Thunderstorms developed over west-central Wisconsin during the afternoon of Thursday, June 24th. These storms developed in an area of strong instability and ample wind shear to cause rotating storms.
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Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS MPX wrote it up.
Thunderstorms developed over west-central Wisconsin during the afternoon of Thursday, June 24th. These storms developed in an area of strong instability and ample wind shear to cause rotating storms. A tornado formed near Bruce, Wisconsin and caused damage to XX. As the storm moved southeast, and built to the west, large hail fell near Bloomer, Wisconsin and parts of Chippewa and Eau Claire counties before moving off to the southeast. Another brief tornado occurred on the south side of Stanley and was caught on video.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Twin Cities, MN wrote its last area forecast discussion before the first event at Jun 24, 1:52 PM CST, 38 minutes earlier.
Area Forecast Discussion National Weather Service Twin Cities/Chanhassen MN 252 PM CDT Thu Jun 24 2021 .SHORT TERM...(This evening through Friday night) Issued at 247 PM CDT Thu Jun 24 2021 The cold front has moved through most of the forecast area except for southeastern Minnesota and parts of west central Wisconsin. Storms look to fire along the front later this afternoon and quickly move off to the east. There is good instability along the front with mesoanalysis showing SBCAPE 3000-4000 J/kg and bulk shear 30-35 kts which could result in a severe storm or two in eastern portions of our Wisconsin forecast area. Guidance has been shifting the redevelopment further and further to the south and east, and with the stronger forcing over Wisconsin, it looks like our Minnesota counties will unfortunately stay dry. One strong storm has developed in northern Chippewa county and southern Rusk county, and satellite shows a couple of other towers trying to go up. Any severe storms that do develop would have damaging winds and large hail as the main threats. Dewpoints have been falling behind the front as more comfortable air has been filtering down from the north. After any storms exit this evening we will be dry through most of Friday before low pressure moving south of the area through Iowa brings back the chance for showers to southern parts of the forecast area Friday night. Temperatures won't change much behind the front with Friday being only slightly cooler than today, but with more comfortable dewpoints for all. .LONG TERM...(Saturday through Thursday) Issued at 247 PM CDT Thu Jun 24 2021 This looks likely to be a more active period with multiple chances for some much needed rain. As is typical for summer though much of this rain will be convective in nature, so rainfall totals will vary significantly over short distances. From Saturday into the middle of next week the different deterministic systems are in good agreement of troughing present over a region from the Dakotas to the western Great Lakes. Also there will be a slow moving surface low that generally remains in the Midwest for much of this period. This will leave us in an area of generally favorable synoptic lift for much of this period. As the best chances for rain will be convectively driven, PoPs will be the highest in the afternoon and evening with diurnally driven convection. With Minnesota and western Wisconsin generally staying on the north side of the surface low, we will be on the cooler side. This means that the recent heat will not be present over this period. Expect near normal temperatures from this weekend into next week. As is often the case though some of the higher terrain over the Minnesota River Valley in western Minnesota could over perform and reach into the upper 80s. Surface relative humidity do not look high so it should remain comfortable. Minimum relative humidity values could reach into levels critical for fire weather, but with chances for rain and high winds not forecast there are no fire weather concerns at this time. && .AVIATION...(For the 18Z TAFS through 18Z Friday afternoon) Issued at 1229 PM CDT Thu Jun 24 2021 VFR conditions throughout at all terminals, except for KEAU. A cold front is moving across the forecast area with winds switching to the north behind the front. Thunderstorms look to form along the front in southeastern Minnesota to West central Wisconsin. These storms may clip KEAU later this afternoon, but otherwise terminals should stay dry. KMSP...No concerns. /OUTLOOK FOR KMSP/ Sat...VFR. Chc -TSRA/MVFR. Wind NW 5-10 kts. Sun...VFR. Chc -TSRA/MVFR. Wind NW 5 kts. Mon...VFR. Chc -TSRA/MVFR. Wind NW 5-10 kts. && .MPX WATCHES/WARNINGS/ADVISORIES... MN...None. WI...None. && SHORT TERM...CEO LONG TERM...NDC AVIATION...CEO
Hazardous Weather Outlook National Weather Service Twin Cities/Chanhassen MN 225 PM CDT Thu Jun 24 2021 WIZ016-025>028-251930- Rusk-Dunn-Pepin-Chippewa-Eau Claire- 225 PM CDT Thu Jun 24 2021 This Hazardous Weather Outlook is for portions of northwest Wisconsin and west central Wisconsin. .DAY ONE...Tonight. A couple strong or severe storms with large hail and damaging winds are possible this afternoon. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... SKYWARN spotter activation may be needed this evening. MNZ041>045-047>070-073>078-082>085-091>093-WIZ014-015-023-024- 251930- Douglas-Todd-Morrison-Mille Lacs-Kanabec-Stevens-Pope-Stearns- Benton-Sherburne-Isanti-Chisago-Lac Qui Parle-Swift-Chippewa- Kandiyohi-Meeker-Wright-Hennepin-Anoka-Ramsey-Washington- Yellow Medicine-Renville-McLeod-Sibley-Carver-Scott-Dakota- Redwood-Brown-Nicollet-Le Sueur-Rice-Goodhue-Watonwan-Blue Earth- Waseca-Steele-Martin-Faribault-Freeborn-Polk-Barron-St. Croix- Pierce- 225 PM CDT Thu Jun 24 2021 This Hazardous Weather Outlook is for portions of central and southern Minnesota, and west central Wisconsin. .DAY ONE...Tonight. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... SKYWARN spotter activation may be needed.
Special Weather Statement National Weather Service Twin Cities/Chanhassen MN 233 PM CDT Thu Jun 24 2021 WIZ016-027-242015- Chippewa-Rusk- 233 PM CDT Thu Jun 24 2021 ...A STRONG THUNDERSTORM WILL AFFECT SOUTHWESTERN RUSK AND NORTH CENTRAL CHIPPEWA COUNTIES... At 233 PM CDT, a strong thunderstorm was located 8 miles northeast of New Auburn, or 20 miles southwest of Ladysmith, moving east at 10 mph. Winds in excess of 30 mph and half inch hail are possible with this storm. Locations impacted include... Island Lake and Chippewa Moraine State Rec Area. Torrential rainfall is also occurring with this storm, and may cause localized flooding. Do not drive your vehicle through flooded roadways. This storm may intensify, so be certain to monitor local radio stations and available television stations for additional information and possible warnings from the National Weather Service. LAT...LON 4512 9129 4525 9154 4535 9154 4534 9106 TIME...MOT...LOC 1933Z 284DEG 10KT 4527 9142
The La Crosse radar (KARX), 150 km away, was scanning. The volume nearest the first event began at 20:30 UTC.
3 hail, 2 tornado, 1 thunderstorm wind. Local standard time, as filed.
A large tree was snapped off northeast of Bloomer. A photo was sent through social media.
A tornado moved toward the north-northwest and struck a farm toward the end of its path. The roof of a shed was lifted up and pushed, some concrete blocks were knocked over. Siding of a house was ripped off. A few trees were downed. The starting point was based on video. Three videos were available. The damage survey of the farm was provided by a storm chaser.
There was a photo of 2 diameter hail that was sent on social media.
Video of a tornado was provided via a TV station's social media site. The tornado was over a field and caused no known damage.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Wisconsin in 2021Every state in 2021This day in weather historyThe tornado archive for Wisconsin, 2021Warnings in Wisconsin, June 2021
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 956178, 957094, 956175, 956176, 956177, 957099.