD  34  46  34  47 /   0   0   0   0
GCD  33  56  33  52 /   0   0   0  10
DLS  32  50  37  50 /   0   0  10  20

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR ORZ041-044-
     050-502-503-505-507-508-510.

WA...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR WAZ024-
     026>029-520-521.

&&

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

$$

91/99/99





000
FXUS66 KPDT 092244
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
143 PM PST TUE FEB 9 2016

.SHORT TERM...TONIGHT THROUGH FRIDAY...THE UPPER LEVEL RIDGE OVER
THE REGION IS BEGINNING TO WEAKEN AS WEATHER SYSTEMS OFF THE COAST
BUMP UP AGAINST IT. THE RIDGE WILL SLOWLY FLATTEN OVER THE NEXT
COUPLE OF DAYS ALLOWING A SOUTHWEST FLOW ALOFT TO BRING SOME
MOISTURE INTO THE REGION STARTING AS CLOUDS OVERNIGHT AND WEDNESDAY.
THERE WILL BE SOME LIGHT PRECIPITATION SPREADING INTO WESTERN
WASHINGTON AND OREGON ON WEDNESDAY EVENTUALLY REACHING THE
WASHINGTON CASCADES WEDNESDAY NIGHT AND THURSDAY. THE UPPER LEVEL
RIDGE WILL FINALLY BREAK DOWN ON FRIDAY ALLOWING A COLD FRONT TO
PUSH THROUGH THE FORECAST AREA FRIDAY INCREASING THE CHANCE OF
PRECIPITATION FOR THE ENTIRE AREA. SNOW LEVELS WILL REMAIN HIGH SO
EXPECTING MAINLY RAIN THROUGH FRIDAY.


.


.LONG TERM...FRIDAY NIGHT THROUGH TUESDAY...PRESSURE PATTERN ALOFT
ACROSS NORTHEAST PACIFIC AND THE PACIFIC NORTHWEST BECOMES VERY
PROGRESSIVE WITH A SERIES OF PACIFIC WEATHER SYSTEMS TRACKING
EASTWARD THROUGH THE REGION THROUGH THE PERIOD. AS SUCH SNOW LEVELS
WILL BE UNSEASONABLY HIGH RESULTING IN PRECIPITATION BEING IN THE
FORM OF RAIN EACH DAY. THE FIRST UPPER LEVEL TROUGH APPROACHES THE
CASCADES FRIDAY NIGHT AND THEN SWEEPS A STRONG COLD FRONT THROUGH
THE FORECAST AREA ON SATURDAY. TIGHTENING SURFACE PRESSURE GRADIENTS
ACCOMPANYING THE COLD FRONT WILL PRODUCE BREEZY CONDITIONS BEGINNING
SOON AFTER DAYBREAK ON SATURDAY MORNING WITH BREEZY WINDS CONTINUING
THROUGH SATURDAY AFTERNOON. THE UPPER LEVEL TROUGH EXITS INTO
IDAHO/MONTANA SATURDAY AFTERNOON FOLLOWED BY A FLAT UPPER LEVEL
RIDGE OF HIGH PRESSURE BUILDING OVER THE PACIFIC NORTHWEST SATURDAY
NIGHT, WHICH WILL USHER IN A WARM FRONT AND ATTENDANT WARM AIR
OVERRUNNING RAIN FOR SATURDAY NIGHT, WHICH THEN PERSISTS THROUGH
SUNDAY AFTERNOON. AS THE RIDGE AMPLIFIES SUNDAY NIGHT AND MONDAY...
GEORGE WASHINGTON`S BIRTHDAY...SINKING AIR ASSOCIATED WITH THE RIDGE
WILL YIELD DRY CONDITIONS AT LOWER ELEVATIONS AND A LOW CHANCE OF
RAIN OVER THE HIGHER MOUNTAINS. MONDAY NIGHT AND TUESDAY THE RIDGE
WILL STILL BE OVER THE INTERIOR PACIFIC NORTHWEST FOR DRY CONDITIONS
IN CENTRAL OREGON AND EAST CENTRAL OREGON, BUT WITH A LOW CHANCE OF
RAIN IN THE MOUNTAINS ON TUESDAY.  POLAN


&&

.AVIATION...VFR CONDITIONS WILL BE CONTINUE THROUGH THIS EVENING.
THEN A STRENGTHENING INVERSION WILL TRAP AND INCREASE MOISTURE IN
THE BOUNDARY LAYER PRODUCING LOW CIGS AND FOG DUE TO INCREASING
AREAL COVERAGE OF LOW STRATUS AND FOG IN THE LOWER COLUMBIA BASIN
AND ADJACENT VALLEYS BEGINNING AROUND MIDNIGHT AND CONTINUING WELL
PAST DAYBREAK ON WEDNESDAY. AS SUCH CONDITIONS ARE EXPECTED TO
DETERIORATE AT KYKM, KPSC, KRDM AND KBDN BECOMING VLIFR AT KRDM AND
KBDN, WITH KPSC AND KYKM BECOMING LIFR.

