FXUS66 KOTX 230603
AFDOTX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SPOKANE WA
1003 PM PST TUE DEC 22 2009
.SYNOPSIS...
AN UPPER LEVEL DISTURBANCE DROPPING FROM CANADA TONIGHT WILL BRING
A FEW LIGHT SNOW SHOWERS TO THE IDAHO PANHANDLE...AND DRY NORTH
WINDS ACROSS MUCH OF EASTERN WASHINGTON. DRY AND COLD WEATHER CAN
BE EXPECTED ACROSS THE INLAND NORTHWEST FOR MUCH OF THE WEEK AS
HIGH PRESSURE BUILDS OVER THE REGION. ANTICIPATE INCREASING
CHANCES OF FOG AND LOW CLOUDS BY THE HOLIDAY WEEKEND.
&&
.DISCUSSION...
UPDATE...SATELLITE IMAGERY INDICATES A DRIER NORTHERLY MID-LEVEL FLOW
DEVELOPING ACROSS THE INLAND NW. ISOLATED SNOW SHOWERS OR FLURRIES
HAVE BEEN DETECTED ON RADAR FROM TIME TO TIME...MAINLY ACROSS THE
PANHANDLE AND FAR EASTERN WASHINGTON. A FAIR AMOUNT OF CLEARING
HAS SPREAD ACROSS THE CASCADES AND COLUMBIA BASIN...WHILE A LOW
LEVEL SOUTHWESTERLY FLOW HAS HELD LOWER CLOUDS IN AROUND THE BLUES
AND THE SPOKANE/C'DA AREA AND PANHANDLE MTNS. THE LOWER CLOUDS
SHOULD BEGIN TO ERODE TOWARD EARLY WEDNESDAY AS A MORE NORTHERLY FLOW
DEVELOPS AT THE SFC TOO. SOME CLEARING SEEMS TO BE DEVELOPING DOWN
THE PURCELL TRENCH...NORTH OF SANDPOINT ALREADY. FEW TWEAKS MADE
TO LOWER TEMPS IN THE NORTH WHERE THERE IS A BIT MORE CLEARING AND
MINOR ADJUSTMENTS MADE TO CLOUD COVER AND POPS FOR THE NIGHT.
OVERALL THE THREAT FOR ACCUMULATING SNOW TONIGHT REMAINS LOW. /JCOTE
&&
.AVIATION...
06Z TAFS...MID-LEVEL DISTURBANCE WORKING DOWN THE ID/MT BORDER
INTO WEDNESDAY WILL KEEP A RISK FOR ISOLATED -SHSN GOING. IFR/LCL
LIFR CIGS CONTINUE OVER THE KGEG-KCOE SITES TUESDAY NIGHT AS THE
LOW LEVEL SWLY FLOW KEEPS THE STRATUS IN PLACE. MVFR/LCL IFR CIGS
AROUND KPUW-KLWS. AS A NORTHERLY FLOW DEVELOPS TOWARD WEDNESDAY
MORNING THESE LOWER CLOUDS ARE EXPECTED TO LIFT AND ERODE.
CONFIDENCE HOW PRECISELY HOW QUICK THIS WILL OCCUR IS ONLY
FAIR...BUT STARTING BETWEEN 12-18Z WEDNESDAY LOOK FOR SOME
IMPROVEMENT. WESTERN TAF SITES ARE PROJECTED TO REMAIN VFR. /JCOTE
&&
.PRELIMINARY POINT TEMPS/POPS...
SPOKANE 21 28 12 23 14 26 / 20 10 0 0 0 0
COEUR D'ALENE 22 28 14 24 15 27 / 20 10 0 0 0 0
PULLMAN 22 29 12 25 17 28 / 30 10 0 0 0 0
LEWISTON 27 35 19 30 19 29 / 20 20 0 0 0 0
COLVILLE 19 28 11 25 12 27 / 10 0 0 0 0 0
SANDPOINT 23 28 12 22 13 25 / 50 10 0 0 0 0
KELLOGG 23 27 11 22 13 25 / 50 20 0 0 0 0
MOSES LAKE 20 31 16 27 13 27 / 0 0 0 0 0 0
WENATCHEE 23 30 19 27 19 26 / 0 0 0 0 0 0
OMAK 17 25 10 24 15 25 / 0 0 0 0 0 0
&&
.OTX WATCHES/WARNINGS/ADVISORIES...
ID...NONE.
WA...NONE.
&&
$$
