Winter Storm Watch 6, NWS Spokane, WA

509 
WWUS46 KOTX 272256
WSWOTX

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE SPOKANE WA
256 PM PST MON FEB 27 2012

...SIGNIFICANT WINTER STORM POSSIBLE TUESDAY NIGHT THOUGH
THURSDAY MORNING...

A STRONG PACIFIC STORM WILL MOVE INTO EASTERN WASHINGTON AND
NORTH IDAHO BEGINNING TUESDAY NIGHT. THIS WILL BRING WIDESPREAD
SNOW TO THE INLAND NORTHWEST WITH SIGNIFICANT SNOWS POSSIBLE IN
THE MOUNTAINS AND VALLEYS ACROSS THE CASCADES...NORTHERN
WASHINGTON AND THE IDAHO PANHANDLE. THERE IS STILL SOME
UNCERTAINTY AS TO HOW LONG THE HEAVIEST SNOWFALL WILL REMAIN OVER
THE REGION...BUT THE LAST OF THE SIGNIFICANT SNOWS MAY NOT END FOR
THE CENTRAL IDAHO PANHANDLE MOUNTAINS UNTIL WELL INTO THURSDAY. 

IDZ001-004-WAZ037-038-042-043-280700-
/O.CON.KOTX.WS.A.0006.120229T0600Z-120301T0600Z/
NORTHERN PANHANDLE-CENTRAL PANHANDLE MOUNTAINS-
NORTHEAST MOUNTAINS-OKANOGAN HIGHLANDS-
EAST SLOPES NORTHERN CASCADES-OKANOGAN VALLEY-
INCLUDING THE FOLLOWING LOCATIONS...SANDPOINT...ATHOL...
BONNERS FERRY...PRIEST RIVER...EASTPORT...
SCHWEITZER MOUNTAIN ROAD...KELLOGG...PINEHURST...OSBURN...
WALLACE...MULLAN...FOURTH OF JULY PASS...DOBSON PASS...
LOOKOUT PASS...COLVILLE...DEER PARK...CHEWELAH...NEWPORT...
KETTLE FALLS...SPRINGDALE-HUNTERS ROAD...ORIN-RICE ROAD...
FLOWERY TRAIL ROAD...REPUBLIC...INCHELIUM...WAUCONDA...
CHESAW ROAD...HIGHWAY 20 WAUCONDA SUMMIT...BOULDER CREEK ROAD...
SHERMAN PASS...LEAVENWORTH...MAZAMA...TWISP...WINTHROP...
STEHEKIN...CONCONULLY...BLEWETT PASS...LOUP LOUP PASS...OMAK...
OKANOGAN...BREWSTER...BRIDGEPORT...OROVILLE...NESPELEM...
DISAUTEL PASS
256 PM PST MON FEB 27 2012

...WINTER STORM WATCH REMAINS IN EFFECT FROM TUESDAY EVENING
THROUGH WEDNESDAY EVENING...

* SNOW ACCUMULATIONS: 4 TO 8 INCHES VALLEYS...AND 10 TO 15 INCHES
  IN THE MOUNTAINS. THIS UNSTABLE WEATHER PATTERN FAVORS EMBEDDED
  HEAVIER AMOUNTS.

* WINDS: SOUTHWEST 10 TO 15 MPH WITH GUSTS UP TO 25 MPH. GUSTS
  AROUND 40 MPH POSSIBLE IN THE MOUNTAINS WEDNESDAY PRODUCING
  BLOWING AND DRIFTING SNOW.

* TIMING: SNOW WILL START TO FALL TUESDAY EVENING AND SPREAD 
  FROM WEST TO EAST TUESDAY NIGHT. SNOW WILL INCREASE IN 
  INTENSITY OVERNIGHT TUESDAY AND CONTINUE THROUGH WEDNESDAY 
  NIGHT. 

* LOCATIONS: SANDPOINT...ATHOL...BONNERS FERRY...PRIEST RIVER... 
  EASTPORT...SCHWEITZER MOUNTAIN ROAD...KELLOGG...PINEHURST... 
  OSBURN...WALLACE...MULLAN...FOURTH OF JULY PASS...DOBSON 
  PASS... LOOKOUT PASS...REPUBLIC...INCHELIUM...WAUCONDA...
  CHESAW ROAD... HIGHWAY 20 WAUCONDA SUMMIT...BOULDER CREEK 
  ROAD...SHERMAN PASS... LEAVENWORTH...MAZAMA...TWISP...
  WINTHROP...STEHEKIN...CONCONULLY... BLEWETT PASS...LOUP LOUP 
  PASS...OMAK...OKANOGAN...BREWSTER... BRIDGEPORT...OROVILLE...
  NESPELEM...DISAUTEL PASS...COLVILLE... DEER PARK...CHEWELAH...
  NEWPORT...KETTLE FALLS...SPRINGDALE- HUNTERS ROAD...ORIN-RICE 
  ROAD...FLOWERY TRAIL ROAD.