I KEPT KDLS, KPDT AND KALW AT VFR FOR THE NEXT 24 HOURS, AS GUIDANCE
SHOWED DOWNSLOPE DRAINAGE WINDS YIELDING MIXING IN COMBINATION WITH
A DRIER BOUNDARY LAYER INITIALLY, THESE FACTORS SHOULD WORK AGAINST
FORMATION OF FOG AND LOW STRATUS CLOUDS AT THOSE TAF SITES TONIGHT.
IF VISIBILITY DOES LOWER TO 5-6SM WITH LOCALIZED MVFR CONDITIONS AT
KDLS, KPDT AND KALW, THESE SITES WILL BE AMENDED OR THEIR FORECAST
UPDATED WITH NEW SCHEDULED TAF ISSUANCES LATER TODAY IF MODEL
FORECAST GUIDANCE CHANGES.

SURFACE WINDS LESS THAN 10 KTS FOR THE NEXT 24 HOURS.  POLAN


&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  30  46  34  50 /   0   0   0  10
ALW  31  46  35  50 /   0   0   0  10
PSC  28  47  32  47 /   0   0   0  10
YKM  29  50  32  48 /   0   0  10  20
HRI  28  46  33  49 /   0   0   0  10
ELN  20  34  27  37 /   0   0  10  20
RDM  28  60  32  59 /   0   0   0  10
LGD  34  46  34  47 /   0   0   0   0
GCD  33  56  33  52 /   0   0   0  10
DLS  32  50  37  50 /   0   0  10  20

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR ORZ041-044-
     050-502-503-505-507-508-510.

WA...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR WAZ024-
     026>029-520-521.

&&

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

$$

91/99/99




000
FXUS66 KPDT 092244
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
143 PM PST TUE FEB 9 2016

.SHORT TERM...TONIGHT THROUGH FRIDAY...THE UPPER LEVEL RIDGE OVER
THE REGION IS BEGINNING TO WEAKEN AS WEATHER SYSTEMS OFF THE COAST
BUMP UP AGAINST IT. THE RIDGE WILL SLOWLY FLATTEN OVER THE NEXT
COUPLE OF DAYS ALLOWING A SOUTHWEST FLOW ALOFT TO BRING SOME
MOISTURE INTO THE REGION STARTING AS CLOUDS OVERNIGHT AND WEDNESDAY.
THERE WILL BE SOME LIGHT PRECIPITATION SPREADING INTO WESTERN
WASHINGTON AND OREGON ON WEDNESDAY EVENTUALLY REACHING THE
WASHINGTON CASCADES WEDNESDAY NIGHT AND THURSDAY. THE UPPER LEVEL
RIDGE WILL FINALLY BREAK DOWN ON FRIDAY ALLOWING A COLD FRONT TO
PUSH THROUGH THE FORECAST AREA FRIDAY INCREASING THE CHANCE OF
PRECIPITATION FOR THE ENTIRE AREA. SNOW LEVELS WILL REMAIN HIGH SO
EXPECTING MAINLY RAIN THROUGH FRIDAY.


.


.LONG TERM...FRIDAY NIGHT THROUGH TUESDAY...PRESSURE PATTERN ALOFT
ACROSS NORTHEAST PACIFIC AND THE PACIFIC NORTHWEST BECOMES VERY
PROGRESSIVE WITH A SERIES OF PACIFIC WEATHER SYSTEMS TRACKING
EASTWARD THROUGH THE REGION THROUGH THE PERIOD. AS SUCH SNOW LEVELS
WILL BE UNSEASONABLY HIGH RESULTING IN PRECIPITATION BEING IN THE
FORM OF RAIN EACH DAY. THE FIRST UPPER LEVEL TROUGH APPROACHES THE
CASCADES FRIDAY NIGHT AND THEN SWEEPS A STRONG COLD FRONT THROUGH
THE FORECAST AREA ON SATURDAY. TIGHTENING SURFACE PRESSURE GRADIENTS
ACCOMPANYING THE COLD FRONT WILL PRODUCE BREEZY CONDITIONS BEGINNING
SOON AFTER DAYBREAK ON SATURDAY MORNING WITH BREEZY WINDS CONTINUING
THROUGH SATURDAY AFTERNOON. THE UPPER LEVEL TROUGH EXITS INTO
IDAHO/MONTANA SATURDAY AFTERNOON FOLLOWED BY A FLAT UPPER LEVEL
RIDGE OF HIGH PRESSURE BUILDING OVER THE PACIFIC NORTHWEST SATURDAY
NIGHT, WHICH WILL USHER IN A WARM FRONT AND ATTENDANT WARM AIR
OVERRUNNING RAIN FOR SATURDAY NIGHT, WHICH THEN PERSISTS THROUGH
SUNDAY AFTERNOON. AS THE RIDGE AMPLIFIES SUNDAY NIGHT AND MONDAY...
GEORGE WASHINGTON`S BIRTHDAY...SINKING AIR ASSOCIATED WITH THE RIDGE
WILL YIELD DRY CONDITIONS AT LOWER ELEVATIONS AND A LOW CHANCE OF
RAIN OVER THE HIGHER MOUNTAINS. MONDAY NIGHT AND TUESDAY THE RIDGE
WILL STILL BE OVER THE INTERIOR PACIFIC NORTHWEST FOR DRY CONDITIONS
IN CENTRAL OREGON AND EAST CENTRAL OREGON, BUT WITH A LOW CHANCE OF
RAIN IN THE MOUNTAINS ON TUESDAY.  POLAN


