Snow Advisory 11, NWS Spokane, WA

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SPOKANE WA
225 PM PST SAT JAN 28 2006

.SYNOPSIS...A SERIES OF STORM SYSTEMS WILL MOVE THROUGH THE INLAND
NORTHWEST BRINGING MORE UNSETTLED WEATHER TO THE REGION THROUGH
EARLY NEXT WEEK.

&&

.DISCUSSION...
TODAY WAS ANOTHER VERY WARM DAY ACROSS THE INLAND NORTHWEST AND IN
FACT MARKED THE 40TH STRAIGHT DAY OF ABOVE AVERAGE TEMPERATURES FOR
SPOKANE. OF THOSE 40 DAYS...23 OF THEM HAVE BEEN 10 DEGREES OR MORE
ABOVE AVERAGE. NO END IN SIGHT TO THIS STRING AS A WARM AND
UNSETTLED WEATHER PATTERN CONTINUES. NEXT WEATHER SYSTEM ARRIVES IN
FULL FORCE ON SUNDAY. VERY IMPRESSIVE MOISTURE PLUME WITH THIS
SYSTEM AND STRONG DYNAMICS...AND EXPECT A SIGNIFICANT WINTER STORM
WILL DEVELOP ACROSS THE NORTHERN HALF OF THE CWA AND ALONG THE
CASCADE EAST SLOPES. TODAYS SYSTEM HAS LEFT BEHIND COOL ENOUGH AIR
ABOVE THE BOUNDARY LAYER TO AT LEAST BEGIN SUNDAYS STORM AS SNOW FOR
THE VALLEY LOCATIONS OF SPOKANE AND CDA HOWEVER AS HAS BEEN THE CASE
ALL WINTER...SURFACE TEMPERATURES SHOULD BE WARM ENOUGH TO REALLY
PREVENT MUCH ACCUMULATION. THIS WILL NOT BE THE CASE IN THE COLDER
VALLEYS TO THE NORTH AND LOCATIONS CLOSER TO THE CASCADES SO
SIGNIFICANT VALLEY SNOWS ARE POSSIBLE LATE SUNDAY...SUNDAY NIGHT AND
EARLY MONDAY BEFORE THE MILDER AIR MAKES ITS WAY IN ON THE HEELS OF
THE STORM. EXPECT THIS STORM TO REALLY WIND UP SIMILAR TO TODAYS
STORMS SO WINDS WILL BE SIGNIFICANT LATE SUNDAY AND MONDAY. WILL
GO WITH WINTER STORMS WARNINGS FOR THE NORTHERN VALLEYS AND
MOUNTAINS. WHEN THIS STORM SHOULD BRING WIDESPREAD 6 TO 12 INCHES
SNOWFALLS WITH ISOLATED AMOUNTS UP TO TWO FEET IN THE MOUNTAIN
LOCATIONS AND 4 TO 8 INCHES FOR THE MOST SHELTERED VALLEYS. WHILE
SNOW MAY FALL FOR A TIME IN THE SPOKANE AND CDA AREAS EXPECT SURFACE
TEMPS WILL BE JUST WARM ENOUGH TO PREVENT SIGNIFICANT ACCUMULATIONS.
OVER IN WENATCHEE WILL RAISE A SNOW ADVISORY AND A WSW FOR THE
WATERVILLE PLATEAU.  THE STORM WILL WIND DOWN ON MONDAY LEAVING
BEHIND NUMEROUS SNOW SHOWERS IN THE IDAHO MOUNTAINS. CR

MONDAY NIGHT THROUGH SATURDAY...LONGWAVE PATTERN CONTINUES TO DEPICT
A LARGE LONGWAVE TROF OVER THE EAST PACIFIC OPENING UP INTO A FLAT
ZONAL FLOW OVER EASTERN WASHINGTON AND NORTHERN IDAHO TUESDAY
THROUGH FRIDAY...THUS THE CONTINUED UNSETTLED WEATHER FORECAST WITH
NOT MUCH TIMING TO IT. LATEST GFS BUT DEPICTS LONGWAVE RIDGING
STARTING TO BUILD FRIDAY NIGHT AND AMPLIFYING MORE WITH TIME SATURDAY
AND SUNDAY. THIS SCENARIO COULD ALLOW FOR A DRY BENIGN FORECAST OVER
THE EAST PART OF THE FORECAST AREA FOR THE WEEKEND WHILE LEAVING
THE OTHER HALF NEAREST THE CASCADES MORE UNCERTAIN AS THE STORM TRACK
STILL ALLOWS FOR LOW PRESSURE SYSTEMS TO RIDE UP THE WEST SIDE OF THE
LONGWAVE RIDGE AND ALLOW FOR OVERRUNNING SNOW.

&&

.AVIATION...ISOLATED SHOWERS REMAIN IN POST FRONTAL AIRMASS IN THE
VICINITY OF SOME OF THE LOCAL TERMINALS BUT REGARDLESS CONDITIONS
WILL PRIMARILY REMAIN IFR WITH THE PESKY WIDESPREAD BREEZY SURFACE
WINDS FROM THE SOUTHWEST SUBSIDING THIS EVENING. SECOND LOW
PRESSURE SYSTEM STARTS TO AFFECT TERMINALS VERY CLOSE TO 00Z MONDAY.

