Special Marine Warning for Winthrop Harbor to Wilmette Harbor IL; Wilmette Harbor to Northerly Island IL; Northerly Island to Calumet Harbor IL +5 more

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Bulletin details

For the following areas... Nearshore Waters from Winthrop Harbor to Calumet Harbor... Nearshore Waters from Calumet Harbor to Michigan City... Open Waters from Winthrop Harbor to Michigan City out to Mid Lake... At 1041 AM CDT, severe thunderstorms capable of producing waterspouts were located along a line extending from 9 nm northeast of Elgin to 9 nm southwest of Midway Airport to 7 nm southeast of Joliet, moving east at 50 knots. HAZARD...Waterspouts and wind gusts in excess of 65 knots. SOURCE...Radar indicated. IMPACT...Waterspouts can easily overturn boats and create locally hazardous seas. Boats could suffer significant structural damage in high winds. Small craft could capsize in suddenly higher waves. In addition, rapid large fluctuations in water levels are possible as and after these storms pass. severe thunderstorms will be near... Montrose Harbor, Wilmette Harbor, Monroe Harbor, 31st Street Harbor, Calumet Harbor, Harrison-Dever Crib, Burnham Harbor, Belmont Harbor, Jackson Park Harbor, and Diversy Harbor around 1100 AM CDT. Indiana Harbor around 1105 AM CDT. Burns Harbor and Marina Shores at Dune Harbor around 1120 AM CDT. Michigan City around 1130 AM CDT.