030 
FXUS66 KPDT 150904
AFDPDT

NORTHEAST OREGON/SOUTHEAST WASHINGTON FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
230 AM PDT TUE APR 15 2003

OVER THE NEXT THREE DAYS...A SERIES OF DISTURBANCES WILL OSCILLATE 
AROUND A LONG WAVE TROUGH THAT IS LOCATED OFF SHORE. AN ABUNDANT 
MOISTURE TAP OFF SHORE WILL TRANSLATE TO SHOWERY ACTIVITY MAINLY 
DURING THE AFTERNOON AND EVENING HOURS EACH DAY...WITH ISOLATED 
THUNDERSTORMS POSSIBLE IN THE NORTHEAST MOUNTAINS ON TUESDAY AND  
WEDNESDAY. 850 MB TEMPERATURES WILL REMAIN LOW...SO SNOW LEVELS WILL 
REMAIN JUST ABOVE PASS LEVELS. BY THURSDAY...THE LONG WAVE TROUGH 
WILL SPLIT INTO A NORTHERN PORTION THAT WILL MOVE THROUGH THE 
PACIFIC NORTHWEST AND A SOUTHERN PORTION THE WILL MOVE THROUGH 
CALIFORNIA. HENRY

EXTENDED...HIGH PRESSURE WILL MOVE OVER THE PAC NW ON FRIDAY AND 
SATURDAY. EXPECT A DRY WARM FRONT TO MOVE THROUGH ON SATURDAY 
MORNING...WHICH WILL WARM UP TEMPERATURES TO NEAR 70 DEGREES IN THE 
BASIN THAT AFTERNOON. AS THE TRAILING COLD FRONT APPROACHES THE 
AREA...EXPECT INCREASING CLOUDS SATURDAY NIGHT WITH SHOWERS 
SPREADING ACROSS THE REGION ON SUNDAY. UNSETTLED WEATHER BEHIND THE 
COLD FRONT UNDER AN UPPER LEVEL TROUGH WILL KEEP SHOWERS IN THE 
FORECAST FOR MONDAY. VERY MINOR CHANGES TO THE CURRENT FORECAST. JR

PDT 2222  ALW 2222  PSC 2222  YKM 2222

.KPDT...NONE.

$$