804 FLUS43 KMKX 131358 HWOMKX Hazardous Weather Outlook National Weather Service Milwaukee/Sullivan WI 858 AM CDT Mon Apr 13 2026 WIZ046-047-051-052-056>060-062>072-141400- Marquette-Green Lake-Fond du Lac-Sheboygan-Sauk-Columbia-Dodge- Washington-Ozaukee-Iowa-Dane-Jefferson-Waukesha-Milwaukee- Lafayette-Green-Rock-Walworth-Racine-Kenosha- 858 AM CDT Mon Apr 13 2026 This Hazardous Weather Outlook is for portions of east central Wisconsin, south central Wisconsin and southeast Wisconsin. .DAY ONE...Today and Tonight Strong to severe thunderstorms possible this afternoon and evening. Heavy rain and flooding potential will also be possible, especially across central WI. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday Additional rounds of thunderstorms Tuesday through the end of the week. Heavy rain and flooding potential will accompanying this activity. Also will be strong to severe thunderstorm chances Tuesday afternoon through Wednesday and again toward the end of the week. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed this afternoon/evening across the central WI and will be needed areawide Tuesday and Wednesday. $$ LMZ643>646-141400- Sheboygan to Port Washington WI- Port Washington to North Point Light WI- North Point Light to Wind Point WI- Wind Point WI to Winthrop Harbor IL- 858 AM CDT Mon Apr 13 2026 This Hazardous Weather Outlook is for the nearshore waters from Sheboygan Wisconsin to Winthrop Harbor Illinois. .DAY ONE...Today and Tonight Pockets of fog are possible. Some fog could become dense. Chances for thunderstorms this afternoon/evening, some strong to severe storms possible. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday Chances for thunderstorms each day, some strong to severe storms possible. Areas of fog are possible into Tuesday morning. Some fog could become dense. $$ LMZ080-261-362-364-366-563-565-567-669-671-673-675-777-779-868- 870-872-874-876-878-141400- Lake Michigan Michigan City IN to St. Joseph MI 5 NM offshore to mid-line of lake.- Lake Michigan from Seul Choix Point to Rock Island Passage 5NM offshore to Mid Lake- Lake Michigan South of a line from Seul Choix Point to the Mackinac Bridge and North of a line from Charlevoix MI to South Fox Island 5NM offshore- Lake Michigan from Charlevoix to Point Betsie MI 5NM Offshore to mid lake- Lake Michigan from Point Betsie to Manistee MI 5NM offshore to Mid Lake- Lake Michigan from Rock Island Passage to Sturgeon Bay WI 5NM offshore to mid lake- Lake Michigan from Sturgeon Bay to Two Rivers WI 5NM offshore to Mid Lake- Lake Michigan from Two Rivers to Sheboygan WI 5NM offshore to Mid Lake- Lake Michigan from Sheboygan to Port Washington WI 5NM offshore to Mid Lake- Lake Michigan from Port Washington to North Point Light WI 5NM offshore to Mid Lake- Lake Michigan from North Point Light to Wind Point WI 5NM offshore to Mid Lake- Lake Michigan from Wind Point WI to Winthrop Harbor IL 5NM offshore to Mid Lake- Lake Michigan from Winthrop Harbor to Wilmette Harbor IL 5NM offshore to Mid Lake- Lake Michigan from Wilmette Harbor to Michigan City in 5NM offshore to Mid Lake- Lake Michigan from Pentwater to Manistee MI 5NM offshore to Mid Lake- Lake Michigan from Whitehall to Pentwater MI 5NM offshore to Mid Lake- Lake Michigan from Grand Haven to Whitehall MI 5NM offshore to Mid Lake- Lake Michigan from Holland to Grand Haven MI 5NM offshore to Mid Lake- Lake Michigan from South Haven to Holland MI 5NM offshore to Mid lake- Lake Michigan from St Joseph to South Haven MI 5NM offshore to Mid Lake- 858 AM CDT Mon Apr 13 2026 This Hazardous Weather Outlook is for the open waters of Lake Michigan. .DAY ONE...Today and Tonight Areas of fog will continue, with some dense fog expected. A Dense Fog Advisory is in effect over northern Lake Michigan. Chances for thunderstorms this afternoon/evening, some strong storms possible. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday Chances for thunderstorms each day, some strong to severe storms possible. Areas of fog could continue through Tuesday morning. Some fog could become dense. $$ www.weather.gov/mkx