Alert archive / Minnesota / Winter Storm Warnings in 2021
Winter Storm Warning 7, NWS Duluth, MN
NWS Duluth, MN issued this winter storm warning at Dec 15, 2021, 3:31 PM CST for 4 counties in Minnesota. It took effect at Dec 16, 2021, 12:00 AM CST. It was in force for 12 hr. 10 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 15, 2021, 3:31 PM CST (21:31 UTC)
- In effect from
- Dec 16, 2021, 12:00 AM CST
- Expired
- Dec 16, 2021, 12:00 PM CST
- In force
- 12 hr
- Issued by
- NWS Duluth, MN
Counties Cass County, MN, Itasca County, MN, Koochiching County, MN, Saint Louis County, MN
The radar
The Duluth radar (KDLH), 130 km from the middle of the area, began a volume at 21:33 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 16, 5:00 AM CST | SNOW 1 | Cook, MN | CO-OP OBSERVER STATION COKM5 COOK 8NE. |
| Dec 16, 6:00 AM CST | SNOW 1.5 | 3 E Orr, MN | CO-OP OBSERVER STATION LEIM5 ORR 3 E. |
| Dec 16, 6:00 AM CST | SNOW 3 | 2 Ssw Kabetogama, MN | CO-OP OBSERVER STATION KABM5 KABETOGAMA. |
| Dec 16, 7:00 AM CST | SNOW 1 | 6 Sw Gowan, MN | COCORAHS STATION MN-SL-168 WRIGHT 9.2 NNE. |
| Dec 16, 7:00 AM CST | SNOW 1.1 | 5 Ne Cohasset, MN | COCORAHS STATION MN-IT-17 GRAND RAPIDS 6.1 N. |
| Dec 16, 7:00 AM CST | SNOW 1.2 | Chisholm, MN | COCORAHS STATION MN-SL-15 CHISHOLM 0.4 WSW. |
| Dec 16, 7:00 AM CST | SNOW 1.5 | Coleraine, MN | COCORAHS STATION MN-IT-38 COLERAINE 0.7 S. |
| Dec 16, 7:00 AM CST | SNOW 1.7 | 1 Ssw Kabetogama, MN | COCORAHS STATION MN-SL-171 KABETOGAMA 0.7 SSW. |
| Dec 16, 7:00 AM CST | SNOW 1.9 | 4 Ese Casino, MN | COCORAHS STATION MN-CS-1 PILLAGER 5.1 N. |
| Dec 16, 8:00 AM CST | SNOW 2.3 | 7 Ssw Grand Rapids, MN | COCORAHS STATION MN-IT-7 GRAND RAPIDS 6.2 SSW. |
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 12:00Z, 9.5 hours before the alert went out and 112 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
- 1734 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 228 m²/s²
- 0-3 km storm-relative helicity
- 319 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
720 WWUS43 KDLH 152131 WSWDLH URGENT - WINTER WEATHER MESSAGE National Weather Service Duluth MN 331 PM CST Wed Dec 15 2021 MNZ010-011-018-160945- /O.UPG.KDLH.WW.Y.0021.211216T0600Z-211216T1800Z/ /O.NEW.KDLH.WS.W.0007.211216T0600Z-211216T1800Z/ Koochiching-North St. Louis-North Itasca- Including the cities of International Falls, Ely, and Bigfork 331 PM CST Wed Dec 15 2021 ...WINTER STORM WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO NOON CST THURSDAY... * WHAT...Heavy snow and blowing snow expected, with near-blizzard conditions. Total snow accumulations of 4 to 6 inches. Winds gusting as high as 50 mph. * WHERE...Koochiching, 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 midnight tonight to noon CST Thursday. * IMPACTS...Plan on slippery road conditions. Patchy blowing snow could significantly reduce visibility. The hazardous conditions could impact the Thursday morning commute. Gusty winds could bring down tree branches. * ADDITIONAL DETAILS...Near-blizzard conditions possible tonight due to heavy snow and very strong northwest winds! This could make travel very treacherous at times, particularly during the Thursday 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. && $$ MNZ025-026-033-160945- /O.NEW.KDLH.WS.W.0007.211216T0600Z-211216T1800Z/ North Cass-South Itasca-South Cass- Including the cities of Walker, Grand Rapids, and Pine River 331 PM CST Wed Dec 15 2021 ...WINTER STORM WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO NOON CST THURSDAY... * WHAT...Snow and blowing snow expected, with near-blizzard conditions. Total snow accumulations of 2 to 4 inches. Winds gusting as high as 50 mph. * WHERE...North Cass, South Itasca and South Cass Counties. * WHEN...From midnight tonight to noon CST Thursday. * IMPACTS...Plan on slippery road conditions. Patchy blowing snow could significantly reduce visibility. The hazardous conditions could impact the Thursday morning commute. Strong winds could cause tree damage. * ADDITIONAL DETAILS...Near-blizzard conditions possible tonight due to heavy snow and