


Great Lakes Forecast
Issued by NWS
Issued by NWS
212 FZUS63 KDTX 170753 GLFLH Open Lake Forecast for Lake Huron National Weather Service Detroit/Pontiac MI 353 AM EDT Thu Jul 17 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 compact low pressure system, 29.60 inches, moves through the Great Lakes this morning with showers and thunderstorms across marine areas. North to northwest winds behind this system will increase this afternoon, ranging from 20 to 25 knots. Broad high pressure brings light and variable winds on Friday before the next low pressure arrives on Saturday. LHZ361-362-171600- 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- 353 AM EDT Thu Jul 17 2025 .TODAY...North winds 10 to 15 knots increasing to 15 to 20 knots in the late morning and afternoon. Waves 4 to 6 feet building to 5 to 7 feet late in the afternoon. Waves occasionally around 10 feet. .TONIGHT...North winds 10 to 15 knots decreasing to 5 to 10 knots in the late evening and overnight. Waves 3 to 5 feet subsiding to 1 to 3 feet after midnight. .FRIDAY...Light and variable winds. Waves 2 feet or less. .FRIDAY NIGHT...East winds 5 to 10 knots veering to the south in the late evening and overnight. A chance of showers after midnight. Waves 2 feet or less. .SATURDAY...South winds 5 to 10 knots veering to the north late in the afternoon. A chance of showers. Waves 2 feet or less. .SUNDAY...Northwest winds 5 to 10 knots backing to the west early in the evening...then veering to the west 5 to 10 knots in the late evening and early morning. Waves 2 feet or less. .MONDAY...East winds 5 to 10 knots. Waves 2 feet or less. $$ LHZ363-171600- Lake Huron from Sturgeon Point to Alabaster MI beyond 5NM off shore- 353 AM EDT Thu Jul 17 2025 .TODAY...West winds 10 to 15 knots becoming northwest 15 to 20 knots in the late morning and afternoon. Waves 3 to 5 feet building to 5 to 7 feet in the afternoon. Waves occasionally around 10 feet. .TONIGHT...North winds 15 to 20 knots decreasing to 5 to 10 knots. Waves 4 to 6 feet subsiding to 1 to 3 feet early in the morning. Waves occasionally around 8 feet. .FRIDAY...Light and variable winds. Waves 2 feet or less. .FRIDAY NIGHT...Southeast winds 5 to 10 knots veering to the south after midnight. A chance of showers after midnight. Waves 2 feet or less. .SATURDAY...South winds 5 to 10 knots. Showers likely. A chance of thunderstorms late in the morning. A chance of showers late in the afternoon. Waves 2 feet or less. .SUNDAY...North winds 10 to 15 knots decreasing to 5 to 10 knots. Waves 2 feet or less. .MONDAY...East winds 5 to 10 knots increasing to 10 to 15 knots in the late evening and early morning. Waves 2 feet or less. $$ LHZ462>464-171600- 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- 353 AM EDT Thu Jul 17 2025 .TODAY...Southwest winds 10 to 15 knots becoming west 15 to 20 knots late in the morning...then veering to the northwest in the afternoon. Waves 1 to 3 feet building to 4 to 6 feet in the late morning and afternoon. Waves occasionally around 8 feet. .TONIGHT...North winds 15 to 20 knots decreasing to 5 to 10 knots. Waves 4 to 6 feet. Waves occasionally around 8 feet. .FRIDAY...Northeast winds 5 to 10 knots early in the morning becoming light and variable. Waves 1 to 3 feet. .FRIDAY NIGHT...Light and variable winds becoming east 5 to 10 knots in the late evening and early morning...then veering to the south after midnight. Waves 2 feet or less. .SATURDAY...South winds 5 to 10 knots. A chance of showers in the morning...then showers likely and a chance of thunderstorms late in the morning. A chance of showers late in the evening. Waves 2 feet or less. .SUNDAY...North winds 10 to 15 knots decreasing to 5 to 10 knots until early morning. Waves 1 to 3 feet. .MONDAY...East winds 5 to 10 knots. Waves 2 feet or less. $$ LHZ461-171600- MAFOR 1709/ HURON NORTH 11116 11810 12820 11810 11800 12700. Waves 2 to 4 feet today. Waves 1 to 3 feet tonight. HURON SOUTH 11616 11710 12720 11820 11810 12800. A chance of thunderstorms this morning. Waves 1 to 3 feet building to 4 to 6 feet. Occasional wave height around 8 feet today. Waves 3 to 5 feet subsiding to 1 to 3 feet tonight. $$ KGK 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)