Hazardous Weather Outlook
Hazardous Weather Outlook
National Weather Service Quad Cities IA IL
310 AM CDT Fri Aug 21 2026
IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007-
009-015>018-024>026-034-035-MOZ009-010-220815-
Buchanan-Delaware-Dubuque-Benton-Linn-Jones-Jackson-Iowa-Johnson-
Cedar-Clinton-Muscatine-Scott-Keokuk-Washington-Louisa-Jefferson-
Henry IA-Des Moines-Van Buren-Lee-Jo Daviess-Stephenson-Carroll-
Whiteside-Rock Island-Henry IL-Bureau-Putnam-Mercer-Henderson-
Warren-Hancock-McDonough-Scotland-Clark-
310 AM CDT Fri Aug 21 2026
This Hazardous Weather Outlook is for portions of north central
Illinois...northwest Illinois...west central Illinois...east
central Iowa...northeast Iowa...southeast Iowa and northeast
Missouri.
.DAY ONE...TODAY AND TONIGHT
There will be the chance for strong to severe storms today,
especially for areas along and east of the Mississippi River. Storms
are expected to develop through the afternoon hours with damaging
winds and hail being the primary threats, with isolated tornadoes
being secondary. The Storm Prediction Center has highlighted areas
along and east of the river in a Slight Risk, or level 2 of 5, for
severe weather. A Marginal Risk, level 1 of 5, remains for areas
west.
.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY
The probability for widespread hazardous weather is low.
.SPOTTER INFORMATION STATEMENT...
Storm spotter activation is expected today, especially in Illinois
this afternoon and evening.
$$
ERVIN
Hazardous Weather Outlook
National Weather Service Green Bay WI
217 AM CDT Fri Aug 21 2026
LMZ521-522-541>543-220730-
The Bay of Green Bay south of a line from Cedar River MI to Rock
Island Passage-Lake Michigan from Washington Island to Sheboygan-
217 AM CDT Fri Aug 21 2026
This Hazardous Weather Outlook is for portions of northwest Lake
Michigan and the waters of Green Bay.
.DAY ONE...Today and Tonight
There is a chance of thunderstorms this afternoon and evening. Any
thunderstorm could pose a hazard to mariners.
.DAYS TWO THROUGH SEVEN...Saturday through Thursday
There is a chance of thunderstorms on Saturday and Tuesday.
$$
Bersch
Hazardous Weather Outlook
National Weather Service Green Bay WI
217 AM CDT Fri Aug 21 2026
WIZ005-010>013-018>022-030-031-035>040-045-048>050-073-074-220730-
Vilas-Oneida-Forest-Florence-Northern Marinette County-Lincoln-
Langlade-Menominee-Northern Oconto County-Door-Marathon-Shawano-
Wood-Portage-Waupaca-Outagamie-Brown-Kewaunee-Waushara-Winnebago-
Calumet-Manitowoc-Southern Marinette County-
Southern Oconto County-
217 AM CDT Fri Aug 21 2026
This Hazardous Weather Outlook is for north-central and northeast
Wisconsin.
.DAY ONE...Today and Tonight
There is a chance of non-severe thunderstorms this morning.
Isolated to scattered thunderstorms are expected this afternoon
and evening, especially across eastern WI between 3 and 9 PM. A
few severe storms are possible (level 2 of 5 risk).
.DAYS TWO THROUGH SEVEN...Saturday through Thursday
There is a chance of thunderstorms on Saturday and Tuesday, but
the risk of severe weather is low.
.SPOTTER INFORMATION STATEMENT...
Spotters are requested to report wind gusts over 40 mph, hail and
any flooding to the National Weather Service in Green Bay.
$$
Hazardous Weather Outlook
National Weather Service Milwaukee/Sullivan WI
1250 AM CDT Fri Aug 21 2026
LMZ080-261-362-364-366-563-565-567-669-671-673-675-777-779-868-
870-872-874-876-878-220600-
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-
1250 AM CDT Fri Aug 21 2026
This Hazardous Weather Outlook is for the open waters of Lake Michigan.
.DAY ONE...Today and Tonight
Scattered thunderstorms are likely at times today. Gusty winds
and small hail may occur with any afternoon and evening storms.
.DAYS TWO THROUGH SEVEN...Saturday through Thursday
There is a chance of thunderstorms Saturday afternoon.
$$
MRC
www.weather.gov/mkx
Hazardous Weather Outlook
National Weather Service Milwaukee/Sullivan WI
1250 AM CDT Fri Aug 21 2026
LMZ643>646-220600-
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-
1250 AM CDT Fri Aug 21 2026
This Hazardous Weather Outlook is for the nearshore waters from
Sheboygan Wisconsin to Winthrop Harbor Illinois.
.DAY ONE...Today and Tonight
Scattered thunderstorms are likely at times today. Gusty winds
and small hail may occur with any afternoon and evening storms.
.DAYS TWO THROUGH SEVEN...Saturday through Thursday
There is a chance of thunderstorms Saturday afternoon.
$$
Hazardous Weather Outlook
National Weather Service Milwaukee/Sullivan WI
1250 AM CDT Fri Aug 21 2026
WIZ046-047-051-052-056>060-062>072-220600-
Marquette-Green Lake-Fond du Lac-Sheboygan-Sauk-Columbia-Dodge-
Washington-Ozaukee-Iowa-Dane-Jefferson-Waukesha-Milwaukee-
Lafayette-Green-Rock-Walworth-Racine-Kenosha-
1250 AM CDT Fri Aug 21 2026
This Hazardous Weather Outlook is for portions of east central
Wisconsin, south central Wisconsin and southeast Wisconsin.
.DAY ONE...Today
Scattered thunderstorms are likely at times today. Gusty winds
and small hail may occur with any afternoon and evening storms.
.DAYS TWO THROUGH SEVEN...Saturday through Thursday
There is a chance of thunderstorms Saturday afternoon for
portions of east central and southeast Wisconsin.
.SPOTTER INFORMATION STATEMENT...
Spotter activation is not anticipated.
$$
