Hazardous Weather Outlook
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
319 PM CDT Sun Aug 10 2025
ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-112030-
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-
319 PM CDT Sun Aug 10 2025 /419 PM EDT Sun Aug 10 2025/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...Tonight.
Weather hazards expected...
Limited Thunderstorm Risk.
Limited Flooding Risk.
DISCUSSION...
There is a chance of thunderstorms, mainly late this evening into
the overnight. Any storms that occur would be capable of producing
torrential downpours.
.DAYS TWO THROUGH SEVEN...Monday through Saturday.
Monday and Tuesday...
Limited Flooding Risk.
Limited Thunderstorm Risk.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be necessary through tonight.
GENERAL STORM MOTION OF THE DAY:
Moving toward the northeast at 30 mph.
$$
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
319 PM CDT Sun Aug 10 2025
LMZ740>745-112030-
Winthrop Harbor to Wilmette Harbor IL-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN-
Burns Harbor to Michigan City IN-
319 PM CDT Sun Aug 10 2025
This Hazardous Weather Outlook is for portions of the Illinois
nearshore waters of Lake Michigan and the Indiana nearshore
waters of Lake Michigan.
.DAY ONE...Tonight.
Weather hazards expected...
Limited Thunderstorm Risk late.
.DAYS TWO THROUGH SEVEN...Monday through Saturday.
Monday and Tuesday...
Limited Thunderstorm Risk.
$$
- Izzi
Visit us at www.weather.gov/chicago
Hazardous Weather Outlook
National Weather Service Milwaukee/Sullivan WI
316 PM CDT Sun Aug 10 2025
LMZ080-261-362-364-366-563-565-567-669-671-673-675-777-779-868-
870-872-874-876-878-112030-
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-
316 PM CDT Sun Aug 10 2025
This Hazardous Weather Outlook is for the open waters of Lake Michigan.
.DAY ONE...Tonight
There is a chance of thunderstorms tonight. Patchy dense fog is
possible.
.DAYS TWO THROUGH SEVEN...Monday through Sunday
Thunderstorm chances through Tuesday evening.
$$
MRC
www.weather.gov/mkx
Hazardous Weather Outlook
National Weather Service Grand Rapids MI
559 AM EDT Sun Aug 10 2025
LMZ844>849-111000-
St Joseph to South Haven MI-South Haven to Holland MI-
Holland to Grand Haven MI-Grand Haven to Whitehall MI-
Whitehall to Pentwater MI-Pentwater to Manistee MI-
559 AM EDT Sun Aug 10 2025
This hazardous weather outlook is for the nearshore waters from
St Joseph to Manistee.
.DAY ONE...Today and Tonight
Thunderstorms will be possible early this morning with more storms
possible this evening.
Conditions will be hazardous to swimmers and small craft again
this morning especially north of Whitehall.
.DAYS TWO THROUGH SEVEN...Monday through Saturday
Showers and storms will be possible through Tuesday.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be likely.
$$
Hazardous Weather Outlook
National Weather Service Grand Rapids MI
559 AM EDT Sun Aug 10 2025
MIZ037>040-043>046-050>052-056>059-064>067-071>074-111000-
Mason-Lake-Osceola-Clare-Oceana-Newaygo-Mecosta-Isabella-Muskegon-
Montcalm-Gratiot-Ottawa-Kent-Ionia-Clinton-Allegan-Barry-Eaton-
Ingham-Van Buren-Kalamazoo-Calhoun-Jackson-
559 AM EDT Sun Aug 10 2025
This hazardous weather outlook is for portions of southwest Lower
Michigan.
.DAY ONE...Today and Tonight
Showers and storms are possible north of I 96 and west of US 131
this morning with another round possible tonight. Threats are be
stronger wind gusts, lightning and heavy downpours.
.DAYS TWO THROUGH SEVEN...Monday through Saturday
Thunderstorms will be possible on and off through Tuesday, with
heavy downpours possible Monday night into Tuesday.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be likely.
$$
Hazardous Weather Outlook
National Weather Service Northern Indiana
422 AM EDT Sun Aug 10 2025
INZ005>009-012>015-017-018-020-022>027-032>034-103-104-116-203-204-
216-LMZ043-046-MIZ078>081-177-277-OHZ001-002-004-005-015-016-024-025-
110830-
Elkhart-Lagrange-Steuben-Noble-De Kalb-Starke-Pulaski-Marshall-
Fulton IN-Whitley-Allen IN-White-Cass IN-Miami-Wabash-Huntington-
Wells-Adams-Grant-Blackford-Jay-Northern La Porte-
Eastern St. Joseph IN-Northern Kosciusko-Southern La Porte-
Western St. Joseph IN-Southern Kosciusko-
New Buffalo MI to St Joseph MI-Michigan City IN to New Buffalo MI-
Cass MI-St. Joseph MI-Branch-Hillsdale-Northern Berrien-
Southern Berrien-Williams-Fulton OH-Defiance-Henry-Paulding-Putnam-
Van Wert-Allen OH-
422 AM EDT Sun Aug 10 2025 /322 AM CDT Sun Aug 10 2025/
This Hazardous Weather Outlook is for northern Indiana, southwest
Michigan, northwest Ohio and the nearshore waters of southeastern
Lake Michigan.
.DAY ONE...Today and tonight.
Afternoon heat indices today will range in the mid to upper 90s.
.DAYS TWO THROUGH SEVEN...Monday through Saturday.
Afternoon heat indices will range in the low to mid 90s on Monday.
.SPOTTER INFORMATION STATEMENT...
Spotter activation is not expected at this time.
$$
Andersen
Hazardous Weather Outlook
National Weather Service Detroit/Pontiac MI
356 AM EDT Sun Aug 10 2025
MIZ047>049-053>055-060>063-068>070-075-076-082-083-110800-
Midland-Bay-Huron-Saginaw-Tuscola-Sanilac-Shiawassee-Genesee-Lapeer-
St. Clair-Livingston-Oakland-Macomb-Washtenaw-Wayne-Lenawee-Monroe-
356 AM EDT Sun Aug 10 2025
This hazardous weather outlook is for southeast Michigan.
.DAY ONE...Today and Tonight
Hot and humid conditions today, with afternoon heat indices climbing
into the mid 90s.
.DAYS TWO THROUGH SEVEN...Monday through Saturday
Heat and humidity continue to affect the region Monday with heat
indices again in the mid 90s.
There will be a chance of thunderstorms Monday through Wednesday.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be needed today and tonight.
$$
