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000
FXUS66 KPDT 120240
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
739 PM PDT TUE MAR 11 2014

.SHORT TERM...TONIGHT AND WEDNESDAY...HIGH PRESSURE WILL CONTINUE
OVER THE REGION PROVIDING CLEAR SKIES AND LIGHT WINDS. A WEAK SYSTEM
WILL PASS OVER THE RIDGE ON WEDNESDAY BUT HAVE NO REAL IMPACT TO THE
FORECAST AREA. MADE MINOR ADJUSTMENTS TO SKY CONDITIONS TEMPERATURES
AND WINDS FOR TONIGHT AND WEDNESDAY IN AN EVENING FORECAST UPDATE.

&&

.PREV DISC... /ISSUED 323 PM PDT TUE MAR 11 2014/

SHORT TERM...TONIGHT THROUGH FRIDAY. HIGH PRESSURE WILL DOMINATE
THE AREAS WEATHER THROUGH MIDWEEK WITH MAINLY DRY CONDITIONS AND
NEAR NORMAL TEMPERATURES. HOWEVER A DISTURBANCE WILL NEAR THE PACNW
THURSDAY NIGHT AND FRIDAY AND SPREAD MID AND HIGH LEVEL CLOUDS INTO
THE AREA. SOME SHOWERS MAY DEVELOP ALONG THE WA/OR CASCADES TOWARD
FRIDAY MORNING AND THEN SPREAD INTO PORTIONS OF THE BASIN AND INTO
THE BLUE/WALLOWA MOUNTAINS FRIDAY. SNOW LEVELS WILL REMAIN HIGH
MOSTLY ABOVE 5K FEET INTO THE END OF THE WEEK.

LONG TERM...FRIDAY NIGHT THROUGH TUESDAY...FRIDAY NIGHT A FAST
MOVING SHORTWAVE WILL BE MOVING OVER THE RIDGE AND THROUGH OUR AREA.
IT WILL MOVE THROUGH THE AREA BY EARLY SATURDAY MORNING AND WILL
BRING A CHANCE OF RAIN SHOWERS TO THE CASCADES AND THE MOUNTAINS OF
NORTHEAST OREGON WITH THE REST OF THE AREA REMAINING DRY. BREEZY
WINDS WILL ACCOMPANY THE SYSTEM IN THE EVENING THEN DIE DOWN OVER
NIGHT. A RIDGE WILL REMAIN OVER THE AREA SATURDAY THROUGH SUNDAY.
ANOTHER SHORTWAVE WILL MOVE OVER THE RIDGE THOUGH THE MODELS
DISAGREE AS TO THE TIMING AND COURSE OF THIS SYSTEM. THE ECMWF
BRINGS THE SYSTEM THROUGH THE NORTHERN HALF OF THE AREA SATURDAY
AFTERNOON AND NIGHT WITH LIGHT RAIN MAINLY IN THE WASHINGTON
CASCADES AND THE NORTHEAST OREGON MOUNTAINS. THE GFS SENDS INTO
BRITISH COLUMBIA COAST. HAVE GONE WITH A SLIGHT CHANCE OF RAIN IN
THE WASHINGTON CASCADE CREST REGION AND DRY ELSEWHERE. SUNDAY NIGHT
A TROUGH WILL SAG DOWN OUT OF CANADA WITH COLDER AIR AND ANOTHER
WEAK SYSTEM WILL MOVE THROUGH WITH MORE LIGHT RAIN IN THE MOUNTAINS
OF THE NORTHERN HALF OF THE AREA MONDAY AND MONDAY EVENING. ON
TUESDAY MODELS BRING A CUTOFF LOW TO NORTHERN CALIFORNIA. THE GFS
KEEPS THE EFFECTS SOUTH OF US WHILE THE ECMWF BRINGS LIGHT RAIN TO
THE SOUTHERN FRINGES OF OUR AREA. HAVE KEPT THE FORECAST DRY FOR NOW
ASIDE FROM SOME LIGHT RAIN SHOWERS IN THE MOUNTAINS DUE TO THE
NORTHWESTERLY UPSLOPE FLOW. TEMPERATURES WILL BE MAINLY IN THE MID
50S TO MID 60S SATURDAY AND SUNDAY THEN COOL TO THE 50S AND LOWER
60S MONDAY AND TUESDAY. PERRY

AVIATION...00Z TAFS...HIGH PRESSURE AND A DRY AIR MASS OVER
THE AREA WILL LEAD TO GENERALLY CLEAR SKIES FOR THE NEXT 24 HOURS. A
FEW AFTERNOON CUMULUS AT 7-10K FEET AGL HAVE DEVELOPED OVER THE
MOUNTAINS NEAR KRDM, KBDN, KALW AND KPDT TODAY AND ARE EXPECTED DO
SO AGAIN TOMORROW AFTER 18Z. SURFACE WINDS WILL REMAIN BELOW 15 KTS
FOR THE NEXT 24 HOURS. PERRY

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  28  60  33  58 /   0   0   0   0
ALW  33  61  37  59 /   0   0   0   0
PSC  31  64  33  60 /   0   0   0   0
YKM  28  61  31  59 /   0   0   0   0
HRI  29  63  33  61 /   0   0   0   0
ELN  29  61  31  54 /   0   0   0   0
RDM  18  60  21  56 /   0   0   0   0
LGD  26  55  31  53 /   0   0   0   0
GCD  30  57  32  55 /   0   0   0   0
DLS  30  64  34  61 /   0   0   0   0

&&

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

THREAT INDEX
WEDNESDAY : GREEN
THURSDAY : GREEN
FRIDAY : GREEN

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

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

$$

91/76/76