&&

.AVIATION...VFR CONDITIONS WILL BE CONTINUE THROUGH THIS EVENING.
THEN A STRENGTHENING INVERSION WILL TRAP AND INCREASE MOISTURE IN
THE BOUNDARY LAYER PRODUCING LOW CIGS AND FOG DUE TO INCREASING
AREAL COVERAGE OF LOW STRATUS AND FOG IN THE LOWER COLUMBIA BASIN
AND ADJACENT VALLEYS BEGINNING AROUND MIDNIGHT AND CONTINUING WELL
PAST DAYBREAK ON WEDNESDAY. AS SUCH CONDITIONS ARE EXPECTED TO
DETERIORATE AT KYKM, KPSC, KRDM AND KBDN BECOMING VLIFR AT KRDM AND
KBDN, WITH KPSC AND KYKM BECOMING LIFR.

I KEPT KDLS, KPDT AND KALW AT VFR FOR THE NEXT 24 HOURS, AS GUIDANCE
SHOWED DOWNSLOPE DRAINAGE WINDS YIELDING MIXING IN COMBINATION WITH
A DRIER BOUNDARY LAYER INITIALLY, THESE FACTORS SHOULD WORK AGAINST
FORMATION OF FOG AND LOW STRATUS CLOUDS AT THOSE TAF SITES TONIGHT.
IF VISIBILITY DOES LOWER TO 5-6SM WITH LOCALIZED MVFR CONDITIONS AT
KDLS, KPDT AND KALW, THESE SITES WILL BE AMENDED OR THEIR FORECAST
UPDATED WITH NEW SCHEDULED TAF ISSUANCES LATER TODAY IF MODEL
FORECAST GUIDANCE CHANGES.

SURFACE WINDS LESS THAN 10 KTS FOR THE NEXT 24 HOURS.  POLAN


&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  30  46  34  50 /   0   0   0  10
ALW  31  46  35  50 /   0   0   0  10
PSC  28  47  32  47 /   0   0   0  10
YKM  29  50  32  48 /   0   0  10  20
HRI  28  46  33  49 /   0   0   0  10
ELN  20  34  27  37 /   0   0  10  20
RDM  28  60  32  59 /   0   0   0  10
LGD  34  46  34  47 /   0   0   0   0
GCD  33  56  33  52 /   0   0   0  10
DLS  32  50  37  50 /   0   0  10  20

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR ORZ041-044-
     050-502-503-505-507-508-510.

WA...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR WAZ024-
     026>029-520-521.

&&

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

$$

91/99/99





000
FXUS66 KPDT 091816 AAA
AFDPDT

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE PENDLETON OR
1015 AM PST TUE FEB 9 2016

UPDATED AVIATION DISCUSSION

.SHORT TERM...A PERSISTENT WEATHER PATTERN WILL CONTINUE AS A RIDGE
OF HIGH PRESSURE RESIDES OVER THE REGION. WILL AGAIN SEE SOME NEAR
RECORD HIGH TEMPERATURES TODAY IN THE HIGHER ELEVATIONS. MEANWHILE
AN INVERSION WILL KEEP TEMPERATURES COOLER IN THE LOWER ELEVATIONS
AND THERE WILL BE SOME PATCHY FOG AND LOW CLOUDS THIS MORNING WITH
MOST BURNING OFF BY AFTERNOON BUT WILL RETURN OVERNIGHT. ONLY MINOR
CHANGES MADE IN THE MORNING FORECAST UPDATE.

&&

.AVIATION...18Z TAFS...VFR CONDITIONS WILL BE CONTINUE THROUGH THIS
EVENING. THEN A STRENGTHENING INVERSION WILL TRAP AND INCREASE
MOISTURE IN THE BOUNDARY LAYER PRODUCING LOW CIGS AND FOG DUE TO
INCREASING AREAL COVERAGE OF LOW STRATUS AND FOG IN THE LOWER
COLUMBIA BASIN AND ADJACENT VALLEYS BEGINNING AROUND MIDNIGHT AND
CONTINUING WELL PAST DAYBREAK ON WEDNESDAY. AS SUCH CONDITIONS ARE
EXPECTED TO DETERIORATE AT KYKM, KPSC, KRDM AND KBDN BECOMING VLIFR
AT KRDM AND KBDN, WITH KPSC AND KYKM BECOMING LIFR.

I KEPT KDLS, KPDT AND KALW AT VFR FOR THE NEXT 24 HOURS, AS GUIDANCE
SHOWED DOWNSLOPE DRAINAGE WINDS YIELDING MIXING IN COMBINATION WITH
A DRIER BOUNDARY LAYER INITIALLY, THESE FACTORS SHOULD WORK AGAINST
FORMATION OF FOG AND LOW STRATUS CLOUDS AT THOSE TAF SITES TONIGHT.
IF VISIBILITY DOES LOWER TO 5-6SM WITH LOCALIZED MVFR CONDITIONS AT
KDLS, KPDT AND KALW, THESE SITES WILL BE AMENDED OR THEIR FORECAST
UPDATED WITH NEW SCHEDULED TAF ISSUANCES LATER TODAY IF MODEL
FORECAST GUIDANCE CHANGES.

