Alert archive / Wisconsin / Tornado Warnings in 2026
Tornado Warning 40, NWS Milwaukee, WI
NWS Milwaukee, WI issued this tornado warning at Apr 17, 2026, 6:40 PM CDT for Walworth County, Wisconsin. It was in force for 35 min. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Apr 17, 2026, 6:40 PM CDT (23:40 UTC)
- Expired
- Apr 17, 2026, 7:15 PM CDT
- In force
- 35 min
- Issued by
- NWS Milwaukee, WI
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 1.0 in
County Walworth County, WI
The radar
The Milwaukee radar (KMKX), 19 km from the middle of the area, began a volume at 23:43 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 |
|---|---|---|---|
| Apr 17, 7:02 PM CDT | HAIL 1 | 3 Se Palmyra, WI |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
Did it verify
Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this tornado warning while it was in force. That is not proof nothing happened: reports are thin where few people live.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Apr 17, 12:40 PM CDT | Tornado Watch | SPC | 9 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 11.7 hours before the alert went out and 294 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
- 84 J/kg
- Mixed-layer CIN
- -150 J/kg
- Mixed-layer LCL
- 1053 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 65 m²/s²
- 0-3 km storm-relative helicity
- 164 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted.
754
WFUS53 KMKX 172340
TORMKX
WIC127-180015-
/O.NEW.KMKX.TO.W.0040.260417T2340Z-260418T0015Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Milwaukee/Sullivan WI
640 PM CDT Fri Apr 17 2026
The National Weather Service in Milwaukee/Sullivan has issued a
* Tornado Warning for...
Northwestern Walworth County in southeastern Wisconsin...
* Until 715 PM CDT.
* At 640 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Palmyra, or near Whitewater, moving northeast at
30 mph.
HAZARD...Tornado and quarter size hail.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed.
Damage to roofs, windows, and vehicles will occur. Tree
damage is likely.
* This dangerous storm will be near...
East Troy around 645 PM CDT.
Other locations impacted by this tornadic thunderstorm include Troy
Center and La Grange.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 4278 8870 4284 8860 4284 8839 4279 8841
4275 8866
TIME...MOT...LOC 2340Z 237DEG 27KT 4279 8861
TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
$$
CMILLERWhat forecasters said that day
The local office's own words before this tornado warning went out, 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 this tornado warning went out at Apr 17, 2:44 PM CDT, 3 hours 56 minutes earlier. Its key messages:
- Thunderstorms with higher-end severe potential and heavy rainfall is expected this afternoon and early evening. An Enhanced Risk (3 out of 5) for severe weather exists over the western half of the CWA. Heavy rain over saturated ground may lead to flash flooding.
- A Flood Watch in effect for all of southern Wisconsin until 7am Saturday.
- Marine Dense Fog continues through tonight.
Area forecast discussion, Apr 17, 2:44 PM CDT, 3 hours 56 minutes before
Area Forecast Discussion...UPDATED
National Weather Service Milwaukee/Sullivan WI
244 PM CDT Fri Apr 17 2026
.KEY MESSAGES...
- Thunderstorms with higher-end severe potential and heavy
rainfall is expected this afternoon and early evening. An
Enhanced Risk (3 out of 5) for severe weather exists over the
western half of the CWA. Heavy rain over saturated ground may
lead to flash flooding.
- A Flood Watch in effect for all of southern Wisconsin until
7am Saturday.
- Marine Dense Fog continues through tonight.
&&
.UPDATE...
Issued 244 PM CDT Fri Apr 17 2026
The storms fired along that leading cumulus field that was in
eastern Iowa right around noon. They grew and evolved into a
broken line of supercells and are now tracking a little slower
to the east. The MLCAPE is on the 2000-2500j/kg gradient and the
bulk shear is 40 to 50kt. The significant tornado parameter is
pushing 4 in this region, and the sig hail parameter is 3. These
parameters diminish as the cells congeal into a line over the
next few hours, but wind and line-embedded tornadoes will become
a higher risk.
Radar and satellite are also showing the cold frontal boundary
(just north of Twin Cities to Rochester to just east of Des
Moines) light up with numerous mini supercells. If this initial
round of storms take control for the afternoon, which they are
expected to, this will diminish the intensity of the storms
along the cold front as it tracks across southern WI during the
early evening between 6 and 9 PM. However, if this first round
underperforms, meaning does not produce widespread thunderstorms
(and a cold pool), then the storms along the frontal boundary
will be able to maintain its strength as it moves through.