* IMPACTS: SNOW COVERED ROADS WILL MAKE TRAVEL DIFFICULT. PERIODS
  OF HEAVY SNOW AND BLOWING SNOW WILL REDUCE VISIBILITY. TRAVEL
  DELAYS WILL BE POSSIBLE AS A RESULT OF HAZARDOUS DRIVING
  CONDITIONS. THIS INCLUDES INTERSTATE 90.  

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WATCH MEANS THERE IS A POTENTIAL FOR SIGNIFICANT
SNOW ACCUMULATIONS THAT MAY IMPACT TRAVEL. CONTINUE TO MONITOR
THE LATEST FORECASTS.

&&

$$

113 
WWUS46 KOTX 280653
WSWOTX

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE SPOKANE WA
1053 PM PST MON FEB 27 2012

...SIGNIFICANT WINTER STORM POSSIBLE TUESDAY NIGHT THOUGH
THURSDAY MORNING...

A STRONG PACIFIC STORM WILL MOVE INTO EASTERN WASHINGTON AND
NORTH IDAHO BEGINNING TUESDAY NIGHT. THIS WILL BRING WIDESPREAD
SNOW TO THE INLAND NORTHWEST WITH SIGNIFICANT SNOWS POSSIBLE IN
THE MOUNTAINS AND VALLEYS ACROSS THE CASCADES...NORTHERN
WASHINGTON AND THE IDAHO PANHANDLE. THERE IS STILL SOME
UNCERTAINTY AS TO HOW LONG THE HEAVIEST SNOWFALL WILL REMAIN OVER
THE REGION...BUT THE LAST OF THE SIGNIFICANT SNOWS MAY NOT END
FOR THE CENTRAL IDAHO PANHANDLE MOUNTAINS UNTIL WELL INTO
THURSDAY.

IDZ001-004-WAZ037-038-042-043-281500-
/O.CON.KOTX.WS.A.0006.120229T0600Z-120301T0600Z/
NORTHERN PANHANDLE-CENTRAL PANHANDLE MOUNTAINS-
NORTHEAST MOUNTAINS-OKANOGAN HIGHLANDS-
EAST SLOPES NORTHERN CASCADES-OKANOGAN VALLEY-
INCLUDING THE FOLLOWING LOCATIONS...SANDPOINT...ATHOL...
BONNERS FERRY...PRIEST RIVER...EASTPORT...
SCHWEITZER MOUNTAIN ROAD...KELLOGG...PINEHURST...OSBURN...
WALLACE...MULLAN...FOURTH OF JULY PASS...DOBSON PASS...
LOOKOUT PASS...COLVILLE...DEER PARK...CHEWELAH...NEWPORT...
KETTLE FALLS...SPRINGDALE-HUNTERS ROAD...ORIN-RICE ROAD...
FLOWERY TRAIL ROAD...REPUBLIC...INCHELIUM...WAUCONDA...
CHESAW ROAD...HIGHWAY 20 WAUCONDA SUMMIT...BOULDER CREEK ROAD...
SHERMAN PASS...LEAVENWORTH...MAZAMA...TWISP...WINTHROP...
STEHEKIN...CONCONULLY...BLEWETT PASS...LOUP LOUP PASS...OMAK...
OKANOGAN...BREWSTER...BRIDGEPORT...OROVILLE...NESPELEM...
DISAUTEL PASS
1053 PM PST MON FEB 27 2012

...WINTER STORM WATCH REMAINS IN EFFECT FROM TUESDAY EVENING
THROUGH WEDNESDAY EVENING...

* SNOW ACCUMULATIONS: 4 TO 8 INCHES VALLEYS...AND 10 TO 15 
  INCHES IN THE MOUNTAINS. THIS UNSTABLE WEATHER PATTERN FAVORS 
  EMBEDDED HEAVIER AMOUNTS. 

* WINDS: SOUTHWEST 10 TO 15 MPH WITH GUSTS UP TO 25 MPH. GUSTS 
  AROUND 40 MPH POSSIBLE IN THE MOUNTAINS WEDNESDAY PRODUCING 
  BLOWING AND DRIFTING SNOW. 

* TIMING: SNOW WILL START TO FALL TUESDAY EVENING AND SPREAD 
  FROM WEST TO EAST TUESDAY NIGHT. SNOW WILL INCREASE IN 
  INTENSITY OVERNIGHT TUESDAY AND CONTINUE THROUGH WEDNESDAY 
  NIGHT. 

