Alert archive / Washington / Winter Storm Warnings in 2011
Winter Storm Warning 12, NWS Seattle, WA
NWS Seattle, WA issued this winter storm warning at Nov 21, 2011, 10:13 AM PST. It took effect at Nov 21, 2011, 6:00 PM PST. It was in force for 33 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
- Nov 21, 2011, 10:13 AM PST (18:13 UTC)
- In effect from
- Nov 21, 2011, 6:00 PM PST
- Expired
- Nov 23, 2011, 3:18 AM PST
- In force
- 33 hr
- Issued by
- NWS Seattle, WA
The text
As transmitted, in the capitals the NWS used until 2016.
714 WWUS46 KSEW 211813 WSWSEW URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE SEATTLE WA 1013 AM PST MON NOV 21 2011 ...HEAVY SNOW WILL FALL IN THE NORTHERN CASCADES TONIGHT AND TUESDAY ABOVE 3500 FEET WITH ONE FOOT TO TWO AND A HALF FEET OF NEW SNOW LIKELY... .HEAVY SNOW WITH NEW ACCUMULATIONS OF ONE FOOT TO TWO AND A HALF FEET WILL FALL IN THE NORTHERN CASCADES TONIGHT AND TUESDAY AS A VIGOROUS FRONTAL SYSTEM MOVES THROUGH THE REGION. NEW SNOW AMOUNTS OF 8 TO 16 INCHES ARE EXPECTED IN THE CENTRAL WASHINGTON CASCADES TONIGHT AND TUESDAY...WITH UP TO 10 INCHES LIKELY IN THE OLYMPIC MOUNTAINS. IN ADDITION ANOTHER 2 TO 4 INCHES OF SNOW WILL FALL IN THE MOUNTAINS TODAY BEFORE SNOWFALL INCREASES TONIGHT. WAZ518-220200- /O.UPG.KSEW.WS.A.0012.111122T0200Z-111123T0800Z/ /O.NEW.KSEW.WS.W.0012.111122T0200Z-111123T0200Z/ /O.CON.KSEW.WW.Y.0037.000000T0000Z-111122T0000Z/ WEST SLOPES NORTHERN CASCADES AND PASSES- 1013 AM PST MON NOV 21 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 PM PST THIS AFTERNOON... ...WINTER STORM WARNING IN EFFECT FROM 6 PM THIS EVENING TO 6 PM PST TUESDAY... THE NATIONAL WEATHER SERVICE IN SEATTLE HAS ISSUED A WINTER STORM WARNING FOR HEAVY SNOW...WHICH IS IN EFFECT FROM 6 PM THIS EVENING TO 6 PM PST TUESDAY. THE WINTER STORM WATCH IS NO LONGER IN EFFECT. * AFFECTED LOCATIONS...NORTHERN CASCADES ABOVE 3500 FEET. * ACCUMULATIONS...UP TO 4 INCHES OF NEW SNOW TODAY...THEN ONE FOOT TO TWO AND A HALF FEET OF ADDITIONAL SNOW TONIGHT THROUGH TUESDAY EVENING. * SNOW LEVEL...2000 FEET TODAY...3500 FEET TONIGHT AND TUESDAY. * TIMING...HEAVY SNOW IS LIKELY TONIGHT THROUGH TUESDAY EVENING WITH THE PERIOD OF MOST SIGNIFICANT ACCUMULATION OCCURRING MIDNIGHT TONIGHT THROUGH NOON TUESDAY. * IMPACTS...EXPECT DANGEROUS WINTER DRIVING CONDITIONS...WITH LONG DELAYS OR ROAD CLOSURES POSSIBLE. 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. 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. && $$ WAZ513-519-220000- /O.CON.KSEW.WW.Y.0037.000000T0000Z-111122T0000Z/ OLYMPICS-WEST SLOPES CENTRAL CASCADES AND PASSES- 1013 AM PST MON NOV 21 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 PM PST THIS AFTERNOON... * AFFECTED LOCATIONS...OLYMPICS AND CENTRAL WASHINGTON CASCADES. * ACCUMULATIONS...3 TO 6 INCHES OF NEW SNOW TODAY. * SNOW LEVEL...2500 FEET. * TIMING...6 AM TO 4 PM TODAY. * IMPACTS...EXPECT WINTER DRIVING CONDITIONS WITH POSSIBLE DELAYS IN THE PASSES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...SLEET...OR FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ MCDONNAL
8 follow-up statements
900 WWUS46 KSEW 212332 WSWSEW URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE SEATTLE WA 332 PM PST MON NOV 21 2011 ...HEAVY SNOW WILL FALL IN THE NORTHERN CASCADES TONIGHT AND TUESDAY ABOVE 3500 FEET WITH ONE FOOT TO TWO AND A HALF FEET OF NEW SNOW LIKELY... .HEAVY SNOW WITH NEW ACCUMULATIONS OF ONE FOOT TO TWO AND A HALF FEET WILL FALL IN THE NORTHERN CASCADES TONIGHT AND TUESDAY AS A VIGOROUS FRONTAL SYSTEM MOVES THROUGH THE REGION. NEW SNOW AMOUNTS OF 8 TO 16 INCHES ARE EXPECTED IN THE CENTRAL WASHINGTON CASCADES TONIGHT AND TUESDAY...WITH UP TO 10 INCHES LIKELY IN THE OLYMPIC MOUNTAINS. IN ADDITION ANOTHER 2 TO 4 INCHES OF SNOW WILL FALL IN THE MOUNTAINS TODAY BEFORE SNOWFALL INCREASES TONIGHT. WAZ518-220745- /O.EXT.KSEW.WW.Y.0037.000000T0000Z-111122T0200Z/ /O.CON.KSEW.WS.W.0012.111122T0200Z-111123T0200Z/ WEST SLOPES NORTHERN CASCADES AND PASSES- 332 PM PST MON NOV 21 2011 ...WINTER WEATHER ADVISORY IN EFFECT ABOVE 2500 FEET UNTIL 6 PM PST THIS EVENING... ...WINTER STORM WARNING REMAINS IN EFFECT ABOVE 3500 FEET 6 PM PST THIS EVENING UNTIL 6 PM PST TUESDAY... * AFFECTED LOCATIONS...NORTHERN CASCADES ABOVE 3500 FEET. * ACCUMULATIONS...ONE TO TWO FEET OF ADDITIONAL SNOW TONIGHT THROUGH TUESDAY EVENING. * SNOW LEVEL...2000 FEET LATE THIS AFTERNOON TODAY...RISING TO 3500 FEET LATER TONIGHT AND TUESDAY. * TIMING...HEAVY SNOW IS LIKELY TONIGHT THROUGH TUESDAY EVENING WITH THE PERIOD OF MOST SIGNIFICANT ACCUMULATION OCCURRING MIDNIGHT TONIGHT THROUGH NOON TUESDAY. * IMPACTS...EXPECT DANGEROUS WINTER DRIVING CONDITIONS...WITH LONG DELAYS OR ROAD CLOSURES POSSIBLE. 