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AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
105 AM PST FRI NOV 28 2014

.SHORT TERM...TODAY THROUGH SUNDAY...A COUPLE OF COLD FRONTS ARE 
EXPECTED TO MOVE ACROSS THE PACIFIC NORTHWEST DURING THE NEXT COUPLE 
OF DAYS. THE FIRST FRONT RUNS FROM EAST CENTRAL OREGON SOUTHWEST TO 
SOUTHWEST OREGON AT THIS TIME. THE MOISTURE ASSOCIATED WITH THIS 
FRONT IS SHOWN ON RADAR MOVING ACROSS CENTRAL AND NORTHEAST OREGON. 
MUCH OF THE PRECIPITATION IS NOT REACHING THE GROUND HOWEVER. THE 
GFS MODEL MERGES THIS COLD FRONT WITH THE NEXT ONE BY LATE THIS 
AFTERNOON. RAIN WILL PERSIST THROUGH SATURDAY...ESPECIALLY OVER 
OREGON...AND MIX WITH AND THEN CHANGE TO SNOW BY LATE SATURDAY. 
DRIER AND MUCH COLDER WILL FILTER SOUTHWARD OUT OF CANADA ON 
SATURDAY NIGHT INTO SUNDAY WITH HIGH TEMPERATURES ABOUT 25 TO 30 
DEGREES COOLER THAN TODAY. AN ARCTIC AIR MASS WILL MOVE INTO THE 
REGION AND CWA LATE SATURDAY NIGHT INTO SUNDAY. TEMPERATURES ON 
SUNDAY ARE EXPECTED TO REMAIN BELOW FREEZING CWA WIDE. VERY COLD BUT 
DRY CONDITIONS ARE EXPECTED TO PERSIST INTO THE EXTENDED PERIOD. 
WINDS WILL BE LOCALLY BREEZY AT TIMES THROUGH THE SHORT TERM 
PERIOD...BUT THE WIND SPEEDS WILL REMAIN BELOW ADVISORY SPEEDS. 88

.LONG TERM...SUNDAY NIGHT THROUGH THURSDAY...HAVE MADE FEW CHANGES 
TO THE EXTENDED FORECAST AS MODELS CONTINUE TO DISAGREE WITH THE 
AMOUNT OF MOISTURE MOVING NORTHWARD INTO THE AREA AS WELL AS THE 
TIMING. HAVE CONTINUED TO LEAN TOWARD THE EUROPEAN WITH MOISTURE 
MOVING NORTHWARD FROM CENTRAL OREGON SUNDAY NIGHT TO THE REST OF THE 
AREA BY MONDAY. SNOW LEVELS REMAIN LOW WITH MOST OF THE AREA SEEING 
SNOW. THE NEXT ROUND OF PRECIPITATION WILL BE ON WEDNESDAY WITH 
RISING SNOW LEVELS. THIS COULD LEAD TO SNOW TRANSITIONING TO RAIN 
DURING THE DAY. HOWEVER...IF THE COLD AIR IN THE LOWER ELEVATIONS 
REMAIN IN PLACE AS THE WARM AIR MOVES ALOFT...THERE COULD BE A 
POTENTIAL FOR BRIEF FREEZING RAIN. WILL CONTINUE TO MONITOR THE 
SITUATION. TEMPERATURES DURING THE PERIOD WILL BE BELOW NORMAL. DMH

&&

.AVIATION...06Z TAFS (PREVIOUS DISCUSSION). LIGHT RAIN SHOWERS WILL 
CONTINUE OVERNIGHT FROM CENTRAL OREGON NORTHWEST INTO SOUTHEAST 
WASHINGTON WITH GENERALLY VFR CONDITIONS AND GUSTY WINDS. THE 
FRONTAL SYSTEM WILL CONTINUE ACROSS THE AREA ON FRIDAY...WITH SOME 
RAIN SHADOWING EAST OF THE CASCADES FOR KYKM AND KPSC. WINDS WILL BE 
SOUTHWEST 5-20 KTS OVERNIGHT AND WILL INCREASE 15-25 KTS REGION WIDE 
ON FRIDAY. 

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  63  35  34  14 /  60  80  50  20 
ALW  62  37  36  16 /  70  80  50  20 
PSC  59  35  37  17 /  30  50  20  10 
YKM  53  32  31  12 /  30  30  20   0 
HRI  59  36  37  15 /  40  60  20  10 
ELN  50  28  27  12 /  40  40  20   0 
RDM  55  34  33   8 /  50  70  50  20 
LGD  51  38  39  12 /  70  80  70  30 
GCD  52  35  34  11 /  60  60  70  30 
DLS  54  36  37  23 /  60  70  20  10 

&&

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

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

$$

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