* LOCATIONS: SANDPOINT...ATHOL...BONNERS FERRY...PRIEST RIVER... 
  EASTPORT...SCHWEITZER MOUNTAIN ROAD...KELLOGG...PINEHURST... 
  OSBURN...WALLACE...MULLAN...FOURTH OF JULY PASS...DOBSON 
  PASS... LOOKOUT PASS...REPUBLIC...INCHELIUM...WAUCONDA... 
  CHESAW ROAD... HIGHWAY 20 WAUCONDA SUMMIT...BOULDER CREEK 
  ROAD... SHERMAN PASS... LEAVENWORTH...MAZAMA...TWISP... 
  WINTHROP... STEHEKIN...CONCONULLY... BLEWETT PASS...LOUP LOUP 
  PASS...OMAK... OKANOGAN...BREWSTER... BRIDGEPORT...OROVILLE... 
  NESPELEM... DISAUTEL PASS...COLVILLE... DEER PARK...CHEWELAH...
   NEWPORT... KETTLE FALLS...SPRINGDALE- HUNTERS ROAD...ORIN-
  RICE ROAD... FLOWERY TRAIL ROAD. 

* IMPACTS: SNOW COVERED ROADS WILL MAKE TRAVEL DIFFICULT. 
  PERIODS OF HEAVY SNOW AND BLOWING SNOW WILL REDUCE VISIBILITY. 
  TRAVEL DELAYS WILL BE POSSIBLE AS A RESULT OF HAZARDOUS 
  DRIVING CONDITIONS. THIS INCLUDES INTERSTATE 90. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WATCH MEANS THERE IS A POTENTIAL FOR SIGNIFICANT
SNOW ACCUMULATIONS THAT MAY IMPACT TRAVEL. CONTINUE TO MONITOR
THE LATEST FORECASTS.

&&

$$

347 
WWUS46 KOTX 281203
WSWOTX

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE SPOKANE WA
403 AM PST TUE FEB 28 2012

...SIGNIFICANT WINTER STORM WILL IMPACT MUCH OF THE INLAND
NORTHWEST TONIGHT THROUGH WEDNESDAY...

A STRONG PACIFIC STORM IS EXPECTED TO MOVE INTO THE CASCADES THIS
EVENING AND ACROSS THE REMAINDER OF THE REGION OVERNIGHT. SNOW
WILL BRIEFLY TAPER OFF BEFORE TURING TO WIDESPREAD SHOWERS ON
WEDNESDAY. THE HEAVIEST SNOWFALL IS EXPECTED TO OCCUR NEAR THE 
CASCADES...NORTHERN MOUNTAINS OF EASTERN WASHINGTON AND THE IDAHO
PANHANDLE. THE SNOW WILL GRADUALLY TAPER OFF FROM WEST TO
EAST...BUT COULD PERSIST OVER THE IDAHO PANHANDLE INTO EARLY
THURSDAY. 

IDZ001-004-290000-
/O.UPG.KOTX.WS.A.0006.120229T0600Z-120301T0600Z/
/O.NEW.KOTX.WS.W.0007.120229T0600Z-120301T1200Z/
NORTHERN PANHANDLE-CENTRAL PANHANDLE MOUNTAINS-
INCLUDING THE FOLLOWING LOCATIONS...SANDPOINT...ATHOL...
BONNERS FERRY...PRIEST RIVER...EASTPORT...
SCHWEITZER MOUNTAIN ROAD...KELLOGG...PINEHURST...OSBURN...
WALLACE...MULLAN...FOURTH OF JULY PASS...DOBSON PASS...
LOOKOUT PASS
403 AM PST TUE FEB 28 2012

...WINTER STORM WARNING IN EFFECT FROM 10 PM THIS EVENING TO 4 AM
PST THURSDAY...

THE NATIONAL WEATHER SERVICE IN SPOKANE HAS ISSUED A WINTER STORM
WARNING FOR HEAVY SNOW...WHICH IS IN EFFECT FROM 10 PM THIS EVENING TO
4 AM PST THURSDAY. THE WINTER STORM WATCH IS NO LONGER IN EFFECT.

* SNOW ACCUMULATIONS: 5 TO 9 INCHES.

* WINDS: SOUTH 5 TO 15 MPH WITH GUSTS UP TO 35 MPH OVER THE MOUNTAINS.

* TEMPERATURES: IN THE UPPER 20S.

* TIMING: THE SNOW WILL BEGIN TO FALL LATE THIS EVENING AND BECOME
  HEAVY AT TIMES THROUGH EARLY WEDNESDAY MORNING. AFTER A BRIEF
  BREAK DURING THE MORNING...NUMEROUS SNOW SHOWERS WILL DEVELOP
  DURING THE AFTERNOON AND PERSIST INTO THE NIGHT. THE SHOWERS
  WILL BEGIN TO DECREASE IN COVERAGE BY EARLY THURSDAY MORNING. 

