Alert archive / Washington / Wind Advisories in 2009
Wind Advisory 23, NWS Seattle, WA
NWS Seattle, WA issued this wind advisory at Nov 21, 2009, 10:13 AM PST for San Juan County, Washington. It took effect at Nov 21, 2009, 12:00 PM PST. It was in force for 17 hr.
The area
The counties it named.
The facts
- Issued
- Nov 21, 2009, 10:13 AM PST (18:13 UTC)
- In effect from
- Nov 21, 2009, 12:00 PM PST
- Expired
- Nov 22, 2009, 4:31 AM PST
- In force
- 17 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 18:10 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, 6.2 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
- 18 J/kg
- Mixed-layer CIN
- -8 J/kg
- Mixed-layer LCL
- 1040 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- 72 m²/s²
- 0-3 km storm-relative helicity
- 132 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WWUS76 KSEW 211813 NPWSEW URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE SEATTLE WA 1013 AM PST SAT NOV 21 2009 WAZ001-503-506-220215- /O.NEW.KSEW.WI.Y.0023.091121T2000Z-091122T1200Z/ SAN JUAN COUNTY-WESTERN WHATCOM COUNTY-WESTERN SKAGIT COUNTY- 1013 AM PST SAT NOV 21 2009 ...WIND ADVISORY IN EFFECT UNTIL 4 AM PST SUNDAY... THE NATIONAL WEATHER SERVICE IN SEATTLE HAS ISSUED A WIND ADVISORY...WHICH IS IN EFFECT UNTIL 4 AM PST SUNDAY. STRONG SOUTHERLY WINDS ARE EXPECTED LATE THIS AFTERNOON AND EVENING. SUSTAINED SPEEDS OF 25 TO 35 MPH WITH GUSTS TO AROUND 40 MPH. WINDS WILL EASE EARLY SUNDAY MORNING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WIND ADVISORY IS ISSUED WHEN SUSTAINED WINDS OF 30 TO 39 MPH OR GUSTS OF 45 TO 57 MPH ARE LIKELY. WINDS THIS STRONG CAN SNAP SMALL TREE BRANCHES...TOPPLE SMALL OR SHALLOW-ROOTED TREES...AND CAUSE LOCAL POWER OUTAGES. && $$ WAZ510-220215- /O.NEW.KSEW.WI.Y.0023.091121T2000Z-091122T2000Z/ ADMIRALTY INLET AREA- 1013 AM PST SAT NOV 21 2009 ...WIND ADVISORY IN EFFECT UNTIL NOON PST SUNDAY... THE NATIONAL WEATHER SERVICE IN SEATTLE HAS ISSUED A WIND ADVISORY...WHICH IS IN EFFECT UNTIL NOON PST SUNDAY. STRONG SOUTHERLY WINDS ARE EXPECTED LATE THIS AFTERNOON AND EVENING FOLLOWED BY STRONG NORTHWESTERLY WINDS EARLY SUNDAY MORNING. SUSTAINED SPEEDS OF 25 TO 35 MPH WITH GUSTS TO AROUND 40 MPH ACROSS THE NORTH INTERIOR. WINDS WILL EASE SUNDAY AFTERNOON. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WIND ADVISORY IS ISSUED WHEN SUSTAINED WINDS OF 30 TO 39 MPH OR GUSTS OF 45 TO 57 MPH ARE LIKELY. WINDS THIS STRONG CAN SNAP SMALL TREE BRANCHES...TOPPLE SMALL OR SHALLOW-ROOTED TREES...AND CAUSE LOCAL POWER OUTAGES. && $$ WAZ514-220215- /O.NEW.KSEW.WI.Y.0023.091122T1200Z-091122T2000Z/ EASTERN STRAIT OF JUAN DE FUCA- 1013 AM PST SAT NOV 21 2009 ...WIND ADVISORY IN EFFECT FROM 4 AM TO NOON PST SUNDAY... THE NATIONAL WEATHER SERVICE IN SEATTLE HAS ISSUED A WIND ADVISORY...WHICH IS IN EFFECT FROM 4 AM TO NOON PST SUNDAY. STRONG WESTERLY WINDS ARE EXPECTED EARLY SUNDAY MORNING. SUSTAINED SPEEDS OF 25 TO 35 MPH WITH GUSTS TO AROUND 40 MPH. WINDS WILL EASE SUNDAY AFTERNOON. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WIND ADVISORY IS ISSUED WHEN SUSTAINED WINDS OF 30 TO 39 MPH OR GUSTS OF 45 TO 57 MPH ARE LIKELY. WINDS THIS STRONG CAN SNAP SMALL TREE BRANCHES...TOPPLE SMALL OR SHALLOW-ROOTED TREES...AND CAUSE LOCAL POWER OUTAGES. && $$ WAZ504-512-517-220215- /O.NEW.KSEW.HW.A.0008.091122T0800Z-091122T1800Z/ SOUTHWEST INTERIOR-LOWER CHEHALIS VALLEY AREA-CENTRAL COAST- 1013 AM PST SAT NOV 21 2009 ...HIGH WIND WATCH IN EFFECT FROM LATE TONIGHT THROUGH SUNDAY MORNING... THE NATIONAL WEATHER SERVICE IN SEATTLE HAS ISSUED A HIGH WIND WATCH...WHICH IS IN EFFECT FROM LATE TONIGHT THROUGH SUNDAY MORNING. STRONG WESTERLY WINDS MAY DEVELOP ALONG THE CENTRAL COAST THROUGH THE CHEHALIS GAP AND INTO THE SOUTHWEST INTERIOR SOUTH OF OLYPMIA LATE TONIGHT AND INTO SUNDAY MORNING...WITH SUSTAINED SPEEDS OF 35 TO 45 MPH AND GUSTS TO 70 MPH. WINDS WILL EASE SUNDAY AFTERNOON. PRECAUTIONARY/PREPAREDNESS ACTIONS... A HIGH WIND WATCH MEANS CONDITIONS ARE FAVORABLE FOR DAMAGING WINDS. HIGH WINDS CAN TOPPLE TREES...DOWN POWER LINES...AND DAMAGE SOME STRUCTURES. && $$
4 follow-up statements
