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Home Return to list Ice Accretion Watch 0001 Issued by the Detroit / Pontiac Forecast Office
Action: Continued Issued At: 2026-02-04 20:53:57 896 WHUS73 KDTX 050253 MWWDTX URGENT - MARINE WEATHER MESSAGE National Weather Service Detroit/Pontiac MI 953 PM EST Wed Feb 4 2026 LHZ362-363-462-051515- /O.CON.KDTX.GL.A.0003.260206T1800Z-260207T0900Z/ /O.CON.KDTX.UP.A.0001.260206T1800Z-260207T0900Z/ Lake Huron from Presque Isle Light to Sturgeon Point MI beyond 5NM off shore- Lake Huron from Sturgeon Point to Alabaster MI beyond 5NM off shore- Lake Huron from Port Austin to Harbor Beach beyond 5NM Off Shore- 953 PM EST Wed Feb 4 2026 ...GALE WATCH REMAINS IN EFFECT FROM FRIDAY AFTERNOON THROUGH LATE FRIDAY NIGHT... ...HEAVY FREEZING SPRAY WATCH REMAINS IN EFFECT FROM FRIDAY AFTERNOON THROUGH LATE FRIDAY NIGHT... * WHAT...During the Gale Watch, expect sustained winds up to 33 knots from the northwest with gusts up to 41 knots. The largest significant waves will be 8 feet with a potential maximum wave height of 11 feet. During the Heavy Freezing Spray Watch, heavy freezing spray at a rate of 2 cm per hour or greater possible, and may rapidly accumulate on vessels. * WHERE...Lake Huron from Presque Isle Light to Sturgeon Point MI beyond 5NM off shore, Lake Huron from Sturgeon Point to Alabaster MI beyond 5NM off shore and Lake Huron from Port Austin to Harbor Beach beyond 5NM Off Shore. * WHEN...The maximum winds are expected around 6 PM EST Friday with the largest waves expected around 8 PM EST Friday. * IMPACTS...Operating a vessel in heavy freezing spray is hazardous. Freezing spray may render mechanical and electronic components inoperative. Rapid ice accretion on decks and superstructures may result in a catastrophic loss of stability. Strong winds can cause hazardous waves which could capsize or damage vessels and reduce visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... Mariners should consider altering plans to avoid or mitigate hazardous accumulation of ice on their vessel. Mariners should consider altering plans to avoid possible hazardous conditions. Remain in port, seek safe harbor, alter course, and/or secure the vessel for severe wind and waves. && $$ LHZ441>443-463-464-051515- /O.CON.KDTX.GL.A.0003.260206T1800Z-260207T0900Z/ Port Austin to Harbor Beach MI-Harbor Beach to Port Sanilac MI- Port Sanilac to Port Huron MI- Lake Huron from Harbor Beach to Port Sanilac beyond 5NM Off Shore- Lake Huron from Port Sanilac to Port Huron beyond 5NM Off Shore- 953 PM EST Wed Feb 4 2026 ...GALE WATCH REMAINS IN EFFECT FROM FRIDAY AFTERNOON THROUGH LATE FRIDAY NIGHT... * WHAT...Expect sustained winds up to 33 knots from the northwest with gusts up to 41 knots possible. * WHERE...Port Austin to Harbor Beach MI, Harbor Beach to Port Sanilac MI, Port Sanilac to Port Huron MI, Lake Huron from Harbor Beach to Port Sanilac beyond 5NM Off Shore and Lake Huron from Port Sanilac to Port Huron beyond 5NM Off Shore. * WHEN...The maximum winds are expected around 8 PM EST Friday with the largest waves expected around. * IMPACTS...Strong winds can cause hazardous waves which could capsize or damage vessels and reduce visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... Mariners should consider altering plans to avoid possible hazardous conditions. Remain