Alert archive / Washington / Winter Storm Warnings in 2011
Winter Storm Warning 3, NWS Seattle, WA
NWS Seattle, WA issued this winter storm warning at Feb 21, 2011, 3:14 PM PST for San Juan County, Washington. It took effect at Feb 21, 2011, 8:00 PM PST. It was in force for 55 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Feb 21, 2011, 3:14 PM PST (23:14 UTC)
- In effect from
- Feb 21, 2011, 8:00 PM PST
- Expired
- Feb 24, 2011, 3:12 AM PST
- In force
- 55 hr
- Issued by
- NWS Seattle, WA
County San Juan County, WA
The radar
The Seattle radar (KATX), 54 km from the middle of the area, began a volume at 23:16 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Quillayute State, WA (KUIL), launched 12:00Z, 11.2 hours before the alert went out and 127 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 951 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 45 m²/s²
- 0-3 km storm-relative helicity
- 58 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
442 WWUS46 KSEW 212314 WSWSEW URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE SEATTLE WA 314 PM PST MON FEB 21 2011 .SNOW WILL INCREASE IN THE MOUNTAINS THIS EVENING AND WILL CONTINUE THROUGH TUESDAY NIGHT AS COLD AIR ALOFT AND STRONG NORTHWEST FLOW MOVES INTO WESTERN WASHINGTON. SNOWFALL ACCUMULATIONS OVER A 24-HOUR PERIOD FROM LATE TONIGHT THROUGH TUESDAY NIGHT MAY REACH 18 TO 24 INCHES IN THE CASCADES AND PASSES AND 10 TO 18 INCHES IN THE OLYMPICS. IN THE LOWLANDS...EXPECT BRIEF AND LOCAL ACCUMULATIONS OF SLUSHY SNOW TO OCCUR LATE TONIGHT THROUGH EARLY WEDNESDAY MORNING. THIS IS MOST LIKELY TO OCCUR ON HILLS ABOVE ABOUT 500 FEET TUESDAY MORNING AND ABOVE 300 FEET LATE TUESDAY NIGHT AND EARLY WEDNESDAY MORNING...AND MAINLY WHERE CONVERGENCE ZONES SET UP IN THE NORTH INTERIOR AND NORTHERN PORTIONS OF THE EAST PUGET SOUND LOWLANDS. SNOW LEVELS AN ARCTIC AIR MASS DROPPING SOUTH FROM BRITISH COLUMBIA...COMBINED WITH DEVELOPING LOW PRESSURE OFF THE WASHINGTON COAST WILL GIVE THE POTENTIAL FOR HEAVY SNOW IN THE NORTH INTERIOR OF WESTERN WASHINGTON BEGINNING WEDNESDAY MORNING AND CONTINUING THROUGH THURSDAY MORNING. SNOWFALL IN WESTERN WHATCOM COUNTY AND THE SAN JUAN ISLANDS WILL LIKELY BE ACCOMPANIED BY STRONG NORTHEASTERLY WINDS OF 25 TO 35 MPH AND GUSTS TO 50 MPH. WAZ518-519-221215- /O.UPG.KSEW.WS.A.0003.110222T0400Z-110223T1200Z/ /O.NEW.KSEW.WS.W.0003.110222T0400Z-110223T1200Z/ WEST SLOPES NORTHERN CASCADES AND PASSES- WEST SLOPES CENTRAL CASCADES AND PASSES- 314 PM PST MON FEB 21 2011 ...WINTER STORM WARNING IN EFFECT FROM 8 PM THIS EVENING TO 4 AM PST WEDNESDAY FOR THE WEST SLOPES OF THE NORTH AND CENTRAL CASCADES AND PASSES... THE NATIONAL WEATHER SERVICE IN SEATTLE HAS ISSUED A WINTER STORM WARNING FOR THE WEST SLOPES OF THE NORTH AND CENTRAL CASCADES AND PASSES FOR HEAVY SNOW...WHICH IS IN EFFECT FROM 8 PM THIS EVENING TO 4 AM PST WEDNESDAY. THE WINTER STORM WATCH FOR THIS AREA IS NO LONGER IN EFFECT. * SOME AFFECTED LOCATIONS...SNOQUALMIE PASS...STEVENS PASS... WHITE PASS. * ACCUMULATIONS...18 TO 24 INCH SNOWFALL ACCUMULATIONS ARE LIKELY. HEAVIEST ACCUMULATIONS WILL LIKELY BE IN THE CENTRAL CASCADE PASSES WHERE A CONVERGENCE ZONE SETS UP. * TIMING...TONIGHT THROUGH TUESDAY NIGHT. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNINGS 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. && $$ WAZ513-221215- /O.NEW.KSEW.WW.Y.0015.110222T0400Z-110223T1200Z/ OLYMPICS- 314 PM PST MON FEB 21 2011 ...WINTER WEATHER ADVISORY IN EFFECT FROM 8 PM THIS EVENING TO 4 AM PST WEDNESDAY FOR THE OLYMPICS... THE NATIONAL WEATHER SERVICE IN SEATTLE HAS ISSUED A WINTER WEATHER ADVISORY FOR THE OLYMPICS SNOW...WHICH IS IN EFFECT FROM 8 PM THIS EVENING TO 4 AM PST WEDNESDAY. * SOME AFFECTED LOCATIONS...HURRICANE RIDGE. * ACCUMULATIONS...EXPECT 10-18 INCH SNOWFALL ACCUMULATIONS TONIGHT INTO TUESDAY NIGHT OVER THE OLYMPICS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...SLEET...OR FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ WAZ001-503-505>507-510-514-515-221215- /O.NEW.KSEW.WS.A.0004.110223T1500Z-110224T2000Z/ SAN JUAN COUNTY-WESTERN WHATCOM COUNTY-EAST PUGET SOUND LOWLANDS- WESTERN SKAGIT COUNTY-EVERETT AND VICINITY-ADMIRALTY INLET AREA- EASTERN STRAIT OF JUAN DE FUCA-WESTERN STRAIT OF JUAN DE FUCA- 314 PM PST MON FEB 21 2011 ...WINTER STORM WATCH IN EFFECT FROM WEDNESDAY MORNING THROUGH THURSDAY MORNING FOR THE INTERIOR LOWLANDS OF WESTERN WASHINGTON FROM SNOHOMISH COUNTY AND THE STRAIT OF JUAN DE FUCA NORTHWARD TO THE CANADIAN BORDER...INCLUDING THE EASTERN PUGET SOUND LOWLANDS... THE NATIONAL WEATHER SERVICE IN SEATTLE HAS ISSUED A WINTER STORM WATCH FOR THE INTERIOR LOWLANDS OF WESTERN WASHINGTON FROM SNOHOMISH COUNTY AND THE STRAIT OF JUAN DE FUCA NORTHWARD TO THE CANADIAN BORDER AND INCLUDING THE EASTERN PUGET SOUND LOWLANDS... WHICH IS IN EFFECT FROM WEDNESDAY MORNING THROUGH THURSDAY MORNING. * SOME AFFECTED LOCATIONS...BELLINGHAM...FRIDAY HARBOR...PORT ANGELES...OAK HARBOR...MOUNT VERNON...EVERETT...NORTH BEND. * ACCUMULATIONS...SNOWFALL ACCUMULATIONS OF 4 TO 6 INCHES ARE LIKELY. * TIMING...WHILE BRIEF SLUSHY ACCUMULATIONS ARE POSSIBLE IN SHOWERS LATE TONIGHT THROUGH EARLY WEDNESDAY MORNINGS...THE MAIN PERIOD OF SIGNIFICANT ACCUMULATING SNOW IS EXPECTED TO BEGIN OVER WESTERN WHATCOM COUNTY EARLY WEDNESDAY MORNING AND SLIDE SOUTH THROUGH THE REMAINDER OF THE NORTH INTERIOR AND EAST PUGET SOUND LOWLANDS DURING THE DAY WEDNESDAY. SNOW MAY CONTINUE WEDNESDAY NIGHT INTO THURSDAY MORNING FOR FURTHER ACCUMULATIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WATCH MEANS CONDITIONS ARE FAVORABLE FOR SEVERE WINTER WEATHER. IF YOU MUST TRAVEL IN THE WATCH AREA...CARRY AN EXTRA FLASHLIGHT...FOOD...WATER...AND BLANKETS IN CASE OF EMERGENCY. && $$ ALBRECHT WWW.WEATHER.GOV/SEATTLE
8 follow-up statements
290 WWUS46 KSEW 221229 WSWSEW URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE SEATTLE WA 429 AM PST TUE FEB 22 2011 .SNOW WILL CONTINUE OVER THE MOUNTAIN TODAY AND TONIGHT AS COLD AIR ALOFT AND STRONG NORTHWEST FLOW MOVES INTO WESTERN WASHINGTON. NEW SNOWFALL ACCUMULATIONS BY EARLY WEDNESDAY MORNING COULD BE AS HIGH AS 16 INCHES IN THE CASCADES AND 8 INCHES IN THE OLYMPICS. IN THE LOWLANDS...EXPECT BRIEF AND LOCAL ACCUMULATIONS OF SLUSHY SNOW TO OCCUR THROUGH EARLY WEDNESDAY MORNING. THIS IS MOST LIKELY TO OCCUR ON HILLS ABOVE ABOUT 500 FEET THIS MORNING AND ABOVE 300 FEET TONIGHT AND EARLY WEDNESDAY MORNING...AND MAINLY WHERE CONVERGENCE ZONES SET UP IN THE NORTH INTERIOR AND NORTHERN PORTIONS OF THE EAST PUGET SOUND LOWLANDS. AN ARCTIC AIR MASS DROPPING SOUTH FROM BRITISH COLUMBIA... COMBINED WITH DEVELOPING LOW PRESSURE OFF THE WASHINGTON COAST WILL GIVE THE POTENTIAL FOR HEAVY SNOW OVER ALL OF THE LOWLANDS OF WESTERN WASHINGTON BEGINNING WEDNESDAY AND CONTINUING INTO THURSDAY MORNING. SNOWFALL IN WESTERN WHATCOM COUNTY AND THE SAN JUAN ISLANDS WILL LIKELY BE ACCOMPANIED BY STRONG NORTHEASTERLY WINDS OF 25 TO 35 MPH AND GUSTS TO 50 MPH BY THURSDAY MORNING. WAZ518-519-230015- /O.CON.KSEW.WS.W.0003.000000T0000Z-110223T1200Z/ WEST SLOPES NORTHERN CASCADES AND PASSES- WEST SLOPES CENTRAL CASCADES AND PASSES- 429 AM PST TUE FEB 22 2011 ...WINTER STORM WARNING IN EFFECT UNTIL 4 AM PST WEDNESDAY FOR THE WEST SLOPES OF THE NORTH AND CENTRAL CASCADES AND PASSES... * SOME AFFECTED LOCATIONS...SNOQUALMIE PASS...STEVENS PASS... WHITE PASS. * ACCUMULATIONS...8 TO 16 INCHES OF NEW SNOW THROUGH EARLY WEDNESDAY MORNING. HEAVIEST ACCUMULATIONS WILL LIKELY BE IN THE CENTRAL CASCADE PASSES WHERE CONVERGENCE ZONES SET UP. * TIMING...TODAY AND TONIGHT. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNINGS 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. && $$ WAZ513-230015- /O.CON.KSEW.WW.Y.0015.000000T0000Z-110223T1200Z/ OLYMPICS- 429 AM PST TUE FEB 22 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 AM PST WEDNESDAY FOR THE OLYMPICS... * SOME AFFECTED LOCATIONS...HURRICANE RIDGE. * ACCUMULATIONS...EXPECT ANOTHER 4 TO 8 INCHES OF NEW SNOW THROUGH TONIGHT OVER THE OLYMPICS. 