000 WWUS76 KSEW 212308 NPWSEW URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE SEATTLE WA 308 PM PST SAT NOV 21 2009 WAZ510-221245- /O.UPG.KSEW.WI.Y.0023.000000T0000Z-091122T2000Z/ /O.NEW.KSEW.HW.W.0006.091122T0000Z-091122T1800Z/ ADMIRALTY INLET AREA- 308 PM PST SAT NOV 21 2009 ...HIGH WIND WARNING IN EFFECT UNTIL 10 AM PST SUNDAY... THE NATIONAL WEATHER SERVICE IN SEATTLE HAS ISSUED A HIGH WIND WARNING...WHICH IS IN EFFECT UNTIL 10 AM PST SUNDAY. THE WIND ADVISORY IS NO LONGER IN EFFECT. STRONG SOUTHERLY WINDS ARE EXPECTED LATE THIS AFTERNOON AND EVENING AHEAD OF A DEEPENING SURFACE LOW THAT WILL MOVE INTO WESTERN WASHINGTON LATE TONIGHT. WINDS WILL BECOME NORTHERLY AND REMAIN STRONG AS THE LOW LIFTS THROUGH THE INTERIOR SUNDAY MORNING. SUSTAINED WINDS WILL REACH 35 TO 45 MPH WITH GUSTS TO AROUND 60 MPH. WINDS WILL BEGIN TO EASE LATE SUNDAY MORNING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A HIGH WIND WARNING MEANS THAT A HAZARDOUS WIND EVENT IS IMMINENT OR OCCURRING. SUSTAINED WINDS OF AT LEAST 40 MPH...OR GUSTS OF 58 MPH OR HIGHER WILL OCCUR ACROSS THE LOWLANDS. && $$ WAZ001-503-506-221245- /O.NEW.KSEW.HW.W.0006.091122T0000Z-091122T0800Z/ /O.EXT.KSEW.WI.Y.0023.000000T0000Z-091122T1800Z/ SAN JUAN COUNTY-WESTERN WHATCOM COUNTY-WESTERN SKAGIT COUNTY- 308 PM PST SAT NOV 21 2009 ...HIGH WIND WARNING IN EFFECT UNTIL MIDNIGHT PST TONIGHT... ...WIND ADVISORY NOW IN EFFECT FROM MIDNIGHT TONIGHT TO 10 AM PST SUNDAY... THE NATIONAL WEATHER SERVICE IN SEATTLE HAS ISSUED A HIGH WIND WARNING...WHICH IS IN EFFECT UNTIL MIDNIGHT PST TONIGHT. THE WIND ADVISORY IS NOW IN EFFECT FROM MIDNIGHT TONIGHT TO 10 AM PST SUNDAY. STRONG SOUTHERLY WINDS ARE EXPECTED LATE THIS AFTERNOON AND EVENING AHEAD OF A DEEPENING SURFACE LOW THAT WILL MOVE INTO WESTERN WASHINGTON OVERNIGHT. SUSTAINED WINDS WILL REACH 35 TO 45 MPH WITH GUSTS TO AROUND 60 MPH. WINDS WILL BECOME NORWESTERLY AND EASE SOMEWHAT AS THE LOW LIFTS THROUGH THE INTERIOR SUNDAY MORNING. SUSTAINED WINDS WILL REACH 25 TO 35 MPH WITH GUSTS TO AROUND 45 MPH. WINDS WILL BEGIN TO EASE LATE SUNDAY MORNING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A HIGH WIND WARNING MEANS THAT A HAZARDOUS WIND EVENT IS IMMINENT OR OCCURRING. SUSTAINED WINDS OF AT LEAST 40 MPH...OR GUSTS OF 58 MPH OR HIGHER WILL OCCUR ACROSS THE LOWLANDS. A WIND ADVISORY IS ISSUED WHEN SUSTAINED WINDS OF 30 TO 39 MPH OR GUSTS OF 45 TO 57 MPH ARE LIKELY. WINDS THIS STRONG CAN SNAP SMALL TREE BRANCHES...TOPPLE SMALL OR SHALLOW-ROOTED TREES...AND CAUSE LOCAL POWER OUTAGES. && $$ WAZ517-221245- /O.UPG.KSEW.HW.A.0008.091122T0800Z-091122T1800Z/ /O.NEW.KSEW.HW.W.0006.091122T0000Z-091122T1800Z/ CENTRAL COAST- 308 PM PST SAT NOV 21 2009 ...HIGH WIND WARNING IN EFFECT UNTIL 10 AM PST SUNDAY... THE NATIONAL WEATHER SERVICE IN SEATTLE HAS ISSUED A HIGH WIND WARNING...WHICH IS IN EFFECT UNTIL 10 AM PST SUNDAY. THE HIGH WIND WATCH IS NO LONGER IN EFFECT. STRONG SOUTHERLY WINDS ARE EXPECTED LATE THIS AFTERNOON AND EVENING AHEAD OF A DEEPENING SURFACE LOW THAT WILL MOVE INTO WESTERN WASHINGTON LATE TONIGHT. WINDS WILL BECOME NORTHWESTERLY AND REMAIN STRONG AS THE LOW LIFTS THROUGH THE INTERIOR EARLY SUNDAY MORNING. SUSTAINED WINDS WILL REACH 35 TO 45 MPH WITH GUSTS TO AROUND 70 MPH. WINDS WILL BEGIN TO EASE LATE SUNDAY MORNING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A HIGH WIND WARNING MEANS THAT A HAZARDOUS WIND EVENT IS IMMINENT OR OCCURRING. SUSTAINED WINDS OF AT LEAST 40 MPH...OR GUSTS OF 58 MPH OR HIGHER WILL OCCUR ACROSS THE LOWLANDS. && $$ WAZ504-512-221245- /O.UPG.KSEW.HW.A.0008.091122T0800Z-091122T1800Z/ /O.NEW.KSEW.HW.W.0006.091122T0800Z-091122T1800Z/ SOUTHWEST INTERIOR-LOWER CHEHALIS VALLEY AREA- 308 PM PST SAT NOV 21 2009 ...HIGH WIND WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 10 AM PST SUNDAY... THE NATIONAL WEATHER SERVICE IN SEATTLE HAS ISSUED A HIGH WIND WARNING...WHICH IS IN EFFECT FROM MIDNIGHT TONIGHT TO 10 AM PST SUNDAY. THE HIGH WIND WATCH IS NO LONGER IN EFFECT. STRONG WESTERLY WINDS ARE EXPECTED LATE TONIGHT AS THE A DEEP SURFACE LOW LIFTS THROUGH THE INTERIOR AFTER MIDNIGHT. SUSTAINED WINDS WILL REACH 35 TO 45 MPH WITH GUSTS TO AROUND 60 MPH. WINDS WILL EASE LATE SUNDAY MORNING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A HIGH WIND WARNING MEANS THAT A HAZARDOUS WIND EVENT IS IMMINENT OR OCCURRING. SUSTAINED WINDS OF AT LEAST 40 MPH...OR GUSTS OF 58 MPH OR HIGHER WILL OCCUR ACROSS THE LOWLANDS. && $$ WAZ505-507>509-511-515-221245- /O.EXB.KSEW.WI.Y.0023.091122T0800Z-091122T1800Z/ EAST PUGET SOUND LOWLANDS-EVERETT AND VICINITY- SEATTLE/BREMERTON AREA-TACOMA AREA-HOOD CANAL AREA- WESTERN STRAIT OF JUAN DE FUCA- 308 PM PST SAT NOV 21 2009 ...WIND ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 10 AM PST SUNDAY... THE NATIONAL WEATHER SERVICE IN SEATTLE HAS ISSUED A WIND ADVISORY...WHICH IS IN EFFECT FROM MIDNIGHT TONIGHT TO 10 AM PST SUNDAY. STRONG WESTERLY WINDS ARE EXPECTED LATE TONIGHT AS THE A DEEP SURFACE LOW LIFTS THROUGH THE INTERIOR AFTER MIDNIGHT. SUSTAINED WINDS WILL REACH 25 TO 55 MPH WITH GUSTS TO AROUND 45 MPH. WINDS WILL EASE LATE SUNDAY MORNING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WIND ADVISORY IS ISSUED WHEN SUSTAINED WINDS OF 30 TO 39 MPH OR GUSTS OF 45 TO 57 MPH ARE LIKELY. WINDS THIS STRONG CAN SNAP SMALL TREE BRANCHES...TOPPLE SMALL OR SHALLOW-ROOTED TREES...AND CAUSE LOCAL POWER OUTAGES. && $$ WAZ514-221245- /O.EXT.KSEW.WI.Y.0023.091122T0800Z-091122T1800Z/ EASTERN STRAIT OF JUAN DE FUCA- 308 PM PST SAT NOV 21 2009 ...WIND ADVISORY NOW IN EFFECT FROM MIDNIGHT TONIGHT TO 10 AM PST SUNDAY... STRONG WESTERLY WINDS ARE EXPECTED LATE TONIGHT AS A DEEP SURFACE LOW LIFTS THROUGH THE INTERIOR AFTER MIDNIGHT. SUSTAINED WINDS WILL REACH 25 TO 35 MPH WITH GUSTS TO AROUND 45 MPH. WINDS WILL EASE LATE SUNDAY MORNING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WIND ADVISORY IS ISSUED WHEN SUSTAINED WINDS OF 30 TO 39 MPH OR GUSTS OF 45 TO 57 MPH ARE LIKELY. WINDS THIS STRONG CAN SNAP SMALL TREE BRANCHES...TOPPLE SMALL OR SHALLOW-ROOTED TREES...AND CAUSE LOCAL POWER OUTAGES. && $$