The other scenario noted in the most recent small-scale model
runs is that the storms along the frontal boundary may
accelerate and catch up to this initial round. The way things
are moving, this seems like a likely scenario. The 18Z HRRR is
hinting at this. This would mean the convection would rush out
ahead of the main front and there will still be a chance for
showers and isolated thunder to linger until that front clears
our area during the overnight hours.
Heavy rain and flash flooding are still a threat due to high
precipitable water and repeated rounds of storms over already-
saturated soil.
Cronce
&&
.SHORT TERM...
Issued 1207 PM CDT Fri Apr 17 2026
Tonight and Saturday:
Nearly all of southern WI has sunshine as of 1130 this morning.
The fog and low stratus are hanging on over east central WI, but
the increasing southerly winds will help that to erode quickly
through the early afternoon. Temperatures are rising quickly,
with areas west of Madison already in the lower 70s. Dewpoints
are rising as well, with lower 60s in the southwest. Gusty winds
are developing as we start to mix out our low layer inversion
and diurnal cu are also popping up. This is all conducive for
priming our environment for convection this afternoon.
The main change for today is that we are expecting storms to
develop and move into southwest WI earlier than forecast, now
between 1 and 5 PM. Storms triggered along a gravity wave just
south of the Twin Cities around 8 am. If we trace that gravity
wave down into Iowa on satellite, the cumulus clouds are
focusing along it. The leading edge of this is now entering
northeast IA and far southeast MN. The timing of it to arrive
in Madison is 230PM/1930Z, give or take a half hour. There is no
lighting in eastern IA yet, but we are watching for that to
happen within the next 30 to 60 minutes.
Whatever develops in IA and tracks eastward is our main show in
southern WI for today. All hazards are on the table. High CAPE,
shear and helicity all point to a large hail (greater than 2
inches), damaging wind and tornado potential. If tornadoes
develop, they would be on the strong side. As any discrete cells
congeal into a line as they head into eastern WI, the severe
threat will be mainly for damaging wind and QLCS tornadoes. With
0 to 3 km shear vectors up to 50 kt and aligned perpendicular
to the line of storms (and streamwise vorticity of 45-50 kt),
brief spin- up tornadoes are favorable along the leading edge
within any notches/bowing line segments.
There is still a chance that the storms that develop in Iowa
could skirt just to the south of WI and be the strongest across
northern IL this afternoon. If I had to guess, the strongest
storms should be over the south half of southern WI. However,
there is still a severe threat for all of WI, including north
central all the way to Green Bay.
The actual cold front is back in south central MN and central
IA. This is a very strong front, with over a 20 degree temp drop
behind it. Storms will be well ahead of the front, but once our
afternoon storms clear, we will still have a chance for
scattered showers and thunderstorms (not severe) until the
actual front passes during the late evening and overnight hours.
Cronce
&&
.LONG TERM...
Issued 244 PM CDT Fri Apr 17 2026
Saturday through Friday:
Gusty west-northwest winds up to 30 mph are expected behind the
cold front Saturday. Sunshine should be prevalent, although
cyclonic flow aloft will allow for some high-level diurnal
cumulus clouds. Saturday highs will only be in the 40s, a stark
contrast to the highs today. Lows Saturday night should dip
below freezing nearly everywhere except the immediate Lake
Michigan lakeshore.
The upper low will remain over Ontario Sunday and a shortwave
trough digging into central and southern WI may steepen lapse
rates enough to produce a few flurries. It looks like moisture
will be very limited with this feature, but the forcing is
certainly there. Highs Sunday will be similar to Saturday but
with slightly lighter northwest winds. Lows Sunday night have a
better chance of dropping below freezing, with lows forecast in
the 25 to 30 degree range.
As high pressure departs the Upper Great Lakes on Monday,
southerly winds will usher milder air back into southern WI.
