####018009599#### FZUS63 KMQT 041401 GLFLS Open Lake Forecast for Lake Superior National Weather Service Marquette MI 1001 AM EDT Sat May 4 2024 For waters beyond 5 nautical miles of shore on Lake Superior. 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...Weak ridging of 30.0 inches holds across eastern Lake Superior this morning before a weak 29.9 inch trough moves into the Upper Great Lakes this evening. Ridging at 30.1 inches returns across the lake on Sunday. Ridging shifts east early next week as a broad 29.2 inch low pressure develops on the Northern Plains on Monday. A strong pressure gradient over western Lake Superior begins to setup Tuesday morning as a deepening 29.0 inch low pushes eastward against 30.0 inch ridging over far northern Ontario. A secondary 29.4 inch low pressure moves into southern Lake Superior Wednesday morning. LSZ162-042200- Lake Superior west of a line from Saxon Harbor WI to Grand Portage MN beyond 5NM- 1001 AM EDT Sat May 4 2024 /901 AM CDT Sat May 4 2024/ .REST OF TODAY...Northwest winds 5 to 15 knots veering north in the afternoon, then backing northwest late. Rain showers likely. Waves calm to 2 feet. .TONIGHT...West winds 5 to 15 knots increasing to 10 to 20 knots late. A slight chance of rain showers through midnight. Waves calm to 2 feet. .SUNDAY...West winds 5 to 15 knots backing southwest in the afternoon. Waves calm to 2 feet. .SUNDAY NIGHT...South winds 5 to 15 knots backing east after midnight. Waves calm to 2 feet. .MONDAY...East winds 10 to 20 knots becoming northeast 15 to 25 knots by mid afternoon. Waves building to 4 to 7 feet occasionally to 9 feet. .MONDAY NIGHT...East winds 15 to 25 knots. A chance of rain showers after midnight. Waves subsiding to 3 to 6 feet occasionally to 8 feet. .TUESDAY...East winds 15 to 25 knots backing northeast. Rain showers. Waves building to 4 to 7 feet occasionally to 9 feet, then subsiding to 1 to 3 feet. .WEDNESDAY...Northeast winds 10 to 20 knots increasing to 15 to 25 knots. A chance of rain showers. Waves building to 2 to 4 feet, then subsiding to 1 to 3 feet. $$ LSZ263-042200- Lake Superior from Saxon Harbor WI to Upper Entrance to Portage Canal MI 5NM off shore to the US/Canadian border including Isle Royale National Park- 1001 AM EDT Sat May 4 2024 .REST OF TODAY...North winds 5 to 15 knots. A chance of rain showers. Waves calm to 2 feet. .TONIGHT...Northwest winds 5 to 15 knots backing west after midnight. A slight chance of rain showers through midnight. Waves calm to 2 feet. .SUNDAY...West winds 5 to 15 knots backing southwest late. Waves building to 1 to 3 feet. .SUNDAY NIGHT...Southwest winds 5 to 15 knots backing south after midnight. Waves subsiding to calm to 2 feet. .MONDAY...East winds 5 to 15 knots increasing to 10 to 20 knots by mid afternoon. Waves building to 2 to 4 feet. .MONDAY NIGHT...East winds 10 to 20 knots. Waves subsiding to 1 to 3 feet, then building to 3 to 5 feet occasionally to 7 feet. .TUESDAY...East winds 15 to 25 knots. Rain showers. Waves building to 3 to 6 feet occasionally to 8 feet, then subsiding to 2 to 4 feet. .WEDNESDAY...Northeast winds 10 to 20 knots. A chance of rain showers. Waves subsiding to 1 to 3 feet, then building to 2 to 4 feet. $$ LSZ264-042200- Lake Superior from Upper Entrance to Portage Canal to Manitou Island MI 5NM off shore to the US/Canadian Border- 1001 AM EDT Sat May 4 2024 .REST OF TODAY...West winds less than 10 knots becoming northeast 5 to 15 knots in the afternoon, then backing north late. A chance of rain showers. Waves calm to 2 feet. .TONIGHT...Northwest winds 5 to 15 knots increasing to 10 to 20 knots after midnight, then diminishing to 5 to 15 knots late. A chance of rain showers through midnight. Waves building to 2 to 4 feet, then