000 WWUS76 KSEW 220013 CCA NPWSEW URGENT - WEATHER MESSAGE...CORRECTED NATIONAL WEATHER SERVICE SEATTLE WA 406 PM PST SAT NOV 21 2009 CORRECTED EXPECTED SPEEDS FOR LOWLAND INTERIOR WAZ510-221400- /O.UPG.KSEW.WI.Y.0023.000000T0000Z-091122T2000Z/ /O.NEW.KSEW.HW.W.0006.091122T0006Z-091122T1800Z/ ADMIRALTY INLET AREA- 406 PM PST SAT NOV 21 2009 ...HIGH WIND WARNING IN EFFECT UNTIL 10 AM PST SUNDAY... THE NATIONAL WEATHER SERVICE IN SEATTLE HAS ISSUED A HIGH WIND WARNING...WHICH IS IN EFFECT UNTIL 10 AM PST SUNDAY. THE WIND ADVISORY IS NO LONGER IN EFFECT. STRONG SOUTHERLY WINDS ARE EXPECTED LATE THIS AFTERNOON AND EVENING AHEAD OF A DEEPENING SURFACE LOW THAT WILL MOVE INTO WESTERN WASHINGTON LATE TONIGHT. WINDS WILL BECOME NORTHERLY AND REMAIN STRONG AS THE LOW LIFTS THROUGH THE INTERIOR SUNDAY MORNING. SUSTAINED WINDS WILL REACH 35 TO 45 MPH WITH GUSTS TO AROUND 60 MPH. WINDS WILL BEGIN TO EASE LATE SUNDAY MORNING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A HIGH WIND WARNING MEANS THAT A HAZARDOUS WIND EVENT IS IMMINENT OR OCCURRING. SUSTAINED WINDS OF AT LEAST 40 MPH...OR GUSTS OF 58 MPH OR HIGHER WILL OCCUR ACROSS THE LOWLANDS. && $$ WAZ001-503-506-221400- /O.NEW.KSEW.HW.W.0006.091122T0006Z-091122T0800Z/ /O.EXT.KSEW.WI.Y.0023.000000T0000Z-091122T1800Z/ SAN JUAN COUNTY-WESTERN WHATCOM COUNTY-WESTERN SKAGIT COUNTY- 406 PM PST SAT NOV 21 2009 ...HIGH WIND WARNING IN EFFECT UNTIL MIDNIGHT PST TONIGHT... ...WIND ADVISORY NOW IN EFFECT FROM MIDNIGHT TONIGHT TO 10 AM PST SUNDAY... THE NATIONAL WEATHER SERVICE IN SEATTLE HAS ISSUED A HIGH WIND WARNING...WHICH IS IN EFFECT UNTIL MIDNIGHT PST TONIGHT. THE WIND ADVISORY IS NOW IN EFFECT FROM MIDNIGHT TONIGHT TO 10 AM PST SUNDAY. STRONG SOUTHERLY WINDS ARE EXPECTED LATE THIS AFTERNOON AND EVENING AHEAD OF A DEEPENING SURFACE LOW THAT WILL MOVE INTO WESTERN WASHINGTON OVERNIGHT. SUSTAINED WINDS WILL REACH 35 TO 45 MPH WITH GUSTS TO AROUND 60 MPH. WINDS WILL BECOME NORWESTERLY AND EASE SOMEWHAT AS THE LOW LIFTS THROUGH THE INTERIOR SUNDAY MORNING. SUSTAINED WINDS WILL REACH 25 TO 35 MPH WITH GUSTS TO AROUND 45 MPH. WINDS WILL BEGIN TO EASE LATE SUNDAY MORNING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A HIGH WIND WARNING MEANS THAT A HAZARDOUS WIND EVENT IS IMMINENT OR OCCURRING. SUSTAINED WINDS OF AT LEAST 40 MPH...OR GUSTS OF 58 MPH OR HIGHER WILL OCCUR ACROSS THE LOWLANDS. A WIND ADVISORY IS ISSUED WHEN SUSTAINED WINDS OF 30 TO 39 MPH OR GUSTS OF 45 TO 57 MPH ARE LIKELY. WINDS THIS STRONG CAN SNAP SMALL TREE BRANCHES...TOPPLE SMALL OR SHALLOW-ROOTED TREES...AND CAUSE LOCAL POWER OUTAGES. && $$ WAZ517-221400- /O.UPG.KSEW.HW.A.0008.091122T0800Z-091122T1800Z/ /O.NEW.KSEW.HW.W.0006.091122T0006Z-091122T1800Z/ CENTRAL COAST- 406 PM PST SAT NOV 21 2009 ...HIGH WIND WARNING IN EFFECT UNTIL 10 AM PST SUNDAY... THE NATIONAL WEATHER SERVICE IN SEATTLE HAS ISSUED A HIGH WIND WARNING...WHICH IS IN EFFECT UNTIL 10 AM PST SUNDAY. THE HIGH WIND WATCH IS NO LONGER IN EFFECT. STRONG SOUTHERLY WINDS ARE EXPECTED LATE THIS AFTERNOON AND EVENING AHEAD OF A DEEPENING SURFACE LOW THAT WILL MOVE INTO WESTERN WASHINGTON LATE TONIGHT. WINDS WILL BECOME NORTHWESTERLY AND REMAIN STRONG AS THE LOW LIFTS THROUGH THE INTERIOR EARLY SUNDAY MORNING. SUSTAINED WINDS WILL REACH 35 TO 45 MPH WITH GUSTS TO AROUND 70 MPH. WINDS WILL BEGIN TO EASE LATE SUNDAY MORNING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A HIGH WIND WARNING MEANS THAT A HAZARDOUS WIND EVENT IS IMMINENT OR OCCURRING. SUSTAINED WINDS OF AT LEAST 40 MPH...OR GUSTS OF 58 MPH OR HIGHER WILL OCCUR ACROSS THE LOWLANDS. && $$ WAZ504-512-221400- /O.UPG.KSEW.HW.A.0008.091122T0800Z-091122T1800Z/ /O.NEW.KSEW.HW.W.0006.091122T0800Z-091122T1800Z/ SOUTHWEST INTERIOR-LOWER CHEHALIS VALLEY AREA- 406 PM PST SAT NOV 21 2009 ...HIGH WIND WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 10 AM PST SUNDAY... THE NATIONAL WEATHER SERVICE IN SEATTLE HAS ISSUED A HIGH WIND WARNING...WHICH IS IN EFFECT FROM MIDNIGHT TONIGHT TO 10 AM PST SUNDAY. THE HIGH WIND WATCH IS NO LONGER IN EFFECT. STRONG WESTERLY WINDS ARE EXPECTED LATE TONIGHT