The sunshine will also help temps get into the mid 50s inland
and lower 50s near the lakeshore. A clipper system will cross
Ontario and Lake Superior Monday night, but southern WI will
remain dry. However, this could push a cold front down Lake
Michigan Tuesday. Not all models have picked up on this
potential yet, so the forecast highs Tue are in the lower 70s
inland and mid 60s lakeshore. Lakeshore temps could end up being
colder, but the highs will depend on when that back door cold
front actually makes it onshore.
There will be a stark temp gradient across southern WI from
west to east on Wednesday as low pressure develops in the
Plains. It looks like the storms associated with the warm front
of this low will be over northeast MN and northern WI Thu. All
We should see temps get back into the upper 70s inland over
southern WI. The next potential for showers and thunderstorms,
potentially severe, looks like next week Friday.
Cronce
&&
.AVIATION...
Issued 1207 PM CDT Fri Apr 17 2026
See the main part of the discussion for thunderstorm chances.
Timing of the storms for southern WI looks earlier than
previously forecast. All severe hazards are possible.
A strong cold front will cross southern WI late tonight. Showers
and a few storms will remain possible until the front clears.
MVFR ceilings are expected behind the front on gusty WNW winds,
and IFR ceilings are possible for a few hours early Saturday
morning. Saturday ceilings should recover to VFR by mid/late
morning and probably scatter out.
Cronce
&&
.MARINE...
Issued 1207 PM CDT Fri Apr 17 2026
Winds will become southerly this morning as a surface low of 29.5
inches approaches from the central plains. Dense fog will
continue over the lake through this evening and likely during
the overnight hours until the cold front clears the lake. This
surface low will quickly move from Omaha to Duluth from this
morning into the afternoon. Winds will become gusty and
southeasterly tonight, and strong to severe storms will cross
the lake as a cold front sweeps through the area. Winds then
become northwesterly behind the cold front Saturday morning.
Breezy northwesterly winds then continue Saturday through Sunday
as the low then races northeast toward Hudson Bay. Winds ease
Monday morning as high pressure tracks southeast over the upper
Great Lakes.
Cronce
&&
.HYDROLOGY...
Issued 1207 PM CDT Fri Apr 17 2026
This afternoon / evening's convection is expected to produce an
additional 0.50 to 1.25 inches of rainfall across the region,
with locally higher totals up to 2.00 inches possible. Probs of
exceeding 2.00 are only 10% or less based off of most guidance.
Highest rainfall potential exists in the western half of the
CWA, given the potential for initial supercells with heavy rain
followed by additional showers / storms along the advancing cold
front (eg. multiple rounds of heavier precip). Further east,
still expecting a good burst of heavy rain from short line
segments or QLCS to be more progressive / fast- moving by that
time of day, but increased the storm total amounts toward an
inch.
Cronce/Sheppard
&&
.MKX WATCHES/WARNINGS/ADVISORIES...
WI...Flood Watch...WIZ046-WIZ047-WIZ051-WIZ052-WIZ056-WIZ057-WIZ058-
WIZ059-WIZ060-WIZ062-WIZ063-WIZ064-WIZ065-WIZ066-WIZ067-
WIZ068-WIZ069-WIZ070-WIZ071-WIZ072 until 7 AM Saturday.
LM...Dense Fog Advisory...LMZ080-LMZ261-LMZ362-LMZ364-LMZ366-LMZ563-
LMZ565-LMZ567-LMZ669-LMZ671-LMZ673-LMZ675-LMZ777-LMZ779-
LMZ868-LMZ870-LMZ872-LMZ874-LMZ876-LMZ878 until 4 AM
Saturday.
Small Craft Advisory...LMZ643-LMZ644-LMZ645-LMZ646 until 10 PM
Saturday.
