Expires:201707230900;;229443 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. LHZ421-230900- Outer Saginaw Bay SW of Alabaster to Port Austin MI to Inner Saginaw Bay- 1002 PM EDT Sat Jul 22 2017 .REST OF TONIGHT...Northeast winds 10 to 15 knots becoming east 5 to 10 knots early in the morning. Mostly cloudy. Waves around 2 feet or less. .SUNDAY...East winds 10 to 15 knots diminishing to 5 to 10 knots late in the afternoon. Mostly cloudy. Showers likely and a chance of thunderstorms in the late morning and afternoon. Waves 1 to 3 feet. .SUNDAY NIGHT...Northeast winds 10 to 15 knots increasing to 15 to 20 knots early in the morning. Partly cloudy early in the evening becoming mostly cloudy. Light showers likely and a chance of thunderstorms early in the evening...then a chance of light showers and a slight chance of thunderstorms in the late evening and overnight. Waves 1 to 3 feet building to 2 to 4 feet after midnight. .MONDAY...Northeast winds 15 to 20 knots. Mostly cloudy with a chance of light showers early in the morning...then partly cloudy in the late morning and afternoon. Waves 3 to 5 feet. Waves occasionally around 7 feet. A Small Craft Advisory may be needed. See Lake Huron Open Lake Forecast for days 3 through 5. $$