subsiding to 1 to 3 feet. .SUNDAY...West winds 5 to 15 knots backing southwest late. Waves 1 to 3 feet. .SUNDAY NIGHT...Southwest winds 5 to 15 knots. Waves subsiding to calm to 2 feet. .MONDAY...South winds 5 to 15 knots becoming east 10 to 20 knots by mid afternoon. Waves calm to 2 feet. .MONDAY NIGHT...East winds 10 to 20 knots veering southeast after midnight. Waves building to 3 to 5 feet occasionally to 7 feet. .TUESDAY...East winds 15 to 25 knots. A chance of rain showers, then rain showers likely. Waves building to 3 to 6 feet occasionally to 8 feet, then subsiding to 2 to 4 feet. .WEDNESDAY...Northeast winds 10 to 20 knots. A chance of rain showers. Waves subsiding to 1 to 3 feet, then building to 2 to 4 feet. $$ LSZ265-042200- Lake Superior West of Line from Manitou Island to Marquette MI Beyond 5NM from shore- 1001 AM EDT Sat May 4 2024 .REST OF TODAY...Southeast winds 5 to 15 knots becoming east 10 to 20 knots in the afternoon, then backing north late. A chance of rain showers by mid afternoon. Waves calm to 2 feet. .TONIGHT...Northwest winds 10 to 20 knots becoming west 15 to 25 knots after midnight, then diminishing to 10 to 20 knots late. A chance of rain showers through midnight. Waves building to 2 to 4 feet, then subsiding to 1 to 3 feet. .SUNDAY...West winds 10 to 20 knots diminishing to 5 to 15 knots late. Waves subsiding to calm to 2 feet. .SUNDAY NIGHT...Southwest winds 5 to 15 knots. Waves calm to 2 feet. .MONDAY...Southeast winds 5 to 15 knots becoming east 10 to 20 knots by mid afternoon. Waves calm to 2 feet. .MONDAY NIGHT...Southeast winds 10 to 20 knots. Waves building to 1 to 3 feet. .TUESDAY...East winds 15 to 25 knots. Showers. Waves building to 3 to 5 feet occasionally to 7 feet, then subsiding to 1 to 3 feet. .WEDNESDAY...Northeast winds 10 to 20 knots increasing to 15 to 25 knots. A chance of rain showers. Waves 1 to 3 feet. $$ LSZ266-042200- Lake Superior East of a line from Manitou Island to Marquette MI and West of a line from Grand Marais MI to the US/Canadian Border Beyond 5NM from shore- 1001 AM EDT Sat May 4 2024 .REST OF TODAY...Southeast winds 10 to 20 knots. A chance of rain showers by mid afternoon. Waves calm to 2 feet building to 1 to 3 feet. .TONIGHT...Northwest winds 10 to 20 knots increasing to 15 to 25 knots after midnight. A chance of rain showers. Waves building to 3 to 5 feet occasionally to 7 feet. .SUNDAY...Northwest winds 10 to 20 knots backing west in the afternoon, then diminishing to 5 to 15 knots late. Waves subsiding to 1 to 3 feet. .SUNDAY NIGHT...West winds 5 to 15 knots backing southwest after midnight. Waves subsiding to calm to 2 feet. .MONDAY...South winds 5 to 15 knots backing east by mid afternoon. Waves calm to 2 feet. .MONDAY NIGHT...East winds 10 to 20 knots veering southeast after midnight. Waves building to 1 to 3 feet. .TUESDAY...East winds 15 to 25 knots. Rain showers likely. Waves building to 3 to 6 feet occasionally to 8 feet, then subsiding to 2 to 4 feet. .WEDNESDAY...Northeast winds 15 to 25 knots. A chance of rain showers. Waves subsiding to 1 to 3 feet. $$ LSZ267-042200- Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off shore to the US/Canadian border- 1001 AM EDT Sat May 4 2024 .REST OF TODAY...Southeast winds 10 to 20 knots. A chance of rain showers by mid afternoon. Waves calm to 2 feet building to 1 to 3 feet. .TONIGHT...Southeast winds 10 to 20 knots becoming west 15 to 25 knots after midnight. Rain showers likely through midnight. A slight chance of thunderstorms. A chance of rain showers after midnight. Waves building to 3 to 5 feet occasionally to 7 feet. .SUNDAY...West winds 15 to 25 knots diminishing to 10 to 20 knots in the afternoon. Waves subsiding to 1 to 3 feet. .SUNDAY NIGHT...West winds 