Alert archive / Washington / Wind Chill Warnings in 2021
Wind Chill Warning 1, NWS Seattle, WA
NWS Seattle, WA issued this wind chill warning at Dec 26, 2021, 6:27 PM PST for San Juan County, Washington. It took effect at Dec 26, 2021, 7:00 PM PST. It was in force for 15 hr. 7 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Dec 26, 2021, 6:27 PM PST (02:27 UTC)
- In effect from
- Dec 26, 2021, 7:00 PM PST
- Expired
- Dec 27, 2021, 10:00 AM PST
- In force
- 15 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 02:27 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Dec 27, 7:00 AM PST | SNOW 2.5 | 4 Sse Roche Harbor, WA | COCORAHS STATION WA-SJ-10 FRIDAY HARBOR 4.6 WNW. |
| Dec 27, 7:00 AM PST | SNOW 2.5 | 6 E Friday Harbor, WA | COCORAHS STATION WA-SJ-28 LOPEZ ISLAND 3.9 NNE. |
| Dec 27, 7:00 AM PST | SNOW 2.5 | 6 Se Friday Harbor, WA | COCORAHS STATION WA-SJ-47 LOPEZ ISLAND 3.7 S. |
| Dec 27, 7:00 AM PST | SNOW 4 | 6 Ese Friday Harbor, WA | COCORAHS STATION WA-SJ-44 LOPEZ ISLAND 1.2 SW. |
| Dec 27, 8:00 AM PST | SNOW 2 | 4 Ssw Friday Harbor, WA | COCORAHS STATION WA-SJ-16 FRIDAY HARBOR 4.0 SSW. |
| Dec 27, 8:00 AM PST | SNOW 3.5 | 2 Ssw Friday Harbor, WA | COCORAHS STATION WA-SJ-51 FRIDAY HARBOR 2.2 SSW. |
| Dec 27, 8:00 AM PST | SNOW 3.8 | 3 Wnw Friday Harbor, WA | COCORAHS STATION WA-SJ-40 FRIDAY HARBOR 2.6 WNW. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Quillayute State, WA (KUIL), launched 00:00Z, 2.5 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
- 916 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 71 m²/s²
- 0-3 km storm-relative helicity
- 123 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
180 WWUS46 KSEW 270227 WSWSEW URGENT - WINTER WEATHER MESSAGE National Weather Service Seattle WA 627 PM PST Sun Dec 26 2021 WAZ001-503-271030- /O.UPG.KSEW.WC.Y.0001.000000T0000Z-211227T1800Z/ /O.NEW.KSEW.WC.W.0001.211227T0300Z-211227T1800Z/ San Juan County-Western Whatcom County- including Friday Harbor, Eastsound, Bellingham, Blaine, Point Roberts, Ferndale, Lynden, Sumas, and Sudden Valley 627 PM PST Sun Dec 26 2021 ...WIND CHILL WARNING IN EFFECT UNTIL 10 AM PST MONDAY... * WHAT...Dangerously cold wind chills expected. Wind chills as low as 25 below zero. * WHERE...San Juan County, including Stuart Island, Waldron Island, Orcas Island, San Juan Island, Lopez Island, Blakely Island, and Decatur Island and Lowlands of western Whatcom County, including Point Roberts, Lummi Island, Bellingham, and Sumas. * WHEN...Until 10 AM PST Monday. * IMPACTS...The cold wind chills could cause frostbite on exposed skin in as little as 30 minutes. PRECAUTIONARY/PREPAREDNESS ACTIONS... Avoid outside activities if possible. When outside, make sure you wear appropriate clothing, a hat, and gloves. && $$ WAZ510-514-271030- /O.CON.KSEW.WC.Y.0001.000000T0000Z-211227T1800Z/ /O.CON.KSEW.WW.Y.0039.000000T0000Z-211227T1200Z/ Admiralty Inlet Area-Eastern Strait of Juan de Fuca- including Port Townsend, Oak Harbor, Coupeville, Langley, Sequim, and Port Angeles 627 PM PST Sun Dec 26 2021 ...WIND CHILL ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST MONDAY... ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 AM PST MONDAY... * WHAT...For the Winter Weather Advisory, snow continued. Additional snow accumulations of up to two inches. For the Wind Chill Advisory, very cold wind chills continued. Wind chills as low as 5 below zero. * WHERE...Admiralty Inlet Area, including Port Townsend, Whidbey Island, and Camano Island and Eastern Strait of Juan de Fuca lowlands, including Port Angeles, Sequim, and Blyn. * WHEN...For the Winter Weather Advisory, until 4 AM PST Monday. For the Wind Chill Advisory, until 10 AM PST Monday. * IMPACTS...Plan on slippery road conditions. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves. For the latest road conditions in Washington state, call 5 1 1. && $$ WAZ515-271030- /O.CON.KSEW.WW.Y.0039.000000T0000Z-211227T1200Z/ Western Strait of Juan De Fuca- including Clallam Bay, Joyce, and Sekiu 627 PM PST Sun Dec 26 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 AM PST MONDAY... * WHAT...Snow continued. Additional snow accumulations of up to two inches. * WHERE...Western Strait of Juan de Fuca lowlands, including Sekiu, Clallam Bay, and Joyce. * WHEN...Until 4 AM PST Monday. * IMPACTS...Plan on slippery road conditions. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. For the latest road conditions in Washington state, call 5 1 1. && $$ http://www.weather.gov/seattle
3 follow-up statements
908 WWUS46 KSEW 270310 WSWSEW URGENT - WINTER WEATHER MESSAGE National Weather Service Seattle WA 710 PM PST Sun Dec 26 2021 WAZ001-503-271115- /O.CON.KSEW.WC.W.0001.000000T0000Z-211227T1800Z/ San Juan County-Western Whatcom County- including Friday Harbor, Eastsound, Bellingham, Blaine, Point Roberts, Ferndale, Lynden, Sumas, and Sudden Valley 710 PM PST Sun Dec 26 2021 ...WIND CHILL WARNING REMAINS IN EFFECT UNTIL 10 AM PST MONDAY... * WHAT...Dangerously cold wind chills continued. Wind chills as low as 20 below zero. * WHERE...San Juan County, including Stuart Island, Waldron Island, Orcas Island, San Juan Island, Lopez Island, Blakely Island, and Decatur Island and Lowlands of western Whatcom County, including Point Roberts, Lummi Island, Bellingham, and Sumas. * WHEN...Until 10 AM PST Monday. * IMPACTS...The cold wind chills could cause frostbite on exposed skin in as little as 30 minutes. PRECAUTIONARY/PREPAREDNESS ACTIONS... Avoid outside activities if possible. When outside, make sure you wear appropriate clothing, a hat, and gloves. && $$ WAZ504-512-517-271115- /O.EXB.KSEW.WW.Y.0039.000000T0000Z-211227T1400Z/ Southwest Interior-Lower Chehalis Valley Area-Central Coast- including Lacey, Olympia, Tumwater, Yelm, Grand Mound, Rochester, Centralia, Toledo, Montesano, Elma, McCleary, Aberdeen, Hoquiam, Westport, Ocean Shores, and Humptulips 710 PM PST Sun Dec 26 2021 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL 6 AM PST MONDAY... * WHAT...Snow continued. Additional snow accumulations of up to two inches. * WHERE...Lowlands of Thurston, western Lewis, and far southeast Mason Counties, including Harstine Island, Olympia, Centralia, and Toledo, Far southwest Mason County and the interior lowlands of Grays Harbor County, including Matlock, McCleary, and Montesano and Central coast, including Pacific Beach, Aberdeen, and Westport. * WHEN...Until 6 AM PST Monday. * IMPACTS...Plan on slippery road conditions. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. For the latest road conditions in Washington state, call 5 1 1. && $$ WAZ510-514-271115- /O.CON.KSEW.WC.Y.0001.000000T0000Z-211227T1800Z/ /O.CON.KSEW.WW.Y.0039.000000T0000Z-211227T1200Z/ Admiralty Inlet Area-Eastern Strait of Juan de Fuca- including Port Townsend, Oak Harbor, Coupeville, Langley, Sequim, and Port Angeles 710 PM PST Sun Dec 26 2021 ...WIND CHILL ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST MONDAY... ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 AM PST MONDAY... * WHAT...For the Winter Weather Advisory, snow continued. Additional snow accumulations of up to one inch. For the Wind Chill Advisory, very cold wind chills continued. Wind chills as low as 5 below zero. * WHERE...Eastern Strait of Juan de Fuca lowlands, including Port Angeles, Sequim, and Blyn and Admiralty Inlet Area, including Port Townsend, Whidbey Island, and Camano Island. * WHEN...For the Winter Weather Advisory, until 4 AM PST Monday. For the Wind Chill Advisory, until 10 AM PST Monday. * IMPACTS...Plan on slippery road conditions. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves. For the latest road conditions in Washington state, call 5 1 1. && $$ WAZ515-271115- /O.CON.KSEW.WW.Y.0039.000000T0000Z-211227T1200Z/ Western Strait of Juan De Fuca- including Clallam Bay, Joyce, and Sekiu 710 PM PST Sun Dec 26 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 AM PST MONDAY... * WHAT...Snow continued. Additional snow accumulations of up to one inch. * WHERE...Western Strait of Juan de Fuca lowlands, including Sekiu, Clallam Bay, and Joyce. * WHEN...Until 4 AM PST Monday. * IMPACTS...Plan on slippery road conditions. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. For the latest road conditions in Washington state, call 5 1 1. && $$ http://www.weather.gov/seattle
979 WWUS46 KSEW 271058 WSWSEW URGENT - WINTER WEATHER MESSAGE National Weather Service Seattle WA 258 AM PST Mon Dec 27 2021 WAZ515-271200- /O.CAN.KSEW.WW.Y.0039.000000T0000Z-211227T1200Z/ Western Strait of Juan De Fuca- 258 AM PST Mon Dec 27 2021 ...WINTER WEATHER ADVISORY IS CANCELLED... $$ WAZ001-503-271800- /O.CON.KSEW.WC.W.0001.000000T0000Z-211227T1800Z/ San Juan County-Western Whatcom County- including Friday Harbor, Eastsound, Bellingham, Blaine, Point Roberts, Ferndale, Lynden, Sumas, and Sudden Valley 258 AM PST Mon Dec 27 2021 ...WIND CHILL WARNING REMAINS IN EFFECT UNTIL 10 AM PST THIS MORNING... * WHAT...Dangerously cold wind chills continued. Wind chills as low as 20 below zero. * WHERE...San Juan County, including Stuart Island, Waldron Island, Orcas Island, San Juan Island, Lopez Island, Blakely Island, and Decatur Island and Lowlands of western Whatcom County, including Point Roberts, Lummi Island, Bellingham, and Sumas. * WHEN...Until 10 AM PST this morning. * IMPACTS...The cold wind chills could result in hypothermia if precautions are not taken. PRECAUTIONARY/PREPAREDNESS ACTIONS... Avoid outside activities if possible. When outside, make sure you wear appropriate clothing, a hat, and gloves. && $$ WAZ510-514-271800- /O.CON.KSEW.WC.Y.0001.000000T0000Z-211227T1800Z/ /O.CON.KSEW.WW.Y.0039.000000T0000Z-211227T1200Z/ Admiralty Inlet Area-Eastern Strait of Juan de Fuca- including Port Townsend, Oak Harbor, Coupeville, Langley, Sequim, and Port Angeles 258 AM PST Mon Dec 27 2021 ...WIND CHILL ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST THIS MORNING... ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 AM PST EARLY THIS MORNING... * WHAT...For the Winter Weather Advisory, snow showers continued. Additional snow accumulations of up to an inch. For the Wind Chill Advisory, very cold wind chills continued. Wind chills as low as 5 below zero. * WHERE...Eastern Strait of Juan de Fuca lowlands, including Port Angeles, Sequim, and Blyn and Admiralty Inlet Area, including Port Townsend, Whidbey Island, and Camano Island. * WHEN...For the Winter Weather Advisory, until 4 AM PST early this morning. For the Wind Chill Advisory, until 10 AM PST this morning. * IMPACTS...Plan on slippery road conditions. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves. For the latest road conditions in Washington state, call 5 1 1. && $$ WAZ504-512-517-271400- /O.CON.KSEW.WW.Y.0039.000000T0000Z-211227T1400Z/ Southwest Interior-Lower Chehalis Valley Area-Central Coast- including Lacey, Olympia, Tumwater, Yelm, Grand Mound, Rochester, Centralia, Toledo, Montesano, Elma, McCleary, Aberdeen, Hoquiam, Westport, Ocean Shores, and Humptulips 258 AM PST Mon Dec 27 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 AM PST EARLY THIS MORNING... * WHAT...Snow continued. Additional snow accumulations of up to one inch. * WHERE...Far southwest Mason County and the interior lowlands of Grays Harbor County, including Matlock, McCleary, and Montesano, Central coast, including Pacific Beach, Aberdeen, and Westport and Lowlands of Thurston, western Lewis, and far southeast Mason Counties, including Harstine Island, Olympia, Centralia, and Toledo. * WHEN...Until 6 AM PST early this morning. * IMPACTS...Plan on slippery road conditions. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. For the latest road conditions in Washington state, call 5 1 1. && $$ http://www.weather.gov/seattle
781 WWUS46 KSEW 271401 WSWSEW URGENT - WINTER WEATHER MESSAGE National Weather Service Seattle WA 601 AM PST Mon Dec 27 2021 WAZ504-512-517-271515- /O.EXP.KSEW.WW.Y.0039.000000T0000Z-211227T1400Z/ Southwest Interior-Lower Chehalis Valley Area-Central Coast- including Lacey, Olympia, Tumwater, Yelm, Grand Mound, Rochester, Centralia, Toledo, Montesano, Elma, McCleary, Aberdeen, Hoquiam, Westport, Ocean Shores, and Humptulips 601 AM PST Mon Dec 27 2021 ...WINTER WEATHER ADVISORY WILL EXPIRE AT 6 AM PST EARLY THIS MORNING... Snow showers have tapered and mostly ended. No additional accumulations are expected this morning. $$ WAZ001-503-271800- /O.CON.KSEW.WC.W.0001.000000T0000Z-211227T1800Z/ San Juan County-Western Whatcom County- including Friday Harbor, Eastsound, Bellingham, Blaine, Point Roberts, Ferndale, Lynden, Sumas, and Sudden Valley 601 AM PST Mon Dec 27 2021 ...WIND CHILL WARNING REMAINS IN EFFECT UNTIL 10 AM PST THIS MORNING... * WHAT...Dangerously cold wind chills continued. Wind chills as low as 20 below zero. * WHERE...San Juan County, including Stuart Island, Waldron Island, Orcas Island, San Juan Island, Lopez Island, Blakely Island, and Decatur Island and Lowlands of western Whatcom County, including Point Roberts, Lummi Island, Bellingham, and Sumas. * WHEN...Until 10 AM PST this morning. * IMPACTS...The cold wind chills could result in hypothermia if precautions are not taken. PRECAUTIONARY/PREPAREDNESS ACTIONS... Avoid outside activities if possible. When outside, make sure you wear appropriate clothing, a hat, and gloves. && $$ WAZ510-514-271800- /O.CON.KSEW.WC.Y.0001.000000T0000Z-211227T1800Z/ Admiralty Inlet Area-Eastern Strait of Juan de Fuca- including Port Townsend, Oak Harbor, Coupeville, Langley, Sequim, and Port Angeles 601 AM PST Mon Dec 27 2021 ...WIND CHILL ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST THIS MORNING... * WHAT...Very cold wind chills continued. Wind chills as low as 5 below zero. * WHERE...Eastern Strait of Juan de Fuca lowlands, including Port Angeles, Sequim, and Blyn and Admiralty Inlet Area, including Port Townsend, Whidbey Island, and Camano Island. * WHEN...Until 10 AM PST this morning. * IMPACTS...Frost bite and hypothermia are possible if precautions are not taken. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves. && $$ http://www.weather.gov/seattle
The office that day
Everything else NWS Seattle, WA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 26, 6:28 PM PST | High Wind Warning | SEW | 16 hr | |
| Dec 27, 2:59 PM PST | Small Craft Advisory | SEW | 16 hr |
Nearby
Wind Chill Warnings in Washington, 2021Every wind chill warning in 2021
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.