890 FZUS73 KGRB 271601 MWSGRB Marine Weather Statement National Weather Service Green Bay WI 1101 AM CDT Mon Jul 27 2026 LMZ542-565-567-271645- /O.CON.KGRB.MA.W.0049.000000T0000Z-260727T1645Z/ 1101 AM CDT Mon Jul 27 2026 ...SPECIAL MARINE WARNING REMAINS IN EFFECT UNTIL 1145 AM CDT... For the following areas... Nearshore waters from Sturgeon Bay to Two Rivers... Open waters of Lake Michigan from Sturgeon Bay to Sheboygan... At 1101 AM CDT, a severe thunderstorm capable of producing waterspouts was located 17 NM southeast of Kewaunee Pierhead Light, moving southeast at 25 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 1542Z 298DEG 26KT 4442 8731 WATERSPOUT...POSSIBLE MAX HAIL SIZE...>.75 IN MAX WIND GUST...50 KTS $$ KS 917 FZUS73 KGRR 271602 MWSGRR Marine Weather Statement National Weather Service Grand Rapids MI 1202 PM EDT Mon Jul 27 2026 LMZ846-847-872-874-271612- /O.CAN.KGRR.MA.W.0057.000000T0000Z-260727T1630Z/ 1202 PM EDT Mon Jul 27 2026 ...THE SPECIAL MARINE WARNING IS CANCELLED... The affected areas were... Nearshore and Open Waters from Holland to Whitehall MI... The thunderstorm has weakened and no longer poses a significant threat to boaters. LAT...LON 4322 8709 4326 8639 4305 8626 4278 8621 4279 8704 TIME...MOT...LOC 1559Z 321DEG 38KT 4286 8644 $$ 04 175 FZUS73 KGRB 271609 MWSGRB Marine Weather Statement National Weather Service Green Bay WI 1109 AM CDT Mon Jul 27 2026 LMZ521-522-271715- /O.CON.KGRB.MA.W.0050.000000T0000Z-260727T1715Z/ 1109 AM CDT Mon Jul 27 2026 ...SPECIAL MARINE WARNING REMAINS IN EFFECT UNTIL 1215 PM CDT... For the following areas... Central and Southern Bay of Green Bay... At 1109 AM CDT, severe thunderstorms were located along a line from near Egg Harbor to near Oconto, or along a line from 9 NM south of Chambers Island to 10 NM north of Green Bay Harbor Entrance Light, 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... Peshtigo Reef Light and Oconto around 1110 AM CDT. Egg Harbor around 1115 AM CDT. Sherwood Point Light and Green Bay Harbor Entrance Light around 1120 AM CDT. Bay Shore Park 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 322DEG 35KT 4523 8758 4509 8781 4501 8809 MAX HAIL SIZE...<.75 IN MAX WIND GUST...>50 KTS $$ KS 111 FZUS73 KAPX 271621 MWSAPX Marine Weather Statement National Weather Service Gaylord MI 1221 PM EDT Mon Jul 27 2026 LMZ346-364-366-271631- /O.CAN.KAPX.MA.W.0091.000000T0000Z-260727T1645Z/ 1221 PM EDT Mon Jul 27 2026 ...THE SPECIAL MARINE WARNING IS CANCELLED... The affected areas were... Lake Michigan from Charlevoix to Point Betsie MI 5NM Offshore to mid lake... Lake Michigan from Point Betsie to Manistee MI 5NM offshore to Mid Lake... Manistee to Point Betsie MI... The thunderstorm has weakened and no longer poses a significant threat to boaters. && LAT...LON 4440 8675 4481 8648 4476 8623 4472 8618 4474 8614 4473 8607 4467 8619 4456 8616 4441 8619 4424 8629 TIME...MOT...LOC 1617Z 284DEG 40KT 4453 8582 $$ msb 640 FZUS73 KGRB 271627 MWSGRB Marine Weather Statement National Weather Service Green Bay WI 1127 AM CDT Mon Jul 27 2026 LMZ521-522-271715- /O.CON.KGRB.MA.W.0050.000000T0000Z-260727T1715Z/ 1127 AM CDT Mon Jul 27 2026 ...SPECIAL MARINE WARNING REMAINS IN EFFECT UNTIL 1215 PM CDT... For the following areas... Central and Southern Bay of Green Bay... At 1127 AM CDT, severe thunderstorms were located along a line from 6 NM southwest of Sherwood Point Light to over Long Tail Point Light, moving south 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... Bay Shore Park, Long Tail Point Light and Green Bay Harbor Entrance Light around 1130 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 4493 8784 4501 8734 4491 8741 4488 8739 4488 8744 4489 8744 4489 8742 4490 8744 4487 8747 4484 8761 4472 8772 4465 8776 4462 8787 4454 8793 4455 8802 4462 8801 4460 8798 4471 8799 4487 8783 TIME...MOT...LOC 1609Z 340DEG 34KT 4498 8759 4484 8782 4475 8809 MAX HAIL SIZE...<.75 IN MAX WIND GUST...