Area Forecast Discussion
Issued by NWS Pendleton, OR

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FXUS66 KPDT 280905
AFDPDT

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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