Hazardous Weather Outlook
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
1134 AM CDT Thu Apr 16 2026
ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-171645-
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-
1134 AM CDT Thu Apr 16 2026 /1234 PM EDT Thu Apr 16 2026/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...This Afternoon and Tonight.
Weather hazards expected...
Limited Thunderstorm Risk.
Limited Fog Risk.
DISCUSSION...
An isolated thunderstorm or two is possible through early to
mid afternoon. No severe weather is expected.
Some dense fog is possible tonight, particularly closer to Lake
Michigan.
.DAYS TWO THROUGH SEVEN...Friday through Wednesday.
Friday...
Elevated Thunderstorm Risk...with an associated:
Level 3 of 5 Severe Thunderstorm Risk.
Elevated Flooding Risk.
Late Saturday night into Sunday morning...
Elevated Frost and Freeze Risk.
DISCUSSION...
A line of thunderstorms is expected to move across the area late
Friday afternoon through Friday night, some of which could be
severe, especially near and west of Interstate-39.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be necessary through tonight.
GENERAL STORM MOTION OF THE DAY:
Moving toward the east at 25 mph.
$$
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
1134 AM CDT Thu Apr 16 2026
LMZ740>745-171645-
Winthrop Harbor to Wilmette Harbor IL-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN-
Burns Harbor to Michigan City IN-
1134 AM CDT Thu Apr 16 2026
This Hazardous Weather Outlook is for portions of the Illinois
nearshore waters of Lake Michigan and the Indiana nearshore
waters of Lake Michigan.
.DAY ONE...This Afternoon and Tonight.
Weather hazards expected...
Limited Thunderstorm Risk.
Elevated Fog Risk.
.DAYS TWO THROUGH SEVEN...Friday through Wednesday.
Friday...
Hazardous conditions for small craft are likely.
Elevated Thunderstorm Risk...with an associated:
Level 1 of 5 Severe Thunderstorm Risk.
Limited Fog Risk.
Saturday through Tuesday...
Hazardous conditions for small craft are likely.
$$
- Izzi
Visit us at www.weather.gov/chicago
Hazardous Weather Outlook
National Weather Service Northern Indiana
756 AM EDT Thu Apr 16 2026
INZ005>009-012>015-017-018-020-022>027-032>034-103-104-116-203-204-
216-MIZ078>081-177-277-OHZ001-002-004-005-015-016-024-025-171200-
Elkhart-Lagrange-Steuben-Noble-De Kalb-Starke-Pulaski-Marshall-
Fulton IN-Whitley-Allen IN-White-Cass IN-Miami-Wabash-Huntington-
Wells-Adams-Grant-Blackford-Jay-Northern La Porte-
Eastern St. Joseph IN-Northern Kosciusko-Southern La Porte-
Western St. Joseph IN-Southern Kosciusko-Cass MI-St. Joseph MI-
Branch-Hillsdale-Northern Berrien-Southern Berrien-Williams-
Fulton OH-Defiance-Henry-Paulding-Putnam-Van Wert-Allen OH-
756 AM EDT Thu Apr 16 2026 /656 AM CDT Thu Apr 16 2026/
This Hazardous Weather Outlook is for northern Indiana, southwest
Michigan and northwest Ohio.
.DAY ONE...Today and tonight.
There is a chance for isolated thunderstorms this afternoon. Severe
storms are not expected.
.DAYS TWO THROUGH SEVEN...Friday through Wednesday.
There are additional chances for thunderstorms Friday night into
Saturday. Isolated severe storms are possible.
.SPOTTER INFORMATION STATEMENT...
Spotter activation is not expected at this time.
$$
Hazardous Weather Outlook
National Weather Service Northern Indiana
756 AM EDT Thu Apr 16 2026
LMZ043-046-171200-
New Buffalo MI to St Joseph MI-Michigan City IN to New Buffalo MI-
756 AM EDT Thu Apr 16 2026
This Hazardous Weather Outlook is for the nearshore waters of
southeastern Lake Michigan.
.DAY ONE...Today and tonight.
Scattered thunderstorms today with gusty winds and small hail as the
main threat.
.DAYS TWO THROUGH SEVEN...Friday through Wednesday.
There are chances for thunderstorms Friday night into Saturday
morning.
$$
Hazardous Weather Outlook
National Weather Service Milwaukee/Sullivan WI
617 AM CDT Thu Apr 16 2026
LMZ080-261-362-364-366-563-565-567-669-671-673-675-777-779-868-
870-872-874-876-878-171130-
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-
617 AM CDT Thu Apr 16 2026
This Hazardous Weather Outlook is for the open waters of Lake
Michigan.
.DAY ONE...Today and Tonight
Dense fog continues for the whole lake through today and
potentially through tonight. Thunderstorms may be possible over
the southern end of the lake this morning.
.DAYS TWO THROUGH SEVEN...Friday through Wednesday
Chances for thunderstorms return for Friday, with some strong to
severe storms possible for the evening.