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. && $$ WAZ504-508-509-511-512-516-517-230015- /O.EXA.KSEW.WS.A.0004.110223T1500Z-110224T2000Z/ SOUTHWEST INTERIOR-SEATTLE/BREMERTON AREA-TACOMA AREA- HOOD CANAL AREA-LOWER CHEHALIS VALLEY AREA-NORTH COAST- CENTRAL COAST- 429 AM PST TUE FEB 22 2011 ...WINTER STORM WATCH IN EFFECT FROM WEDNESDAY MORNING THROUGH THURSDAY MORNING FOR THE SEATTLE AREA...HOOD CANAL...SOUTHWEST INTERIOR...LOWER CHEHALIS VALLEY AND THE NORTH AND CENTRAL COAST... * SOME AFFECTED LOCATIONS...SEATTLE...TACOMA...OLYMPIA...CHEHALIS ...SHELTON...HOQUIAM AND FORKS. * ACCUMULATIONS...SNOWFALL ACCUMULATIONS OF UP TO 6 INCHES ARE POSSIBLE. * TIMING...WHILE BRIEF SLUSHY ACCUMULATIONS ARE POSSIBLE IN SHOWERS THROUGH EARLY WEDNESDAY MORNINGS...THE MAIN PERIOD OF SIGNIFICANT ACCUMULATING SNOW IS EXPECTED TO BEGIN OVER THE CENTRAL PUGET SOUND AREA...SOUTHWEST INTERIOR...HOOD CANAL...LOWER CHEHALIS VALLEY AND THE COAST LATE WEDNESDAY MORNING INTO WEDNESDAY AFTERNOON. THE SNOW MAY CONTINUE WEDNESDAY NIGHT INTO THURSDAY MORNING FOR FURTHER ACCUMULATIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WATCH MEANS CONDITIONS ARE FAVORABLE FOR SEVERE WINTER WEATHER. IF YOU MUST TRAVEL IN THE WATCH AREA...CARRY AN EXTRA FLASHLIGHT...FOOD...WATER...AND BLANKETS IN CASE OF EMERGENCY. && $$ WAZ001-503-505>507-510-514-515-230015- /O.CON.KSEW.WS.A.0004.110223T1500Z-110224T2000Z/ SAN JUAN COUNTY-WESTERN WHATCOM COUNTY-EAST PUGET SOUND LOWLANDS- WESTERN SKAGIT COUNTY-EVERETT AND VICINITY-ADMIRALTY INLET AREA- EASTERN STRAIT OF JUAN DE FUCA-WESTERN STRAIT OF JUAN DE FUCA- 429 AM PST TUE FEB 22 2011 ...WINTER STORM WATCH REMAINS IN EFFECT FROM WEDNESDAY MORNING THROUGH THURSDAY MORNING FOR THE INTERIOR LOWLANDS OF WESTERN WASHINGTON FROM SNOHOMISH COUNTY AND THE STRAIT OF JUAN DE FUCA NORTHWARD TO THE CANADIAN BORDER...INCLUDING THE EASTERN PUGET SOUND LOWLANDS... * SOME AFFECTED LOCATIONS...BELLINGHAM...FRIDAY HARBOR...PORT ANGELES...OAK HARBOR...MOUNT VERNON...EVERETT...NORTH BEND. * ACCUMULATIONS...SNOWFALL ACCUMULATIONS OF UP TO 6 INCHES ARE LIKELY. * TIMING...WHILE BRIEF SLUSHY ACCUMULATIONS ARE POSSIBLE IN SHOWERS THROUGH EARLY WEDNESDAY MORNING...THE MAIN PERIOD OF SIGNIFICANT ACCUMULATING SNOW IS EXPECTED TO BEGIN OVER WESTERN WHATCOM COUNTY WEDNESDAY MORNING AND SLIDE SOUTH THROUGH THE REMAINDER OF THE NORTH INTERIOR AND EAST PUGET SOUND LOWLANDS DURING THE DAY WEDNESDAY. SNOW MAY CONTINUE WEDNESDAY NIGHT INTO THURSDAY MORNING FOR FURTHER ACCUMULATIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WATCH MEANS CONDITIONS ARE FAVORABLE FOR SEVERE WINTER WEATHER. IF YOU MUST TRAVEL IN THE WATCH AREA...CARRY AN EXTRA FLASHLIGHT...FOOD...WATER...AND BLANKETS IN CASE OF EMERGENCY. && $$ WWW.WEATHER.GOV/SEATTLE
877 WWUS46 KSEW 221714 WSWSEW URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE SEATTLE WA 914 AM PST TUE FEB 22 2011 .SNOW WILL CONTINUE OVER THE MOUNTAIN TODAY AND TONIGHT AS COLD AIR ALOFT AND STRONG NORTHWEST FLOW MOVES INTO WESTERN WASHINGTON. NEW SNOWFALL ACCUMULATIONS BY EARLY WEDNESDAY MORNING COULD BE AS HIGH AS 16 INCHES IN THE CASCADES AND 8 INCHES IN THE OLYMPICS. AMOUNTS OF UP TO 3 INCHES ARE LIKELY IN THE PUGET SOUND CONVERGENCE ZONE NEAR EVERETT. IN THE LOWLANDS...EXPECT BRIEF AND LOCAL ACCUMULATIONS OF SLUSHY SNOW TO OCCUR THROUGH EARLY WEDNESDAY MORNING. THIS IS MOST LIKELY TO OCCUR ON HILLS ABOVE ABOUT 500 FEET THIS MORNING AND ABOVE 300 FEET TONIGHT AND EARLY WEDNESDAY MORNING...AND MAINLY WHERE CONVERGENCE ZONES SET UP IN THE NORTH INTERIOR AND NORTHERN PORTIONS OF THE EAST PUGET SOUND LOWLANDS. AN ARCTIC AIR MASS DROPPING SOUTH FROM BRITISH COLUMBIA... COMBINED WITH DEVELOPING LOW PRESSURE OFF THE WASHINGTON COAST WILL GIVE THE POTENTIAL FOR HEAVY SNOW OVER ALL OF THE LOWLANDS OF WESTERN WASHINGTON BEGINNING WEDNESDAY AND CONTINUING INTO THURSDAY MORNING. SNOWFALL IN WESTERN WHATCOM COUNTY AND THE SAN JUAN ISLANDS WILL LIKELY BE ACCOMPANIED BY STRONG NORTHEASTERLY WINDS OF 25 TO 35 MPH AND GUSTS TO 50 MPH BY THURSDAY MORNING. WAZ518-519-230100- /O.CON.KSEW.WS.W.0003.000000T0000Z-110223T1200Z/ WEST SLOPES NORTHERN CASCADES AND PASSES- WEST SLOPES CENTRAL CASCADES AND PASSES- 914 AM PST TUE FEB 22 2011 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 4 AM PST WEDNESDAY FOR THE WEST SLOPES OF THE NORTH AND CENTRAL CASCADES AND PASSES... A WINTER STORM WARNING FOR THE WEST SLOPES OF THE NORTH AND CENTRAL CASCADES REMAINS IN EFFECT UNTIL 4 AM PST WEDNESDAY. * SOME AFFECTED LOCATIONS...SNOQUALMIE PASS...STEVENS PASS... WHITE PASS. * ACCUMULATIONS...8 TO 16 INCHES OF NEW SNOW THROUGH EARLY WEDNESDAY MORNING. HEAVIEST ACCUMULATIONS WILL LIKELY BE IN THE CENTRAL CASCADE PASSES WHERE CONVERGENCE ZONES SET UP. * TIMING...TODAY AND TONIGHT. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNINGS 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. && $$ WAZ505-507-510-230100- /O.EXB.KSEW.WW.Y.0015.000000T0000Z-110223T0000Z/ /O.CON.KSEW.WS.A.0004.110223T1500Z-110224T2000Z/ EAST PUGET SOUND LOWLANDS-EVERETT AND VICINITY- ADMIRALTY INLET AREA- 914 AM PST TUE FEB 22 2011 ...WINTER WEATHER ADVISORY FOR SNOW AND SLEET IN EFFECT UNTIL 4 PM PST THIS AFTERNOON... ...WINTER STORM WATCH REMAINS IN EFFECT FROM WEDNESDAY MORNING THROUGH THURSDAY MORNING... THE NATIONAL WEATHER SERVICE IN SEATTLE HAS ISSUED A WINTER WEATHER ADVISORY FOR THE ADMIRALTY INLET AREA...EVERETT AND VICINITY AND THE CASCADE FOOTHILLS NORTH OF DUVALL...WHICH IS IN EFFECT UNTIL 4 PM PST THIS AFTERNOON. A WINTER STORM WATCH REMAINS IN EFFECT FROM WEDNESDAY MORNING THROUGH THURSDAY MORNING. * AFFECTED LOCATIONS...A PUGET SOUND CONVERGENCE ZONE TODAY WILL BRING SNOW AND SLEET IN LOCALIZED BANDS FROM PORT TOWNSEND...ACROSS ADMIRALTY INLET TO SOUTH WHIDBEY ISLAND AND THEN ACROSS SNOHOMISH COUNTY TO THE CASCADE FOOTHILLS NORTH OF DUVALL. * ACCUMULATIONS AND TIMING...LOCALIZED SNOW AND SLEET ACCUMULATIONS OF UP TO 3 INCHES ARE EXPECTED TODAY. ADDITIONAL SNOWFALL ACCUMULATIONS OF UP TO 6 INCHES ARE LIKELY FROM WEDNESDAY THROUGH THURSDAY MORNING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WATCH MEANS CONDITIONS ARE FAVORABLE FOR SEVERE WINTER WEATHER. IF YOU MUST TRAVEL IN THE WATCH AREA...CARRY AN EXTRA FLASHLIGHT...FOOD...WATER...AND BLANKETS IN CASE OF EMERGENCY. && $$ WAZ513-230100- /O.CON.KSEW.WW.Y.0015.000000T0000Z-110223T1200Z/ OLYMPICS- 914 AM PST TUE FEB 22 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 AM PST WEDNESDAY FOR THE OLYMPIC MOUNTAINS... A WINTER WEATHER ADVISORY FOR THE OLYMPIC MOUNTAINS REMAINS IN EFFECT UNTIL 4 AM PST WEDNESDAY. * SOME AFFECTED LOCATIONS...HURRICANE RIDGE. * ACCUMULATIONS...EXPECT ANOTHER 4 TO 8 INCHES OF NEW SNOW THROUGH TONIGHT OVER THE OLYMPICS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...SLEET...OR FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ WAZ001-503-504-506-508-509-511-512-514>517-230100- /O.CON.KSEW.WS.A.0004.110223T1500Z-110224T2000Z/ SAN JUAN COUNTY-WESTERN WHATCOM COUNTY-SOUTHWEST INTERIOR- WESTERN SKAGIT COUNTY-SEATTLE/BREMERTON AREA-TACOMA AREA- HOOD CANAL AREA-LOWER CHEHALIS VALLEY AREA- EASTERN STRAIT OF JUAN DE FUCA-WESTERN STRAIT OF JUAN DE FUCA- NORTH COAST-CENTRAL COAST- 914 AM PST TUE FEB 22 2011 ...WINTER STORM WATCH REMAINS IN EFFECT FROM WEDNESDAY MORNING THROUGH THURSDAY MORNING FOR THE WESTERN WASHINGTON LOWLANDS... A WINTER STORM WATCH FOR THE WESTERN WASHINGTON LOWLANDS REMAINS IN EFFECT FROM WEDNESDAY MORNING THROUGH THURSDAY MORNING. * SOME AFFECTED LOCATIONS...SEATTLE...TACOMA...OLYMPIA... CHEHALIS...SHELTON...HOQUIAM...FORKS...PORT ANGELES... FRIDAY HARBOR AND BELLINGHAM. * ACCUMULATIONS...SNOWFALL ACCUMULATIONS OF UP TO 6 INCHES ARE POSSIBLE FROM WEDNESDAY THROUGH THURSDAY MORNING. * TIMING...WHILE BRIEF SLUSHY ACCUMULATIONS ARE POSSIBLE IN SHOWERS THROUGH EARLY WEDNESDAY MORNINGS...THE MAIN PERIOD OF SIGNIFICANT ACCUMULATING SNOW IS EXPECTED TO BEGIN OVER THE CENTRAL PUGET SOUND AREA...SOUTHWEST INTERIOR...HOOD CANAL... LOWER CHEHALIS VALLEY AND THE COAST LATE WEDNESDAY MORNING INTO WEDNESDAY AFTERNOON. THE SNOW MAY CONTINUE WEDNESDAY NIGHT INTO THURSDAY MORNING FOR FURTHER ACCUMULATIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WATCH MEANS CONDITIONS ARE FAVORABLE FOR SEVERE WINTER WEATHER. IF YOU MUST TRAVEL IN THE WATCH AREA...CARRY AN EXTRA FLASHLIGHT...FOOD...WATER...AND BLANKETS IN CASE OF EMERGENCY. && $$ WWW.WEATHER.GOV/SEATTLE
