Hail, Dane
- When
- April 14, 12:00 AM CST
- Where
- Dane County, 1.38 mi N of Monona
- Measured
- 2 in hail
- Reported by
- Trained Spotter
- Coordinates
- 43.090, -89.320
Trained spotter reports 2 inch diameter hail north of Monona.
Numerous severe thunderstorms developed across southern Wisconsin during the afternoon and evening hours as a wave of low pressure moved across a stationary front over the region. Two main supercell thunderstorms developed along and north of Interstate 94 between Madison and Milwaukee, which produced softball sized hail and an EF-2 tornado.
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.
Numerous severe thunderstorms developed across southern Wisconsin during the afternoon and evening hours as a wave of low pressure moved across a stationary front over the region. Two main supercell thunderstorms developed along and north of Interstate 94 between Madison and Milwaukee, which produced softball sized hail and an EF-2 tornado. These storms would later merge while a squall line developed in south central Wisconsin which would then track through southeast Wisconsin. Elsewhere, a few storms had brief rotations show up, producing a tornado near Endeavor. The supercell thunderstorms and squall line trained over the same locations producing flash flooding mainly in urban areas.
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 Apr 13, 11:20 PM CST, 40 minutes earlier. Its key messages:
Area Forecast Discussion
National Weather Service Milwaukee/Sullivan WI
1220 AM CDT Tue Apr 14 2026
.KEY MESSAGES...
- Strong to severe storms will continue into tonight. Damaging
winds and an isolated tornado are the main threats. Locally
heavy rainfall is also possible.
- A Flood Watch remains in effect for counties north of I-94
tonight. Also expected rises on area rivers and cresting above
flooding stage with the additional rainfall.
- Additional windows for heavy rainfall, flooding, and severe
thunderstorms Tuesday, Wednesday and again later this week.
All severe hazards will be possible later Tuesday afternoon
into the evening.
&&
.SHORT TERM...
Issued 1220 AM CDT Tue Apr 14 2026
Tonight through Tuesday night:
A line of thunderstorms will roll through the forecast area over
the next few hours, as low pressure approaches along a stalled
frontal boundary. The main threat through 2-4 am will be
damaging winds, though an isolated tornado will be possible.
Given sustained instability overnight along with WSW 0-3 km
shear around 40 knots, any storm line segments that become more
north/south oriented could bow out increasing the wind threat
and also producing a QLCS tornado threat. The flooding concern
remains overnight as well, as the line of storms across the
northern forecast area slowly sags southward tonight, with some
back building currently evident over southeast MN and northeast
IA.
Storms may linger in the southeast forecast area towards around
daybreak, with dry weather then likely through the morning
hours. Attention then turns to another severe storm threat
during the afternoon and evening hours. The stalled frontal
boundary will be set up around the far northern forecast area in
the afternoon, as another weak surface low and shortwave
approach from the west. Plenty of instability is expected
across at least the south half of the forecast area, with
surface based CAPE of at least 3000 J/KG. Additionally, wind
profiles look more than sufficient for severe storms as a 45 kt
LLJ noses from the south by late afternoon. All severe hazards
will be possible as storms initialize between 3 and 6 pm, with a
decent chance for supercell development. Storms will likely
eventually organize into line or two, with the severe threat
leaning more towards wind and QLCS tornado at that point.
Locally heavy rainfall and flooding will be a concern as well,
especially if storms roll through the same areas that received
the heavier rainfall the last couple days. Adding to this
concern as that some of the latest models do show that a line of
storms may set up west to east across the southern half of the
forecast area tomorrow night, with some training possible.
DDV
&&
.LONG TERM...
Issued 1220 AM CDT Tue Apr 14 2026
Wednesday through Sunday:
It is still looking like the frontal boundary could remain far
enough north on Wednesday for another severe storm threat. This
will somewhat depend on what happens Tuesday/Tuesday night and
where the effective front ends up because of that round of
storms. Overall though, there is enough confidence to continue
to message a severe threat, with locally heavy rainfall also a
concern again.
