FXUS66 KPDT 270322
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OREGON
830 PM PDT SUN SEP 26 2004

.SHORT TERM...ISOLATED THUNDERSTORMS THAT DEVELOPED OVER CROOK AND 
GRANT COUNTIES HAVE DISSIPATED...AND SKIES ARE MOSTLY CLEAR 
THROUGHOUT THE FORECAST AREA.  WILL UPDATE ZONES TO REMOVE 
THUNDERSTORM WORDING. OTHERWISE...FORECAST ON TRACK AND NO OTHER 
UPDATES PLANNED.  THE UPPER LOW RESPONSIBLE FOR THE CONVECTIVE 
ACTIVITY WILL DUMBBELL AROUND ANOTHER LOW OVER CENTRAL CALIFORNIA 
AND MOVE INTO WESTERN OREGON ON MONDAY.  THE TWO LOWS WILL THEN 
PHASE TOGETHER. WITH THE LOW FURTHER WEST TOMORROW...UPPER LEVEL 
SUPPORT AND MOISTURE WILL BE LESS.  BOTH GFS AND MESOETA MODELS DO 
INDICATE SOME INSTABILITY OVER CENTRAL AND NORTHEAST OREGON...BUT A 
CAP (STABLE LAYER) IN THE ATMOSPHERE SHOULD KEEP ANY CLOUDS FROM 
DEVELOPING INTO SHOWERS OR THUNDERSTORMS.  THIS PATTERN REMAINS THE 
SAME FOR TUESDAY...WITH CONTINUED DRY AND WARM CONDITIONS EXPECTED. 
SMITH

&&

.PREVIOUS DISCUSSION...A WEAK DISTURBANCE WILL THEN MOVE DOWN FROM 
THE NORTHWEST TUESDAY NIGHT AND WEDNESDAY.  THIS DISTURBANCE WILL 
USHER IN 4-10 DEGREES OF COOLING ON WEDNESDAY...WITH THE BIGGEST 
DROP IN THE MOUNTAINS AND KITTITAS VALLEY.     

WEDNESDAY NIGHT THROUGH SUNDAY...AN UPPER LEVEL HIGH PRESSURE RIDGE 
OVER THE NORTHEAST PACIFIC OCEAN AND THE PACIFIC NORTHWEST WILL KEEP 
DRY CONDITIONS AND SEASONABLE TEMPERATURES IN PLACE ACROSS THE 
FORECAST AREA THROUGH SUNDAY.  

&&

.PRELIMINARY POINT TEMPS/POPS...
PENDLETON (AIRPORT) 052 084 053 085 / 000 000 000 000 
WALLA WALLA         055 085 056 083 / 000 000 000 000 
TRI-CITIES          048 088 049 086 / 000 000 000 000 
YAKIMA              045 086 046 085 / 000 000 000 000 
HERMISTON           047 087 048 085 / 000 000 000 000 
ELLENSBURG          047 086 045 085 / 000 000 000 000 
REDMOND             040 084 040 085 / 010 010 000 010 
LA GRANDE           042 083 041 083 / 000 005 000 005 
JOHN DAY            047 085 047 087 / 010 005 000 005 
THE DALLES          053 086 054 085 / 000 000 000 000 
&&

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

$$
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