002 WWUS46 KSEW 222331 WSWSEW URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE SEATTLE WA 331 PM PST TUE FEB 22 2011 .A DEEPENING UPPER LEVEL LOW COMBINED WITH ARCTIC HIGH PRESSURE THAT WILL BE MOVING INTO THE AREA FROM THE NORTH WILL GIVE SNOW LATE TONIGHT THROUGH THURSDAY TO ALL OF WESTERN WASHINGTON... INCLUDING THE LOWLANDS. OVER WESTERN WHATCOM COUNTY AND THE SAN JUANS...STRONG NORTHEAST WINDS OF 25 TO 40 MPH WITH GUSTS TO 60 MPH WILL DEVELOP BY WEDNESDAY AFTERNOON AND WILL CONTINUE THROUGH WEDNESDAY NIGHT BEFORE SLOWLY EASING. HEAVIEST SNOWFALL TOTALS WEDNESDAY THROUGH WEDNESDAY EVENING WILL BE ALONG THE STRAIT OF JUAN DE FUCA...WHERE COLD NORTHEAST WINDS MOVE UPSLOPE INTO THE OLYMPICS. ELSEWHERE IN THE LOWLANDS...SNOWFALL TOTALS ARE EXPECTED TO REACH 2 TO 6 INCHES...WITH LOCALLY HEAVIER AMOUNTS. SNOWFALL WEDNESDAY MORNING WILL BE RATHER WET AND SLUSHY IN NATURE. TEMPERATURES WILL FALL INTO THE 20S FROM NORTH TO SOUTH LATER WEDNESDAY AFTERNOON AND WEDNESDAY EVENING. THEREFORE...A FLASH FREEZE WILL LIKELY AFFECT THE AFTERNOON OR EVENING COMMUTE OVER MUCH OF WESTERN WASHINGTON. THE AIR MASS ALOFT WILL BE QUITE COLD AND UNSTABLE. SO EXPECT THE SNOWFALL TO BE BANDED IN NATURE WITH QUITE A BIT OF LOCAL VARIABILITY. THERE IS A CHANCE THAT SNOW OVER CENTRAL PUGET SOUND LOWLANDS COULD BE ACCOMPANIED BY A CLAP OF THUNDER. MOISTURE MOVING OVER THE TOP OF THE ARCTIC AIR MAY RESULT IN ADDITIONAL ACCUMULATIONS LATER WEDNESDAY NIGHT INTO THURSDAY. WAZ505-507-230715- /O.CAN.KSEW.WW.Y.0015.000000T0000Z-110223T0000Z/ /O.UPG.KSEW.WS.A.0004.110223T1500Z-110224T2000Z/ /O.EXB.KSEW.WS.W.0003.110223T1200Z-110224T1800Z/ EAST PUGET SOUND LOWLANDS-EVERETT AND VICINITY- 331 PM PST TUE FEB 22 2011 ...WINTER STORM WARNING IN EFFECT FROM 4 AM WEDNESDAY TO 10 AM PST THURSDAY FOR THE EAST PUGET SOUND LOWLANDS AND FOR EVERETT AND VICINITY... THE NATIONAL WEATHER SERVICE IN SEATTLE HAS ISSUED A WINTER STORM WARNING FOR THE THE EAST PUGET SOUND LOWLANDS AND FOR EVERETT IN VICINITY FOR HEAVY SNOW...WHICH IS IN EFFECT FROM 4 AM WEDNESDAY TO 10 AM PST THURSDAY. * AFFECTED LOCATIONS...EVERETT...MARYSVILLE...EDMONDS... NORTH BEND...BELLEVUE. * SNOW SHOWERS WILL CONTINUE THIS EVENING BUT WILL GENERALLY PRODUCE SLUSHY ACCUMULATIONS OF AN INCH OR SO. EXPECT SNOW TO INCREASE FROM THE SOUTHWEST DURING THE MORNING HOURS AND CONTINUE AT TIMES THROUGH THURSDAY MORNING. * ACCUMULATIONS LATE TONIGHT THROUGH WEDNESDAY EVENING WILL RANGE FROM 2 TO 6 INCHES. LOCALLY HEAVIER AMOUNTS ARE POSSIBLE WEDNESDAY. ADDITIONAL ACCUMULATIONS ARE POSSIBLE WEDNESDAY NIGHT INTO THURSDAY MORNING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNINGS 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. && $$ WAZ510-230715- /O.CAN.KSEW.WW.Y.0015.000000T0000Z-110223T0000Z/ /O.UPG.KSEW.WS.A.0004.110223T1500Z-110224T2000Z/ /O.EXB.KSEW.WS.W.0003.110223T1200Z-110224T1800Z/ ADMIRALTY INLET AREA- 331 PM PST TUE FEB 22 2011 ...WINTER STORM WARNING IN EFFECT FROM 4 AM WEDNESDAY TO 10 AM PST THURSDAY FOR THE ADMIRALTY INLET AREA... THE NATIONAL WEATHER SERVICE IN SEATTLE HAS ISSUED A WINTER STORM WARNING FOR THE ADMIRALTY INLET AREA FOR HEAVY SNOW...WHICH IS IN EFFECT FROM 4 AM WEDNESDAY TO 10 AM PST THURSDAY. * AFFECTED LOCATIONS...PORT TOWNSEND...OAK HARBOR. * ACCUMULATIONS AND TIMING...ACCUMULATIONS LATE TONIGHT THROUGH WEDNESDAY EVENING WILL RANGE FROM 2 TO 6 INCHES. LOCALLY HEAVIER AMOUNTS ARE POSSIBLE WEDNESDAY. ADDITIONAL ACCUMULATIONS ARE POSSIBLE WEDNESDAY NIGHT INTO THURSDAY MORNING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNINGS 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. && $$ WAZ513-230715- /O.UPG.KSEW.WW.Y.0015.000000T0000Z-110223T1200Z/ /O.EXB.KSEW.WS.W.0003.000000T0000Z-110224T1800Z/ OLYMPICS- 331 PM PST TUE FEB 22 2011 ...WINTER STORM WARNING IN EFFECT UNTIL 10 AM PST THURSDAY FOR THE OLYMPICS... THE NATIONAL WEATHER SERVICE IN SEATTLE HAS ISSUED A WINTER STORM WARNING FOR THE OLYMPICS FOR HEAVY SNOW...WHICH IS IN EFFECT UNTIL 10 AM PST THURSDAY. * SOME AFFECTED LOCATIONS...HURRICANE RIDGE. * ACCUMULATIONS...EXPECT 12 TO 18 INCH ACCUMULATIONS OF NEW SNOW TONIGHT THROUGH WEDNESDAY NIGHT WITH HEAVIEST AMOUNTS ON THE NORTH SLOPES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNINGS MEANS SEVERE WINTER WEATHER IS OCCURRING OR IMMINENT. THOSE PLANNING TRAVEL IN THE WARNED AREA SHOULD BE PREPARED FOR HAZARDOUS...WINTER DRIVING CONDITIONS AND PLAN ACCORDINGLY. && $$ WAZ514-515-230715- /O.UPG.KSEW.WS.A.0004.110223T1500Z-110224T2000Z/ /O.EXB.KSEW.WS.W.0003.110223T1200Z-110224T1800Z/ EASTERN STRAIT OF JUAN DE FUCA-WESTERN STRAIT OF JUAN DE FUCA- 331 PM PST TUE FEB 22 2011 ...WINTER STORM WARNING IN EFFECT FROM 4 AM WEDNESDAY TO 10 AM PST THURSDAY FOR THE STRAIT OF JUAN DE FUCA ZONES... THE NATIONAL WEATHER SERVICE IN SEATTLE HAS ISSUED A WINTER STORM WARNING FOR THE ZONES ADJACENT TO THE STRAIT OF JUAN DE FUCA FOR HEAVY SNOW...WHICH IS IN EFFECT FROM 4 AM WEDNESDAY TO 10 AM PST THURSDAY. * SOME AFFECTED LOCATIONS...SEKIU...PORT ANGELES...SEQUIM. * ACCUMULATIONS...SNOWFALL ACCUMULATIONS OF 6 TO 12 INCHES ARE LIKELY. * TIMING...WHILE BRIEF SLUSHY ACCUMULATIONS ARE POSSIBLE IN SHOWERS THROUGH EARLY WEDNESDAY MORNING...EXPECT HEAVY SNOW WEDNESDAY THROUGH WEDNESDAY EVENING. ADDITIONAL ACCUMULATIONS ARE POSSIBLE LATER WEDNESDAY NIGHT INTO THURSDAY. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNINGS 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. && $$ WAZ001-503-230715- /O.UPG.KSEW.WS.A.0004.110223T1500Z-110224T2000Z/ /O.EXB.KSEW.WS.W.0003.110223T1200Z-110224T1800Z/ SAN JUAN COUNTY-WESTERN WHATCOM COUNTY- 331 PM PST TUE FEB 22 2011 ...WINTER STORM WARNING IN EFFECT FROM 4 AM WEDNESDAY TO 10 AM PST THURSDAY FOR THE SAN JUANS AND WESTERN WHATCOM COUNTY... THE NATIONAL WEATHER SERVICE IN SEATTLE HAS ISSUED A WINTER STORM WARNING FOR THE SAN JUANS AND WESTERN WHATCOM COUNTY FOR HEAVY SNOW...BLOWING SNOW...AND STRONG AND DAMAGING WINDS...WHICH IS IN EFFECT FROM 4 AM WEDNESDAY TO 10 AM PST THURSDAY. * SOME AFFECTED LOCATIONS...BELLINGHAM...EASTSOUND...FRIDAY HARBOR...LYNDEN...SUMAS. * ACCUMULATIONS...SNOWFALL ACCUMULATIONS OF UP TO 6 INCHES ARE POSSIBLE LATE TONIGHT THROUGH WEDNESDAY EVENING. HEAVIEST SNOWFALL AMOUNTS WILL BE ON THE SAN JUANS. * WINDS...EXPECT NORTHEAST WINDS OF 25 TO 40 MPH WITH GUSTS TO 60 MPH TO DEVELOP WEDNESDAY AFTERNOON AND CONTINUE THROUGH WEDNESDAY NIGHT. WINDS WILL SLOWLY EASE ON THURSDAY. * TIMING...WHILE BRIEF SLUSHY ACCUMULATIONS ARE POSSIBLE IN SHOWERS THROUGH THIS EVENING...THE MAIN PERIOD OF SIGNIFICANT ACCUMULATING SNOW IS EXPECTED TO BEGIN LATE TONIGHT AND CONTINUE THROUGH WEDNESDAY. WINDS WILL INCREASE WEDNESDAY AFTERNOON. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNINGS MEANS SEVERE WINTER WEATHER IS OCCURRING OR IMMINENT. THOSE PLANNING TRAVEL IN THE WARNED AREA SHOULD BE PREPARED FOR HAZARDOUS...WINTER DRIVING CONDITIONS AND PLAN ACCORDINGLY. BLOWING SNOW MAY REDUCE VISIBILITIES TO LESS THAN A QUARTER MILE AT TIMES WEDNESDAY AFTERNOON AND WEDNESDAY NIGHT. && $$ WAZ506-230715- /O.UPG.KSEW.WS.A.0004.110223T1500Z-110224T2000Z/ /O.EXB.KSEW.WS.W.0003.110223T1200Z-110224T1800Z/ WESTERN SKAGIT COUNTY- 331 PM PST TUE FEB 22 2011 ...WINTER STORM WARNING IN EFFECT FROM 4 AM WEDNESDAY TO 10 AM PST THURSDAY FOR WESTERN SKAGIT COUNTY... THE NATIONAL WEATHER SERVICE IN SEATTLE HAS ISSUED A WINTER STORM WARNING FOR WESTERN SKAGIT COUNTY FOR HEAVY SNOW...WHICH IS IN EFFECT FROM 4 AM WEDNESDAY TO 10 AM PST THURSDAY. * SOME AFFECTED LOCATIONS...MOUNT VERNON...BURLINGTON. * ACCUMULATIONS...SNOWFALL ACCUMULATIONS OF 2 TO 6 INCHES ARE EXPECTED LATE TONIGHT THROUGH WEDNESDAY EVENING. * TIMING...WHILE BRIEF SLUSHY ACCUMULATIONS ARE POSSIBLE IN SHOWERS THROUGH THIS EVENING...THE MAIN PERIOD OF SIGNIFICANT ACCUMULATING SNOW IS EXPECTED TO BEGIN OVER THE AREA BEGINNING EARLY WEDNESDAY MORNING AND CONTINUING THROUGH WEDNESDAY EVENING. ADDITIONAL ACCUMULATIONS ARE POSSIBLE LATER WEDNESDAY NIGHT INTO THURSDAY MORNING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNINGS 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. && $$ WAZ504-508-509-511-512-516-517-230715- /O.UPG.KSEW.WS.A.0004.110223T1500Z-110224T2000Z/ /O.EXB.KSEW.WS.W.0003.110223T1200Z-110224T1800Z/ SOUTHWEST INTERIOR-SEATTLE/BREMERTON AREA-TACOMA AREA- HOOD CANAL AREA-LOWER CHEHALIS VALLEY AREA-NORTH COAST- CENTRAL COAST- 331 PM PST TUE FEB 22 2011 ...WINTER STORM WARNING IN EFFECT FROM 4 AM WEDNESDAY TO 10 AM PST THURSDAY FOR THE SEATTLE TACOMA METRO