Storms may linger Wednesday night into early Thursday, with a
break in activity then likely Thu afternoon into at least Friday
morning. Yet another round of storms is then possible Friday
evening into Saturday morning as a cold front finally pushes
through the region. The later timing of this front may somewhat
diminish the severe threat, due to the better interaction with
peak daytime heating Friday remaining to the west. Plenty of
time though for timing to change, so this period remains worth
keeping an eye on.
Much cooler conditions are expected to settle into the area this
weekend behind the departing low and cold front. Highs will
likely struggle to get out of the 40s by Sunday. It looks mainly
dry Sat afternoon through Sunday, though not out of the question
for a few snowflakes in the north Sat night as a shortwave rolls
through.
DDV
&&
.AVIATION...
Issued 1220 AM CDT Tue Apr 14 2026
A line of thunderstorms, potentially severe at times, is
expected to continue to drop southeast through southern
Wisconsin through around 09Z tonight. Damaging winds are the
main concern, with a tornado not out of the question. Low level
wind shear is likely this evening into tonight ahead of the
thunderstorms. Lower ceilings (1500 to 3000 ft) and visibilities
(2-5 miles) are anticipated as the line of storms move through.
A few storms may linger towards daybreak early Tue, with dry
weather likely through the morning hours. Low clouds may take a
good chunk of the morning to improve to VFR. Generally south to
southwest winds are expected tomorrow, though a few models do
show winds may turn onshore tomorrow near the lake by late
morning.
Another round of thunderstorms is expected tomorrow by late
afternoon or early evening, with the potential for severe
storms once again.
DDV
&&
.MARINE...
Issued 1220 AM CDT Tue Apr 14 2026
Shower and thunderstorm activity is expected across lake
Michigan late into tonight as low pressure of 29.6 inches over
southeast Minnesota continues to head northeast. Winds will be
easterly north of a frontal boundary across roughly the northern
half of the lake, with southerly winds expected in the south.
Then expecting another a couple passing low pressure system to
develop in the Plains and track across Lake Michigan again on
Tuesday and Wednesday. Each system will bring a chance for
showers and thunderstorms through the middle of the week. Areas
of dense fog will likely occur at times due to a relatively mild
and humid airmass over the cold waters paired with lighter
winds.
DDV
&&
.MKX WATCHES/WARNINGS/ADVISORIES...
WI...Flood Watch...WIZ046-WIZ047-WIZ051-WIZ052-WIZ056-WIZ057-WIZ058-
WIZ059-WIZ060 until 7 AM Tuesday.
LM...Dense Fog Advisory...LMZ261-LMZ362-LMZ364-LMZ366-LMZ563-LMZ565-
LMZ567-LMZ643-LMZ644-LMZ645-LMZ646-LMZ669-LMZ671-LMZ673-
LMZ675-LMZ868-LMZ870-LMZ872-LMZ874-LMZ876 until 7 AM
Tuesday.
