Hazardous Weather Outlook
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
322 PM CDT Fri Oct 17 2025
ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-182030-
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-
322 PM CDT Fri Oct 17 2025 /422 PM EDT Fri Oct 17 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.
DISCUSSION...
Showers and a few thunderstorms are expected to develop after
midnight. Severe weather is not expected.
.DAYS TWO THROUGH SEVEN...Saturday through Thursday.
Saturday...
Limited Thunderstorm Risk...with an associated:
Level 1 of 5 Severe Thunderstorm Risk.
DISCUSSION...
A fall storm system will move through the area this weekend. A
severe thunderstorm cannot be ruled out Saturday or Saturday
night. However, widespread severe weather is not expected.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be necessary through tonight.
GENERAL STORM MOTION OF THE DAY:
Moving toward the east-northeast at 35 mph.
$$
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
322 PM CDT Fri Oct 17 2025
LMZ740>745-182030-
Winthrop Harbor to Wilmette Harbor IL-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN-
Burns Harbor to Michigan City IN-
322 PM CDT Fri Oct 17 2025
This Hazardous Weather Outlook is for portions of the Illinois
nearshore waters of Lake Michigan and the Indiana nearshore
waters of Lake Michigan.
.DAY ONE...Tonight.
Weather hazards expected...
Limited Thunderstorm Risk.
.DAYS TWO THROUGH SEVEN...Saturday through Thursday.
Saturday...
Hazardous conditions for small craft are likely.
Limited Thunderstorm Risk.
Sunday...
Gale force winds and hazardous waves likely.
Monday through Wednesday...
Hazardous conditions for small craft are likely.
A period of gale force winds and hazardous waves are possible.
$$
Yack
Visit us at www.weather.gov/chicago
Hazardous Weather Outlook
National Weather Service Quad Cities IA IL
903 PM CDT Fri Oct 17 2025
IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007-
009-015>018-024>026-034-035-MOZ009-010-190215-
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-
903 PM CDT Fri Oct 17 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...TONIGHT
Showers and scattered thunderstorms will continue to develop
across the Outlook area the rest of tonight. Lightning is the
primary hazard. A couple of stronger storms could also produce
small hail.
.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY
Patchy dense fog is possible Saturday morning across portions of
eastern Iowa, mainly along and northwest of a line from
Iowa City to Dubuque.
Additional scattered thunderstorms are expected Saturday evening.
Lightning is the primary hazard. Small hail and gusty winds may
also be possible with the strongest storms.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be needed tonight and is not anticipated
for Saturday evening.
$$
Hazardous Weather Outlook
National Weather Service Milwaukee/Sullivan WI
227 PM CDT Fri Oct 17 2025
LMZ080-261-362-364-366-563-565-567-669-671-673-675-777-779-868-
870-872-874-876-878-181930-
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-
227 PM CDT Fri Oct 17 2025
This Hazardous Weather Outlook is for the open waters of Lake
Michigan.
.DAY ONE...Tonight
Winds may occasionally approach gale force early this evening over
the northern third of the lake.
A few thunderstorms are possible late tonight.
.DAYS TWO THROUGH SEVEN...Saturday through Friday
A few thunderstorms remain possible on Saturday.
There is increasing gale potential on Sunday. Another potential
period of gales will occur Tuesday into midweek.
$$
www.weather.gov/mkx
Hazardous Weather Outlook
National Weather Service Milwaukee/Sullivan WI
227 PM CDT Fri Oct 17 2025
LMZ643>646-181930-
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-
227 PM CDT Fri Oct 17 2025
This Hazardous Weather Outlook is for the nearshore waters from
Sheboygan Wisconsin to Winthrop Harbor Illinois.
.DAY ONE...Tonight
A Small Craft Advisory remains in effect for elevated winds and
waves.
.DAYS TWO THROUGH SEVEN...Saturday through Friday
A Small Craft Advisory continues through Saturday morning.
Gusty winds return to the nearshore with the potential for gale
force gusts. Another period of gusty winds is expected Tuesday
into midweek.
$$
Hazardous Weather Outlook
National Weather Service Milwaukee/Sullivan WI
227 PM CDT Fri Oct 17 2025
WIZ046-047-051-052-056>060-062>072-181930-
Marquette-Green Lake-Fond du Lac-Sheboygan-Sauk-Columbia-Dodge-
Washington-Ozaukee-Iowa-Dane-Jefferson-Waukesha-Milwaukee-
Lafayette-Green-Rock-Walworth-Racine-Kenosha-
227 PM CDT Fri Oct 17 2025
This Hazardous Weather Outlook is for portions of east central
Wisconsin, south central Wisconsin and southeast Wisconsin.
.DAY ONE...Tonight
A few thunderstorms are possible late this evening into the
overnight hours.
.DAYS TWO THROUGH SEVEN...Saturday through Friday
A few thunderstorms will remain possible Saturday morning for far
southeastern WI.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be needed.
$$
Hazardous Weather Outlook
National Weather Service Northern Indiana
239 PM EDT Fri Oct 17 2025
INZ005>009-012>015-017-018-020-022>027-032>034-103-104-116-203-204-
216-MIZ078>081-177-277-OHZ001-002-004-005-015-016-024-025-181845-
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-
239 PM EDT Fri Oct 17 2025 /139 PM CDT Fri Oct 17 2025/
This Hazardous Weather Outlook is for northern Indiana, southwest
Michigan and northwest Ohio.
.DAY ONE...This afternoon and tonight.
No hazardous weather expected is expected at this time.
.DAYS TWO THROUGH SEVEN...Saturday through Thursday.
Thunderstorms will be possible Saturday into Sunday. There is a
marginal risk for severe thunderstorms Saturday into Saturday night.
.SPOTTER INFORMATION STATEMENT...
Spotter activation may be needed.
$$
Hazardous Weather Outlook
National Weather Service Grand Rapids MI
1229 PM EDT Fri Oct 17 2025
LMZ844>849-180915-
St Joseph to South Haven MI-South Haven to Holland MI-
Holland to Grand Haven MI-Grand Haven to Whitehall MI-
Whitehall to Pentwater MI-Pentwater to Manistee MI-
1229 PM EDT Fri Oct 17 2025
This hazardous weather outlook is for the nearshore waters from
St Joseph to Manistee.
.DAY ONE...Today and Tonight
Conditions will be hazardous for smaller craft both today and
tonight. The largest waves will be found from Holland north up the
shoreline.
.DAYS TWO THROUGH SEVEN...Saturday through Thursday
Smaller craft will continue to find hazardous conditions on
Saturday. On Sunday gale force winds are expected along with waves
in excess of 10 feet. A second strong fall storm is anticipated
from Monday into Tuesday with another round of wind and waves.
Thunderstorms will be possible over Lake Michigan Saturday into
Sunday.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be needed.
$$
DUKE NJJ
