Hazardous Weather Outlook
Hazardous Weather Outlook...UPDATED
National Weather Service Green Bay WI
346 AM CDT Wed Jun 18 2025
LMZ521-522-541>543-190900-
The Bay of Green Bay south of a line from Cedar River MI to Rock
Island Passage-Lake Michigan from Washington Island to Sheboygan-
346 AM CDT Wed Jun 18 2025
This Hazardous Weather Outlook is for portions of northwest Lake
Michigan and the waters of Green Bay.
.DAY ONE...Today and Tonight
Dense fog is expected through late this morning from the central
bay to around Washington Island. A Dense Fog Advisory is in effect
for these areas until noon today.
Thunderstorms are possible at times this afternoon and tonight
that would pose a hazard to mariners.
.DAYS TWO THROUGH SEVEN...Thursday through Tuesday
Thunderstorms will be possible at times from Thursday afternoon
through Saturday, and then again early next week. Any
thunderstorms that form would pose a hazard to mariners.
Increasing southerly winds and building waves could create
hazardous conditions for small craft Friday night through
the weekend. Dense marine fog may be possible at times this
weekend into early next week, especially on Lake Michigan.
$$
JLA/Eckberg
Hazardous Weather Outlook...UPDATED
National Weather Service Green Bay WI
346 AM CDT Wed Jun 18 2025
WIZ005-010>013-018>022-030-031-035>040-045-048>050-073-074-190900-
Vilas-Oneida-Forest-Florence-Northern Marinette County-Lincoln-
Langlade-Menominee-Northern Oconto County-Door-Marathon-Shawano-
Wood-Portage-Waupaca-Outagamie-Brown-Kewaunee-Waushara-Winnebago-
Calumet-Manitowoc-Southern Marinette County-
Southern Oconto County-
346 AM CDT Wed Jun 18 2025
This Hazardous Weather Outlook is for north-central and northeast
Wisconsin.
.DAY ONE...Today and Tonight
Areas of fog, locally dense, is expected this morning over
portions of Door County, including Washington Island.
There is a chance of thunderstorms through tonight. Severe storms
are not expected, however some of the stronger storms could
produce small hail, brief gusty winds and locally heavy rainfall.
.DAYS TWO THROUGH SEVEN...Thursday through Tuesday
Thunderstorms will be possible at times through Saturday,
especially Thursday afternoon and evening and then again from
Friday afternoon into Saturday where some of the storms could
become strong or severe at times. There is also the potential
for torrential rainfall with the stronger storms. Details
concerning timing and location are still uncertain at this time.
Thunderstorms are also possible early next week, however it is
too early to determine if storms would become severe.
A hot and humid airmass will move into the region this weekend
into early next week. Heat index values could climb well into
the 90s to around 100 degrees.
.SPOTTER INFORMATION STATEMENT...
Spotter activation is not expected today or tonight.
$$
Hazardous Weather Outlook
National Weather Service La Crosse WI
342 AM CDT Wed Jun 18 2025
IAZ008>011-018-019-029-030-MNZ079-086>088-094>096-WIZ017-029-
032>034-041>044-053>055-061-191245-
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-
342 AM CDT Wed Jun 18 2025
This Hazardous Weather Outlook is for portions of southeast
Minnesota...northeast Iowa and southwest into central Wisconsin.
.DAY ONE...Today and Tonight
Isolated non-severe storms possible today primarily in northeast
Iowa and southwest Wisconsin.
.DAYS TWO THROUGH SEVEN...Thursday through Tuesday
Strong to severe storms are possible Thursday night and Friday
primarily north of Interstate 90 in southeast Minnesota and
western into central Wisconsin. Details remain uncertain.
Dangerous heat on Saturday and Sunday with maximum heat indices
from 95 to 105 degrees in the afternoon. Highest values south of
Interstate 94 and in river valleys.
.SPOTTER INFORMATION STATEMENT...
No action needed.
.EMERGENCY MANAGEMENT COORDINATION...
No webinar is scheduled.
$$
JAR/DB
Hazardous Weather Outlook
National Weather Service Quad Cities IA IL
334 AM CDT Wed Jun 18 2025
IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007-
009-015>018-024>026-034-035-MOZ009-010-190845-
Buchanan-Delaware-Dubuque-Benton-Linn-Jones-Jackson-Iowa-Johnson-
Cedar-Clinton-Muscatine-Scott-Keokuk-Washington-Louisa-Jefferson-
Henry IA-Des Moines-Van Buren-Lee-Jo Daviess-Stephenson-Carroll-
Whiteside-Rock Island-Henry IL-Bureau-Putnam-Mercer-Henderson-
Warren-Hancock-McDonough-Scotland-Clark-
334 AM CDT Wed Jun 18 2025
This Hazardous Weather Outlook is for portions of north central
Illinois...northwest Illinois...west central Illinois...east
central Iowa...northeast Iowa...southeast Iowa and northeast
Missouri.
.DAY ONE...TODAY AND TONIGHT
Scattered showers and storms are possible today as a storm system
moves across the area. A few severe storms are possible
especially in Illinois. Locally heavy rainfall is also possible.