* LOCATIONS: SANDPOINT...ATHOL...BONNERS FERRY...PRIEST RIVER... 
  EASTPORT...SCHWEITZER MOUNTAIN ROAD...KELLOGG...PINEHURST... 
  OSBURN...WALLACE...MULLAN...FOURTH OF JULY PASS...DOBSON 
  PASS... LOOKOUT PASS.

* IMPACTS: SNOW COVERED ROADS WILL MAKE TRAVEL DIFFICULT WHILE
  PERIODS OF HEAVY SNOW WILL REDUCE VISIBILITIES. TRAVEL DELAYS
  WILL BE POSSIBLE AS A RESULT OF HAZARDOUS DRIVING CONDITIONS.
  THIS INCLUDES MUCH OF INTERSTATE 90 OVER THE IDAHO PANHANDLE. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING FOR HEAVY SNOW MEANS SIGNIFICANT AMOUNTS
OF SNOW ARE EXPECTED OR OCCURRING. SNOW ACCUMULATIONS WILL MAKE
TRAVEL VERY HAZARDOUS OR IMPOSSIBLE.

&&

$$

WAZ037-038-290000-
/O.UPG.KOTX.WS.A.0006.120229T0600Z-120301T0600Z/
/O.NEW.KOTX.WS.W.0007.120229T0600Z-120301T0000Z/
NORTHEAST MOUNTAINS-OKANOGAN HIGHLANDS-
INCLUDING THE FOLLOWING LOCATIONS...COLVILLE...DEER PARK...
CHEWELAH...NEWPORT...KETTLE FALLS...SPRINGDALE-HUNTERS ROAD...
ORIN-RICE ROAD...FLOWERY TRAIL ROAD...REPUBLIC...INCHELIUM...
WAUCONDA...CHESAW ROAD...HIGHWAY 20 WAUCONDA SUMMIT...
BOULDER CREEK ROAD...SHERMAN PASS
403 AM PST TUE FEB 28 2012

...WINTER STORM WARNING IN EFFECT FROM 10 PM THIS EVENING TO 4 PM
PST WEDNESDAY...

THE NATIONAL WEATHER SERVICE IN SPOKANE HAS ISSUED A WINTER STORM
WARNING FOR HEAVY SNOW...WHICH IS IN EFFECT FROM 10 PM THIS EVENING
TO 4 PM PST WEDNESDAY. THE WINTER STORM WATCH IS NO LONGER IN
EFFECT.

* SNOW ACCUMULATIONS: 4 TO 8 INCHES.

* WINDS: SOUTH 10 TO 15 MPH WITH GUSTS UP TO 30 MPH OVER THE MOUNTAINS.

* TEMPERATURES: IN THE UPPER 20S.

* TIMING: THE SNOW WILL BEGIN TO FALL THIS EVENING AND BECOME
  HEAVY AT TIMES OVERNIGHT. AFTER A BRIEF BREAK DURING THE EARLY
  MORNING HOURS...NUMEROUS SNOW SHOWERS WILL DEVELOP BEFORE MIDDAY
  AND PERSIST THROUGH THE AFTERNOON. THE SHOWERS WILL BEGIN TO
  DECREASE IN COVERAGE WEDNESDAY EVENING.

* LOCATIONS: REPUBLIC...INCHELIUM...WAUCONDA...CHESAW ROAD... 
  HIGHWAY 20 WAUCONDA SUMMIT...BOULDER CREEK ROAD...SHERMAN 
  PASS... COLVILLE...DEER PARK...CHEWELAH...NEWPORT...KETTLE 
  FALLS... SPRINGDALE-HUNTERS ROAD...ORIN-RICE ROAD...FLOWERY 
  TRAIL ROAD.

* IMPACTS: SNOW COVERED ROADS WILL MAKE TRAVEL DIFFICULT WHILE
  PERIODS OF HEAVY SNOW REDUCE VISIBILITIES. TRAVEL DELAYS WILL BE
  POSSIBLE ACROSS PORTIONS OF HIGHWAY 2...HIGHWAY 395 AND HIGHWAY
  20.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING FOR HEAVY SNOW MEANS SIGNIFICANT AMOUNTS
OF SNOW ARE EXPECTED OR OCCURRING. SNOW ACCUMULATIONS WILL MAKE
TRAVEL VERY HAZARDOUS OR IMPOSSIBLE.

&&

$$

WAZ042-290000-
/O.UPG.KOTX.WS.A.0006.120229T0600Z-120301T0600Z/
/O.NEW.KOTX.WS.W.0007.120229T0000Z-120301T0600Z/
EAST SLOPES NORTHERN CASCADES-
INCLUDING THE FOLLOWING LOCATIONS...LEAVENWORTH...MAZAMA...
TWISP...WINTHROP...STEHEKIN...CONCONULLY...BLEWETT PASS...
LOUP LOUP PASS
403 AM PST TUE FEB 28 2012

...WINTER STORM WARNING IN EFFECT FROM 4 PM THIS AFTERNOON TO
10 PM PST WEDNESDAY...