AS THE A DEEP SURFACE LOW LIFTS THROUGH THE INTERIOR AFTER MIDNIGHT. SUSTAINED WINDS WILL REACH 35 TO 45 MPH WITH GUSTS TO AROUND 60 MPH. WINDS WILL EASE LATE SUNDAY MORNING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A HIGH WIND WARNING MEANS THAT A HAZARDOUS WIND EVENT IS IMMINENT OR OCCURRING. SUSTAINED WINDS OF AT LEAST 40 MPH...OR GUSTS OF 58 MPH OR HIGHER WILL OCCUR ACROSS THE LOWLANDS. && $$ WAZ505-507>509-511-515-221400- /O.COR.KSEW.WI.Y.0023.091122T0800Z-091122T1800Z/ EAST PUGET SOUND LOWLANDS-EVERETT AND VICINITY- SEATTLE/BREMERTON AREA-TACOMA AREA-HOOD CANAL AREA- WESTERN STRAIT OF JUAN DE FUCA- 406 PM PST SAT NOV 21 2009 ...WIND ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 10 AM PST SUNDAY... THE NATIONAL WEATHER SERVICE IN SEATTLE HAS ISSUED A WIND ADVISORY...WHICH IS IN EFFECT FROM MIDNIGHT TONIGHT TO 10 AM PST SUNDAY. STRONG WESTERLY WINDS ARE EXPECTED LATE TONIGHT AS THE A DEEP SURFACE LOW LIFTS THROUGH THE INTERIOR AFTER MIDNIGHT. SUSTAINED WINDS WILL REACH 25 TO 35 MPH WITH GUSTS TO AROUND 45 MPH. WINDS WILL EASE LATE SUNDAY MORNING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WIND ADVISORY IS ISSUED WHEN SUSTAINED WINDS OF 30 TO 39 MPH OR GUSTS OF 45 TO 57 MPH ARE LIKELY. WINDS THIS STRONG CAN SNAP SMALL TREE BRANCHES...TOPPLE SMALL OR SHALLOW-ROOTED TREES...AND CAUSE LOCAL POWER OUTAGES. && $$ WAZ514-221400- /O.EXT.KSEW.WI.Y.0023.091122T0800Z-091122T1800Z/ EASTERN STRAIT OF JUAN DE FUCA- 406 PM PST SAT NOV 21 2009 ...WIND ADVISORY NOW IN EFFECT FROM MIDNIGHT TONIGHT TO 10 AM PST SUNDAY... STRONG WESTERLY WINDS ARE EXPECTED LATE TONIGHT AS A DEEP SURFACE LOW LIFTS THROUGH THE INTERIOR AFTER MIDNIGHT. SUSTAINED WINDS WILL REACH 25 TO 35 MPH WITH GUSTS TO AROUND 45 MPH. WINDS WILL EASE LATE SUNDAY MORNING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WIND ADVISORY IS ISSUED WHEN SUSTAINED WINDS OF 30 TO 39 MPH OR GUSTS OF 45 TO 57 MPH ARE LIKELY. WINDS THIS STRONG CAN SNAP SMALL TREE BRANCHES...TOPPLE SMALL OR SHALLOW-ROOTED TREES...AND CAUSE LOCAL POWER OUTAGES. && $$
000 WWUS76 KSEW 220647 NPWSEW URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE SEATTLE WA 1047 PM PST SAT NOV 21 2009 .OVERVIEW...A DEEP LOW PRESSURE SYSTEM IN THE OFFSHORE WATERS WILL MOVE RAPIDLY ONSHORE ALONG THE CENTRAL COAST DURING THE EARLY MORNING HOURS...THEN MOVE INLAND ACROSS THE FAR SOUTH PUGET SOUND AND INTO THE CENTRAL CASCADES BY 8 AM. WAZ001-503-506-221500- /O.CAN.KSEW.HW.W.0006.000000T0000Z-091122T0800Z/ /O.CON.KSEW.WI.Y.0023.000000T0000Z-091122T1800Z/ SAN JUAN COUNTY-WESTERN WHATCOM COUNTY-WESTERN SKAGIT COUNTY- 1047 PM PST SAT NOV 21 2009 ...WIND ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST SUNDAY... ...HIGH WIND WARNING IS CANCELLED... THE NATIONAL WEATHER SERVICE IN SEATTLE HAS CANCELLED THE HIGH WIND WARNING. A WIND ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST SUNDAY. SOUTHEAST WINDS ACROSS THE NORTHWEST INTERIOR WILL TURN NORTHEAST AND DIMINISH BY MIDNIGHT. WINDS WILL RAPIDLY INCREASE TO NORTHWEST 25 TO 35 MPH WITH GUSTS TO 55 MPH AFTER 4 AM AND WILL CONTINUE UNTIL ABOUT 8 AM BEFORE SLOWLY DIMINISHING DURING THE LATE MORNING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WIND ADVISORY IS ISSUED WHEN SUSTAINED WINDS OF 30 TO 39 MPH OR GUSTS OF 45 TO 57 MPH ARE LIKELY. WINDS THIS STRONG CAN SNAP SMALL TREE BRANCHES...TOPPLE SMALL OR SHALLOW-ROOTED TREES...AND CAUSE LOCAL POWER OUTAGES. && $$ WAZ514-515-221500- /O.UPG.KSEW.WI.Y.0023.091122T0800Z-091122T1800Z/ /O.EXA.KSEW.HW.W.0006.000000T0000Z-091122T1800Z/ EASTERN STRAIT OF JUAN DE FUCA-WESTERN STRAIT OF JUAN DE FUCA- 1047 PM PST SAT NOV 21 2009 ...HIGH WIND WARNING IN EFFECT UNTIL 10 AM PST SUNDAY... THE NATIONAL WEATHER SERVICE IN SEATTLE HAS ISSUED A HIGH WIND WARNING...WHICH IS IN EFFECT UNTIL 10 AM PST SUNDAY. THE WIND ADVISORY IS NO LONGER IN EFFECT. EAST WINDS 15 TO 30 MPH WILL RAPIDLY SHIFT TO WESTERLY AROUND 4 AM AND INCREASE TO 30 TO 45 MPH WITH GUSTS TO 65 MPH. THE HIGHEST WINDS WILL BE ALONG THE IMMEDIATE SHORELINE OF THE STRAIT OF JUAN DE FUCA BETWEEN 4 AM AND 8 AM. WINDS WILL DIMINISH LATER SUNDAY MORNING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A HIGH WIND WARNING MEANS THAT A HAZARDOUS WIND EVENT IS IMMINENT OR OCCURRING. HIGH WINDS CAN TOPPLE TREES...DOWN POWER LINES...AND DESTROY PROPERTY. && $$ WAZ516-221500- /O.EXA.KSEW.HW.W.0006.000000T0000Z-091122T1800Z/ NORTH COAST- 1047 PM PST SAT NOV 21 2009 ...HIGH WIND WARNING IN EFFECT UNTIL 10 AM PST SUNDAY... THE NATIONAL WEATHER SERVICE IN SEATTLE HAS ISSUED A HIGH WIND WARNING...WHICH IS IN EFFECT UNTIL 10 AM PST SUNDAY. WHILE SOUTHEAST WINDS WILL TURN NORTHEAST AND DIMINISH AROUND MIDNIGHT...STRONG WEST WINDS OF 35 TO 45 MPH WITH GUSTS TO 70 MPH WILL RAPIDLY DEVELOP AROUND 4 AM. THE