&&
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www.youtube.com/NWSMilwaukeeHazardous Weather Outlook...UPDATED National Weather Service Milwaukee/Sullivan WI 909 PM CDT Mon Apr 13 2026 WIZ046-047-051-052-056>060-062>072-150215- Marquette-Green Lake-Fond du Lac-Sheboygan-Sauk-Columbia-Dodge- Washington-Ozaukee-Iowa-Dane-Jefferson-Waukesha-Milwaukee- Lafayette-Green-Rock-Walworth-Racine-Kenosha- 909 PM CDT Mon Apr 13 2026 This Hazardous Weather Outlook is for portions of east central Wisconsin, south central Wisconsin and southeast Wisconsin. .DAY ONE...Tonight Strong to severe thunderstorms possible late evening into tonight. Heavy rain and flooding potential will also be possible, especially across central WI. A Flood Watch is in effect for portions of east central and south central Wisconsin through Tuesday morning. .DAYS TWO THROUGH SEVEN...Tuesday through Monday Additional rounds of thunderstorms Tuesday through the end of the week. Heavy rain and flooding potential will accompanying this activity. Also will be strong to severe thunderstorm chances Tuesday afternoon through Wednesday and again toward the end of the week. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed this afternoon/evening across the central WI and will be needed areawide Tuesday and Wednesday. LMZ643>646-150215- 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- 909 PM CDT Mon Apr 13 2026 This Hazardous Weather Outlook is for the nearshore waters from Sheboygan Wisconsin to Winthrop Harbor Illinois. .DAY ONE...Tonight Areas of dense fog possible through tonight. Chances for thunderstorms tonight, with some strong to severe storms possible. .DAYS TWO THROUGH SEVEN...Tuesday through Monday Chances for thunderstorms continue through the end of the week, with some strong to severe storms possible. Areas of fog are possible into Tuesday morning. Some fog could become dense. LMZ080-261-362-364-366-563-565-567-669-671-673-675-777-779-868- 870-872-874-876-878-150215- 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- 909 PM CDT Mon Apr 13 2026 This Hazardous Weather Outlook is for the open waters of Lake Michigan. .DAY ONE...Tonight Areas of dense fog will possible tonight, particularly across the northern 3/4 of the lake where a Dense Fog Advisory is in effect. Chances for thunderstorms late this evening into tonight, some strong to severe storms possible. .DAYS TWO THROUGH SEVEN...Tuesday through Monday Chances for thunderstorms continue through the end of the week, some strong to severe storms possible. Areas of fog could continue through Tuesday morning. Some fog could become dense. www.weather.gov/mkx
Special Weather Statement
National Weather Service Milwaukee/Sullivan WI
1059 PM CDT Mon Apr 13 2026
WIZ046-047-051-140500-
Green Lake WI-Marquette WI-Fond Du Lac WI-
1059 PM CDT Mon Apr 13 2026
...STRONG THUNDERSTORMS WILL IMPACT NORTHWESTERN FOND DU LAC...GREEN
LAKE AND MARQUETTE COUNTIES THROUGH MIDNIGHT CDT...
At 1059 PM CDT, Doppler radar was tracking a cluster of strong
thunderstorms near Princeton, or 12 miles south of Wautoma, moving
northeast at 25 mph.
HAZARD...Wind gusts up to 40 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Ripon, Berlin, Montello, Markesan, Westfield, Princeton, Rosendale,
Green Lake, Brandon, Lawrence, Eldorado, Packwaukee, Mecan, Oxford,
Neshkoro, Fairwater, Van Dyne, Marquette, Glen Oak, and Lagoda.
This includes the following highways...
Interstate 39 between mile markers 103 and 119.
Interstate 41 between mile markers 103 and 109.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
A Severe Thunderstorm Watch remains in effect until 400 AM CDT for
south central and east central Wisconsin.
&&
LAT...LON 4390 8888 4389 8846 4394 8840 4371 8862
4373 8960 4398 8960 4398 8889
TIME...MOT...LOC 0359Z 241DEG 22KT 4389 8921
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH
KUROSKISpecial Weather Statement
National Weather Service Milwaukee/Sullivan WI
1106 PM CDT Mon Apr 13 2026
WIZ056-140500-
Sauk WI-
1106 PM CDT Mon Apr 13 2026
...A STRONG THUNDERSTORM WILL IMPACT SAUK COUNTY THROUGH MIDNIGHT
CDT...
At 1105 PM CDT, Doppler radar was tracking a strong thunderstorm 10
miles southeast of La Farge, or 12 miles north of Richland Center,
moving east at 60 mph.
HAZARD...Wind gusts up to 50 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Baraboo, Reedsburg, Prairie Du Sac, Sauk City, Wisconsin Dells, Lake
Wisconsin, Lake Delton, West Baraboo, Bluffview, North Freedom,
Merrimac, La Valle, Rock Springs, Loganville, Ironton, Lime Ridge,
Devils Lake St Park, and Hill Point.
This includes the following highways...
Interstate 90/94 between mile markers 88 and 100.
U.S. Highway 12 between mile markers 213 and 223.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
A Severe Thunderstorm Watch remains in effect until 400 AM CDT for
south central Wisconsin.
