####018011659#### FZUS63 KMQT 211946 GLFLS Open Lake Forecast for Lake Superior National Weather Service Marquette MI 346 PM EDT Sun Apr 21 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...30.3 inch high pressure currently over the Southern Plains extends 30.1 inch ridging across Lake Superior before shifting southeast over the Lower Great Lakes tonight. Meanwhile, 29.7 inch troughing currently over Alberta tracks east-southeast across the Canadian Prairies on Monday. By Monday night, a 29.4 inch low pressure is expected to track north of or across Lake Superior before shifting east of the Great Lakes on Tuesday. A 30.4 inch high pressure over northern Ontario quickly shifts south across Lake Superior Tuesday night and Wednesday. Ridging shifts east of the area Thursday ahead of a low pressure that deepens to 29.3 inches over the North-Central Plains on Friday. LSZ162-220400- Lake Superior west of a line from Saxon Harbor WI to Grand Portage MN beyond 5NM- 346 PM EDT Sun Apr 21 2024 /246 PM CDT Sun Apr 21 2024/ .LATE THIS AFTERNOON...Southwest winds 10 to 20 knots. Waves calm to 2 feet. .TONIGHT...Southwest winds 5 to 15 knots. Waves calm to 2 feet. .MONDAY...Southwest winds 10 to 20 knots. A chance of rain showers by mid afternoon. Waves building to 1 to 3 feet. .MONDAY NIGHT...Southwest winds 10 to 20 knots diminishing to 5 to 15 knots after midnight, then becoming west 10 to 20 knots late. Rain showers likely through midnight, then a chance of rain showers and a slight chance of thunderstorms after midnight. Waves subsiding to calm to 2 feet. .TUESDAY...Northeast winds 20 to 30 knots. Rain showers likely through early afternoon. A chance of snow showers. A slight chance of rain showers by mid afternoon. Waves building to 4 to 8 feet occasionally to 10 feet. .TUESDAY NIGHT...Northeast winds 10 to 20 knots veering east after midnight. Waves subsiding to 2 to 4 feet. .WEDNESDAY...East winds 10 to 20 knots. Waves subsiding to calm to 2 feet. .WEDNESDAY NIGHT...East winds 10 to 20 knots diminishing to 5 to 15 knots after midnight. Waves calm to 2 feet. .THURSDAY...East winds 5 to 15 knots increasing to 15 to 25 knots. Waves building to 1 to 3 feet. .FRIDAY...East winds 15 to 25 knots. A chance of rain showers, then rain showers. Waves building to 2 to 4 feet. $$ LSZ263-220400- Lake Superior from Saxon Harbor WI to Upper Entrance to Portage Canal MI 5NM off shore to the US/Canadian border including Isle Royale National Park- 346 PM EDT Sun Apr 21 2024 ...GALE WATCH IN EFFECT FROM TUESDAY MORNING THROUGH TUESDAY AFTERNOON... .LATE THIS AFTERNOON...Southwest winds 5 to 15 knots. Waves calm to 2 feet. .TONIGHT...Southwest winds 5 to 15 knots. Waves calm to 2 feet. .MONDAY...Southwest winds 10 to 20 knots. A slight chance of rain showers by mid afternoon. Waves building to 1 to 3 feet. .MONDAY NIGHT...Southwest winds 10 to 20 knots diminishing to 5 to 15 knots after midnight, then becoming west 15 to 25 knots late. Rain showers likely through midnight, then a chance of rain showers, possibly mixed with snow after midnight. Waves building to 3 to 6 feet occasionally to 8 feet. .TUESDAY...Northeast gales to 35 knots. A chance of snow showers, possibly mixed with rain. Waves building to 8 to 11 feet occasionally to 14 feet, then subsiding to 6 to 9 feet occasionally to 11 feet. .TUESDAY NIGHT...Northeast winds 20 to 30 knots diminishing to 10 to 20 knots after midnight. Waves subsiding to 2 to 4 feet. .WEDNESDAY...East winds 5 to 15 knots. Waves subsiding to calm to 2 feet. .WEDNESDAY NIGHT...Southeast winds 5 to 