FXUS66 KOTX 221824
AFDOTX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SPOKANE WA
1024 AM PST TUE DEC 22 2009
.SYNOPSIS...
A COLD FRONT WILL EXIT THE INLAND NORTHWEST TODAY. THIS WILL BRING
AN END TO THE RAIN AND SNOW ACROSS EXTREME EASTERN WASHINGTON AND
NORTH IDAHO...AND THE FOG AND LOW CLOUDS OVER CENTRAL WASHINGTON.
AN UPPER LEVEL DISTURBANCE WILL BRING THE CHANCE FOR SOME LIGHT
SNOW TO THE IDAHO PANHANDLE TONIGHT INTO WEDNESDAY MORNING.
COLD...BUT DRY WEATHER IS EXPECTED FOR CHRISTMAS EVE THROUGH THE
WEEKEND FOLLOWING CHRISTMAS.
&&
.DISCUSSION...
UPDATED THE FORECAST TO EXPIRE THE WINTER WEATHER ADVISORY FOR THE
CAMAS PRAIRIE AND CENTRAL IDAHO PANHANDLE. THE TROWAL FEATURE OVER
THIS AREA IS WEAKENING QUICKLY AS THE UPPER LEVEL LOW IS DROPPING
LIKE A ROCK ACROSS OREGON. AREA WEB CAMS AND OBS SHOW LITTLE IN
THE WAY OF ACCUMULATING SNOW...ALTHOUGH AS THE 850MB TO 700MB FLOW
VEERS TO THE NORTHWEST UPSLOPE SHOWERS WILL LINGER IN THIS SAME
AREA. ADDITIONAL ACCUMULATIONS WILL BE MINOR AS THE MOISTURE
DWINDLES. MEANWHILE...A CLOUD DECK REMAINS PARKED OVER NORTH
CENTRAL WASHINGTON OVER KEAT...KMWH AND KEPH AND KOMK. ANTICIPATE
THIS DECK TO ERODE FROM THE NORTH WITH INCREASING COLD AIR
ADVECTION FROM THE NORTH. YET DID HAVE TO BOOST DAYTIME HIGHS IN
THIS AREA...AS TEMPERATURES HAVE NOT STARTED TO DROP WITH THE
ADVANCING COLD AIR. WILL CONTINUE TO MONITOR THE SHORTWAVE SLIDING
FROM THE PARENT LOW IN BC. THIS FEATURE WILL REINFORCE SNOW
SHOWERS OVER THE IDAHO PANHANDLE. AGAIN...SNOW SHOWER
ACCUMULATIONS WILL BE MINOR. OVERALL...EXPECT A GRADUAL
CLEARING...DRYING...AND COOLING TREND THROUGH THE DAY AND INTO
TONIGHT. /RFOX.
&&
.AVIATION...
LIGHT SNOW AND IFR CONDITIONS ARE IMPROVING FROM KPUW AND
KLWS...AND EXPECT MVFR STRATUS TO CONTINUE THROUGH THE PERIOD AND
EXTEND INTO THE CENTRAL IDAHO PANHANDLE NEAR KMLP WITH MOUNTAIN
OBSCURATIONS. WILL SEE SOME PATCHES LIFR STRATUS/FOG IN AND OUT OF
KLWS FOR THE NEXT COUPLE OF HOURS. MVFR STRATUS WILL ALSO LIFT
FROM KMWH...SIMILAR TO KEAT...THROUGH THE AFTERNOON. THEN EXPECT
GRADUAL CLEARING FROM THE NORTH AND KOMK DURING THE EVENING AND
OVERNIGHT WITH INCREASED NORTHERLY FLOW. KGEG-KCOE WILL GRADUALLY
LIFT FROM IFR TO MVFR THROUGH THE AFTERNOON...YET NOT EXPECTING
THE DRIER AIR TO ERODE THE LOW LEVEL MOISTURE OVERNIGHT. SO FELT
MORE CONFIDENT ON BRINGS CIGS AND VSBYS BACK TO DOWN TO IFR
OVERNIGHT...ESPECIALLY IN KGEG WHERE NW-N SFC WINDS WILL BE LIGHT.
/RFOX.
&&
.PRELIMINARY POINT TEMPS/POPS...
SPOKANE 33 21 27 14 24 13 / 50 20 10 0 0 0
COEUR D'ALENE 34 25 28 14 25 15 / 50 20 10 0 0 0
PULLMAN 33 24 28 12 25 14 / 100 20 30 0 0 0
LEWISTON 39 26 35 19 29 18 / 90 20 20 0 0 0
COLVILLE 36 19 26 11 24 11 / 10 10 0 0 0 0
SANDPOINT 37 24 28 13 23 13 / 30 50 20 0 0 0
KELLOGG 32 23 26 11 25 13 / 80 50 40 10 0 0
MOSES LAKE 36 20 31 16 27 12 / 20 0 0 0 0 0
WENATCHEE 39 22 29 19 28 16 / 20 0 0 0 0 0
OMAK 37 18 23 12 25 10 / 10 0 0 0 0 0
&&
.OTX WATCHES/WARNINGS/ADVISORIES...
ID...NONE.
WA...NONE.
&&
$$