STRONG WINDS WILL LAST FOR 3 TO 5 HOURS BEFORE DIMINISHING SUNDAY MORNING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A HIGH WIND WARNING MEANS THAT A HAZARDOUS WIND EVENT IS IMMINENT OR OCCURRING. SUSTAINED WINDS OF AT LEAST 40 MPH...OR GUSTS OF 58 MPH OR HIGHER WILL OCCUR ACROSS THE LOWLANDS. && $$ WAZ504-512-221500- /O.EXT.KSEW.HW.W.0006.091122T0647Z-091122T1800Z/ SOUTHWEST INTERIOR-LOWER CHEHALIS VALLEY AREA- 1047 PM PST SAT NOV 21 2009 ...HIGH WIND WARNING NOW IN EFFECT UNTIL 10 AM PST SUNDAY... THE HIGH WIND WARNING IS NOW IN EFFECT UNTIL 10 AM PST SUNDAY. STRONG WESTERLY WINDS OF 30 TO 40 MPH WITH GUSTS TO 65 MPH ARE EXPECTED TO DEVELOP AROUND 4 AM AND LAST FOR 3 TO 5 HOURS BEFORE DIMINISHING. STRONGEST WINDS WILL BE IN THE LOWER CHEHALIS VALLEY AND IN THE CHEHALIS GAP...EAST-WEST VALLEYS EXPOSED TO WESTERLY FLOW. PRECAUTIONARY/PREPAREDNESS ACTIONS... A HIGH WIND WARNING MEANS THAT A HAZARDOUS WIND EVENT IS IMMINENT OR OCCURRING. SUSTAINED WINDS OF AT LEAST 40 MPH...OR GUSTS OF 58 MPH OR HIGHER WILL OCCUR ACROSS THE LOWLANDS. && $$ WAZ510-517-221500- /O.CON.KSEW.HW.W.0006.000000T0000Z-091122T1800Z/ ADMIRALTY INLET AREA-CENTRAL COAST- 1047 PM PST SAT NOV 21 2009 ...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 10 AM PST SUNDAY... A HIGH WIND WARNING REMAINS IN EFFECT UNTIL 10 AM PST SUNDAY. SOUTHEAST WINDS OF 20 TO 30 MPH WILL SHIFT TO WEST OR NORTHWEST AND INCREASE TO 35 TO 45 MPH WITH GUSTS TO 70 MPH AROUND 4 AM. THE STRONG WINDS WILL LAST FOR ABOUT 3 TO 5 HOURS BEFORE DIMINISHING LATER SUNDAY MORNING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A HIGH WIND WARNING MEANS THAT A HAZARDOUS WIND EVENT IS IMMINENT OR OCCURRING. SUSTAINED WINDS OF AT LEAST 40 MPH...OR GUSTS OF 58 MPH OR HIGHER WILL OCCUR ACROSS THE LOWLANDS. && $$ WAZ505-507>509-511-221500- /O.EXT.KSEW.WI.Y.0023.091122T0647Z-091122T1800Z/ EAST PUGET SOUND LOWLANDS-EVERETT AND VICINITY- SEATTLE/BREMERTON AREA-TACOMA AREA-HOOD CANAL AREA- 1047 PM PST SAT NOV 21 2009 ...WIND ADVISORY NOW IN EFFECT UNTIL 10 AM PST SUNDAY... THE WIND ADVISORY IS NOW IN EFFECT UNTIL 10 AM PST SUNDAY. WINDS AROUND THE EVERETT AREA...AND TO THE SOUTH OF THE SEATTLE AREA WILL RAPIDLY INCREASE AROUND 5 AM. VERY WINDY CONDITIONS WILL LAST FOR 3 TO 5 HOURS...THEN WINDS WILL DIMINISH LATER SUNDAY MORNING. NORTHWEST WINDS OF 25 TO 35 MPH WITH GUSTS TO 55 MPH CAN BE EXPECTED IN THE EVERETT AREA...AND STRONG SOUTHWEST WINDS OF 25 TO 35 MPH WITH GUSTS TO 55 MPH CAN BE EXPECTED EARLY SUNDAY MORNING SOUTH OF SEATTLE. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WIND ADVISORY IS ISSUED WHEN SUSTAINED WINDS OF 30 TO 39 MPH OR GUSTS OF 45 TO 57 MPH ARE LIKELY. WINDS THIS STRONG CAN SNAP SMALL TREE BRANCHES...TOPPLE SMALL OR SHALLOW-ROOTED TREES...AND CAUSE LOCAL POWER OUTAGES. && $$ ALBRECHT WEATHER.GOV/SEATTLE
000 WWUS76 KSEW 221231 NPWSEW URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE SEATTLE WA 431 AM PST SUN NOV 22 2009 .THE DEVELOPING SURFACE LOW OF A VIGOROUS FRONTAL SYSTEM MOVED ONSHORE NEAR ASTORIA AROUND 2 AM AND TRACKED QUICKLY EAST-NORTHEAST ACROSS THE SOUTHERN PART OF WESTERN WASHINGTON EARLY THIS MORNING. THE TRACK OF THE LOW WAS FURTHER SOUTH THAN ORIGINALLY FORECAST...AND AS A RESULT THE WINDS ACROSS WESTERN WASHINGTON WILL NOT BE AS STRONG AS PREVIOUSLY EXPECTED. THE HIGH WIND WARNINGS THAT WERE IN EFFECT FOR THE STRAIT OF JUAN DE FUCA...ADMIRALTY INLET AREA...NORTH AND CENTRAL WASHINGTON COAST ...LOWER CHEHALIS VALLEY...AND SOUTHWEST INTERIOR HAVE BEEN CANCELLED. WINDY CONDITIONS WILL DEVELOP IN THE WAKE OF THE SURFACE LOW AS HIGH PRESSURE BUILDS RAPIDLY INTO WESTERN WASHINGTON...BUT STRONG AND DAMAGING WINDS ARE NO LONGER EXPECTED. WINDS OF 20 TO 35 MPH WITH LOCAL GUSTS OF 50 TO 55 MPH ARE LIKELY IN THE AREAS WHERE A HIGH WIND WARNING WAS IN EFFECT. WAZ504-512-221800- /O.CAN.KSEW.HW.W.0006.000000T0000Z-091122T1800Z/ /O.NEW.KSEW.WI.Y.0024.091122T1231Z-091122T1800Z/ SOUTHWEST INTERIOR-LOWER CHEHALIS VALLEY AREA- 431 AM PST SUN NOV 22 2009 ...WIND ADVISORY IN EFFECT UNTIL 10 AM PST THIS MORNING... ...HIGH WIND WARNING IS CANCELLED... THE NATIONAL WEATHER SERVICE IN SEATTLE HAS ISSUED A WIND ADVISORY...WHICH IS IN EFFECT UNTIL 10 AM PST THIS MORNING. THE HIGH WIND WARNING HAS BEEN CANCELLED. WINDY CONDITIONS WILL PREVAIL ACROSS THE SOUTHWEST INTERIOR AND LOWER CHEHALIS VALLEY THIS MORNING...BUT WINDS WILL NOT BE AS STRONG AS PREVIOUSLY EXPECTED. THUS THE HIGH WIND WARNING HAS BEEN DOWNGRADED TO A WIND ADVISORY. WESTERLY WINDS WILL RISE TO 20 TO 35 MPH THIS MORNING WITH LOCAL GUSTS TO 50 MPH. IT WILL BE A RELATIVELY BRIEF EVENT WITH WINDS EASING BY LATE MORNING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WIND ADVISORY IS ISSUED WHEN SUSTAINED WINDS OF 30 TO 39 MPH OR GUSTS OF 45 TO 