15 knots veering south after midnight. Waves calm to 2 feet. .THURSDAY...South winds 5 to 15 knots becoming southeast 10 to 20 knots. Waves building to 2 to 4 feet. .FRIDAY...Southeast winds 15 to 25 knots backing east. A chance of rain showers, then rain showers likely. Waves building to 3 to 6 feet occasionally to 8 feet. $$ LSZ264-220400- Lake Superior from Upper Entrance to Portage Canal to Manitou Island MI 5NM off shore to the US/Canadian Border- 346 PM EDT Sun Apr 21 2024 ...GALE WATCH IN EFFECT FROM TUESDAY MORNING THROUGH TUESDAY AFTERNOON... .LATE THIS AFTERNOON...South winds 5 to 15 knots. Waves 1 to 3 feet subsiding to calm to 2 feet. .TONIGHT...South winds 5 to 15 knots. Waves calm to 2 feet. .MONDAY...Southwest winds 10 to 20 knots diminishing to 5 to 15 knots late. A slight chance of rain showers by mid afternoon. Waves building to 1 to 3 feet, then subsiding to calm to 2 feet. .MONDAY NIGHT...Southwest winds 5 to 15 knots becoming west 15 to 25 knots late. Rain showers. A slight chance of snow showers after midnight. Waves building to 3 to 6 feet occasionally to 8 feet. .TUESDAY...North gales to 35 knots. A chance of rain showers through early afternoon. A chance of snow showers. Waves building to 9 to 12 feet occasionally to 15 feet, then subsiding to 6 to 9 feet occasionally to 11 feet. .TUESDAY NIGHT...Northeast winds 15 to 25 knots diminishing to 10 to 20 knots after midnight. Waves subsiding to 2 to 4 feet. .WEDNESDAY...Northeast winds 5 to 15 knots veering south by mid afternoon. Waves subsiding to calm to 2 feet. .WEDNESDAY NIGHT...South winds 5 to 15 knots. Waves calm to 2 feet. .THURSDAY...South winds 5 to 15 knots increasing to 10 to 20 knots. Waves building to 2 to 4 feet. .FRIDAY...Southeast winds 15 to 25 knots. A chance of rain showers, then rain showers likely. Waves building to 4 to 7 feet occasionally to 9 feet. $$ LSZ265-220400- Lake Superior West of Line from Manitou Island to Marquette MI Beyond 5NM from shore- 346 PM EDT Sun Apr 21 2024 .LATE THIS AFTERNOON...North winds 5 to 15 knots. Waves calm to 2 feet. .TONIGHT...Southeast winds 5 to 15 knots veering south after midnight. Waves calm to 2 feet. .MONDAY...Southwest winds 10 to 20 knots diminishing to 5 to 15 knots in the afternoon, then backing south late. Waves calm to 2 feet. .MONDAY NIGHT...Southwest winds 10 to 20 knots veering west late. Rain showers. Waves calm to 2 feet. .TUESDAY...North winds 20 to 30 knots. Rain and snow showers likely through early afternoon, then a chance of snow showers by mid afternoon. Waves building to 6 to 10 feet occasionally to 13 feet. .TUESDAY NIGHT...North winds 20 to 30 knots becoming northeast 10 to 20 knots after midnight. Waves subsiding to 3 to 6 feet occasionally to 8 feet. .WEDNESDAY...Northeast winds 10 to 20 knots veering east by mid afternoon. Waves subsiding to calm to 2 feet. .WEDNESDAY NIGHT...Southeast winds 10 to 20 knots veering south after midnight. Waves calm to 2 feet. .THURSDAY...South winds 10 to 20 knots becoming southeast 15 to 25 knots. Waves building to 1 to 3 feet. .FRIDAY...Southeast winds 15 to 25 knots increasing to 20 to 30 knots. A chance of rain showers, then rain showers likely. Waves building to 3 to 5 feet occasionally to 7 feet. $$ LSZ266-220400- 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- 346 PM EDT Sun Apr 21 2024 ...GALE WATCH IN EFFECT FROM TUESDAY MORNING THROUGH TUESDAY AFTERNOON... .LATE THIS AFTERNOON...Northwest winds 10 to 20 knots. Waves 3 to 5 feet occasionally to 7 feet. .TONIGHT...Southeast winds 5 to 15 knots veering south