Marine Weather Statement issued September 11 at 9:30PM CDT by NWS Duluth MN
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The areas affected include...
Chequamegon Bay-Bayfield to Oak Point WI...
Lake Superior west of a line from Saxon Harbor WI to Grand Portage
MN beyond 5NM...
Oak Point to Saxon Harbor WI...
Outer Apostle Islands Beyond 5 NM from Mainland...
Port Wing to Sand Island WI...
Sand Island to Bayfield WI...
At 928 PM CDT, Doppler radar indicated multiple strong
thunderstorms, capable of producing winds to around 20 knots and pea
size hail. These thunderstorms were located across the entire
Apostle Islands, moving east to northeast at 15 knots.
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Mariners can expect gusty winds to around 20 knots, locally higher
waves, pea size hail, and heavy downpours. Boaters should seek safe
harbor immediately until these storms pass.
Intense lightning is occurring with these storms. If caught on the
open water stay below deck if possible, keep away from ungrounded
metal objects.