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Severe · Special Marine WarningThis alert has expired. It is kept for reference.

Special Marine Warning issued September 2 at 8:07PM EDT until September 2

Affecting Sodus Bay to Mexico Bay NY; Mexico Bay NY to the St. Lawrence River; Sodus Bay to Mexico Bay NY beyond 5NM off shoreline to US-Canadian border; Mexico Bay NY to the St. Lawrence River beyond 5NM off shoreline to US-Canadian border; St. Lawrence River above Ogdensburg NY

In effect until: Sep 3, 2026, 1:00 AM

Sodus Bay to Mexico Bay NY; Mexico Bay NY to the St. Lawrence River; Sodus Bay to Mexico Bay NY beyond 5NM off shoreline to US-Canadian border; Mexico Bay NY to the St. Lawrence River beyond 5NM off shoreline to US-Canadian border; St. Lawrence River above Ogdensburg NY

Likely impact; effects through 1:00 AM.

Stay indoors, monitor local alerts, and follow instructions from local officials.

Read the original bulletin (official text)
SMWBUF

The National Weather Service in Buffalo has issued a

* Special Marine Warning for...
Lake Ontario from Mexico Bay to the Saint Lawrence River
The Saint Lawrence River from Cape Vincent to Alexandria Bay...

* Until 900 PM EDT.

* At 805 PM EDT, a severe thunderstorm capable of producing
waterspouts was located 11 nm southwest of Tibbets Point, or 29 nm
northwest of Mexico Bay, moving southeast at 35 knots.

HAZARD...Waterspouts and wind gusts 34 knots or greater.

SOURCE...Radar.

IMPACT...Waterspouts can easily overturn boats and create locally
hazardous seas. Small craft could be damaged in briefly
higher winds and suddenly higher waves.

* Locations impacted include...
Pillar Point, Alexandria Bay, Mexico Bay, Southwick Beach,
Henderson Harbor, Wellesley Island, Westcott Beach, Chaumont Bay,
Selkirk Beach, Stony Point, Clayton, Sandy Island Beach, Black
River Bay, Tibbets Point, Sackets Harbor, North Pond, St. Lawrence
River, and Cape Vincent.
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Alert data: U.S. National Weather Service / NOAA · Translation: WeatherTranslate™