after midnight, then increasing to 10 to 20 knots late. Waves subsiding to calm to 2 feet. .MONDAY...South winds 10 to 20 knots. Waves building to 1 to 3 feet. .MONDAY NIGHT...South winds 15 to 25 knots diminishing to 10 to 20 knots after midnight, then becoming southwest 15 to 25 knots late. Rain showers. Waves building to 3 to 5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet. .TUESDAY...North gales to 35 knots. Rain and snow showers likely through early afternoon, then a chance of snow showers by mid afternoon. Waves building to 9 to 12 feet occasionally to 15 feet, then subsiding to 7 to 10 feet occasionally to 13 feet. .TUESDAY NIGHT...North winds 20 to 30 knots becoming northeast 15 to 25 knots after midnight. Waves subsiding to 4 to 7 feet occasionally to 9 feet. .WEDNESDAY...Northeast winds 10 to 20 knots becoming north 5 to 15 knots by mid afternoon. Waves subsiding to calm to 2 feet. .WEDNESDAY NIGHT...South winds 5 to 15 knots increasing to 10 to 20 knots after midnight. Waves calm to 2 feet. .THURSDAY...South winds 10 to 20 knots. Waves building to 2 to 4 feet. .FRIDAY...Southeast winds 15 to 25 knots increasing to 20 to 30 knots. A chance of rain showers, then rain showers likely. Waves building to 4 to 7 feet occasionally to 9 feet. $$ LSZ267-220400- Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off shore to the US/Canadian border- 346 PM EDT Sun Apr 21 2024 .LATE THIS AFTERNOON...Northwest winds 15 to 25 knots. Waves 3 to 6 feet occasionally to 8 feet. .TONIGHT...Northwest winds 10 to 20 knots becoming south 5 to 15 knots after midnight, then increasing to 10 to 20 knots late. Waves subsiding to calm to 2 feet. .MONDAY...South winds 15 to 25 knots becoming southwest 10 to 20 knots in the afternoon, then backing south late. Waves building to 1 to 3 feet, then subsiding to calm to 2 feet. .MONDAY NIGHT...South winds 20 to 30 knots diminishing to 10 to 20 knots. A chance of rain showers through midnight, then rain showers likely after midnight. Waves building to 3 to 5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet. .TUESDAY...West winds 20 to 30 knots veering north by mid afternoon. Rain showers, possibly mixed with snow through early afternoon, then a chance of snow showers, possibly mixed with rain by mid afternoon. Waves building to 7 to 10 feet occasionally to 13 feet. .TUESDAY NIGHT...North winds 20 to 30 knots becoming northeast 15 to 25 knots after midnight. Waves building to 8 to 11 feet occasionally to 14 feet, then subsiding to 4 to 7 feet occasionally to 9 feet. .WEDNESDAY...North winds 10 to 20 knots backing northwest by mid afternoon. Waves subsiding to calm to 2 feet. .WEDNESDAY NIGHT...Northwest winds 5 to 15 knots becoming south 10 to 20 knots after midnight. Waves calm to 2 feet. .THURSDAY...South winds 10 to 20 knots. Waves building to 1 to 3 feet. .FRIDAY...Southeast winds 15 to 25 knots increasing to 20 to 30 knots. Rain showers likely. Waves building to 3 to 6 feet occasionally to 8 feet. $$ LSZ261-220400- MAFOR 2121/ Superior West 12510 11500 12510 12520 11410. Waves 1 to 2 feet. Superior North Central 11510 11400 13410 13520. Waves 1 to 3 feet. Superior South Central 11100 12300 11400 11410 12510 11410. Waves 1 to 3 feet tonight. Waves 2 feet or less Monday. Superior East 11730 11720 11610 11410 12420 11520 11510. Waves 3 to 6 feet subsiding to 1 to 3 feet tonight. Waves 2 to 3 feet Monday. $$ EK Experimental modernized open lake forecast is available online at weather.gov/mqt/glftable Graphical marine forecasts are available online at: weather.gov/greatlakes