AREA...THE KITSAP PENINSULA...THE LOWER CHEHALIS VALLEY...THE NORTH AND CENTRAL WASHINGTON COAST...AND THE SOUTHWEST INTERIOR... THE NATIONAL WEATHER SERVICE IN SEATTLE HAS ISSUED A WINTER STORM WARNING FOR THE SEATTLE TACOMA METRO AREA...THE KITSAP PENINSULA...THE LOWER CHEHALIS VALLEY...THE NORTH AND CENTRAL WASHINGTON COAST...AND THE SOUTHWEST INTERIOR FOR HEAVY SNOW...WHICH IS IN EFFECT FROM 4 AM WEDNESDAY TO 10 AM PST THURSDAY. * SOME AFFECTED LOCATIONS...SEATTLE...TACOMA...OLYMPIA... CHEHALIS...SHELTON...HOQUIAM...AND FORKS. * ACCUMULATIONS...SNOWFALL ACCUMULATIONS OF 2 TO 6 INCHES LATE TONIGHT THROUGH WEDNESDAY EVENING. ADDITIONAL ACCUMULATIONS ARE POSSIBLE LATE WEDNESDAY NIGHT INTO THURSDAY. * TIMING...WHILE BRIEF SLUSHY ACCUMULATIONS ARE POSSIBLE IN SHOWERS THROUGH MUCH OF TONIGHT...THE MAIN PERIOD OF SIGNIFICANT ACCUMULATING SNOW IS EXPECTED TO BEGIN OVER THE AREA DURING THE EARLY MORNING HOURS AND CONTINUE THROUGH WEDNESDAY EVENING. THE SNOW MAY CONTINUE LATE WEDNESDAY NIGHT INTO THURSDAY MORNING FOR FURTHER ACCUMULATIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNINGS MEANS SEVERE WINTER WEATHER IS OCCURRING OR IMMINENT. THOSE PLANNING TRAVEL IN THE WARNED AREA SHOULD BE PREPARED FOR HAZARDOUS...WINTER DRIVING CONDITIONS AND PLAN ACCORDINGLY. && $$ WAZ518-519-230715- /O.EXT.KSEW.WS.W.0003.000000T0000Z-110224T1400Z/ WEST SLOPES NORTHERN CASCADES AND PASSES- WEST SLOPES CENTRAL CASCADES AND PASSES- 331 PM PST TUE FEB 22 2011 ...WINTER STORM WARNING NOW IN EFFECT UNTIL 6 AM PST THURSDAY FOR THE WEST SLOPES OF THE NORTH AND CENTRAL CASCADES AND THE PASSES... THE WINTER STORM WARNING FOR THE WEST SLOPES OF THE NORTH AND CENTRAL CASCADES AND PASSES UNTIL 6 AM PST THURSDAY. * SOME AFFECTED LOCATIONS...SNOQUALMIE PASS...STEVENS PASS... WHITE PASS. * ACCUMULATIONS...12 TO 24 INCHES OF NEW SNOW ARE EXPECTED THROUGH WEDNESDAY. HEAVIEST ACCUMULATIONS WILL LIKELY BE IN THE CENTRAL CASCADE PASSES WITH A CONVERGENCE ZONE THROUGH MIDDAY WEDNESDAY AND AN ARCTIC FRONT WEDNESDAY AFTERNOON. ADDITIONAL ACCUMULATIONS ARE LIKELY WEDNESDAY NIGHT INTO THURSDAY MORNING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNINGS 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. && $$ ALBRECHT/MERCER WWW.WEATHER.GOV/SEATTLE
584 WWUS46 KSEW 230706 WSWSEW URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE SEATTLE WA 1106 PM PST TUE FEB 22 2011 .A RELATIVELY MOIST AND UNSTABLE AIR MASS WILL CONTINUE ACROSS THE AREA THROUGH WEDNESDAY NIGHT FOR LOCALLY HEAVY SNOW SHOWERS. THE HEAVIEST SNOW WILL OCCUR IN BANDS AND WITH THE ARCTIC FRONT THAT WILL MOVE SOUTH ACROSS THE AREA LATE WEDNESDAY THROUGH EARLY THURSDAY. ALSO...ANTICIPATE STRONG AND GUSTY WINDS FROM THE NORTH TO DEVELOP ACROSS THE FAR NORTH INTERIOR LATE WEDNESDAY OR WEDNESDAY NIGHT BEHIND THE FRONT...AND THEN PERSIST. WAZ001-503-231600- /O.EXT.KSEW.WS.W.0003.110223T0706Z-110224T1800Z/ SAN JUAN COUNTY-WESTERN WHATCOM COUNTY- 1106 PM PST TUE FEB 22 2011 ...WINTER STORM WARNING IN EFFECT FOR SAN JUAN AND WESTERN WHATCOM COUNTIES UNTIL 10 AM PST THURSDAY... THE WINTER STORM WARNING IS NOW IN EFFECT UNTIL 10 AM PST THURSDAY. * SOME AFFECTED LOCATIONS...BELLINGHAM...EAST SOUND...FRIDAY HARBOR...LYNDEN...AND SUMAS. * ACCUMULATIONS...SNOWFALL ACCUMULATIONS OF 2 TO 6 INCHES...WITH LOCALLY HIGHER AMOUNTS...ARE EXPECTED BY WEDNESDAY EVENING. * WINDS...WILL INCREASE FROM THE NORTH AT 25 TO 35 MPH WITH GUSTS AS HIGH AS 60 MPH BEHIND AN ARCTIC FRONT WEDNESDAY NIGHT AND CONTINUE THROUGH THURSDAY. * TIMING...THE ARCTIC FRONT IS EXPECTED TO MOVE ACROSS THE AREA LATE WEDNESDAY. EXPECT SNOW SHOWERS TO OCCUR BEFORE THE FRONT ARRIVES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNINGS MEANS SEVERE WINTER WEATHER IS OCCURRING OR IMMINENT. THOSE PLANNING TRAVEL IN THE WARNED AREA SHOULD BE PREPARED FOR HAZARDOUS...WINTER DRIVING CONDITIONS AND PLAN ACCORDINGLY. BLOWING SNOW MAY REDUCE VISIBILITIES TO LESS THAN A QUARTER MILE AT TIMES LATE WEDNESDAY OR WEDNESDAY NIGHT. && $$ WAZ506-507-510-231600- /O.EXT.KSEW.WS.W.0003.110223T0706Z-110224T1800Z/ WESTERN SKAGIT COUNTY-EVERETT AND VICINITY-ADMIRALTY INLET AREA- 1106 PM PST TUE FEB 22 2011 ...WINTER STORM WARNING IN EFFECT FOR THE ADMIRALTY INLET AREA... WESTERN SKAGIT COUNTY...AND EVERETT AND VICINITY UNTIL 10 AM PST... THE WINTER STORM WARNING IS NOW IN EFFECT UNTIL 10 AM PST THURSDAY. * AFFECTED LOCATIONS...MOUNT VERNON...OAK HARBOR...PORT TOWNSEDN...ARLINGTON...MARYSVILLE...EVERETT...AND EDMONDS. * ACCUMULATIONS OF 1 TO 3 INCHES ARE LIKELY OVERNIGHT...MAINLY FROM ABOUT ARLINGTON NORTHWARD. EXPECT ANOTHER 2 TO 6 INCHES ACROSS THE AREA BY WEDNESDAY EVENING. * TIMING...AN ARCTIC FRONT IS EXPECTED TO MOVE ACROSS THE AREA EARLY WEDNESDAY EVENING. THE HEAVIEST PRECIPITATION WILL LIKELY OCCUR WITH AND AHEAD OF THE FRONT. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNINGS 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. && $$ WAZ518-519-231600- /O.CON.KSEW.WS.W.0003.000000T0000Z-110224T1400Z/ WEST SLOPES NORTHERN CASCADES AND PASSES- WEST SLOPES CENTRAL CASCADES AND PASSES- 1106 PM PST TUE FEB 22 2011 ...WINTER STORM WARNING REMAINS IN EFFECT FOR THE NORTHERN AND CENTRAL CASCADES UNTIL 6 AM PST THURSDAY... A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 AM PST THURSDAY. * SOME AFFECTED LOCATIONS...CONCRETE...DARRINGTON...SNOQUALMIE PASS...STEVENS PASS...WHITE PASS...PARADISE...AND PACKWOOD. * ACCUMULATIONS...1 TO 2 FEET OF NEW SNOW IS LIKELY BY THURSDAY MORNING...WITH THE HEAVIEST SNOW FALLING ABOVE THE 2000 FOOT LEVEL. * TIMING...AN ARCTIC FRONT WILL MOVE FROM NORTH TO SOUTH ACROSS THE AREA LATE WEDNESDAY THROUGH THURSDAY MORNING. THE HEAVIEST SNOW WILL OCCUR AHEAD OF AND WITH THE FRONT. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNINGS MEANS SEVERE WINTER WEATHER IS OCCURRING OR IMMINENT. THOSE PLANNING TRAVEL IN THE WARNED AREA SHOULD BE PREPARED FOR HAZARDOUS...WINTER DRIVING CONDITIONS AND PLAN ACCORDINGLY. && $$ WAZ513-231600- /O.CON.KSEW.WS.W.0003.000000T0000Z-110224T1800Z/ OLYMPICS- 1106 PM PST TUE FEB 22 2011 ...WINTER STORM WARNING REMAINS IN EFFECT FOR THE OLYMPICS UNTIL 10 AM PST THURSDAY... A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 10 AM PST THURSDAY. * SOME AFFECTED LOCATIONS...HURRICANE RIDGE. * ACCUMULATIONS...12 TO 18 INCHES OF NEW SNOW BY WEDNESDAY EVENING...WITH THE HEAVIEST SNOW LIKELY FALLING ON THE NORTH FACING SLOPES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNINGS 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. && $$ WAZ514-515-231600- /O.CON.KSEW.WS.W.0003.110223T1200Z-110224T1800Z/ EASTERN STRAIT OF JUAN DE FUCA-WESTERN STRAIT OF JUAN DE FUCA- 1106 PM PST TUE FEB 22 2011 ...WINTER STORM WARNING REMAINS IN EFFECT FOR THE STRAIT OF JUAN DE FUCA FROM 4 AM WEDNESDAY TO 10 AM PST THURSDAY... A WINTER STORM WARNING REMAINS IN EFFECT FROM 4 AM WEDNESDAY TO 10 AM PST THURSDAY. * SOME AFFECTED LOCATIONS...SEKIU...PORT ANGELES...AND SEQUIM. * ACCUMULATIONS...6 TO 12 INCHES ARE LIKELY BY LATE THURSDAY MORNING. * TIMING...THE HEAVIEST SNOW IS EXPECTED TO OCCUR DURING THE DAY WEDNESDAY...POSSIBLY CONTINUING THROUGH WEDNESDAY EVENING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNINGS MEANS SEVERE WINTER WEATHER IS OCCURRING OR IMMINENT. THOSE PLANNING TRAVEL IN THE WARNED AREA SHOULD BE PREPARED FOR HAZARDOUS...WINTER DRIVING CONDITIONS AND PLAN ACCORDINGLY. && $$ WAZ504-505-508-509-511-512-516-517-231600- /O.CON.KSEW.WS.W.0003.110223T1200Z-110224T1800Z/ SOUTHWEST INTERIOR-EAST PUGET SOUND LOWLANDS- SEATTLE/BREMERTON AREA-TACOMA AREA-HOOD CANAL AREA- LOWER CHEHALIS VALLEY AREA-NORTH COAST-CENTRAL COAST- 1106 PM PST TUE FEB 22 2011 ...WINTER STORM WARNING REMAINS IN EFFECT FOR THE PUGET SOUND REGION...INCLUDING THE EAST PUGET SOUND LOWLANDS AND HOOD CANAL... THE SOUTHWEST INTERIOR...AND THE COAST FROM 4 AM WEDNESDAY TO 10 AM PST THURSDAY... A WINTER STORM WARNING REMAINS IN EFFECT FROM 4 AM WEDNESDAY TO 10 AM PST THURSDAY. * SOME AFFECTED LOCATIONS...SEATTLE...BREMERTON...CARNATION... MONROE...NORTH BEND...BUCKLEY...TACOMA...PUYALUP...SHELTON... OLYMPIA...CHEHALIS...MONTESANO...HOQUIAM...AND FORKS. * ACCUMULATIONS...UP TO 3 INCHES OF SNOW IS POSSIBLE OVER MAINLY THE EAST PUGET SOUND LOWLANDS OVERNIGHT. HOWEVER MUCH OF THE SNOW WILL OCCUR WEDNESDAY AND WEDNESDAY NIGHT. DURING THIS PERIOD AN AVERAGE OF 2 TO 6 INCHES OF NEW SNOW TOTAL IS EXPECTED...ALTHOUGH THERE WILL BE LOCALLY HIGHER AMOUNTS. * TIMING...AN ARCTIC FRONT WILL MOVE FROM NORTH TO SOUTH ACROSS THE AREA WEDNESDAY NIGHT THROUGH THURSDAY MORNING. THE HEAVIEST SNOW WILL OCCUR AHEAD OF AND WITH THE FRONT. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNINGS 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. && $$ WWW.WEATHER.GOV/SEATTLE