THE NATIONAL WEATHER SERVICE IN SPOKANE HAS ISSUED A WINTER STORM
WARNING FOR HEAVY SNOW...WHICH IS IN EFFECT FROM
4 PM THIS AFTERNOON TO 10 PM PST WEDNESDAY. THE WINTER STORM
WATCH IS NO LONGER IN EFFECT.

* SNOW ACCUMULATIONS: 6 TO 13 INCHES.

* WINDS: SOUTH 5 TO 15 MPH WITH GUSTS UP TO 25 MPH OVER THE MOUNTAINS.

* TEMPERATURES: IN THE MID 20S.

* TIMING: SNOW WILL BEGIN LATE THIS AFTERNOON AND CONTINUE THROUGH
  MUCH OF THE NIGHT. A BRIEF BREAK WILL LIKELY OCCUR
  OVERNIGHT...WITH NUMEROUS SNOW SHOWERS REDEVELOPING NEAR THE
  CREST THROUGH WEDNESDAY AND WEDNESDAY EVENING. THE SNOW THIS
  EVENING WILL IMPACT ALL LOCATIONS...WHILE THE SHOWERS ON
  WEDNESDAY WILL MAINLY IMPACT LOCATIONS NEAR THE CASCADE CREST
  INCLUDING UPPER PORTIONS OF LAKE CHELAN AND UPPER PORTIONS OF
  THE METHOW AND WENATCHEE VALLEYS.

* LOCATIONS: LEAVENWORTH...MAZAMA...TWISP...WINTHROP...
  STEHEKIN... CONCONULLY...BLEWETT PASS...LOUP LOUP PASS.

* IMPACTS: SNOW COVERED ROADS WILL MAKE TRAVEL DIFFICULT WHILE
  PERIODS OF HEAVY SNOW WILL REDUCE VISIBILITIES. TRAVEL DELAYS
  WILL BE POSSIBLE AS A RESULT OF HAZARDOUS DRIVING CONDITIONS.
  THIS INCLUDES MUCH OF HIGHWAY 2 WEST OF WENATCHEE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING FOR HEAVY SNOW MEANS SIGNIFICANT AMOUNTS
OF SNOW ARE EXPECTED OR OCCURRING. SNOW ACCUMULATIONS WILL MAKE
TRAVEL VERY HAZARDOUS OR IMPOSSIBLE.

&&

$$

WAZ043-290000-
/O.UPG.KOTX.WS.A.0006.120229T0600Z-120301T0600Z/
/O.NEW.KOTX.WS.W.0007.120229T0600Z-120301T0000Z/
OKANOGAN VALLEY-
INCLUDING THE FOLLOWING LOCATIONS...OMAK...OKANOGAN...BREWSTER...
BRIDGEPORT...OROVILLE...NESPELEM...DISAUTEL PASS
403 AM PST TUE FEB 28 2012

...WINTER STORM WARNING IN EFFECT FROM 10 PM THIS EVENING TO 4 PM
PST WEDNESDAY...

THE NATIONAL WEATHER SERVICE IN SPOKANE HAS ISSUED A WINTER STORM
WARNING FOR HEAVY SNOW...WHICH IS IN EFFECT FROM 10 PM THIS EVENING
TO 4 PM PST WEDNESDAY. THE WINTER STORM WATCH IS NO LONGER IN
EFFECT.

* SNOW ACCUMULATIONS: 3 TO 5 INCHES.

* WINDS: SOUTH TO 10 MPH.

* TEMPERATURES: IN THE 20S TONIGHT AND INTO THE 30S ON WEDNESDAY.

* TIMING: SNOW WILL START TO THIS EVENING...BEFORE TAPERING LATE
  TONIGHT. THERE WILL BE A BREAK IN THE PRECIPITATION BEFORE
  NUMEROUS SNOW SHOWERS DEVELOP BY MIDDAY WEDNESDAY. 

* LOCATIONS: OMAK...OKANOGAN...BREWSTER...BRIDGEPORT...
  OROVILLE... NESPELEM...DISAUTEL PASS.

* IMPACTS: SNOW COVERED ROADS WILL MAKE TRAVEL DIFFICULT WHILE
  PERIODS OF HEAVY SNOW WILL REDUCE VISIBILITIES. TRAVEL DELAYS
  WILL BE POSSIBLE AS A RESULT OF HAZARDOUS DRIVING CONDITIONS.
  THIS INCLUDES MUCH OF HIGHWAY 97 THROUGH THE OKANOGAN VALLEY. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING FOR HEAVY SNOW MEANS SIGNIFICANT AMOUNTS
OF SNOW ARE EXPECTED OR OCCURRING. SNOW ACCUMULATIONS WILL MAKE
TRAVEL VERY HAZARDOUS OR IMPOSSIBLE.

