


Special Marine Warning
Issued by NWS Chicago, IL
Issued by NWS Chicago, IL
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581 WHUS53 KLOT 161945 SMWLOT LMZ740>745-777-779-162145- /O.NEW.KLOT.MA.W.0025.250716T1945Z-250716T2145Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Special Marine Warning National Weather Service Chicago/Romeoville 245 PM CDT Wed Jul 16 2025 The National Weather Service in Chicago has issued a * Special Marine Warning for... 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... * Until 445 PM CDT. * At 244 PM CDT, strong thunderstorms were located along a line extending from 7 nm northwest of Elgin to 9 nm southwest of Aurora to 13 nm west of Joliet, moving northeast at 50 knots. Storms are expected to be near the lake on the Illinois side around 330 to 400 PM. HAZARD...Wind gusts to 40 knots. SOURCE...Radar. IMPACT...Small craft could be damaged in briefly higher winds and suddenly higher waves. * Locations impacted include... Harrison-Dever Crib, Burnham Harbor, Hammond Marina, Wilmette Harbor, Jackson Park Harbor, 31st Street Harbor, Monroe Harbor, Burns Harbor, Belmont Harbor, Calumet Harbor, Marina Shores at Dune Harbor, and 59th Street Marina. PRECAUTIONARY/PREPAREDNESS ACTIONS... && LAT...LON 4162 8733 4164 8743 4168 8743 4167 8747 4170 8751 4183 8760 4189 8762 4189 8760 4190 8762 4206 8767 4227 8783 4248 8780 4246 8702 4213 8696 4179 8697 4179 8696 4172 8691 4163 8716 4162 8732 4161 8732 TIME...MOT...LOC 1944Z 244DEG 50KT 4210 8844 4164 8842 4154 8843 4127 8863 HAIL...0.00IN WIND...40KTS $$ Carlaw