Small Craft Advisory
URGENT - MARINE WEATHER MESSAGE
National Weather Service Detroit/Pontiac MI
344 AM EDT Fri Sep 18 2026
LHZ421-441-182000-
/O.CON.KDTX.SC.Y.0055.260918T1000Z-260918T2000Z/
Outer Saginaw Bay SW of Alabaster to Port Austin MI to Inner
Saginaw Bay-Port Austin to Harbor Beach MI-
344 AM EDT Fri Sep 18 2026
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 4 PM EDT THIS
AFTERNOON...
* WHAT...Expect sustained winds up to 17 knots from the
northeast with gusts up to 20 knots. The largest significant
waves will be 4 feet with a potential maximum wave height of 5
feet.
* WHERE...Outer Saginaw Bay SW of Alabaster to Port Austin MI to
Inner Saginaw Bay and Port Austin to Harbor Beach MI.
* WHEN...The maximum winds are expected around 6 AM EDT Friday
with the largest waves expected around 7 AM EDT Friday.
* IMPACTS...Conditions will be hazardous to small craft.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.
&&
$$
URGENT - MARINE WEATHER MESSAGE
National Weather Service Detroit/Pontiac MI
344 AM EDT Fri Sep 18 2026
LHZ442-443-182000-
/O.CON.KDTX.SC.Y.0055.260918T1000Z-260919T0400Z/
Harbor Beach to Port Sanilac MI-Port Sanilac to Port Huron MI-
344 AM EDT Fri Sep 18 2026
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT EDT
TONIGHT...
* WHAT...Expect sustained winds up to 18 knots from the north
with gusts up to 22 knots. The largest significant waves will
be 4 feet with a potential maximum wave height of 5 feet.
* WHERE...Harbor Beach to Port Sanilac MI and Port Sanilac to
Port Huron MI.
* WHEN...The maximum winds are expected around 6 PM EDT Friday
with the largest waves expected around 7 PM EDT Friday.
* IMPACTS...Conditions will be hazardous to small craft.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.
&&
$$
Hazardous Weather Outlook
Hazardous Weather Outlook
National Weather Service Detroit/Pontiac MI
426 AM EDT Fri Sep 18 2026
LCZ460-LEZ444-LHZ361>363-421-422-441>443-462>464-190830-
Lake St Clair-
Michigan Waters of Lake Erie from Detroit River to North Cape MI-
Lake Huron from 5NM east of Mackinac Bridge to Presque Isle Lt
beyond 5 NM off shore-
Lake Huron from Presque Isle Light to Sturgeon Point MI beyond 5NM
off shore-
Lake Huron from Sturgeon Point to Alabaster MI beyond 5NM off shore-
Outer Saginaw Bay SW of Alabaster to Port Austin MI to Inner Saginaw
Bay-Inner Saginaw Bay SW of Point Au Gres to Bay Port MI-
Port Austin to Harbor Beach MI-Harbor Beach to Port Sanilac MI-
Port Sanilac to Port Huron MI-
Lake Huron from Port Austin to Harbor Beach beyond 5NM Off Shore-
Lake Huron from Harbor Beach to Port Sanilac beyond 5NM Off Shore-
Lake Huron from Port Sanilac to Port Huron beyond 5NM Off Shore-
426 AM EDT Fri Sep 18 2026
This hazardous weather outlook is for portions of Lake Erie, Lake
Huron and Lake St Clair.
.DAY ONE...Today and Tonight
Small Craft Advisories are in effect for the Lake Huron nearshore
waters around the Thumb today. Refer to the latest marine forecast
and hazard message for details.
.DAYS TWO THROUGH SEVEN...Saturday through Thursday
Isolated thunderstorms will be possible this weekend, mainly near
western Lake Erie and Lake St. Clair.
Gusty northeast winds bring potential for Small Craft Advisories on
Sunday and Monday.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be needed today and tonight.
$$
You can obtain your latest National Weather Service forecasts online
at www.weather.gov/detroit.
TF
Hazardous Weather Outlook
National Weather Service Green Bay WI
121 AM CDT Fri Sep 18 2026
LMZ521-522-541>543-190630-
The Bay of Green Bay south of a line from Cedar River MI to Rock
Island Passage-Lake Michigan from Washington Island to Sheboygan-
121 AM CDT Fri Sep 18 2026
This Hazardous Weather Outlook is for portions of northwest Lake
Michigan and the waters of Green Bay.
.DAY ONE...Today and Tonight
There is a chance of thunderstorms tonight. The thunderstorms may
pose a hazard for mariners.