&&

.PRELIMINARY POINT TEMPS/POPS...
SPOKANE        30  38  32  45  30  37 /  30  60 100  70  20  20
COEUR DALENE  30  37  31  44  31  38 /  50  60 100  80  20  20
PULLMAN        32  39  36  47  32  39 /  40  50 100  70  20  20
LEWISTON       36  42  36  51  34  46 /  30  40  70  70  30  20
COLVILLE       30  37  30  40  28  35 /  30  60 100  80  30  30
SANDPOINT      29  38  31  42  31  36 /  90  50 100 100  50  40
KELLOGG        32  38  32  42  31  37 /  90  60 100 100  60  40
MOSES LAKE     33  39  32  46  30  40 /  10  60  80  30  20  20
WENATCHEE      32  35  28  43  30  39 /  10  70 100  30  20  20
OMAK           32  35  30  41  27  37 /  10  60 100  40  20  20

&&

.OTX WATCHES/WARNINGS/ADVISORIES...
ID...WINTER STORM WARNING UNTIL 4 PM MONDAY FOR CENTRAL PANHANDLE
       MOUNTAINS.
     WINTER STORM WARNING FROM 4 PM SUNDAY TO 4 PM MONDAY FOR
       NORTHERN PANHANDLE.
WA...WINTER STORM WARNING FROM 4 PM SUNDAY TO 4 PM MONDAY FOR
       NORTHEAST MOUNTAINS...OKANOGAN HIGHLANDS.
     SNOW ADVISORY FROM 4 PM SUNDAY TO 4 AM MONDAY FOR WENATCHEE
AREA...       OKANOGAN VALLEY.
     WINTER STORM WARNING FROM NOON SUNDAY TO NOON MONDAY FOR EAST
       SLOPES NORTHERN CASCADES.
     WINTER STORM WARNING FROM 4 PM SUNDAY TO 4 AM MONDAY FOR
       WATERVILLE PLATEAU.
&&

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SPOKANE WA
1225 PM PST SAT JAN 28 2006

IDZ004-292030-
CENTRAL PANHANDLE MOUNTAINS-
INCLUDING THE CITIES OF...ST. MARIES...KELLOGG...PINEHURST...
OSBURN...WALLACE...MULLAN
1225 PM PST SAT JAN 28 2006

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH IDAHO.

THE FOLLOWING WATCHES WARNINGS OR ADVISORIES ARE CURRENTLY IN EFFECT
   HEAVY SNOW WARNING IN EFFECT UNTIL 10 PM PST THIS EVENING
     ABOVE 2500 FEET FOR CENTRAL PANHANDLE MOUNTAINS

PLEASE SEE THE FOLLOWING PRODUCTS FOR MORE INFORMATION.
   SEAWSWOTX  /WWUS46 KOTX/

.DAY ONE...THIS AFTERNOON AND TONIGHT

A STRONG COLD FRONT WILL EXIT THE REGION THIS EVENING.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

A SERIES OF WINTER STORMS WILL CONTINUE TO AFFECT THE REGION THROUGH
THE MIDDLE OF NEXT WEEK. MOST OF THE HEAVY SNOWS WILL BE CONFINED
TO THE MOUNTAINS...HOWEVER SOME VALLEY LOCATIONS...PARTICULARLY
NEAR THE CASCADES AND CANADIAN BORDER...COULD ALSO SEE HEAVY SNOWS.

IDZ001>003-026-027-WAZ031>038-041>044-292030-
NORTHERN PANHANDLE-COEUR DALENE AREA-IDAHO PALOUSE-LEWISTON AREA-
LEWIS AND SOUTHERN NEZ PERCE COUNTIES-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-
INCLUDING THE CITIES OF...SANDPOINT...RATHDRUM...BONNERS FERRY...
PRIEST RIVER...COEUR DALENE...POST FALLS...HAYDEN...MOSCOW...
LEWISTON...KAMIAH...CRAIGMONT...NEZPERCE...WINCHESTER...ANATONE...
PEOLA...CLARKSTON...PULLMAN...MOSES LAKE...EPHRATA...OTHELLO...
QUINCY...RITZVILLE...COULEE DAM...ODESSA...ELECTRIC CITY...
WILBUR...GRAND COULEE...COULEE CITY...SPOKANE...COLVILLE...
DEER PARK...CHEWELAH...NEWPORT...KETTLE FALLS...REPUBLIC...
INCHELIUM...WENATCHEE...LEAVENWORTH...MAZAMA...TWISP...WINTHROP...
OMAK...OKANOGAN...BREWSTER...BRIDGEPORT...OROVILLE...WATERVILLE...
MANSFIELD
1225 PM PST SAT JAN 28 2006

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...THIS AFTERNOON AND TONIGHT

NO HAZARDOUS WEATHER EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

A SERIES OF WINTER STORMS WILL CONTINUE TO AFFECT THE REGION THROUGH
THE MIDDLE OF NEXT WEEK. MOST OF THE HEAVY SNOWS WILL BE CONFINED
TO THE MOUNTAINS...HOWEVER SOME VALLEY LOCATIONS...PARTICULARLY
NEAR THE CASCADES AND CANADIAN BORDER... COULD ALSO SEE HEAVY
SNOWS.