201 WWUS46 KSEW 231613 WSWSEW URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE SEATTLE WA 813 AM PST WED FEB 23 2011 .A COLD AND MOIST WEATHER SYSTEM WILL BRING AREAS OF HEAVY SNOW TO WESTERN WASHINGTON TODAY THROUGH THURSDAY MORNING. MUCH OF THE SNOW WILL COME IN HEAVY BURSTS WITH SHOWERS OR LOCALIZED BANDS OF INTENSE SNOW. THIS WILL MAKE SNOWFALL TOTALS HIGHLY VARIABLE FROM PLACE TO PLACE. ALSO...FRASER OUTFLOW WINDS WILL CAUSE STRONG AND GUSTY NORTHEAST WINDS TO DEVELOP ACROSS THE FAR NORTH INTERIOR THIS AFTERNOON AND THEN PERSIST THROUGH THURSDAY. WAZ518-519-240100- /O.CON.KSEW.WS.W.0003.000000T0000Z-110224T1400Z/ WEST SLOPES NORTHERN CASCADES AND PASSES- WEST SLOPES CENTRAL CASCADES AND PASSES- 813 AM PST WED FEB 23 2011 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 AM PST THURSDAY FOR THE NORTH AND CENTRAL CASCADES... A WINTER STORM WARNING FOR THE NORTH AND CENTRAL CASCADES REMAINS IN EFFECT UNTIL 6 AM PST THURSDAY. * SOME AFFECTED LOCATIONS...CONCRETE...DARRINGTON...SNOQUALMIE PASS...STEVENS PASS...WHITE PASS...PARADISE...AND PACKWOOD. * ACCUMULATIONS...6 TO 12 INCHES OF SNOW ARE EXPECTED TODAY IN THE CASCADES. BY THURSDAY MORNING...STORM TOTAL ACCUMULATIONS WILL REACH 1 TO 2 FEET. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNINGS MEANS SEVERE WINTER WEATHER IS OCCURRING OR IMMINENT. THOSE PLANNING TRAVEL IN THE WARNED AREA SHOULD BE PREPARED FOR HAZARDOUS...WINTER DRIVING CONDITIONS AND PLAN ACCORDINGLY. && $$ WAZ513-240100- /O.CON.KSEW.WS.W.0003.000000T0000Z-110224T1800Z/ OLYMPICS- 813 AM PST WED FEB 23 2011 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 10 AM PST THURSDAY FOR THE OLYMPIC MOUNTAINS... A WINTER STORM WARNING FOR THE OLYMPIC MOUNTAINS REMAINS IN EFFECT UNTIL 10 AM PST THURSDAY. * SOME AFFECTED LOCATIONS...HURRICANE RIDGE. * ACCUMULATIONS...6 TO 12 INCHES OF SNOW ARE EXPECTED TODAY OVER THE OLYMPIC MOUNTAINS. BY THURSDAY MORNING...STORM TOTAL ACCUMULATIONS OF 12 TO 18 INCHES ARE LIKELY. THE HEAVIEST SNOW LIKELY FALLING ON THE NORTH FACING SLOPES FACING THE STRAIT OF JUAN DE FUCA. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNINGS 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. && $$ WAZ514-515-240100- /O.CON.KSEW.WS.W.0003.000000T0000Z-110224T1800Z/ EASTERN STRAIT OF JUAN DE FUCA-WESTERN STRAIT OF JUAN DE FUCA- 813 AM PST WED FEB 23 2011 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 10 AM PST THURSDAY FOR THE LAND AREAS ALONG THE STRAIT OF JUAN DE FUCA... A WINTER STORM WARNING FOR LAND AREAS ALONG THE STRAIT OF JUAN DE FUCA REMAINS IN EFFECT UNTIL 10 AM PST THURSDAY. * SOME AFFECTED LOCATIONS...SEKIU...PORT ANGELES...AND SEQUIM. * ACCUMULATIONS...6 TO 12 INCHES OF SNOW ARE LIKELY THROUGH TONIGHT WITH ADDITIONAL AMOUNTS POSSIBLE ON THURSDAY. HEAVIEST SNOWFALL AMOUNTS IN THIS WEATHER PATTERN OFTEN TAKE PLACE IN THE INDIAN VALLEY AREA SOUTHWEST OF PORT ANGELES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNINGS MEANS SEVERE WINTER WEATHER IS OCCURRING OR IMMINENT. THOSE PLANNING TRAVEL IN THE WARNED AREA SHOULD BE PREPARED FOR HAZARDOUS...WINTER DRIVING CONDITIONS AND PLAN ACCORDINGLY. && $$ WAZ001-503-240100- /O.CON.KSEW.WS.W.0003.000000T0000Z-110224T1800Z/ SAN JUAN COUNTY-WESTERN WHATCOM COUNTY- 813 AM PST WED FEB 23 2011 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 10 AM PST THURSDAY FOR THE BELLINGHAM AREA AND SAN JUAN ISLANDS... A WINTER STORM WARNING FOR THE BELLINGHAM AREA AND THE SAN JUAN ISLANDS REMAINS IN EFFECT UNTIL 10 AM PST THURSDAY. * SOME AFFECTED LOCATIONS...BELLINGHAM...EAST SOUND...FRIDAY HARBOR...LYNDEN...AND SUMAS. * ACCUMULATIONS...SNOWFALL ACCUMULATIONS OF 3 TO 7 INCHES ARE EXPECTED BY EVENING. * WINDS...STRONG FRASER OUTFLOW WILL CAUSE NORTHEAST WINDS TO INCREASE...REACHING 25 TO 35 MPH WITH GUSTS AS HIGH AS 60 MPH THIS AFTERNOON AND CONTINUING THROUGH THURSDAY. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNINGS 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. BLOWING SNOW MAY REDUCE VISIBILITIES TO LESS THAN A QUARTER MILE AT TIMES LATE WEDNESDAY OR WEDNESDAY NIGHT. && $$ WAZ506-507-510-240100- /O.CON.KSEW.WS.W.0003.000000T0000Z-110224T1800Z/ WESTERN SKAGIT COUNTY-EVERETT AND VICINITY-ADMIRALTY INLET AREA- 813 AM PST WED FEB 23 2011 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 10 AM PST THURSDAY... A WINTER STORM WARNING FOR THE EVERETT AND VICINITY...THE ADMIRALTY INLET AREA AND WESTERN SKAGIT COUNTY REMAINS IN EFFECT UNTIL 10 AM PST THURSDAY. * AFFECTED LOCATIONS...MOUNT VERNON...OAK HARBOR...PORT TOWNSEDN...ARLINGTON...MARYSVILLE...EVERETT...AND EDMONDS. * SNOW ACCUMULATIONS OF 3 TO 7 INCHES ARE LIKELY THROUGH TODAY. ADDITIONAL AMOUNTS OF UP TO 6 INCHES ARE POSSIBLE TONIGHT. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNINGS MEANS SEVERE WINTER WEATHER IS OCCURRING OR IMMINENT. THOSE PLANNING TRAVEL IN THE WARNED AREA SHOULD BE PREPARED FOR HAZARDOUS...WINTER DRIVING CONDITIONS AND PLAN ACCORDINGLY. && $$ WAZ508-509-511-240100- /O.CON.KSEW.WS.W.0003.000000T0000Z-110224T1800Z/ SEATTLE/BREMERTON AREA-TACOMA AREA-HOOD CANAL AREA- 813 AM PST WED FEB 23 2011 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 10 AM PST THURSDAY FOR THE THE SEATTLE-TACOMA METRO AREA... A WINTER STORM WARNING FOR THE SEATTLE-TACOMA METRO AREAS... INCLUDING THE KITSAP PENINSULA AND HOOD CANAL AREAS...REMAINS IN EFFECT UNTIL 10 AM PST THURSDAY. * SOME AFFECTED LOCATIONS...SEATTLE...BREMERTON...TACOMA... PUYALLUP...AND SHELTON. * ACCUMULATIONS...1 OR 2 INCHES OF SLUSHY SNOW ACCUMULATION ARE EXPECTED TODAY IN SHOWERS. HEAVIER SNOW WILL COME TONIGHT...WHEN UP TO AN ADDITIONAL 6 INCHES OF ACCUMULATION ARE POSSIBLE. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNINGS 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. && $$ WAZ504-512-516-517-240100- /O.CON.KSEW.WS.W.0003.000000T0000Z-110224T1800Z/ SOUTHWEST INTERIOR-LOWER CHEHALIS VALLEY AREA-NORTH COAST- CENTRAL COAST- 813 AM PST WED FEB 23 2011 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 10 AM PST THURSDAY FOR THE COAST AND SOUTHWEST INTERIOR... A WINTER STORM WARNING FOR THE COAST AND SOUTHWEST INTERIOR REMAINS IN EFFECT UNTIL 10 AM PST THURSDAY. * SOME AFFECTED LOCATIONS...OLYMPIA...CHEHALIS...MONTESANO... HOQUIAM...AND FORKS. * ACCUMULATIONS...1 TO 6 INCHES OF SNOW ACCUMULATION ARE EXPECTED TODAY. MUCH OF THE SNOW WILL COME IN BRIEF AND INTENSE BURSTS OR HEAVY SHOWERS. ELEVATIONS NEAR SEA LEVEL MAY REMAIN WARM ENOUGH TO LIMIT ACCUMULATIONS...BUT ELEVATIONS ABOVE A COUPLE HUNDRED FEET THAT GET REPEATED SHOWERS WILL EXPERIENCE THE HEAVIER AMOUNTS. ADDITIONAL AMOUNTS ARE POSSIBLE TONIGHT. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNINGS MEANS SEVERE WINTER WEATHER IS OCCURRING OR IMMINENT. THOSE PLANNING TRAVEL IN THE WARNED AREA SHOULD BE PREPARED FOR HAZARDOUS...WINTER DRIVING CONDITIONS AND PLAN ACCORDINGLY. && $$ WAZ505-240100- /O.CON.KSEW.WS.W.0003.000000T0000Z-110224T1800Z/ EAST PUGET SOUND LOWLANDS- 813 AM PST WED FEB 23 2011 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 10 AM PST THURSDAY FOR THE THE EAST PUGET SOUND LOWLANDS... A WINTER STORM WARNING FOR THE EAST PUGET SOUND LOWLANDS REMAINS IN EFFECT UNTIL 10 AM PST THURSDAY. * SOME AFFECTED LOCATIONS...NORTH BEND...BUCKLEY...ENUMCLAW AND MONROE. * ACCUMULATIONS...3 TO 5 INCHES OF SNOW ACCUMULATION ARE EXPECTED TODAY ON HIGHER TERRAIN EAST OF INTERSTATE 405 AND HIGHWAYS 527 AND 167. SLUSHIER ACCUMULATIONS OF 1 OR 2 INCHES ARE EXPECTED TODAY FOR LOWER ELEVATIONS ALONG THE I-405 CORRIDOR. HEAVIER SNOWFALL WITH ACCUMULATIONS OF UP TO 6 INCHES ARE EXPECTED TONIGHT. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNINGS 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. && $$ HANER WWW.WEATHER.GOV/SEATTLE
