Winter Storm Warning 4, NWS Seattle, WA

891 
WWUS46 KSEW 270442
WSWSEW

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE SEATTLE WA
842 PM PST SAT FEB 26 2011

WAZ518-519-271245-
/O.CON.KSEW.WS.W.0004.110227T1400Z-110301T0000Z/
WEST SLOPES NORTHERN CASCADES AND PASSES-
WEST SLOPES CENTRAL CASCADES AND PASSES-
842 PM PST SAT FEB 26 2011

...WINTER STORM WARNING REMAINS IN EFFECT FROM 6 AM SUNDAY TO
4 PM PST MONDAY FOR THE CASCADES...

A WINTER STORM WARNING FOR THE CASCADES REMAINS IN EFFECT FROM 6
AM SUNDAY TO 4 PM PST MONDAY.

* ACCUMULATIONS...24 HOUR SNOW AMOUNTS OF 1 OR 2 FEET ARE 
  EXPECTED IN THE CASCADES. 

* TIMING...LIGHT SNOW IS EXPECTED THIS EVENING. SNOWFALL
  INTENSITY WILL THEN PICK UP AND REACH PEAK INTENSITY ON 
  SUNDAY EVENING. HEAVY SNOW WILL CONTINUE INTO MONDAY 
  MORNING...THEN TAPER OFF ON MONDAY AFTERNOON. 

* MAIN IMPACTS...IN ADDITION TO TREACHEROUS TRAVEL THROUGH THE 
  MOUNTAINS...AVALANCHE DANGER WILL BE HIGH. AN AVALANCHE 
  WARNING IS ALSO IN EFFECT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING MEANS SEVERE WINTER WEATHER IS OCCURRING
OR IMMINENT. THOSE PLANNING TRAVEL IN THE WARNED AREA SHOULD BE
PREPARED FOR HAZARDOUS...WINTER DRIVING CONDITIONS AND PLAN
ACCORDINGLY.

&&

$$

WAZ511-271245-
/O.EXA.KSEW.WW.Y.0017.000000T0000Z-110227T1700Z/
HOOD CANAL AREA-
842 PM PST SAT FEB 26 2011

...WINTER WEATHER ADVISORY IN EFFECT UNTIL 9 AM PST SUNDAY FOR
THE HOOD CANAL AREA...

THE NATIONAL WEATHER SERVICE IN SEATTLE HAS ISSUED A WINTER
WEATHER ADVISORY FOR THE HOOD CANAL AREA FOR SNOW...WHICH IS IN
EFFECT UNTIL 9 AM PST SUNDAY.

* SOME AFFECTED LOCATIONS...SHELTON.

* ACCUMULATIONS...SNOWFALL ACCUMULATIONS OF 1 TO 3 INCHES ARE
  EXPECTED FROM TONIGHT THROUGH SUNDAY MORNING.

* TIMING...SNOW WILL CONTINUE OFF AND ON THIS EVENING. SNOW WILL
  GRADUALLY MIX WITH OR CHANGE TO RAIN AT LOWER ELEVATIONS FROM
  MIDNIGHT ON BUT MIGHT REMAIN AS SNOW ON HIGHER HILLS THROUGH
  SUNDAY MORNING.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...SLEET...OR
FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR
SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE
DRIVING.

&&

$$

WAZ001-503>510-271245-
/O.CON.KSEW.WW.Y.0017.000000T0000Z-110227T1700Z/
SAN JUAN COUNTY-WESTERN WHATCOM COUNTY-SOUTHWEST INTERIOR-
EAST PUGET SOUND LOWLANDS-WESTERN SKAGIT COUNTY-
EVERETT AND VICINITY-SEATTLE/BREMERTON AREA-TACOMA AREA-
ADMIRALTY INLET AREA-
842 PM PST SAT FEB 26 2011

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 AM PST
SUNDAY FOR THE I-5 CORRIDOR...

A WINTER WEATHER ADVISORY FOR THE I-5 CORRIDOR REMAINS IN EFFECT
UNTIL 9 AM PST SUNDAY.

* SOME AFFECTED LOCATIONS...CHEHALIS...CENTRALIA...OLYMPIA...
  TACOMA...FEDERAL WAY...SEATTLE...BREMERTON...EVERETT...MOUNT
  VERNON...AND BELLINGHAM.

* ACCUMULATIONS...SNOWFALL ACCUMULATIONS OF A TRACE TO 3 INCHES
  ARE EXPECTED FROM TONIGHT THROUGH SUNDAY MORNING. THE HIGHER
  AMOUNTS WILL BE OVER NORTHERN AREAS WITH LESS OVER THE SOUTH.

* TIMING...SNOW THAT HAS BEEN FALLING OVER NORTHERN AREAS THIS
  EVENING WILL GRADUALLY SPREAD SOUTH. SNOW WILL GRADUALLY MIX
  WITH OR CHANGE TO RAIN AT LOWER ELEVATIONS FROM MIDNIGHT ON BUT
  MIGHT REMAIN AS SNOW ON HIGHER HILLS THROUGH SUNDAY MORNING.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...SLEET...OR
FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR
SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE
DRIVING.

