Alert archive / Minnesota / Winter Storm Warnings in 2021
Winter Storm Warning 4, NWS Duluth, MN
NWS Duluth, MN issued this winter storm warning at Nov 11, 2021, 3:45 AM CST for Koochiching County, Minnesota. It took effect at Nov 11, 2021, 12:00 PM CST. It was in force for 15 hr. 1 report 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
- Nov 11, 2021, 3:45 AM CST (09:45 UTC)
- In effect from
- Nov 11, 2021, 12:00 PM CST
- Expired
- Nov 12, 2021, 2:51 AM CST
- In force
- 15 hr
- Issued by
- NWS Duluth, MN
County Koochiching County, MN
The radar
The Duluth radar (KDLH), 196 km from the middle of the area, began a volume at 09:47 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 |
|---|---|---|---|
| Nov 12, 12:07 AM CST | SNOW 4.5 | 1 Ese International Fal, MN |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
International Fa, MN (KINL), launched 00:00Z, 9.8 hours before the alert went out and 51 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
- 1087 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 390 m²/s²
- 0-3 km storm-relative helicity
- 745 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
864 WWUS43 KDLH 110945 WSWDLH URGENT - WINTER WEATHER MESSAGE National Weather Service Duluth MN 345 AM CST Thu Nov 11 2021 MNZ010-112145- /O.UPG.KDLH.WS.A.0004.211111T1800Z-211112T1800Z/ /O.NEW.KDLH.WS.W.0004.211111T1800Z-211112T1800Z/ Koochiching- Including the city of International Falls 345 AM CST Thu Nov 11 2021 ...WINTER STORM WARNING IN EFFECT FROM NOON TODAY TO NOON CST FRIDAY... * WHAT...Heavy snow expected. Total snow accumulations of 5 to 8 inches. * WHERE...Koochiching County. This includes the Tribal Lands of the Bois Forte Band, Nett Lake area. * WHEN...From noon today to noon CST Friday. * IMPACTS...Travel could be very difficult. The hazardous conditions could impact the morning or evening commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions can be obtained by calling 5 1 1. Road conditions can also be found at 511mn.org for Minnesota or 511wi.gov for Wisconsin. && $$ MNZ011-018-112145- /O.UPG.KDLH.WS.A.0004.211111T1800Z-211112T1800Z/ /O.NEW.KDLH.WW.Y.0014.211111T1800Z-211112T1800Z/ North St. Louis-North Itasca- Including the cities of Ely and Bigfork 345 AM CST Thu Nov 11 2021 ...WINTER WEATHER ADVISORY IN EFFECT FROM NOON TODAY TO NOON CST FRIDAY... * WHAT...Snow expected. Total snow accumulations of 3 to 5 inches. * WHERE...North St. Louis and North Itasca Counties. This includes the Tribal Lands of the Bois Forte Band, Deer Creek and, Nett Lake areas. * WHEN...From noon today to noon CST Friday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the morning or evening commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions can be obtained by calling 5 1 1. Road conditions can also be found at 511mn.org for Minnesota or 511wi.gov for Wisconsin. && $$ MNZ025-112145- /O.NEW.KDLH.WW.Y.0014.211111T1800Z-211112T1800Z/ North Cass- Including the city of Walker 345 AM CST Thu Nov 11 2021 ...WINTER WEATHER ADVISORY IN EFFECT FROM NOON TODAY TO NOON CST FRIDAY... * WHAT...Snow expected. Total snow accumulations of 3 to 5 inches. * WHERE...North Cass County. * WHEN...From noon today to noon CST Friday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the morning or evening commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions can be obtained by calling 5 1 1. Road conditions can also be found at 511mn.org for Minnesota or 511wi.gov for Wisconsin. && $$ MNZ033-112145- /O.NEW.KDLH.WW.Y.0014.211112T0000Z-211112T1800Z/ South Cass- Including the city of Pine River 345 AM CST Thu Nov 11 2021 ...WINTER WEATHER ADVISORY IN EFFECT FROM 6 PM THIS EVENING TO NOON CST FRIDAY... * WHAT...Snow expected. Total snow accumulations of 3 to 5 inches. * WHERE...South Cass County. * WHEN...From 6 PM this evening to noon CST Friday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the morning commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions can be obtained by calling 5 1 1. Road conditions can also be found at 511mn.org for Minnesota or 511wi.gov for Wisconsin. && $$ For more information from the National Weather Service visit http://weather.gov/Duluth
4 follow-up statements