in port, seek safe harbor, alter course, and/or secure the vessel for severe wind and waves. && $$ LHZ361-051515- /O.CON.KDTX.UP.A.0001.260206T1800Z-260207T0900Z/ Lake Huron from 5NM east of Mackinac Bridge to Presque Isle Lt beyond 5 NM off shore- 953 PM EST Wed Feb 4 2026 ...HEAVY FREEZING SPRAY WATCH REMAINS IN EFFECT FROM FRIDAY AFTERNOON THROUGH LATE FRIDAY NIGHT... * WHAT...Heavy freezing spray at a rate of 2 cm per hour or greater possible, and may rapidly accumulate on vessels. * WHERE...Lake Huron from 5NM east of Mackinac Bridge to Presque Isle Lt beyond 5 NM off shore. * WHEN...The maximum winds are expected around 3 PM EST Friday with the largest waves expected around 7 PM EST Friday. * IMPACTS...Operating a vessel in heavy freezing spray is hazardous. Freezing spray may render mechanical and electronic components inoperative. Rapid ice accretion on decks and superstructures may result in a catastrophic loss of stability. PRECAUTIONARY/PREPAREDNESS ACTIONS... Mariners should consider altering plans to avoid or mitigate hazardous accumulation of ice on their vessel. && $$ Action: Continued Issued At: 2026-02-04 20:53:57 896 WHUS73 KDTX 050253 MWWDTX URGENT - MARINE WEATHER MESSAGE National Weather Service Detroit/Pontiac MI 953 PM EST Wed Feb 4 2026 LHZ362-363-462-051515- /O.CON.KDTX.GL.A.0003.260206T1800Z-260207T0900Z/ /O.CON.KDTX.UP.A.0001.260206T1800Z-260207T0900Z/ Lake Huron from Presque Isle Light to Sturgeon Point MI beyond 5NM off shore- Lake Huron from Sturgeon Point to Alabaster MI beyond 5NM off shore- Lake Huron from Port Austin to Harbor Beach beyond 5NM Off Shore- 953 PM EST Wed Feb 4 2026 ...GALE WATCH REMAINS IN EFFECT FROM FRIDAY AFTERNOON THROUGH LATE FRIDAY NIGHT... ...HEAVY FREEZING SPRAY WATCH REMAINS IN EFFECT FROM FRIDAY AFTERNOON THROUGH LATE FRIDAY NIGHT... * WHAT...During the Gale Watch, expect sustained winds up to 33 knots from the northwest with gusts up to 41 knots. The largest significant waves will be 8 feet with a potential maximum wave height of 11 feet. During the Heavy Freezing Spray Watch, heavy freezing spray at a rate of 2 cm per hour or greater possible, and may rapidly accumulate on vessels. * WHERE...Lake Huron from Presque Isle Light to Sturgeon Point MI beyond 5NM off shore, Lake Huron from Sturgeon Point to Alabaster MI beyond 5NM off shore and Lake Huron from Port Austin to Harbor Beach beyond 5NM Off Shore. * WHEN...The maximum winds are expected around 6 PM EST Friday with the largest waves expected around 8 PM EST Friday. * IMPACTS...Operating a vessel in heavy freezing spray is hazardous. Freezing spray may render mechanical and electronic components inoperative. Rapid ice accretion on decks and superstructures may result in a catastrophic loss of stability. Strong winds can cause hazardous waves which could capsize or damage vessels and reduce visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... Mariners should consider altering plans to avoid or mitigate hazardous accumulation of ice on their vessel. Mariners should consider altering plans to avoid possible hazardous conditions. Remain in port, seek safe harbor, alter course, and/or secure the vessel for severe wind and waves. && $$ LHZ441>443-463-464-051515- /O.CON.KDTX.GL.A.0003.260206T1800Z-260207T0900Z/ Port Austin to Harbor Beach MI-Harbor Beach to Port Sanilac MI- Port