Hazardous Weather Outlook
Hazardous Weather Outlook
National Weather Service Milwaukee/Sullivan WI
226 PM CDT Tue May 20 2025
LMZ080-261-362-364-366-563-565-567-669-671-673-675-777-779-868-
870-872-874-876-878-211930-
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-
226 PM CDT Tue May 20 2025
This Hazardous Weather Outlook is for the open waters of Lake Michigan.
.DAY ONE...Tonight
A Gale Warning remains in effect until 4 PM CDT for the southern
third of Lake Michigan. Gusty winds to 30 knots will continue
tonight, mainly across the southern half of the lake.
Isolated thunderstorms are possible through early this evening in
the south.
.DAYS TWO THROUGH SEVEN...Wednesday through Tuesday
No hazardous weather is expected at this time.
$$
www.weather.gov/mkx
Hazardous Weather Outlook
National Weather Service Milwaukee/Sullivan WI
226 PM CDT Tue May 20 2025
LMZ643>646-211930-
Sheboygan to Port Washington WI-
Port Washington to North Point Light WI-
North Point Light to Wind Point WI-
Wind Point WI to Winthrop Harbor IL-
226 PM CDT Tue May 20 2025
This Hazardous Weather Outlook is for the nearshore waters from
Sheboygan Wisconsin to Winthrop Harbor Illinois.
.DAY ONE...Tonight
A Gale Warning is in effect through 4 PM CDT from Port Washington
south. A Small Craft Advisory continues further north.
A few thunderstorms are possible today.
.DAYS TWO THROUGH SEVEN...Wednesday through Tuesday
Small Craft Advisory conditions continue into Thursday.
$$
Hazardous Weather Outlook
National Weather Service Milwaukee/Sullivan WI
226 PM CDT Tue May 20 2025
WIZ046-047-051-052-056>060-062>072-211930-
Marquette-Green Lake-Fond du Lac-Sheboygan-Sauk-Columbia-Dodge-
Washington-Ozaukee-Iowa-Dane-Jefferson-Waukesha-Milwaukee-
Lafayette-Green-Rock-Walworth-Racine-Kenosha-
226 PM CDT Tue May 20 2025
This Hazardous Weather Outlook is for portions of east central
Wisconsin, south central Wisconsin and southeast Wisconsin.
.DAY ONE...Tonight
There is a small chance of thunder mainly along and south of I-94
through early this evening.
.DAYS TWO THROUGH SEVEN...Wednesday through Tuesday
No hazardous weather is expected at this time.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be needed.
$$
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
315 PM CDT Tue May 20 2025
ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-212015-
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
315 PM CDT Tue May 20 2025 /415 PM EDT Tue May 20 2025/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...Tonight.
Weather hazards expected...
Elevated Thunderstorm Risk...with an associated:
Level 1 of 5 Tornado Risk.
Level 2 of 5 Damaging Wind Risk...up to 60 mph.
Level 2 of 5 Large Hail Risk...up to quarter size.
Limited Flooding Risk.
DISCUSSION...
Scattered thunderstorms will move across the area late this
afternoon into early this evening. A few storms could become
severe, mainly near and south of a La Salle to Rensselaer line.
All severe hazards, including a few tornadoes, are possible,
though the primary severe threats are expected to be localized
damaging wind gusts and isolated large hail up to the size of
quarters.
.DAYS TWO THROUGH SEVEN...Wednesday through Monday.
No hazardous weather is expected at this time.
.SPOTTER INFORMATION STATEMENT...
Spotters may be needed this afternoon and early evening.
GENERAL STORM MOTION OF THE DAY:
Moving toward the north-northeast at around 30 mph.
$$
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
315 PM CDT Tue May 20 2025
LMZ740>745-212015-
Winthrop Harbor to Wilmette Harbor IL-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN-
Burns Harbor to Michigan City IN-
315 PM CDT Tue May 20 2025
This Hazardous Weather Outlook is for portions of the Illinois
nearshore waters of Lake Michigan and the Indiana nearshore
waters of Lake Michigan.
.DAY ONE...Tonight.
Weather hazards expected...
Hazardous conditions for small craft.
Limited Thunderstorm Risk this evening.
.DAYS TWO THROUGH SEVEN...Wednesday through Monday.
Wednesday and Thursday...
