An intense complex of thunderstorms tracked across most of southern Wisconsin, northern Illinois, and portions of northeast Wisconsin during the afternoon hours on June 10, 2026. Multiple measured wind gusts of 70+ MPH were reported as the storms moved across southern Wisconsin, resulting in widespread tree & power line 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 MKX wrote it up.
An intense complex of thunderstorms tracked across most of southern Wisconsin, northern Illinois, and portions of northeast Wisconsin during the afternoon hours on June 10, 2026. Multiple measured wind gusts of 70+ MPH were reported as the storms moved across southern Wisconsin, resulting in widespread tree & power line damage. Several areas of structural damage also occurred, with subsequent damage surveys identifying two EF0 tornadoes near the communities of Lomira and Eden. Analysis conducted by the Storm Prediction Center identified the June 10 thunderstorm complex as a derecho.
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 Milwaukee, WI wrote its last area forecast discussion before the first event at Jun 10, 11:19 AM CST, 1 hour 6 minutes earlier. Its key messages:
Area Forecast Discussion
National Weather Service Milwaukee/Sullivan WI
1219 PM CDT Wed Jun 10 2026
.KEY MESSAGES...
- Severe weather potential increasing across all of southern
Wisconsin this afternoon (peak 1-7 PM). All severe weather
hazards are possible, with some potential for significant
damaging wind gusts (60-80 MPH). Move indoors to safe shelter
immediately if a warning is issued for your area this
afternoon.
- A High Swim Risk is in effect from mid afternoon through late
tonight. High waves and dangerous currents will be likely,
and swimming is not advised at Sheboygan and Ozaukee beaches.
- Multiple rounds of storms continue tonight and Thursday.
Severe thunderstorms are likely at times.
- Warm and humid conditions expected today and Thursday.
&&
.SHORT TERM...
Issued 1215 PM CDT Wed Jun 10 2026
Tonight through Thursday night:
...Severe Weather Potential Increasing This Afternoon...
Rapid thunderstorm development is ongoing over eastern Iowa this
afternoon beneath an approaching MCV. Thunderstorm development
is ongoing within a very unstable environment with sufficient
overlapping effective shear values. Very unstable conditions are
in place downstream across southern Wisconsin, where surface
temperatures have soared into the mid-upper 80s with dew points
in the 70s. The unstable conditions will allow for continuation
of the Iowa storms into southern Wisconsin through the afternoon
hours, with increasing effective shear values allowing for
continued maintenance of storms at severe levels. A Severe
Thunderstorm Watch is now in effect for all of southern
Wisconsin until 7 PM ahead of this approaching activity.
A linear convective mode affiliated with the encroaching storms
will support damaging straight line winds as the predominant
severe weather hazard through this afternoon. Some wind gusts
could be significant (70+ MPH) given an unstable boundary layer
susceptible to downward transfers of higher momentum from aloft.
Line-embedded tornadoes are also possible, particularly in
northeasterly line surges & any mergers with any storm
development managing to occur ahead of the line. Torrential
downpours will also accompany storms, though progressive storm
motions should limit widespread flooding potential in this
initial round of storms. Move indoors and to immediate safe
shelter if a warning is issued for your area this afternoon.
Second disturbance is then forecast to pivot through the area
this evening, bringing additional convective potential along
with it. Peak potential for any storm redevelopment would be
between 7 PM and 1 AM. Coverage & severity of storms will be
heavily influenced by activity this afternoon, with current
trends suggesting that available instability will be heavily
depleted, leaving the intensity and coverage of storms in
question. Will be monitoring trends closely through this
afternoon and evening. Regardless of severity levels, any
redeveloping storms would be capable of producing additional
torrential downpours, which could lead to pockets of flooding in
any locations that are hit this afternoon. Given lower
confidence in preferred training corridors, have held off on any
Flood Watches in this forecast, but will be watching trends
closely through this evening/tonight.
Will then be turning attention to tomorrow's severe potential
following the conclusion of this evening's activity. As a bottom
line, another round of widespread severe storm development is
anticipated, with the most favored locations for storms being
along and south of a boundary laid down by morning
showers/storms. Peak timing for storms will be between 2 to 8
PM. All severe hazards will be possible. Will be monitoring
trends and providing additional details through this evening and
tonight. Stay tuned to the forecast.