904 WWUS46 KSEW 232340 WSWSEW URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE SEATTLE WA 340 PM PST WED FEB 23 2011 .A COLD AND MOIST WEATHER SYSTEM WILL BRING AREAS OF HEAVY SNOW TO WESTERN WASHINGTON THIS EVENING THROUGH THURSDAY MORNING. MUCH OF THE SNOW WILL COME IN HEAVY BURSTS WITH SHOWERS OR LOCALIZED BANDS OF INTENSE SNOW. THIS WILL MAKE SNOWFALL TOTALS HIGHLY VARIABLE FROM PLACE TO PLACE. WAZ503-240045- /O.CAN.KSEW.WS.W.0003.000000T0000Z-110224T1800Z/ WESTERN WHATCOM COUNTY- 340 PM PST WED FEB 23 2011 ...WINTER STORM WARNING IS CANCELLED FOR THE WESTERN WHATCOM COUNTY... THE NATIONAL WEATHER SERVICE IN SEATTLE HAS CANCELLED THE WINTER STORM WARNING FOR WESTERN WHATCOM COUNTY. THE THREAT FOR HEAVY SNOW IN WESTERN WHATCOM COUNTY HAS DIMINISHED AS COLD AND DRY AIR FILTERS SOUTHWEST OUT OF THE FRASER RIVER VALLEY. $$ WAZ518-519-240745- /O.CON.KSEW.WS.W.0003.000000T0000Z-110224T1400Z/ WEST SLOPES NORTHERN CASCADES AND PASSES- WEST SLOPES CENTRAL CASCADES AND PASSES- 340 PM PST WED FEB 23 2011 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 AM PST THURSDAY FOR THE WEST SLOPES OF THE NORTH AND CENTRAL CASCADES AND PASSES... A WINTER STORM WARNING FOR THE WEST SLOPES OF THE NORTH AND CENTRAL CASCADES AND PASSES REMAINS IN EFFECT UNTIL 6 AM PST THURSDAY. * SOME AFFECTED LOCATIONS...CONCRETE...DARRINGTON...SNOQUALMIE PASS...STEVENS PASS...WHITE PASS...PARADISE...AND PACKWOOD. * ACCUMULATIONS...8 TO 15 INCHES OF NEW SNOW ARE ARE EXPECTED TONIGHT IN THE CASCADES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNINGS 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. && $$ WAZ513-240745- /O.CON.KSEW.WS.W.0003.000000T0000Z-110224T1800Z/ OLYMPICS- 340 PM PST WED FEB 23 2011 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 10 AM PST THURSDAY FOR THE OLYMPICS... A WINTER STORM WARNING FOR THE OLYMPICS REMAINS IN EFFECT UNTIL 10 AM PST THURSDAY. * SOME AFFECTED LOCATIONS...HURRICANE RIDGE. * ACCUMULATIONS...AROUND 12 INCHES OF SNOW ARE EXPECTED TONIGHT ALONG THE NORTH SLOPES OF THE OLYMPIC MOUNTAINS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNINGS MEANS SEVERE WINTER WEATHER IS OCCURRING OR IMMINENT. THOSE PLANNING TRAVEL IN THE WARNED AREA SHOULD BE PREPARED FOR HAZARDOUS...WINTER DRIVING CONDITIONS AND PLAN ACCORDINGLY. && $$ WAZ514-515-240745- /O.CON.KSEW.WS.W.0003.000000T0000Z-110224T1800Z/ EASTERN STRAIT OF JUAN DE FUCA-WESTERN STRAIT OF JUAN DE FUCA- 340 PM PST WED FEB 23 2011 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 10 AM PST THURSDAY FOR THE ZONES ALONG THE STRAIT OF JUAN DE FUCA... A WINTER STORM WARNING FOR THE STRAIT OF JUAN DE FUCA ZONES REMAINS IN EFFECT UNTIL 10 AM PST THURSDAY. * SOME AFFECTED LOCATIONS...SEKIU...PORT ANGELES...AND SEQUIM. * ACCUMULATIONS...SNOW ACCUMULATIONS OF 3 TO 6 INCHES ARE EXPECTED TONIGHT WITH ANOTHER 2 OR 3 INCHES THURSDAY MORNING. HEAVIEST AMOUNTS WILL BE AWAY FROM THE WATER. THE HEAVY SNOW WILL FALL IN HEAVY BURSTS THAT MAY RESULT IN SNOWFALL RATES OF 2 INCHES IN AN HOUR AT TIMES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNINGS 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. && $$ WAZ001-240745- /O.CON.KSEW.WS.W.0003.000000T0000Z-110224T1800Z/ SAN JUAN COUNTY- 340 PM PST WED FEB 23 2011 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 10 AM PST THURSDAY FOR THE SAN JUAN ISLANDS... A WINTER STORM WARNING FOR THE SAN JUAN ISLANDS REMAINS IN EFFECT UNTIL 10 AM PST THURSDAY. * SOME AFFECTED LOCATIONS...EAST SOUND AND FRIDAY HARBOR. * ACCUMULATIONS...SNOWFALL ACCUMULATIONS OF 3 TO 5 INCHES THIS EVENING...WITH HEAVIEST AMOUNTS AROUND SOUTHERN SAN JUAN ISLAND. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNINGS MEANS SEVERE WINTER WEATHER IS OCCURRING OR IMMINENT. THOSE PLANNING TRAVEL IN THE WARNED AREA SHOULD BE PREPARED FOR HAZARDOUS...WINTER DRIVING CONDITIONS AND PLAN ACCORDINGLY. && $$ WAZ506-507-510-240745- /O.CON.KSEW.WS.W.0003.000000T0000Z-110224T1800Z/ WESTERN SKAGIT COUNTY-EVERETT AND VICINITY-ADMIRALTY INLET AREA- 340 PM PST WED FEB 23 2011 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 10 AM PST THURSDAY FOR WESTERN SKAGIT COUNTY...EVERETT AND VICINITY...AND THE ADMIRALTY INLET AREA... A WINTER STORM WARNING FOR WESTERN SKAGIT COUNTY...EVERETT AND VICINITY...AND THE ADMIRALTY INLET AREA REMAINS IN EFFECT UNTIL 10 AM PST THURSDAY. * AFFECTED LOCATIONS...MOUNT VERNON...OAK HARBOR...PORT TOWNSEND...ARLINGTON...MARYSVILLE...EVERETT...AND EDMONDS. * SNOW ACCUMULATIONS OF 3 TO 5 INCHES ARE LIKELY TONIGHT WITH AN ADDITIONAL INCH OR TWO POSSIBLE THURSDAY MORNING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNINGS 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. && $$ WAZ508-509-511-240745- /O.CON.KSEW.WS.W.0003.000000T0000Z-110224T1800Z/ SEATTLE/BREMERTON AREA-TACOMA AREA-HOOD CANAL AREA- 340 PM PST WED FEB 23 2011 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 10 AM PST THURSDAY FOR THE SEATTLE/BREMERTON AREA...TACOMA AREA...AND HOOD CANAL AREA... A WINTER STORM WARNING FOR THE SEATTLE/BREMERTON AREA...TACOMA AREA...AND HOOD CANAL AREA REMAINS IN EFFECT UNTIL 10 AM PST THURSDAY. * SOME AFFECTED LOCATIONS...SEATTLE...BREMERTON...TACOMA... PUYALLUP...AND SHELTON. * ACCUMULATIONS...SNOW ACCUMULATIONS OF 1 TO 4 INCHES ARE LIKELY TONIGHT AS AN ARCTIC FRONT DROPS SOUTH. ANOTHER INCH OR TWO MAY FALL THURSDAY MORNING AS MOISTURE OVERRUNS THE ARCTIC AIR. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNINGS MEANS SEVERE WINTER WEATHER IS OCCURRING OR IMMINENT. THOSE PLANNING TRAVEL IN THE WARNED AREA SHOULD BE PREPARED FOR HAZARDOUS...WINTER DRIVING CONDITIONS AND PLAN ACCORDINGLY. && $$ WAZ504-512-516-517-240745- /O.CON.KSEW.WS.W.0003.000000T0000Z-110224T1800Z/ SOUTHWEST INTERIOR-LOWER CHEHALIS VALLEY AREA-NORTH COAST- CENTRAL COAST- 340 PM PST WED FEB 23 2011 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 10 AM PST THURSDAY FOR THE SOUTHWEST INTERIOR...LOWER CHEHALIS VALLEY...AND THE NORTH AND CENTRAL WASHINGTON COAST... A WINTER STORM WARNING FOR THE SOUTHWEST INTERIOR...LOWER CHEHALIS VALLEY...AND THE NORTH AND CENTRAL WASHINGTON COAST... * SOME AFFECTED LOCATIONS...OLYMPIA...CHEHALIS...MONTESANO... HOQUIAM...AND FORKS. * ACCUMULATIONS...1 TO 4 INCHES OF SNOW TONIGHT AND POSSIBLY ANOTHER 1 TO 3 INCHES ON THURSDAY. MUCH OF THE SNOW WILL COME IN BRIEF AND INTENSE BURSTS OR HEAVY SHOWERS. ELEVATIONS NEAR SEA LEVEL MAY REMAIN WARM ENOUGH TO LIMIT ACCUMULATIONS...BUT ELEVATIONS ABOVE A COUPLE HUNDRED FEET THAT GET REPEATED SHOWERS WILL EXPERIENCE THE HEAVIER AMOUNTS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNINGS 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. && $$ WAZ505-240745- /O.CON.KSEW.WS.W.0003.000000T0000Z-110224T1800Z/ EAST PUGET SOUND LOWLANDS- 340 PM PST WED FEB 23 2011 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 10 AM PST THURSDAY FOR THE EAST PUGET SOUND LOWLANDS... A WINTER STORM WARNING FOR THE EAST PUGET SOUND LOWLANDS REMAINS IN EFFECT UNTIL 10 AM PST THURSDAY. * SOME AFFECTED LOCATIONS...NORTH BEND...BUCKLEY...ENUMCLAW AND MONROE. * ACCUMULATIONS...2 TO 5 INCH SNOW ACCUMULATION IS EXPECTED TONIGHT...WITH HEAVIEST AMOUNTS TOWARD THE CASCADES. ANOTHER INCH OR TWO IS POSSIBLE FROM ENUMCLAW SOUTHWARD THURSDAY MORNING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNINGS MEANS SEVERE WINTER WEATHER IS OCCURRING OR IMMINENT. THOSE PLANNING TRAVEL IN THE WARNED AREA SHOULD BE PREPARED FOR HAZARDOUS...WINTER DRIVING CONDITIONS AND PLAN ACCORDINGLY. && $$ ALBRECHT WWW.WEATHER.GOV/SEATTLE