&&

$$

WAZ513-271245-
/O.CON.KSEW.WW.Y.0018.110227T1800Z-110228T1800Z/
OLYMPICS-
842 PM PST SAT FEB 26 2011

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 10 AM SUNDAY TO
10 AM PST MONDAY FOR THE OLYMPICS...

A WINTER WEATHER ADVISORY FOR THE OLYMPICS REMAINS IN EFFECT FROM
10 AM SUNDAY TO 10 AM PST MONDAY.

* ACCUMULATIONS...24 HOUR SNOW AMOUNTS OF 6 TO 12 INCHES ARE 
  EXPECTED FROM SUNDAY MORNING THROUGH MONDAY MORNING. 

* MAIN IMPACTS...IN ADDITION TO HAZARDOUS TRAVEL...AVALANCHE 
  DANGER WILL BE HIGH. AN AVALANCHE WARNING IS ALSO IN EFFECT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...SLEET...OR
FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR
SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE
DRIVING.

&&

$$

WWW.WEATHER.GOV/SEATTLE

450 
WWUS46 KSEW 271228
WSWSEW

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE SEATTLE WA
428 AM PST SUN FEB 27 2011

WAZ518-519-280030-
/O.CON.KSEW.WS.W.0004.110227T1400Z-110301T0000Z/
WEST SLOPES NORTHERN CASCADES AND PASSES-
WEST SLOPES CENTRAL CASCADES AND PASSES-
428 AM PST SUN FEB 27 2011

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 4 PM PST MONDAY...

* ACCUMULATIONS...ONE TO TWO FEET.

* TIMING...SNOW WILL CONTINUE TODAY AND TONIGHT...TAPERING ON
  MONDAY. THE HEAVIEST SNOW IS EXPECTED FROM LATE THIS AFTERNOON
  THROUGH EARLY MONDAY MORNING.

* MAIN IMPACTS...IN ADDITION TO TREACHEROUS TRAVEL THROUGH THE 
  MOUNTAINS...AVALANCHE DANGER WILL BE HIGH. AN AVALANCHE 
  WARNING IS ALSO IN EFFECT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING MEANS SEVERE WINTER WEATHER IS OCCURRING
OR IMMINENT. THOSE PLANNING TRAVEL IN THE WARNED AREA SHOULD BE
PREPARED FOR HAZARDOUS...WINTER DRIVING CONDITIONS AND PLAN
ACCORDINGLY.

&&

$$

WAZ001-503>511-271700-
/O.CON.KSEW.WW.Y.0017.000000T0000Z-110227T1700Z/
SAN JUAN COUNTY-WESTERN WHATCOM COUNTY-SOUTHWEST INTERIOR-
EAST PUGET SOUND LOWLANDS-WESTERN SKAGIT COUNTY-
EVERETT AND VICINITY-SEATTLE/BREMERTON AREA-TACOMA AREA-
ADMIRALTY INLET AREA-HOOD CANAL AREA-
428 AM PST SUN FEB 27 2011

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 AM PST THIS
MORNING...

* SOME AFFECTED LOCATIONS...CHEHALIS...CENTRALIA...OLYMPIA... 
  TACOMA...FEDERAL WAY...SEATTLE...BREMERTON...EVERETT...MOUNT 
  VERNON...AND BELLINGHAM. 

* ACCUMULATIONS...TRACE TO THREE INCHES. HIGHEST AMOUNTS WILL BE
  OVER WESTERN SKAGIT AND WESTERN WHATCOM COUNTIES AND NEAR THE
  CASCADE FOOTHILLS.

* TIMING...LIGHT SNOW WILL CONTINUE OFF AND ON BEFORE CHANGING TO
  RAIN LATER IN THE MORNING.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...SLEET...OR
FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR
SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE
DRIVING.

&&

$$

WAZ513-280030-
/O.CON.KSEW.WW.Y.0018.110227T1800Z-110228T1800Z/
OLYMPICS-
428 AM PST SUN FEB 27 2011

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 10 AM THIS
MORNING TO 10 AM PST MONDAY...

* ACCUMULATIONS...SIX TO TWELVE INCHES.

* MAIN IMPACTS...IN ADDITION TO HAZARDOUS TRAVEL...AVALANCHE 
  DANGER WILL BE HIGH. AN AVALANCHE WARNING IS ALSO IN EFFECT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...SLEET...OR
FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR
SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE
DRIVING.

