Area Forecast Discussion
Issued by NWS Pendleton, OR

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000
FXUS66 KPDT 212118
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
230 PM PDT TUE OCT 21 2014

.SHORT TERM...TONIGHT THROUGH FRIDAY. WEAK LOW LEVEL INSTABILITY
OVER THE AREA THIS AFTERNOON WITH SCATTERED CUMULUS. THIS SHOULD
DIMINISH BY SUNSET. A LARGE UPPER LEVEL LOW AND STRONG JET WILL
IMPACT THE PACIFIC NORTHWEST FOR THE NEXT FEW DAYS. WATER VAPOR
SATELLITE SHOWING MOISTURE PLUME ENHANCING OFFSHORE. THIS WILL
SPREAD CLOUDS ACROSS THE REGION TONIGHT WITH RAIN INTO THE
WASHINGTON CASCADES. FOR WEDNESDAY THE STRONG SOUTHWEST FLOW
COMBINED WITH DEEP MOISTURE WILL BRING HEAVY RAIN TO THE CASCADES.
LIGHTER RAIN EXPECTED FURTHER EAST FROM THE CASCADES. THE FRONTAL
BOUNDARY AND STEADY RAIN WILL MOVE SOUTHEAST ACROSS THE FORECAST
AREA WEDNESDAY NIGHT. THE PRECIPITATION WILL DECREASE THURSDAY WITH
SKIES REMAINING CLOUDY. A STRONG LOW PRESSURE SYSTEM WILL THEN MOVE
NORTHWARD ALONG THE COAST FRIDAY PUSHING THE BOUNDARY BACK ACROSS
THE AREA AS A WARM FRONT. THIS WILL BRING ANOTHER PERIOD OF RAIN.
HIGH TEMPS OVER THE NEXT SEVERAL DAYS WILL REMAIN IN THE 50S AND
60S. WITH THE ACTIVE WEATHER PATTERN WINDS WILL BECOME BREEZY AT
TIMES WITH WEDNESDAY AND WEDNESDAY NIGHT HAVING THE STRONGEST WINDS.
94

.LONG TERM...FRIDAY NIGHT THROUGH TUESDAY...A WARM FRONT WILL PUSH
THROUGH THE AREA FRIDAY NIGHT WITH A SWATH OF RAIN THAT WILL MOVE UP
FROM THE SOUTH...CLEARING NORTHEAST OREGON BY SATURDAY MORNING.
SOUTHERLY WINDS WILL ALSO INCREASE DURING THIS TIME ACROSS CENTRAL
AND NORTHEAST OREGON. BREEZY TO WINDY CONDITIONS WILL PERSIST
THROUGH SATURDAY AS THE COLD FRONT MOVES IN FROM THE WEST. MOUNTAIN
SHOWERS WILL THEN LINGER THROUGH SUNDAY WITH THE UPPER LEVEL TROUGH
MOVING OVER THE REGION. THERE WILL BE A BREAK IN ACTIVITY SUNDAY
NIGHT...BUT ANOTHER WEATHER SYSTEM WILL BEGIN IMPACTING THE AREA
MONDAY AFTERNOON. THIS DISTURBANCE WILL BRING MORE RAIN AS WELL AS
BREEZY WINDS GOING INTO TUESDAY. TEMPERATURES WILL REMAIN MILD FOR
THIS TIME OF YEAR WITH SNOW LEVELS GENERALLY ABOVE 5000 FEET.  COBB

&&

.AVIATION...PREVIOUS DISCUSSION...18Z TAFS...VFR CONDITIONS SHOULD
PREVAIL NEXT 24 HOURS...BUT MID AND HIGH CLOUDS CAN BE EXPECTED.
CLOUDS WILL THICKEN AND LOWER OVERNIGHT WITH NEXT WEATHER SYSTEM.
RAIN COULD ARRIVE AT KBDN...KDLS AND KYKM BY WEDNESDAY MORNING.
WINDS WILL GENERALLY REMAIN BELOW 12 KTS...EXCEPT FOR GUSTY SOUTH
WINDS AT KBDN.  82

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  45  68  50  62 /  10  20  60  50
ALW  48  67  50  62 /  10  20  60  60
PSC  48  65  51  64 /  10  30  60  30
YKM  45  58  43  59 /  40  80  80  30
HRI  44  65  48  64 /  10  20  70  30
ELN  45  58  43  59 /  60  90  90  30
RDM  41  64  45  58 /  10  50  70  40
LGD  40  64  48  58 /  20  20  60  50
GCD  39  64  45  59 /  10  20  60  50
DLS  48  59  48  61 /  30  70  90  50

&&

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

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

$$

94/82/82





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