&&
LAT...LON 4364 8979 4360 8976 4360 8972 4357 8973
4356 8961 4337 8961 4335 8969 4331 8973
4328 8971 4326 8973 4331 9019 4355 9019
4356 9031 4364 9031
TIME...MOT...LOC 0405Z 271DEG 51KT 4351 9044
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH
KUROSKISpecial Weather Statement
National Weather Service Milwaukee/Sullivan WI
1131 PM CDT Mon Apr 13 2026
WIZ056-062-140530-
Iowa WI-Sauk WI-
1131 PM CDT Mon Apr 13 2026
...STRONG THUNDERSTORMS WILL IMPACT IOWA AND SOUTHERN SAUK COUNTIES
THROUGH 1230 AM CDT...
At 1131 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from 7 miles south of Wonewoc to 10 miles north of
Bloomington. Movement was east at 40 mph.
HAZARD...Wind gusts up to 50 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Dodgeville, Prairie Du Sac, Mineral Point, Lake Wisconsin, Spring
Green, Highland, Arena, Plain, Bluffview, Centerville, Avoca, Orion,
Linden, Cobb, Merrimac, Clyde, Governor Dodge St Park, Edmund,
Blackhawk Lake Rec Area, and London.
This includes the following highways...
U.S. Highway 18 between mile markers 49 and 50.
U.S. Highway 12 near mile marker 223.
U.S. Highway 151 between mile markers 35 and 47.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
A Severe Thunderstorm Watch remains in effect until 400 AM CDT for
south central Wisconsin.
&&
LAT...LON 4320 9043 4321 9029 4317 9019 4344 9019
4341 8960 4336 8965 4335 8969 4324 8977
4324 8980 4321 8984 4317 8984 4282 9019
4287 9043
TIME...MOT...LOC 0431Z 283DEG 35KT 4355 9018 4304 9090
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH
KUROSKISpecial Weather Statement
National Weather Service Milwaukee/Sullivan WI
1201 AM CDT Tue Apr 14 2026
WIZ052-140530-
Sheboygan WI-
1201 AM CDT Tue Apr 14 2026
...A STRONG THUNDERSTORM WILL IMPACT CENTRAL SHEBOYGAN COUNTY THROUGH
1230 AM CDT...
At 1201 AM CDT, Doppler radar was tracking a strong thunderstorm over
Plymouth, moving northeast at 55 mph.
HAZARD...Wind gusts up to 40 mph and penny size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor hail damage to vegetation is
possible.
Locations impacted include...
Sheboygan, Plymouth, Sheboygan Falls, Howards Grove, Kohler, Waldo,
Haven, Hingham, and Johnsonville.
This includes Interstate 43 between mile markers 123 and 135.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
A Severe Thunderstorm Watch remains in effect until 400 AM CDT for
east central Wisconsin.
&&
LAT...LON 4373 8771 4362 8791 4375 8808 4389 8790
4389 8773 4381 8773 4377 8770
TIME...MOT...LOC 0501Z 227DEG 48KT 4374 8792
MAX HAIL SIZE...0.75 IN
MAX WIND GUST...40 MPH
GAGANSpecial Weather Statement
National Weather Service Milwaukee/Sullivan WI
1202 AM CDT Tue Apr 14 2026
WIZ056-057-062-063-140530-
Columbia WI-Iowa WI-Sauk WI-Dane WI-
1202 AM CDT Tue Apr 14 2026
...STRONG THUNDERSTORMS WILL IMPACT NORTHEASTERN IOWA...SOUTHERN
COLUMBIA...NORTHWESTERN DANE AND SOUTHEASTERN SAUK COUNTIES THROUGH
1230 AM CDT...
At 1202 AM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from 6 miles north of Lake Wisconsin to 6 miles east
of Spring Green. Movement was east at 55 mph.
HAZARD...Wind gusts up to 50 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Waunakee, Prairie Du Sac, Sauk City, Lake Wisconsin, Deforest, Cross
Plains, Lodi, Poynette, Mazomanie, Black Earth, Dane, Arena,
Arlington, Merrimac, Harmony Grove, Morrisonville, Okee, and
Marxville.