&&

$$

WWW.WEATHER.GOV/SEATTLE

605 
WWUS46 KSEW 271654
WSWSEW

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE SEATTLE WA
854 AM PST SUN FEB 27 2011

WAZ001-503>511-271800-
/O.EXP.KSEW.WW.Y.0017.000000T0000Z-110227T1700Z/
SAN JUAN COUNTY-WESTERN WHATCOM COUNTY-SOUTHWEST INTERIOR-
EAST PUGET SOUND LOWLANDS-WESTERN SKAGIT COUNTY-
EVERETT AND VICINITY-SEATTLE/BREMERTON AREA-TACOMA AREA-
ADMIRALTY INLET AREA-HOOD CANAL AREA-
854 AM PST SUN FEB 27 2011

...WINTER WEATHER ADVISORY WILL EXPIRE AT 9 AM PST THIS MORNING
FOR THE INTERIOR LOWLANDS...

THE WINTER WEATHER ADVISORY FOR THE INTERIOR LOWLANDS WILL
EXPIRE AT 9 AM PST THIS MORNING. 

* ACCUMULATIONS...ANY ADDITIONAL ACCUMULATIONS TODAY WILL BE
  CONFINED TO HIGHER HILLS AND NEAR THE CASCADE FOOTHILLS WITH
  AMOUNTS REMAINING BELOW 1 INCH. TEMPERATURES WILL CONTINUE TO
  RISE ABOVE FREEZING TODAY...SO ANY ADDITIONAL ACCUMULATIONS
  TODAY WILL BE SLUSHY AND BRIEF.


$$

WAZ518-519-280100-
/O.CON.KSEW.WS.W.0004.000000T0000Z-110301T0000Z/
WEST SLOPES NORTHERN CASCADES AND PASSES-
WEST SLOPES CENTRAL CASCADES AND PASSES-
854 AM PST SUN FEB 27 2011

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 4 PM PST
MONDAY FOR HEAVY SNOW...

A WINTER STORM WARNING FOR THE WEST SLOPES OF THE NORTH AND
CENTRAL CASCADES REMAINS IN EFFECT UNTIL 4 PM PST MONDAY.

* ACCUMULATIONS...ONE TO TWO FEET IN THE PASSES FROM NOW THROUGH
  MONDAY MORNING. HIGHER AMOUNTS POSSIBLE NEAR MOUNT RAINIER.

* TIMING...SNOW WILL CONTINUE TODAY AND TONIGHT...TAPERING ON
  MONDAY. THE HEAVIEST AND MOST INTENSE SNOWFALL IS EXPECTED FROM
  LATE THIS AFTERNOON UNTIL LATE THIS EVENING.

* MAIN IMPACTS...IN ADDITION TO TREACHEROUS TRAVEL THROUGH THE 
  MOUNTAINS...AVALANCHE DANGER WILL BE HIGH. AN AVALANCHE 
  WARNING IS ALSO IN EFFECT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING MEANS SEVERE WINTER WEATHER IS OCCURRING
OR IMMINENT. THOSE PLANNING TRAVEL IN THE WARNED AREA SHOULD BE
PREPARED FOR HAZARDOUS...WINTER DRIVING CONDITIONS AND PLAN
ACCORDINGLY.

&&

$$

WAZ513-280100-
/O.CON.KSEW.WW.Y.0018.110227T1800Z-110228T1800Z/
OLYMPICS-
854 AM PST SUN FEB 27 2011

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST
MONDAY FOR SNOW...

A WINTER WEATHER ADVISORY FOR THE OLYMPIC MOUNTAINS REMAINS IN
EFFECT UNTIL 10 AM PST MONDAY. 

* ACCUMULATIONS...SIX TO TWELVE INCHES.

* MAIN IMPACTS...IN ADDITION TO HAZARDOUS TRAVEL...AVALANCHE 
  DANGER WILL BE HIGH. AN AVALANCHE WARNING IS ALSO IN EFFECT. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...SLEET...OR
FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR
SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE
DRIVING.

&&

$$

HANER

WEATHER.GOV/SEATTLE

942 
WWUS46 KSEW 272353
WSWSEW

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE SEATTLE WA
353 PM PST SUN FEB 27 2011

WAZ518-519-281200-
/O.CON.KSEW.WS.W.0004.000000T0000Z-110301T0000Z/
WEST SLOPES NORTHERN CASCADES AND PASSES-
WEST SLOPES CENTRAL CASCADES AND PASSES-
353 PM PST SUN FEB 27 2011

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 4 PM PST MONDAY...

A WINTER STORM WARNING FOR THE WEST SLOPES OF THE NORTH AND
CENTRAL CASCADES AND PASSES REMAINS IN EFFECT UNTIL 4 PM PST
MONDAY.

* ACCUMULATIONS...STORM TOTAL ACCUMULATIONS OF ONE TO TWO FEET ARE
  EXPECTED THROUGH MONDAY MORNING. HIGHER AMOUNTS TO 3 FEET ARE
  POSSIBLE NEAR MOUNT RAINIER.

* TIMING...THE HEAVIEST AND MOST INTENSE SNOWFALL IS EXPECTED THIS
  EVENING. SNOWFALL RATES WILL TAPER AROUND MID-DAY ON MONDAY.