SURFACE WINDS LESS THAN 10 KTS FOR THE NEXT 24 HOURS.  POLAN

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  48  30  51  36 /   0   0   0  10
ALW  48  31  50  38 /   0   0   0  10
PSC  50  28  50  34 /   0   0   0  10
YKM  52  29  48  34 /   0   0   0  10
HRI  48  28  50  35 /   0   0   0  10
ELN  39  20  46  32 /   0   0   0  10
RDM  65  28  58  36 /   0   0   0  10
LGD  49  34  48  35 /   0   0   0  10
GCD  60  33  54  30 /   0   0   0  10
DLS  54  32  54  40 /   0   0   0  10

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR ORZ041-044-
     050-502-503-505-507-508-510.

WA...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR WAZ024-
     026>029-520-521.

&&

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

$$

91/99/99





000
FXUS66 KPDT 091816 AAA
AFDPDT

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE PENDLETON OR
1015 AM PST TUE FEB 9 2016

UPDATED AVIATION DISCUSSION

.SHORT TERM...A PERSISTENT WEATHER PATTERN WILL CONTINUE AS A RIDGE
OF HIGH PRESSURE RESIDES OVER THE REGION. WILL AGAIN SEE SOME NEAR
RECORD HIGH TEMPERATURES TODAY IN THE HIGHER ELEVATIONS. MEANWHILE
AN INVERSION WILL KEEP TEMPERATURES COOLER IN THE LOWER ELEVATIONS
AND THERE WILL BE SOME PATCHY FOG AND LOW CLOUDS THIS MORNING WITH
MOST BURNING OFF BY AFTERNOON BUT WILL RETURN OVERNIGHT. ONLY MINOR
CHANGES MADE IN THE MORNING FORECAST UPDATE.

&&

.AVIATION...18Z TAFS...VFR CONDITIONS WILL BE CONTINUE THROUGH THIS
EVENING. THEN A STRENGTHENING INVERSION WILL TRAP AND INCREASE
MOISTURE IN THE BOUNDARY LAYER PRODUCING LOW CIGS AND FOG DUE TO
INCREASING AREAL COVERAGE OF LOW STRATUS AND FOG IN THE LOWER
COLUMBIA BASIN AND ADJACENT VALLEYS BEGINNING AROUND MIDNIGHT AND
CONTINUING WELL PAST DAYBREAK ON WEDNESDAY. AS SUCH CONDITIONS ARE
EXPECTED TO DETERIORATE AT KYKM, KPSC, KRDM AND KBDN BECOMING VLIFR
AT KRDM AND KBDN, WITH KPSC AND KYKM BECOMING LIFR.

I KEPT KDLS, KPDT AND KALW AT VFR FOR THE NEXT 24 HOURS, AS GUIDANCE
SHOWED DOWNSLOPE DRAINAGE WINDS YIELDING MIXING IN COMBINATION WITH
A DRIER BOUNDARY LAYER INITIALLY, THESE FACTORS SHOULD WORK AGAINST
FORMATION OF FOG AND LOW STRATUS CLOUDS AT THOSE TAF SITES TONIGHT.
IF VISIBILITY DOES LOWER TO 5-6SM WITH LOCALIZED MVFR CONDITIONS AT
KDLS, KPDT AND KALW, THESE SITES WILL BE AMENDED OR THEIR FORECAST
UPDATED WITH NEW SCHEDULED TAF ISSUANCES LATER TODAY IF MODEL
FORECAST GUIDANCE CHANGES.

SURFACE WINDS LESS THAN 10 KTS FOR THE NEXT 24 HOURS.  POLAN

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  48  30  51  36 /   0   0   0  10
ALW  48  31  50  38 /   0   0   0  10
PSC  50  28  50  34 /   0   0   0  10
YKM  52  29  48  34 /   0   0   0  10
HRI  48  28  50  35 /   0   0   0  10
ELN  39  20  46  32 /   0   0   0  10
RDM  65  28  58  36 /   0   0   0  10
LGD  49  34  48  35 /   0   0   0  10
GCD  60  33  54  30 /   0   0   0  10
DLS  54  32  54  40 /   0   0   0  10

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR ORZ041-044-
     050-502-503-505-507-508-510.

WA...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR WAZ024-
     026>029-520-521.

&&

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

$$

91/99/99




000
FXUS66 KPDT 091816 AAA
AFDPDT

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE PENDLETON OR
1015 AM PST TUE FEB 9 2016

UPDATED AVIATION DISCUSSION

.SHORT TERM...A PERSISTENT WEATHER PATTERN WILL CONTINUE AS A RIDGE
OF HIGH PRESSURE RESIDES OVER THE REGION. WILL AGAIN SEE SOME NEAR
RECORD HIGH TEMPERATURES TODAY IN THE HIGHER ELEVATIONS. MEANWHILE
AN INVERSION WILL KEEP TEMPERATURES COOLER IN THE LOWER ELEVATIONS
AND THERE WILL BE SOME PATCHY FOG AND LOW CLOUDS THIS MORNING WITH
MOST BURNING OFF BY AFTERNOON BUT WILL RETURN OVERNIGHT. ONLY MINOR
CHANGES MADE IN THE MORNING FORECAST UPDATE.