Conditions hazardous to small craft are expected south of Algoma
late tonight.
.DAYS TWO THROUGH SEVEN...Saturday through Thursday
Chances of thunderstorms continue into Saturday morning. The
thunderstorms may pose a hazard for mariners.
Conditions hazardous to small craft are expected at times from
Saturday through Monday.
$$
MPC
Hazardous Weather Outlook
National Weather Service Green Bay WI
121 AM CDT Fri Sep 18 2026
WIZ005-010>013-018>022-030-031-035>040-045-048>050-073-074-190630-
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-
121 AM CDT Fri Sep 18 2026
This Hazardous Weather Outlook is for north-central and northeast
Wisconsin.
.DAY ONE...Today and Tonight
Moderate to heavy rainfall is likely over central and east-
central Wisconsin this afternoon through tonight. Localized
flooding will be possible. There will also be a chance of
thunderstorms tonight, but severe weather is not expected.
There will be an increased risk of rip currents along Lake
Michigan beaches south of Algoma late tonight.
.DAYS TWO THROUGH SEVEN...Saturday through Thursday
The chance of thunderstorms will continue on Saturday morning over
east-central Wisconsin. The risk of severe weather is low.
There will be an increased risk of rip currents along Lake
Michigan beaches south of Algoma through Saturday afternoon.
The rip current risk will also be high from Sunday into Monday.
.SPOTTER INFORMATION STATEMENT...
Spotters are requested to report any flooding or rainfalls over 1
inch to the National Weather Service in Green Bay.
$$
Hazardous Weather Outlook
National Weather Service Milwaukee/Sullivan WI
1219 AM CDT Fri Sep 18 2026
LMZ080-261-362-364-366-563-565-567-669-671-673-675-777-779-868-
870-872-874-876-878-190530-
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-
1219 AM CDT Fri Sep 18 2026
This Hazardous Weather Outlook is for the open waters of Lake Michigan.
.DAY ONE...Tonight
Hazardous weather is not expected at this time.
.DAYS TWO THROUGH SEVEN...Friday through Thursday
Brisk east or northeast winds and high waves are forecast Friday
night into early next week.
Scattered thunderstorms are expected Friday evening into Saturday
night.
$$
www.weather.gov/mkx
Hazardous Weather Outlook
National Weather Service Milwaukee/Sullivan WI
1219 AM CDT Fri Sep 18 2026
LMZ643>646-190530-
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-
1219 AM CDT Fri Sep 18 2026
This Hazardous Weather Outlook is for the nearshore waters from
Sheboygan Wisconsin to Winthrop Harbor Illinois.
.DAY ONE...Tonight
Hazardous weather is not expected at this time.
.DAYS TWO THROUGH SEVEN...Friday through Thursday
A Small Craft Advisory is in effect Friday morning into the early
afternoon from North Point Lighthouse to Winthrop Harbor.
Additional Small Craft Advisories will be needed Friday night into
early next week.
Scattered thunderstorms are expected Friday night through
Saturday night.
$$
Hazardous Weather Outlook
National Weather Service Milwaukee/Sullivan WI
1219 AM CDT Fri Sep 18 2026
WIZ046-047-051-052-056>060-062>072-190530-
Marquette-Green Lake-Fond du Lac-Sheboygan-Sauk-Columbia-Dodge-
Washington-Ozaukee-Iowa-Dane-Jefferson-Waukesha-Milwaukee-
Lafayette-Green-Rock-Walworth-Racine-Kenosha-
1219 AM CDT Fri Sep 18 2026
This Hazardous Weather Outlook is for portions of east central
Wisconsin, south central Wisconsin and southeast Wisconsin.
.DAY ONE...Tonight
Pockets of fog are possible into the predawn hours.
.DAYS TWO THROUGH SEVEN...Friday through Thursday
Widespread showers and thunderstorms are expected Friday night and
Saturday morning. Heavy rainfall of 1 to 3 inches and locally
more is forecast. Urban and small stream flooding or isolated
flash flooding is possible. A Flood Watch is now in effect for
parts of southwest Wisconsin. Additional rain may occur Saturday
night into early next week especially toward the Illinois border.
A High Swim Risk and Beach Hazards Statement is in effect Friday
morning into the early afternoon for Milwaukee, Racine and Kenosha
Counties. Afterward, a prolonged period of moderate to high swim
risk conditions is expected Friday night through the beginning of
next week at all Lake Michigan beaches. Additional Beach Hazards
Statements are likely.
Prolonged periods of elevated waves could cause areas of lakeshore
flooding & beach erosion early next week.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be needed but rainfall reports are
appreciated.
$$
