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Home Return to list Severe Thunderstorm Warning 0119 Issued by the Milwaukee / Sullivan Forecast Office
Action: New Issued At: 2026-05-17 11:13:20 000 WUUS53 KMKX 171612 SVRMKX WIC021-025-049-111-171715- /O.NEW.KMKX.SV.W.0119.260517T1612Z-260517T1715Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Milwaukee/Sullivan WI 1112 AM CDT Sun May 17 2026 The National Weather Service in Milwaukee/Sullivan has issued a * Severe Thunderstorm Warning for... Northeastern Iowa County in south central Wisconsin... Southwestern Columbia County in south central Wisconsin... Northwestern Dane County in south central Wisconsin... Southeastern Sauk County in south central Wisconsin... * Until 1215 PM CDT. * At 1112 AM CDT, a severe thunderstorm was located near Mazomanie, or 12 miles southwest of Sauk City, moving east at 30 mph. HAZARD...60 mph wind gusts and penny size hail. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. * Locations impacted include... Madison, Middleton, Waunakee, Prairie Du Sac, Sauk City, Lake Wisconsin, Cross Plains, Lodi, Poynette, Mazomanie, Spring Green, Black Earth, Barneveld, Dane, Blue Mounds, Arena, Ridgeway, Blue Mound St Park, Okee, and Marxville. Other landmarks included are the following Locations Gibraltar Rock Natural Area County Park and Hydes Mill. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && LAT...LON 4298 9001 4323 9008 4341 8939 4313 8937 TIME...MOT...LOC 1612Z 257DEG 24KT 4315 8990 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...0.75 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...60 MPH $$ MRC Action: Continued Issued At: 2026-05-17 11:24:21
290
WWUS53 KMKX 171623
SVSMKX
Severe Weather Statement
National Weather Service Milwaukee/Sullivan WI
1123 AM CDT Sun May 17 2026
WIC049-171633-
/O.CAN.KMKX.SV.W.0119.000000T0000Z-260517T1715Z/
Iowa WI-
1123 AM CDT Sun May 17 2026
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN IOWA COUNTY IS
CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
&&
LAT...LON 4341 8939 4313 8937 4302 8983 4320 8984
4319 8986 4319 8988 4328 8989
TIME...MOT...LOC 1623Z 257DEG 24KT 4317 8980
$$
WIC021-025-111-171715-
/O.CON.KMKX.SV.W.0119.000000T0000Z-260517T1715Z/
Columbia WI-Dane WI-Sauk WI-
1123 AM CDT Sun May 17 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1215 PM CDT
FOR SOUTHWESTERN COLUMBIA...NORTHWESTERN DANE AND SOUTHEASTERN SAUK
COUNTIES...
At 1123 AM CDT, a severe thunderstorm was located over Mazomanie, or
8 miles southwest of Sauk City, moving east at 30 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Madison, Middleton, Waunakee, Prairie Du Sac, Sauk City, Lake
Wisconsin, Cross Plains, Lodi, Poynette, Mazomanie, Black Earth,
Dane, Blue Mounds, Okee, Marxville, and Pine Bluff.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4341 8939 4313 8937 4302 8983 4320 8984
4319 8986 4319 8988 4328 8989
TIME...MOT...LOC 1623Z 257DEG 24KT 4317 8980
TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
MRC
Action: Cancelled Issued At: 2026-05-17 11:24:21
290
WWUS53 KMKX 171623
SVSMKX
Severe Weather Statement
National Weather Service Milwaukee/Sullivan WI
1123 AM CDT Sun May 17 2026
WIC049-171633-
/O.CAN.KMKX.SV.W.0119.000000T0000Z-260517T1715Z/
Iowa WI-
1123 AM CDT Sun May 17 2026
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN IOWA COUNTY IS
CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
&&
LAT...LON 4341 8939 4313 8937 4302 8983 4320 8984
4319 8986 4319 8988 4328 8989
TIME...MOT...LOC 1623Z 257DEG 24KT 4317 8980
$$
WIC021-025-111-171715-
/O.CON.KMKX.SV.W.0119.000000T0000Z-260517T1715Z/
Columbia WI-Dane WI-Sauk WI-
1123 AM CDT Sun May 17 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1215 PM CDT
FOR SOUTHWESTERN COLUMBIA...NORTHWESTERN DANE AND SOUTHEASTERN SAUK
COUNTIES...
