933 WHUS53 KMKX 271513 SMWMKX LMZ643>646-669-671-673-675-271715- /O.NEW.KMKX.MA.W.0059.260727T1513Z-260727T1715Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Special Marine Warning National Weather Service Milwaukee/Sullivan WI 1013 AM CDT Mon Jul 27 2026 The National Weather Service in Milwaukee/Sullivan has issued a * Special Marine Warning for... Lake Michigan nearshore and open waters to mid lake from Sheboygan WI to Winthrop Harbor IL... * Until 1215 PM CDT. * At 1012 AM CDT, severe thunderstorms were located along a line extending from 9 nm southwest of Oshkosh to 8 nm north of McHenry, moving east at 30 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. * Locations impacted include... All the nearshore waters and open lake. PRECAUTIONARY/PREPAREDNESS ACTIONS... Move to safe harbor until hazardous weather passes. && LAT...LON 4248 8779 4261 8782 4278 8775 4286 8784 4326 8791 4349 8779 4358 8778 4368 8770 4389 8773 4390 8759 4383 8709 4338 8715 4246 8703 TIME...MOT...LOC 1512Z 261DEG 29KT 4392 8871 4248 8835 HAIL...>.75IN WIND...>34KTS $$ GEHRING 264 WHUS53 KAPX 271517 SMWAPX LMZ345-346-364-366-271645- /O.NEW.KAPX.MA.W.0091.260727T1517Z-260727T1645Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Special Marine Warning National Weather Service Gaylord MI 1117 AM EDT Mon Jul 27 2026 The National Weather Service in Gaylord has issued a * Special Marine Warning for... Lake Michigan from Charlevoix to Point Betsie MI 5NM Offshore to mid lake... Lake Michigan from Point Betsie to Manistee MI 5NM offshore to Mid Lake... Manistee to Point Betsie MI... Point Betsie to Sleeping Bear Point MI... * Until 1245 PM EDT. * At 1114 AM EDT, a severe thunderstorm capable of producing large hail was located 17 nm southeast of Whitefish Point, moving east at 40 knots. This storm may split into two separate storms over the next hour or so, both of which would be capable of producing large hail and waterspouts. HAZARD...Waterspouts, wind gusts to 40 knots, and large destructive hail. SOURCE...Radar. IMPACT...Waterspouts can easily overturn boats and create locally hazardous seas. Small craft could be damaged in briefly higher winds and suddenly higher waves. Large hail could result in personal injury and significant structural damage. * Locations impacted include... Arcadia, Sleeping Bear Point, Empire, Point Betsie, Pierport, Glen Arbor, Portage Lake, Williamsport, and Frankfort. PRECAUTIONARY/PREPAREDNESS ACTIONS... Thunderstorms can produce sudden waterspouts. Waterspouts can easily overturn boats and create locally hazardous seas. Seek safe harbor immediately. && LAT...LON 4444 8687 4489 8668 4500 8607 4492 8604 4490 8601 4490 8598 4487 8597 4485 8602 4474 8603 4467 8619 4456 8616 4441 8619 4424 8629 TIME...MOT...LOC 1514Z 284DEG 40KT 4471 8686 WATERSPOUT...POSSIBLE HAIL...>2.0IN WIND...40KTS $$ FEF 298 WHUS53 KGRR 271531 SMWGRR LMZ846-847-872-874-271630- /O.NEW.KGRR.MA.W.0057.260727T1531Z-260727T1630Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Special Marine Warning National Weather Service Grand Rapids MI 1131 AM EDT Mon Jul 27 2026 The National Weather Service in Grand Rapids has issued a * Special Marine Warning for... Nearshore and Open Waters from Holland to Whitehall MI... * Until 1230 PM EDT. * At 1130 AM EDT, a strong thunderstorm was located 18 nm west of Muskegon Light, moving southeast at 40 knots. HAZARD...Wind gusts to 40 knots. SOURCE...Radar. IMPACT...Small craft could be damaged in briefly higher winds and suddenly higher waves. * The strong thunderstorm will remain over mainly open waters. LAT...LON 4322 8709 4326 8639 4305 8626 4278 8621 4279 8704 TIME...MOT...LOC 1530Z 321DEG 38KT 4312 8673 HAIL...0.00IN WIND...40KTS $$ 04 507 WHUS53 KGRB 271542 SMWGRB LMZ542-565-567-271645- /O.NEW.KGRB.MA.W.0049.260727T1542Z-260727T1645Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Special Marine Warning National Weather Service Green Bay WI 1042 AM CDT Mon