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. 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. && $$ WAZ513-519-220745- /O.EXT.KSEW.WW.Y.0037.000000T0000Z-111122T1400Z/ OLYMPICS-WEST SLOPES CENTRAL CASCADES AND PASSES- 332 PM PST MON NOV 21 2011 ...WINTER WEATHER ADVISORY NOW IN EFFECT ABOVE 4000 FEET UNTIL 6 AM PST TUESDAY... * AFFECTED LOCATIONS...OLYMPICS AND CENTRAL WASHINGTON CASCADES. * ACCUMULATIONS...5 TO 10 INCHES OF NEW SNOW OVERNIGHT. * SNOW LEVEL...2500 FEET LATE THIS AFTERNOON RISING TO 4500 TO 5500 FEET BY TUESDAY MORNING. * TIMING...THIS EVENING THROUGH TONIGHT. * IMPACTS...EXPECT WINTER DRIVING CONDITIONS WITH POSSIBLE DELAYS IN THE PASSES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...SLEET...OR FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$
957 WWUS46 KSEW 220635 WSWSEW URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE SEATTLE WA 1035 PM PST MON NOV 21 2011 ...HEAVY SNOW WILL FALL IN THE NORTHERN CASCADES TONIGHT AND TUESDAY ABOVE 3500 FEET WITH ONE FOOT TO TWO AND A HALF FEET OF NEW SNOW LIKELY... .HEAVY SNOW WITH NEW ACCUMULATIONS OF ONE FOOT TO TWO AND A HALF FEET WILL FALL IN THE NORTHERN CASCADES TONIGHT AND TUESDAY AS A VIGOROUS FRONTAL SYSTEM MOVES THROUGH THE REGION. NEW SNOW AMOUNTS OF 6 TO 15 INCHES ARE EXPECTED IN THE CENTRAL WASHINGTON CASCADES TONIGHT AND TUESDAY...WITH UP TO 10 INCHES LIKELY IN THE OLYMPIC MOUNTAINS. WAZ518-221445- /O.CON.KSEW.WS.W.0012.000000T0000Z-111123T0200Z/ WEST SLOPES NORTHERN CASCADES AND PASSES- 1035 PM PST MON NOV 21 2011 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 PM PST TUESDAY... * AFFECTED LOCATIONS...NORTHERN CASCADES ABOVE 3500 FEET. * ACCUMULATIONS...ONE TO TWO FEET OF ADDITIONAL SNOW TONIGHT THROUGH TUESDAY EVENING. * SNOW LEVEL...3000 FEET...RISING TO NEAR 4000 FEET LATE TONIGHT AND TUESDAY. * TIMING...HEAVY SNOW IS LIKELY TONIGHT THROUGH TUESDAY EVENING WITH THE PERIOD OF MOST SIGNIFICANT ACCUMULATION OCCURRING MIDNIGHT TONIGHT THROUGH NOON TUESDAY. * IMPACTS...EXPECT DANGEROUS WINTER DRIVING CONDITIONS...WITH LONG DELAYS OR ROAD CLOSURES POSSIBLE. 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. && $$ WAZ513-519-221400- /O.CON.KSEW.WW.Y.0037.000000T0000Z-111122T1400Z/ OLYMPICS-WEST SLOPES CENTRAL CASCADES AND PASSES- 1035 PM PST MON NOV 21 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 AM PST TUESDAY... * AFFECTED LOCATIONS...OLYMPICS AND CENTRAL WASHINGTON CASCADES. * ACCUMULATIONS...5 TO 10 INCHES OF NEW SNOW OVERNIGHT. * SNOW LEVEL...3000 FEET TONIGHT RISING TO 4500 TO 5500 FEET BY TUESDAY MORNING. * TIMING...THIS EVENING THROUGH TONIGHT. * IMPACTS...EXPECT WINTER DRIVING CONDITIONS WITH POSSIBLE DELAYS IN THE PASSES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...SLEET...OR FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$
029 WWUS46 KSEW 221126 WSWSEW URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE SEATTLE WA 326 AM PST TUE NOV 22 2011 ...HEAVY SNOW WILL FALL IN THE NORTHERN CASCADES TONIGHT AND TUESDAY ABOVE 3500 FEET WITH ONE FOOT TO TWO AND A HALF FEET OF NEW SNOW LIKELY... .HEAVY SNOW WITH NEW ACCUMULATIONS OF ONE FOOT TO TWO AND A HALF FEET WILL FALL IN THE NORTHERN CASCADES TONIGHT AND TUESDAY AS A VIGOROUS FRONTAL SYSTEM MOVES THROUGH THE REGION. NEW SNOW AMOUNTS OF 6 TO 15 INCHES ARE EXPECTED IN THE CENTRAL WASHINGTON CASCADES TONIGHT AND TUESDAY...WITH UP TO 10 INCHES LIKELY IN THE OLYMPIC MOUNTAINS. WAZ518-221930- /O.CON.KSEW.WS.W.0012.000000T0000Z-111123T0200Z/ WEST SLOPES NORTHERN CASCADES AND PASSES- 326 AM PST TUE NOV 22 2011 ...WINTER STORM WARNING REMAINS IN EFFECT ABOVE 3500 FEET UNTIL 6 PM PST THIS EVENING... * AFFECTED LOCATIONS...NORTHERN CASCADES ABOVE 3500 FEET. * ACCUMULATIONS...UP TO ONE FOOT OF ADDITIONAL SNOW TODAY. * SNOW LEVEL...3500 FEET...RISING TO NEAR 4000 FEET TODAY. * TIMING...HEAVY SNOW WILL GRADUALLY TAPER TODAY. * IMPACTS...EXPECT DANGEROUS WINTER DRIVING CONDITIONS...WITH DELAYS OR ROAD CLOSURES POSSIBLE. 