This includes the following highways...
Interstate 39/90/94 between mile markers 113 and 127.
U.S. Highway 12 near mile marker 249.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
A Severe Thunderstorm Watch remains in effect until 400 AM CDT for
south central Wisconsin.
&&
LAT...LON 4343 8917 4314 8948 4305 8982 4313 9008
4343 8964
TIME...MOT...LOC 0502Z 271DEG 47KT 4347 8960 4318 8994
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH
KUROSKIThe Milwaukee radar (KMKX), 64 km away, was scanning. The volume nearest the first event began at 05:57 UTC.
104 hail, 6 tornado, 5 thunderstorm wind, 4 flash flood, 2 flood, 1 funnel cloud. Local standard time, as filed.
Trained spotter reports 2 inch diameter hail north of Monona.
Public report of 1 inch diameter hail near Mineral Point. Time confirmed via radar data.
Public report of 1 inch diameter hail near Ridgeway. Time confirmed via radar data.
Public report of 1 inch diameter hail in Barneveld. Time confirmed via radar data.
Public report of 1.50 inch diameter hail near Barneveld. Time confirmed via radar data.
Public report of 1 inch diameter hail near Barneveld. Time confirmed via radar data.
Public report of 1 inch diameter hail near Blue Mounds. Time confirmed via radar data.
Public report of 2 inch diameter hail southeast of Arena. Time confirmed via radar data.
Public report of 1.75 inch diameter hail west of Black Earth. Time confirmed via radar data.
Trained spotter reports 2.75 inch diameter hail with damaging to siding and roofs.
Trained spotter reports 1.75 inch diameter hail near Mazomanie. Time confirmed via radar data.
Public report of 1 inch diameter hail near the community of Riley. Time confirmed via radar data.
Trained spotter reports 2.5 inch diameter hail near Mazomanie. Time confirmed via radar data.
Public report of 1.5 inch diameter hail in Mazomanie. Time confirmed via radar data.
Public report of 1 inch diameter hail in Black Earth. Time confirmed via radar data.
Public report of 1.75 inch diameter hail near Middleton. Time confirmed via radar data.
Trained spotter reports 2.75 inch diameter hail to the southwest of Middleton. Time confirmed via radar data.
Public report of 1.5 inch diameter hail north of Verona. Time confirmed via radar data.
Public report of 1.25 inch diameter hail south of Middleton. Time confirmed via radar data.
Public report of 1.25 inch diameter hail south of Middleton. Time confirmed via radar data.
Public report of 1 inch diameter hail in Deerfield. Time confirmed via radar data.
Public report of 1.25 inch diameter hail southwest of Shorewood Hills. Time confirmed via radar data.
Trained spotter reports 1.25 inch diameter hail to the northeast of Deerfield. Time confirmed via radar data.
Trained spotter reports 2 inch diameter hail near Middleton. Time confirmed via radar data.
Public report of 1.25 inch diameter hail in Shorewood Hills. Time confirmed via radar data.
Trained spotter reports 2 inch diameter hail near Cross Plains.
Public report of 1 inch diameter hail near Shorewood Hills. Time confirmed via radar data.
Public report of 1.5 inch diameter hail near Middleton. Time confirmed via radar data.
Public report of 1 inch diameter hail in Shorewood Hills. Time confirmed via radar data.
Public report of 1.75 inch diameter hail in Middleton. Time confirmed via radar data.
Trained spotter reports 2.5 inch diameter hail in Middleton. Time confirmed via radar data.
Public report of 1.75 inch diameter hail near Middleton.
Trained spotter reports 2.00 inch diameter hail northeast of Middleton.
Public report of 1 inch diameter hail near Maple Bluff.
Public report of 1 inch diameter hail near Maple Bluff.
Public report of 2 inch diameter hail near Middleton.
A creek overflowing and some yard and basement flooding.