Hazardous conditions for small craft are likely.
$$
Ratzer
Visit us at www.weather.gov/chicago
Hazardous Weather Outlook
National Weather Service Quad Cities IA IL
314 PM CDT Tue May 20 2025
IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007-
009-015>018-024>026-034-035-MOZ009-010-212015-
Buchanan-Delaware-Dubuque-Benton-Linn-Jones-Jackson-Iowa-Johnson-
Cedar-Clinton-Muscatine-Scott-Keokuk-Washington-Louisa-Jefferson-
Henry IA-Des Moines-Van Buren-Lee-Jo Daviess-Stephenson-Carroll-
Whiteside-Rock Island-Henry IL-Bureau-Putnam-Mercer-Henderson-
Warren-Hancock-McDonough-Scotland-Clark-
314 PM CDT Tue May 20 2025
This Hazardous Weather Outlook is for portions of north central
Illinois...northwest Illinois...west central Illinois...east
central Iowa...northeast Iowa...southeast Iowa and northeast
Missouri.
.DAY ONE...THIS AFTERNOON AND TONIGHT
A Marginal to Slight Risk (level 1 and 2 out of 5 risk) for
severe storms continues this afternoon, mainly over northwestern
Illinois. Damaging winds and tornadoes will be the primary risks.
Localized flash flooding is also possible.
.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY
The probability for widespread hazardous weather is low.
.SPOTTER INFORMATION STATEMENT...
Spotter activation is expected this afternoon over northwestern
Illinois.
GENERAL STORM MOTION OF THE DAY:
To the north-northeast at 40 mph.
$$
JTS
Hazardous Weather Outlook
National Weather Service Green Bay WI
137 PM CDT Tue May 20 2025
LMZ521-522-541>543-211845-
The Bay of Green Bay south of a line from Cedar River MI to Rock
Island Passage-Lake Michigan from Washington Island to Sheboygan-
137 PM CDT Tue May 20 2025
This Hazardous Weather Outlook is for portions of northwest Lake
Michigan and the waters of Green Bay.
.DAY ONE...Tonight
Conditions hazardous to small craft are expected on the bay and
lake due to gusty east-northeast winds and building waves.
.DAYS TWO THROUGH SEVEN...Wednesday through Tuesday
Conditions hazardous to small craft continue on the bay through
late Wednesday afternoon, and on the lake through late Wednesday
night due to gusty east-northeast winds and high waves.
$$
Uhlmann/Goodin
Hazardous Weather Outlook
National Weather Service Green Bay WI
137 PM CDT Tue May 20 2025
WIZ005-010>013-018>022-030-031-035>040-045-048>050-073-074-211845-
Vilas-Oneida-Forest-Florence-Northern Marinette County-Lincoln-
Langlade-Menominee-Northern Oconto County-Door-Marathon-Shawano-
Wood-Portage-Waupaca-Outagamie-Brown-Kewaunee-Waushara-Winnebago-
Calumet-Manitowoc-Southern Marinette County-
Southern Oconto County-
137 PM CDT Tue May 20 2025
This Hazardous Weather Outlook is for north-central and northeast
Wisconsin.
.DAY ONE...Tonight
East/northeast winds gusting from 30 to 35 mph continue over
central and east-central Wisconsin tonight, which may make
travel difficult for high profile vehicles on north-south
orientated roads.
.DAYS TWO THROUGH SEVEN...Wednesday through Tuesday
The probability for widespread hazardous weather is low.
.SPOTTER INFORMATION STATEMENT...
Spotters are requested to report peak wind gusts to the National
Weather Service in Green Bay.
$$
Hazardous Weather Outlook
National Weather Service La Crosse WI
Issued by National Weather Service Quad Cities IA IL
345 AM CDT Tue May 20 2025
IAZ008>011-018-019-029-030-MNZ079-086>088-094>096-WIZ017-029-
032>034-041>044-053>055-061-211245-
Mitchell-Howard-Winneshiek-Allamakee-Floyd-Chickasaw-Fayette-
Clayton-Wabasha-Dodge-Olmsted-Winona-Mower-Fillmore-Houston-
Taylor-Clark-Buffalo-Trempealeau-Jackson-La Crosse-Monroe-Juneau-
Adams-Vernon-Crawford-Richland-Grant-
345 AM CDT Tue May 20 2025
This Hazardous Weather Outlook is for portions of southeast
Minnesota...northeast Iowa and southwest into central Wisconsin.
.DAY ONE...Today and Tonight
East winds this morning and early afternoon will regularly gust
to 35 mph and at times near 45 mph.
Rainfall, heavy at times this morning, will provide a total of
two to two and a half inches of rainfall in southeast Minnesota,
northeast Iowa, and southwest Wisconsin through tonight.
Widespread flooding is unlikely but minor lowland flooding is
possible.
Non-severe thunderstorms will accompany some of the rain today
south of I-90.
.DAYS TWO THROUGH SEVEN...Wednesday through Monday
Frost may occur in interior portions of Wisconsin Wednesday and
Thursday nights.
.SPOTTER INFORMATION STATEMENT...
No action needed, but rainfall amounts are appreciated.
.EMERGENCY MANAGEMENT COORDINATION...
No webinar is scheduled.
$$
