The areas affected include...
Duluth MN to Port Wing WI...
Lake Superior west of a line from Saxon Harbor WI to Grand Portage
MN beyond 5NM...
Two Harbors to Duluth MN...
At 945 PM CDT, Doppler radar indicated a strong thunderstorm, capable
of producing winds to around 30 knots and small hail. This
thunderstorm was located 14 nm southwest of Barkers Island, or 16 nm
southwest of Duluth Lift Bridge Channel, moving northeast at 35
knots.
The strong thunderstorm will be near...
Barkers Island, Superior Harbor, Duluth Harbor, and Superior Entry
around 1000 PM CDT.
Duluth Lift Bridge Channel around 1005 PM CDT.
Other locations impacted by the strong thunderstorm include Superior
Entry.
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Mariners can expect gusty winds to around 30 knots, locally higher
waves, and lightning strikes. Boaters should seek safe harbor
immediately until this storm passes.