FZUS63 KMKX 160833 GLFLM OPEN LAKE FORECAST for Lake Michigan National Weather Service Milwaukee/Sullivan WI 333 AM CDT Thu Apr 16 2026 FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON Lake Michigan. Waves are provided as a range of significant wave heights, which is the average of the highest 1/3 of the wave, along with the average height of the highest 10% of the waves which will occasionally be encountered. .SYNOPSIS... A stationary front will remains stalled the middle portion of the lake. It will slowly sink south to the southern end of the lake by noon today. While the front will be departing, light winds will support continued dense fog potential through tonight. Marine Dense Fog Advisory is now in effect until 7 AM Friday morning. Winds will become light and variable briefly tonight as a weak ridge passes over the lake, with winds then becoming southerly and breezy Friday ahead of low pressure of 29.6 inches approaching from the west. Gusty northwest winds then return following a cold front Friday night. Thunderstorms are possible Friday evening into Saturday morning. Some storms could be strong to severe, with gusty winds and large hail being the primary concerns. LMZ261-362-364-366-563-565-567-868-161515- Lake Michigan from Seul Choix Point to Rock Island Passage 5 NM offshore to Mid Lake- Lake Michigan South of a line from Seul Choix Point to the Mackinac Bridge and north of a line from Charlevoix MI to South Fox Island 5 NM offshore- Lake Michigan from Charlevoix to Point Betsie MI 5 NM offshore to Mid Lake- Lake Michigan from Point Betsie to Manistee MI 5 NM offshore to Mid Lake- Lake Michigan from Rock Island Passage to Sturgeon Bay WI- Lake Michigan from Sturgeon Bay to Two Rivers WI 5 NM offshore to Mid Lake- Lake Michigan from Two Rivers to Sheboygan WI 5 NM offshore to Mid Lake- Lake Michigan from Pentwater to Manistee MI 5 NM offshore to Mid Lake- 333 AM CDT Thu Apr 16 2026 SHEBOYGAN WI TO PENTWATER MI NORTH... ...DENSE FOG ADVISORY IN EFFECT UNTIL 7 AM CDT FRIDAY... .TODAY...North winds 5 to 10 kt becoming northwest. Chance of rain showers and slight chance of thunderstorms this morning. Areas of dense fog. Waves 1 to 2 ft. .TONIGHT...Southwest winds 10 to 15 kt becoming south 5 to 10 kt. Areas of fog in the evening, then areas of dense fog overnight. Waves 1 to 2 ft. .FRIDAY...South winds 10 to 15 kt becoming southeast 15 to 25 kt. Areas of dense fog in the morning. Waves 1 to 3 ft building to 4 to 6 ft occasionally to 8 ft. .FRIDAY NIGHT...South winds to 30 kt. Rain showers with a chance of thunderstorms. Waves 6 to 9 ft occasionally to 12 ft. .SATURDAY...West winds 15 to 25 kt. Rain showers in the morning, then chance of rain showers in the afternoon. Waves 5 to 8 ft occasionally to 10 ft subsiding to 4 to 6 ft occasionally to 8 ft. .SATURDAY NIGHT...Northwest winds 15 to 25 kt increasing to 30 kt. Waves 4 to 6 ft occasionally to 8 ft. .SUNDAY...Northwest winds to 30 kt. Waves 4 to 7 ft occasionally to 9 ft. .MONDAY...Southwest winds 10 to 20 kt becoming south. Waves 3 to 5 ft. $$ LMZ080-669-671-673-675-777-779-870-872-874-876-878-161515- Lake Michigan from Michigan City IN to St. Joseph MI 5 NM offshore to Mid Lake- Lake Michigan from Sheboygan to Port Washington WI 5 NM offshore to Mid Lake- Lake Michigan from Port Washington to North Point Light WI 5 NM offshore to Mid Lake- Lake Michigan from North Point Light to Wind Point WI 5 NM offshore to Mid Lake- Lake Michigan from Wind Point WI to Winthrop Harbor IL 5 NM offshore to Mid Lake- Lake Michigan from Winthrop Harbor to Wilmette Harbor IL 5 NM offshore to Mid Lake- Lake Michigan from Wilmette Harbor IL to Michigan City IN 5 NM offshore to Mid Lake- Lake Michigan from Whitehall to Pentwater MI 5 NM offshore to Mid Lake- Lake Michigan from Grand Haven to Whitehall MI 5 NM offshore to Mid Lake- Lake Michigan from Holland to Grand Haven MI 5 NM offshore to Mid Lake- Lake Michigan from South Haven to Holland MI 5 NM offshore to Mid Lake- Lake Michigan from St. Joseph to South Haven MI 5 NM offshore to Mid Lake- 333 AM CDT Thu Apr 16 2026 SHEBOYGAN WI TO PENTWATER MI SOUTH... ...DENSE FOG ADVISORY IN EFFECT UNTIL 7 AM CDT FRIDAY... .TODAY...West winds 10 to 20 kt veering to north 10 to 15 kt. Areas of dense fog. Chance of rain showers and slight chance of thunderstorms this morning, then chance of rain showers this afternoon. Waves 1 to 3 ft. .TONIGHT...North winds 10 to 15 kt veering to south. Areas of fog in the evening, then areas of dense fog overnight. Waves 1 to 3 ft. .FRIDAY...Southeast winds 10 to 15 kt increasing to 15 to 25 kt. Areas of dense fog in the morning. Waves 1 to 2 ft building to 4 to 6 ft occasionally to 8 ft. .FRIDAY NIGHT...South winds to 30 kt becoming southwest 15 to 25 kt. Rain showers with a chance of thunderstorms. Waves 5 to 8 ft occasionally to 10 ft. .SATURDAY...West winds 15 to 25 kt. Rain showers in the morning, then chance of rain showers in the afternoon. Waves 5 to 8 ft occasionally to 10 ft. .SATURDAY NIGHT...West winds 15 to 25 kt. Waves 4 to 7 ft occasionally to 9 ft. .SUNDAY...Northwest winds 15 to 25 kt. Waves 4 to 7 ft occasionally to 9 ft. .MONDAY...East winds 10 to 20 kt becoming southeast. Waves 3 to 5 ft. $$ LMZ761-161515- MAFOR 1610/ MICHIGAN NORTH 11804 12814 11714 11610 11400 12404. A chance of rain showers this morning. Waves 2 feet or less. MICHIGAN SOUTH 11524 11624 11724 11714 12810 11504 11404. A chance of rain showers today. Waves 1 to 3 feet today. Waves 2 feet or less tonight. $$ Quigley Experimental modernized open lake forecast is available online at weather.gov/mkx/glftable Graphical marine forecasts are available online at: weather.gov/greatlakes