Diurnally driven thunderstorms developed across the Upper Peninsula and tracked south through north-central Wisconsin during the late afternoon and early evening hours, producing isolated wind damage.
Every event with a place to put it. Tap one for its entry below.
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 GRB wrote it up.
Diurnally driven thunderstorms developed across the Upper Peninsula and tracked south through north-central Wisconsin during the late afternoon and early evening hours, producing isolated wind damage.
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 Green Bay, WI wrote its last area forecast discussion before the first event at Jun 8, 2:57 PM CST, 1 hour 31 minutes earlier.
Area Forecast Discussion National Weather Service Green Bay WI 357 PM CDT Tue Jun 8 2021 Forecast discussion for routine afternoon forecast issuance .SHORT TERM...Tonight and Wednesday Issued at 356 PM CDT Tue Jun 8 2021 Scattered thunderstorms are possible this afternoon through early evening along the Lake Michigan and lake Winnebago boundaries. Thunderstorms are also expected ahead of a weak cold front over northcentral Wisconsin late this afternoon. They should move south before dissipating tonight. Winds aloft are very light, so any thunderstorms could produce very heavy rain. Gusty surface winds and possibly small hail could accompany the strongest storms. Lows tonight will be about 10 degrees above normal. Slightly cooler and drier air will arrive Wednesday behind the weak cold front, but high temperatures will still be well above normal. Scattered thunderstorms are possible across central and northcentral Wisconsin in the afternoon. .LONG TERM...Wednesday Night Through Tuesday Issued at 356 PM CDT Tue Jun 8 2021 The main highlights from this forecast period are the continued above normal temperatures through the weekend, followed by the potential for a cool down early next week. Until that cool down, sporadic chances for showers and storms are expected with a more significant chance late Friday night through Saturday. Wednesday night through Thursday night...Lingering showers and storms across north-central WI will come to an end by late Wednesday evening. Look for another humid night for Wednesday with low temperatures well above normal in the 60s. An upper-level ridge, with light winds aloft, will remain overhead into Thursday. This will keep the warm, moist air in place. A surface boundary or some sort of convergence from lake breezes appears to produce isolated showers and storms in Upper MI late Thursday afternoon, which slowly creeps south into north-central and far northeast WI Thursday evening/night. In addition, a mid-level shortwave will slide southeast over eastern Lake Superior/eastern Upper MI, which will add to the shower and storm potential Thursday night. Do not anticipate severe weather with these storms due to the weak bulk shear. However, heavy downpours would be possible due to the slow movement of any storms from the weak winds aloft. High temperatures for Thursday will remain above normal with values ranging from the middle 80s to lower 90s away from the lake, and upper 70s to lower 80s along the lake. Another mild and humid night is anticipated for Thursday night as well with temps in the 60s. Rest of the extended...While the boundary shifts slightly north into Friday morning, the upper-level ridge will build right overhead. This should keep most of Friday dry before a mid-level shortwave and surface cold front moves into the western portions of the forecast area Friday evening. The shortwave and cold front will slowly slide southeast across the forecast area into Saturday evening. Showers and storms are expected during this time, however, do not anticipate severe weather occurring since bulk shear still doesn't look to support severe storms, but the potential for heavy downpours will remain possible. Beyond Saturday, the upper-level ridge breaks down to a zonal flow Saturday night, then transitions to a northwest flow on Sunday, which looks to continue through early next week. This northwest flow will bring "cooler" and drier air to the forecast area. High temperatures early next week look to drop back to the upper 70s to middle 80s. && .AVIATION...for 18Z TAF Issuance Issued at 1245 PM CDT Tue Jun 8 2021 Dense fog was along the Lake Michigan shore as very warm and humid air flow over the cold water. The airports at Ephraim, Washington Island and Manitowoc could see IFR conditions if the fog makes it that far inland. The fog extends over nearly all of the lake. Outside of the foggy areas, VFR conditions were observed. Convective clouds were forming along the lake breezes produced by Green Bay, Lake Winnebago and Lake Michigan. Scattered thunderstorms are possible along those boundaries during the afternoon and evening hours. A weak cold front is expected to produce thunderstorms in far northern Wisconsin by early evening, which will move south and dissipate tonight. Wednesday should feature VFR conditions in most areas, with a chance of afternoon thunderstorms in central and northcentral Wisconsin. && .GRB WATCHES/WARNINGS/ADVISORIES... NONE. && SHORT TERM.....RDM LONG TERM......Hykin AVIATION.......RDM
Hazardous Weather Outlook National Weather Service Green Bay WI 252 PM CDT Tue Jun 8 2021 WIZ005-010>013-018>022-030-031-035>040-045-048>050-073-074-092000- Vilas-Oneida-Forest-Florence-Northern Marinette County-Lincoln- Langlade-Menominee-Northern Oconto County-Door-Marathon-Shawano- Wood-Portage-Waupaca-Outagamie-Brown-Kewaunee-Waushara-Winnebago- Calumet-Manitowoc-Southern Marinette County- Southern Oconto County- 252 PM CDT Tue Jun 8 2021 This Hazardous Weather Outlook is for north-central and northeast Wisconsin. .DAY ONE...Tonight Scattered thunderstorms are possible inland from the lake and bay. The storms will be slow moving, and could produce locally heavy rain and wind gusts to 40 mph. Fog may reduce the visibility along the Lake Michigan shoreline at times, possibly resulting in hazardous travel conditions. .DAYS TWO THROUGH SEVEN...Wednesday through Tuesday There is a chance of thunderstorms over central and north-central Wisconsin Wednesday. They are not expected to be severe. Additional thunderstorms are possible at times from Thursday afternoon to Saturday afternoon. It is too early to determine if these storms will be severe. .SPOTTER INFORMATION STATEMENT... Spotter activation should not be needed tonight, but spotters are asked to report rainfall over one inch or wind gusts over 40 mph. LMZ521-522-541>543-092000- The Bay of Green Bay south of a line from Cedar River MI to Rock Island Passage-Lake Michigan from Washington Island to Sheboygan- 252 PM CDT Tue Jun 8 2021 This Hazardous Weather Outlook is for portions of northwest Lake Michigan and the waters of Green Bay. .DAY ONE...Tonight Areas of dense fog could make navigation hazardous on Lake Michigan tonight. .DAYS TWO THROUGH SEVEN...Wednesday through Tuesday Dense fog may continue to pose a hazard to boaters on Lake Michigan into Wednesday morning. There is a chance of thunderstorms Friday and Saturday. RDM/Hykin
Special Weather Statement
National Weather Service Green Bay WI
117 PM CDT Tue Jun 8 2021
WIZ038-048-049-081900-
Calumet WI-Outagamie WI-Winnebago WI-
117 PM CDT Tue Jun 8 2021
...SPECIAL WEATHER STATEMENT...