464 WWUS46 KSEW 240343 WSWSEW URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE SEATTLE WA 743 PM PST WED FEB 23 2011 .A COLD AND MOIST WEATHER SYSTEM WILL BRING AREAS OF HEAVY SNOW TO WESTERN WASHINGTON THIS EVENING THROUGH THURSDAY MORNING. THE SNOW WILL COME IN SHOWERS OR LOCALIZED BANDS OF INTENSE SNOW. THIS WILL MAKE SNOWFALL TOTALS HIGHLY VARIABLE FROM PLACE TO PLACE. WAZ504-508-509-512-516-517-241330- /O.CAN.KSEW.WS.W.0003.000000T0000Z-110224T1800Z/ /O.NEW.KSEW.WW.Y.0016.110224T0343Z-110224T1800Z/ SOUTHWEST INTERIOR-SEATTLE/BREMERTON AREA-TACOMA AREA- LOWER CHEHALIS VALLEY AREA-NORTH COAST-CENTRAL COAST- 743 PM PST WED FEB 23 2011 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL 10 AM PST THURSDAY FOR THE SOUTHWEST INTERIOR...SEATTLE/BREMERTON AREA...TACOMA AREA...LOWER CHEHALIS VALLEY AREA...NORTH COAST...AND CENTRAL COAST... ...WINTER STORM WARNING IS CANCELLED FOR THE SOUTHWEST INTERIOR... SEATTLE/BREMERTON AREA...TACOMA AREA...LOWER CHEHALIS VALLEY AREA... NORTH COAST...AND CENTRAL COAST... THE NATIONAL WEATHER SERVICE IN SEATTLE HAS ISSUED A WINTER WEATHER ADVISORY FOR THE SOUTHWEST INTERIOR...SEATTLE/BREMERTON AREA...TACOMA AREA...LOWER CHEHALIS VALLEY AREA...NORTH COAST...AND CENTRAL COAST...FOR SNOW...WHICH IS IN EFFECT UNTIL 10 AM PST THURSDAY. THE WINTER STORM WARNING HAS BEEN CANCELLED. * SOME AFFECTED LOCATIONS...SEATTLE...BREMERTON...TACOMA... PUYALLUP...OLYMPIA...FORKS...AND HOQUIAM. * ACCUMULATIONS...SNOW ACCUMULATIONS OF 1 OR 2 INCHES ARE LIKELY TONIGHT AS SNOW SHOWERS CONTINUE TO MOVE INTO WESTERN WASHINGTON. ANOTHER INCH OR TWO MAY FALL THURSDAY 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. && $$ WAZ518-519-241330- /O.CON.KSEW.WS.W.0003.000000T0000Z-110224T1400Z/ WEST SLOPES NORTHERN CASCADES AND PASSES- WEST SLOPES CENTRAL CASCADES AND PASSES- 743 PM PST WED FEB 23 2011 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 AM PST THURSDAY FOR THE CASCADES... A WINTER STORM WARNING FOR THE CASCADES REMAINS IN EFFECT UNTIL 6 AM PST THURSDAY. * SOME AFFECTED LOCATIONS...CONCRETE...DARRINGTON...SNOQUALMIE PASS...STEVENS PASS...WHITE PASS...PARADISE...AND PACKWOOD. * ACCUMULATIONS...8 TO 10 INCHES OF NEW SNOW ARE ARE EXPECTED TONIGHT IN THE CASCADES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNINGS MEANS SEVERE WINTER WEATHER IS OCCURRING OR IMMINENT. THOSE PLANNING TRAVEL IN THE WARNED AREA SHOULD BE PREPARED FOR HAZARDOUS...WINTER DRIVING CONDITIONS AND PLAN ACCORDINGLY. && $$ WAZ505-511-241330- /O.CON.KSEW.WS.W.0003.000000T0000Z-110224T1800Z/ EAST PUGET SOUND LOWLANDS-HOOD CANAL AREA- 743 PM PST WED FEB 23 2011 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 10 AM PST THURSDAY FOR THE EAST PUGET SOUND LOWLANDS AND THE HOOD CANAL AREA... A WINTER STORM WARNING FOR THE EAST PUGET SOUND LOWLANDS AND THE HOOD CANAL AREA REMAINS IN EFFECT UNTIL 10 AM PST THURSDAY. * SOME AFFECTED LOCATIONS...ISSAQUAH...NORTH BEND...AND SHELTON. * ACCUMULATIONS...SNOW ACCUMULATIONS OF 2 TO 4 INCHES ARE LIKELY TONIGHT. ANOTHER INCH OR TWO MAY FALL THURSDAY MORNING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNINGS 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. && $$ WAZ513-241330- /O.CON.KSEW.WS.W.0003.000000T0000Z-110224T1800Z/ OLYMPICS- 743 PM PST WED FEB 23 2011 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 10 AM PST THURSDAY FOR THE OLYMPICS... A WINTER STORM WARNING FOR THE OLYMPICS REMAINS IN EFFECT UNTIL 10 AM PST THURSDAY. * SOME AFFECTED LOCATIONS...HURRICANE RIDGE. * ACCUMULATIONS...6 TO 8 INCHES OF SNOW ARE EXPECTED TONIGHT ALONG THE NORTH SLOPES OF THE OLYMPIC MOUNTAINS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNINGS MEANS SEVERE WINTER WEATHER IS OCCURRING OR IMMINENT. THOSE PLANNING TRAVEL IN THE WARNED AREA SHOULD BE PREPARED FOR HAZARDOUS...WINTER DRIVING CONDITIONS AND PLAN ACCORDINGLY. && $$ WAZ514-515-241330- /O.CON.KSEW.WS.W.0003.000000T0000Z-110224T1800Z/ EASTERN STRAIT OF JUAN DE FUCA-WESTERN STRAIT OF JUAN DE FUCA- 743 PM PST WED FEB 23 2011 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 10 AM PST THURSDAY FOR THE STRAIT OF JUAN DE FUCA AREA... A WINTER STORM WARNING FOR THE STRAIT OF JUAN DE FUCA AREA REMAINS IN EFFECT UNTIL 10 AM PST THURSDAY. * SOME AFFECTED LOCATIONS...SEKIU...PORT ANGELES...AND SEQUIM. * ACCUMULATIONS...SNOW ACCUMULATIONS OF 2 TO 4 INCHES ARE EXPECTED TONIGHT WITH UP TO ANOTHER 2 INCHES THURSDAY MORNING. HEAVIEST AMOUNTS WILL BE AWAY FROM THE WATER. THE HEAVY SNOW WILL FALL IN HEAVY BURSTS THAT MAY RESULT IN SNOWFALL RATES OF 2 INCHES IN AN HOUR AT TIMES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNINGS 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. && $$ WAZ001-241330- /O.CON.KSEW.WS.W.0003.000000T0000Z-110224T1800Z/ SAN JUAN COUNTY- 743 PM PST WED FEB 23 2011 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 10 AM PST THURSDAY FOR SAN JUAN COUNTY... A WINTER STORM WARNING FOR SAN JUAN COUNTY REMAINS IN EFFECT UNTIL 10 AM PST THURSDAY. * SOME AFFECTED LOCATIONS...EASTSOUND AND FRIDAY HARBOR. * ACCUMULATIONS...SNOWFALL ACCUMULATIONS OF 2 TO 4 INCHES TONIGHT. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNINGS MEANS SEVERE WINTER WEATHER IS OCCURRING OR IMMINENT. THOSE PLANNING TRAVEL IN THE WARNED AREA SHOULD BE PREPARED FOR HAZARDOUS...WINTER DRIVING CONDITIONS AND PLAN ACCORDINGLY. && $$ WAZ506-507-510-241330- /O.CON.KSEW.WS.W.0003.000000T0000Z-110224T1800Z/ WESTERN SKAGIT COUNTY-EVERETT AND VICINITY-ADMIRALTY INLET AREA- 743 PM PST WED FEB 23 2011 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 10 AM PST THURSDAY FOR THE WESTERN SKAGIT COUNTY...EVERETT AND VICINITY...AND THE ADMIRALTY INLET AREA... A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 10 AM PST THURSDAY. * AFFECTED LOCATIONS...MOUNT VERNON...OAK HARBOR...PORT TOWNSEND...ARLINGTON...MARYSVILLE...EVERETT...AND EDMONDS. * SNOW ACCUMULATIONS OF 3 TO 5 INCHES ARE LIKELY TONIGHT WITH AN ADDITIONAL INCH OR TWO POSSIBLE THURSDAY MORNING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNINGS 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. && $$ WWW.WEATHER.GOV/SEATTLE
507 WWUS46 KSEW 241112 WSWSEW URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE SEATTLE WA 312 AM PST THU FEB 24 2011 .SNOW SHOWERS WILL CONTINUE THIS MORNING WITH THE SNOW LEVEL AT SEA LEVEL. LOCALIZED SNOW ACCUMULATION UP TO 2 INCHES IS EXPECTED. LOCALLY ICY ROADS ARE POSSIBLE THROUGH THE MORNING HOURS. WAZ518-519-242000- /O.CAN.KSEW.WS.W.0003.000000T0000Z-110224T1400Z/ /O.EXB.KSEW.WW.Y.0016.000000T0000Z-110224T2000Z/ WEST SLOPES NORTHERN CASCADES AND PASSES- WEST SLOPES CENTRAL CASCADES AND PASSES- 312 AM PST THU FEB 24 2011 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL NOON AND THE WINTER STORM WARNING HAS ENDED FOR THE WEST SLOPES OF THE NORTH AND CENTRAL CASCADES AND PASSES... THE NATIONAL WEATHER SERVICE IN SEATTLE HAS ISSUED A WINTER WEATHER ADVISORY FOR THE CASCADES. ADDITIONAL SNOWFALL TODAY UP TO 6 INCHES IS EXPECTED. THE WINTER STORM WARNING HAS ENDED. PRECAUTIONARY/PREPAREDNESS ACTIONS... THIS WINTER WEATHER ADVISORY MEANS THAT SNOW SHOWERS AND THE LOW SNOW LEVEL WILL CAUSE SOME TRAVEL DIFFICULTIES. MOTORISTS SHOULD BE PREPARED FOR WINTER DRIVING CONDITIONS AND USE CAUTION. && $$ WAZ001-505>507-510-511-513>515-242000- /O.CAN.KSEW.WS.W.0003.000000T0000Z-110224T1800Z/ /O.EXB.KSEW.WW.Y.0016.000000T0000Z-110224T2000Z/ SAN JUAN COUNTY-EAST PUGET SOUND LOWLANDS-WESTERN SKAGIT COUNTY- EVERETT AND VICINITY-ADMIRALTY INLET AREA-HOOD CANAL AREA- OLYMPICS-EASTERN STRAIT OF JUAN DE FUCA- WESTERN STRAIT OF JUAN DE FUCA- 312 AM PST THU FEB 24 2011 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL NOON AND THE WINTER STORM WARNING HAS ENDED... THE NATIONAL WEATHER SERVICE IN SEATTLE HAS ISSUED A WINTER WEATHER ADVISORY FOR SNOW SHOWERS AND A SNOW LEVEL NEAR SEA LEVEL. LOCAL ADDITIONAL SNOW ACCUMULATION UP TO 2 INCHES IS POSSIBLE THIS MORNING. EXPECT LOCALLY ICY ROADS THIS MORNING. THE WINTER STORM WARNING FOR HEAVY SNOW HAS ENDED. PRECAUTIONARY/PREPAREDNESS ACTIONS... THIS WINTER WEATHER ADVISORY MEANS THAT SNOW AND LOCALLY ICY ROADS WILL CAUSE SOME TRAVEL DIFFICULTIES. MOTORISTS SHOULD BE PREPARED FOR SLIPPERY ROADS AND USE CAUTION. && $$ WAZ504-508-509-512-516-517-242000- /O.EXT.KSEW.WW.Y.0016.000000T0000Z-110224T2000Z/ SOUTHWEST INTERIOR-SEATTLE/BREMERTON AREA-TACOMA AREA- LOWER CHEHALIS VALLEY AREA-NORTH COAST-CENTRAL COAST- 312 AM PST THU FEB 24 2011 THE NATIONAL WEATHER SERVICE IN SEATTLE HAS ISSUED A WINTER WEATHER ADVISORY FOR SNOW SHOWERS AND A SNOW LEVEL NEAR SEA LEVEL. LOCAL ADDITIONAL SNOW ACCUMULATION UP TO 2 INCHES IS POSSIBLE THIS MORNING. EXPECT LOCALLY ICY ROADS THIS MORNING. THE WINTER STORM WARNING FOR HEAVY SNOW HAS ENDED. PRECAUTIONARY/PREPAREDNESS ACTIONS... THIS WINTER WEATHER ADVISORY MEANS THAT SNOW AND LOCALLY ICY ROADS WILL CAUSE SOME TRAVEL DIFFICULTIES. MOTORISTS SHOULD BE PREPARED FOR SLIPPERY ROADS AND USE CAUTION. && $$ WWW.WEATHER.GOV/SEATTLE
What forecasters said that day
The local office's own words before this winter storm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Seattle, WA wrote its last area forecast discussion before this winter storm warning went out at Feb 21, 9:13 AM PST, 6 hours 1 minute earlier.
