Weather Service Report


768 
FXUS66 KPDT 012331 AAA
AFDPDT

AREA FORECAST DISCUSSION...UPDATE
NATIONAL WEATHER SERVICE PENDLETON OR
430 PM PDT WED OCT 1 2014

UPDATED AVIATION DISCUSSION

.SHORT TERM...TONIGHT THROUGH SATURDAY NIGHT. UPPER RIDGE OFFSHORE 
WITH A DRY NORTHWEST FLOW OVER THE REGION. SATELLITE SHOWING MAINLY 
CLEAR SKIES THIS AFTERNOON EXCEPT FOR SOME STRATOCUMULUS OVER THE 
NORTHEAST OREGON MOUNTAINS. THIS WILL DISSIPATE AT SUNSET. EXPECT 
SOME THIN CIRRUS TO MOVE THROUGH OVERNIGHT OTHERWISE MAINLY CLEAR 
AND COLD. LESS WIND AND A DRIER AIRMASS SHOULD ALLOW FOR SLIGHTLY 
COOLER TEMPERATURES THAN LAST NIGHT. PARTS OF CENTRAL AND NORTHEAST 
OREGON WILL DROP BELOW FREEZING. WILL CONTINUE TO HAVE THIN CIRRUS 
MOVING THROUGH IN THE NORTHWEST FLOW ALOFT THURSDAY FOR A MOSTLY 
SUNNY DAY. THE UPPER RIDGE BUILDS OVER THE REGION FRIDAY WITH WARMER 
TEMPERATURES. THIS ALSO PUSHES THE HIGH LEVEL CLOUDS NORTHWARD 
TOWARD BC. MODELS SHOW A WEAK DISTURBANCE MOVING THROUGH THE RIDGE 
SATURDAY. WILL FORECAST PARTLY CLOUDY SKIES AND CONTINUED MILD 
DAYTIME TEMPERATURES.  94

.LONG TERM...SUNDAY THROUGH WEDNESDAY...THE EXTENDED PERIOD STARTS 
OFF WITH A STRONG UPPER LEVEL RIDGE FIRMLY IN PLACE OVER THE WESTERN 
UNITED STATES...OUR AREA WILL SEE THE WARMEST 850MB TEMPERATURES 
MONDAY AFTERNOON...WITH SOUTHERN PORTIONS OF THE CWA REACHING 25 
DEGREES CELSIUS. THIS WILL LEAD TO DRY AND WARM WEATHER WITH 
TEMPERATURES FORECAST TO BE 8 TO 12 DEGREES ABOVE AVERAGE SUNDAY 
THROUGH TUESDAY. AS THE UPPER LEVEL RIDGE GRADUALLY BREAKS DOWN AND 
THE FLOW TURNS MORE WEST-NORTHWESTERLY WE WILL INTRODUCE A SLIGHT 
CHANCE OF RAIN SHOWERS OVER THE EAST SLOPES OF THE WASHINGTON 
CASCADES BEGINNING MONDAY NIGHT INTO TUESDAY EVENING. A 
WEAK...MOISTURE STARVED DISTURBANCE THEN MOVES UNDER THE BLOCKING 
RIDGE BY TUESDAY NIGHT AND WEDNESDAY INTO NORTHERN CALIFORNIA. BY 
WEDNESDAY 850MB TEMPERATURES FALL BACK TO THE 8-16 DEGREES CELSIUS 
RANGE...WHICH WILL ALLOW SURFACES TEMPERATURES TO RUN MUCH CLOSER TO 
SEASONAL AVERAGES. 77/98

&&

.AVIATION...00Z TAFS...AN UPPER LEVEL RIDGE OVER THE AREA WILL LEAD 
TO VFR CONDITIONS AT ALL TAF SITES THROUGH THE PERIOD. WINDS WILL 
REMAIN SLIGHTLY GUSTY AT KDLS AND KPDT...UP TO 15-20 KTS THROUGH 04Z 
BEFORE DIMINISHING OVERNIGHT. OTHERWISE ALL OTHER TAF SITES WILL SEE 
LIGHT WINDS AOB 12KTS WITH JUST A FEW CLOUDS FROM 12000 TO 25000 
FEET AGL. 77

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  42  68  39  74 /   0   0   0   0 
ALW  45  69  44  74 /   0   0   0   0 
PSC  39  70  39  75 /   0   0   0   0 
YKM  37  66  36  71 /   0   0   0   0 
HRI  40  71  38  75 /   0   0   0   0 
ELN  40  66  36  74 /   0   0   0   0 
RDM  30  68  30  78 /   0   0   0   0 
LGD  39  65  36  75 /   0   0   0   0 
GCD  36  70  36  78 /   0   0   0   0 
DLS  45  72  44  78 /   0   0   0   0 

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...FREEZE WARNING FROM 2 AM TO 9 AM PDT THURSDAY ORZ511.

WA...NONE.
&&

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

$$

94/77/77




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