Winter Storm Warning 8, NWS Spokane, WA

000 
WWUS46 KOTX 081637
WSWOTX

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE SPOKANE WA
837 AM PST MON DEC 8 2008


IDZ027-081745-
/O.CAN.KOTX.WS.W.0008.000000T0000Z-081208T1800Z/
LEWIS AND SOUTHERN NEZ PERCE COUNTIES-
INCLUDING THE FOLLOWING LOCATIONS...KAMIAH...CRAIGMONT...
NEZPERCE...WINCHESTER
837 AM PST MON DEC 8 2008

...WINTER STORM WARNING IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN SPOKANE HAS CANCELLED THE WINTER
STORM WARNING. SNOWFALL HAS ENDED ACROSS THE CAMAS PRAIRIE THIS
MORNING AND FURTHER ACCUMULATION IS NOT EXPECTED. 

$$

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SPOKANE WA
944 PM PST SUN DEC 7 2008

.SYNOPSIS...
AN UNSTABLE UPPER LEVEL TROUGH WILL BRING NUMEROUS SNOW SHOWERS
TONIGHT TO MUCH OF CENTRAL IDAHO AND THE BLUE MOUNTAINS. THIS TROUGH
WILL EXIT THE REGION MONDAY MORNING. CONDITIONS WILL BECOME DRIER
LATE MONDAY AND INTO TUESDAY. ANOTHER WEAK SYSTEM WILL BRING MORE
MOUNTAIN SNOW TUESDAY NIGHT AND WEDNESDAY. BIG CHANGES ARE LIKELY
FRIDAY INTO THE WEEKEND AS A DEEP AND COLD UPPER LEVEL LOW MOVES
OVER THE PACIFIC NORTHWEST. THIS SYSTEM SHOULD BRING THE COLDEST
WEATHER SO FAR THIS SEASON AS WELL AS A GOOD POSSIBILITY OF SNOW FOR
MOST LOCATIONS.

&&

.DISCUSSION...

UPDATED AVIATION DISCUSSION

SATELLITE AND RADAR SHOW THAT NORTH IDAHO HAS TRENDED MUCH DRIER
IN THE PAST FEW HOURS BEHIND THE EARLIER COLD FRONT PASSAGE EXCEPT
FOR THE LEWISTON AREA...IDAHO PALOUSE...AND THE CAMAS PRAIRIE.
RAIN HAS CHANGED OVER TO SNOW ABOVE 3500 FEET ON THE CAMAS PRAIRIE
WITH WINCHESTER AS OF 6 PM PICKING UP 1.1 INCHES OF SNOW. SO WINTER
WEATHER ADVISORY FOR SNOW WAS MOVED UP TO NOW...INSTEAD OF THE
PRIOR 10 PM START TIME. MEANWHILE...RADAR SHOWS AN AREA OF
SHOWERS FROM NEAR KELLER STRETCHING SOUTHEAST TOWARD DAVENPORT.
THIS IS IN RESPONSE TO A SHORT WAVE DROPPING SOUTH OUT OF BRITISH
COLUMBIA. THE 00Z NAM12 CAPTURING THIS WELL...TRACKING THIS
FEATURE SOUTHEAST TOWARDS AND PALOUSE AND CAMAS PRAIRIE AREA
TONIGHT...WHILE MISSING THE CENTRAL PANHANDLE MOUNTAINS TO THE
WEST. THUS...BASED ON THESE REASONS AND COORDINATION WITH WFO
MISSOULA DECIDED TO END THE WINTER STORM WARNING FOR HEAVY SNOW AS
THE THREAT FOR ADDITIONAL SIGNIFICANT ACCUMULATIONS HAS ENDED.
HOWEVER...UPSLOPE SNOW SHOWERS MAY RING OUT ANOTHER INCH IN THE
MOUNTAINS. FINALLY...PATCHY FOG WAS ADDED TO THE VALLEYS IN AND
NORTH OF SPOKANE UP TO DEER PARK AS CAMERAS SHOW FOG HAS FORMED IN
SPOTS DUE TO BREAKS IN THE CLOUD COVER.  JW