Sanilac to Port Huron MI- Lake Huron from Harbor Beach to Port Sanilac beyond 5NM Off Shore- Lake Huron from Port Sanilac to Port Huron beyond 5NM Off Shore- 953 PM EST Wed Feb 4 2026 ...GALE WATCH REMAINS IN EFFECT FROM FRIDAY AFTERNOON THROUGH LATE FRIDAY NIGHT... * WHAT...Expect sustained winds up to 33 knots from the northwest with gusts up to 41 knots possible. * WHERE...Port Austin to Harbor Beach MI, Harbor Beach to Port Sanilac MI, Port Sanilac to Port Huron MI, Lake Huron from Harbor Beach to Port Sanilac beyond 5NM Off Shore and Lake Huron from Port Sanilac to Port Huron beyond 5NM Off Shore. * WHEN...The maximum winds are expected around 8 PM EST Friday with the largest waves expected around. * IMPACTS...Strong winds can cause hazardous waves which could capsize or damage vessels and reduce visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... Mariners should consider altering plans to avoid possible hazardous conditions. Remain in port, seek safe harbor, alter course, and/or secure the vessel for severe wind and waves. && $$ LHZ361-051515- /O.CON.KDTX.UP.A.0001.260206T1800Z-260207T0900Z/ Lake Huron from 5NM east of Mackinac Bridge to Presque Isle Lt beyond 5 NM off shore- 953 PM EST Wed Feb 4 2026 ...HEAVY FREEZING SPRAY WATCH REMAINS IN EFFECT FROM FRIDAY AFTERNOON THROUGH LATE FRIDAY NIGHT... * WHAT...Heavy freezing spray at a rate of 2 cm per hour or greater possible, and may rapidly accumulate on vessels. * WHERE...Lake Huron from 5NM east of Mackinac Bridge to Presque Isle Lt beyond 5 NM off shore. * WHEN...The maximum winds are expected around 3 PM EST Friday with the largest waves expected around 7 PM EST Friday. * IMPACTS...Operating a vessel in heavy freezing spray is hazardous. Freezing spray may render mechanical and electronic components inoperative. Rapid ice accretion on decks and superstructures may result in a catastrophic loss of stability. PRECAUTIONARY/PREPAREDNESS ACTIONS... Mariners should consider altering plans to avoid or mitigate hazardous accumulation of ice on their vessel. && $$ Action: Continued Issued At: 2026-02-05 08:51:43 670 WHUS73 KDTX 051451 MWWDTX URGENT - MARINE WEATHER MESSAGE National Weather Service Detroit/Pontiac MI 951 AM EST Thu Feb 5 2026 LHZ362-363-462-060330- /O.CON.KDTX.GL.A.0003.260206T1800Z-260207T0900Z/ /O.CON.KDTX.UP.A.0001.260206T1800Z-260207T0900Z/ Lake Huron from Presque Isle Light to Sturgeon Point MI beyond 5NM off shore- Lake Huron from Sturgeon Point to Alabaster MI beyond 5NM off shore- Lake Huron from Port Austin to Harbor Beach beyond 5NM Off Shore- 951 AM EST Thu Feb 5 2026 ...GALE WATCH REMAINS IN EFFECT FROM FRIDAY AFTERNOON THROUGH LATE FRIDAY NIGHT... ...HEAVY FREEZING SPRAY WATCH REMAINS IN EFFECT FROM FRIDAY AFTERNOON THROUGH LATE FRIDAY NIGHT... * WHAT...During the Gale Watch, expect sustained winds up to 33 knots from the northwest with gusts up to 36 knots. The largest significant waves will be 9 feet with a potential maximum wave height of 13 feet. During the Heavy Freezing Spray Watch, heavy freezing spray at a rate of 2 cm per hour or greater possible, and may rapidly accumulate on vessels. * WHERE...Lake Huron from Presque Isle Light to Sturgeon Point MI beyond 5NM off shore, Lake Huron from Sturgeon Point to Alabaster MI beyond 5NM off shore and Lake Huron from Port Austin to Harbor Beach beyond 5NM Off