* MAIN IMPACTS...IN ADDITION TO TREACHEROUS TRAVEL THROUGH THE
  MOUNTAINS...AVALANCHE DANGER WILL BE HIGH OR EXTREME. AN
  AVALANCHE WARNING IS ALSO IN EFFECT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING MEANS SEVERE WINTER WEATHER IS OCCURRING
OR IMMINENT. THOSE PLANNING TRAVEL IN THE WARNED AREA SHOULD BE
PREPARED FOR HAZARDOUS...WINTER DRIVING CONDITIONS AND PLAN
ACCORDINGLY.

&&

$$

WAZ513-281200-
/O.CON.KSEW.WW.Y.0018.000000T0000Z-110228T1800Z/
OLYMPICS-
353 PM PST SUN FEB 27 2011

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST
MONDAY...

A WINTER WEATHER ADVISORY FOR THE OLYMPIC MOUNTAINS REMAINS IN
EFFECT UNTIL 10 AM PST MONDAY.

* ACCUMULATIONS...STORM TOTAL ACCUMULATIONS OF SIX TO TWELVE
  INCHES ARE EXPECTED BY MONDAY MORNING.

* MAIN IMPACTS...IN ADDITION TO HAZARDOUS TRAVEL...AVALANCHE 
  DANGER WILL BE HIGH. AN AVALANCHE WARNING IS ALSO IN EFFECT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...SLEET...OR
FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR
SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE
DRIVING.

&&

$$

HANER

WEATHER.GOV/SEATTLE

494 
WWUS46 KSEW 281136
WSWSEW

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE SEATTLE WA
336 AM PST MON FEB 28 2011

WAZ518-519-010000-
/O.CON.KSEW.WS.W.0004.000000T0000Z-110301T0000Z/
WEST SLOPES NORTHERN CASCADES AND PASSES-
WEST SLOPES CENTRAL CASCADES AND PASSES-
336 AM PST MON FEB 28 2011

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 4 PM PST THIS
AFTERNOON...

* ACCUMULATIONS...AN ADDITIONAL FOUR TO TWELVE INCHES. STORM TOTAL
  ACCUMULATIONS OF ONE TO THREE FEET.

* TIMING...SNOW WILL CONTINUE THIS MORNING...THEN BECOME SHOWERY
  IN THE AFTERNOON.

* MAIN IMPACTS...IN ADDITION TO TREACHEROUS TRAVEL THROUGH THE 
  MOUNTAINS...AVALANCHE DANGER WILL BE HIGH OR EXTREME. AN 
  AVALANCHE WARNING IS ALSO IN EFFECT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING MEANS SEVERE WINTER WEATHER IS OCCURRING
OR IMMINENT. THOSE PLANNING TRAVEL IN THE WARNED AREA SHOULD BE
PREPARED FOR HAZARDOUS...WINTER DRIVING CONDITIONS AND PLAN
ACCORDINGLY.

&&

$$

WAZ513-281800-
/O.CON.KSEW.WW.Y.0018.000000T0000Z-110228T1800Z/
OLYMPICS-
336 AM PST MON FEB 28 2011

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST THIS
MORNING...

* ACCUMULATIONS...AN ADDITIONAL TWO TO SIX INCHES. STORM TOTAL
  ACCUMULATIONS OF SIX TO TWELVE INCHES ARE EXPECTED BY LATE
  MORNING.

* MAIN IMPACTS...IN ADDITION TO HAZARDOUS TRAVEL...AVALANCHE 
  DANGER WILL BE HIGH. AN AVALANCHE WARNING IS ALSO IN EFFECT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...SLEET...OR
FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR
SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE
DRIVING.

&&

$$

WWW.WEATHER.GOV/SEATTLE

874 
WWUS46 KSEW 282330
WSWSEW

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE SEATTLE WA
330 PM PST MON FEB 28 2011

WAZ519-010730-
/O.EXT.KSEW.WS.W.0004.000000T0000Z-110302T0000Z/
WEST SLOPES CENTRAL CASCADES AND PASSES-
330 PM PST MON FEB 28 2011

...WINTER STORM WARNING NOW IN EFFECT UNTIL 4 PM PST TUESDAY FOR
THE CENTRAL CASCADES...

THE WINTER STORM WARNING FOR THE CENTRAL CASCADES IS NOW IN EFFECT UNTIL
4 PM PST TUESDAY.

* TIMING...HEAVY SNOW WILL CONTINUE ACROSS THE CENTRAL CASCADES
  TONIGHT THROUGH TUESDAY AFTERNOON. 

* SNOWFALL...AN ADDITIONAL 6 TO 18 INCHES OF NEW SNOW IS EXPECTED
  THROUGH TUESDAY AFTERNOON.

* MAIN IMPACTS...HEAVY SNOW IS LIKELY AT STEVENS AND SNOQUALMIE
  PASS. AN AVALANCHE WARNING IS ALSO IN EFFECT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING MEANS SEVERE WINTER WEATHER IS OCCURRING
OR IMMINENT. THOSE PLANNING TRAVEL IN THE WARNED AREA SHOULD BE
PREPARED FOR HAZARDOUS...WINTER DRIVING CONDITIONS AND PLAN
ACCORDINGLY. FOR THE LATEST ROAD CONDITIONS...CALL 511 OR
800-695-ROAD...OR VISIT THE WASHINGTON STATE DEPARTMENT OF
TRANSPORTATION WEB SITE AT WWW.WSDOT.WA.GOV.