&&

.AVIATION...18Z TAFS...VFR CONDITIONS WILL BE CONTINUE THROUGH THIS
EVENING. THEN A STRENGTHENING INVERSION WILL TRAP AND INCREASE
MOISTURE IN THE BOUNDARY LAYER PRODUCING LOW CIGS AND FOG DUE TO
INCREASING AREAL COVERAGE OF LOW STRATUS AND FOG IN THE LOWER
COLUMBIA BASIN AND ADJACENT VALLEYS BEGINNING AROUND MIDNIGHT AND
CONTINUING WELL PAST DAYBREAK ON WEDNESDAY. AS SUCH CONDITIONS ARE
EXPECTED TO DETERIORATE AT KYKM, KPSC, KRDM AND KBDN BECOMING VLIFR
AT KRDM AND KBDN, WITH KPSC AND KYKM BECOMING LIFR.

I KEPT KDLS, KPDT AND KALW AT VFR FOR THE NEXT 24 HOURS, AS GUIDANCE
SHOWED DOWNSLOPE DRAINAGE WINDS YIELDING MIXING IN COMBINATION WITH
A DRIER BOUNDARY LAYER INITIALLY, THESE FACTORS SHOULD WORK AGAINST
FORMATION OF FOG AND LOW STRATUS CLOUDS AT THOSE TAF SITES TONIGHT.
IF VISIBILITY DOES LOWER TO 5-6SM WITH LOCALIZED MVFR CONDITIONS AT
KDLS, KPDT AND KALW, THESE SITES WILL BE AMENDED OR THEIR FORECAST
UPDATED WITH NEW SCHEDULED TAF ISSUANCES LATER TODAY IF MODEL
FORECAST GUIDANCE CHANGES.

SURFACE WINDS LESS THAN 10 KTS FOR THE NEXT 24 HOURS.  POLAN

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  48  30  51  36 /   0   0   0  10
ALW  48  31  50  38 /   0   0   0  10
PSC  50  28  50  34 /   0   0   0  10
YKM  52  29  48  34 /   0   0   0  10
HRI  48  28  50  35 /   0   0   0  10
ELN  39  20  46  32 /   0   0   0  10
RDM  65  28  58  36 /   0   0   0  10
LGD  49  34  48  35 /   0   0   0  10
GCD  60  33  54  30 /   0   0   0  10
DLS  54  32  54  40 /   0   0   0  10

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR ORZ041-044-
     050-502-503-505-507-508-510.

WA...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR WAZ024-
     026>029-520-521.

&&

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

$$

91/99/99





000
FXUS66 KPDT 091600
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
759 AM PST TUE FEB 9 2016

.SHORT TERM...A PERSISTENT WEATHER PATTERN WILL CONTINUE AS A RIDGE
OF HIGH PRESSURE RESIDES OVER THE REGION. WILL AGAIN SEE SOME NEAR
RECORD HIGH TEMPERATURES TODAY IN THE HIGHER ELEVATIONS. MEANWHILE
AN INVERSION WILL KEEP TEMPERATURES COOLER IN THE LOWER ELEVATIONS
AND THERE WILL BE SOME PATCHY FOG AND LOW CLOUDS THIS MORNING WITH
MOST BURNING OFF BY AFTERNOON BUT WILL RETURN OVERNIGHT. ONLY MINOR
CHANGES MADE IN THE MORNING FORECAST UPDATE.


&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  48  30  51  36 /   0   0   0  10
ALW  48  31  50  38 /   0   0   0  10
PSC  50  28  50  34 /   0   0   0  10
YKM  52  29  48  34 /   0   0   0  10
HRI  48  28  50  35 /   0   0   0  10
ELN  39  20  46  32 /   0   0   0  10
RDM  65  28  58  36 /   0   0   0  10
LGD  49  34  48  35 /   0   0   0  10
GCD  60  33  54  30 /   0   0   0  10
DLS  54  32  54  40 /   0   0   0  10

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR ORZ041-044-
     050-502-503-505-507-508-510.

WA...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR WAZ024-
     026>029-520-521.

&&

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

$$

91/99/99





000
FXUS66 KPDT 091049
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
249 AM PST TUE FEB 9 2016

.SHORT TERM...TODAY THROUGH THURSDAY. LARGE UPPER LEVEL RIDGE
CONTINUES OVER THE REGION TODAY. CURRENT SATELLITE IMAGERY AND
OBSERVATIONS INDICATING FOG IS VERY LIMITED AT THIS POINT.
COVERAGE WILL LIKELY EXPAND SOME FOR THE REMAINDER OF THE NIGHT
AND INTO THE MORNING. OTHERWISE EXPECTING MOST LOCATIONS TO HAVE
SUNNY SKIES TODAY. TEMPERATURES WILL BE SIMILAR TO YESTERDAY WITH
50S TO LOWER 60S. LOW LEVEL INVERSIONS WILL KEEP THE COLUMBIA
BASIN AND ADJACENT VALLEYS A LITTLE COOLER WITH UPPER 40S TO
LOWER 50S FOR THE MOST PART. BREEZY SOUTH WINDS IN THE GRANDE
RONDE VALLEY OTHERWISE WINDS WILL BE FAIRLY LIGHT TODAY. THE RIDGE
AXIS MOVES OFF TO THE EAST WEDNESDAY AS A WEAKENING FRONTAL
BOUNDARY MOVES THROUGH THE PACIFIC NORTHWEST. PRECIPITATION WILL
BE LIMITED TO A FEW SHOWERS OVER THE WASHINGTON CASCADES. MAIN
IMPACT OF THE FRONT WILL BE INCREASING MID AND HIGH LEVEL CLOUDS.
ANOTHER SYSTEM WILL PASS THROUGH THE REGION THURSDAY AS A WEAK
WARM FRONT. THIS WILL KEEP SKIES MOSTLY CLOUDY. SOME LIGHT RAIN
LIKELY MAINLY OVER THE CASCADES. TEMPERATURES WILL REMAIN MILD
WEDNESDAY AND THURSDAY. 94

