Alert archive / Wisconsin / Tornado Warnings in 2026
Tornado Warning 39, NWS Milwaukee, WI
NWS Milwaukee, WI issued this tornado warning at Apr 17, 2026, 6:30 PM CDT for Rock County, Wisconsin. It was in force for 14 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, 6:30 PM CDT (23:30 UTC)
- Expired
- Apr 17, 2026, 6:44 PM CDT
- In force
- 14 min
- Issued by
- NWS Milwaukee, WI
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 0.75 in
County Rock County, WI
The radar
The Milwaukee radar (KMKX), 44 km from the middle of the area, began a volume at 23:30 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, 11.5 hours before the alert went out and 278 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.
009
WFUS53 KMKX 172330
TORMKX
WIC105-180000-
/O.NEW.KMKX.TO.W.0039.260417T2330Z-260418T0000Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Milwaukee/Sullivan WI
630 PM CDT Fri Apr 17 2026
The National Weather Service in Milwaukee/Sullivan has issued a
* Tornado Warning for...
East central Rock County in south central Wisconsin...
* Until 700 PM CDT.
* At 630 PM CDT, a severe thunderstorm capable of producing a tornado
was located 7 miles northwest of Darien, or 9 miles east of
Janesville, moving northeast 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 tornadic thunderstorm will remain over mainly rural areas of
east central Rock County, including the following locations...
Avalon, Johnstown Center, and Emerald Grove.
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 4259 8888 4267 8893 4276 8878 4261 8878
TIME...MOT...LOC 2330Z 237DEG 27KT 4267 8883
TORNADO...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
$$
CMILLER1 follow-up statement
532 WWUS53 KMKX 172344 SVSMKX Severe Weather Statement National Weather Service Milwaukee/Sullivan WI 644 PM CDT Fri Apr 17 2026 WIC105-172354- /O.CAN.KMKX.TO.W.0039.000000T0000Z-260418T0000Z/ Rock WI- 644 PM CDT Fri Apr 17 2026 ...THE TORNADO WARNING FOR EAST CENTRAL ROCK COUNTY IS CANCELLED... The storm which prompted the warning has moved out of the area. Therefore, the warning has been cancelled. A Tornado Watch remains in effect until 800 PM CDT for south central Wisconsin. && LAT...LON 4259 8888 4267 8893 4276 8878 4261 8878 TIME...MOT...LOC 2343Z 237DEG 27KT 4273 8870 $$ CMILLER
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, 6:33 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, 6:45 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.