&&
Visit us at weather.gov/milwaukee
Follow us on Facebook, X, and YouTube at:
www.facebook.com/NWSMilwaukee
www.x.com/NWSMilwaukee
www.youtube.com/NWSMilwaukeeHazardous weather outlook, Apr 17, 2:56 PM CDT, 3 hours 44 minutes before
Hazardous Weather Outlook National Weather Service Milwaukee/Sullivan WI 256 PM CDT Fri Apr 17 2026 WIZ046-047-051-052-056>060-062>072-182000- Marquette-Green Lake-Fond du Lac-Sheboygan-Sauk-Columbia-Dodge- Washington-Ozaukee-Iowa-Dane-Jefferson-Waukesha-Milwaukee- Lafayette-Green-Rock-Walworth-Racine-Kenosha- 256 PM CDT Fri Apr 17 2026 This Hazardous Weather Outlook is for portions of east central Wisconsin, south central Wisconsin and southeast Wisconsin. .DAY ONE...Rest of Today and Tonight Thunderstorms with higher-end severe potential and heavy rainfall is expected this afternoon and early evening. An Enhanced Risk (3 out of 5) for severe weather exists over the western half of the CWA. Heavy rain over saturated ground may lead to flash flooding. .DAYS TWO THROUGH SEVEN...Saturday through Friday No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation will be needed through tonight. LMZ643>646-182000- 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- 256 PM CDT Fri Apr 17 2026 This Hazardous Weather Outlook is for the nearshore waters from Sheboygan Wisconsin to Winthrop Harbor Illinois. .DAY ONE...Tonight Dense fog continues for the whole nearshore through the overnight hours. Small Craft Advisory in effect for high waves and strong southerly winds through tonight Thunderstorms are likely late afternoon and this evening, with severe storms possible. .DAYS TWO THROUGH SEVEN...Saturday through Friday Small Craft Advisory will continue through Saturday evening for breezy west to northwest winds. LMZ080-261-362-364-366-563-565-567-669-671-673-675-777-779-868- 870-872-874-876-878-182000- 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- 256 PM CDT Fri Apr 17 2026 This Hazardous Weather Outlook is for the open waters of Lake Michigan. .DAY ONE...Tonight A few southerly gale force gusts are possible through late evening. Dense fog continues through tonight. Thunderstorms are likely late afternoon and this evening, with severe storms possible. .DAYS TWO THROUGH SEVEN...Saturday through Friday No hazardous weather is expected at this time. MRC www.weather.gov/mkx
In the hours before
Local storm report, Apr 17, 6:07 PM CDT, 33 minutes before
Preliminary Local Storm Report
National Weather Service Milwaukee/Sullivan WI
607 PM CDT Fri Apr 17 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0605 PM Tornado 4 SE Janesville 42.65N 88.95W
04/17/2026 Rock WI Public
Multiple reports of a tornado on the ground.
&&
TPLocal storm report, Apr 17, 6:16 PM CDT, 24 minutes before
Preliminary Local Storm Report
National Weather Service Milwaukee/Sullivan WI
616 PM CDT Fri Apr 17 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0612 PM Hail 1 WSW Janesville 42.68N 89.03W
04/17/2026 E1.50 Inch Rock WI Public
Time estimated from radar.
&&
TPLocal storm report, Apr 17, 6:24 PM CDT, 16 minutes before
Preliminary Local Storm Report
National Weather Service Milwaukee/Sullivan WI
624 PM CDT Fri Apr 17 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0623 PM Hail Milton 42.78N 88.95W
04/17/2026 E1.75 Inch Rock WI Public
&&
TPLocal storm report, Apr 17, 6:27 PM CDT, 13 minutes before
Preliminary Local Storm Report
National Weather Service Milwaukee/Sullivan WI
627 PM CDT Fri Apr 17 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0609 PM Tornado 5 ENE Avalon 42.65N 88.78W
04/17/2026 Rock WI Public
Snapped and uprooted trees, damage to
houses, and sheet metal wrapped around trees
near Emerald Grove. Time estimated from
radar.
&&
TPLocal storm report, Apr 17, 6:33 PM CDT, 7 minutes before
Preliminary Local Storm Report
National Weather Service Milwaukee/Sullivan WI
633 PM CDT Fri Apr 17 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0609 PM Tornado 1 N Avalon 42.65N 88.87W
04/17/2026 Rock WI Public
Corrects previous tornado report from 5 ENE
Avalon. Snapped and uprooted trees, damage
to houses, and sheet metal wrapped around
trees near Emerald Grove. Time estimated
from radar.
&&
TPSpecial weather statement, Apr 17, 6:33 PM CDT, 7 minutes before
Special Weather Statement
National Weather Service Milwaukee/Sullivan WI
633 PM CDT Fri Apr 17 2026
WIZ051-052-059-060-180030-
Sheboygan WI-Washington WI-Ozaukee WI-Fond Du Lac WI-
633 PM CDT Fri Apr 17 2026
...STRONG THUNDERSTORMS WILL IMPACT OZAUKEE...SOUTHEASTERN FOND DU
LAC...WASHINGTON AND SHEBOYGAN COUNTIES THROUGH 730 PM CDT...