&&

$$

IDZ002-003-WAZ033-036-290000-
/O.NEW.KOTX.WW.Y.0012.120229T0600Z-120301T0000Z/
COEUR D'ALENE AREA-IDAHO PALOUSE-WASHINGTON PALOUSE-SPOKANE AREA-
INCLUDING THE FOLLOWING LOCATIONS...COEUR D'ALENE...POST FALLS...
HAYDEN...WORLEY...MOSCOW...PLUMMER...POTLATCH...GENESEE...
PULLMAN...COLFAX...ROSALIA...LA CROSSE...OAKESDALE...TEKOA...
UNIONTOWN...SPOKANE...CHENEY...DAVENPORT...ROCKFORD
403 AM PST TUE FEB 28 2012

...WINTER WEATHER ADVISORY IN EFFECT FROM 10 PM THIS EVENING TO
4 PM PST WEDNESDAY...

THE NATIONAL WEATHER SERVICE IN SPOKANE HAS ISSUED A WINTER
WEATHER ADVISORY FOR SNOW...WHICH IS IN EFFECT
FROM 10 PM THIS EVENING TO 4 PM PST WEDNESDAY.

* SNOW ACCUMULATIONS: 1 TO 2 INCHES IS EXPECTED TO FALL OVERNIGHT
  INTO EARLY WEDNESDAY MORNING. NUMEROUS SNOW SHOWERS ARE EXPECTED
  TO REDEVELOP BY MIDDAY WEDNESDAY BEFORE TAPERING OFF IN THE
  EVENING. AN ADDITIONAL 1 TO 2 INCHES OF SNOW IS POSSIBLE BUT
  AMOUNTS WILL VARY SIGNIFICANTLY OVER SHORT DISTANCES. 

* WINDS: EAST TO 10 MPH OVERNIGHT AND SOUTH TO SOUTHWEST 10 TO 20
  MPH WITH GUSTS UP TO 30 MPH ON WEDNESDAY.

* TEMPERATURES: IN THE 20S OVERNIGHT RISING INTO THE MID 30S ON WEDNESDAY.

* TIMING: THE SNOW IS EXPECTED TO DEVELOP OVERNIGHT AND LINGER
  INTO EARLY WEDNESDAY MORNING. SNOW SHOWERS WILL REDEVELOP BY
  MIDDAY WEDNESDAY.

* LOCATIONS: MOSCOW...PLUMMER...POTLATCH...GENESEE...COEUR 
  D'ALENE...POST FALLS...HAYDEN...WORLEY...PULLMAN...COLFAX... 
  ROSALIA...LA CROSSE...OAKESDALE...TEKOA...UNIONTOWN...
  SPOKANE... CHENEY...DAVENPORT...ROCKFORD.

* IMPACTS: THE FIRST ROUND OF SNOW IS EXPECTED TO IMPACT THE
  MORNING COMMUTE WITH WINTER DRIVING CONDITIONS. SNOW SHOWERS IN
  THE AFTERNOON COULD HAVE TROUBLE ACCUMULATING ON ROADS...EXCEPT
  UNDER THE HEAVIEST SHOWERS. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW
WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW
COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE
DRIVING.

&&

$$

WAZ035-041-044-290000-
/O.NEW.KOTX.WW.Y.0012.120229T0000Z-120229T1200Z/
UPPER COLUMBIA BASIN-WENATCHEE AREA-WATERVILLE PLATEAU-
INCLUDING THE FOLLOWING LOCATIONS...RITZVILLE...GRAND COULEE...
WILBUR...COULEE CITY...WENATCHEE...CHELAN...ENTIAT...CASHMERE...
WATERVILLE...MANSFIELD...BADGER MOUNTAIN ROAD
403 AM PST TUE FEB 28 2012

...WINTER WEATHER ADVISORY IN EFFECT FROM 4 PM THIS AFTERNOON TO
4 AM PST WEDNESDAY...

THE NATIONAL WEATHER SERVICE IN SPOKANE HAS ISSUED A WINTER
WEATHER ADVISORY FOR SNOW...WHICH IS IN EFFECT FROM 4 PM THIS
AFTERNOON TO 4 AM PST WEDNESDAY.

* SNOW ACCUMULATIONS: 1 TO 2 INCHES...BUT LOCALLY TO 3 INCHES
  NORTH OF HIGHWAY 2.

* WINDS: EAST TO 10 MPH IN THE EVENING BECOMING SOUTH 10 TO 15 MPH
  EARLY WEDNESDAY.

* TEMPERATURES: IN THE MID 20S TO LOWER 30S.

