FXUS66 KPDT 201734
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OREGON
930 AM PST SAT NOV 20 2004

.SHORT TERM...A WEAK WEATHER DISTURBANCE IS MOVING DOWN IN A 
NORTHERLY FLOW ACROSS SOUTHEAST WASHINGTON AND NORTHEAST OREGON THIS 
MORNING. THIS HAS BROUGHT SOME LIGHT SNOW TO THE WALLOWA MOUNTAINS 
AND ADJACENT VALLEYS NORTH OF THE MOUNTAINS. THIS SYSTEM IS MOVING 
OUT AND EXPECT THE SNOW TO END BY LATE MORNING WITH ONLY LIGHT 
ACCUMULATIONS. FORECAST HAS BEEN UPDATED TO REFLECT THIS WEATHER 
DISTURBANCE. HIGH PRESSURE ALOFT WILL THEN BUILD OVER THE FORECAST 
AREA TONIGHT AND SUNDAY. HOWEVER THE AXIS OF THE HIGH PRESSURE RIDGE 
WILL STAY TO THE WEST KEEPING THE FORECAST AREA ON THE COLD SIDE 
WITH A NORTHERLY FLOW ALOFT. A COLD FRONT WILL MOVE DOWN OUT OF 
BRITISH COLUMBIA AND THE GULF OF ALASKA SUNDAY NIGHT INTO MONDAY. AT 
THIS TIME SNOW LEVELS LOOK TO BE QUITE LOW AND THERE COULD BE SOME 
LIGHT SNOW IN MANY AREAS...MAINLY ABOVE 2000-2500 FEET. DO NOT 
EXPECT ANY ADVISORY AMOUNTS AT THIS TIME. THERE WILL BE SOME WARMING 
AHEAD OF THIS COLD FRONT...BUT THERE WILL BE EXISTING SURFACE BASED 
INVERSIONS IN THE COLUMBIA BASIN WITH WARMER AIR MOVING IN ABOVE IT. 
AS SUCH THIS COULD RESULT IN SOME FREEZING RAIN OR SLEET INSTEAD OF 
RAIN. WILL NEED TO KEEP A CLOSE EYE ON THIS...BUT RIGHT NOW ANY 
PRECIPITATION AMOUNTS LOOK TO BE VERY LIGHT AND INSIGNIFICANT. A 
COOL NORTHWEST FLOW ALOFT WILL THEN PERSIST AFTER THAT INTO THE 
EXTENDED PERIOD. 

&&

.PRELIMINARY POINT TEMPS/POPS...
PENDLETON (AIRPORT) 043 026 043 / 000 000 005 
WALLA WALLA         043 029 044 / 000 000 005 
TRI-CITIES          045 020 045 / 000 000 005 
YAKIMA              046 024 046 / 000 000 005 
HERMISTON           045 020 045 / 000 000 005 
ELLENSBURG          044 024 045 / 000 000 005 
REDMOND             041 013 044 / 000 000 000 
LA GRANDE           039 022 038 / 005 000 005 
JOHN DAY            039 018 041 / 005 000 000 
THE DALLES          047 031 047 / 000 000 005 
&&

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

$$
88