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. && $$ WAZ513-519-221930- /O.EXT.KSEW.WW.Y.0037.000000T0000Z-111122T2000Z/ OLYMPICS-WEST SLOPES CENTRAL CASCADES AND PASSES- 326 AM PST TUE NOV 22 2011 ...WINTER WEATHER ADVISORY ABOVE 3000 FEET NOW IN EFFECT UNTIL NOON PST TODAY... * AFFECTED LOCATIONS...OLYMPICS AND CENTRAL WASHINGTON CASCADES. * ACCUMULATIONS...5 TO 10 INCHES OF NEW SNOW THIS MORNING. * SNOW LEVEL...3000 FEET TONIGHT RISING TO 4500 OR 5000 FEET BY NOON. * IMPACTS...EXPECT WINTER DRIVING CONDITIONS WITH POSSIBLE DELAYS IN THE PASSES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...SLEET...OR FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$
883 WWUS46 KSEW 221211 CCA WSWSEW URGENT - WINTER WEATHER MESSAGE...CORRECTED NATIONAL WEATHER SERVICE SEATTLE WA 405 AM PST TUE NOV 22 2011 ...HEAVY SNOW WILL FALL IN THE NORTHERN CASCADES TODAY ABOVE 3500 FEET WITH UP TO ONE FOOT OF NEW SNOW... .A STRONG FRONTAL SYSTEM WILL BRING STRONG WINDS AND HEAVY SNOW TO THE NORTHERN CASCADES TODAY. LESSER AMOUNTS ARE EXPECTED IN THE OLYMPICS AND CENTRAL CASCADES WHERE SNOW LEVELS WILL BE RISING ABOVE PASS LEVELS BY NOON TODAY. WAZ518-222030- /O.CON.KSEW.WS.W.0012.000000T0000Z-111123T0200Z/ WEST SLOPES NORTHERN CASCADES AND PASSES- 405 AM PST TUE NOV 22 2011 ...WINTER STORM WARNING REMAINS IN EFFECT ABOVE 3500 FEET UNTIL 6 PM PST THIS EVENING... * AFFECTED LOCATIONS...NORTHERN CASCADES ABOVE 3500 FEET. * ACCUMULATIONS...UP TO ONE FOOT OF ADDITIONAL SNOW TODAY. * SNOW LEVEL...3500 FEET...RISING TO NEAR 4000 FEET TODAY. * TIMING...HEAVY SNOW WILL GRADUALLY TAPER TODAY. * IMPACTS...EXPECT DANGEROUS WINTER DRIVING CONDITIONS...WITH DELAYS OR ROAD CLOSURES POSSIBLE. 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. && $$ WAZ513-519-222000- /O.COR.KSEW.WW.Y.0037.000000T0000Z-111122T2000Z/ OLYMPICS-WEST SLOPES CENTRAL CASCADES AND PASSES- 405 AM PST TUE NOV 22 2011 ...WINTER WEATHER ADVISORY ABOVE 3000 FEET NOW IN EFFECT UNTIL NOON PST TODAY... * AFFECTED LOCATIONS...OLYMPICS AND CENTRAL CASCADES. * ACCUMULATIONS...5 TO 10 INCHES OF NEW SNOW THIS MORNING. * SNOW LEVEL...3000 FEET TONIGHT RISING TO 4500 OR 5000 FEET BY NOON. * IMPACTS...EXPECT WINTER DRIVING CONDITIONS WITH POSSIBLE DELAYS IN THE PASSES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...SLEET...OR FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$
461
WWUS46 KSEW 221725
WSWSEW
URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE SEATTLE WA
925 AM PST TUE NOV 22 2011
...SNOW OR A WINTRY MIX OF PRECIPITATION WILL CONTINUE TO FALL
ACROSS THE MOUNTAINS AND CASCADE PASSES OF WESTERN WASHINGTON
THROUGH TONIGHT WITH VARYING SNOW LEVELS ACROSS THE AREA...
.A STRONG FRONTAL SYSTEM WILL BRING MORE HEAVY SNOW TO THE NORTH
CASCADES THROUGH WEDNESDAY MORNING. LESSER AMOUNTS ARE EXPECTED
IN THE OLYMPICS AND CENTRAL CASCADES WHERE SNOW LEVELS WILL BE
RISING TO ABOVE 5000 FEET THIS AFTERNOON. HOWEVER...COLD AIR
TRAPPED IN THE PASSES MAY STILL PRODUCE A WINTRY MIX OF
PRECIPITATION.
WAZ518-230430-
/O.EXT.KSEW.WS.W.0012.000000T0000Z-111123T1800Z/
WEST SLOPES NORTHERN CASCADES AND PASSES-
925 AM PST TUE NOV 22 2011
...WINTER STORM WARNING NOW IN EFFECT UNTIL 10 AM PST WEDNESDAY...
* AFFECTED LOCATIONS...NORTHERN CASCADES ABOVE 4000 FEET.
* ACCUMULATIONS...ANOTHER 1 TO 2 FEET OF SNOW IS EXPECTED ACROSS THE
NORTH WASHINGTON CASCADES THROUGH MIDDAY WEDNESDAY.
* SNOW LEVEL...3500 TO 4000 FEET THROUGH WEDNESDAY MORNING.
* TIMING...HEAVY SNOW AT TIMES THROUGH WEDNESDAY MORNING.
* IMPACTS...EXPECT DANGEROUS WINTER DRIVING CONDITIONS...WITH
DELAYS OR ROAD CLOSURES POSSIBLE.
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.
&&
$$
WAZ513-519-230200-
/O.EXT.KSEW.WW.Y.0037.000000T0000Z-111123T0200Z/
OLYMPICS-WEST SLOPES CENTRAL CASCADES AND PASSES-
925 AM PST TUE NOV 22 2011
...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 6 PM PST THIS
EVENING...