At 633 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Howards Grove to near Random Lake to near
Hartford. Movement was northeast at 45 mph.
HAZARD...Wind gusts up to 50 mph and pea 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, West Bend, Mequon, Hartford, Grafton, Cedarburg, Port
Washington, Plymouth, Sheboygan Falls, Jackson, Slinger, Saukville,
Kewaskum, Howards Grove, Germantown, Oostburg, Belgium, Fredonia,
Kohler, and Cedar Grove.
This includes the following highways...
Interstate 43 between mile markers 93 and 135.
Interstate 41 between mile markers 54 and 80.
U.S. Highway 45 between mile markers 61 and 73.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Frequent cloud to ground lightning is occurring with these storms.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
A Tornado Watch remains in effect until 800 PM CDT for southeastern
and east central Wisconsin.
&&
LAT...LON 4357 8779 4349 8779 4335 8788 4319 8816
4320 8842 4358 8839 4389 8806 4389 8774
4381 8773 4376 8770 4368 8770
TIME...MOT...LOC 2333Z 214DEG 37KT 4379 8789 4362 8796 4335 8836
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...50 MPH
WAGNERThe office that day
Everything else NWS Milwaukee, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 16, 9:55 PM CDT | Small Craft Advisory | MKX | 48 hr | |
| Apr 17, 10:40 AM CDT | River Flood Watch | MKX | Green Lake | 66 hr |
| Apr 17, 2:44 PM CDT | Severe Thunderstorm Warning | MKX | Sauk | 46 min |
| Apr 17, 2:58 PM CDT | Tornado Warning | MKX | Sauk | 21 min |
| Apr 17, 3:06 PM CDT | Special Weather Statement | MKX | Columbia | 39 min |
| Apr 17, 3:08 PM CDT | Special Weather Statement | MKX | Lafayette | 37 min |
| Apr 17, 3:12 PM CDT | Severe Thunderstorm Warning | MKX | Lafayette | 18 min |
| Apr 17, 3:17 PM CDT | Areal Flood Advisory | MKX | Lafayette | 43 min |
| Apr 17, 3:33 PM CDT | Severe Thunderstorm Warning | MKX | Green, Lafayette | 42 min |
| Apr 17, 3:39 PM CDT | Severe Thunderstorm Warning | MKX | Lafayette | 40 min |
| Apr 17, 4:00 PM CDT | Flash Flood Warning | MKX | Lafayette | 3 hr |
| Apr 17, 4:03 PM CDT | Tornado Warning | MKX | Green | 42 min |
| Apr 17, 4:07 PM CDT | Severe Thunderstorm Warning | MKX | Dane, Green, Iowa, Lafayette | 38 min |
| Apr 17, 4:16 PM CDT | Severe Thunderstorm Warning | MKX | Green, Lafayette | 29 min |
| Apr 17, 4:24 PM CDT | Severe Thunderstorm Warning | MKX | Columbia, Dane, Green Lake, Iowa, Sauk | 66 min |
| Apr 17, 4:25 PM CDT | Severe Thunderstorm Warning | MKX | Rock | 65 min |
| Apr 17, 4:27 PM CDT | Areal Flood Advisory | MKX | Dane, Green, Lafayette, Rock | 3 hr |
| Apr 17, 4:27 PM CDT | Tornado Warning | MKX | Dodge | 13 min |
| Apr 17, 4:32 PM CDT | Severe Thunderstorm Warning | MKX | Dane, Jefferson | 43 min |
| Apr 17, 4:37 PM CDT | Severe Thunderstorm Warning | MKX | Iowa | 38 min |
| Apr 17, 4:40 PM CDT | Severe Thunderstorm Warning | MKX | Dane, Green, Rock | 50 min |
| Apr 17, 4:47 PM CDT | Severe Thunderstorm Warning | MKX | Dane, Green, Iowa, Lafayette | 22 min |