very strong northwest winds! This could make travel very treacherous at times, particularly during the Thursday morning commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions can be obtained by calling 5 1 1. Road conditions can also be found at 511mn.org for Minnesota or 511wi.gov for Wisconsin. && $$ MNZ012-019>021-034>038-160945- /O.NEW.KDLH.WW.Y.0022.211216T0900Z-211216T1800Z/ Northern Cook and Lake-Central St. Louis-Southern Lake- Southern Cook-Crow Wing-Northern Aitkin-South Aitkin- Carlton and South St. Louis-Pine- Including the cities of Isabella, Hibbing, Two Harbors, Silver Bay, Grand Marais, Brainerd, Hill City, Aitkin, Duluth, Pine City, and Hinckley 331 PM CST Wed Dec 15 2021 ...WINTER WEATHER ADVISORY IN EFFECT FROM 3 AM TO NOON CST THURSDAY... * WHAT...Snow and flash freeze expected. Total snow accumulations of up to two inches. Winds gusting as high as 50 mph. * WHERE...Portions of east central and northeast Minnesota. * WHEN...From 3 AM to noon CST Thursday. * IMPACTS...Plan on slippery road conditions. Patchy blowing snow could significantly reduce visibility. The hazardous conditions could impact the Thursday morning commute. Strong winds could cause tree damage. * ADDITIONAL DETAILS...Much colder air will build into the region tonight through Thursday morning, causing flash freeze conditions. Wet pavement and roadways may become very slick as they freeze over! 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. && $$ For more information from the National Weather Service visit http://weather.gov/Duluth
4 follow-up statements
366 WWUS43 KDLH 160325 WSWDLH URGENT - WINTER WEATHER MESSAGE National Weather Service Duluth MN 925 PM CST Wed Dec 15 2021 MNZ010-011-018-025-026-033-161530- /O.CON.KDLH.WS.W.0007.211216T0600Z-211216T1800Z/ Koochiching-North St. Louis-North Itasca-North Cass-South Itasca- South Cass- Including the cities of International Falls, Ely, Bigfork, Walker, Grand Rapids, and Pine River 925 PM CST Wed Dec 15 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON CST THURSDAY... * WHAT...Heavy snow and blowing snow expected, with near- blizzard conditions. Total snow accumulations of 4 to 6 inches. Winds gusting as high as 50 mph. * WHERE...Koochiching, North St. Louis and North Itasca Counties. This includes the Tribal Lands of the Bois Forte Band, Deer Creek and, Nett Lake areas. * WHEN...From midnight tonight to noon CST Thursday. * IMPACTS...Plan on slippery road conditions. Patchy blowing snow could significantly reduce visibility. The hazardous conditions could impact the Thursday morning commute. Gusty winds could bring down tree branches. * ADDITIONAL DETAILS...Near-blizzard conditions possible tonight due to heavy snow and very strong northwest winds! This could make travel very treacherous at times, particularly during the Thursday morning commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions can be obtained by calling 5 1 1. Road conditions can also be found at 511mn.org for Minnesota or 511wi.gov for Wisconsin. && $$ MNZ012-019>021-034>038-161530- /O.CON.KDLH.WW.Y.0022.211216T0900Z-211216T1800Z/ Northern Cook and Lake-Central St. Louis-Southern Lake- Southern Cook-Crow Wing-Northern Aitkin-South Aitkin- Carlton and South St. Louis-Pine- Including the cities of Isabella, Hibbing, Two Harbors, Silver Bay, Grand Marais, Brainerd, Hill City, Aitkin, Duluth, Pine City, and Hinckley 925 PM CST Wed Dec 15 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 3 AM TO NOON CST THURSDAY... * WHAT...Snow and flash freeze expected. Total snow accumulations of up to two inches. Winds gusting as high as 50 mph. * WHERE...Portions of east central and northeast Minnesota. * WHEN...From 3 AM to noon CST Thursday. * IMPACTS...Plan on slippery road conditions. Patchy blowing snow could significantly reduce visibility. The hazardous conditions could impact the Thursday morning commute. Strong winds could cause tree damage. * ADDITIONAL DETAILS...Much colder air will build into the region tonight through Thursday morning, causing flash freeze conditions. Wet pavement and roadways may become very slick as they freeze over!. 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. && $$ For more information from the National Weather Service visit http://weather.gov/Duluth