* AFFECTED LOCATIONS...OLYMPICS AND CENTRAL CASCADES.
* ACCUMULATIONS...5 TO 10 INCHES OF NEW SNOW EXPECTED ABOVE 5000
FEET THROUGH LATE THIS AFTERNOON. A WINTRY MIX OF
SNOW...SLEET...FREEZING RAIN...OR JUST RAIN IN THE PASSES THROUGH
LATE TODAY. ACCUMULATIONS IN THE PASSES BELOW 5000 FEET WILL
VARY CONSIDERABLY BUT UP TO 6 INCHES OF SNOW WITH MINOR ICE
ACCUMULATION IS POSSIBLE BY LATE TODAY.
* SNOW LEVEL...RISING TO 5000 TO 6000 FEET THIS AFTERNOON AND
EVENING. COLD AIR WILL REMAIN TRAPPED IN THE CENTRAL CASCADE
PASSES WHERE A WINTRY MIX WILL CONTINUE THROUGH LATE TODAY.
* IMPACTS...EXPECT WINTER DRIVING CONDITIONS WITH POSSIBLE
DELAYS IN THE PASSES.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...SLEET...OR
FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR
SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE
DRIVING.
&&
$$
MERCER
WEATHER.GOV/SEATTLE516 WWUS46 KSEW 230154 WSWSEW URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE SEATTLE WA 554 PM PST TUE NOV 22 2011 ...SNOW WILL CONTINUE ACROSS NORTHERN AREAS OF THE CASCADES WHILE THE SNOW CHANGES TO RAIN OVER CENTRAL AND SOUTHERN CASCADES... .A STRONG WARM FRONT DRAPED SOUTHWEST TO NORTHEAST ACROSS THE CENTER OF WESTERN WASHINGTON WILL CONTINUE TO SLOWLY MOVE NORTH UP THE CASCADES. PERIODS OF HEAVY SNOW WILL CONTINUE NORTH OF THE FRONT WHILE RAIN WILL CONTINUE TO THE SOUTH. SNOW LEVELS HAVE RISEN TO AROUND 5500 FEET FROM AROUND MT RAINIER SOUTH AT 530 PM THIS EVENING AND THE SNOW LEVELS ACROSS THE CENTRAL CASCADES...WHERE SNOQUALMIE AND STEVENS PASS ARE...WILL CONTINUE TO RISE...MOVING ABOVE PASS LEVEL A LITTLE LATER THIS EVENING FOR RAIN OR A MIX OR RAIN AND SNOW. WAZ518-231000- /O.CON.KSEW.WS.W.0012.000000T0000Z-111123T1800Z/ WEST SLOPES NORTHERN CASCADES AND PASSES- 554 PM PST TUE NOV 22 2011 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 10 AM PST WEDNESDAY... * AFFECTED LOCATIONS...NORTHERN CASCADES ABOVE 4000 FEET. * ACCUMULATIONS...ANOTHER 1 TO 2 FEET OF SNOW IS EXPECTED ACROSS THE NORTH WASHINGTON CASCADES THROUGH MIDDAY WEDNESDAY. * SNOW LEVEL...3500 TO 4000 FEET THROUGH WEDNESDAY MORNING. * TIMING...HEAVY SNOW AT TIMES THROUGH WEDNESDAY MORNING. * IMPACTS...EXPECT DANGEROUS WINTER DRIVING CONDITIONS...WITH DELAYS OR ROAD CLOSURES POSSIBLE. 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. && $$ WAZ513-519-230600- /O.EXT.KSEW.WW.Y.0037.000000T0000Z-111123T0600Z/ OLYMPICS-WEST SLOPES CENTRAL CASCADES AND PASSES- 554 PM PST TUE NOV 22 2011 ...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 10 PM PST THIS EVENING... * AFFECTED LOCATIONS...OLYMPICS AND CENTRAL CASCADES. * ACCUMULATIONS...2 TO 4 INCHES AT PASS LEVEL IN THE CASCADES THIS EVENING...MAINLY STEVENS PASS...AND 5 TO 10 INCHES ABOVE 5000 FEET OVERNIGHT. AT SNOQUALMIE PASS...THE SNOW WILL CONTINUE THROUGH AROUND 8 PM AFTER WHICH IT IS EXPECTED TO CHANGE TO RAIN. FOR STEVENS PASS...THE SNOW WILL HOLD ON A LITTLE LONGER BEFORE THE FRONT MOVES NORTH OF THE AREA...WITH SNOW EXPECTED TO CONTINUE THROUGH 10 PM BEFORE CHANGING TO RAIN. * SNOW LEVEL...RISING TO 5000 TO 6000 FEET AT SNOQUALMIE PASS BY 9 PM AND TO AROUND 5000 FEET AT STEVENS BY 11 PM. * IMPACTS...EXPECT WINTER DRIVING CONDITIONS WITH POSSIBLE DELAYS IN THE PASSES WELL INTO THE EVENING HOURS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...SLEET...OR FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ CERNIGLIA
381 WWUS46 KSEW 230551 WSWSEW URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE SEATTLE WA 951 PM PST TUE NOV 22 2011 ...SNOW WILL CONTINUE ACROSS NORTHERN AREAS OF THE CASCADES WHILE THE SNOW CHANGES TO RAIN OVER CENTRAL AND SOUTHERN CASCADES... .A STRONG WARM FRONT DRAPED SOUTHWEST TO NORTHEAST ACROSS WESTERN WASHINGTON WILL CONTINUE TO SPREAD WARM AIR ACROSS THE CENTRAL AND SOUTHERN CASCADES AND THE OLYMPICS TONIGHT. SNOW LEVELS WILL CONTINUE TO RISE OVER THE CASCADES PEAKING OUT NEAR 5000 FEET LATER TONIGHT. THE COLD FRONT WILL PASS EAST ACROSS THE MOUNTAINS AFTER DAYBREAK WEDNESDAY WITH LOWERING SNOW LEVELS AND DIMINISHING PRECIPITATION. WAZ513-519-230700- /O.EXP.KSEW.WW.Y.0037.000000T0000Z-111123T0600Z/ OLYMPICS-WEST SLOPES CENTRAL CASCADES AND PASSES- 951 PM PST TUE NOV 22 2011 ...WINTER WEATHER