Jul 27 2026 The National Weather Service in Green Bay has issued a * Special Marine Warning for... Nearshore waters from Sturgeon Bay to Two Rivers... Open waters of Lake Michigan from Sturgeon Bay to Sheboygan... * Until 1145 AM CDT. * At 1042 AM CDT, a severe thunderstorm capable of producing waterspouts was located 10 NM east of Kewaunee Pierhead Light, moving southeast at 30 knots. HAZARD...Waterspouts, large hail, and wind gusts to nearly 50 knots. SOURCE...Radar indicated. IMPACT...Waterspouts can easily overturn boats and create locally hazardous seas. Small craft could be damaged in briefly higher winds and suddenly higher waves. Large hail could result in structural damage. * This strong thunderstorm will remain over mainly open waters. PRECAUTIONARY/PREPAREDNESS ACTIONS... Move to safe harbor until hazardous weather passes. && LAT...LON 4437 8752 4446 8750 4447 8752 4448 8752 4447 8754 4453 8747 4461 8744 4463 8740 4470 8735 4457 8682 4427 8694 4413 8701 4396 8705 TIME...MOT...LOC 1541Z 294DEG 30KT 4443 8727 WATERSPOUT...POSSIBLE MAX HAIL SIZE...>.75 IN MAX WIND GUST...50 KTS $$ KS 484 WHUS53 KLOT 271542 SMWLOT LMZ740-741-777-779-271845- /O.NEW.KLOT.MA.W.0057.260727T1542Z-260727T1845Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Special Marine Warning National Weather Service Chicago/Romeoville 1042 AM CDT Mon Jul 27 2026 The National Weather Service in Chicago has issued a * Special Marine Warning for... Nearshore Waters from Winthrop Harbor to Northerly Island... Open Waters from Winthrop Harbor to Michigan City out to Mid Lake... * Until 145 PM CDT. * At 1041 AM CDT, strong thunderstorms were located over northeastern Illinois and were moving east at around 20 knots. They will reach the Lake Michigan shoreline between 1130 AM and 1200 PM. 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. * Locations impacted include... Harrison-Dever Crib, Wilmette Harbor, Winthrop Harbor, Montrose Harbor, Monroe Harbor, Waukegan Harbor, Belmont Harbor, Diversy Harbor, and DuSable Harbor. PRECAUTIONARY/PREPAREDNESS ACTIONS... Move to safe harbor until hazardous weather passes. && LAT...LON 4246 8702 4213 8696 4187 8697 4187 8761 4189 8762 4189 8760 4190 8762 4208 8768 4214 8775 4227 8783 4248 8780 TIME...MOT...LOC 1541Z 268DEG 18KT 4228 8831 HAIL...>.75IN WIND...>34KTS $$ Borchardt 503 WHUS53 KGRB 271545 SMWGRB LMZ521-522-271715- /O.NEW.KGRB.MA.W.0050.260727T1545Z-260727T1715Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Special Marine Warning National Weather Service Green Bay WI 1045 AM CDT Mon Jul 27 2026 The National Weather Service in Green Bay has issued a * Special Marine Warning for... Central and Southern Bay of Green Bay... * Until 1215 PM CDT. * At 1045 AM CDT, severe thunderstorms were located along a line from 15 NM north of Marinette to 12 NM south of Crivitz, or along a line from 14 NM northwest of Chambers Island to 19 NM west of Marinette, moving southeast at 35 knots. HAZARD...Wind gusts in excess of 50 knots. SOURCE...Radar indicated. IMPACT...Boats could suffer significant structural damage in high winds. Small craft could capsize in suddenly higher waves. * The strong thunderstorm will be near... Oconto around 1105 AM CDT. Peshtigo Reef Light and Chambers Island around 1110 AM CDT. Egg Harbor and Eagle Bluff Light around 1120 AM CDT. Sherwood Point Light around 1125 AM CDT. PRECAUTIONARY/PREPAREDNESS ACTIONS... Move to safe harbor until hazardous weather passes. Boaters should seek safe harbor immediately until these storms pass. Wind gusts 34 knots or greater, high waves, dangerous lightning, and heavy rain are possible with these storms. && LAT...LON 4507 8758 4515 8760 4541 8735 4540 8695 4519 8712 4517 8724 4488 8739 4484 8761 4465 8776 4454 8793 4455 8802 4462 8801 4460 8798 4471 8799 4487 8783 4493 8784 4498 8763 4498 8765 TIME...MOT...LOC 1545Z 316DEG 34KT 4534 8763 4513 8780 4504 8807 MAX HAIL SIZE...<.75 IN MAX WIND GUST...>50 KTS $$ KS