10 to 20 knots becoming southwest 5 to 15 knots after midnight. Waves subsiding to calm to 2 feet. .MONDAY...South winds 5 to 15 knots becoming east 10 to 20 knots by mid afternoon. Waves calm to 2 feet. .MONDAY NIGHT...East winds 10 to 20 knots veering southeast after midnight. Waves building to 1 to 3 feet. .TUESDAY...Southeast winds 15 to 25 knots backing east. Rain showers likely. Waves building to 2 to 4 feet, then subsiding to 1 to 3 feet. .WEDNESDAY...East winds 15 to 25 knots diminishing to 10 to 20 knots. A chance of showers. Waves subsiding to calm to 2 feet. $$ LSZ261-042200- MAFOR 0415/ Superior West 12816 11700 11600 14610. Waves 1 to 2 feet. Superior North Central 12100 11800 11810 12720 12710. A chance of showers this afternoon. A chance of rain showers this evening. Waves 1 to 3 feet. Superior South Central 11310 11210 11110 12720 11730 12620. A chance of showers this afternoon. A chance of rain showers this evening. Waves 1 foot or less this afternoon. Waves 1 to 3 feet building to 2 to 4 feet tonight. Waves 2 to 4 feet Sunday morning. Superior East 11310 12320 11326 11626 11630 11730 11720. Waves 1 to 3 feet this afternoon. Waves 2 to 3 feet building to 3 to 5 feet tonight. Waves 3 to 5 feet Sunday morning. $$ Voss Experimental modernized open lake forecast is available online at weather.gov/mqt/glftable Graphical marine forecasts are available online at: weather.gov/greatlakes ####018006288#### FZUS63 KMKX 041401 GLFLM OPEN LAKE FORECAST for Lake Michigan National Weather Service Milwaukee/Sullivan WI 901 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 patchy fog continue to work their way over the open waters from Lower Michigan this morning. While not expected to be widespread, visibilities could briefly drop to and below a mile in spots over the southern and middle portions of the lake for the remainder of the morning. Dense fog advisories are not planned at this time as webcams and increasing wind trends favor lower clouds rather than widespread fog. 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. LMZ261-362-364-366-563-565-567-868-042130- 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- 901 AM CDT Sat May 4 2024 SHEBOYGAN WI TO PENTWATER MI NORTH... .REST OF TODAY...Southeast winds 10 to 20 kt. Waves 1 ft or less building to 1 to 3 ft. .TONIGHT...South winds 10 to 20 kt veering to northwest. Chance of rain showers and slight chance of thunderstorms. Waves 1 to 3 ft. .SUNDAY...Northwest winds 10 to 20 kt backing to south. Waves 1 to 3 ft. .SUNDAY NIGHT...Southeast winds 10 to 15 kt becoming east. Waves 1 to 2 ft. .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. Rain 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. $$ LMZ080-669-671-673-675-777-779-870-872-874-876-878-042130- 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- 901 AM CDT Sat May 4 2024 SHEBOYGAN WI TO PENTWATER MI SOUTH... .REST OF TODAY...East winds 10 to 20 kt becoming southeast. Waves 1 to 2 ft. .TONIGHT...South winds 10 to 15 kt veering to west 10 to 20 kt late in the evening, then becoming northwest after midnight increasing to 15 to 25 kt late. 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 15 to 25 kt becoming north 10 to 20 kt. 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. $$ LMZ761-042130- MAFOR 0416/ MICHIGAN NORTH 12320 11420 11526 11620 12720 11710. Waves 2 feet or less. MICHIGAN SOUTH 11310 12320 11510 11720 12730 11820. A chance of showers and thunderstorms this evening. Waves 2 feet or less this afternoon. Waves 1 to 3 feet tonight. Waves 2 to 4 feet Sunday morning. $$ Wagner Experimental modernized open lake forecast is available online at weather.gov/mkx/glftable Graphical marine forecasts are available online at: weather.gov/greatlakes