Expires:201707230900;;229445 FZUS63 KDTX 230203 GLFSC GLFLH Open Lake Forecast for Lake Huron National Weather Service Detroit/Pontiac MI 1001 PM EDT Sat Jul 22 2017 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 broad area of low pressure...29.70 inches...will slowly track across Lower Michigan through Sunday. The system will exit to the east Sunday night, pulling a cold front through the central Great Lakes late Sunday and Sunday night. High pressure...30.20 inches...then builds into the area Monday and Tuesday. LHZ442-230900- Harbor Beach to Port Sanilac MI- 1002 PM EDT Sat Jul 22 2017 .REST OF TONIGHT...East winds 5 to 10 knots. Mostly cloudy. Waves around 2 feet or less. .SUNDAY...East winds 5 to 10 knots increasing to 10 to 15 knots late in the morning...then becoming southeast 5 to 10 knots in the afternoon. Mostly cloudy. A chance of showers and thunderstorms in the late morning and afternoon. Waves around 2 feet or less. .SUNDAY NIGHT...Southeast winds 5 to 10 knots increasing to 10 to 15 knots in the late evening and overnight. Partly cloudy with a chance of showers and thunderstorms early in the evening...then mostly cloudy with a chance of light showers and a slight chance of thunderstorms in the late evening and overnight. Waves around 2 feet or less. .MONDAY...North winds 15 to 20 knots diminishing to 10 to 15 knots early in the afternoon...then increasing to 15 to 20 knots late in the afternoon. Mostly cloudy with a chance of light showers early in the morning...then partly cloudy in the late morning and afternoon. Waves 2 to 4 feet. See Lake Huron Open Lake Forecast for days 3 through 5. $$