


Great Lakes Forecast
Issued by NWS
Issued by NWS
033 FZUS63 KDTX 160137 GLFLH Open Lake Forecast for Lake Huron National Weather Service Detroit/Pontiac MI 937 PM EDT Tue Jul 15 2025 For waters beyond five nautical miles off shore on Lake Huron Waves are the significant wave height - the average of the highest 1/3 of the wave spectrum. Occasional wave height is the average of the highest 1/10 of the wave spectrum. .SYNOPSIS...A hybrid cold front and low pressure trough, averaging 29.80 inches, moves into the Great Lakes Wednesday and Thursday which brings showers and thunderstorms to the marine zones. Strong to severe thunderstorms will be possible Wednesday afternoon and evening. North-northwest winds behind this system will increase on Thursday, ranging from 20-25 knots. LHZ361-362-160945- Lake Huron from 5NM east of Mackinac Bridge to Presque Isle Lt beyond 5 NM off shore- Lake Huron from Presque Isle Light to Sturgeon Point MI beyond 5NM off shore- 937 PM EDT Tue Jul 15 2025 .REST OF TONIGHT...South winds 10 to 15 knots decreasing to 5 to 10 knots after midnight. Waves 1 to 3 feet. .WEDNESDAY...South winds 5 to 10 knots backing to the east late in the afternoon. A chance of showers and thunderstorms in the afternoon. Some thunderstorms may produce heavy rainfall in the afternoon. Waves 1 to 3 feet. .WEDNESDAY NIGHT...Northeast winds 5 to 10 knots. Showers likely and a chance of thunderstorms. Some thunderstorms may produce heavy rainfall in the evening. Waves 2 feet or less. .THURSDAY...North winds 10 to 15 knots backing to the northwest in the late morning and afternoon. A chance of showers. Waves 1 to 3 feet building to 3 to 5 feet early in the afternoon. .THURSDAY NIGHT...North winds 10 to 15 knots decreasing to 5 to 10 knots in the late evening and overnight. Waves 2 to 4 feet subsiding to 1 to 3 feet in the late evening and overnight. .FRIDAY...North winds 5 to 10 knots in the morning becoming light and variable...then becoming southeast 5 to 10 knots late in the evening. Waves 2 feet or less. .SATURDAY...South winds 5 to 10 knots backing to the east until early morning. A chance of showers early in the evening. Waves 2 feet or less. .SUNDAY...Northeast winds 5 to 10 knots. Waves 2 feet or less. $$ LHZ363-160945- Lake Huron from Sturgeon Point to Alabaster MI beyond 5NM off shore- 937 PM EDT Tue Jul 15 2025 .REST OF TONIGHT...South winds 10 to 15 knots. Waves 1 to 3 feet. .WEDNESDAY...South winds 5 to 10 knots backing to the southeast late in the afternoon. A chance of showers in the afternoon. Waves 1 to 3 feet. .WEDNESDAY NIGHT...Southeast winds 5 to 10 knots backing to the east in the late evening and early morning...then veering to the south after midnight. A chance of showers and thunderstorms. Some thunderstorms may produce heavy rainfall in the evening. Waves 2 feet or less. .THURSDAY...Southwest winds 10 to 15 knots veering to the northwest in the late morning and early afternoon...then increasing to 15 to 20 knots early in the afternoon. A chance of showers. Waves 1 to 3 feet building to 3 to 5 feet early in the afternoon. .THURSDAY NIGHT...North winds 15 to 20 knots decreasing to 10 to 15 knots in the late evening and overnight. Waves 2 to 4 feet. .FRIDAY...Northeast winds 5 to 10 knots. Waves 2 feet or less. .SATURDAY...South winds 5 to 10 knots. A chance of showers until early morning. Waves 2 feet or less. .SUNDAY...North winds 5 to 10 knots. A chance of showers early in the morning. Waves 2 feet or less. $$ LHZ462>464-160945- Lake Huron from Port Austin to Harbor Beach beyond 5NM Off Shore- Lake Huron from Harbor Beach to Port Sanilac beyond 5NM Off Shore- Lake Huron from Port Sanilac to Port Huron beyond 5NM Off Shore- 937 PM EDT Tue Jul 15 2025 .REST OF TONIGHT...South winds 5 to 10 knots. Waves 2 feet or less. .WEDNESDAY...South winds 5 to 10 knots. A chance of showers and thunderstorms in the afternoon. Some thunderstorms may produce heavy rainfall in the afternoon. Waves 2 feet or less. .WEDNESDAY NIGHT...South winds 5 to 10 knots. A chance of showers and thunderstorms. Some thunderstorms may produce heavy rainfall in the evening. Waves 2 feet or less. .THURSDAY...South winds 5 to 10 knots becoming west 10 to 15 knots in the late morning and early afternoon...then veering to the northwest early in the afternoon. A chance of showers. Waves 1 to 3 feet building to 2 to 4 feet early in the afternoon. .THURSDAY NIGHT...North winds 15 to 20 knots decreasing to 10 to 15 knots in the late evening and overnight. Waves 2 to 4 feet. .FRIDAY...Northeast winds 10 to 15 knots decreasing to 5 to 10 knots. Waves 2 to 4 feet subsiding to 1 to 3 feet. .SATURDAY...Southeast winds 5 to 10 knots. A chance of showers until early morning. Waves 2 feet or less. .SUNDAY...Northeast winds 5 to 10 knots backing to the north until early morning. A chance of showers early in the morning. Waves 2 feet or less. $$ LHZ461-160945- MAFOR 1603/ HURON NORTH 12400 12500 11400 12300 11206. A chance of thunderstorms Wednesday afternoon and Wednesday evening. Waves 2 feet or less. HURON SOUTH 14400 11400 11300 12400. A chance of showers and thunderstorms Wednesday evening. Waves 2 feet or less. $$ JA Experimental modernized open lake forecast is available online at weather.gov/dtx/glftable (all lower case) Graphical marine forecasts are available online at weather.gov/greatlakes (all lower case)