Alert archive / Wisconsin / Tornado Warnings in 2026
Tornado Warning 41, NWS Milwaukee, WI
NWS Milwaukee, WI issued this tornado warning at Apr 17, 2026, 6:45 PM CDT for Dane County, Dodge County, Jefferson County, Wisconsin. It was in force for 13 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Apr 17, 2026, 6:45 PM CDT (23:45 UTC)
- Expired
- Apr 17, 2026, 6:58 PM CDT
- In force
- 13 min
- Issued by
- NWS Milwaukee, WI
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 0.75 in
Counties Dane County, WI, Dodge County, WI, Jefferson County, WI
The radar
The Milwaukee radar (KMKX), 37 km from the middle of the area, began a volume at 23:49 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.
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, 11.8 hours before the alert went out and 340 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.
050
WFUS53 KMKX 172345
TORMKX
WIC025-027-055-180030-
/O.NEW.KMKX.TO.W.0041.260417T2345Z-260418T0030Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Milwaukee/Sullivan WI
645 PM CDT Fri Apr 17 2026
The National Weather Service in Milwaukee/Sullivan has issued a
* Tornado Warning for...
East central Dane County in south central Wisconsin...
Northwestern Jefferson County in southeastern Wisconsin...
Southwestern Dodge County in southeastern Wisconsin...
* Until 730 PM CDT.
* At 644 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Waterloo, moving east at 30 mph.
HAZARD...Tornado.
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...
Waterloo around 650 PM CDT.
Watertown around 655 PM CDT.
Other locations impacted by this tornadic thunderstorm include
Lebanon, Hubbleton, Clyman, Reeseville, and Richwood.
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 4310 8905 4320 8909 4339 8867 4320 8854
TIME...MOT...LOC 2344Z 250DEG 26KT 4317 8900
TORNADO...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
$$
HEEREN2 follow-up statements
491
WWUS53 KMKX 172355
SVSMKX
Severe Weather Statement
National Weather Service Milwaukee/Sullivan WI
655 PM CDT Fri Apr 17 2026
WIC025-180005-
/O.CAN.KMKX.TO.W.0041.000000T0000Z-260418T0030Z/
Dane WI-
655 PM CDT Fri Apr 17 2026
...THE TORNADO WARNING FOR EAST CENTRAL DANE COUNTY IS CANCELLED...
The tornadic thunderstorm which prompted the warning has moved out
of the warned area. Therefore, the warning has been cancelled.
A Tornado Watch remains in effect until 800 PM CDT for southeastern
Wisconsin.
&&
LAT...LON 4315 8896 4324 8900 4339 8867 4320 8854
TIME...MOT...LOC 2355Z 250DEG 26KT 4320 8889
$$
WIC027-055-180030-
/O.CON.KMKX.TO.W.0041.000000T0000Z-260418T0030Z/
Jefferson WI-Dodge WI-
655 PM CDT Fri Apr 17 2026
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 730 PM CDT FOR
NORTHWESTERN JEFFERSON AND SOUTHWESTERN DODGE COUNTIES...
At 655 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Waterloo, moving east at 30 mph.
HAZARD...Tornado.
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...
Watertown around 700 PM CDT.
Other locations impacted by this tornadic thunderstorm include
Lebanon, Hubbleton, Clyman, Reeseville, and Richwood.
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 4315 8896 4324 8900 4339 8867 4320 8854
TIME...MOT...LOC 2355Z 250DEG 26KT 4320 8889
TORNADO...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
$$
HEEREN850 WWUS53 KMKX 172358 SVSMKX Severe Weather Statement National Weather Service Milwaukee/Sullivan WI 658 PM CDT Fri Apr 17 2026 WIC027-055-180008- /O.CAN.KMKX.TO.W.0041.000000T0000Z-260418T0030Z/ Jefferson WI-Dodge WI- 658 PM CDT Fri Apr 17 2026 ...THE TORNADO WARNING FOR NORTHWESTERN JEFFERSON AND SOUTHWESTERN DODGE COUNTIES IS CANCELLED... The storm which prompted the warning has weakened below severe limits, and no longer appears capable of producing a tornado. Therefore, the warning has been cancelled. A Tornado Watch remains in effect until 800 PM CDT for southeastern Wisconsin. && LAT...LON 4315 8896 4324 8900 4339 8867 4320 8854 TIME...MOT...LOC 2356Z 250DEG 26KT 4321 8886 $$ HEEREN
The 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, 6:40 PM CDT | Tornado Warning | MKX | Walworth | 35 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.