* TIMING: SNOW WILL MOVE INTO THE WENATCHEE AREA DURING THE
  EVENING AND SPREAD INTO EASTERN COLUMBIA BASIN AROUND MIDNIGHT.
  THE SNOW WILL TAPER OFF TO SCATTERED SHOWERS BY EARLY WEDNESDAY
  MORNING. 

* LOCATIONS: WENATCHEE...CHELAN...ENTIAT...CASHMERE... 
  WATERVILLE...MANSFIELD...BADGER MOUNTAIN ROAD...RITZVILLE...
  GRAND COULEE...WILBUR...COULEE CITY.

* IMPACTS: WINTER DRIVING CONDITIONS ARE EXPECTED TO DEVELOP
  ACROSS MUCH OF THE AREA...INCLUDING I90 FROM SPRAGUE TO
  RITZVILLE AND MOST OF HIGHWAY 2. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW
WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW
COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE
DRIVING.

&&

$$

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SPOKANE WA
210 AM PST Mon Feb 27 2012

.SYNOPSIS...
A dry but cool break in the active weather will last through
Tuesday. The next strong snow bearing storm system will arrive
Tuesday night and Wednesday...with widespread significant snow
accumulations likely. Unsettled and cool winter-like weather will
continue through next weekend.

&&

.DISCUSSION...

Today through Tuesday: A couple of dissipating convective vortices
are falling apart as they move out of the area at this hour. The
most potent of these remaining mesoscale systems seems to be the
one evident on satellite and radar located just NW of Walla Walla
as of 2 AM. Reflectivities with this continue to be fairly
impressive and compact, however the trend has been to shift these
higher reflectivities into the NWS Pendleton's area through the
night. It would seem given the trends that the last vestiges of
precipitation from this meso-vort will have exited the area by
morning, so no organized areas of precipitation are anticipated
through the day today. The only real driving factor for anything
but basically mostly sunny skies will be trailing cold mid-level
air that will be slow to exit the southeastern portions of the
area. As some daytime heating gets going, it does seem marginally
possible that an isolated snow shower may develop in the higher
terrain around Lewiston, however the chance will likely be limited
to the Blues/Camas Prairie. Even if any activity does develop,
accumulations seem likely to be nearly nil.

The other factor to consider for the first few hours of the
morning is fog. While fog has been rather persistent through the
night around and just south of Spokane, drier air does seem to be
filtering its way into the CWA via strong northerly flow down the
Okanogan Valley, bringing continental polar air into the CWA. Fog
product imagery has shown the extent of the fog around Spokane to
be shrinking in the past hour or two, and given the dewpoint
trends around the area, it would seem the majority of the fog
should be gone by sunrise. As a result, no fog was carried in the
morning forecast.

Layer RH values really crater on the models through the day today,
so clear skies should prevail, however boundary layer flow does
slacken through the day while remaining largely northerly. This
will keep mixing from becoming too efficient, so even with
abundant sunshine, temperatures are still likely to be held back
during the afternoon. As a general rule, highs were generally
adjusted above MEX/MAV guidance given the late February sun. This
does not mean a warm day is in store, however, as -6 to -7C at 850
mb with less than stellar mixing basically keeps the valleys in a
window from mid 30s (with snow cover) to low 40s (without snow
cover).

With continued weakening boundary layer flow and much lower
dewpoints going into the night, Monday night looks to be the
coldest night of the year so far for many areas. It certainly
wouldn't be a surprise to see the colder spots of the CWA falling
below zero. With the drier air in place, fog looks likely to be
relegated to the isolated valleys, as well. Beyond that, Tuesday
looks like a relative copy of Monday with temperatures moderating
slightly. This will be tempered by the fact that clouds will be
increasing from the west in advance of a large system that will
impact the region mid-week. /Fries

Tuesday night through Thursday...A strong Pacific storm will bring
accumulating snow to the Inland Northwest during the mid week
period. A cold air mass will be in place as Pacific moisture begins
to overspread the region. Snow will begin to fall across the east
slopes of the Cascades Tuesday evening where easterly upslope flow
will enhance lift. Precipitation will spread east to the remainder
of the forecast area overnight Tuesday. Confidence is growing that
the heaviest snowfall will be across the northern zones. Model
consensus is high with this system. There are some fine details that
still need to be worked out. The placement of the heaviest snowfall
is generally north of the I-90 corridor but the GFS has been
consistent in placing a bulls eye of qpf right over the Spokane-C'DA
areas. The timing continues to bring the bulk of the snow during the
overnight hours and into the morning commute. For now, a winter
storm watch will be issued for the northern tier from the Cascades
to North Idaho. Snowfall amounts for the valleys could be in the 6
to 8 inch range with over a foot possible in the mountains. The
remainder of the forecast area will likely see advisory amounts.
More winter highlights will likely be need as the event nears, but
for now, the watch includes the zones with the highest confidence
level. Gusty winds will accompany the cold frontal passage late
Wednesday and will continue Wednesday night. A shift to westerly
flow will bring a precipitation shadow to the east slopes and basin
while focusing precip on the eastern zones favorable to westerly
upslope flow. Temperatures will continue the below normal trend as
the region remains under the influence of a broad upper level trough.