57 MPH ARE LIKELY. WINDS THIS STRONG CAN SNAP SMALL TREE BRANCHES...TOPPLE SMALL OR SHALLOW-ROOTED TREES...AND CAUSE LOCAL POWER OUTAGES. && $$ WAZ510-222000- /O.CAN.KSEW.HW.W.0006.000000T0000Z-091122T1800Z/ /O.NEW.KSEW.WI.Y.0024.091122T1231Z-091123T0000Z/ ADMIRALTY INLET AREA- 431 AM PST SUN NOV 22 2009 ...WIND ADVISORY IN EFFECT UNTIL 4 PM PST THIS AFTERNOON... ...HIGH WIND WARNING IS CANCELLED... THE NATIONAL WEATHER SERVICE IN SEATTLE HAS ISSUED A WIND ADVISORY...WHICH IS IN EFFECT UNTIL 4 PM PST THIS AFTERNOON. THE HIGH WIND WARNING HAS BEEN CANCELLED. WINDY CONDITIONS WILL DEVELOP ALONG ADMIRALTY INLET TODAY...BUT WINDS WILL NOT BE AS STRONG AS PREVIOUSLY EXPECTED. THUS THE HIGH WIND WARNING HAS BEEN DOWNGRADED TO A WIND ADVISORY. WINDS WILL SHIFT TO NORTHWEST EARLY THIS MORNING AND RISE TO 20 TO 35 MPH MIDDAY WITH LOCAL GUSTS TO 55 MPH. THE WINDS WILL EASE EARLY THIS EVENING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WIND ADVISORY IS ISSUED WHEN SUSTAINED WINDS OF 30 TO 39 MPH OR GUSTS OF 45 TO 57 MPH ARE LIKELY. WINDS THIS STRONG CAN SNAP SMALL TREE BRANCHES...TOPPLE SMALL OR SHALLOW-ROOTED TREES...AND CAUSE LOCAL POWER OUTAGES. && $$ WAZ514-515-222000- /O.CAN.KSEW.HW.W.0006.000000T0000Z-091122T1800Z/ /O.NEW.KSEW.WI.Y.0024.091122T1231Z-091122T2100Z/ EASTERN STRAIT OF JUAN DE FUCA-WESTERN STRAIT OF JUAN DE FUCA- 431 AM PST SUN NOV 22 2009 ...WIND ADVISORY IN EFFECT UNTIL 1 PM PST THIS AFTERNOON... ...HIGH WIND WARNING IS CANCELLED... THE NATIONAL WEATHER SERVICE IN SEATTLE HAS ISSUED A WIND ADVISORY...WHICH IS IN EFFECT UNTIL 1 PM PST THIS AFTERNOON. THE HIGH WIND WARNING HAS BEEN CANCELLED. WINDY CONDITIONS WILL DEVELOP ALONG THE STRAIT OF JUAN DE FUCA TODAY...BUT WINDS WILL NOT BE AS STRONG AS PREVIOUSLY EXPECTED. THUS THE HIGH WIND WARNING HAS BEEN DOWNGRADED TO A WIND ADVISORY. EASTERLY WINDS IN THE STRAIT OF JUAN DE FUCA WILL SHIFT TO WESTERLY AROUND DAYBREAK AND QUICKLY RISE TO 20 TO 35 MPH WITH LOCAL GUSTS TO 55 MPH. IT WILL BE A RELATIVELY BRIEF EVENT...WITH THE WINDS EASING TO 15 TO 25 MPH DURING THE AFTERNOON. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WIND ADVISORY IS ISSUED WHEN SUSTAINED WINDS OF 30 TO 39 MPH OR GUSTS OF 45 TO 57 MPH ARE LIKELY. WINDS THIS STRONG CAN SNAP SMALL TREE BRANCHES...TOPPLE SMALL OR SHALLOW-ROOTED TREES...AND CAUSE LOCAL POWER OUTAGES. && $$ WAZ516-517-221345- /O.CAN.KSEW.HW.W.0006.000000T0000Z-091122T1800Z/ NORTH COAST-CENTRAL COAST- 431 AM PST SUN NOV 22 2009 ...HIGH WIND WARNING IS CANCELLED... THE NATIONAL WEATHER SERVICE IN SEATTLE HAS CANCELLED THE HIGH WIND WARNING. WINDY CONDITIONS WILL PREVAIL ALONG THE COAST THIS MORNING...BUT WINDS WILL NOT BE AS STRONG AS PREVIOUSLY EXPECTED. THUS THE HIGH WIND WARNING HAS BEEN CANCELLED. EXPECT WEST WINDS OF 20 TO 30 MPH THIS MORNING...EASING DURING THE LATE MORNING AND AFTERNOON. $$ WAZ001-503-505>509-511-221345- /O.CAN.KSEW.WI.Y.0023.000000T0000Z-091122T1800Z/ SAN JUAN COUNTY-WESTERN WHATCOM COUNTY-EAST PUGET SOUND LOWLANDS- WESTERN SKAGIT COUNTY-EVERETT AND VICINITY-SEATTLE/BREMERTON AREA- TACOMA AREA-HOOD CANAL AREA- 431 AM PST SUN NOV 22 2009 ...WIND ADVISORY IS CANCELLED... THE NATIONAL WEATHER SERVICE IN SEATTLE HAS CANCELLED THE WIND ADVISORY. WINDS IN THE PUGET SOUND REGION AND NORTHWEST INTERIOR OF WESTERN WASHINGTON WILL NOT BE AS STRONG AS PREVIOUSLY EXPECTED. THUS THE WIND ADVISORY HAS BEEN CANCELLED. $$ MCDONNAL
What forecasters said that day
The local office's own words before this wind advisory 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 wind advisory went out at Nov 21, 4:33 AM PST, 5 hours 40 minutes earlier.
Area forecast discussion, Nov 21, 4:33 AM PST, 5 hours 40 minutes before
AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE SEATTLE WA
433 AM PST SAT NOV 21 2009
UPDATED THE AVIATION AND MARINE SEGMENTS.
.SYNOPSIS...A WEAK RIDGE WILL MOVE THROUGH WESTERN WASHINGTON THIS
MORNING...FOLLOWED QUICKLY BY A VIGOROUS FRONTAL SYSTEM. THIS SYSTEM
WILL BRING RAIN AND WINDY CONDITIONS TONIGHT AND SUNDAY. HEAVY SNOW
WILL FALL IN THE MOUNTAINS WITH THE SNOW LEVEL REMAINING AT OR BELOW
3000 FEET. A WEAKER FRONT WILL MOVE THROUGH THE AREA MONDAY AND
MONDAY NIGHT...AND ANOTHER WEAK FRONT WILL ARRIVE LATE IN THE WEEK.
&&
.SHORT TERM...WE HAVE NORTHWEST FLOW ALOFT OVER WESTERN WASHINGTON
BETWEEN AN UPPER TROUGH THAT MOVED THROUGH THE AREA OVERNIGHT AND A
WEAK UPPER RIDGE OFFSHORE ALONG 130W. THERE ARE STILL SCATTERED
SHOWERS ACROSS THE FORECAST AREA THIS MORNING...AND A PUGET SOUND
CONVERGENCE ZONE EXTENDING ACROSS ISLAND AND SNOHOMISH COUNTIES. IT
IS STILL BREEZY IN SOME AREAS...BUT THE WIND SHOULD EASE OVER THE
NEXT FEW HOURS AS THE SURFACE HIGH PRESSURE THAT HAS BEEN BUILDING
INTO THE AREA SHIFTS EAST OF THE CASCADES AHEAD OF THE NEXT FRONT.