Quigley
&&
.LONG TERM...
Issued 1220 PM CDT Wed Jun 10 2026
Friday through Wednesday:
A shortwave trough sitting over WI and a surface low pressure
system are expected to move northeast over Michigan and Ontario,
bringing a surface high to southern WI late Friday into early
Saturday morning. Drier conditions are expected Friday with temperatures
down into the 70s and humidity significantly decreasing.
Throughout Saturday, the potential for precipitation increases in
the afternoon (40-50%) into the evening (50-60%) as the shortwave
trough settles into WI alongside a cold front. Precipitable water
values of around 1.3" increase this potential. Temperatures are
expected to increase alongside humidity throughout the day into
the evening.
Primarily dry and cooler conditions Sunday through Monday as
surface pressure increases across the region and the shortwave
trough begins to move to the east. Shower/storm chances increase
into Tuesday (20-30%) as the shortwave trough begins to sink back
into WI and a surface low enters from the west. A similar chance
for precipitation for later Wednesday (20-30%) as the low pressure
system moves west, with an approaching high over the Plains.
Zawlocki
&&
.AVIATION...
Issued 1220 PM CDT Wed Jun 10 2026
Strong to severe storm potential over southern WI moving from the
southwest to northeast Wednesday afternoon into early evening
could produce many hazards, including large hail, damaging winds
(gusts up to 80 mph), and tornadoes. There is a continued chance
for showers/storms into Wednesday evening, with the primary threat
becoming heavy rainfall. VFR conditions across southern WI once
the storms pass Wednesday evening, shifting to MVFR overnight
with southwesterly winds across the region.
The potential for precipitation decreases overnight Wednesday
into early Thursday, bringing the potential for fog across
southern WI, primarily over the northern half of Lake Michigan.
IFR conditions are expected with winds shifting southeasterly
Thursday morning ahead of showers/storms, with potential for
gusty conditions. IFR conditions expected Thursday afternoon with
the potential for showers/storms, with some becoming severe.
Zawlocki
&&
.MARINE...
Issued 1220 PM CDT Wed Jun 10 2026
Showers/storms are expected to move east over Lake Michigan
Wednesday night, with a high potential for precipitation in the
southern half late Wednesday. Increasing fog potential over the
northern half of Lake Michigan Wednesday night, with increasing
potential over the entire lake early Thursday. Continued
southerly winds across Lake Michigan Wednesday night with
potential for gusty conditions.
A cold front/low pressure system is expected to move in Thursday
afternoon (29.76 inches), increasing the potential for
precipitation Thursday, with the chance of some storms becoming
severe. Winds are expected to shift southeasterly ahead of
precipitation, then to Westerly Friday.
Zawlocki
&&
.MKX WATCHES/WARNINGS/ADVISORIES...
WI...Beach Hazards Statement...WIZ052-WIZ060...4 PM Wednesday to 4
AM Thursday.
LM...Dense Fog Advisory...LMZ261-LMZ362-LMZ364-LMZ366-LMZ563-LMZ565-
LMZ567-LMZ868 until 7 PM Wednesday.
Dense Fog Advisory...LMZ643-LMZ644-LMZ645 until 1 PM Wednesday.
Small Craft Advisory...LMZ643-LMZ644...4 PM Wednesday to 1 AM
Thursday.
Dense Fog Advisory...LMZ669-LMZ671-LMZ673-LMZ870-LMZ872-LMZ874
until 2 PM Wednesday.