235 WWUS43 KDLH 112130 WSWDLH URGENT - WINTER WEATHER MESSAGE National Weather Service Duluth MN 330 PM CST Thu Nov 11 2021 MNZ010-120930- /O.CON.KDLH.WS.W.0004.000000T0000Z-211112T1800Z/ Koochiching- Including the city of International Falls 330 PM CST Thu Nov 11 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON CST FRIDAY... * WHAT...Heavy snow. Additional snow accumulations of 4 to 6 inches. * WHERE...Koochiching County. This includes the Tribal Lands of the Bois Forte Band, Nett Lake area. * WHEN...Until noon CST Friday. * IMPACTS...Travel could be very difficult. The hazardous conditions could impact the morning or evening commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions can be obtained by calling 5 1 1. Road conditions can also be found at 511mn.org for Minnesota or 511wi.gov for Wisconsin. && $$ MNZ011-018-025-120930- /O.CON.KDLH.WW.Y.0014.000000T0000Z-211112T1800Z/ North St. Louis-North Itasca-North Cass- Including the cities of Ely, Bigfork, and Walker 330 PM CST Thu Nov 11 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON CST FRIDAY... * WHAT...Snow. Additional snow accumulations of 2 to 4 inches. * WHERE...North Cass, North Itasca and North St. Louis Counties. This includes the Tribal Lands of the Bois Forte Band, Deer Creek and, Nett Lake areas. * WHEN...Until noon CST Friday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the morning or evening commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions can be obtained by calling 5 1 1. Road conditions can also be found at 511mn.org for Minnesota or 511wi.gov for Wisconsin. && $$ MNZ033-120930- /O.CON.KDLH.WW.Y.0014.211112T0000Z-211112T1800Z/ South Cass- Including the city of Pine River 330 PM CST Thu Nov 11 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON CST FRIDAY... * WHAT...Snow expected. Total snow accumulations of 1 to 3 inches. * WHERE...South Cass County. * WHEN...Until noon CST Friday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the morning commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions can be obtained by calling 5 1 1. Road conditions can also be found at 511mn.org for Minnesota or 511wi.gov for Wisconsin. && $$ For more information from the National Weather Service visit http://weather.gov/Duluth
187 WWUS43 KDLH 120349 WSWDLH URGENT - WINTER WEATHER MESSAGE National Weather Service Duluth MN 949 PM CST Thu Nov 11 2021 MNZ010-121600- /O.CON.KDLH.WS.W.0004.000000T0000Z-211112T1800Z/ Koochiching- Including the city of International Falls 949 PM CST Thu Nov 11 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON CST FRIDAY... * WHAT...Heavy snow. Additional snow accumulations of 1 to 3 inches. * WHERE...Koochiching County. This includes the Tribal Lands of the Bois Forte Band, Nett Lake area. * WHEN...Until noon CST Friday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the morning commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions can be obtained by calling 5 1 1. Road conditions can also be found at 511mn.org for Minnesota or 511wi.gov for Wisconsin. && $$ MNZ019-026-121600- /O.EXA.KDLH.WW.Y.0014.000000T0000Z-211112T1800Z/ Central St. Louis-South Itasca- Including the cities of Hibbing and Grand Rapids 949 PM CST Thu Nov 11 2021 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL NOON CST FRIDAY... * WHAT...Snow. Additional snow accumulations of up to two inches. * WHERE...Central St. Louis and South Itasca Counties. This includes the Tribal Lands of the Bois Forte Band, Lake Vermilion area. * WHEN...Until noon CST Friday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the morning commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions can be obtained by calling 5 1 1. Road conditions can also be found at 511mn.org for Minnesota or 511wi.gov for Wisconsin. && $$ MNZ011-018-025-033-121600- /O.CON.KDLH.WW.Y.0014.000000T0000Z-211112T1800Z/ North St. Louis-North Itasca-North Cass-South Cass- Including the cities of Ely, Bigfork, Walker, and Pine River 949 PM CST Thu Nov 11 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON CST FRIDAY... * WHAT...Snow. Additional snow accumulations of 1 to 3 inches. * WHERE...North Itasca, South Cass, North St. Louis and North Cass Counties. This includes the Tribal Lands of the Bois Forte Band, Deer Creek and, Nett Lake areas. * WHEN...Until noon CST Friday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the morning commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions can be obtained by calling 5 1 1. Road conditions can also be found at 511mn.org for Minnesota or 511wi.gov for Wisconsin. && $$ For more information from the National Weather Service visit http://weather.gov/Duluth Huyck