328 WWUS43 KDLH 160911 WSWDLH URGENT - WINTER WEATHER MESSAGE National Weather Service Duluth MN 311 AM CST Thu Dec 16 2021 MNZ010-011-018-025-026-033-161800- /O.CON.KDLH.WS.W.0007.000000T0000Z-211216T1800Z/ Koochiching-North St. Louis-North Itasca-North Cass-South Itasca- South Cass- Including the cities of International Falls, Ely, Bigfork, Walker, Grand Rapids, and Pine River 311 AM CST Thu Dec 16 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON CST TODAY... * WHAT...Heavy snow. Additional snow accumulations of 1 to 3 inches. Winds gusting as high as 50 mph. * WHERE...North Itasca, South Cass, Koochiching, North St. Louis, South Itasca and North Cass Counties. This includes the Tribal Lands of the Bois Forte Band, Deer Creek and, Nett Lake areas. * WHEN...Until noon CST today. * IMPACTS...Plan on slippery road conditions. Patchy blowing snow could significantly reduce visibility. The hazardous conditions could impact the morning commute. Gusty winds could bring down tree branches. * ADDITIONAL DETAILS...A flash freeze may occur yet this morning as temperatures drop, causing water on roadways to quickly freeze and make for treacherous travel. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions can be obtained by calling 5 1 1. Road conditions can also be found at 511mn.org for Minnesota or 511wi.gov for Wisconsin. && $$ MNZ012-019>021-034>038-161800- /O.CON.KDLH.WW.Y.0022.000000T0000Z-211216T1800Z/ Northern Cook and Lake-Central St. Louis-Southern Lake- Southern Cook-Crow Wing-Northern Aitkin-South Aitkin- Carlton and South St. Louis-Pine- Including the cities of Isabella, Hibbing, Two Harbors, Silver Bay, Grand Marais, Brainerd, Hill City, Aitkin, Duluth, Pine City, and Hinckley 311 AM CST Thu Dec 16 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON CST TODAY... * WHAT...Snow. Additional snow accumulations of up to two inches. Winds gusting as high as 55 mph. * WHERE...Portions of east central and northeast Minnesota. * WHEN...Until noon CST today. * IMPACTS...Plan on slippery road conditions. Patchy blowing snow could significantly reduce visibility. The hazardous conditions could impact the morning commute. Strong winds could cause tree damage. * ADDITIONAL DETAILS...Much colder air will build into the area this morning, causing flash freeze conditions. Wet pavement and roadways may become very slick as they freeze over! 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. && $$ For more information from the National Weather Service visit http://weather.gov/Duluth
496 WWUS43 KDLH 161712 WSWDLH URGENT - WINTER WEATHER MESSAGE National Weather Service Duluth MN 1112 AM CST Thu Dec 16 2021 MNZ010-011-018-025-026-033-161815- /O.CON.KDLH.WS.W.0007.000000T0000Z-211216T1800Z/ Koochiching-North St. Louis-North Itasca-North Cass-South Itasca- South Cass- Including the cities of International Falls, Ely, Bigfork, Walker, Grand Rapids, and Pine River 1112 AM CST Thu Dec 16 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON CST TODAY... * WHAT...Heavy snow. Additional snow accumulations of up to one inch. Winds gusting as high as 35 mph. * WHERE...North Itasca, South Cass, Koochiching, North St. Louis, South Itasca and North Cass Counties. This includes the Tribal Lands of the Bois Forte Band, Deer Creek and, Nett Lake areas. * WHEN...Until noon CST today. * IMPACTS...Plan on slippery road conditions. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions can be obtained by calling 5 1 1. Road conditions can also be found at 511mn.org for Minnesota or 511wi.gov for Wisconsin. && $$ WIZ002-170000- /O.NEW.KDLH.WW.Y.0023.211216T1800Z-211217T0000Z/ Bayfield- Including the cities of Washburn and Bayfield 1112 AM CST Thu Dec 16 2021 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL 6 PM CST THIS EVENING... * WHAT...Snow expected. Additional snow accumulations up to three inches. Winds gusting as high as 45 mph. * WHERE...Bayfield County. This includes the Tribal Lands of the Red Cliff Band. * WHEN...Until 6 PM CST this evening. * IMPACTS...Plan on slippery road conditions. Patchy blowing snow could significantly reduce visibility. The hazardous conditions could impact the evening commute. * ADDITIONAL DETAILS...Main areas of concern along and north of Highway 2 from local heavy snow. 