Hazardous Weather Outlook
Hazardous Weather Outlook
National Weather Service Marquette MI
358 PM EDT Thu Aug 21 2025
LMZ221-248-250-222000-
Green Bay North of line from Cedar River MI to Rock Island
Passage-Seul Choix Point to Point Detour MI-
5NM East of a line from Fairport MI to Rock Island Passage-
358 PM EDT Thu Aug 21 2025
This Hazardous Weather Outlook is for portions of Northern Lake
Michigan.
.DAY ONE...Tonight
Areas of dense fog are possible.
.DAYS TWO THROUGH SEVEN...Friday through Wednesday
Isolated thunderstorm chances Friday.
.SPOTTER INFORMATION STATEMENT...
The need for weather spotter reports is not anticipated at this
time.
$$
BW
Hazardous Weather Outlook
National Weather Service Marquette MI
358 PM EDT Thu Aug 21 2025
LSZ162-240>251-263>267-222000-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-Saxon Harbor WI to Black River MI-
Black River to Ontonagon MI-
Ontonagon to Upper Entrance of Portage Canal MI-
Upper Entrance of Portage Canal to Eagle River MI-
Eagle River to Manitou Island MI-
Manitou Island to Point Isabelle MI-
Point Isabelle to Lower Entrance of Portage Canal MI-
Lower Entrance of Portage Canal To Huron Islands MI Including
Keweenaw and Huron Bays-Huron Islands to Marquette MI-
Marquette to Munising MI-Munising to Grand Marais MI-
Grand Marais to Whitefish Point MI-
Lake Superior from Saxon Harbor WI to Upper Entrance to Portage
Canal MI 5NM off shore to the US/Canadian border including Isle
Royale National Park-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
Lake Superior East of a line from Manitou Island to Marquette MI
and West of a line from Grand Marais MI to the US/Canadian Border
Beyond 5NM from shore-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
358 PM EDT Thu Aug 21 2025 /258 PM CDT Thu Aug 21 2025/
This Hazardous Weather Outlook is for portions of Central Lake
Superior...Eastern Lake Superior and Western Lake Superior.
.DAY ONE...Tonight
Areas of dense fog are possible.
.DAYS TWO THROUGH SEVEN...Friday through Wednesday
Isolated thunderstorm chances Friday. Some may bring hail and
strong, erratic winds (5-14 percent chance).
A seasonably strong system moving north of the Great Lakes
will bring hazardous marine conditions to Lake Superior this
weekend; gales up to 35 knots are possible (30 to 40% chance).
.SPOTTER INFORMATION STATEMENT...
The need for weather spotter reports is not anticipated at this
time.
$$
Hazardous Weather Outlook
National Weather Service Marquette MI
358 PM EDT Thu Aug 21 2025
MIZ001>007-009>014-084-085-222000-
Keweenaw-Ontonagon-Northern Houghton-Baraga-Marquette-Alger-Luce-
Gogebic-Iron-Dickinson-Menominee-Delta-Southern Schoolcraft-
Southern Houghton-Northern Schoolcraft-
358 PM EDT Thu Aug 21 2025 /258 PM CDT Thu Aug 21 2025/
This Hazardous Weather Outlook is for portions of central Upper
Michigan and western Upper Michigan.
.DAY ONE...Tonight
Patchy dense fog is possible.
.DAYS TWO THROUGH SEVEN...Friday through Wednesday
Thunderstorm chances are expected Friday PM. Some may be strong
to severe, with the SPC issuing a Marginal Risk (category 1 of 5)
for 5-14 percent chances of damaging wind and hail.
.SPOTTER INFORMATION STATEMENT...
The need for weather spotter reports is not anticipated at this
time.
$$
Hazardous Weather Outlook
National Weather Service Grand Rapids MI
346 PM EDT Thu Aug 21 2025
LMZ844>849-220830-
St Joseph to South Haven MI-South Haven to Holland MI-
Holland to Grand Haven MI-Grand Haven to Whitehall MI-
Whitehall to Pentwater MI-Pentwater to Manistee MI-
346 PM EDT Thu Aug 21 2025
This hazardous weather outlook is for the nearshore waters from
St Joseph to Manistee.
.DAY ONE...Tonight
Areas of fog will be possible tonight.
.DAYS TWO THROUGH SEVEN...Friday through Wednesday
Thunderstorms will be possible Friday night and Saturday. Winds
and waves are also expected to increase over the weekend with a
chance for hazards to swimmers and small craft. There is another
chance for thunderstorms and even waterspouts Sunday night into
Monday.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be needed.
$$
TJT
Hazardous Weather Outlook
National Weather Service Grand Rapids MI
346 PM EDT Thu Aug 21 2025
MIZ037>040-043>046-050>052-056>059-064>067-071>074-220830-
Mason-Lake-Osceola-Clare-Oceana-Newaygo-Mecosta-Isabella-Muskegon-
Montcalm-Gratiot-Ottawa-Kent-Ionia-Clinton-Allegan-Barry-Eaton-
Ingham-Van Buren-Kalamazoo-Calhoun-Jackson-
346 PM EDT Thu Aug 21 2025
This hazardous weather outlook is for portions of southwest Lower
Michigan.
.DAY ONE...Tonight
Areas of fog will be possible tonight.
.DAYS TWO THROUGH SEVEN...Friday through Wednesday
Thunderstorms will be possible Friday night into Saturday and
again Sunday night into Monday. Thunderstorms are not expected to
be severe but will be capable of lightning and on Monday could
also include small hail.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be needed.
$$
Hazardous Weather Outlook
National Weather Service Milwaukee/Sullivan WI
239 PM CDT Thu Aug 21 2025
WIZ046-047-051-052-056>060-062>072-221945-
Marquette-Green Lake-Fond du Lac-Sheboygan-Sauk-Columbia-Dodge-
Washington-Ozaukee-Iowa-Dane-Jefferson-Waukesha-Milwaukee-
Lafayette-Green-Rock-Walworth-Racine-Kenosha-
239 PM CDT Thu Aug 21 2025
This Hazardous Weather Outlook is for portions of east central
Wisconsin, south central Wisconsin and southeast Wisconsin.
.DAY ONE...Tonight
Fog is possible over south central Wisconsin later tonight into
early Friday morning, especially west of Interstate 90. Patchy
dense fog may occur in low lying areas and river valleys.
.DAYS TWO THROUGH SEVEN...Friday through Thursday
A few thunderstorms are possible Friday night and early Saturday
morning.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be needed.
$$
Hazardous Weather Outlook
National Weather Service Green Bay WI
227 PM CDT Thu Aug 21 2025
WIZ005-010>013-018>022-030-031-035>040-045-048>050-073-074-221930-
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-
227 PM CDT Thu Aug 21 2025
This Hazardous Weather Outlook is for north-central and northeast
Wisconsin.
.DAY ONE...Tonight
Patchy fog is possible late tonight, especially over central
Wisconsin.
.DAYS TWO THROUGH SEVEN...Friday through Thursday
Patchy fog is possible early Friday morning, especially over
central Wisconsin.
Thunderstorms will be possible at times Friday afternoon through
Friday night, then again Sunday afternoon. Isolated strong to
severe storms are possible, especially over north-central
Wisconsin Friday afternoon into Friday evening.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be needed tonight.
$$