Shore. * WHEN...The maximum winds are expected around 8 PM EST Friday with the largest waves expected around 9 PM EST Friday. * IMPACTS...Operating a vessel in heavy freezing spray is hazardous. Freezing spray may render mechanical and electronic components inoperative. Rapid ice accretion on decks and superstructures may result in a catastrophic loss of stability. Strong winds can cause hazardous waves which could capsize or damage vessels and reduce visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... Mariners should consider altering plans to avoid or mitigate hazardous accumulation of ice on their vessel. Mariners should consider altering plans to avoid possible hazardous conditions. Remain in port, seek safe harbor, alter course, and/or secure the vessel for severe wind and waves. && $$ LHZ441>443-463-464-060330- /O.CON.KDTX.GL.A.0003.260206T1800Z-260207T0900Z/ Port Austin to Harbor Beach MI-Harbor Beach to Port Sanilac MI- Port Sanilac to Port Huron MI- Lake Huron from Harbor Beach to Port Sanilac beyond 5NM Off Shore- Lake Huron from Port Sanilac to Port Huron beyond 5NM Off Shore- 951 AM EST Thu Feb 5 2026 ...GALE WATCH REMAINS IN EFFECT FROM FRIDAY AFTERNOON THROUGH LATE FRIDAY NIGHT... * WHAT...Expect sustained winds up to 33 knots from the northwest with gusts up to 38 knots. The largest significant waves will be 1 feet with a potential maximum wave height of 2 feet. * WHERE...Port Austin to Harbor Beach MI, Harbor Beach to Port Sanilac MI, Port Sanilac to Port Huron MI, Lake Huron from Harbor Beach to Port Sanilac beyond 5NM Off Shore and Lake Huron from Port Sanilac to Port Huron beyond 5NM Off Shore. * WHEN...The maximum winds are expected around 8 PM EST Friday with the largest waves expected around 3 AM EST Saturday. * IMPACTS...Strong winds can cause hazardous waves which could capsize or damage vessels and reduce visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... Mariners should consider altering plans to avoid possible hazardous conditions. Remain in port, seek safe harbor, alter course, and/or secure the vessel for severe wind and waves. && $$ LHZ361-060330- /O.CON.KDTX.UP.A.0001.260206T1800Z-260207T0900Z/ Lake Huron from 5NM east of Mackinac Bridge to Presque Isle Lt beyond 5 NM off shore- 951 AM EST Thu Feb 5 2026 ...HEAVY FREEZING SPRAY WATCH REMAINS IN EFFECT FROM FRIDAY AFTERNOON THROUGH LATE FRIDAY NIGHT... * WHAT...Heavy freezing spray at a rate of 2 cm per hour or greater possible, and may rapidly accumulate on vessels. * WHERE...Lake Huron from 5NM east of Mackinac Bridge to Presque Isle Lt beyond 5 NM off shore. * WHEN...The maximum winds are expected around 4 PM EST Friday with the largest waves expected around 5 PM EST Friday. * IMPACTS...Operating a vessel in heavy freezing spray is hazardous. Freezing spray may render mechanical and electronic components inoperative. Rapid ice accretion on decks and superstructures may result in a catastrophic loss of stability. PRECAUTIONARY/PREPAREDNESS ACTIONS... Mariners should consider altering plans to avoid or mitigate hazardous accumulation of ice on their vessel. && $$ Action: Continued Issued At: 2026-02-05 08:51:43 670 WHUS73 KDTX 051451 MWWDTX URGENT - MARINE WEATHER MESSAGE National Weather Service Detroit/Pontiac MI 951 AM EST Thu Feb 5 2026 LHZ362-363-462-060330- /O.CON.KDTX.GL.A.0003.260206T1800Z-260207T0900Z/ /O.CON.KDTX.UP.A.0001.260206T1800Z-260207T0900Z/ Lake Huron from Presque Isle Light to Sturgeon Point MI beyond 5NM off shore- Lake Huron from Sturgeon Point to Alabaster MI beyond 5NM off shore- Lake Huron from Port Austin to Harbor Beach beyond 5NM Off Shore- 951 AM EST Thu Feb 5 2026 ...GALE WATCH REMAINS IN EFFECT FROM FRIDAY AFTERNOON THROUGH LATE FRIDAY NIGHT... ...HEAVY FREEZING SPRAY WATCH REMAINS IN EFFECT FROM FRIDAY AFTERNOON THROUGH LATE FRIDAY NIGHT... * WHAT...During the Gale Watch, expect sustained winds up to 33 knots from the northwest with gusts up to 36 knots. The largest significant waves will be 9 feet with a potential maximum wave height of 13 feet. During the Heavy Freezing Spray Watch, heavy freezing spray at a rate of 2 cm per hour or greater possible, and may rapidly accumulate on vessels. * WHERE...Lake Huron from Presque Isle Light to Sturgeon Point MI beyond 5NM off shore, Lake Huron from Sturgeon Point to Alabaster MI beyond 5NM off shore and Lake Huron from Port Austin to Harbor Beach beyond 5NM Off Shore. * WHEN...The maximum winds are expected around 8 PM EST Friday with the largest waves expected around 9 PM EST Friday. * IMPACTS...Operating a vessel in heavy freezing spray is hazardous. Freezing spray may render mechanical and electronic components inoperative. Rapid ice accretion on decks and superstructures may result in a catastrophic loss of stability. Strong winds can cause hazardous waves which could capsize or damage vessels and reduce visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... Mariners should consider altering plans to avoid or mitigate hazardous accumulation of ice on their vessel. Mariners should consider altering plans to avoid possible hazardous conditions. Remain in port, seek safe harbor, alter course, and/or secure the vessel for severe wind and waves. && $$ LHZ441>443-463-464-060330- /O.CON.KDTX.GL.A.0003.260206T1800Z-260207T0900Z/ Port Austin to Harbor Beach MI-Harbor Beach to Port Sanilac MI- Port Sanilac to Port Huron MI- Lake Huron from Harbor Beach to Port Sanilac beyond 5NM Off Shore- Lake Huron from Port Sanilac to Port Huron beyond 5NM Off Shore- 951 AM EST Thu Feb 5 2026 ...GALE WATCH REMAINS IN EFFECT FROM FRIDAY AFTERNOON THROUGH LATE FRIDAY NIGHT... * WHAT...Expect sustained winds up to 33 knots from the northwest with gusts up to 38 knots. The largest significant waves will be 1 feet with a potential maximum wave height of 2 feet. * WHERE...Port Austin to Harbor Beach MI, Harbor Beach to Port Sanilac MI, Port Sanilac to Port Huron MI, Lake Huron from Harbor Beach to Port Sanilac beyond 5NM Off Shore and Lake Huron from Port Sanilac to Port Huron beyond 5NM Off Shore. * WHEN...The maximum winds are expected around 8 PM EST Friday with the largest waves expected around 3 AM EST Saturday. * IMPACTS...Strong winds can cause hazardous waves which could capsize or damage vessels and reduce visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... Mariners should consider altering plans to avoid possible hazardous conditions. Remain in port, seek safe harbor, alter course, and/or secure the vessel for severe wind and waves. && $$ LHZ361-060330- /O.CON.KDTX.UP.A.0001.260206T1800Z-260207T0900Z/ Lake Huron from 5NM east of Mackinac Bridge to Presque Isle Lt beyond 5 NM off shore- 951 AM EST Thu Feb 5 2026 ...HEAVY FREEZING