Small Craft Advisory
URGENT - MARINE WEATHER MESSAGE
National Weather Service Duluth MN
1207 AM CDT Tue Aug 18 2026
LSZ140-181715-
/O.NEW.KDLH.SC.Y.0096.260818T2000Z-260819T0000Z/
Grand Portage to Grand Marais MN-
1207 AM CDT Tue Aug 18 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 3 PM THIS AFTERNOON TO
7 PM CDT THIS EVENING...
* WHAT...Southwest winds 10 to 15 kt with gusts up to 25 kt and
waves 1 to 3 ft expected.
* WHERE...Grand Portage to Grand Marais MN.
* WHEN...From 3 PM this afternoon to 7 PM CDT this evening.
* IMPACTS...Conditions will be hazardous to small craft.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Anyone operating a smaller vessel should avoid navigating in
hazardous conditions.
&&
$$
URGENT - MARINE WEATHER MESSAGE
National Weather Service Marquette MI
1000 PM EDT Mon Aug 17 2026
LSZ247-181200-
/O.CON.KMQT.SC.Y.0120.260818T0800Z-260818T1200Z/
Lower Entrance of Portage Canal To Huron Islands MI Including
Keweenaw and Huron Bays-
1000 PM EDT Mon Aug 17 2026
...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 4 AM TO 8 AM EDT
TUESDAY...
* WHAT...West winds 10 to 15 kt with gusts up to 25 kt and waves
1 to 2 ft expected.
* WHERE...Lower Entrance of Portage Canal To Huron Islands MI
Including Keweenaw and Huron Bays.
* WHEN...From 4 AM to 8 AM EDT Tuesday.
* IMPACTS...Conditions will be hazardous to small craft.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.
&&
$$
URGENT - MARINE WEATHER MESSAGE
National Weather Service Marquette MI
1000 PM EDT Mon Aug 17 2026
LSZ248-181400-
/O.CON.KMQT.SC.Y.0120.260818T0800Z-260818T2100Z/
Huron Islands to Marquette MI-
1000 PM EDT Mon Aug 17 2026
...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 4 AM TO 5 PM EDT
TUESDAY...
* WHAT...Northwest winds 10 to 15 kt with gusts up to 25 kt and
waves up to 3 ft expected.
* WHERE...Huron Islands to Marquette MI.
* WHEN...From 4 AM to 5 PM EDT Tuesday.
* 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 Milwaukee/Sullivan WI
1201 AM CDT Tue Aug 18 2026
LMZ080-261-362-364-366-563-565-567-669-671-673-675-777-779-868-
870-872-874-876-878-190515-
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-
1201 AM CDT Tue Aug 18 2026
This Hazardous Weather Outlook is for the open waters of Lake Michigan.
.DAY ONE...Rest of Tonight and Tuesday
Chance of thunderstorms, mainly in the afternoon and evening.
.DAYS TWO THROUGH SEVEN...Tuesday through Monday
Chance of thunderstorms on Friday.
$$
MRC
www.weather.gov/mkx
Hazardous Weather Outlook
National Weather Service Duluth MN
1004 PM CDT Mon Aug 17 2026
LSZ121-140>148-150-190315-
Bayfield to Oak Point WI-Grand Portage to Grand Marais MN-
Grand Marais to Taconite Harbor MN-
Taconite Harbor to Silver Bay Harbor MN-
Silver Bay Harbor to Two Harbors MN-Two Harbors to Duluth MN-
Duluth MN to Port Wing WI-Port Wing to Sand Island WI-
Sand Island to Bayfield WI-Oak Point to Saxon Harbor WI-
Outer Apostle Islands Beyond 5 NM from Mainland-
1004 PM CDT Mon Aug 17 2026
This Hazardous Weather Outlook is for portions of Lake Superior
and the Nearshore waters of western Lake Superior.
.DAY ONE...Tonight
Scattered thunderstorms are expected into tonight.
.DAYS TWO THROUGH SEVEN...Tuesday through Sunday
There is a slight chance for thunderstorms Thursday night into
Friday. Severe weather is not anticipated at this time.
$$
BJH
More information may be obtained at the following web address:
http://www.weather.gov/duluth
Hazardous Weather Outlook
National Weather Service Duluth MN
1004 PM CDT Mon Aug 17 2026
MNZ010>012-018>021-025-026-033>038-WIZ001>004-006>009-190315-
Koochiching-North St. Louis-Northern Cook/Northern Lake-
North Itasca-Central St. Louis-Southern Lake/North Shore-
Southern Cook/North Shore-North Cass-South Itasca-South Cass-
Crow Wing-Northern Aitkin-South Aitkin-Carlton/South St. Louis-
Pine-Douglas-Bayfield-Ashland-Iron-Burnett-Washburn-Sawyer-Price-
1004 PM CDT Mon Aug 17 2026
This Hazardous Weather Outlook is for portions of northeast
Minnesota and northwest Wisconsin.
.DAY ONE...Tonight
Scattered thunderstorms are likely into tonight.
Patchy dense fog returns tonight.
.DAYS TWO THROUGH SEVEN...Tuesday through Sunday
Patchy dense fog lingers into early Tuesday morning.
There is a slight chance for isolated thunderstorms Tuesday
afternoon into early evening in far southern portions of the
Northland. Severe weather is not expected.
There will be additional chances for scattered storms Thursday
evening into Friday.
.SPOTTER INFORMATION STATEMENT...
Skywarn spotter activation is not anticipated tonight.
$$
Hazardous Weather Outlook
National Weather Service Twin Cities/Chanhassen MN
312 PM CDT Mon Aug 17 2026
MNZ053-062-063-070-077-078-085-093-WIZ014>016-023>028-182015-
Chisago-Ramsey-Washington-Dakota-Rice-Goodhue-Steele-Freeborn-
Polk-Barron-Rusk-St. Croix-Pierce-Dunn-Pepin-Chippewa-Eau Claire-
312 PM CDT Mon Aug 17 2026
This Hazardous Weather Outlook is for portions of east central
Minnesota...south central Minnesota...southeast Minnesota...
northwest Wisconsin and west central Wisconsin.
.DAY ONE...Tonight.
There is a chance of thunderstorms late. Severe weather is not
anticipated.
.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.
Chances of showers and thunderstorms will return periodically
through the weekend. The probability of severe weather is low.
.SPOTTER INFORMATION STATEMENT...
SKYWARN spotter activation will not be needed.
$$
Borghoff
Hazardous Weather Outlook
National Weather Service Green Bay WI
1230 PM CDT Mon Aug 17 2026
WIZ005-010>013-018>022-030-031-035>040-045-048>050-073-074-181730-
Vilas-Oneida-Forest-Florence-Northern Marinette County-Lincoln-
Langlade-Menominee-Northern Oconto County-Door-Marathon-Shawano-
Wood-Portage-Waupaca-Outagamie-Brown-Kewaunee-Waushara-Winnebago-
Calumet-Manitowoc-Southern Marinette County-
Southern Oconto County-
1230 PM CDT Mon Aug 17 2026
This Hazardous Weather Outlook is for north-central and northeast
Wisconsin.
.DAY ONE...Tonight
There is a slight chance of thunderstorms late tonight.
.DAYS TWO THROUGH SEVEN...Tuesday through Monday
There is a chance of thunderstorms Tuesday afternoon into Tuesday
evening. An isolated strong or severe storm with hail and gusty
winds will be possible, especially south of Highway 10. The risk
for excessive rain is low.
The next chance for thunderstorms is Thursday night into Friday,
though confidence in storm severity is low.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be needed tonight.
$$