Thursday through Sunday...Moist and unstable northwest flow will
keep a chance of showers in the forecast into the weekend.
Temperatures will trend closer to seasonal normals by Saturday when
the region will be in the warm sector ahead of another Pacific
frontal system. /Kelch

&&

.AVIATION...
06Z TAFs: Showers expected to round down in the next 2-3 hrs. Have
tempo LIFR conditions for KGEG...KSFF...KCOE. As the drier northerly
flow develops overnight...it should decrease the threat of LIFR fog
for these locations. Breezy northerly winds down the Okanogan and into
the Basin will continue overnight. Drier air will move in and produce
VFR conditions by 18z.

&&

.PRELIMINARY POINT TEMPS/POPS...
Spokane        34  13  37  25  35  24 /   0   0   0  70  90  60
Coeur d'Alene  35  11  38  23  31  24 /   0   0   0  60  90  80
Pullman        37   8  39  26  36  26 /   0   0   0  70  90  60
Lewiston       43  21  46  32  41  30 /  10   0   0  50  70  50
Colville       36  10  37  24  36  18 /   0   0   0  70  90  70
Sandpoint      34   8  35  21  33  21 /   0   0   0  50  90  80
Kellogg        34  13  36  19  32  21 /  10   0   0  50  90  90
Moses Lake     42  16  43  28  43  27 /   0   0   0  80  50  20
Wenatchee      39  20  39  27  40  27 /   0   0   0  90  70  20
Omak           34  10  37  22  36  21 /   0   0   0  80  90  20

&&

.OTX WATCHES/WARNINGS/ADVISORIES...
ID...Winter Storm Watch from Tuesday evening through Wednesday
     evening for Central Panhandle Mountains-Northern Panhandle.

WA...Winter Storm Watch from Tuesday evening through Wednesday
     evening for East Slopes Northern Cascades-Northeast
     Mountains-Okanogan Highlands-Okanogan Valley.

&&

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SPOKANE WA
652 AM PST SUN FEB 26 2012

IDZ001-WAZ037-271500-
NORTHERN PANHANDLE-NORTHEAST MOUNTAINS-
652 AM PST SUN FEB 26 2012

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

.DAY ONE...TODAY AND TONIGHT

BANDS OF SNOW WILL PRODUCE ACCUMULATIONS OVER NORTHEAST
WASHINGTON AND FAR NORTH IDAHO TODAY. ACCUMULATIONS IN THIS REGION
WILL GENERALLY BE LESS THAN 3 INCHES. HOWEVER...SOME SPOTS AROUND
COLVILLE...METALINE FALLS...PRIEST LAKE...AND SANDPOINT WILL HAVE
THE POTENTIAL TO RECEIVE AS MUCH AS 5 INCHES OF SNOW FROM EARLY
THIS MORNING THROUGH THIS AFTERNOON.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

AN UNSEASONABLY COLD AIR MASS WILL DESCEND UPON THE INLAND
NORTHWEST MONDAY AND TUESDAY. A PACIFIC STORM SYSTEM WILL COLLIDE
WITH THIS COLD AIR TUESDAY NIGHT INTO WEDNESDAY TO PRODUCE ANOTHER
ROUND OF ACCUMULATING SNOW.

IDZ002>004-026-027-WAZ031>036-038-041>044-271500-
COEUR D'ALENE AREA-IDAHO PALOUSE-CENTRAL PANHANDLE MOUNTAINS-
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-OKANOGAN HIGHLANDS-WENATCHEE AREA-
EAST SLOPES NORTHERN CASCADES-OKANOGAN VALLEY-WATERVILLE PLATEAU-
652 AM PST SUN FEB 26 2012

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...TODAY AND TONIGHT

SNOW SHOWERS WILL DEVELOP OVER MUCH OF EASTERN WASHINGTON AND
NORTH IDAHO THIS AFTERNOON AND EVENING. SOME OF THE STRONGER SNOW
SHOWERS WILL PRODUCE TEMPORARY VISIBILITY RESTRICTIONS AND SLICK
DRIVING CONDITIONS.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

AN UNSEASONABLY COLD AIR MASS WILL DESCEND UPON THE INLAND
NORTHWEST MONDAY AND TUESDAY. A PACIFIC STORM SYSTEM WILL COLLIDE
WITH THIS COLD AIR TUESDAY NIGHT INTO WEDNESDAY TO PRODUCE ANOTHER
ROUND OF ACCUMULATING SNOW.