FZUS63 KDTX 211345 GLFLH Open Lake Forecast for Lake Huron National Weather Service Detroit/Pontiac MI 945 AM EDT Tue Apr 21 2026 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 weak low pressure system will pass through Southeast Michigan this afternoon and evening. There is a chance of showers and storms across the south and is followed by an area of high pressure at 30.00 inches on Wednesday. A warm front slowly lifts into the area late Thursday into Friday as the parent low pressure stalls over the upper Midwest. LHZ361>363-212145- 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- Lake Huron from Sturgeon Point to Alabaster MI beyond 5NM off shore- 945 AM EDT Tue Apr 21 2026 .REST OF TODAY...South winds 15 to 20 knots decreasing to 10 to 15 knots in the afternoon. Waves 5 to 7 feet. Waves occasionally around 10 feet. .TONIGHT...North winds 5 to 10 knots. Waves 3 to 5 feet subsiding to 1 to 3 feet after midnight. .WEDNESDAY...North winds 5 to 10 knots until late afternoon becoming light and variable. Waves 2 feet or less. .WEDNESDAY NIGHT...Light and variable winds. Waves 2 feet or less. .THURSDAY...East winds 5 to 10 knots increasing to 10 to 15 knots. Waves 1 to 3 feet building to 3 to 5 feet. .FRIDAY...East winds 15 to 20 knots. Showers likely . Waves 5 to 7 feet. Waves occasionally around 10 feet. .SATURDAY...Northeast winds 15 to 20 knots becoming north 10 to 15 knots. A chance of showers until afternoon. Waves 4 to 6 feet. Waves occasionally around 8 feet. $$ LHZ462>464-212145- Lake Huron from Port Austin to Harbor Beach beyond 5NM Off Shore- Lake Huron from Harbor Beach to Port Sanilac beyond 5NM Off Shore- Lake Huron from Port Sanilac to Port Huron beyond 5NM Off Shore- 945 AM EDT Tue Apr 21 2026 .REST OF TODAY...South winds 15 to 20 knots decreasing to 10 to 15 knots late in the afternoon. Sprinkles. Waves 4 to 6 feet. .TONIGHT...South winds 5 to 10 knots. Waves 2 to 4 feet subsiding to 1 to 3 feet in the late evening and overnight. Waves occasionally around 8 feet. .WEDNESDAY...North winds 5 to 10 knots. Waves 2 feet or less. .WEDNESDAY NIGHT...North winds 5 to 10 knots early in the evening becoming light and variable. Waves 2 feet or less. .THURSDAY...Southeast winds 5 to 10 knots becoming east 10 to 15 knots late in the afternoon. Waves 2 feet or less. .FRIDAY...Southeast winds 10 to 15 knots. Showers likely . Waves 1 to 3 feet building to 2 to 4 feet . .SATURDAY...East winds 10 to 15 knots backing to the northeast in the late morning and early afternoon...then becoming north 5 to 10 knots . Showers likely early in the morning...then a chance of showers in the late morning and early afternoon. Waves 2 to 4 feet. $$ LHZ461-212145- MAFOR 2115/ HURON NORTH 11420 11410 11500 11700 13800 11100. Waves 4 to 6 feet this afternoon. Waves 2 to 4 feet. Occasional wave height around 8 feet tonight. Waves 2 feet or less Wednesday morning. HURON SOUTH 11420 11410 11400 11300 14800. Waves 5 to 7 feet subsiding to 3 to 5 feet. Occasional wave height around 10 feet this afternoon. Waves 2 to 4 feet subsiding to 2 feet or less tonight. Waves 2 feet or less Wednesday morning. $$ KDK 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)