&&

$$

WAZ518-010730-
/O.NEW.KSEW.WW.Y.0019.110301T0000Z-110302T0000Z/
/O.CON.KSEW.WS.W.0004.000000T0000Z-110301T0000Z/
WEST SLOPES NORTHERN CASCADES AND PASSES-
330 PM PST MON FEB 28 2011

...WINTER WEATHER ADVISORY IN EFFECT UNTIL 4 PM PST TUESDAY FOR
THE NORTH CASCADES...

THE NATIONAL WEATHER SERVICE IN SEATTLE HAS ISSUED A WINTER
WEATHER ADVISORY FOR THE NORTH CASCADES...WHICH IS IN EFFECT
UNTIL 4 PM PST TUESDAY. THE WINTER STORM WARNING WILL EXPIRE AT 4
PM PST THIS AFTERNOON.

* TIMING...SNOW SHOWERS WILL CONTINUE ACROSS THE NORTH CASCADES
  TONIGHT THROUGH TUESDAY AFTERNOON.

* SNOWFALL...AN ADDITIONAL 4 TO 12 INCHES OF SNOW IS EXPECTED
  THROUGH TUESDAY AFTERNOON. 

* MAIN IMPACTS...EXPECT TREACHEROUS TRAVEL THROUGH THE MOUNTAINS.
  AN AVALANCHE WARNING IS ALSO IN EFFECT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE
TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED
VISIBILITIES...AND USE CAUTION WHILE DRIVING. FOR THE LATEST ROAD
CONDITIONS...CALL 511 OR 800-695-ROAD...OR VISIT THE WASHINGTON
STATE DEPARTMENT OF TRANSPORTATION WEB SITE AT WWW.WSDOT.WA.GOV.

&&

$$
33
WWW.WEATHER.GOV/SEATTLE

294 
WWUS46 KSEW 010447
WSWSEW

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE SEATTLE WA
847 PM PST MON FEB 28 2011

WAZ519-011300-
/O.CON.KSEW.WS.W.0004.000000T0000Z-110302T0000Z/
WEST SLOPES CENTRAL CASCADES AND PASSES-
847 PM PST MON FEB 28 2011

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 4 PM PST TUESDAY
FOR THE WEST SLOPES OF THE CENTRAL CASCADES AND PASSES...

A WINTER STORM WARNING FOR THE WEST SLOPES OF THE CENTRAL CASCADES
AND PASSES REMAINS IN EFFECT UNTIL 4 PM PST TUESDAY.

* TIMING...SNOWFALL RATES IN SHOWERS WILL DECREASE SOMEWHAT AFTER
  MIDNIGHT TONIGHT THROUGH EARLY TUESDAY MORNING...BUT WILL
  INCREASE AFTER 8 AM TUESDAY AS A WARM FRONT APPROACHES FROM THE
  SOUTH. THE HEAVY SNOW WILL CONTINUE THROUGH TUESDAY AFTERNOON
  AND MAY CONTINUE INTO TUESDAY NIGHT.

* SNOWFALL...AN ADDITIONAL 6 TO 18 INCHES OF NEW SNOW IS EXPECTED
  THROUGH TUESDAY AFTERNOON.

* SNOW LEVELS...AROUND 500 FEET TONIGHT RISING TO 2000 FEET
  TUESDAY AFTERNOON. 

* AN AVALANCHE WARNING IS ALSO EFFECT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING MEANS SEVERE WINTER WEATHER IS OCCURRING
OR IMMINENT. THOSE PLANNING TRAVEL IN THE WARNED AREA SHOULD BE
PREPARED FOR HAZARDOUS...WINTER DRIVING CONDITIONS AND PLAN
ACCORDINGLY. FOR THE LATEST ROAD CONDITIONS...CALL 511 OR 800-695-
ROAD...OR VISIT THE WASHINGTON STATE DEPARTMENT OF TRANSPORTATION
WEB SITE AT WWW.WSDOT.WA.GOV.

&&

$$

WAZ518-011300-
/O.CON.KSEW.WW.Y.0019.000000T0000Z-110302T0000Z/
WEST SLOPES NORTHERN CASCADES AND PASSES-
847 PM PST MON FEB 28 2011

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 PM PST
TUESDAY FOR THE WEST SLOPES OF THE NORTH CASCADES AND PASSES...

A WINTER WEATHER ADVISORY FOR THE WEST SLOPES OF THE NORTH
CASCADES AND PASSES REMAINS IN EFFECT UNTIL 4 PM PST TUESDAY.

* TIMING...SNOW SHOWERS WILL CONTINUE ACROSS THE NORTH CASCADES 
  TONIGHT THROUGH TUESDAY AFTERNOON. 

