Weather Service Report


223 
FXUS66 KPDT 262253 AAA
AFDPDT

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE PENDLETON OR
353 PM PDT THU MAR 26 2015

.SHORT TERM...TONIGHT THROUGH SUNDAY. TEMPERATURES ARE CLIMBING INTO 
THE 60S TO LOWER 70S THROUGHOUT THE REGION THIS AFTERNOON.  THESE 
TEMPERATURES ARE ABOUT 10-15 DEGREES ABOVE NORMAL...AND THERE WILL 
LIKELY BE A FEW RECORD HIGHS REPORTED BY THE END OF THE AFTERNOON.  
FRIDAY WILL BE ANOTHER DAY OF NEAR RECORD HIGH TEMPERATURES.  IN 
FACT...TEMPERATURES ON FRIDAY WILL BE AT LEAST SEVERAL DEGREES ABOVE 
TODAY'S.  SKIES WILL BE MOSTLY CLEAR TONIGHT THROUGH FRIDAY MORNING 
BUT THERE WILL BE INCREASING MID LEVEL CLOUDS FRIDAY AFTERNOON AHEAD 
OF A SHORTWAVE TROUGH OFFSHORE.  MODELS CONTINUE TO ADVERTISE 
INSTABILITY OVER CENTRAL AND NE OREGON...SO WILL KEEP A SLIGHT 
CHANCE OF AFTN/EVE THUNDERSTORMS.  ANY THUNDERSTORMS THAT DEVELOP 
SHOULD BE WEAK AND DIURNALLY DRIVEN...AND I DO NOT ANTICIPATE MUCH 
RAINFALL WITH MOST STORMS.  A COLD FRONT WILL QUICKLY ZIP ACROSS 
WASHINGTON AND OREGON FRIDAY NIGHT AND EARLY SATURDAY MORNING.  THE 
MAIN IMPACT WITH THE FRONT WILL BE INCREASING WINDS...AND THERE WILL 
BE AREAS RECEIVING GUSTS AROUND 30-40 MPH FRIDAY NIGHT.  SHOWERS 
WILL TAPER OFF AND WINDS WILL DECREASE SATURDAY MORNING. IT LOOKS 
LIKE A BENIGN WEEKEND AS THE REGION REMAINS UNDER A FLAT UPPER LEVEL 
RIDGE.  THERE WILL BE OCCASIONAL MID AND HIGH LEVEL CLOUDS...LOCALLY 
BREEZY WINDS...AFTERNOON TEMPERATURES IN THE MID 50S TO UPPER 
60S...AND OVERNIGHT LOWS IN THE 30S TO LOWER 40S.  WISTER

.LONG TERM...SUNDAY NIGHT THROUGH THURSDAY...AN UPPER LEVEL RIDGE 
WILL MOVE THROUGH EASTERN WASHINGTON AND OREGON SUNDAY NIGHT. MONDAY 
THE UPPER LEVEL FLOW WILL BECOME SOUTHWEST MONDAY AS A TROUGH AND 
ASSOCIATED FRONT MOVES TOWARD THE WEST COAST. THIS SYSTEM WILL BRING 
SOME COLDER AIR BACK IN TO THE AREA WITH SNOW LEVELS LOWERING TO 
3500-4000 FEET BY TUESDAY MORNING WITH SOME LINGERING SHOWERS IN THE 
MOUNTAINS. ANOTHER SYSTEM WILL MOVE THROUGH WEDNESDAY WITH A 
REINFORCING SHOT OF COLD AIR. THESE SYSTEMS WILL BRING A CHANCE OF 
RAIN, SOME COLDER AIR WITH LOWERING SNOW LEVELS, AND BREEZY TO WINDY 
CONDITIONS AT TIMES MONDAY NIGHT THROUGH WEDNESDAY. 

MODEL DIVERGE THURSDAY WITH THE GFS DIGGING A TROUGH INTO MONTANA 
AND RIDGING ALONG THE COAST WHILE THE ECMWF DIGS THE TROUGH INTO 
WESTERN WASHINGTON AND OREGON. WITH CONFIDENCE LOW DUE TO 
DIFFERENCES IN TROUGH PLACEMENT DID NOT CHANGE EXISTING FORECAST OF 
MOUNTAIN SNOW SHOWERS THURSDAY.  

TEMPERATURES WILL BE ABOVE NORMAL THROUGH MONDAY AND THEN COOL TO 
NEAR SEASONAL LEVELS BY WEDNESDAY.  COONFIELD

&&

.AVIATION...0Z TAFS...VFR CONDITIONS WILL MAINLY PREVAIL FOR THE 
NEXT 24 HOURS. STRATUS WILL REDEVELOP AT KDLS TOMORROW MORNING BUT 
NOT BE AS THICK AND DISSIPATE EARLIER.  OTHERWISE EXPECT VARIABLE 
CIRRUS CIGS 20000 FT AGL AND ABOVE. WINDS ARE EXPECTED TO BE LESS 
THAN 10 KNOTS THROUGH THE PERIOD. 76

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  48  73  48  64 /   0  10  40  20 
ALW  52  74  52  66 /   0   0  40  20 
PSC  47  73  49  68 /   0   0  20  10 
YKM  45  72  43  66 /   0  10  20  10 
HRI  47  74  48  67 /   0   0  20  10 
ELN  44  71  43  64 /   0  10  20  10 
RDM  38  72  37  62 /   0  10  30  10 
LGD  44  70  43  61 /   0  10  40  20 
GCD  45  72  45  61 /   0  10  20  20 
DLS  49  73  49  67 /   0  10  30  10 

&&

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

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

$$

85/76/76




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