&&
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www.youtube.com/NWSMilwaukeeHazardous Weather Outlook National Weather Service Milwaukee/Sullivan WI 121 AM CDT Wed Jun 10 2026 WIZ046-047-051-052-056>060-062>072-110630- Marquette-Green Lake-Fond du Lac-Sheboygan-Sauk-Columbia-Dodge- Washington-Ozaukee-Iowa-Dane-Jefferson-Waukesha-Milwaukee- Lafayette-Green-Rock-Walworth-Racine-Kenosha- 121 AM CDT Wed Jun 10 2026 This Hazardous Weather Outlook is for portions of east central Wisconsin, south central Wisconsin and southeast Wisconsin. .DAY ONE...Today and Tonight Isolated storms are possible early to mid-morning today, with large hail a possibility if storms form. Confidence is on the low end with this storm potential. Dense fog is possible in the east towards Lake Michigan into mid- morning today. A High Swim Risk is in effect mid afternoon today into the evening. High waves and dangerous currents will be likely, and swimming is not advised at Sheboygan and Ozaukee beaches. Severe thunderstorms are possible this afternoon and evening, with all hazards possible. Heat indices in the mid to upper 90s are possible today, particularly across southeast Wisconsin. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday Severe thunderstorms will be possible on Thursday. There is a chance for thunderstorms on Saturday. .SPOTTER INFORMATION STATEMENT... Spotter activation will be needed today and Thursday. LMZ643>646-110630- Sheboygan to Port Washington WI- Port Washington to North Point Light WI- North Point Light to Wind Point WI- Wind Point WI to Winthrop Harbor IL- 121 AM CDT Wed Jun 10 2026 This Hazardous Weather Outlook is for the nearshore waters from Sheboygan Wisconsin to Winthrop Harbor Illinois. .DAY ONE...Today and Tonight Thunderstorms are possible today, especially this afternoon and evening when storms may reach severe levels. Areas of dense fog will continue through at least mid-morning today. A Small Craft Advisory is in effect north of North Point Light from mid-afternoon through the evening. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday Severe thunderstorms will be possible again on Thursday. Winds and waves may reach Small Craft Advisory levels again on Thursday. LMZ080-261-362-364-366-563-565-567-669-671-673-675-777-779-868- 870-872-874-876-878-110630- Lake Michigan Michigan City IN to St. Joseph MI 5 NM offshore to mid-line of lake.- Lake Michigan from Seul Choix Point to Rock Island Passage 5NM offshore to Mid Lake- Lake Michigan South of a line from Seul Choix Point to the Mackinac Bridge and North of a line from Charlevoix MI to South Fox Island 5NM offshore- Lake Michigan from Charlevoix to Point Betsie MI 5NM Offshore to mid lake- Lake Michigan from Point Betsie to Manistee MI 5NM offshore to Mid Lake- Lake Michigan from Rock Island Passage to Sturgeon Bay WI 5NM offshore to mid lake- Lake Michigan from Sturgeon Bay to Two Rivers WI 5NM offshore to Mid Lake- Lake Michigan from Two Rivers to Sheboygan WI 5NM offshore to Mid Lake- Lake Michigan from Sheboygan to Port Washington WI 5NM offshore to Mid Lake- Lake Michigan from Port Washington to North Point Light WI 5NM offshore to Mid Lake- Lake Michigan from North Point Light to Wind Point WI 5NM offshore to Mid Lake- Lake Michigan from Wind Point WI to Winthrop Harbor IL 5NM offshore to Mid Lake- Lake Michigan from Winthrop Harbor to Wilmette Harbor IL 5NM offshore to Mid Lake- Lake Michigan from Wilmette Harbor to Michigan City in 5NM offshore to Mid Lake- Lake Michigan from Pentwater to Manistee MI 5NM offshore to Mid Lake- Lake Michigan from Whitehall to Pentwater MI 5NM offshore to Mid Lake- Lake Michigan from Grand Haven to Whitehall MI 5NM offshore to Mid Lake- Lake Michigan from Holland to Grand Haven MI 5NM offshore to Mid Lake- Lake Michigan from South Haven to Holland MI 5NM offshore to Mid lake- Lake Michigan from St Joseph to South Haven MI 5NM offshore to Mid Lake- 121 AM CDT Wed Jun 10 2026 This Hazardous Weather Outlook is for the open waters of Lake Michigan. .DAY ONE...Today and Tonight Thunderstorms are possible today, especially this afternoon and evening when storms may reach severe levels. Areas of dense fog will continue through at least mid-morning today. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday Severe thunderstorms will be possible again on Thursday. www.weather.gov/mkx
The Milwaukee radar (KMKX), 134 km away, was scanning. The volume nearest the first event began at 18:24 UTC.
39 thunderstorm wind, 2 tornado. Local standard time, as filed.
Report of a downed tree on a structure in Mineral Point. Wind speed is an estimate from radar data & damage.
