471
FXUS66 KOTX 231834
AFDOTX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SPOKANE WA
1034 AM PST MON NOV 23 2009
SYNOPSIS
WEAK HIGH PRESSURE OVER THE REGION WILL PROMOTE DRY BUT MOSTLY
CLOUDY CONDITIONS TODAY. A WEAK PACIFIC WARM FRONT WILL BRING A
POSSIBILITY OF VERY LIGHT PRECIPITATION TONIGHT...WITH GENERALLY
DRY BUT CLOUDY WEATHER RETURNING TUESDAY AND THROUGH THANKSGIVING.
ON FRIDAY A COLD FRONT WILL PASS THROUGH WITH ANOTHER REASONABLE
CHANCE OF MOUNTAIN SNOW AND VALLEY RAIN OR SNOW. CONDITIONS WILL
REMAIN CLOUDY AND UNSETTLED INTO NEXT WEEKEND.
DISCUSSION
A SHORTWAVE RIDGE WILL BUILD OVER THE REGION TODAY FOR MAINLY DRY
CONDITIONS ACROSS THE INLAND NORTHWEST. SATELLITE WATER VAPOR
IMAGERY SHOWS THE MOISTURE ASSOCIATED WITH A WEAK WARM FRONT
APPROACHING VANCOUVER ISLAND THIS MORNING. SOME LIGHT RETURNS ARE
SHOWING UP ON REGIONAL RADAR MOSAIC BUT SURFACE OBSERVATIONS
INDICATE THAT THIS IS JUST THE MID LEVEL CLOUD DECK MOVING IN FROM
THE WEST. CLOUDS WILL BE ON THE INCREASE THIS AFTERNOON BUT ONLY
VERY LIGHT PRECIPITATION EXPECTED ACROSS THE CASCADE CREST AND
NORTHERN TIER AS MOIST ISENTROPIC UPGLIDE SPREADS ACROSS THE
CASCADES TO THE NORTHERN MTS THIS EVENING. ONLY MINOR UPDATES MADE
TO THE FORECAST THIS MORNING. POPS WERE REDUCED A BIT AND TEMPS
AND SKY COVER ADJUSTED TO ACCOUNT FOR TRENDS IN OBSERVATIONS.
/KELCH
AVIATION
A SHORTWAVE RIDGE WILL MOVE OVERHEAD TODAY RESULTING IN LARGELY
VFR CONDITIONS AREA WIDE. A WEAK WARM FRONT WILL MOVE INTO
NORTHERN WA AND THE ID PANHANDLE TONIGHT RESULTING IN RAIN AND
SNOW SHOWERS. HOWEVER...SOME UNCERTAINTY EXISTS ON WHETHER OR NOT
PRECIP...AND SUBSEQUENT MVFR CIGS...WILL REACH THE KGEG-KCOE
CORRIDOR LATE TONIGHT. LIGHT UPSLOPE WINDS MAY ALLOW LOW STRATUS
TO DEVELOP IN THE KGEG-KCOE AREA AFTER 10Z TUESDAY. /EK
PRELIMINARY POINT TEMPS/POPS
SPOKANE 38 33 39 31 41 31 / 0 50 10 10 0 0
COEUR D'ALENE 39 33 39 31 41 31 / 0 50 10 10 0 0
PULLMAN 39 34 41 29 43 32 / 10 50 30 0 0 0
LEWISTON 45 34 45 34 45 34 / 10 30 20 0 0 0
COLVILLE 40 34 40 29 40 27 / 20 70 10 20 20 10
SANDPOINT 37 30 35 27 36 26 / 10 60 10 20 20 10
KELLOGG 35 28 37 28 40 29 / 20 60 30 10 10 0
MOSES LAKE 43 28 44 31 44 30 / 0 10 10 0 0 0
WENATCHEE 42 31 43 32 43 32 / 10 20 10 10 10 0
OMAK 40 27 43 29 43 29 / 40 60 10 20 10 10
OTX WATCHES/WARNINGS/ADVISORIES
ID...NONE.
WA...NONE.
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