####018011433#### FZUS63 KMQT 220743 GLFLS Open Lake Forecast for Lake Superior National Weather Service Marquette MI 343 AM EDT Mon Apr 22 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...29.5 inch low pressure over southern Saskatchewan will move east and be north of Thunder Bay Ontario by this evening while deepening to 29.4 inches. This low develops into a trough of 29.5 inches over eastern Lake Superior Tuesday morning while 30.3 inch high pressure moves into northern Manitoba and into northern Ontario by Tuesday evening. This high strengthens to 30.4 inches and 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 29.2 inches over the North-Central Plains on Friday. LSZ162-221545- Lake Superior west of a line from Saxon Harbor WI to Grand Portage MN beyond 5NM- 343 AM EDT Mon Apr 22 2024 /243 AM CDT Mon Apr 22 2024/ .EARLY THIS MORNING...Southwest winds 10 to 20 knots. Waves calm to 2 feet building to 1 to 3 feet. .TODAY...Southwest winds 10 to 20 knots backing south late. Waves 1 to 3 feet. .TONIGHT...Southwest winds 10 to 20 knots veering west late. A chance of rain showers and a slight chance of thunderstorms through midnight. Waves subsiding to calm to 2 feet. .TUESDAY...Northeast winds 20 to 30 knots diminishing to 15 to 25 knots late. A slight chance of rain showers through early afternoon. A chance of snow showers. Waves building to 5 to 8 feet occasionally to 10 feet. .TUESDAY NIGHT...Northeast winds 10 to 20 knots. Waves subsiding to 2 to 4 feet. .WEDNESDAY...East winds 10 to 20 knots. Waves subsiding to 1 to 3 feet, then building to 2 to 4 feet. .WEDNESDAY NIGHT...East winds 5 to 15 knots. Waves subsiding to calm to 2 feet. .THURSDAY...East winds 10 to 20 knots becoming southeast 15 to 25 knots. Waves building to 2 to 4 feet. .FRIDAY...East winds 15 to 25 knots increasing to 20 to 30 knots. A chance of rain showers, then rain showers. Waves subsiding to 1 to 3 feet, then building to 2 to 4 feet. $$ LSZ263-221545- Lake Superior from Saxon Harbor WI to Upper Entrance to Portage Canal MI 5NM off shore to the US/Canadian border including Isle Royale National Park- 343 AM EDT Mon Apr 22 2024 ...GALE WARNING IN EFFECT FROM TUESDAY MORNING THROUGH TUESDAY AFTERNOON... .EARLY THIS MORNING...Southwest winds 10 to 20 knots. Waves calm to 2 feet building to 1 to 3 feet. .TODAY...Southwest winds 15 to 25 knots diminishing to 10 to 20 knots late. Waves building to 2 to 4 feet, then subsiding to 1 to 3 feet. .TONIGHT...Southwest winds 10 to 20 knots veering west late. A chance of rain showers and a slight chance of thunderstorms. Waves 1 to 3 feet. .TUESDAY...North gales to 35 knots veering northeast in the afternoon, then diminishing to 20 to 30 knots late. A chance of rain showers through early afternoon. A chance of snow showers. Waves building to 7 to 10 feet occasionally to 13 feet, then subsiding to 5 to 8 feet occasionally to 10 feet. .TUESDAY NIGHT...Northeast winds 15 to 25 knots diminishing to 10 to 20 knots after midnight. Waves subsiding to 3 to 5 feet occasionally to 7 feet. .WEDNESDAY...East winds 5 to 15 knots increasing to 10 to 20 knots by mid afternoon. Waves subsiding to calm to 2 feet. .WEDNESDAY NIGHT...Southeast winds 5 to 15 knots veering south after midnight. Waves calm to 2 feet. .THURSDAY...South winds 5 to 15 knots increasing to 10 to 20 knots. Waves building to 2 to 4 feet. .FRIDAY...Southeast winds 15 to 25 knots. Rain showers. Waves building to 3 to 6 feet occasionally to 8 feet. $$ LSZ264-221545- Lake Superior from Upper Entrance to Portage Canal to Manitou Island MI 5NM off shore to the US/Canadian Border- 343 AM EDT Mon Apr 22 2024 ...GALE WARNING IN EFFECT FROM TUESDAY MORNING THROUGH TUESDAY AFTERNOON... .EARLY THIS MORNING...Southwest winds 10 to 20 knots. Waves calm to 2 feet building to 1 to 3 feet. .TODAY...Southwest winds 15 to 25 knots diminishing to 10 to 20 knots in the afternoon. Waves building to 2 to 4 feet, then subsiding to 1 to 3 feet. .TONIGHT...Southwest winds 10 to 20 knots veering west late. Rain showers likely through midnight. A slight chance of thunderstorms. A chance of rain showers after midnight. Waves 1 to 3 feet. .TUESDAY...North gales to 35 knots veering northeast in the afternoon, then diminishing to 20 to 30 knots late. A chance of rain showers through early afternoon. A chance of snow showers. 