Trained spotter reports 1.5 inch diameter hail in Middleton.
Trained spotter reports 3 inch diameter hail near Maple Bluff.
Trained spotter reports near Middleton.
Public report of 1.5 inch diameter hail east of Maple Bluff.
Trained spotter reports 1 inch diameter hail near Maple Bluff.
Trained spotter reports 2 inch diameter hail near Marshall.
Public report of 1 inch diameter hail west of Cottage Grove.
Public report of 1 inch diameter hail near Shorewood Hills.
Public report of 1 inch diameter hail north of Maple Bluff.
Public report of 1 inch diameter hail northwest of Maple Bluff.
Trained spotter reports a funnel cloud to the south of their location in Maple Bluff. Time confirmed via radar data.
Trained spotter reports 1.5 inch diameter hail in Madison.
Trained spotter reports 3.25 inch diameter hail on the east side of the city of Madison.
Trained spotter reports 1 inch diameter hail in Madison.
Public report of 1 inch diameter hail east of Maple Bluff.
Public report of 1.5 inch diameter hail in Madison.
Trained spotter reports 2 inch diameter hail near Maple Bluff.
Trained spotter reports 2.75 inch diameter hail northeast of Maple Bluff.
Trained spotter reports 2.75 inch diameter hail in Maple Bluff.
Trained spotter reports 1 inch diameter hail near Sun Prairie.
Trained spotter reports 3 inch diameter hail near Maple Bluff.
Public report of 1.25 inch diameter hail west of Sun Prairie.
Trained spotter reports 2 inch diameter hail northeast of Monona.
Public report of 1.75 inch diameter hail northeast of Maple Bluff.
Trained spotter reports 2 inch diameter hail near Sun Prairie.
Public report of 1.25 inch diameter hail near Sun Prairie.
Trained spotter reports 1.25 inch diameter hail west of Sun Prairie.
Trained spotter reports 2.75 inch diameter hail northeast of Monona.
Trained spotter reports 2.5 inch diameter hail east of Maple Bluff.
Public report of 1.75 inch diameter hail west of Cottage Grove.
Public report of 1 inch diameter hail near Sun Prairie.
Public report of 1 inch diameter hail near Sun Prairie.
Trained spotter reports 3.5 inch diameter hail east of Maple Bluff.
Trained spotter confirms 4 inch diameter hail east of Maple Bluff. Size confirmed via photograph. Time confirmed via radar data.
Public report of 1 inch diameter hail near Sun Prairie.
Public report of 1.25 inch diameter hail east of Sun Prairie.
Trained spotter reports 2.5 inch diameter hail west of Cottage Grove.
Trained spotter reports 2.75 inch diameter hail west of Cottage Grove.
Public report of 1.75 inch diameter hail north of Cottage Grove.
Public report of 1.75 inch diameter hail near Cottage Grove.
Trained spotter reports 2.5 inch diameter hail in Cottage Grove.
Trained spotter reports 1.75 inch diameter hail in the town of Cobb.
Public report of 1 inch diameter hail north of Watertown.
Public report of 1 inch diameter hail in Watertown.
Trained spotter reports 1.75 inch diameter hail south of Watertown.
Trained spotter reports 1 inch diameter hail in Waterloo.
Public report of 1.25 inch diameter hail in Watertown.
Trained spotter reports 2.75 inch diameter hail southeast of Watertown.
Trained spotter reports 1.75 inch diameter hail in Watertown.
Public report of 1 inch diameter hail in Waterloo.
Trained spotter reports 1 inch diameter hail northwest of Lake Mills.
Trained spotter reports 1.5 inch diameter hail.
Public report of 1 inch diameter hail near Oconomowoc.
Public report of 1 inch diameter hail in Princeton.
Public report of 1 inch diameter hail in Hartland.
Public report of 1 inch diameter hail near Watertown.
Trained spotter reports thunderstorm wind damage.