| Apr 17, 4:52 PM CDT | Areal Flood Advisory | MKX | Dane, Iowa | 3 hr |
| Apr 17, 5:09 PM CDT | Severe Thunderstorm Warning | MKX | Dane | 36 min |
| Apr 17, 5:09 PM CDT | Severe Thunderstorm Warning | MKX | Iowa | 51 min |
| Apr 17, 5:12 PM CDT | Tornado Warning | MKX | Rock | 48 min |
| Apr 17, 5:15 PM CDT | Flash Flood Warning | MKX | Green, Lafayette | 4 hr |
| Apr 17, 5:16 PM CDT | Severe Thunderstorm Warning | MKX | Dodge, Jefferson | 59 min |
| Apr 17, 5:19 PM CDT | Flash Flood Warning | MKX | Iowa | 3 hr |
| Apr 17, 5:19 PM CDT | Severe Thunderstorm Warning | MKX | Dane | 41 min |
| Apr 17, 5:25 PM CDT | Severe Thunderstorm Warning | MKX | Dane, Green, Jefferson, Rock, Walworth, Waukesha | 65 min |
| Apr 17, 5:33 PM CDT | Severe Thunderstorm Warning | MKX | Rock, Walworth | 42 min |
| Apr 17, 5:34 PM CDT | Severe Thunderstorm Warning | MKX | Lafayette | 41 min |
| Apr 17, 5:38 PM CDT | Tornado Warning | MKX | Rock | 52 min |
| Apr 17, 5:46 PM CDT | Areal Flood Advisory | MKX | Rock, Walworth | 5 hr |
| Apr 17, 5:48 PM CDT | Severe Thunderstorm Warning | MKX | Fond du Lac, Sheboygan, Washington | 42 min |
| Apr 17, 5:54 PM CDT | Areal Flood Advisory | MKX | Columbia, Dane, Dodge, Jefferson, Washington | 3 hr |
| Apr 17, 5:54 PM CDT | Severe Thunderstorm Warning | MKX | Dodge, Washington | 51 min |
| Apr 17, 5:54 PM CDT | Severe Thunderstorm Warning | MKX | Dane, Green, Iowa | 38 min |
| Apr 17, 6:05 PM CDT | Tornado Warning | MKX | Dane | 40 min |
| Apr 17, 6:05 PM CDT | Tornado Warning | MKX | Jefferson, Rock, Waukesha | 25 min |
| Apr 17, 6:08 PM CDT | Flash Flood Warning | MKX | Green, Rock | 3 hr |
| Apr 17, 6:09 PM CDT | Special Marine Warning | MKX | 3 hr | |
| Apr 17, 6:17 PM CDT | Tornado Warning | MKX | Walworth | 28 min |
| Apr 17, 6:24 PM CDT | Severe Thunderstorm Warning | MKX | Dane, Green, Jefferson, Rock | 32 min |
| Apr 17, 6:26 PM CDT | Severe Thunderstorm Warning | MKX | Dane, Jefferson, Rock, Walworth, Waukesha | 64 min |
| Apr 17, 6:28 PM CDT | Severe Thunderstorm Warning | MKX | Green | 28 min |
| Apr 17, 6:30 PM CDT | Tornado Warning | MKX | Rock | 14 min |
| Apr 17, 6:33 PM CDT | Special Weather Statement | MKX | Ozaukee, Sheboygan, Washington | 57 min |
| Apr 17, 6:34 PM CDT | Flash Flood Warning | MKX | Rock | 3 hr |
| Apr 17, 6:37 PM CDT | Areal Flood Advisory | MKX | Dodge, Fond du Lac, Sheboygan, Washington | 3 hr |
| Apr 17, 6:39 PM CDT | Severe Thunderstorm Warning | MKX | Fond du Lac, Ozaukee, Sheboygan, Washington | 51 min |
| Apr 17, 6:45 PM CDT | Tornado Warning | MKX | Dane, Dodge, Jefferson | 13 min |
| Apr 17, 6:47 PM CDT | Areal Flood Advisory | MKX | Dane, Jefferson, Milwaukee, Racine, Waukesha | 3 hr |
| Apr 17, 6:51 PM CDT | Tornado Warning | MKX | Walworth | 24 min |
| Apr 17, 6:52 PM CDT | Special Marine Warning | MKX | 3 hr |
Nearby
Tornado Warnings in Wisconsin, 2026Every tornado warning in 2026Tornadoes in 2026
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.