.LONG TERM...THURSDAY NIGHT THROUGH TUESDAY...AN APPROACHING WEATHER
SYSTEM WILL WEAKEN THE UPPER LEVEL RIDGE.  MOISTURE WILL BEGIN TO
MOVE IN ALONG THE EAST SLOPES OF THE WASHINGTON CASCADES AND
THURSDAY EVENING...AND GRADUALLY WORK SOUTHEAST ACROSS THE CWA
THROUGH FRIDAY NIGHT.  BY FRIDAY EVENING ALL AREAS WILL BE UNDER A
CHANCE OF RAIN...WITH HIGHER PROBABILITIES ALONG THE MOUNTAINS. THIS
WILL STILL BE A FAIRLY MILD SYSTEM...AND SNOW LEVELS WILL GRADUALLY
DROP TO ABOUT 6000 FT MSL BY SATURDAY.

A FAST MOVING OPEN TROUGH WITH A COLD FRONT ASSOCIATED WILL MOVE
ACROSS THE AREA ON SATURDAY...LOWERING THE SNOW LEVELS EVEN FURTHER.
SNOW LEVELS SHOULD BE AROUND 3500 FT MSL AFTER THE COLD FRONT
PASSES. SHORTLY AFTER THE FRONTAL PASSAGE THE RIDGE WILL ATTEMPT TO
REBUILD...BUT FOR NOW MODELS KEEP THE AREA UNDER A WESTERLY FLOW.
SNOW LEVELS WILL ONCE AGAIN INCREASE TO ABOUT 7000 FT MSL.

A 30-40KT JET AT 850 MB WILL CONTINUE WITH THIS WESTERLY FLOW SUNDAY
ONWARD.  WITH PROPER MIXING THESE WINDS COULD CREATE SOME BREEZY TO
WINDY CONDITIONS ACROSS THE LOWER ELEVATIONS SUNDAY THROUGH TUESDAY.

TEMPERATURES ARE EXPECTED TO BE MILD AND ABOVE NORMAL FOR THE
EXTENDED...WITH HIGHS IN THE MID 50S TO LOWER 60S ACROSS THE LOWER
ELEVATIONS AND IN THE MID 40S TO LOWER 50S MOUNTAINS. WEBER

&&

.AVIATION...12Z TAFS...VFR CONDITIONS WILL BE PREVALENT FOR THE NEXT
24 HOURS AT ALL TAF SITES. HOWEVER VISIBILITY COULD FALL TO 5-6SM
WITH LOCALIZED MVFR CONDITIONS AT COLUMBIA BASIN TAF SITES THROUGH
18Z. DUE TO LOW CONFIDENCE THESE SITES WILL BE AMENDED IF NEEDED.
OTHERWISE EXPECT JUST SOME HIGH CIRRUS AND SURFACE WINDS LESS THAN
10 KTS FOR THE NEXT 24 HOURS. WEBER

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  51  31  51  36 /   0   0   0  10
ALW  50  31  50  38 /   0   0   0  10
PSC  51  30  50  34 /   0   0   0  10
YKM  52  30  48  34 /   0   0   0  10
HRI  51  30  50  35 /   0   0   0  10
ELN  43  26  46  32 /   0   0   0  10
RDM  66  32  58  36 /   0   0   0  10
LGD  52  33  48  35 /   0   0   0  10
GCD  64  32  54  30 /   0   0   0  10
DLS  55  33  54  40 /   0   0   0  10

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR ORZ041-044-
     050-502-503-505-507-508-510.

WA...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR WAZ024-
     026>029-520-521.