>50 KTS $$ KS 603 FZUS73 KAPX 271649 MWSAPX Marine Weather Statement National Weather Service Gaylord MI 1249 PM EDT Mon Jul 27 2026 LHZ349-362-271657- /O.CAN.KAPX.MA.W.0092.000000T0000Z-260727T1800Z/ 1249 PM EDT Mon Jul 27 2026 ...THE SPECIAL MARINE WARNING IS CANCELLED... The affected areas were... Lake Huron from Presque Isle Lt. to Sturgeon Point MI 5NM off shore to US/Canadian border... Sturgeon Pt to Alabaster MI... The thunderstorm has moved out of the warned area and no longer poses a significant threat to boaters. More thunderstorms are developing over Alcona County and may necessitate another Special Marine Warning issuance. Be sure to monitor weather sources for more information. && LAT...LON 4454 8298 4459 8245 4418 8232 4418 8291 TIME...MOT...LOC 1647Z 329DEG 33KT 4422 8270 $$ LHZ363-271800- /O.CON.KAPX.MA.W.0092.000000T0000Z-260727T1800Z/ 1249 PM EDT Mon Jul 27 2026 ...A SPECIAL MARINE WARNING REMAINS IN EFFECT UNTIL 200 PM EDT... For the following areas... Lake Huron from Sturgeon Point to Alabaster MI 5NM off shore to US/Canadian border... At 1247 PM EDT, a severe thunderstorm was located 12 nm west of Central Lake Huron Buoy, moving southeast at 35 knots. HAZARD...Wind gusts 34 knots or greater and large hail. SOURCE...Radar indicated. IMPACT...Small craft could be damaged in briefly higher winds and suddenly higher waves. Large hail could result in structural damage. Locations impacted include... Central Lake Huron Buoy. PRECAUTIONARY/PREPAREDNESS ACTIONS... Move to safe harbor until hazardous weather passes. && LAT...LON 4454 8298 4459 8245 4418 8232 4418 8291 TIME...MOT...LOC 1647Z 329DEG 33KT 4422 8270 HAIL...>.75IN WIND...>34KTS $$ Dippman 414 FZUS73 KDTX 271649 MWSDTX Marine Weather Statement National Weather Service Detroit/Pontiac MI 1249 PM EDT Mon Jul 27 2026 LHZ441-462-271800- /O.CON.KDTX.MA.W.0062.000000T0000Z-260727T1800Z/ 1249 PM EDT Mon Jul 27 2026 ...A SPECIAL MARINE WARNING REMAINS IN EFFECT UNTIL 200 PM EDT... For the following areas... Lake Huron from Port Austin to Harbor Beach 5NM Off Shore to the US/Canadian border... Port Austin to Harbor Beach MI... At 1248 PM EDT, a severe thunderstorm was located 14 nm northeast of Port Austin, moving south at 20 knots. HAZARD...Wind gusts to 40 knots and large hail. SOURCE...Radar indicated. IMPACT...Small craft could be damaged in briefly higher winds and suddenly higher waves. Large hail could result in structural damage. Locations impacted include... Port Hope, Harbor Beach, and Port Austin. PRECAUTIONARY/PREPAREDNESS ACTIONS... Boaters should seek safe harbor immediately until this storm passes. Wind gusts to 40 knots, large hail, high waves, dangerous lightning, and heavy rain are possible with this storm. Frequent lightning is occurring with this storm. If caught on the open water stay below deck if possible, keep away from ungrounded metal objects. && LAT...LON 4418 8226 4385 8218 4384 8270 4399 8280 4404 8291 4400 8300 4405 8301 4405 8300 4418 8300 TIME...MOT...LOC 1648Z 354DEG 22KT 4421 8276 HAIL...>.75IN WIND...40KTS $$ AA 417 FZUS73 KLOT 271654 MWSLOT Marine Weather Statement National Weather Service Chicago/Romeoville 1154 AM CDT Mon Jul 27 2026 LMZ740-741-777-779-271845- /O.CON.KLOT.MA.W.0057.000000T0000Z-260727T1845Z/ 1154 AM CDT Mon Jul 27 2026 ...A SPECIAL MARINE WARNING REMAINS IN EFFECT UNTIL 145 PM CDT... For the following areas... Nearshore Waters from Winthrop Harbor to Northerly Island... Open Waters from Winthrop Harbor to Michigan City out to Mid Lake... At 1153 AM CDT, numerous severe thunderstorms were moving along the Lake Michigan shoreline, southeast at around 20 knots. HAZARD...Wind gusts to nearly 50 knots and large hail. SOURCE...Radar indicated. 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... Boaters should seek safe harbor immediately until this storm passes. Wind gusts to nearly 50 knots, large hail, high waves, dangerous lightning, and heavy rain are possible with this storm. && 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 1653Z 268DEG 18KT 4229 8782 HAIL...>.75IN WIND...49KTS $$ Borchardt 444 FZUS73 KAPX 271657 MWSAPX Marine Weather Statement National Weather Service Gaylord MI 1257 PM EDT Mon Jul 27 2026 LHZ363-271800- /O.CON.KAPX.MA.W.0092.000000T0000Z-260727T1800Z/ 1257 PM EDT Mon Jul 27 2026 ...A SPECIAL MARINE WARNING REMAINS IN EFFECT UNTIL 200 PM EDT... For the following areas... Lake Huron from Sturgeon Point to Alabaster MI 5NM off shore to US/Canadian border... At 1257 PM EDT, a severe thunderstorm was located 12 nm southwest of Central Lake Huron Buoy, moving southeast at 20 knots. HAZARD...Wind gusts 34 knots or greater and large hail. SOURCE...Radar indicated. IMPACT...Small craft could be damaged in briefly higher winds and suddenly higher waves. Large hail could result in structural damage. Locations impacted include... Central Lake Huron Buoy. PRECAUTIONARY/PREPAREDNESS ACTIONS... Move to safe harbor until hazardous weather passes. && LAT...LON 4420 8291 4442 8240 4418 8232 4418 8291 TIME...MOT...LOC 1657Z 337DEG 21KT 4416 8267 HAIL...>.75IN WIND...>34KTS $$ msb