US National Weather Service Milwaukee/Sullivan Wisconsin

US National Weather Service Milwaukee/Sullivan Wisconsin Official page for the National Weather Service Milwaukee/Sullivan WI. Details: weather.gov/facebook

Partly to mostly cloudy skies tonight with a slight chance for early evening shower. Chances for storms Tuesday through ...
08/31/2026

Partly to mostly cloudy skies tonight with a slight chance for early evening shower. Chances for storms Tuesday through Thursday with the best chances coming Thursday. Tuesday and Wednesday will be hot and humid with near Heat Advisory conditions.

Hot and humid conditions expected early this week, with off and on rounds of showers and thunderstorms. For the afternoo...
08/30/2026

Hot and humid conditions expected early this week, with off and on rounds of showers and thunderstorms. For the afternoon hours of each day, an isolated stronger storm (if present) could be capable of small hail and gusty winds.

Showers taper off this evening, with on-and-off thunderstorms developing late tonight and continuing through Monday. Dur...
08/29/2026

Showers taper off this evening, with on-and-off thunderstorms developing late tonight and continuing through Monday. During the afternoon Sunday & Monday, isolated storms may produce small hail/gusty winds. Heat index values reach the upper 90s by Tuesday.

2026 Wisconsin Tornado Count Update: NWS Green Bay updated some information from the 7/20 and 7/27 tornadoes. An EF-U wa...
08/28/2026

2026 Wisconsin Tornado Count Update: NWS Green Bay updated some information from the 7/20 and 7/27 tornadoes. An EF-U was added in Marathon county from storm chaser video. The EF-U in Marathon County was upped to an EF-0 due to damage found at the WI Farm Tech Days. The path info from the 7-27 EF-3 was updated as well. NWS Milwaukee added an EF-0 in Washington county from storms on 8/18. The 48 documented tornadoes occurring in Wisconsin this year make it the 2nd most on record going back to 1950 with 2005 (62) being first. 4 EF-3s, 2 EF-2s, 21 EF1s, 18 EF0s and 3 EF Unknown (U) level tornadoes have been documented across the state. On average, Wisconsin has 23 tornadoes that occur throughout the full year. https://www.weather.gov/mkx/wisconsintornadoes

A broken line of storms will track through southern WI overnight. Individual storms within the line will strengthen and ...
08/26/2026

A broken line of storms will track through southern WI overnight. Individual storms within the line will strengthen and weaken with time. Isolated hail and gusty winds are possible with any stronger storms.

A High Swim Risk is in effect for Tuesday afternoon and evening for the Lake Michigan beaches in Sheboygan County. This ...
08/24/2026

A High Swim Risk is in effect for Tuesday afternoon and evening for the Lake Michigan beaches in Sheboygan County. This is due to persistent and gusty south winds bringing building waves to this area. Stay out of the water during this period, and away from dangerous areas like piers and break walls. A Moderate Swim Risk for the Lake Michigan beaches in Ozaukee County is also expected during this period.

Beginning to see some widely scattered showers and isolated thunderstorm potential developing over portions of east-cent...
08/22/2026

Beginning to see some widely scattered showers and isolated thunderstorm potential developing over portions of east-central and southeast WI this afternoon. When thunder roars, go indoors!

An isolated storm may still become severe tonight, but generally expecting the main threat to be lightning in central an...
08/22/2026

An isolated storm may still become severe tonight, but generally expecting the main threat to be lightning in central and far southern Wisconsin. If a storm does become severe, expecting damaging winds and hail to be the main threat. Storms will dissipate after sunset between 8 and 9 PM.

A broken line of storms moving southeastward will remain capable of producing funnel clouds and an isolated tornado thro...
08/21/2026

A broken line of storms moving southeastward will remain capable of producing funnel clouds and an isolated tornado through the next hour or so. Expecting hazards of damaging winds and hail for the rest of the evening through sunset.

A strong storm with a history of funnel clouds will progress southeastward through southwestern WI this afternoon. Addit...
08/21/2026

A strong storm with a history of funnel clouds will progress southeastward through southwestern WI this afternoon. Additional developing storms to the northwest of Sauk County are also capable of this activity. Damaging winds are likely, and an isolated tornado cannot be ruled out!

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