* SNOWFALL...AN ADDITIONAL 4 TO 12 INCHES OF SNOW IS EXPECTED
  THROUGH TUESDAY AFTERNOON.

* MAIN IMPACTS...EXPECT TREACHEROUS TRAVEL THROUGH THE 
  MOUNTAINS.AN AVALANCHE WARNING IS ALSO IN EFFECT. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE
TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED
VISIBILITIES...AND USE CAUTION WHILE DRIVING. FOR THE LATEST ROAD
CONDITIONS...CALL 511 OR 800-695-ROAD...OR VISIT THE WASHINGTON
STATE DEPARTMENT OF TRANSPORTATION WEB SITE AT WWW.WSDOT.WA.GOV.

&&

$$

ALBRECHT
WWW.WEATHER.GOV/SEATTLE

971 
WWUS46 KSEW 011217
WSWSEW

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE SEATTLE WA
417 AM PST TUE MAR 1 2011

WAZ519-020015-
/O.CAN.KSEW.WS.W.0004.000000T0000Z-110302T0000Z/
/O.EXB.KSEW.WW.Y.0019.000000T0000Z-110302T1400Z/
WEST SLOPES CENTRAL CASCADES AND PASSES-
417 AM PST TUE MAR 1 2011

...WINTER WEATHER ADVISORY IN EFFECT UNTIL 6 AM PST WEDNESDAY FOR
THE CENTRAL CASCADES... 
...WINTER STORM WARNING IS CANCELLED FOR THE CENTRAL CASCADES...

THE NATIONAL WEATHER SERVICE IN SEATTLE HAS ISSUED A WINTER
WEATHER ADVISORY FOR THE CENTRAL CASCADES FOR SNOW...WHICH IS IN
EFFECT UNTIL 6 AM PST WEDNESDAY. THE WINTER STORM WARNING HAS
BEEN CANCELLED.

* ACCUMULATIONS...2 TO 8 INCHES IS LIKELY TODAY...FOLLOWED BY AN
  ADDITIONAL 4 TO 10 INCHES TONIGHT.

* MAIN IMPACTS...EXPECT WINTER TRAVEL CONDITIONS THROUGH THE
  PASSES. AN AVALANCHE WARNING IS ALSO IN EFFECT.

A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE
TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED
VISIBILITIES...AND USE CAUTION WHILE DRIVING. FOR THE LATEST ROAD
CONDITIONS...CALL 511 OR 800-695-ROAD...OR VISIT THE WASHINGTON
STATE DEPARTMENT OF TRANSPORTATION WEB SITE AT WWW.WSDOT.WA.GOV.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...SLEET...OR
FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR
SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE
DRIVING.

&&

$$

WAZ518-020015-
/O.EXT.KSEW.WW.Y.0019.000000T0000Z-110302T1400Z/
WEST SLOPES NORTHERN CASCADES AND PASSES-
417 AM PST TUE MAR 1 2011

...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 6 AM PST WEDNESDAY
FOR THE NORTHERN CASCADES...

THE WINTER WEATHER ADVISORY FOR THE NORTHERN CASCADES IS NOW IN
EFFECT UNTIL 6 AM PST WEDNESDAY.

* ACCUMULATIONS...UP TO 6 INCHES IS LIKELY TODAY...FOLLOWED BY AN
  ADDITIONAL 4 TO 10 INCHES TONIGHT.

* MAIN IMPACTS...EXPECT WINTER TRAVEL CONDITIONS IN THE MOUNTAINS. AN
  AVALANCHE WARNING IS ALSO IN EFFECT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE
TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED
VISIBILITIES...AND USE CAUTION WHILE DRIVING. FOR THE LATEST ROAD
CONDITIONS...CALL 511 OR 800-695-ROAD...OR VISIT THE WASHINGTON
STATE DEPARTMENT OF TRANSPORTATION WEB SITE AT WWW.WSDOT.WA.GOV.

&&

$$

WWW.WEATHER.GOV/SEATTLE

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SEATTLE WA
940 AM PST SAT FEB 26 2011

.SYNOPSIS...ONSHORE FLOW WILL INCREASE TODAY AND SUNDAY WITH A
WARMING AND MOISTENING TREND. THE AIR MASS WILL START OFF COLD
ENOUGH FOR SNOW...BUT THEN A TRANSITION TO LOWLAND RAIN WILL TAKE
PLACE TONIGHT AND SUNDAY MORNING. A COLD FRONT WILL MOVE THROUGH THE
AREA SUNDAY AFTERNOON...BRINGING HEAVY MOUNTAIN SNOW AND A RAIN/SNOW
MIX TO THE LOWLANDS. AN UPPER TROUGH WILL KEEP THE WEATHER COOL AND
SHOWERY IN THE NEW WEEK.