THE FREEZING LEVEL HAS FALLEN TO AROUND 3000 FT AND TEMPERATURES
ACROSS THE WESTERN WASHINGTON LOWLANDS WERE IN THE UPPER 30S TO MID
40S AT 3 AM.
THE WEAK RIDGE OFFSHORE WILL MOVE QUICKLY ACROSS WESTERN WASHINGTON
THIS MORNING...AND THE CONVERGENCE ZONE WILL LIKELY WEAKEN AND
DISSIPATE. THE SOUTH END OF AN OCCLUDED FRONT SWINGING INTO BRITISH
COLUMBIA WILL QUICKLY FOLLOW THE RIDGE...WITH SIGNIFICANT
PRECIPITATION REACHING THE COAST AND OLYMPICS THIS AFTERNOON. A
FRONTAL WAVE BEGINNING TO DEVELOP NEAR 45N/145W WILL DEEPEN AS IT
MOVES RAPIDLY EASTWARD WITH THE HELP OF A 140 KT JET. IT WILL MOVE
THROUGH THE FORECAST AREA TONIGHT.
HEAVY SNOW IN THE MOUNTAINS LOOKS LIKE A SURE BET. THE SNOW LEVEL
WILL RISE ONLY TO AROUND 3000 FT AS THIS FEATURE MOVES THROUGH...AND
PRECIPITATION AMOUNTS WILL BE IMPRESSIVE. LIQUID AMOUNTS OF 3 TO 4
INCHES IN THE OLYMPICS ARE POSSIBLE THROUGH SUNDAY MORNING --
TRANSLATING ROUGHLY TO 30 TO 40 INCHES OF SNOW. EVEN THE RELATIVELY
DRIER HURRICANE RIDGE AREA SHOULD RECEIVE WINTER STORM WARNING
AMOUNTS...IE 12 INCHES IN 12 HOURS OR 18 INCHES IN 24 HOURS. WATER
EQUIVALENTS IN THE CASCADES WILL LIKELY BE IN THE 1 TO 3 INCH
RANGE...FOR SNOWFALL TOTALS OF 10 INCHES TO 2.5 FT. THE WINTER STORM
WATCH WILL BE UPGRADED TO A WARNING WITH THE EARLY MORNING FORECAST
PACKAGE.
ONE MATTER THAT IS SOMEWHAT UNCERTAIN IS THE TRACK OF THE SURFACE
LOW. THE MOST LIKELY SCENARIO IS THAT IT WILL REACH THE CENTRAL
WASHINGTON COAST AROUND MIDNIGHT TONIGHT...TRACK NORTHEAST ACROSS
THE OLYMPIC PENINSULA AND THE NORTH PART OF THE PUGET SOUND REGION
TO AROUND MT BAKER AT 4 AM...THEN HEAD RAPIDLY INTO BRITISH
COLUMBIA. IT WILL PRODUCE BREEZY TO WINDY CONDITIONS...BUT THERE
APPEARS TO BE LITTLE THREAT OF A WIND STORM.
POST-FRONTAL SHOWERS WILL TAPER OFF SUNDAY AFTERNOON AND EVENING...
AND AN UPPER RIDGE WILL MOVE INLAND SUNDAY NIGHT. THE RIDGE WILL
QUICKLY HEAD EAST OF THE CASCADES MONDAY AND ANOTHER FRONTAL SYSTEM
JUST UPSTREAM OF THE RIDGE WILL ARRIVE. THIS SYSTEM COULD INITIALLY
BRING DECENT PRECIPITATION AMOUNTS TO THE COAST AND OLYMPIC
PENINSULA MONDAY AFTERNOON...BUT IT WILL WEAKEN AS IT MOVES INLAND
MONDAY NIGHT. BY RECENT STANDARDS THIS WILL BE AN UNEVENTFUL SYSTEM
AND IT WILL MARK THE BEGINNING OF A PERIOD OF QUIETER...THOUGH NOT
NECESSARILY DRY...WEATHER. MCDONNAL
.LONG TERM...A WEAK UPPER RIDGE WILL FOLLOW THE FRONT THAT MOVES
THROUGH MONDAY AND MONDAY NIGHT. THERE IS JUST A CHANCE OF RAIN IN
THE FORECAST FOR TUESDAY AND WEDNESDAY...WITH A FAIRLY GOOD CHANCE
FOR SOME DRY WEATHER OVER THOSE TWO DAYS. A WEAK FRONT WILL SLOWLY
MOVE ACROSS WESTERN WASHINGTON WEDNESDAY NIGHT AND THURSDAY. ANOTHER
FRONTAL WAVE WILL PROBABLY KEEP THE AREA WET THURSDAY NIGHT AND
FRIDAY...THOUGH DISAGREEMENT BETWEEN MODELS DROPS OFF CONSIDERABLY
BY LATE IN THE WEEK. MCDONNAL
&&
.HYDROLOGY...THE SYSTEM COMING IN TODAY THROUGH MIDDAY SUNDAY ...
WHILE IT WILL PRODUCE IMPRESSIVE AMOUNTS OF PRECIPITATION...WILL
HAVE MINIMAL EFFECT ON RIVERS EXCEPT POSSIBLY FOR THE TWO RIVERS
THAT ARE ALREADY CLOSE TO OR ABOVE FLOOD STAGE -- THE SKOKOMISH AND
THE LOWER REACH OF THE CHEHALIS IN GRAYS HARBOR COUNTY. WITH THE
SNOW LEVEL ONLY RISING TO AROUND 3000 FT...IT WILL BE A MOUNTAIN
SNOW PRODUCER NOT A FLOODING RAIN PRODUCER.
THE SKOKOMISH RIVER IS FORECAST TO FALL BELOW FLOOD STAGE ABOUT NOON
TODAY. THERE WILL BE A PLANNED RELEASE OF 3000 CFS FROM CUSHMAN DAM
#2 INTO THE NORTH FORK SKOKOMISH RIVER TODAY. THIS RELEASE WILL KEEP
THE SKOKOMISH RIVER RUNNING HIGH. THE FORECAST CALLS FOR THE RIVER
TO REMAIN JUST BELOW FLOOD STAGE TONIGHT AND SUNDAY.
A FLOOD WATCH REMAINS IN EFFECT FOR THE LOWER REACH OF THE CHEHALIS
RIVER IN GRAYS HARBOR COUNTY...WHICH HAS BEEN WITHIN A FOOT OF FLOOD
STAGE FOR THE PAST TWO DAYS. IT IS CONCEIVABLE THAT THE
PRECIPITATION FROM THE INCOMING SYSTEM COULD HELP FINALLY NUDGE THE
LOWER CHEHALIS ABOVE FLOOD STAGE. IF FLOODING DOES OCCUR IT WILL BE
MINOR.
THE NEXT SYSTEM ON MONDAY SHOULD MOVE THROUGH QUICKLY AND BE TOO
WEAK TO CAUSE ANY FLOODING...EVEN WITH RISING SNOW LEVELS. FOR THE
REMAINDER OF THE WEEK...THE AIR MASS OVER THE NORTHWEST WILL BE
WARMER WITH HIGHER SNOW LEVELS...HOWEVER THE SYSTEMS THAT ARE
EXPECTED TO AFFECT THE AREA WILL BE FAIRLY WEAK AND ARE NOT EXPECTED
TO CAUSE ANY ADDITIONAL FLOODING CONCERNS.