SPRAY WATCH REMAINS IN EFFECT FROM FRIDAY AFTERNOON THROUGH LATE FRIDAY NIGHT... * WHAT...Heavy freezing spray at a rate of 2 cm per hour or greater possible, and may rapidly accumulate on vessels. * WHERE...Lake Huron from 5NM east of Mackinac Bridge to Presque Isle Lt beyond 5 NM off shore. * WHEN...The maximum winds are expected around 4 PM EST Friday with the largest waves expected around 5 PM EST Friday. * IMPACTS...Operating a vessel in heavy freezing spray is hazardous. Freezing spray may render mechanical and electronic components inoperative. Rapid ice accretion on decks and superstructures may result in a catastrophic loss of stability. PRECAUTIONARY/PREPAREDNESS ACTIONS... Mariners should consider altering plans to avoid or mitigate hazardous accumulation of ice on their vessel. && $$ Action: Upgraded Issued At: 2026-02-05 14:00:49 302 WHUS73 KDTX 052000 MWWDTX URGENT - MARINE WEATHER MESSAGE National Weather Service Detroit/Pontiac MI 300 PM EST Thu Feb 5 2026 LHZ362-363-462-060815- /O.UPG.KDTX.GL.A.0003.260206T1800Z-260207T0900Z/ /O.NEW.KDTX.GL.W.0006.260206T1800Z-260207T0900Z/ /O.UPG.KDTX.UP.A.0001.260206T1800Z-260207T0900Z/ /O.NEW.KDTX.UP.W.0004.260206T1800Z-260207T0900Z/ Lake Huron from Presque Isle Light to Sturgeon Point MI beyond 5NM off shore- Lake Huron from Sturgeon Point to Alabaster MI beyond 5NM off shore- Lake Huron from Port Austin to Harbor Beach beyond 5NM Off Shore- 300 PM EST Thu Feb 5 2026 ...GALE WARNING IN EFFECT FROM 1 PM FRIDAY TO 4 AM EST SATURDAY... ...HEAVY FREEZING SPRAY WARNING IN EFFECT FROM 1 PM FRIDAY TO 4 AM EST SATURDAY... * WHAT...During the Gale Warning, expect sustained winds up to 33 knots from the northwest with gusts up to 37 knots. The largest significant waves will be 9 feet with a potential maximum wave height of 13 feet. During the Heavy Freezing Spray Warning, heavy freezing spray at a rate of 2 cm per hour or greater expected, and may rapidly accumulate on vessels. * WHERE...Lake Huron from Presque Isle Light to Sturgeon Point MI beyond 5NM off shore, Lake Huron from Sturgeon Point to Alabaster MI beyond 5NM off shore and Lake Huron from Port Austin to Harbor Beach beyond 5NM Off Shore. * WHEN...The maximum winds are expected around 8 PM EST Friday with the largest waves expected around 9 PM EST Friday. * IMPACTS...Operating a vessel in heavy freezing spray is hazardous. Freezing spray may render mechanical and electronic components inoperative. Rapid ice accretion on decks and superstructures may result in a catastrophic loss of stability. Strong winds will cause hazardous waves which could capsize or damage vessels and reduce visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... Mariners should prepare for dangerous accumulation of ice on their vessel. If possible, remain in port, avoid the warning area or conduct mitigation. Mariners should alter plans to avoid these hazardous conditions. Remain in port, seek safe harbor, alter course, and/or secure the vessel for hazardous conditions. && $$ LHZ441>443-463-464-060815- /O.UPG.KDTX.GL.A.0003.260206T1800Z-260207T0900Z/ /O.NEW.KDTX.GL.W.0006.260206T1800Z-260207T0900Z/ Port Austin to Harbor Beach MI-Harbor Beach to Port Sanilac MI- Port Sanilac to Port Huron MI- Lake Huron from Harbor Beach to Port Sanilac beyond 5NM Off Shore- Lake Huron from Port Sanilac to Port Huron beyond 5NM