Alert archive / Wisconsin / Special Marine Warnings in 2026

Special Marine Warning 21, NWS Milwaukee, WI

April 21, 2026

NWS Milwaukee, WI issued this special marine warning at Apr 21, 2026, 12:45 PM CDT. It was in force for 45 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Apr 21, 2026, 12:45 PM CDT (17:45 UTC)
Expired
Apr 21, 2026, 1:30 PM CDT
In force
45 min
Issued by
NWS Milwaukee, WI
Area
Storm-based polygon
Hail
0.75 in
Wind
34.0 mph

The office that day

Everything else NWS Milwaukee, WI issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 20, 9:26 PM CDTRiver Flood WarningMKXRacine21 days
Apr 21, 11:18 AM CDTSpecial Weather StatementMKXWaukesha27 min
Apr 21, 11:29 AM CDTSpecial Weather StatementMKXWaukesha31 min
Apr 21, 12:03 PM CDTSpecial Weather StatementMKXMilwaukee27 min
Apr 21, 12:24 PM CDTSpecial Marine WarningMKX36 min
Apr 21, 12:25 PM CDTSevere Thunderstorm WarningMKXMilwaukee7 min
Apr 21, 12:42 PM CDTSpecial Weather StatementMKXRacine48 min
Apr 21, 12:44 PM CDTSevere Thunderstorm WarningMKXRacine46 min
Apr 21, 1:12 PM CDTSpecial Marine WarningMKX48 min
Apr 21, 2:09 PM CDTSpecial Marine WarningMKX21 min

Nearby

Special Marine Warnings in Wisconsin, 2026Every special marine warning 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.