Tornado appeared to develop in the Lisbon Oaks subdivision, causing mainly tree damage before intensifying closer to Highway 164. The tornado was at it's most intense near Indian Grass Lane where it caused damage to multiple businesses. The strongest damage was to an insurance car shop port that had a well anchored roof that was completely blown off and found approximated 3 to 4 blocks to the east near Highway 164. Damage then occurred to a church near Wildwood Way and multiple homes along Conservancy Court. Tornado appeared to end near Waukesha Ave along Linda Dr.
Public report of 2 inch diameter hail west of Endeavor.
The tornado started near Grouse Rd east of Briggsville and then tracked to the northeast. The worst damage was to an onion farm south of County Road O. The tornado crossed Interstate 39 and dissipated near County Road CX. Storm chaser videos and photos along with security camera footage from the onion farm confirm the tornado.
Public report of 1 inch diameter hail southwest of Richfield.
Flash flooding of streets in Watertown. A few stranded vehicles across the city. A 3 to 4 foot sinkhole occurred due to the floodwaters.
Public report of 1.25 inch diameter hail south of Richfield.
Trained spotter reports 2 inch diameter hail northeast of Menomonee Falls.
Public report of 1.25 inch diameter hail near Menomonee Falls.
Public report of 1 inch diameter hail east of Butler.
Public report of 1 inch diameter hail near Germantown.
Public report of 1.5 inch diameter hail near Merton.
Public report of 1 inch diameter hail northeast of Menomonee Falls.
Public report of 1 inch diameter hail in Germantown.
Trained spotter reports 1.25 inch diameter hail southeast of Germantown.
Public report of 1 inch diameter hail southeast of Germantown.
Trained spotter estimates 70 MPH wind gusts.
Public report of 1 inch diameter hail in Ripon.
Flash flooding of streets in southern Ozaukee County. More specifically, flooded roads and intersections on Mequon Rd. from Wauwatosa Rd. to just east of I-43. Other intersections across the area with 3-6 inches of standing water.
Flash flooding of streets from Sussex toward Menomonee Falls.
Some street flooding in Germantown.
Flash flooding of streets and sidewalks mainly in northwest Milwaukee County, including stranded vehicles in floodwaters. Some reports of basement flooding in northern Milwaukee County. Pictures and videos provided.
Trained spotter reports broken tree branches and limbs.
Trained spotter estimates 70 MPH wind gusts.
The tornado started northwest of County Road ES, west of Interstate 43, south of East Troy where it heavily damaged two barns. Corn stubble was noted to be deposited from the corn field to the west all along a path through a cemetery up to Interstate 43. Some tree damage was noted along Alpine Valley Golf Course. The tornado then moved along County Road D and caused additional damage to some barns and outbuildings along with numerous trees. The tornado ended somewhere south of County Road D and northwest of Valley View Road.
The tornado developed northwest of Honey Creek Road and then hit a barn along the road, shifting it off of its foundation. The tornado then continued southeast toward Waterford, removing sheet metal from a shed along Buena Park Rd. The tornado then continued through the north side and downtown Waterford where most of the damage was to trees and houses from the trees falling on them. A few trees were noted to have been lofted and dropped into the Fox River. The tornado then continued through the east side of Waterford before ending near Highway 36.
Trained spotter reports uprooted trees and shingle damage from thunderstorm winds.
Sporadic damage path along Plank Road with mainly tree damage. Some barn/outbuildings had damage to their roofs with sheet metal panels missing/lofted in 2 locations.
The tornado began northwest of Somers, east of Interstate 94. It went through the north and east side of the city, through the fire department and near Somers Elementary School. Numerous trees were uprooted along the path, some falling into houses.
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, April 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: 1330395, 1329412, 1329415, 1329413, 1329414, 1329418, 1329419, 1329416, 1329417, 1329420, 1329421, 1329432, 1329422, 1329426, 1329423, 1329424, 1329425, 1329436, 1329429, 1329430, 1329427, 1329428, 1329431, 1329433, 1329440, 1330324, 1329434, 1329435, 1329437, 1329438, 1329439, 1330321, 1330322, 1330323, 1330325, 1330332, 1333772, 1330326, 1330327, 1330328, and more.