ADVISORY WILL EXPIRE AT 10 PM PST THIS EVENING... SNOW LEVELS CONTINUE TO RISE LATE THIS EVENING AND THE PRECIPITATION HAS CHANGED TO A MIX OF RAIN AND SNOW AT HURRICANE RIDGE...STEVENS PASS AND SNOQUALMIE PASS. WARM AIR WILL CONTINUE TO FLOOD ACROSS THE PASSES AND THE OLYMPICS TONIGHT WITH SNOW LEVELS TOPPING OUT AROUND 6000 FEET ON THE OLYMPICS AND 5000 FEET ACROSS THE CENTRAL CASCADES. SNOW ACCUMULATIONS WILL BE VERY LIMITED FOR THE REMINDER OF THE NIGHT. A COLD FRONT WILL SWEEP ACROSS THE REGION AROUND DAWN WEDNESDAY USHERING IN COLDER AIR AND LOWER SNOW LEVELS...HOWEVER THE PRECIPITATION WILL BE TAPERING OFF DURING THIS TIME. $$ WAZ518-231400- /O.CON.KSEW.WS.W.0012.000000T0000Z-111123T1800Z/ WEST SLOPES NORTHERN CASCADES AND PASSES- 951 PM PST TUE NOV 22 2011 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 10 AM PST WEDNESDAY... * AFFECTED LOCATIONS...NORTHERN CASCADES ABOVE 4000 FEET. * ACCUMULATIONS...ANOTHER 1 TO 1.5 FEET OF SNOW IS EXPECTED ACROSS THE NORTH WASHINGTON CASCADES THROUGH MIDDAY WEDNESDAY. * SNOW LEVEL...NEAR 4000 FEET THROUGH WEDNESDAY MORNING. * TIMING...HEAVY SNOW AT TIMES THROUGH WEDNESDAY MORNING. * IMPACTS...EXPECT DANGEROUS WINTER DRIVING CONDITIONS...WITH DELAYS OR ROAD CLOSURES POSSIBLE. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING MEANS SEVERE WINTER WEATHER IS OCCURRING OR IMMINENT. THOSE PLANNING TRAVEL IN THE WARNED AREA SHOULD BE PREPARED FOR HAZARDOUS WINTER DRIVING CONDITIONS AND PLAN ACCORDINGLY. && $$
230 WWUS46 KSEW 231118 WSWSEW URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE SEATTLE WA 318 AM PST WED NOV 23 2011 ...HEAVY SNOW POSSIBLE OVER THE CASCADES AGAIN THANKSGIVING DAY AND NIGHT... .A STRONG FRONT WILL BRING SNOW AND WIND TO THE CASCADES THANKSGIVING DAY AND NIGHT. WAZ518-240000- /O.CAN.KSEW.WS.W.0012.000000T0000Z-111123T1800Z/ /O.NEW.KSEW.WS.A.0013.111124T1800Z-111125T1400Z/ WEST SLOPES NORTHERN CASCADES AND PASSES- 318 AM PST WED NOV 23 2011 ...WINTER STORM WATCH IN EFFECT ABOVE 2000 FEET FROM THURSDAY MORNING THROUGH LATE THURSDAY NIGHT... ...WINTER STORM WARNING IS CANCELLED... THE NATIONAL WEATHER SERVICE IN SEATTLE HAS ISSUED A WINTER STORM WATCH...WHICH IS IN EFFECT FROM THURSDAY MORNING THROUGH LATE THURSDAY NIGHT. THE WINTER STORM WARNING HAS BEEN CANCELLED. * AFFECTED LOCATIONS...NORTHERN CASCADES. * ACCUMULATIONS...10 TO 14 INCHES ARE POSSIBLE. * SNOW LEVEL...1500 TO 2000 FEET. * TIMING...SNOW WILL DEVELOP DURING THE MORNING ON THANKSGIVING DAY AND INCREASE IN THE AFTERNOON AND EVENING. * IMPACTS...WINTER DRIVING CONDITIONS ARE LIKELY. ROAD DELAYS OR CLOSURES ARE POSSIBLE. 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. && $$ WAZ519-240000- /O.NEW.KSEW.WS.A.0013.111124T1800Z-111125T1400Z/ WEST SLOPES CENTRAL CASCADES AND PASSES- 318 AM PST WED NOV 23 2011 ...WINTER STORM WATCH IN EFFECT ABOVE 2000 FEET FROM THURSDAY MORNING THROUGH LATE THURSDAY NIGHT... THE NATIONAL WEATHER SERVICE IN SEATTLE HAS ISSUED A WINTER STORM WATCH...WHICH IS IN EFFECT FROM THURSDAY MORNING THROUGH LATE THURSDAY NIGHT. * AFFECTED LOCATIONS...CENTRAL CASCADES. * ACCUMULATIONS...8 TO 12 INCHES ARE POSSIBLE. * SNOW LEVEL...AROUND 2000 FEET. * TIMING...SNOW WILL DEVELOP DURING THE MORNING ON THANKSGIVING DAY AND INCREASE IN THE AFTERNOON AND EVENING. * IMPACTS...WINTER DRIVING CONDITIONS ARE LIKELY. ROAD DELAYS OR CLOSURES ARE POSSIBLE. TRAVEL THROUGH THE PASSES MAY BECOME DIFFICULT. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WATCH MEANS CONDITIONS ARE FAVORABLE FOR SEVERE WINTER WEATHER. IF YOU MUST TRAVEL IN THE WATCH AREA...CARRY AN EXTRA FLASHLIGHT...FOOD...WATER...AND BLANKETS IN CASE OF EMERGENCY. && $$
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 Nov 21, 10:05 AM PST, 8 minutes earlier.
Area forecast discussion, Nov 21, 10:05 AM PST, 8 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SEATTLE WA
1005 AM PST MON NOV 21 2011
.SYNOPSIS...SHOWERY AND BREEZY CONDITIONS WILL PERSIST TODAY BEHIND
A FRONT THAT PASSED THROUGH WESTERN WASHINGTON EARLY THIS MORNING. A
STRONGER FRONTAL SYSTEM WILL STALL OVER THE AREA TONIGHT THROUGH
TUESDAY NIGHT OR WEDNESDAY MORNING. THIS SYSTEM WILL BRING HEAVIER
RAINS AND DAMAGING WINDS OVER THE COAST AND NORTH INTERIOR.
