FZUS63 KMKX 041618 GLFLM OPEN LAKE FORECAST for Lake Michigan National Weather Service Milwaukee/Sullivan WI 1118 AM CDT Sat May 4 2024 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... Areas of low clouds and some fog continue to work their way over the open waters from Lower Michigan late this morning. Visibilities have become more widespread and seeing visibility below 1 nautical mile, especially for western portions of Lake Michigan. Have elected to issue a marine dense fog advisory through this afternoon. A weak, 29.9 inch low pressure center will approach from the west today, dragging a cold front across the open waters in the process. Scattered showers and thunderstorms will be possible along the front. Most activity is expected to remain sub- severe, though an isolated strong storm with small hail and gusty winds can't be ruled out. A 30.1 inch high pressure will approach from the northern Great Plains on Sunday, resulting in light & variable surface winds. Winds will begin to shift out of the east- southeast Monday afternoon & evening as a 29.1 inch low pressure center develops over the northern Great Plains. Winds will pivot between southeasterly and southwesterly through mid- week, prior to turning out of the north and northwest on Thursday & Friday as a 29.6 inch low pressure center moves east of the open waters. Periods of showers and thunderstorms are forecast from early to mid week, with conditions drying out by the end of the week & beginning of next weekend. LMZ261-362-042115- 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- 1118 AM CDT Sat May 4 2024 ROCK ISLAND PASSAGE TO CHARLEVOIX MI NORTH... .REST OF TODAY...East winds 10 to 20 kt. Waves 1 to 3 ft. .TONIGHT...Southeast winds 10 to 20 kt backing to northwest. Patchy fog in the evening. Chance of rain showers and slight chance of thunderstorms. Waves 1 to 3 ft. .SUNDAY...Northwest winds 10 to 15 kt becoming southwest. Waves 1 to 3 ft. .SUNDAY NIGHT...Northwest winds 10 to 15 kt veering to east less than 10 kt overnight. Waves 1 to 2 ft. .MONDAY...East winds 5 to 10 kt increasing to 10 to 15 kt in the afternoon. Waves 1 ft or less. .MONDAY NIGHT...East winds 10 to 15 kt becoming southeast. Waves 1 to 2 ft building to 1 to 3 ft. .TUESDAY...East winds 15 to 25 kt. Chance of rain showers. Waves 2 to 4 ft. .WEDNESDAY...Southwest winds 10 to 20 kt. Waves 1 to 3 ft. $$ LMZ364-366-563-565-567-868-042115- Lake Michigan from Charlevoix to Point Betsie MI 5 NM offshore to Mid Lake- Lake Michigan from Point Betsie to Manistee MI 5 NM offshore to Mid Lake- Lake Michigan from Rock Island Passage to Sturgeon Bay WI- Lake Michigan from Sturgeon Bay to Two Rivers WI 5 NM offshore to Mid Lake- Lake Michigan from Two Rivers to Sheboygan WI 5 NM offshore to Mid Lake- Lake Michigan from Pentwater to Manistee MI 5 NM offshore to Mid Lake- 1118 AM CDT Sat May 4 2024 ROCK ISLAND PASSAGE TO CHARLEVOIX MI SOUTH TO SHEBOYGAN WI TO PENTWATER MI... ...DENSE FOG ADVISORY IN EFFECT UNTIL 7 PM CDT THIS EVENING... .REST OF TODAY...South winds 10 to 15 kt increasing to 10 to 20 kt. Patchy fog late this morning. Waves 1 to 2 ft. .TONIGHT...South winds 10 to 15 kt veering to northwest 10 to 20 kt. Patchy fog in the evening. Chance of rain showers and slight chance of thunderstorms. Waves 1 to 3 ft. .SUNDAY...Northwest winds 10 to 20 kt backing to south 10 to 15 kt. Waves 1 to 3 ft. .SUNDAY NIGHT...Southeast winds 10 to 15 kt becoming east. Waves 1 to 2 ft subsiding to nearly calm. .MONDAY...East winds 5 to 10 kt becoming northeast in the afternoon. Waves 1 to 2 ft. .MONDAY NIGHT...East winds 10 to 15 kt becoming southeast 10 to 20 kt. Waves 1 to 3 ft building to 3 to 5 ft. .TUESDAY...Southeast winds 15 to 25 kt. Showers with a chance of thunderstorms. Waves 4 to 6 ft occasionally to 8 ft. .WEDNESDAY...Southwest winds 10 to 20 kt becoming south. Waves 1 to 3 ft. $$ LMZ080-669-671-673-675-777-779-870-872-874-876-878-042115- 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- 1118 AM CDT Sat May 4 2024 SHEBOYGAN WI TO PENTWATER MI SOUTH... ...DENSE FOG ADVISORY IN EFFECT UNTIL 7 PM CDT THIS EVENING... .REST OF TODAY...Southeast winds 10 to 15 kt increasing to 10 to 20 kt. Patchy fog late this morning. Waves 1 to 2 ft. .TONIGHT...South winds 10 to 15 kt veering to northwest 10 to 20 kt. Patchy dense fog in the evening. Chance of rain showers and thunderstorms in the evening, then slight chance of rain showers and thunderstorms overnight. Waves 1 to 3 ft building to 2 to 4 ft. .SUNDAY...Northwest winds 10 to 20 kt becoming north. Waves 3 to 5 ft. .SUNDAY NIGHT...Northeast winds 10 to 20 kt diminishing to 5 to 10 kt overnight. Waves 2 to 4 ft subsiding to 1 to 2 ft. .MONDAY...East winds 10 to 15 kt increasing to 10 to 20 kt. Waves 2 to 4 ft. .MONDAY NIGHT...East winds 10 to 15 kt becoming southeast 10 to 20 kt. Waves 2 to 4 ft building to 3 to 5 ft. .TUESDAY...Southeast winds 15 to 25 kt becoming south. Showers with a chance of thunderstorms. Waves 4 to 6 ft occasionally to 8 ft. .WEDNESDAY...Southwest winds 10 to 20 kt becoming south. Waves 1 to 3 ft. $$ LMZ761-042115- MAFOR 0416/ MICHIGAN NORTH 12320 11420 19424 11510 11620 12720 11710. A chance of showers tonight. Waves 2 feet or less. MICHIGAN SOUTH 11410 11320 11310 11510 11620 12720 11820. A chance of showers and thunderstorms this evening. Waves 2 feet or less this afternoon. Waves 1 to 3 feet tonight. Waves 2 to 4 feet Sunday morning. $$ Wagner Experimental modernized open lake forecast is available online at weather.gov/mkx/glftable Graphical marine forecasts are available online at: weather.gov/greatlakes