750 FZUS73 KLOT 131228 MWSLOT Marine Weather Statement National Weather Service Chicago/Romeoville 728 AM CDT Sat Sep 13 2025 LMZ742>745-779-131330- 728 AM CDT Sat Sep 13 2025 ...STRONG THUNDERSTORMS OVER THE WATERS... The areas affected include... Nearshore Waters from Northerly Island to Calumet Harbor... Nearshore Waters from Calumet Harbor to Michigan City... Open Waters from Wilmette Harbor to Michigan City out to Mid Lake... At 727 AM CDT, Doppler radar indicated strong thunderstorms, capable of producing winds to around 30 knots. These thunderstorms were located along a line extending from 8 nm northeast of Harrison-Dever Crib to 8 nm west of Midway Airport, moving southeast at 30 knots. PRECAUTIONARY/PREPAREDNESS ACTIONS... Mariners can expect gusty winds to around 30 knots, locally higher waves, and lightning strikes. Boaters should seek safe harbor immediately until these storms pass. && LAT...LON 4162 8733 4164 8743 4166 8743 4167 8742 4168 8743 4167 8744 4169 8750 4175 8753 4178 8758 4179 8758 4182 8759 4200 8711 4212 8696 4179 8697 4172 8692 4165 8711 4165 8714 4163 8716 4162 8732 4161 8732 $$ Doom  033 WHUS52 KJAX 131229 SMWJAX AMZ470-472-131400- /O.NEW.KJAX.MA.W.0215.250913T1229Z-250913T1400Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Special Marine Warning National Weather Service Jacksonville FL 829 AM EDT Sat Sep 13 2025 The National Weather Service in Jacksonville has issued a * Special Marine Warning for... Waters from Altamaha Sound GA to Fernandina Beach FL from 20 to 60 NM... Waters from Fernandina Beach to St. Augustine FL from 20 to 60 NM... * Until 1000 AM EDT. * At 828 AM EDT, a strong thunderstorm was located 47 nm south of R2 Tower, moving southwest at 15 knots. HAZARD...Wind gusts 34 knots or greater. SOURCE...Radar. IMPACT...Small craft could be damaged in briefly higher winds and suddenly higher waves. * Locations impacted include... Tournament Reef, Casablanca Reef, and Anna Reef. PRECAUTIONARY/PREPAREDNESS ACTIONS... Move to safe harbor until hazardous weather passes. If your vessel is caught offshore, immediately secure for heavy weather. Ensure all crew members are wearing USCG approved Type I life jackets and nonessential crew are below decks. Deploy jack lines and harnesses if available. Check life saving equipment, including batteries on handheld radios, for readiness. && LAT...LON 2999 8085 3053 8107 3062 8092 3088 8040 3081 8038 3071 8043 3063 8043 3057 8041 3049 8040 3037 8037 TIME...MOT...LOC 1228Z 045DEG 13KT 3059 8046 HAIL...0.00IN WIND...>34KTS $$ SHASHY  243 WHUS53 KLOT 131237 SMWLOT LMZ741>745-779-131315- /O.NEW.KLOT.MA.W.0045.250913T1237Z-250913T1315Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Special Marine Warning National Weather Service Chicago/Romeoville 737 AM CDT Sat Sep 13 2025 The National Weather Service in Chicago has issued a * Special Marine Warning for... Nearshore Waters from Wilmette Harbor to Calumet Harbor... Nearshore Waters from Calumet Harbor to Michigan City... Open Waters from Wilmette Harbor to Michigan City out to Mid Lake... * Until 815 AM CDT. * At 736 AM CDT, strong thunderstorms were located along a line extending from 7 nm northeast of Harrison-Dever Crib to near Midway Airport, moving southeast at 30 knots. 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, Jackson Park Harbor, 31st Street Harbor, Monroe Harbor, Burns Harbor, Calumet Harbor, Marina Shores at Dune Harbor, 59th Street Marina, Indiana Harbor, and Diversy Harbor. PRECAUTIONARY/PREPAREDNESS ACTIONS... Move to safe harbor immediately as gusty winds and high waves are expected. && LAT...LON 4162 8733 4164 8742 4165 8744 4167 8742 4169 8750 4175 8753 4179 8758 4180 8758 4188 8762 4189 8760 4192 8763 4201 8745 4166 8708 4164 8712 4165 8714 4163 8716 4162 8732 4161 8732 TIME...MOT...LOC 1236Z 328DEG 30KT 4199 8743 4178 8782 HAIL...0.00IN WIND...40KTS $$ Doom  574 FZUS73 KLOT 131255 MWSLOT Marine Weather Statement National Weather Service Chicago/Romeoville 755 AM CDT Sat Sep 13 2025 LMZ741-131305- /O.CAN.KLOT.MA.W.0045.000000T0000Z-250913T1315Z/ 755 AM CDT Sat Sep 13 2025 ...THE SPECIAL MARINE WARNING IS CANCELLED... The affected areas were... Nearshore Waters from Wilmette Harbor to Northerly Island... The thunderstorms have moved out of the warned area and no longer pose a significant threat to boaters. && LAT...LON 4162 8733 4164 8742 4165 8744 4167 8742 4169 8750 4175 8753 4176 8755 4189 8732 4166 8708 4164 8712 4165 8714 4163 8716 4162 8732 4161 8732 TIME...MOT...LOC 1255Z 270DEG 30KT 4200 8723 4179 8762 $$ LMZ742>745-779-131315- /O.CON.KLOT.MA.W.0045.000000T0000Z-250913T1315Z/ 755 AM CDT Sat Sep 13 2025 ...A SPECIAL MARINE WARNING REMAINS IN EFFECT UNTIL 815 AM CDT... For the following areas... Nearshore Waters from Northerly Island to Calumet Harbor... Nearshore Waters from Calumet Harbor to Michigan City... Open Waters from Wilmette Harbor to Michigan City out to Mid Lake... At 755 AM CDT, strong thunderstorms were located along a line extending from 15 nm east of Harrison-Dever Crib to near 59th Street Marina, moving east at 30 knots. HAZARD...Wind gusts 34 knots or greater. SOURCE...Radar indicated. IMPACT...Small craft could be damaged in briefly higher winds and suddenly higher waves. Locations impacted include... Indiana Harbor, Calumet Harbor, Marina Shores at Dune Harbor, Hammond Marina, and Burns Harbor. PRECAUTIONARY/PREPAREDNESS ACTIONS... Move to safe harbor until hazardous weather passes. && LAT...LON 4162 8733 4164 8742 4165 8744 4167 8742 4169 8750 4175 8753 4176 8755 4189 8732 4166 8708 4164 8712 4165 8714 4163 8716 4162 8732 4161 8732 TIME...MOT...LOC 1255Z 270DEG 30KT 4200 8723 4179 8762 HAIL...0.00IN WIND...>34KTS $$ Doom