Report of a destroyed metal pole barn with scattered debris downwind. Wind speed estimated from radar data, damage, and nearby wind observations.
Trained spotter measures 88 MPH gust on home weather station.
Brigham Wisconet mesonet station.
Trained spotter reports large tree down on a home. Gust estimated from radar data & damage.
Emergency call center reports a roof blown off an apartment building in Dodgeville. Wind speed estimated from radar data and damage.
Public report of many large tree branches down across Black Earth. Wind speed estimated from radar data, nearby observations, and damage.
Trained spotter measures 70 MPH wind gusts.
Public report of a large branch split off of a mature tree. Wind speed estimated from radar data, nearby observations, and damage.
Public report of 61 MPH wind gusts as measured from a home weather station.
Public report of a large tree uprooted and on powerlines. Wind speed estimated from radar data, nearby observations, and damage.
Trained spotter reports downed 6 inch diameter tree branches. Wind speed estimated from radar data, nearby observations, and damage.
Public report of many downed tree branches. Wind speed estimated from radar data, nearby observations, and damage.
Trained spotter estimates 80 MPH wind gusts just west of Edgerton.
Public report of a 64 MPH wind gust as measured by a private weather station.
Public report of a 63 MPH wind gust as measured by a home weather station.
Trained spotter estimates 85 MPH wind gusts from observations and home weather station.
Public report of a large downed tree branch in Edgerton. Wind gust estimated from radar data and damage.
Public report of large downed tree branches. Wind gust estimated from radar data, nearby observations, and damage.
Public report of a large downed tree branch. Wind gust estimated from radar data and damage.
Trained spotter estimates 85 MPH wind gusts to the southeast of Rockdale.
Public report of a two foot diameter pine tree trunk snapped. Wind gust estimated from radar data and damage.
Public report of a 60 MPH wind gust as measured by a home weather station.
Trained spotter estimates 80 MPH wind gusts near Milton.
Fire and rescue reports a fallen tree on powerlines. Wind gust estimated from radar data, nearby observations, and damage.
Trained spotter estimates 75 MPH wind gusts in Fort Atkinson.
Photos of a destroyed barn outside of Beaver Dam. Wind gust estimated from radar data, nearby observations, and damage.
Public report of a 73 MPH wind gust from a home weather station.
Public report of a 70 MPH wind gust as measured by a home weather station.
Public report and photos of a large tree trunk snapped. Wind gust estimated from radar data, nearby observations and damage.
Emergency management reports damage to several structures in downtown Horicon. Wind gust estimated from radar data, nearby observations, and damage.
Public report of a downed tree near downtown Hartford. Wind gust estimated from radar data, nearby observations, and damage.
Report from a 911 call center of a downed tree on a house in Ripon. Wind gust estimated from radar data and damage.
Public report of multiple large downed tree branches. Wind gust estimated from radar data and damage.
Public report of a large downed tree branch on a roof with minor shingle damage. Wind gust estimated from radar data and damage.
Damage in a short path to the northeast across Lomira included several homes and mobile homes with roof damage, trees uprooted and limbs snapped.
Reports of several trees down in the communities of Fond du Lac and Brandon. Wind gust estimated from radar data and damage.
Damage to numerous trees, a few uprooted. Barn damaged with roof decking blown across the intersection of County Rd V and F.
Public report a small tree snapped half way up. Wind gust estimated from radar data and damage.
Emergency manager relays reports of many downed trees and power lines across the northern half of Sheboygan County. Wind gust estimated from nearby observations, radar data, and damage.
Kenosha Airport ASOS measures 60 MPH wind gusts.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Wisconsin in 2026Every state in 2026This day in weather historyThe tornado archive for Wisconsin, 2026Warnings in Wisconsin, June 2026
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: 1349303, 1349309, 1349275, 1349276, 1349310, 1349316, 1349318, 1349277, 1349319, 1349287, 1349320, 1349321, 1349322, 1349280, 1349289, 1349290, 1349279, 1349324, 1349325, 1349328, 1349282, 1349329, 1349291, 1349284, 1349330, 1349285, 1349331, 1349293, 1349292, 1349332, 1349337, 1349350, 1349352, 1349354, 1349355, 1349921, 1349358, 1349922, 1349359, 1349360, and more.