At 114 PM CDT, Doppler radar was tracking thunderstorms along a line
extending from near Kimberly to Stickbridge to Fond Du Lac. Movement
was west at 10 mph.
Very heavy rain and wind gusts to 30 mph will be possible with these
storms.
Locations impacted include...
Appleton, Oshkosh, Menasha, Kaukauna, Little Chute, Kimberly, Central
Lake Winnebago, Northern Lake Winnebago, Darboy and High Cliff State
Park.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
If on or near Lake WInnebago, get out of the water and move indoors
or inside a vehicle. Remember, lightning can strike out to 10 miles
from the parent thunderstorm. If you can hear thunder, you are close
enough to be struck by lightning. Move to safe shelter now! Do not
be caught on the water in a thunderstorm.
&&
LAT...LON 4390 8864 4427 8860 4431 8819 4424 8819
4424 8818 4396 8822 4394 8824 4394 8840
4389 8840
TIME...MOT...LOC 1814Z 070DEG 10KT 4422 8827 4395 8830 4376 8844
RDMPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREEN BAY WI
129 PM CDT TUE JUN 8 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0119 PM TSTM WND GST 2 NNW QUINNEY 44.03N 88.31W
06/08/2021 E40 MPH CALUMET WI PUBLIC
&&Special Weather Statement National Weather Service Green Bay WI 345 PM CDT Tue Jun 8 2021 WIZ005-010>012-018-019-030-090000- Vilas-Oneida-Forest-Florence-Lincoln-Langlade-Marathon- 345 PM CDT Tue Jun 8 2021 ...STRONG THUNDERSTORMS POSSIBLE IN NORTH CENTRAL WISCONSIN LATE THIS AFTERNOON... Thunderstorms will continue to develop over north central and far northeast Wisconsin late this afternoon. A few of the storms could become strong, with wind gusts to 40 to 50 mph and small hail. The storms will be slow-moving, and capable of producing brief torrential downpours. Campers, boaters, fishermen and others with outdoor plans should keep an eye on the sky and be prepared to seek shelter indoors when storms approach. Kieckbusch
Special Weather Statement
National Weather Service Green Bay WI
457 PM CDT Tue Jun 8 2021
WIZ011-012-082245-
Florence WI-Forest WI-
457 PM CDT Tue Jun 8 2021
...STRONG THUNDERSTORM JUST SOUTH OF THE UPPER PENINSULA BORDER...
At 456 PM CDT, Doppler radar was tracking a strong thunderstorm near
Wisconsin Slough Natural Area, or 10 miles southwest of Iron River,
moving south at 10 mph.
Nickle size hail and heavy rainfall will be possible with this storm.
Locations impacted include...
Tipler, Wisconsin Slough Natural Area, Alvin, Nelma and Stevens Lake
Campground.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.
&&
LAT...LON 4602 8882 4603 8878 4602 8878 4603 8877
4602 8876 4603 8873 4601 8872 4601 8868
4599 8867 4599 8862 4600 8861 4586 8857
4585 8884 4605 8888
TIME...MOT...LOC 2156Z 350DEG 7KT 4596 8873
UhlmannThe Marquette radar (KMQT), 127 km away, was scanning. The volume nearest the first event began at 22:29 UTC.
4 thunderstorm wind. Local standard time, as filed.
Thunderstorm winds downed trees near Phelps. The time of this report is an estimate based on radar data.
Thunderstorm winds downed trees in Crandon. The time of this report is an estimate based on radar data.
Thunderstorm winds downed trees near Pembine. The time of this report is an estimate based on radar data.
Thunderstorm winds downed trees and a power line near Post Lake. The time of this report is an estimate based on radar data.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Wisconsin in 2021Every state in 2021This day in weather historyWarnings 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: 953570, 953571, 953572, 953573.