Off Shore- 300 PM EST Thu Feb 5 2026 ...GALE WARNING IN EFFECT FROM 1 PM FRIDAY TO 4 AM EST SATURDAY... * WHAT...Expect sustained winds up to 33 knots from the northwest with gusts up to 39 knots. The largest significant waves will be 1 feet with a potential maximum wave height of 2 feet. * WHERE...Port Austin to Harbor Beach MI, Harbor Beach to Port Sanilac MI, Port Sanilac to Port Huron MI, Lake Huron from Harbor Beach to Port Sanilac beyond 5NM Off Shore and Lake Huron from Port Sanilac to Port Huron beyond 5NM Off Shore. * WHEN...The maximum winds are expected around 8 PM EST Friday with the largest waves expected around 3 AM EST Saturday. * IMPACTS...Strong winds will cause hazardous waves which could capsize or damage vessels and reduce visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... Mariners should alter plans to avoid these hazardous conditions. Remain in port, seek safe harbor, alter course, and/or secure the vessel for hazardous conditions. && $$ LHZ361-060815- /O.UPG.KDTX.UP.A.0001.260206T1800Z-260207T0900Z/ /O.NEW.KDTX.UP.W.0004.260206T1800Z-260207T0900Z/ Lake Huron from 5NM east of Mackinac Bridge to Presque Isle Lt beyond 5 NM off shore- 300 PM EST Thu Feb 5 2026 ...HEAVY FREEZING SPRAY WARNING IN EFFECT FROM 1 PM FRIDAY TO 4 AM EST SATURDAY... * WHAT...Heavy freezing spray at a rate of 2 cm per hour or greater expected, and may rapidly accumulate on vessels. * WHERE...Lake Huron from 5NM east of Mackinac Bridge to Presque Isle Lt beyond 5 NM off shore. * WHEN...The maximum winds are expected around 3 PM EST Friday with the largest waves expected around 5 PM EST Friday. * IMPACTS...Operating a vessel in heavy freezing spray is hazardous. Freezing spray may render mechanical and electronic components inoperative. Rapid ice accretion on decks and superstructures may result in a catastrophic loss of stability. PRECAUTIONARY/PREPAREDNESS ACTIONS... Mariners should prepare for dangerous accumulation of ice on their vessel. If possible, remain in port, avoid the warning area or conduct mitigation. && $$ Action: Upgraded Issued At: 2026-02-05 14:00:49 302 WHUS73 KDTX 052000 MWWDTX URGENT - MARINE WEATHER MESSAGE National Weather Service Detroit/Pontiac MI 300 PM EST Thu Feb 5 2026 LHZ362-363-462-060815- /O.UPG.KDTX.GL.A.0003.260206T1800Z-260207T0900Z/ /O.NEW.KDTX.GL.W.0006.260206T1800Z-260207T0900Z/ /O.UPG.KDTX.UP.A.0001.260206T1800Z-260207T0900Z/ /O.NEW.KDTX.UP.W.0004.260206T1800Z-260207T0900Z/ Lake Huron from Presque Isle Light to Sturgeon Point MI beyond 5NM off shore- Lake Huron from Sturgeon Point to Alabaster MI beyond 5NM off shore- Lake Huron from Port Austin to Harbor Beach beyond 5NM Off Shore- 300 PM EST Thu Feb 5 2026 ...GALE WARNING IN EFFECT FROM 1 PM FRIDAY TO 4 AM EST SATURDAY... ...HEAVY FREEZING SPRAY WARNING IN EFFECT FROM 1 PM FRIDAY TO 4 AM EST SATURDAY... * WHAT...During the Gale Warning, expect sustained winds up to 33 knots from the northwest with gusts up to 37 knots. The largest significant waves will be 9 feet with a potential maximum wave height of 13 feet. During the Heavy Freezing Spray Warning, heavy freezing spray at a rate of 2 cm per hour or greater expected, and may rapidly accumulate on vessels. * WHERE...Lake Huron from Presque Isle Light to Sturgeon Point MI beyond 5NM off shore, Lake Huron from Sturgeon Point to Alabaster MI beyond 5NM off