Special Marine Warning issued June 22 at 2:09AM EDT until June 22 at 3:00AM EDT by NWS Buffalo NY

For the following areas…
Lake Ontario from near Cape Vincent…
The Saint Lawrence River from Cape Vincent to Ogdensburg…

At 208 AM EDT, a severe thunderstorm was located 27 nm east of
Wellesley Island, moving east at 50 knots.

HAZARD…Wind gusts in excess of 50 knots and large hail.

SOURCE…Radar indicated.

IMPACT…Boats could suffer significant structural damage in high
winds and hail. Small craft could capsize in suddenly
higher waves.

Locations impacted include…
Alexandria Bay, Wellesley Island, Clayton, and St. Lawrence River.