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. && $$ MNZ012-019>021-034>038-161815- /O.CON.KDLH.WW.Y.0022.000000T0000Z-211216T1800Z/ Northern Cook and Lake-Central St. Louis-Southern Lake- Southern Cook-Crow Wing-Northern Aitkin-South Aitkin- Carlton and South St. Louis-Pine- Including the cities of Isabella, Hibbing, Two Harbors, Silver Bay, Grand Marais, Brainerd, Hill City, Aitkin, Duluth, Pine City, and Hinckley 1112 AM CST Thu Dec 16 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON CST TODAY... * WHAT...Snow. Additional snow accumulations of up to one inch. Winds gusting as high as 45 mph. * WHERE...Portions of east central and northeast Minnesota. * WHEN...Until noon CST today. * IMPACTS...Plan on slippery road conditions. Patchy blowing snow could significantly reduce visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions can be obtained by calling 5 1 1. Road conditions can also be found at 511mn.org for Minnesota or 511wi.gov for Wisconsin. && $$ For more information from the National Weather Service visit http://weather.gov/Duluth
522 WWUS43 KDLH 161758 WSWDLH URGENT - WINTER WEATHER MESSAGE National Weather Service Duluth MN 1158 AM CST Thu Dec 16 2021 MNZ010-011-018-025-026-033-161900- /O.EXP.KDLH.WS.W.0007.000000T0000Z-211216T1800Z/ Koochiching-North St. Louis-North Itasca-North Cass-South Itasca- South Cass- Including the cities of International Falls, Ely, Bigfork, Walker, Grand Rapids, and Pine River 1158 AM CST Thu Dec 16 2021 ...WINTER STORM WARNING WILL EXPIRE AT NOON CST TODAY... Snow is beginning to end in this area, so the warning is being allowed to expire. $$ MNZ012-019>021-034>038-161900- /O.EXP.KDLH.WW.Y.0022.000000T0000Z-211216T1800Z/ Northern Cook and Lake-Central St. Louis-Southern Lake- Southern Cook-Crow Wing-Northern Aitkin-South Aitkin- Carlton and South St. Louis-Pine- Including the cities of Isabella, Hibbing, Two Harbors, Silver Bay, Grand Marais, Brainerd, Hill City, Aitkin, Duluth, Pine City, and Hinckley 1158 AM CST Thu Dec 16 2021 ...WINTER WEATHER ADVISORY WILL EXPIRE AT NOON CST TODAY... Snowfall is beginning to subside through the afternoon, so the advisory is allowed to expire. $$ WIZ002-170000- /O.CON.KDLH.WW.Y.0023.211216T1800Z-211217T0000Z/ Bayfield- Including the cities of Washburn and Bayfield 1158 AM CST Thu Dec 16 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 PM CST THIS EVENING... * WHAT...Snow expected. Total snow accumulations of up to one inch. Winds gusting as high as 45 mph. * WHERE...Bayfield County. This includes the Tribal Lands of the Red Cliff Band. * WHEN...Until 6 PM CST this evening. * IMPACTS...Plan on slippery road conditions. Patchy blowing snow could significantly reduce visibility. The hazardous conditions could impact the evening commute. * ADDITIONAL DETAILS...Main areas of concern are along and north of Highway 2, where the highest local snowfall is expected. 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 |
|---|---|---|---|---|
| Dec 15, 3:56 AM CST | Dense Fog Advisory | DLH | Aitkin, Carlton, Cass, Cook, Crow Wing, Itasca and 4 more | 16 hr |
| Dec 15, 3:56 AM CST | High Wind Warning | DLH | Aitkin, Carlton, Cass, Cook, Crow Wing, Lake and 2 more | 32 hr |
| Dec 15, 3:56 AM CST | Wind Advisory | DLH | Aitkin, Carlton, Cass, Cook, Crow Wing, Itasca and 3 more | 29 hr |
| Dec 15, 3:57 AM CST | Winter Weather Advisory | DLH | Itasca, Koochiching, Saint Louis | 12 hr |
| Dec 15, 4:02 AM CST | Gale Warning | DLH | 42 hr | |
| Dec 15, 4:02 AM CST | Storm Warning | DLH | 31 hr | |
| Dec 15, 3:31 PM CST | Winter Weather Advisory | DLH | Aitkin, Carlton, Cook, Crow Wing, Lake, Pine and 1 more | 20 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.