ADDITIONAL FRONTS WILL BRING RAIN AGAIN LATE THANKSGIVING DAY...AND
AGAIN OVER THE WEEKEND.
&&
.SHORT TERM...SHOWERY AND BREEZY CONDITIONS THIS MORNING BEHIND THE
FRONT...HAVE HAD A FEW ISOLATED LIGHTNING STRIKES OVER THE COASTAL
WATERS AND JUST NORTH OF KHQM ON THE CENTRAL WASHINGTON COAST.
EXPECT TEMPERATURES TO CONTINUE TO WARM WITH THE WARM ADVECTION
AHEAD OF THE NEXT SYSTEM WITH SOME DRY SPELLS THIS AFTERNOON. WINDS
ALONG THE CENTRAL AND NORTH WASHINGTON COAST HAVE COME DOWN...HAVE
LET THE WIND ADVISORY EXPIRE ACCORDINGLY THIS MORNING WHILE THE
ADVISORY FOR THE NORTHWEST INTERIOR WILL REMAIN IN EFFECT FOR THE
MORNING HOURS. EXPECT THE WINDS TO TAPER OFF QUICKLY THROUGH THE
AFTERNOON HOURS FOR THE REST OF THE INTERIOR.
RAIN AND WINDS WILL PICK UP AGAIN TONIGHT INTO TUESDAY MORNING AS A
STRONGER AND WETTER FRONT APPROACHES THE COAST. SATELLITE TOTAL
PRECIPITABLE WATER IMAGERY CONTINUES TO SHOW CORE VALUES OF 1.5 TO 2
INCHES NEAR THE DATELINE AND VALUES NEAR 1.0 INCH EXTENDING EAST OF
130 W. MODEL 850 MB WINDS REMAIN VERY STRONG FOR THIS SYSTEM...IN
IN THE 70-80 KNOT RANGE IN THE VICINITY OF THE OLYMPICS TONIGHT AND
TUESDAY MORNING. ACCORDINGLY SURFACE GRADIENTS AND WINDS STRENGTHEN
AGAIN WITH THE FRONT LATER TONIGHT INTO TUESDAY MORNING. STRONG
WINDS JUST ABOVE THE SURFACE WILL HELP BRING HIGH WINDS TO THE
COAST...OLYMPICS...AND NORTHWEST INTERIOR AND ADMIRALTY INLET. HAVE
ISSUED A HIGH WIND WARNING FOR THESE AREAS FOR TONIGHT THROUGH
MIDDAY TOMORROW. EXPECT ADVISORY LEVEL WINDS ALL OTHER AREAS EXCEPT
THE CASCADE MOUNTAINS.
MORNING MODEL RUNS CONTINUE TO SHOW THE FRONT MOVING ONSHORE
TUESDAY THEN SINKING SOUTH INTO SOUTHWEST WASHINGTON/NORTHERN OREGON
TUESDAY NIGHT INTO WEDNESDAY. THE AIR MASS OVER THE NORTH CASCADES
DOES NOT WARM UP MUCH AS THE SYSTEM MOVES SOUTH...SO MUCH SO THAT
SNOW LEVELS RISE ONLY TO ABOUT 3500 FEET IN THE NORTH BRINGING A
THREAT OF SIGNIFICANT SNOW AMOUNTS TO NORTH CASCADES... AS MUCH ONE
TO TWO FEET OF NEW SNOW THROUGH TUESDAY EVENING. HAVE ACCORDINGLY
UPGRADED THE WINTER STORM WATCH TO A WINTER STORM WARNING FOR THE
NORTH CASCADES. THE FASTER MOVEMENT OF THE FRONT AND THE LOWER SNOW
LEVELS REDUCES THE THREAT OF FLOODING FOR RIVERS FLOWING OUT OF THE
NORTH CASCADES. CONVERSELY THE POTENTIAL FOR THE FRONT HANGING UP
OVER THE SOUTHERN PORTION OF THE CWA RAISES THE POSSIBILITY FOR SOME
FLOODING ON SOME OF THE RIVERS IN SOUTHWESTERN WASHINGTON. SEE HYDRO
DISCUSSION FOR MORE DETAILS.
FOR WEDNESDAY...RAIN WILL CHANGE TO SHOWERS AS THE FRONT SHIFTS
SOUTH FROM THE NORTHERN PORTIONS DURING THE DAY. A SHORT LIVED
SURFACE RIDGE WILL BUILD OVER WESTERN WASHINGTON LATE IN THE DAY
BRINGING A BREAK IN THE ACTION.
.LONG TERM...FROM PREVIOUS DISCUSSION...EXTENDED MODELS SHOWING GOOD
CONSISTENCY WITH TIMING EARLY ON IN THE EXTENDED WITH ANOTHER FRONT
MOVING THROUGH WESTERN WASHINGTON LATE ON THANKSGIVING. WHILE THE
SURFACE LOW WITH THIS FRONT IS MUCH WEAKER THAN THE SYSTEMS COMING
UP THE PARENT LOW IS PROGGED TO MOVE THROUGH THE SOUTH END OF
VANCOUVER ISLAND ON THE 00Z GFS. THIS BRINGS UP THE POSSIBILITY OF
ANOTHER ROUND OF WINDS FOR THE AREA. MODEL SOLUTIONS START TO
DIVERGE FRIDAY NIGHT WITH THE GFS BRINGING A WARM FRONT THROUGH THE
AREA WHILE THE ECMWF IS ABOUT 12 HOURS SLOWER WITH THIS FEATURE.
