Alert archive / Wisconsin / Tornado Warnings in 2026
Tornado Warning 4, NWS Milwaukee, WI
NWS Milwaukee, WI issued this tornado warning at Apr 2, 2026, 6:58 PM CDT for Rock County, Wisconsin. It was in force for 23 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 2, 2026, 6:58 PM CDT (23:58 UTC)
- Expired
- Apr 2, 2026, 7:21 PM CDT
- In force
- 23 min
- Issued by
- NWS Milwaukee, WI
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 1.0 in
County Rock County, WI
The radar
The Milwaukee radar (KMKX), 51 km from the middle of the area, began a volume at 00:04 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 2, 7:07 PM CDT | HAIL 0.88 | 3 Nnw Janesville, WI |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
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 2, 1:43 PM CDT | Tornado Watch | SPC | 8 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 12.0 hours before the alert went out and 287 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
- 19 J/kg
- Mixed-layer CIN
- -278 J/kg
- Mixed-layer LCL
- 846 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- 453 m²/s²
- 0-3 km storm-relative helicity
- 450 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
703
WFUS53 KMKX 022358
TORMKX
WIC105-030045-
/O.NEW.KMKX.TO.W.0004.260402T2358Z-260403T0045Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Milwaukee/Sullivan WI
658 PM CDT Thu Apr 2 2026
The National Weather Service in Milwaukee/Sullivan has issued a
* Tornado Warning for...
Northwestern Rock County in south central Wisconsin...
* Until 745 PM CDT.
* At 658 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Footville, or 9 miles west of Janesville, moving
northeast at 35 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...
Janesville and Edgerton around 705 PM CDT.
Milton around 710 PM CDT.
Other locations impacted by this tornadic thunderstorm include
Fulton, Hanover, Indianford, Lima Center, and Leyden.
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 4263 8930 4285 8911 4284 8877 4276 8878
4255 8919
TIME...MOT...LOC 2358Z 224DEG 32KT 4265 8918
TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
$$
PATTERSON4 follow-up statements
041
WWUS53 KMKX 030000
SVSMKX
Severe Weather Statement
National Weather Service Milwaukee/Sullivan WI
700 PM CDT Thu Apr 2 2026
WIC105-030045-
/O.CON.KMKX.TO.W.0004.000000T0000Z-260403T0045Z/
Rock WI-
700 PM CDT Thu Apr 2 2026
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 745 PM CDT FOR
NORTHWESTERN ROCK COUNTY...
At 700 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Footville, or 7 miles west of Janesville, moving
northeast at 35 mph.
HAZARD...Tornado and quarter size hail.
SOURCE...Weather spotters reported a funnel cloud near Footville.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
This dangerous storm will be near...
Janesville and Edgerton around 705 PM CDT.
Milton around 710 PM CDT.
Other locations impacted by this tornadic thunderstorm include
Fulton, Hanover, Indianford, Lima Center, and Leyden.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 4263 8930 4285 8911 4284 8877 4276 8878
4255 8919
TIME...MOT...LOC 0000Z 224DEG 32KT 4266 8916
TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
$$
PATTERSON451
WWUS53 KMKX 030006
SVSMKX
Severe Weather Statement
National Weather Service Milwaukee/Sullivan WI
706 PM CDT Thu Apr 2 2026
WIC105-030045-
/O.CON.KMKX.TO.W.0004.000000T0000Z-260403T0045Z/
Rock WI-
706 PM CDT Thu Apr 2 2026
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 745 PM CDT FOR
NORTHEASTERN ROCK COUNTY...
At 705 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Janesville, moving northeast at 35 mph.
HAZARD...Tornado and quarter size hail.
SOURCE...Weather spotters reported a funnel cloud.
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...
Janesville, Milton, and Edgerton around 710 PM CDT.
Other locations impacted by this tornadic thunderstorm include
Fulton, Indianford, Lima Center, and Leyden.
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 4271 8918 4285 8911 4284 8877 4276 8878
4260 8910
TIME...MOT...LOC 0005Z 224DEG 32KT 4270 8911
TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
$$
PATTERSON851
WWUS53 KMKX 030012
SVSMKX
Severe Weather Statement
National Weather Service Milwaukee/Sullivan WI
712 PM CDT Thu Apr 2 2026
WIC105-030045-
/O.CON.KMKX.TO.W.0004.000000T0000Z-260403T0045Z/
Rock WI-
712 PM CDT Thu Apr 2 2026
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 745 PM CDT FOR
NORTHEASTERN ROCK COUNTY...
At 712 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Janesville, moving northeast at 35 mph.
HAZARD...Tornado and quarter size hail.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
This dangerous storm will be near...
Janesville, Milton, and Edgerton around 715 PM CDT.
Other locations impacted by this tornadic thunderstorm include Lima
Center.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 4279 8906 4285 8911 4284 8877 4276 8878
4267 8895
TIME...MOT...LOC 0012Z 224DEG 32KT 4275 8905
TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
$$
PATTERSON165
WWUS53 KMKX 030021
SVSMKX
Severe Weather Statement
National Weather Service Milwaukee/Sullivan WI
721 PM CDT Thu Apr 2 2026
WIC105-030031-
/O.CAN.KMKX.TO.W.0004.000000T0000Z-260403T0045Z/
Rock WI-
721 PM CDT Thu Apr 2 2026
...THE TORNADO WARNING FOR NORTHEASTERN 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 1100 PM CDT for south central
and southeastern Wisconsin.
&&
LAT...LON 4279 8906 4285 8911 4284 8877 4276 8878
4267 8895
TIME...MOT...LOC 0018Z 224DEG 32KT 4281 8897
$$
PATTERSONThe office that day
Everything else NWS Milwaukee, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 2, 11:46 AM CDT | River Flood Watch | MKX | Kenosha | 24 hr |
| Apr 2, 12:52 PM CDT | Marine Dense Fog Advisory | MKX | 6 hr | |
| Apr 2, 5:48 PM CDT | Severe Thunderstorm Warning | MKX | Rock | 57 min |
| Apr 2, 5:58 PM CDT | Severe Thunderstorm Warning | MKX | Iowa, Lafayette | 47 min |
| Apr 2, 6:03 PM CDT | Tornado Warning | MKX | Jefferson, Rock | 42 min |
| Apr 2, 6:07 PM CDT | Tornado Warning | MKX | Rock | 38 min |
| Apr 2, 6:15 PM CDT | Severe Thunderstorm Warning | MKX | Green, Lafayette | 30 min |
| Apr 2, 6:35 PM CDT | Severe Thunderstorm Warning | MKX | Dane, Green, Iowa | 40 min |
| Apr 2, 6:39 PM CDT | Tornado Warning | MKX | Jefferson, Rock, Walworth | 30 min |
| Apr 2, 6:43 PM CDT | Severe Thunderstorm Warning | MKX | Dane, Green, Jefferson, Rock | 32 min |
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.