shore and Lake Huron from Port Austin to Harbor Beach beyond 5NM Off Shore. * WHEN...The maximum winds are expected around 8 PM EST Friday with the largest waves expected around 9 PM EST Friday. * IMPACTS...Operating a vessel in heavy freezing spray is hazardous. Freezing spray may render mechanical and electronic components inoperative. Rapid ice accretion on decks and superstructures may result in a catastrophic loss of stability. Strong winds will cause hazardous waves which could capsize or damage vessels and reduce visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... Mariners should prepare for dangerous accumulation of ice on their vessel. If possible, remain in port, avoid the warning area or conduct mitigation. Mariners should alter plans to avoid these hazardous conditions. Remain in port, seek safe harbor, alter course, and/or secure the vessel for hazardous conditions. && $$ LHZ441>443-463-464-060815- /O.UPG.KDTX.GL.A.0003.260206T1800Z-260207T0900Z/ /O.NEW.KDTX.GL.W.0006.260206T1800Z-260207T0900Z/ Port Austin to Harbor Beach MI-Harbor Beach to Port Sanilac MI- Port Sanilac to Port Huron MI- Lake Huron from Harbor Beach to Port Sanilac beyond 5NM Off Shore- Lake Huron from Port Sanilac to Port Huron beyond 5NM Off Shore- 300 PM EST Thu Feb 5 2026 ...GALE WARNING IN EFFECT FROM 1 PM FRIDAY TO 4 AM EST SATURDAY... * WHAT...Expect sustained winds up to 33 knots from the northwest with gusts up to 39 knots. The largest significant waves will be 1 feet with a potential maximum wave height of 2 feet. * WHERE...Port Austin to Harbor Beach MI, Harbor Beach to Port Sanilac MI, Port Sanilac to Port Huron MI, Lake Huron from Harbor Beach to Port Sanilac beyond 5NM Off Shore and Lake Huron from Port Sanilac to Port Huron beyond 5NM Off Shore. * WHEN...The maximum winds are expected around 8 PM EST Friday with the largest waves expected around 3 AM EST Saturday. * IMPACTS...Strong winds will cause hazardous waves which could capsize or damage vessels and reduce visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... Mariners should alter plans to avoid these hazardous conditions. Remain in port, seek safe harbor, alter course, and/or secure the vessel for hazardous conditions. && $$ LHZ361-060815- /O.UPG.KDTX.UP.A.0001.260206T1800Z-260207T0900Z/ /O.NEW.KDTX.UP.W.0004.260206T1800Z-260207T0900Z/ Lake Huron from 5NM east of Mackinac Bridge to Presque Isle Lt beyond 5 NM off shore- 300 PM EST Thu Feb 5 2026 ...HEAVY FREEZING SPRAY WARNING IN EFFECT FROM 1 PM FRIDAY TO 4 AM EST SATURDAY... * WHAT...Heavy freezing spray at a rate of 2 cm per hour or greater expected, and may rapidly accumulate on vessels. * WHERE...Lake Huron from 5NM east of Mackinac Bridge to Presque Isle Lt beyond 5 NM off shore. * WHEN...The maximum winds are expected around 3 PM EST Friday with the largest waves expected around 5 PM EST Friday. * IMPACTS...Operating a vessel in heavy freezing spray is hazardous. Freezing spray may render mechanical and electronic components inoperative. Rapid ice accretion on decks and superstructures may result in a catastrophic loss of stability. PRECAUTIONARY/PREPAREDNESS ACTIONS... Mariners should prepare for dangerous accumulation of ice on their vessel. If possible, remain in port, avoid the warning area or conduct mitigation. && $$ | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||