&&

.SHORT TERM...AN UPPER TROUGH OVER SOUTHEAST ALASKA WILL DROP
SOUTHEAST TODAY. WEST/NORTHWEST FLOW ALOFT HAS ALREADY INCREASED
OVER WESTERN WASHINGTON...AND LOW-LEVEL ONSHORE FLOW WILL SOON
BEGIN. THE WARM ADVECTION PATTERN IS ALREADY SHOWING SIGNS OF
PROVIDING LIFT IN THE ATMOSPHERE. AROUND 8 AM...RADAR ECHOES STARTED
BLOSSOMING FROM THE SAN JUANS SOUTHEAST TO EVERETT...AND THEY HAVE
CONTINUED TO EXPAND SINCE THEN. NONE OF THE MODELS SHOWED PRECIP
DEVELOPMENT THIS FAR OUT INTO THE LOWLANDS...BUT ISSUED A WINTER
WEATHER ADVISORY BASED ON EXPANDING RADAR ECHOES AND THE TRENDS THAT
WOULD BE EXPECTED FROM HERE ON OUT. ONSHORE FLOW WILL EVENTUALLY
MODERATE THE AIR MASS FOR A CHANGEOVER TO RAIN AT LOW
ELEVATIONS...BUT THAT WILL NOT TAKE PLACE UNTIL SOMETIME TONIGHT IN
THE PLACES THAT ARE NOW OBSERVING SNOW...SO ADVISORY SNOWFALL
AMOUNTS SEEM PLAUSIBLE WHERE THE ADVISORY IS NOW IN EFFECT. AM
HOPING NOT TO REGRET EXCLUDING THE EASTERN STRAIT AND SEATTLE METRO
AREA ZONES FROM THE ADVISORY. LATEST RADAR TRENDS AT 940 AM MAKE ME
A LITTLE NERVOUS.       HANER

THE UPPER TROUGH WILL MOVE TO HAIDA GWAII (FORMERLY THE QUEEN
CHARLOTTE ISLANDS) TONIGHT AND TO NORTHERN VANCOUVER ISLAND SUNDAY.
MOISTURE WILL CONTINUE TO INCREASE OVER THE AREA TONIGHT FOLLOWED BY
A FRONT SUNDAY. LOW LEVEL FLOW WILL BE ONSHORE THROUGH THIS PERIOD
BUT AIR WILL BE COLD ENOUGH FOR SNOW OVER THE LOWLANDS TONIGHT
BEFORE MOSTLY CHANGING TO RAIN SUNDAY. COULD SEE ADVISORY AMOUNTS
TONIGHT (1-3 INCHES) SOME LOCATIONS... MOST LIKELY NORTHWEST
INTERIOR...EAST PUGET SOUND LOWLANDS...AND HIGHER HILLS AWAY FROM
THE WATER.

THE MOUNTAINS WILL ALSO SEE A LOT OF SNOW SUNDAY MORNING THROUGH
MONDAY MORNING. A WINTER STORM WATCH IS IN EFFECT TO COVER THIS.

THE UPPER TROUGH WILL REMAIN OVER THE EASTERN PACIFIC SUNDAY NIGHT
AND MONDAY KEEPING THE WEATHER COOL AND SHOWERY. COULD DEFINITELY BE
FLIRTING WITH LOWLAND SNOW SOME SPOTS AGAIN FOR THIS TIME-FRAME. AS
ALWAYS...THE DETAILS ARE VERY HARD TO PIN-POINT BUT MESO MODELS SEEM
TO BE HINTING AT SOME SORT OF ENHANCED SNOW BAND FROM WESTERN SKAGIT
COUNTY SOUTHWEST TO PORT TOWNSEND. WILL NEED TO KEEP AN EYE ON THIS
FOR THE NEXT FEW MODEL RUNS. SCHNEIDER

.LONG TERM...FROM PREVIOUS DISCUSSION...THE UPPER TROUGH WILL REMAIN
PARKED OVER THE EASTERN PACIFIC FOR MOST OF NEXT WEEK FOR CONTINUED
COOL AND SHOWERY WEATHER. DEPENDING ON WHICH MODEL IS TO BE
BELIEVED...THE AIR WILL BE COLD ENOUGH TO BE FLIRTING WITH LOWLAND
SNOW EACH DAY. THE GFS SEEMS TO BE THE COLDEST WHILE THE CANADIAN
AND ECMWF SUGGEST WARMER LOW LEVELS AND MOSTLY RAIN. SCHNEIDER

&&

.HYDROLOGY...A COOL AND UNSETTLED PATTERN IS EXPECTED FOR THE NEXT
WEEK. SNOW LEVELS WILL AVERAGE BETWEEN 1000 AND 2000 FEET. ANY
WARM-UPS OR SPIKES IN THE SNOW LEVEL WILL BE BRIEF. THIS COOL
WEATHER WILL NOT FAVOR FLOODING ON AREA RIVERS. FLOODING IS NOT
EXPECTED ON THE GREEN RIVER FOR THE NEXT 10 DAYS. SCHNEIDER