BOTH THE ECMWF AND THE GFS AGREE THAT THE SYSTEM FOR THIS WEEKEND
WILL BE TAPPED IN TO SOME TROPICAL MOISTURE WITH AN ATMOSPHERIC
RIVER/PINEAPPLE EXPRESS SCENARIO DEVELOPING. THE QUESTION WILL
BE...LIKE THE UPCOMING SCENARIO...WHERE DOES THE FRONT STALL. ON THE
00Z RUNS BOTH THE ECMWF AND THE GFS AIM THE HEAVIEST PRECIPITATION
INTO VANCOUVER ISLAND INITIALLY. THE GFS DROPS THE FRONT THROUGH
WESTERN WASHINGTON LATER SATURDAY INTO SUNDAY WHILE THE ECMWF KEEPS
THE FRONT HUNG UP TO THE NORTH FOR MOST OF THE WEEKEND BEFORE THE
FRONT SAGS SOUTH SUNDAY NIGHT. THIS SCENARIO WILL NEED TO BE WATCHED
CLOSELY. MODEL FREEZING LEVELS WITH THIS SCENARIO ARE A GOOD 2000
FEET HIGHER THAN THE WET FRONT COMING UP MONDAY NIGHT AND TUESDAY.
IF THE FRONT ENDS UP HANGING UP OVER WESTERN WASHINGTON THERE IS THE
POTENTIAL FOR ANOTHER FLOOD EVENT OVER THE WEEKEND. FELTON
&&
.HYDROLOGY...FROM PREVIOUS DISCUSSION...SOME CHANGES TO THE HYDRO
SCENARIO THIS MORNING WITH THE FRONT MOVING SOUTH OF THE AREA A
LITTLE FASTER THAN PREVIOUSLY PREDICTED. STILL EVEN WITH THE FRONT
MOVING SOUTH OF THE AREA QUICKER RAINFALL AMOUNTS IN THE OLYMPICS OF
4 TO 7 INCHES ARE POSSIBLE TONIGHT AND TUESDAY. THIS WILL BE ENOUGH
RAIN TO PUSH THE SOME OF THE RIVERS FLOWING OUT OF THE OLYMPICS TO
NEAR OR ABOVE FLOOD STAGE. A FLOOD WATCH WILL BE ISSUED FOR TUESDAY.
ON THE FLIP SIDE WITH THE COOLER AIR MASS PREDICTED FOR THE NORTH
CASCADES THE THREAT OF FLOODING IS DIMINISHED. PRECIPITATION AMOUNTS
FOR THE CENTRAL AND SOUTHERN CASCADES HAVE BEEN INCREASED WITH THIS
MORNING FORECAST WITH 3 TO 8 INCHES NOW EXPECTED WITH HIGHER AMOUNTS
AROUND MOUNT RAINIER. WITH THE INCREASED PRECIPITATION OVER THE
CENTRAL AND SOUTHERN CASCADES THE THREAT FOR FLOODING ON THE RIVERS
OVER SOUTHWESTERN WASHINGTON HAS INCREASED. IF THERE IS SOME
FLOODING IT WILL NOT OCCUR UNTIL WEDNESDAY AT THE EARLIEST. ANOTHER
ESF WILL BE ISSUED TO COVER THIS SCENARIO.
ANOTHER POSSIBLE FLOOD SCENARIO IS LOOMING ON THE HORIZON FOR THE
WEEKEND. CURRENT MODEL GUIDANCE PUTS THE HEAVIEST PRECIPITATION
NORTH OF WESTERN WASHINGTON BUT IT WILL TAKE VERY LITTLE CHANGE IN
THE MODEL SOLUTIONS TO PUT WESTERN WASHINGTON RIGHT IN THE HEAVY
PRECIPITATION BULLS-EYE. THIS SYSTEM IS A MORE CLASSIC ATMOSPHERIC
RIVER/PINEAPPLE EXPRESS SCENARIO WITH A WARMER AIR MASS THAN THE
UPCOMING SYSTEM. THE RIVERS WILL ALREADY BE ELEVATED DUE TO THE
UPCOMING PRECIPITATION LATER TODAY THROUGH WEDNESDAY WHICH WILL
ENHANCE THE POSSIBILITY FOR FLOODING IF THE HEAVY RAINS COME OUR
WAY. FELTON
&&
.AVIATION...A STRONG FRONT IS MOVING INTO THE CASCADES MIDDAY TODAY.
THE AIR MASS IS MOIST AND UNSTABLE TODAY WITH ISOLD TSTMS ALONG THE
COASTAL ZONES AND IN THE OLYMPICS. EXPECT AREAS OF MVFR CIGS AND VIS
IN SHOWERS EXPECTED TODAY.
ANOTHER VIGOROUS FRONT WITH VERY STRONG WINDS ALOFT WILL MOVE
THROUGH THE AREA TUE MORNING. STEADY RAIN DEVELOPING FROM WEST TO
EAST AFTER 00Z THIS EVENING. THE MAIN ISSUE WILL BE VERY STRONG
WINDS ALOFT WITH THE UPCOMING FRONTAL SYSTEM FOR TONIGHT THROUGH TUE
MORNING. AFTER EASING THIS MORNING EXPECT SW WIND AT 050 TO INCREASE
TO 50 KT 03Z THIS EVENING AND TO 70-90 KT 08Z-18Z AHEAD OF THE
FRONT. THIS STRONG FLOW WILL INTERACT WITH THE TERRAIN CAUSING AREAS
OF WIND SHEAR WITH OTHER AREAS SEEING STRONG GUSTS TO 50 KT REACHING
THE SURFACE ALONG THE COAST AND IN THE INTERIOR NORTH OF
EVERETT.
KSEA...SHOWERS WITH MAINLY BKN035 TODAY. STEADY RAIN WILL BEGIN
AFTER 00Z THIS EVENING AND CONTINUE TONIGHT WHILE INCREASING AFTER
ABOUT 09Z. GENERALLY EXPECT 5SM -RA BR BKN020 OVC035 TO DOMINATE
TONIGHT THRU TUE MORNING. S WIND AT THE TERMINAL TODAY 8-12 KT WILL
INCREASE TO 15-25 KT AFTER 03Z AND 22G35 KT AFTER 12Z. WIND AT 020
SW 60 KT AT 030 AND SW 75 KT AT 050 BY 12Z TUE AND CONTINUING
THROUGH TUE MORNING. ALBRECHT
&&
.MARINE...A STRONG FRONT MOVING EAST OF THE INLAND WATERS THIS
MORNING WILL BE FOLLOWED BY ANOTHER VERY STRONG FRONT LATE TONIGHT
INTO TUESDAY. EXPECT STORM FORCE WINDS TO DEVELOP IN THE COASTAL
WATERS THIS EVENING. FREQUENT STORM FORCE WIND GUSTS ARE EXPECTED TO
DEVELOP AT THE EAST ENTRANCE TO THE STRAIT AND IN THE NORTHERN
INLAND WATERS THIS EVENING AND CONTINUE THROUGH TUESDAY MORNING. THE
OTHER WATERS WILL SEE GALE FORCE WINDS TONIGHT INTO TUE MORNING
AHEAD OF THE FRONT.