.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY
A storm system is forecast to pass to our north Thursday night
into Friday morning. Isolated severe storms are possible north of
Highway 30 or north of a Cedar Rapids to Clinton to Sterling Rock
Falls line. The main risks are frequent lightning, damaging
winds, and large hail.
.SPOTTER INFORMATION STATEMENT...
Spotter activation may be needed this morning into the early
afternoon.
$$
DC
Hazardous Weather Outlook
National Weather Service Milwaukee/Sullivan WI
256 AM CDT Wed Jun 18 2025
LMZ080-261-362-364-366-563-565-567-669-671-673-675-777-779-868-
870-872-874-876-878-190800-
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-
256 AM CDT Wed Jun 18 2025
This Hazardous Weather Outlook is for the open waters of Lake
Michigan.
.DAY ONE...Today and Tonight
Areas of fog may develop over the open waters of Lake Michigan for
today with additional scattered thunderstorms chances.
.DAYS TWO THROUGH SEVEN...Thursday through Tuesday
There are chances for thunderstorms at times Thursday night
through Friday night, and again into early next week.
$$
www.weather.gov/mkx
Hazardous Weather Outlook
National Weather Service Milwaukee/Sullivan WI
256 AM CDT Wed Jun 18 2025
LMZ643>646-190800-
Sheboygan to Port Washington WI-
Port Washington to North Point Light WI-
North Point Light to Wind Point WI-
Wind Point WI to Winthrop Harbor IL-
256 AM CDT Wed Jun 18 2025
This Hazardous Weather Outlook is for the nearshore waters from
Sheboygan Wisconsin to Winthrop Harbor Illinois.
.DAY ONE...Today and Tonight
Widespread showers and embedded storms today will produce heavy
rainfall especially over southeast Wisconsin. Urban and small
stream flooding will be possible.
.DAYS TWO THROUGH SEVEN...Thursday through Tuesday
There are chances for thunderstorms at times Thursday afternoon
into Saturday morning, and again for early next week.
$$
Hazardous Weather Outlook
National Weather Service Milwaukee/Sullivan WI
256 AM CDT Wed Jun 18 2025
WIZ046-047-051-052-056>060-062>072-190800-
Marquette-Green Lake-Fond du Lac-Sheboygan-Sauk-Columbia-Dodge-
Washington-Ozaukee-Iowa-Dane-Jefferson-Waukesha-Milwaukee-
Lafayette-Green-Rock-Walworth-Racine-Kenosha-
256 AM CDT Wed Jun 18 2025
This Hazardous Weather Outlook is for portions of east central
Wisconsin, south central Wisconsin and southeast Wisconsin.
.DAY ONE...Today and Tonight
Widespread showers and embedded storms today will produce heavy
rainfall especially over southeast Wisconsin. Urban and small
stream flooding will be possible.
.DAYS TWO THROUGH SEVEN...Thursday through Tuesday
Hot and humid conditions are forecast Saturday through Monday.
Heat index values will be around 100 degrees.
There are chances for thunderstorms at times Thursday night into
Friday night and again Monday night and Tuesday.
.SPOTTER INFORMATION STATEMENT...
Spotter activation is not needed this evening. Rainfall reports
will be appreciated.
$$
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
346 PM CDT Tue Jun 17 2025
ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-182100-
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
346 PM CDT Tue Jun 17 2025 /446 PM EDT Tue Jun 17 2025/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...Tonight.
Weather hazards expected...
Elevated Thunderstorm Risk.
Limited Flooding Risk.
DISCUSSION...
Scattered thunderstorms are likely tonight, especially this
evening. Cloud to ground lightning, briefly gusty winds, and
torrential downpours will be the primary threats.
.DAYS TWO THROUGH SEVEN...Wednesday through Monday.
Wednesday...
Limited Flooding Risk.
Elevated Thunderstorm Risk...with an associated:
Level 3 of 5 Severe Thunderstorm Risk.
Saturday through Monday...
Elevated Excessive Heat Risk.
DISCUSSION...
Thunderstorms are likely Wednesday. There is a chance that a few
of the storms could be severe, especially across northwest
Indiana. If severe thunderstorms occur, damaging winds, large
hail and tornadoes would all be possible, in addition to locally
heavy rainfall.
Isolated strong storms are possible across southeast Wisconsin
late Thursday afternoon and evening. A few of these could clip
far northeast Illinois near the Wisconsin border, with a brief
damaging wind and hail threat.
Peak afternoon heat indices near or above 100 degrees are
expected this weekend into early next week.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be necessary through tonight.
GENERAL STORM MOTION OF THE DAY:
Moving toward the east-northeast at 25 mph.
$$
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
346 PM CDT Tue Jun 17 2025
LMZ740>745-182100-
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-
346 PM CDT Tue Jun 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...Wednesday through Monday.
Wednesday...
Elevated Thunderstorm Risk...with an associated:
Level 2 of 5 Severe Thunderstorm Risk.
Saturday...
Hazardous conditions for small craft are likely.
$$
- Izzi
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