NO FLOODING IS EXPECTED AT ANY TIME ON THE GREEN RIVER. MCDONNAL
&&
.AVIATION...A WEAK...UPPER RIDGE OVER THE REGION WILL MOVE E
TONIGHT...ALLOWING A STRONG...UPPER TROF TO MOVE OVER THE AREA.
INCREASING WLY FLOW ALOFT...SUBSIDING AND BECOMING NW LATE TONIGHT.
AT THE SFC...A FRONTAL SYSTEM OVER THE ERN PAC WILL RAPIDLY APPROACH
WRN WA DURING THE DAY TODAY...RESULTING IN INCREASED SLY WINDS. THE
OCCLUDED FRONT WILL MOVE ACROSS THE AREA THIS EVENING. A SECONDARY
SFC LOW IS ANTICIPATED TO DEVELOP OFF THE FAR SW WA OR FAR NW OREGON
COAST THIS EVENING...AND TRACK NEWD ACROSS THE AREA LATER TONIGHT.
THUS EXPECT THE WINDS TO BACK BEHIND THE OCCLUDED FRONT THIS
EVENING...AND THIS SHOULD RAISE THE POTENTIAL FOR LLWS SINCE WINDS
ABOVE THE SFC WILL REMAIN SLY. WINDS WILL PICK UP DRAMATICALLY FROM
THE W OR SW LATE TONIGHT OR EARLY SUNDAY ONCE THE SFC LOW MOVES E OF
THE AREA.
MEANWHILE...A PUGET SOUND CONVERGENCE ZONE /PSCZ/ WAS ROUGHLY
LOCATED BETWEEN KPAE AND KAWO AT THIS TIME. THIS FEATURE SHOULD
DRIFT N AND DISSIPATE BY MIDMORNING AS ITS SUPPORT WANES.
KSEA...WINDS WILL REMAIN SLY TODAY...BECOMING MORE ELY TONIGHT.
THERE WILL BE A POTENTIAL FOR LLWS BETWEEN 0000 AND 1200 UTC SUNDAY
DUE TO ELY WINDS AT THE SFC AND STRONG SLY WINDS NEAR 2K FT. HAVE
HELD OFF ON MENTIONING THIS IN THE TAF TIL WE SEE ANOTHER MODEL RUN.
THE CURRENT MODEL SOLUTIONS WERE QUITE DIFFERENT THAN THE PREVIOUS
RUN DUE TO A MORE VIGOROUS SYSTEM NOW EXPECTED TO AFFECT THE AREA.
WINDS WILL INCREASE DRAMATICALLY FROM THE SW SOMETIME BETWEEN 1000
UTC AND 1200 UTC SUNDAY. CONCERNING CIGS...ANTICIPATE CIGS TO
GRADUALLY LOWER DURING THE DAY...ALTHOUGH THERE WILL BE OCCASIONAL
CIGS NEAR 2500 FT THIS MORNING. BY LATE THIS EVENING...CIGS SHOULD
BE NEAR 2K FT...WITH RAIN AND FOG REDUCING VSBYS INTO THE 3-5SM
RANGE.
&&
.MARINE...THERE WAS A SIGNIFICANT CHANGE IN THE FORECAST FROM THE
PREVIOUS ONE DUE TO A MORE VIGOROUS SYSTEM EXPECTED TO AFFECT THE
AREA TODAY. SLY WINDS ARE STILL ANTICIPATED TO INCREASE DURING THE
DAY...AHEAD OF A FAST-MOVING FRONTAL SYSTEM STILL WELL OFFSHORE...
FOR GALE OR SMALL CRAFT ADVISORY WIND SPEEDS. THE OCCLUDED FRONT
WILL SWEEP ACROSS THE AREA THIS EVENING. DUE TO SOMEWHAT LOW
CONFIDENCE HAVE WENT WITH A SMALL CRAFT ADVISORY FOR THE NORTHERN
INLAND WATERS AND EAST ENTRANCE TO THE STRAIT OF JUAN DE FUCA TODAY
INSTEAD OF UPGRADING THE PREVIOUS GALE WATCH TO A WARNING.
ANOTHER SURFACE WAVE OR LOW IS EXPECTED TO DEVELOP OFF THE FAR SW
WASHINGTON OR FAR NW OREGON COAST TONIGHT...AND THIS WILL CAUSE THE
WINDS TO BACK AND DROP OFF...ESPECIALLY ACROSS THE INLAND WATERS.
THE LOW WILL MOVE NE ACROSS INTERIOR WESTERN WASHINGTON OVERNIGHT.
WINDS WILL KICK BACK UP LATE TONIGHT OR EARLY SUNDAY IN RESPONSE TO
STRONG ONSHORE OR WESTERLY FLOW DEVELOPING. CONFIDENCE WAS FAIRLY
HIGH THAT GALE FORCE WINDS WILL DEVELOP OVER THE STRAIT OF JUAN DE
FUCA EARLY SUNDAY...THUS HAVE ISSUED A GALE WATCH FOR THE CENTRAL
AND EASTERN STRAIT. THERE IS A POSSIBILITY THAT WINDS MAY BRIEFLY
REACH STORM FORCE...NEAR 50 KNOTS...OVER THE CENTRAL STRAIT SUNDAY
MORNING WITH THE INITIAL PUSH.
ANTICIPATE THE ONSHORE FLOW TO WEAKEN AND BECOME SOUTHERLY SUNDAY
NIGHT. THE NEXT FRONTAL SYSTEM WILL AFFECT THE WATERS ON MON.
&&
.SEW WATCHES/WARNINGS/ADVISORIES...
WA...FLOOD WARNINGS AND/OR FLOOD WATCHES REMAIN IN EFFECT FOR A
PORTION OF THE CWA.
A WINTER STORM WARNING IS IN EFFECT FOR THE OLYMPICS AND
CASCADES FROM THIS AFTERNOON THROUGH SUNDAY MORNING.
PZ...A GALE WARNING REMAINS IN EFFECT FOR THE COASTAL WATERS AND
WEST ENTRANCE TO THE STRAIT OF JUAN DE FUCA THROUGH THIS
EVENING.
A SMALL CRAFT ADVISORY IS IN EFFECT FOR THE REMAINING
WATERS.
A SMALL CRAFT ADVISORY FOR ROUGH GRAYS HARBOR BAR CONDITIONS
IS IN EFFECT TIL NOON MON.
WWW.WEATHER.GOV/SEATTLE
FOR AN ILLUSTRATED VERSION OF THE FORECAST DISCUSSION...PLEASE SEE
WWW.WEATHER.GOV/SEATTLE/GAFD/LATESTWEBAFD.HTML.The office that day
Everything else NWS Seattle, WA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 20, 8:14 PM PST | Gale Watch | SEW | 7 hr | |
| Nov 20, 8:14 PM PST | Gale Warning | SEW | 49 hr | |
| Nov 20, 9:15 PM PST | Winter Storm Watch | SEW | 7 hr | |
| Nov 21, 3:33 AM PST | Gale Watch | SEW | 11 hr | |
| Nov 21, 3:33 AM PST | Small Craft Advisory for Winds | SEW | 17 hr | |
| Nov 21, 4:30 AM PST | Winter Storm Warning | SEW | 41 hr | |
| Nov 21, 10:13 AM PST | High Wind Watch | SEW | 6 hr | |
| Nov 21, 3:08 PM PST | High Wind Warning | SEW | San Juan | 13 hr |
Nearby
Wind Advisories in Washington, 2009Every wind advisory in 2009
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.