


Special Marine Warning
Issued by NWS Duluth, MN
Issued by NWS Duluth, MN
776 WHUS53 KDLH 041043 SMWDLH LSZ143>146-162-041115- /O.NEW.KDLH.MA.W.0019.250704T1043Z-250704T1115Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Special Marine Warning National Weather Service Duluth MN 543 AM CDT Fri Jul 4 2025 The National Weather Service in Duluth MN has issued a * Special Marine Warning for... Duluth MN to Port Wing WI... Lake Superior west of a line from Saxon Harbor WI to Grand Portage MN beyond 5NM... Port Wing to Sand Island WI... Silver Bay Harbor to Two Harbors MN... Two Harbors to Duluth MN... * Until 615 AM CDT. * At 542 AM CDT, a severe thunderstorm was located near Two Harbors Protected Access Agate Bay, or 24 nm northeast of Duluth Lift Bridge Channel, moving east at 20 knots. HAZARD...Wind gusts 34 knots or greater and large hail. SOURCE...Radar. IMPACT...Small craft could be damaged in briefly higher winds and suddenly higher waves. Large hail could result in structural damage. * The severe thunderstorm will remain over mainly open waters. PRECAUTIONARY/PREPAREDNESS ACTIONS... Frequent lightning is occurring with this storm. If caught on the open water stay below deck if possible, keep away from ungrounded metal objects. && LAT...LON 4684 9161 4699 9167 4715 9125 4690 9114 TIME...MOT...LOC 1042Z 252DEG 18KT 4695 9154 HAIL...>.75IN WIND...>34KTS $$ LE