Fog may continue into Friday.
$$
www.weather.gov/mkx
Hazardous Weather Outlook
National Weather Service Milwaukee/Sullivan WI
617 AM CDT Thu Apr 16 2026
LMZ643>646-171130-
Sheboygan to Port Washington WI-
Port Washington to North Point Light WI-
North Point Light to Wind Point WI-
Wind Point WI to Winthrop Harbor IL-
617 AM CDT Thu Apr 16 2026
This Hazardous Weather Outlook is for the nearshore waters from
Sheboygan Wisconsin to Winthrop Harbor Illinois.
.DAY ONE...Today and Tonight
Dense fog continues for the whole nearhsore through today and
perhaps into tonight. Thunderstorms may be possible over the
southern half of the lake this morning perhaps lingering into part
of the day today.
.DAYS TWO THROUGH SEVEN...Friday through Wednesday
Chances for thunderstorms return for Friday, with some strong to
severe storms possible for the evening.
Fog may continue into Friday.
$$
Hazardous Weather Outlook
National Weather Service Milwaukee/Sullivan WI
617 AM CDT Thu Apr 16 2026
WIZ046-047-051-052-056>060-062>072-171130-
Marquette-Green Lake-Fond du Lac-Sheboygan-Sauk-Columbia-Dodge-
Washington-Ozaukee-Iowa-Dane-Jefferson-Waukesha-Milwaukee-
Lafayette-Green-Rock-Walworth-Racine-Kenosha-
617 AM CDT Thu Apr 16 2026
This Hazardous Weather Outlook is for portions of east central
Wisconsin, south central Wisconsin and southeast Wisconsin.
.DAY ONE...Today and Tonight
Scattered showers and storms remain possible through noon. A
Flood Watch remains in effect for inland Wisconsin until 7 AM and
over southeast Wisconsin until 1 PM.
.DAYS TWO THROUGH SEVEN...Friday through Wednesday
Additional windows for heavy rainfall, flooding, and severe
thunderstorms Friday afternoon into Friday night.
.SPOTTER INFORMATION STATEMENT...
Spotter reports of flooding this morning are appreciated. Spotter
activation will be needed again on Friday for severe weather.
$$
Hazardous Weather Outlook
National Weather Service Quad Cities IA IL
338 AM CDT Thu Apr 16 2026
IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007-
009-015>018-024>026-034-035-MOZ009-010-170845-
Buchanan-Delaware-Dubuque-Benton-Linn-Jones-Jackson-Iowa-Johnson-
Cedar-Clinton-Muscatine-Scott-Keokuk-Washington-Louisa-Jefferson-
Henry IA-Des Moines-Van Buren-Lee-Jo Daviess-Stephenson-Carroll-
Whiteside-Rock Island-Henry IL-Bureau-Putnam-Mercer-Henderson-
Warren-Hancock-McDonough-Scotland-Clark-
338 AM CDT Thu Apr 16 2026
This Hazardous Weather Outlook is for portions of north central
Illinois...northwest Illinois...west central Illinois...east
central Iowa...northeast Iowa...southeast Iowa and northeast
Missouri.
.DAY ONE...TODAY AND TONIGHT
Area rivers are experiencing flooding. Please see the
latest Flood Statements and Flood Warnings for details.
.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY
There is an Enhanced Risk (Level 3 of 5) for severe weather area-
wide for Friday afternoon into Friday night. Damaging winds and
tornadoes are the primary threats. Localized flash flooding is
also possible.
Much colder air will bring the potential for frost and freeze
conditions to parts of the area Saturday night and Sunday night.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be needed through tonight.
$$
Hazardous Weather Outlook
National Weather Service Grand Rapids MI
330 AM EDT Thu Apr 16 2026
LMZ844>849-171000-
St Joseph to South Haven MI-South Haven to Holland MI-
Holland to Grand Haven MI-Grand Haven to Whitehall MI-
Whitehall to Pentwater MI-Pentwater to Manistee MI-
330 AM EDT Thu Apr 16 2026
This hazardous weather outlook is for the nearshore waters from
St Joseph to Manistee.
.DAY ONE...Today and Tonight
Thunderstorms are possible this morning. Dense fog reducing
visibilities to a mile or less will continue through tonight.
.DAYS TWO THROUGH SEVEN...Friday through Wednesday
Thunderstorms will be possible Friday night into Saturday. Small
Craft Advisory conditions are likely Friday night through the
weekend.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be needed.
$$
Hazardous Weather Outlook
National Weather Service Grand Rapids MI
330 AM EDT Thu Apr 16 2026
MIZ037>040-043>046-050>052-056>059-064>067-071>074-171000-
Mason-Lake-Osceola-Clare-Oceana-Newaygo-Mecosta-Isabella-Muskegon-
Montcalm-Gratiot-Ottawa-Kent-Ionia-Clinton-Allegan-Barry-Eaton-
Ingham-Van Buren-Kalamazoo-Calhoun-Jackson-
330 AM EDT Thu Apr 16 2026
This hazardous weather outlook is for portions of southwest Lower
Michigan.
.DAY ONE...Today and Tonight
Non-severe thunderstorms will be possible this morning.
.DAYS TWO THROUGH SEVEN...Friday through Wednesday
Severe thunderstorms are possible Saturday.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be needed.
$$