At 1123 AM CDT, a severe thunderstorm was located over Mazomanie, or
8 miles southwest of Sauk City, moving east at 30 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Madison, Middleton, Waunakee, Prairie Du Sac, Sauk City, Lake
Wisconsin, Cross Plains, Lodi, Poynette, Mazomanie, Black Earth,
Dane, Blue Mounds, Okee, Marxville, and Pine Bluff.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4341 8939 4313 8937 4302 8983 4320 8984
4319 8986 4319 8988 4328 8989
TIME...MOT...LOC 1623Z 257DEG 24KT 4317 8980
TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
MRC
Action: Continued Issued At: 2026-05-17 11:39:51
603
WWUS53 KMKX 171639
SVSMKX
Severe Weather Statement
National Weather Service Milwaukee/Sullivan WI
1139 AM CDT Sun May 17 2026
WIC111-171649-
/O.CAN.KMKX.SV.W.0119.000000T0000Z-260517T1715Z/
Sauk WI-
1139 AM CDT Sun May 17 2026
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN SAUK COUNTY IS
CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
&&
LAT...LON 4341 8939 4313 8937 4308 8966 4319 8971
4332 8971
TIME...MOT...LOC 1639Z 257DEG 24KT 4319 8966
$$
WIC021-025-171715-
/O.CON.KMKX.SV.W.0119.000000T0000Z-260517T1715Z/
Columbia WI-Dane WI-
1139 AM CDT Sun May 17 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1215 PM CDT
FOR SOUTHWESTERN COLUMBIA AND NORTHWESTERN DANE COUNTIES...
At 1139 AM CDT, a severe thunderstorm was located near Cross Plains,
or near Sauk City, moving east at 30 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Madison, Middleton, Waunakee, Lake Wisconsin, Cross Plains, Lodi,
Poynette, Dane, and Marxville.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4341 8939 4313 8937 4308 8966 4319 8971
4332 8971
TIME...MOT...LOC 1639Z 257DEG 24KT 4319 8966
TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
MRC
Action: Cancelled Issued At: 2026-05-17 11:39:51
603
WWUS53 KMKX 171639
SVSMKX
Severe Weather Statement
National Weather Service Milwaukee/Sullivan WI
1139 AM CDT Sun May 17 2026
WIC111-171649-
/O.CAN.KMKX.SV.W.0119.000000T0000Z-260517T1715Z/
Sauk WI-
1139 AM CDT Sun May 17 2026
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN SAUK COUNTY IS
CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
&&
LAT...LON 4341 8939 4313 8937 4308 8966 4319 8971
4332 8971
TIME...MOT...LOC 1639Z 257DEG 24KT 4319 8966
$$
WIC021-025-171715-
/O.CON.KMKX.SV.W.0119.000000T0000Z-260517T1715Z/
Columbia WI-Dane WI-
1139 AM CDT Sun May 17 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1215 PM CDT
FOR SOUTHWESTERN COLUMBIA AND NORTHWESTERN DANE COUNTIES...
At 1139 AM CDT, a severe thunderstorm was located near Cross Plains,
or near Sauk City, moving east at 30 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Madison, Middleton, Waunakee, Lake Wisconsin, Cross Plains, Lodi,
Poynette, Dane, and Marxville.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4341 8939 4313 8937 4308 8966 4319 8971
4332 8971
TIME...MOT...LOC 1639Z 257DEG 24KT 4319 8966
TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
MRC
Action: Cancelled Issued At: 2026-05-17 11:50:51
919
WWUS53 KMKX 171650
SVSMKX
Severe Weather Statement
National Weather Service Milwaukee/Sullivan WI
1150 AM CDT Sun May 17 2026
WIC021-025-171700-
/O.CAN.KMKX.SV.W.0119.000000T0000Z-260517T1715Z/
Columbia WI-Dane WI-
1150 AM CDT Sun May 17 2026
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN COLUMBIA AND
NORTHWESTERN DANE COUNTIES IS CANCELLED...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled.
&&
LAT...LON 4341 8939 4313 8937 4308 8966 4319 8971
4332 8971
TIME...MOT...LOC 1649Z 257DEG 24KT 4321 8956
$$
MRC
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