324 WWUS43 KDLH 120354 AAA WSWDLH URGENT - WINTER WEATHER MESSAGE...UPDATED National Weather Service Duluth MN 954 PM CST Thu Nov 11 2021 MNZ010-121600- /O.CON.KDLH.WS.W.0004.000000T0000Z-211112T1800Z/ Koochiching- Including the city of International Falls 954 PM CST Thu Nov 11 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON CST FRIDAY... * WHAT...Heavy snow and freezing drizzle. Additional snow accumulations of 1 to 3 inches. A thin glaze of ice may develop on surfaces. * WHERE...Koochiching County. This includes the Tribal Lands of the Bois Forte Band, Nett Lake area. * WHEN...Until noon CST Friday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the morning commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions can be obtained by calling 5 1 1. Road conditions can also be found at 511mn.org for Minnesota or 511wi.gov for Wisconsin. && $$ MNZ011-018-019-025-026-033-121600- /O.CON.KDLH.WW.Y.0014.000000T0000Z-211112T1800Z/ North St. Louis-North Itasca-Central St. Louis-North Cass- South Itasca-South Cass- Including the cities of Ely, Bigfork, Hibbing, Walker, Grand Rapids, and Pine River 954 PM CST Thu Nov 11 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON CST FRIDAY... * WHAT...Snow and freezing drizzle. Additional snow accumulations of up to two inches. A thin glaze of ice may develop on surfaces. * WHERE...North Itasca, Central St. Louis, South Cass, North St. Louis, South Itasca and North Cass Counties. This includes the Tribal Lands of the Bois Forte Band, Deer Creek, Lake Vermilion and, Nett Lake areas. * WHEN...Until noon CST Friday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the morning commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions can be obtained by calling 5 1 1. Road conditions can also be found at 511mn.org for Minnesota or 511wi.gov for Wisconsin. && $$ For more information from the National Weather Service visit http://weather.gov/Duluth Huyck
793 WWUS43 KDLH 120851 WSWDLH URGENT - WINTER WEATHER MESSAGE National Weather Service Duluth MN 251 AM CST Fri Nov 12 2021 MNZ010-121800- /O.CAN.KDLH.WS.W.0004.000000T0000Z-211112T1800Z/ /O.EXA.KDLH.WW.Y.0014.000000T0000Z-211112T1800Z/ Koochiching- Including the city of International Falls 251 AM CST Fri Nov 12 2021 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL NOON CST TODAY... ...WINTER STORM WARNING IS CANCELLED... * WHAT...Snow. Additional snow accumulations of up to one inch. * WHERE...Koochiching County. This includes the Tribal Lands of the Bois Forte Band, Nett Lake area. * WHEN...Until noon CST today. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the morning commute. * ADDITIONAL DETAILS...Falling snow and blowing snow may reduce visibilities at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions can be obtained by calling 5 1 1. Road conditions can also be found at 511mn.org for Minnesota or 511wi.gov for Wisconsin. && $$ MNZ011-018-019-025-026-033-121800- /O.CON.KDLH.WW.Y.0014.000000T0000Z-211112T1800Z/ North St. Louis-North Itasca-Central St. Louis-North Cass- South Itasca-South Cass- Including the cities of Ely, Bigfork, Hibbing, Walker, Grand Rapids, and Pine River 251 AM CST Fri Nov 12 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON CST TODAY... * WHAT...Snow. Additional snow accumulations of up to one inch. * WHERE...North Itasca, Central St. Louis, South Cass, North St. Louis, South Itasca and North Cass Counties. This includes the Tribal Lands of the Bois Forte Band, Deer Creek, Lake Vermilion and, Nett Lake areas. * WHEN...Until noon CST today. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the morning commute. * ADDITIONAL DETAILS...Falling snow and blowing snow may reduce visibilities at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions can be obtained by calling 5 1 1. Road conditions can also be found at 511mn.org for Minnesota or 511wi.gov for Wisconsin. && $$ For more information from the National Weather Service visit http://weather.gov/Duluth
The office that day
Everything else NWS Duluth, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 11, 3:45 AM CST | Winter Weather Advisory | DLH | Cass, Itasca, Koochiching, Saint Louis | 32 hr |
Nearby
Winter Storm Warnings in Minnesota, 2021Every winter storm 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.