&&

.AVIATION...
VERY MOIST CONDITIONS IN THE LOW LEVELS OF THE ATMOSPHERE OVER
EASTERN WA/N IDAHO WILL LEAD TO IFR/MVFR STRATUS FOR TAF SITES
KGEG/KSFF/KCOE/KPUW THROUGH AT LEAST 20Z TOMORROW.  MEANWHILE A WEAK
SHORT WAVE DROPPING SOUTHEAST FROM NORTH CENTRAL WASHINGTON WILL
BRING A BRIEF PERIOD OF A MIXTURE OF -SHRA...-SHRASN...AND -SHSN FOR
THESE AREAS.  KPUW WILL BE MOST LIKELY TO SEE -SN GIVEN LATER TIMING
OF PRECIP MOVING INTO AREA WITH A DUSTING OF SNOW POSSIBLE BTWN
10Z-13Z.  FOR KEAT/KMWH VFR CONDITIONS SHOULD PERSIST ALTHOUGH A
NARROW TEMP/DEW POINT SPREAD AT KMWH LEADS TO A SLIGHT CHANCE FOR
FOG FORMATION BTWN 12Z-18Z.  JW

&&

.PRELIMINARY POINT TEMPS/POPS...
SPOKANE        27  35  25  35  29  37 /  30  10  10  30  60  40
COEUR DALENE  29  37  28  36  31  39 /  20  10  10  30  60  40
PULLMAN        32  36  30  39  34  43 /  60  30  10  10  50  40
LEWISTON       35  40  32  42  35  47 /  60  40  10  10  40  30
COLVILLE       25  36  23  36  26  37 /  30  10  10  50  60  40
SANDPOINT      28  37  28  35  30  37 /  20  20  20  60  60  40
KELLOGG        30  34  27  36  30  38 /  40  40  20  30  60  40
MOSES LAKE     26  42  24  40  27  41 /  10   0   0  20  20  20
WENATCHEE      28  40  27  41  32  42 /  10   0   0  20  20  10
OMAK           25  41  20  37  25  38 /  20  10  10  30  20  20

&&

.OTX WATCHES/WARNINGS/ADVISORIES...
ID...WINTER WEATHER ADVISORY UNTIL 7 AM PST MONDAY FOR LEWIS AND
     SOUTHERN NEZ PERCE COUNTIES.

WA...NONE.
&&

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SPOKANE WA
736 PM PST SUN DEC 7 2008

IDZ001>004-026-WAZ031>038-041>044-081500-
NORTHERN PANHANDLE-COEUR DALENE AREA-IDAHO PALOUSE-
CENTRAL PANHANDLE MOUNTAINS-LEWISTON AREA-
NORTHEAST BLUE MOUNTAINS-LOWER GARFIELD AND ASOTIN COUNTIES-
WASHINGTON PALOUSE-MOSES LAKE AREA-UPPER COLUMBIA BASIN-
SPOKANE AREA-NORTHEAST MOUNTAINS-OKANOGAN HIGHLANDS-
WENATCHEE AREA-EAST SLOPES NORTHERN CASCADES-OKANOGAN VALLEY-
WATERVILLE PLATEAU-
736 PM PST SUN DEC 7 2008

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH IDAHO...
NORTH CENTRAL IDAHO...CENTRAL WASHINGTON...EAST CENTRAL
WASHINGTON...NORTH CENTRAL WASHINGTON...NORTHEAST WASHINGTON AND
SOUTHEAST WASHINGTON.

.DAY ONE...TONIGHT

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

A WEAK WEATHER SYSTEM WILL PASS THROUGH TUESDAY AND TUESDAY NIGHT
BRINGING THE CHANCE FOR LIGHT TO MODERATE SNOW ACCUMULATIONS
ACROSS THE VALLEYS OF NE WASHINGTON AND NORTH IDAHO. A MUCH COLDER
SYSTEM WILL MOVE OVER THE AREA BY THE END OF THE WEEK WITH A
CHANCE FOR SNOW OVER ALL OF CENTRAL AND EASTERN WASHINGTON AS WELL
AS NORTH IDAHO.

IDZ027-081500-
LEWIS AND SOUTHERN NEZ PERCE COUNTIES-
736 PM PST SUN DEC 7 2008

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH CENTRAL
IDAHO.

.DAY ONE...TONIGHT

SNOW SHOWERS WILL PERSIST THROUGH TONIGHT WITH MODERATE SNOW
ACCUMULATIONS ABOVE 3500 FEET.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

ACCUMULATING SNOW SHOWERS WILL END MONDAY MORNING WITH NO
ADDITIONAL HAZARDOUS WEATHER THROUGH THURSDAY. A MUCH COLDER
SYSTEM WILL MOVE OVER THE AREA BY THE END OF THE WEEK WITH SNOW
LIKELY.