Alert archive / Wisconsin / Tornado Warnings in 2026
Tornado Warning 64, NWS Milwaukee, WI
NWS Milwaukee, WI issued this tornado warning at Jun 17, 2026, 8:32 PM CDT for Walworth County, Wisconsin. It was in force for 28 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
- Jun 17, 2026, 8:32 PM CDT (01:32 UTC)
- Expired
- Jun 17, 2026, 9:00 PM CDT
- In force
- 28 min
- Issued by
- NWS Milwaukee, WI
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 0.75 in
County Walworth County, WI
The radar
The Milwaukee radar (KMKX), 50 km from the middle of the area, began a volume at 01:32 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 |
|---|---|---|---|
| Jun 17, 5:36 PM CDT | Tornado Watch | SPC | 3 hr |
The nearest sounding before it
Davenport, (KDVN), launched 00:00Z, 1.5 hours before the alert went out and 184 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
- 183 J/kg
- Mixed-layer CIN
- -46 J/kg
- Mixed-layer LCL
- 867 m above ground
- 0-6 km bulk shear
- 77 kt
- 0-1 km storm-relative helicity
- -108 m²/s²
- 0-3 km storm-relative helicity
- -24 m²/s²
- Significant tornado parameter
- -0.1
- Supercell composite
- -1.6
The text
As transmitted.
590
WFUS53 KMKX 180132
TORMKX
WIC127-180200-
/O.NEW.KMKX.TO.W.0064.260618T0132Z-260618T0200Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Milwaukee/Sullivan WI
832 PM CDT Wed Jun 17 2026
The National Weather Service in Milwaukee/Sullivan has issued a
* Tornado Warning for...
Southwestern Walworth County in southeastern Wisconsin...
* Until 900 PM CDT.
* At 832 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Sharon, or near Delavan, moving east at 35 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...
Walworth and Fontana-On-Geneva Lake around 835 PM CDT.
Other locations impacted by this tornadic thunderstorm include
Delavan Lake.
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 4254 8877 4259 8867 4250 8842 4249 8842
4249 8871
TIME...MOT...LOC 0132Z 286DEG 31KT 4254 8869
TORNADO...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
$$
GAGAN3 follow-up statements
504
WWUS53 KMKX 180138
SVSMKX
Severe Weather Statement
National Weather Service Milwaukee/Sullivan WI
838 PM CDT Wed Jun 17 2026
WIC127-180200-
/O.CON.KMKX.TO.W.0064.000000T0000Z-260618T0200Z/
Walworth WI-
838 PM CDT Wed Jun 17 2026
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 900 PM CDT FOR
SOUTHWESTERN WALWORTH COUNTY...
At 837 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Walworth, or near Williams Bay, moving east at 35
mph.
HAZARD...Tornado.
SOURCE...Weather spotters reported a funnel cloud.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
This dangerous storm will be near...
Fontana-On-Geneva Lake around 845 PM CDT.
Other locations impacted by this tornadic thunderstorm include
Delavan Lake.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 4254 8877 4259 8867 4250 8842 4249 8842
4249 8871
TIME...MOT...LOC 0137Z 286DEG 31KT 4253 8862
TORNADO...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
$$
GAGAN603
WWUS53 KMKX 180145
SVSMKX
Severe Weather Statement
National Weather Service Milwaukee/Sullivan WI
845 PM CDT Wed Jun 17 2026
WIC127-180200-
/O.CON.KMKX.TO.W.0064.000000T0000Z-260618T0200Z/
Walworth WI-
845 PM CDT Wed Jun 17 2026
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 900 PM CDT FOR SOUTH
CENTRAL WALWORTH COUNTY...
At 844 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Fontana-On-Geneva Lake, or near Williams Bay, moving
east at 40 mph.
HAZARD...Tornado.
SOURCE...Weather spotters reported a funnel cloud near the city of
Walworth.
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
south central Walworth County.
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 4250 8842 4249 8842 4249 8864 4255 8857
TIME...MOT...LOC 0144Z 290DEG 35KT 4250 8854
TORNADO...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
$$
GAGAN599 WWUS53 KMKX 180155 SVSMKX Severe Weather Statement National Weather Service Milwaukee/Sullivan WI 855 PM CDT Wed Jun 17 2026 WIC127-180205- /O.EXP.KMKX.TO.W.0064.000000T0000Z-260618T0200Z/ Walworth WI- 855 PM CDT Wed Jun 17 2026 ...THE TORNADO WARNING FOR SOUTH CENTRAL WALWORTH COUNTY WILL EXPIRE AT 900 PM CDT... The storm which prompted the warning has moved out of the area. Therefore, the warning will be allowed to expire. && LAT...LON 4250 8842 4249 8842 4249 8864 4255 8857 TIME...MOT...LOC 0155Z 286DEG 31KT 4248 8844 $$ GAGAN
The office that day
Everything else NWS Milwaukee, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 17, 7:10 PM CDT | Tornado Warning | MKX | Dane, Green, Rock | 50 min |
| Jun 17, 7:19 PM CDT | Severe Thunderstorm Warning | MKX | Green, Lafayette, Rock | 56 min |
| Jun 17, 7:23 PM CDT | Severe Thunderstorm Warning | MKX | Jefferson | 37 min |
| Jun 17, 7:32 PM CDT | Severe Thunderstorm Warning | MKX | Rock, Walworth | 73 min |
| Jun 17, 7:43 PM CDT | Tornado Warning | MKX | Rock | 47 min |
| Jun 17, 7:49 PM CDT | Severe Thunderstorm Warning | MKX | Waukesha | 56 min |
| Jun 17, 8:09 PM CDT | Severe Thunderstorm Warning | MKX | Rock | 36 min |
| Jun 17, 8:23 PM CDT | Special Weather Statement | MKX | Kenosha | 37 min |
| Jun 17, 8:41 PM CDT | Severe Thunderstorm Warning | MKX | Kenosha, Walworth | 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.