&&

.AVIATION...LATEST INFRARED SATELLITE AND MODEL ANALYSIS SHOWS A
STRONG UPPER LEVEL RIDGED OVER THE NE PAC...WITH NORTH TO NW FLOW
ALOFT OVER W WA. THE IR DOES SHOW A WEAK UPPER LEVEL DISTURBANCE
OVER SOUTHERN B.C. THAT IS SPREADING MID/HIGH LEVEL MOISTURE/CLOUDS
INTO THE REGION. AS A RESULT...LIGHT PRECIP IS EXPECTED ACROSS THE
NORTHERN ZONES WHICH WILL SPREAD FARTHER SOUTH THIS AFTERNOON AND
EVENING. LIGHT SNOW IS POSSIBLE AS THE LOW LEVEL AIR MASS REMAINS
COOL AND DRY...ESPECIALLY AT KCLM...KBLI AND POSSIBLY KPAE. THE
CENTRAL PUGET SOUND AREA WILL REMAIN IN THE RAIN SHADOW WITH
WESTERLY DOWNSLOPE FLOW OFF THE OLYMPICS. MAY SEE A FEW FLURRIES BUT
SIGNIFICANT SNOWFALL IS NOT EXPECTED. PRECIP WILL MAINLY STAY AS
RAIN TONIGHT AS LOW LEVEL ONSHORE FLOW INCREASES...BRINGING WARMER
AIR INLAND.

CIGS...VFR CONDITIONS WILL GRADUALLY DETERIORATE TO MVFR THIS
EVENING...WITH LOCAL IFR CONDITIONS POSSIBLE TONIGHT. 33

KSEA...SOUTHEAST WIND 4-8 KT...BECOMING SOUTH 6-12 KT THIS
AFTERNOON. LIGHT PRECIPITATION WILL LIKELY BEGIN AT KSEA THIS
EVENING...WHICH COULD START AS SNOW. HOWEVER...SIGNIFICANT SNOWFALL
TOTALS ARE NOT EXPECTED...ONLY A FEW FLURRIES OR A LIGHT DUSTING AT
MOST. OVERNIGHT LOWS WILL REMAIN RIGHT ABOVE FREEZING. 33

&&

.MARINE...A WEAK WARM FRONT WILL CLIP W WA TODAY...RESULTING IN
INCREASING SOUTHERLY PRESSURE GRADIENTS ACROSS THE REGION. SMALL
CRAFT ADVISORY WINDS FORECAST ACROSS ALL MARINE ZONES. THE TRAILING
COLD FRONT WILL MOVE INLAND SUNDAY AFTERNOON OR EVENING. A
995-1000MB SURFACE LOW WILL SPIN OFF VANCOUVER ISLAND MON INTO TUE.
A STRONGER SURFACE LOW MAY TRACK NORTH OVER THE OFFSHORE WATERS ON
WED.

IN ADDITION...HAZARDOUS SEAS WILL DEVELOP SUNDAY AS NORTHWEST SWELL
BUILDS TO AROUND 10 FT...PEAKING IN THE 13 TO 15 FT SUNDAY NIGHT...
THEN GRADUALLY SUBSIDING EARLY NEXT WEEK. 33

&&

.AVALANCHE...IF MODEL FORECASTS HOLD FOR THE UPCOMING
WEEKEND...CURRENT UNSTABLE AND WEAK SNOWPACK STRUCTURE OF COLD LOW
DENSITY SNOW LAYERS SHOULD BE INCREASINGLY LOADED AND STRESSED BY
HEAVY SNOWFALL...STRONG WINDS...AND SLIGHT WARMING TOMORROW. THIS
SHOULD RESULT IN VERY DANGEROUS AVALANCHE CONDITIONS WITH AN
INCREASING POTENTIAL FOR LARGE TO VERY LARGE AVALANCHES IN MANY
AREAS. HAVE ISSUED AVALANCHE WATCH TO EMPHASIZE THE DEVELOPING
SITUATION AND WOULD EXPECT THIS TO BE UPGRADED TO A WARNING ON
SATURDAY. BACK COUNTRY TRAVELERS SHOULD MONITOR THE UNFOLDING
SITUATION AND ADJUST BC TRAVEL PLANS ACCORDINGLY.

&&

.SEW WATCHES/WARNINGS/ADVISORIES...

WA...WINTER WEATHER ADVISORY NORTHWEST INTERIOR...EAST PUGET SOUND
     LOWLANDS...EVERETT AND VICINITY.

     WINTER STORM WATCH FOR THE OLYMPICS AND CASCADE WEST SLOPES
     FROM LATE TONIGHT THROUGH MONDAY MORNING.

     AVALANCHE WATCH FOR WASHINGTON CASCADES...OLYMPICS AND NORTHERN
     OREGON CASCADES FOR SUNDAY.

PZ...SMALL CRAFT ADVISORY ALL WATERS.
     SMALL CRAFT ADVISORY GRAYS HARBOR BAR FOR ROUGH BAR CONDITIONS.

WWW.WEATHER.GOV/SEATTLE