SEAS ALONG THE COAST WILL BUILD TO 20-23 FT LATER TONIGHT THROUGH
TUE MORNING.
ANOTHER STRONG FRONT WILL MOVE THROUGH THE WATERS LATER THU OR THU
NIGHT AND WILL BE FOLLOWED BY ADDITIONAL STRONG FRONTS NEXT WEEKEND.
ALBRECHT
&&
.AVALANCHE...A SERIES OF INCREASINGLY STRONG PACIFIC STORMS WILL
ARRIVE BEGINNING MONDAY MORNING TO AFFECT THE MOUNTAINS WITH HEAVY
SNOWFALL...GRADUAL WARMING AND VERY STRONG WINDS. THIS WEATHER WILL
PRODUCE A SIGNIFICANT INCREASE IN THE CURRENT LEVEL OF AVALANCHE
DANGER OVER THE NEXT FEW DAYS, ESPECIALLY HIGHER ELEVATIONS WHERE A
DEEPER EARLY SEASON SNOWPACK EXISTS. WEAK LOW DENSITY SNOW FROM
PREVIOUS STORMS AS WELL AS A VARIETY OF BURIED WEAK LAYERS IN THE
SNOWPACK WILL BE SUSCEPTIBLE TO THE INCREASED LOAD FROM THE NEW
DENSER WIND DRIVEN SNOW LAYERS. AN AVALANCHE WARNING WILL BE ISSUED
LATER MONDAY MORNING TO COVER THIS EXPECTED INCREASE IN DANGER. MORE
DETAILS AT NWAC.US
KRAMER
&&
.AVALANCHE...A SERIES OF INCREASINGLY STRONG PACIFIC STORMS WILL
ARRIVE BEGINNING MONDAY MORNING TO AFFECT THE MOUNTAINS WITH HEAVY
SNOWFALL...GRADUAL WARMING AND VERY STRONG WINDS. THIS WEATHER WILL
PRODUCE A SIGNIFICANT INCREASE IN THE CURRENT LEVEL OF AVALANCHE
DANGER OVER THE NEXT FEW DAYS, ESPECIALLY HIGHER ELEVATIONS WHERE A
DEEPER EARLY SEASON SNOWPACK EXISTS. WEAK LOW DENSITY SNOW FROM
PREVIOUS STORMS AS WELL AS A VARIETY OF BURIED WEAK LAYERS IN THE
SNOWPACK WILL BE SUSCEPTIBLE TO THE INCREASED LOAD FROM THE NEW
DENSER WIND DRIVEN SNOW LAYERS. AN AVALANCHE WARNING WILL BE ISSUED
LATER MONDAY MORNING TO COVER THIS EXPECTED INCREASE IN DANGER. MORE
DETAILS AT NWAC.US
KRAMER
&&
.SEW WATCHES/WARNINGS/ADVISORIES...
WA...HIGH WIND WARNING THIS EVENING THROUGH MIDDAY TUESDAY
FOR THE COAST...OLYMPIC MOUNTAINS...WESTERN WHATCOM...WESTERN
SKAGIT...SAN JUAN ISLANDS... AND ADMIRALTY INLET AREA.
WIND ADVISORY THIS EVENING THROUGH MIDDAY TUESDAY FOR REMAINDER
OF WESTERN WASHINGTON EXCEPT CASCADES.
WINTER STORM WARNING TONIGHT THROUGH TUESDAY NIGHT FOR THE
NORTH WASHINGTON CASCADES ABOVE 3500 FEET.
FLOOD WATCH MASON...GRAYS HARBOR...JEFFERSON AND CLALLAM COUNTY.
PZ...STORM WARNING COAST...EAST ENTRANCE TO THE STRAIT...AND NORTHERN
INLAND WATERS THROUGH TUE MORNING.
GALE WARNING WEST AND CENTRAL STRAIT...ADMIRALTY INLET...AND
PUGET SOUND AND HOOD CANAL THROUGH TUE MORNING.
SMALL CRAFT ADVISORY FOR ROUGH GRAYS HARBOR BAR.In the hours before
Local storm report, Nov 21, 8:44 AM PST, 1 hour 29 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SEATTLE WA
844 AM PST MON NOV 21 2011
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0635 AM SNOW 2 SE NORTH BEND 47.48N 121.76W
11/21/2011 M0.6 INCH KING WA TRAINED SPOTTER
SNOWFALL IN THE PAST HOUR. WIND 20 MPH GUSTING TO 35 MPH.
&&
GRUBThe office that day
Everything else NWS Seattle, WA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 20, 4:20 PM PST | High Wind Watch | SEW | San Juan | 19 hr |
| Nov 20, 4:20 PM PST | Wind Advisory | SEW | San Juan | 20 hr |
| Nov 20, 4:31 PM PST | Gale Watch | SEW | 11 hr | |
| Nov 20, 4:31 PM PST | Small Craft Advisory for Rough Bar | SEW | 8 days | |
| Nov 20, 4:31 PM PST | Small Craft Advisory for Winds | SEW | 17 hr | |
| Nov 20, 4:31 PM PST | Storm Watch | SEW | 11 hr | |
| Nov 21, 4:34 AM PST | Winter Storm Watch | SEW | 6 hr | |
| Nov 21, 4:39 AM PST | Flood Watch | SEW | Clallam, Grays Harbor, Jefferson, King, Lewis, Mason and 4 more | 3 days |
| Nov 21, 9:14 AM PST | Storm Warning | SEW | 18 hr | |
| Nov 21, 9:51 AM PST | High Wind Warning | SEW | San Juan | 24 hr |
| Nov 21, 9:51 AM PST | Wind Advisory | SEW | 15 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.