&&

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

$$

94/89/89





000
FXUS66 KPDT 091049
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
249 AM PST TUE FEB 9 2016

.SHORT TERM...TODAY THROUGH THURSDAY. LARGE UPPER LEVEL RIDGE
CONTINUES OVER THE REGION TODAY. CURRENT SATELLITE IMAGERY AND
OBSERVATIONS INDICATING FOG IS VERY LIMITED AT THIS POINT.
COVERAGE WILL LIKELY EXPAND SOME FOR THE REMAINDER OF THE NIGHT
AND INTO THE MORNING. OTHERWISE EXPECTING MOST LOCATIONS TO HAVE
SUNNY SKIES TODAY. TEMPERATURES WILL BE SIMILAR TO YESTERDAY WITH
50S TO LOWER 60S. LOW LEVEL INVERSIONS WILL KEEP THE COLUMBIA
BASIN AND ADJACENT VALLEYS A LITTLE COOLER WITH UPPER 40S TO
LOWER 50S FOR THE MOST PART. BREEZY SOUTH WINDS IN THE GRANDE
RONDE VALLEY OTHERWISE WINDS WILL BE FAIRLY LIGHT TODAY. THE RIDGE
AXIS MOVES OFF TO THE EAST WEDNESDAY AS A WEAKENING FRONTAL
BOUNDARY MOVES THROUGH THE PACIFIC NORTHWEST. PRECIPITATION WILL
BE LIMITED TO A FEW SHOWERS OVER THE WASHINGTON CASCADES. MAIN
IMPACT OF THE FRONT WILL BE INCREASING MID AND HIGH LEVEL CLOUDS.
ANOTHER SYSTEM WILL PASS THROUGH THE REGION THURSDAY AS A WEAK
WARM FRONT. THIS WILL KEEP SKIES MOSTLY CLOUDY. SOME LIGHT RAIN
LIKELY MAINLY OVER THE CASCADES. TEMPERATURES WILL REMAIN MILD
WEDNESDAY AND THURSDAY. 94

.LONG TERM...THURSDAY NIGHT THROUGH TUESDAY...AN APPROACHING WEATHER
SYSTEM WILL WEAKEN THE UPPER LEVEL RIDGE.  MOISTURE WILL BEGIN TO
MOVE IN ALONG THE EAST SLOPES OF THE WASHINGTON CASCADES AND
THURSDAY EVENING...AND GRADUALLY WORK SOUTHEAST ACROSS THE CWA
THROUGH FRIDAY NIGHT.  BY FRIDAY EVENING ALL AREAS WILL BE UNDER A
CHANCE OF RAIN...WITH HIGHER PROBABILITIES ALONG THE MOUNTAINS. THIS
WILL STILL BE A FAIRLY MILD SYSTEM...AND SNOW LEVELS WILL GRADUALLY
DROP TO ABOUT 6000 FT MSL BY SATURDAY.

A FAST MOVING OPEN TROUGH WITH A COLD FRONT ASSOCIATED WILL MOVE
ACROSS THE AREA ON SATURDAY...LOWERING THE SNOW LEVELS EVEN FURTHER.
SNOW LEVELS SHOULD BE AROUND 3500 FT MSL AFTER THE COLD FRONT
PASSES. SHORTLY AFTER THE FRONTAL PASSAGE THE RIDGE WILL ATTEMPT TO
REBUILD...BUT FOR NOW MODELS KEEP THE AREA UNDER A WESTERLY FLOW.
SNOW LEVELS WILL ONCE AGAIN INCREASE TO ABOUT 7000 FT MSL.

A 30-40KT JET AT 850 MB WILL CONTINUE WITH THIS WESTERLY FLOW SUNDAY
ONWARD.  WITH PROPER MIXING THESE WINDS COULD CREATE SOME BREEZY TO
WINDY CONDITIONS ACROSS THE LOWER ELEVATIONS SUNDAY THROUGH TUESDAY.

TEMPERATURES ARE EXPECTED TO BE MILD AND ABOVE NORMAL FOR THE
EXTENDED...WITH HIGHS IN THE MID 50S TO LOWER 60S ACROSS THE LOWER
ELEVATIONS AND IN THE MID 40S TO LOWER 50S MOUNTAINS. WEBER

&&

.AVIATION...12Z TAFS...VFR CONDITIONS WILL BE PREVALENT FOR THE NEXT
24 HOURS AT ALL TAF SITES. HOWEVER VISIBILITY COULD FALL TO 5-6SM
WITH LOCALIZED MVFR CONDITIONS AT COLUMBIA BASIN TAF SITES THROUGH
18Z. DUE TO LOW CONFIDENCE THESE SITES WILL BE AMENDED IF NEEDED.
OTHERWISE EXPECT JUST SOME HIGH CIRRUS AND SURFACE WINDS LESS THAN
10 KTS FOR THE NEXT 24 HOURS. WEBER

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  51  31  51  36 /   0   0   0  10
ALW  50  31  50  38 /   0   0   0  10
PSC  51  30  50  34 /   0   0   0  10
YKM  52  30  48  34 /   0   0   0  10
HRI  51  30  50  35 /   0   0   0  10
ELN  43  26  46  32 /   0   0   0  10
RDM  66  32  58  36 /   0   0   0  10
LGD  52  33  48  35 /   0   0   0  10
GCD  64  32  54  30 /   0   0   0  10
DLS  55  33  54  40 /   0   0   0  10

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR ORZ041-044-
     050-502-503-505-507-508-510.

WA...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR WAZ024-
     026>029-520-521.