Area forecast discussion, Feb 21, 9:13 AM PST, 6 hours 1 minute before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SEATTLE WA
913 AM PST MON FEB 21 2011
.SYNOPSIS...AN UPPER LOW OFF THE NORTHERN CALIFORNIA COAST WILL
CONTINUE MOVING SOUTH TODAY. AN UPPER LEVEL TROUGH WILL DEVELOP OVER
THE AREA BEGINNING LATE THIS AFTERNOON AND CONTINUE THROUGH TUESDAY
BRINGING UNSETTLED AND SHOWERY WEATHER. A COLDER AIR MASS WILL MOVE
INTO THE REGION FROM THE NORTH ON WEDNESDAY AND THURSDAY...FOR THE
POSSIBILITY OF SOME LOWLAND SNOW. DRY AND COLD WEATHER COULD RETURN
ON FRIDAY.
&&
.SHORT TERM...MODELS TODAY ARE SHOWING RATHER GOOD CONSISTENCY AND
CONTINUITY...ESPECIALLY CONSIDERING THAT THE CURRENT UPPER LEVEL
CONFIGURATION IS A RIDGE AROUND 150W AND A MEAN TROUGH AROUND
115-120W. IT DOES LOOK INCREASINGLY LIKELY THAT A LATE SEASON ARCTIC
OUTBREAK WILL IMPACT AT LEAST THE NORTHERN HALF OF WESTERN
WASHINGTON BEGINNING LATER WED AND CONTINUING THROUGH EARLY IN THE
UPCOMING WEEKEND.
IN THE SHORT TERM...THE CUTOFF UPPER LOW THAT GAVE SOME SPOTTY LIGHT
SHOWERS TO THE COAST EARLY THIS MORNING IS NOW PULLING SOUTH THROUGH
THE NORTHERN CALIFORNIA OFFSHORE WATERS. A 160 KT NWLY JET STREAK AT
300 MB CENTERED JUST TO THE NW OF JUNEAU IS PLOWING SE. WHILE THIS
FEATURE WILL WEAKEN AS IT MOVES SE...IT WILL BRING QUICK CHANGES TO
THE WEATHER BEGINNING THIS AFTERNOON AS 500 MB HEIGHTS FALL AND
FRONTOGENESIS BEGINS FROM ABOUT THE NW INTERIOR OF WESTERN
WASHINGTON NORTHWESTWARD. THE MAIN IMPACTS OF THIS INCOMING NWLY
FLOW WILL BE TO DEEPEN THE TROUGH OVER THE PACIFIC NW...USHER IN
COOL MARITIME AIR...COOL CONDITIONS ALOFT...AND GIVE INCREASING
SHOWERS BEGINNING LATE THIS AFTERNOON. LATER TONIGHT THE MOUNTAINS
WILL LIKELY SEE INCREASING SNOWFALL...OF A FLUFFY 12 OR 15 TO 1
RATIO...THAT COULD RESULT IN UP TO 18 INCHES OF SNOW BETWEEN THIS
EVENING AND TUE EVENING. THIS WARRANTS THE ISSUANCE OF A WINTER
STORM WATCH LATER THIS MORNING FOR TONIGHT INTO TUE NIGHT FOR THE
CASCADES...THAT MAY NEED TO BE UPGRADED TO A WARNING LATER THIS
AFTERNOON. STRONGER NW WINDS WITH THE INCOMING TROUGH AND JET SHOULD
REMAIN OFF THE COAST...BUT THE RESULTANT W TO NW FLOW THROUGH THE
STRAIT WILL LIKELY RESULT IN THE QUICK FORMATION TONIGHT OF A
CONVERGENCE ZONE THAT HANGS UP SOMEWHERE FROM N KING COUNTY TO
SOMEWHERE OVER SNOHOMISH COUNTY.
WITH ALL THE ONSHORE FLOW...TEMPERATURES IN THE BOUNDARY LAYER WILL
BE MARGINAL FOR WET SNOW WITH THE CONVERGENCE ZONE. BUT THE UW WRF
MODELS DRIVEN BY THE GFS AND THE NAM...AS WELL AS THE OPERATIONAL
RUNS...ALL SHOW SOME POSSIBILITY OF SNOW OR MIXED RAIN AND SNOW WITH
THE CONVERGENCE ZONE VERY LATE TONIGHT AND TUE MORNING. CURRENT
FORECASTS ARE ALREADY WORDED THIS WAY...BUT INDICATE NO
ACCUMULATION. WILL REASSESS THE WORDING THIS AFTERNOON OVER THE
HIGHER TERRAIN OF SNOHOMISH COUNTY AND IN THE EAST PUGET SOUND
LOWLANDS.
THE POTENTIAL FOR BIGGER PROBLEMS BEGIN ON WED AS A 515-520 DAM 500
MB LOW DEVELOPS OVER VANCOUVER ISLAND AND SLIDES SLOWLY S ALONG THE
COAST BY THU MORNING. IN THE MEANTIME A 1050-1055 MB SURFACE HIGH
DEVELOPS OVER THE NORTH CENTRAL PORTION OF BC AND SLIDES S. THE PRES
GRADIENT BETWEEN THE ARCTIC HIGH AND THE LOW PRES DEVELOPING IN THE
COASTAL WATERS WILL SET UP IMPRESSIVE OUTFLOW OVER THE NORTH
INTERIOR STARTING WED AND CONTINUING THROUGH AT LEAST THU.
THE 12Z NAM...WRFGFS...00Z ECMWF AND 12Z GFS ALL HINT AT THE
DEVELOPMENT OF AN ARCTIC BOUNDARY THAT COULD RESULT IN LOCALLY HEAVY
SNOWFALL OVER THE N INTERIOR WED AND POSSIBLY INTO THE CENTRAL AND
SOUTH SOUND AREAS WED NIGHT OR THU. POSSIBLY DAMAGING WIND WITH THE
OUTFLOW OVER THE SAN JUANS AND WESTERN WHATCOM COUNTY CANNOT BE
RULED OUT...AND FREEZING SPRAY AND STORM FORCE CONDITIONS COULD
IMPACT THE WATERS. WILL TAKE A FINAL LOOK AT THE 12Z ECMWF ...BUT IT
IS LIKELY THAT SOME WATCHES WILL BE ISSUED FOR THE NORTH
INTERIOR AREAS THIS AFTERNOON FOR WED AND WED NIGHT. ALBRECHT
.LONG TERM...PREVIOUS LONG TERM DISCUSSION FOLLOWS...A MODIFIED
ARCTIC BOUNDARY IS EXPECTED TO PUSH SOUTHWARD ACROSS WESTERN
WASHINGTON WEDNESDAY NIGHT AND THURSDAY...AS FRASER RIVER OUTFLOW
INCREASES IN RESPONSE TO STRONG SURFACE RIDGING BUILDING SOUTHWARD
OVER INTERIOR BRITISH COLUMBIA. EXACTLY HOW MUCH MOISTURE WILL BE
AVAILABLE BY THIS POINT IN TIME OR HOW THIS SYSTEM WILL EVOLVE IS
STILL IN QUESTION. WITH THAT SAID...WEDNESDAY NIGHT OR EARLY
THURSDAY COULD BE THE BEST PERIOD FOR ACCUMULATING LOWLAND
SNOWFALL...BUT ITS STILL FAR TOO EARLY TO PUT ANY CONFIDENCE IN
DETAILS.
BY THURSDAY NIGHT AND FRIDAY...COLDER DRIER AIR WILL BE FILTERING
INTO THE AREA AS THE UPPER LEVEL TROUGH SHIFTS SOUTH OF THE REGION.
THE 00Z ECMWF STILL DIFFERS FROM THE GFS SOMEWHAT BY THE
WEEKEND...BUT IT IS NOT AS RADICALLY DIFFERENT AS IT WAS 24 HOURS
AGO. THE GFS/CANADIAN/ECMWF ARE IN GENERAL AGREEMENT FOR DRY AND
RATHER COLD WEATHER FRIDAY INTO THE FIRST PART OF WEEKEND.
TEMPERATURES WILL START TO MODERATE BY SUNDAY AS COLD NORTHERLY FLOW
GIVES WAY TO INCREASING ONSHORE FLOW. ANOTHER SYSTEM COULD SLIP DOWN
THE BRITISH COLUMBIA COAST TOWARD THE REGION BY LATE IN THE WEEKEND.
NO CHANGES MADE TO THE EXTENDED FORECAST OVERNIGHT. 27
&&
.HYDROLOGY...THERE IS NO INDICATION THAT A FLOOD PRODUCING PATTERN
WILL DEVELOP DURING THE NEXT TEN DAYS. LOW SNOW LEVELS WILL PRECLUDE
ANY THREAT OF FLOODING ON ANY AREA RIVERS...INCLUDING THE GREEN.
&&
.AVIATION...VFR CONDITIONS EXPECTED THIS MORNING AND AFTERNOON
ACROSS WESTERN WA. A BROAD UPPER LEVEL TROUGH OVER B.C. WILL DROP
SOUTH INTO W WA TONIGHT...AIDED BY A NWLY 120 KT JET. SHOWERS WILL
INCREASE ACROSS THE REGION THIS EVENING AS ONSHORE DEVELOPS. THE
CENTRAL PUGET SOUND AREA MAY STAY SHADOWED BY DOWNSLOPE FLOW OFF THE
OLYMPICS. SNOW SHOWERS ARE POSSIBLE OVERNIGHT...ESPECIALLY IN THE
CONVERGENCE ZONE. THE PATTERN REMAINS ACTIVE ON TUE AS STRONG
ONSHORE FLOW CONTINUES.
KSEA...LIGHT SOUTHEAST WIND THIS MORNING WILL BECOME SOUTHWESTERLY
THIS AFTERNOON AND INCREASE TO 10-15 KT. SHOWERS INCREASING
TONIGHT...MAINLY AFTER 03Z. 33
&&
.MARINE...GRADUALLY INCREASING SOUTHERLY GRADIENTS WILL PREVAIL
TODAY. A FRONTAL SYSTEM WILL MOVE INTO THE WATERS FROM THE NORTHWEST
TONIGHT AND TUESDAY. BRISK ONSHORE FLOW WILL FOLLOW THE SYSTEM WITH
SMALL CRAFT ADVISORY WINDS LIKELY OVER ALL WATERS.
OFFSHORE FLOW WILL DEVELOP BEHIND THE FRONT WEDNESDAY THROUGH
FRIDAY. THE FLOW COULD BE STRONG ENOUGH WED OR THU FOR GALE FORCE
WINDS OVER THE NORTHERN INLAND WATERS...THE WEST ENTRANCE...AND THE
NORTH COAST. 33
&&
.SEW WATCHES/WARNINGS/ADVISORIES...
WA...WINTER STORM WATCH LATER TONIGHT THROUGH TUESDAY NIGHT FOR THE
WEST SLOPES OF THE NORTH AND CENTRAL CASCADES AND PASSES.
PZ...SMALL CRAFT ADVISORY ALL WATERS.
WWW.WEATHER.GOV/SEATTLEThe office that day
Everything else NWS Seattle, WA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 21, 2:51 AM PST | Small Craft Advisory | SEW | 45 hr | |
| Feb 21, 9:53 AM PST | Winter Storm Watch | SEW | 5 hr | |
| Feb 21, 2:45 PM PST | Small Craft Advisory for Rough Bar | SEW | 3 days | |
| Feb 21, 3:14 PM PST | Winter Storm Watch | SEW | San Juan | 24 hr |
| Feb 21, 3:14 PM PST | Winter Weather Advisory | SEW | 24 hr |
Nearby
Winter Storm Warnings in Washington, 2011Every winter storm warning in 2011
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.