&&

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

$$

94/89/89




000
FXUS66 KPDT 091049
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
249 AM PST TUE FEB 9 2016

.SHORT TERM...TODAY THROUGH THURSDAY. LARGE UPPER LEVEL RIDGE
CONTINUES OVER THE REGION TODAY. CURRENT SATELLITE IMAGERY AND
OBSERVATIONS INDICATING FOG IS VERY LIMITED AT THIS POINT.
COVERAGE WILL LIKELY EXPAND SOME FOR THE REMAINDER OF THE NIGHT
AND INTO THE MORNING. OTHERWISE EXPECTING MOST LOCATIONS TO HAVE
SUNNY SKIES TODAY. TEMPERATURES WILL BE SIMILAR TO YESTERDAY WITH
50S TO LOWER 60S. LOW LEVEL INVERSIONS WILL KEEP THE COLUMBIA
BASIN AND ADJACENT VALLEYS A LITTLE COOLER WITH UPPER 40S TO
LOWER 50S FOR THE MOST PART. BREEZY SOUTH WINDS IN THE GRANDE
RONDE VALLEY OTHERWISE WINDS WILL BE FAIRLY LIGHT TODAY. THE RIDGE
AXIS MOVES OFF TO THE EAST WEDNESDAY AS A WEAKENING FRONTAL
BOUNDARY MOVES THROUGH THE PACIFIC NORTHWEST. PRECIPITATION WILL
BE LIMITED TO A FEW SHOWERS OVER THE WASHINGTON CASCADES. MAIN
IMPACT OF THE FRONT WILL BE INCREASING MID AND HIGH LEVEL CLOUDS.
ANOTHER SYSTEM WILL PASS THROUGH THE REGION THURSDAY AS A WEAK
WARM FRONT. THIS WILL KEEP SKIES MOSTLY CLOUDY. SOME LIGHT RAIN
LIKELY MAINLY OVER THE CASCADES. TEMPERATURES WILL REMAIN MILD
WEDNESDAY AND THURSDAY. 94

.LONG TERM...THURSDAY NIGHT THROUGH TUESDAY...AN APPROACHING WEATHER
SYSTEM WILL WEAKEN THE UPPER LEVEL RIDGE.  MOISTURE WILL BEGIN TO
MOVE IN ALONG THE EAST SLOPES OF THE WASHINGTON CASCADES AND
THURSDAY EVENING...AND GRADUALLY WORK SOUTHEAST ACROSS THE CWA
THROUGH FRIDAY NIGHT.  BY FRIDAY EVENING ALL AREAS WILL BE UNDER A
CHANCE OF RAIN...WITH HIGHER PROBABILITIES ALONG THE MOUNTAINS. THIS
WILL STILL BE A FAIRLY MILD SYSTEM...AND SNOW LEVELS WILL GRADUALLY
DROP TO ABOUT 6000 FT MSL BY SATURDAY.

A FAST MOVING OPEN TROUGH WITH A COLD FRONT ASSOCIATED WILL MOVE
ACROSS THE AREA ON SATURDAY...LOWERING THE SNOW LEVELS EVEN FURTHER.
SNOW LEVELS SHOULD BE AROUND 3500 FT MSL AFTER THE COLD FRONT
PASSES. SHORTLY AFTER THE FRONTAL PASSAGE THE RIDGE WILL ATTEMPT TO
REBUILD...BUT FOR NOW MODELS KEEP THE AREA UNDER A WESTERLY FLOW.
SNOW LEVELS WILL ONCE AGAIN INCREASE TO ABOUT 7000 FT MSL.

A 30-40KT JET AT 850 MB WILL CONTINUE WITH THIS WESTERLY FLOW SUNDAY
ONWARD.  WITH PROPER MIXING THESE WINDS COULD CREATE SOME BREEZY TO
WINDY CONDITIONS ACROSS THE LOWER ELEVATIONS SUNDAY THROUGH TUESDAY.

TEMPERATURES ARE EXPECTED TO BE MILD AND ABOVE NORMAL FOR THE
EXTENDED...WITH HIGHS IN THE MID 50S TO LOWER 60S ACROSS THE LOWER
ELEVATIONS AND IN THE MID 40S TO LOWER 50S MOUNTAINS. WEBER

&&

.AVIATION...12Z TAFS...VFR CONDITIONS WILL BE PREVALENT FOR THE NEXT
24 HOURS AT ALL TAF SITES. HOWEVER VISIBILITY COULD FALL TO 5-6SM
WITH LOCALIZED MVFR CONDITIONS AT COLUMBIA BASIN TAF SITES THROUGH
18Z. DUE TO LOW CONFIDENCE THESE SITES WILL BE AMENDED IF NEEDED.
OTHERWISE EXPECT JUST SOME HIGH CIRRUS AND SURFACE WINDS LESS THAN
10 KTS FOR THE NEXT 24 HOURS. WEBER

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  51  31  51  36 /   0   0   0  10
ALW  50  31  50  38 /   0   0   0  10
PSC  51  30  50  34 /   0   0   0  10
YKM  52  30  48  34 /   0   0   0  10
HRI  51  30  50  35 /   0   0   0  10
ELN  43  26  46  32 /   0   0   0  10
RDM  66  32  58  36 /   0   0   0  10
LGD  52  33  48  35 /   0   0   0  10
GCD  64  32  54  30 /   0   0   0  10
DLS  55  33  54  40 /   0   0   0  10

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR ORZ041-044-
     050-502-503-505-507-508-510.

WA...AIR STAGNATION ADVISORY UNTIL 10 AM PST SATURDAY FOR WAZ024-
     026>029-520-521.

&&

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

$$

94/89/89





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