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 15 to 25 knots after midnight. Waves subsiding to 3 to 5 feet occasionally to 7 feet. .WEDNESDAY...East 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 10 to 20 knots increasing to 15 to 25 knots. Waves building to 3 to 6 feet occasionally to 8 feet. .FRIDAY...Southeast winds 20 to 30 knots. A chance of rain showers. Waves building to 4 to 7 feet occasionally to 9 feet. $$ LSZ265-221545- Lake Superior West of Line from Manitou Island to Marquette MI Beyond 5NM from shore- 343 AM EDT Mon Apr 22 2024 ...GALE WARNING IN EFFECT FROM TUESDAY MORNING THROUGH TUESDAY AFTERNOON... .EARLY THIS MORNING...Southwest winds 10 to 20 knots. Waves calm to 2 feet. .TODAY...Southwest winds 10 to 20 knots. Waves building to 1 to 3 feet, then subsiding to calm to 2 feet. .TONIGHT...South winds 10 to 20 knots veering west late. Rain showers likely through midnight. A slight chance of thunderstorms. A chance of rain showers after midnight. Waves building to 1 to 3 feet, then subsiding to calm to 2 feet. .TUESDAY...West winds 15 to 25 knots becoming north gales to 35 knots in the afternoon. A slight chance of rain showers through early afternoon. A chance of snow showers. Waves building to 7 to 10 feet occasionally to 13 feet. .TUESDAY NIGHT...Northeast winds 20 to 30 knots diminishing to 15 to 25 knots after midnight. Waves subsiding to 3 to 6 feet occasionally to 8 feet. .WEDNESDAY...Northeast winds 10 to 20 knots veering east by mid afternoon. Waves subsiding to calm to 2 feet. .WEDNESDAY NIGHT...Southeast winds 10 to 20 knots veering south after midnight. Waves calm to 2 feet. .THURSDAY...Southeast winds 10 to 20 knots becoming south 20 to 30 knots. Waves building to 2 to 4 feet. .FRIDAY...Southeast winds 20 to 30 knots. Rain showers. Waves building to 3 to 5 feet occasionally to 7 feet. $$ LSZ266-221545- 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- 343 AM EDT Mon Apr 22 2024 ...GALE WARNING IN EFFECT FROM TUESDAY MORNING THROUGH TUESDAY AFTERNOON... .EARLY THIS MORNING...Southwest winds 15 to 25 knots. Waves 1 to 3 feet building to 2 to 4 feet. .TODAY...Southwest winds 15 to 25 knots diminishing to 10 to 20 knots in the afternoon, then backing south late. Waves building to 3 to 5 feet occasionally to 7 feet, then subsiding to 1 to 3 feet. .TONIGHT...South winds 15 to 25 knots becoming southwest 10 to 20 knots late. 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, then subsiding to 1 to 3 feet. .TUESDAY...West gales to 35 knots veering north in the afternoon. A chance of snow showers, possibly mixed with rain. Waves building to 7 to 11 feet occasionally to 14 feet. .TUESDAY NIGHT...Northeast winds 20 to 30 knots. Waves subsiding to 3 to 6 feet occasionally to 8 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...Southeast 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 increasing to 15 to 25 knots. Waves building to 3 to 6 feet occasionally to 8 feet. .FRIDAY...Southeast winds 20 to 30 knots increasing to gales to 35 knots. A chance of rain showers. Waves building to 4 to 7 feet occasionally to 9 feet. $$ LSZ267-221545- Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off shore to the US/Canadian border- 343 AM EDT Mon Apr 22 2024 ...GALE WARNING IN EFFECT FROM TUESDAY AFTERNOON THROUGH LATE TUESDAY NIGHT... .EARLY THIS MORNING...South winds 10 to 20 knots. Waves calm to 2 feet building to 1 to 3 feet. .TODAY...Southwest winds 15 to 25 knots diminishing to 10 to 20 knots in the afternoon, then becoming south 15 to 25 knots late. Waves building to 2 to 4 feet, then subsiding to 1 to 3 feet. .TONIGHT...South winds 20 to 30 knots diminishing to 15 to 25 knots late. A chance of rain showers through midnight. A slight chance of thunderstorms. Rain showers likely after midnight. Waves building to 3 to 5 feet occasionally to 7 feet, then subsiding to 1 to 3 feet. .TUESDAY...Southwest winds 10 to 20 knots becoming north 20 to 30 knots in the afternoon, then becoming northeast gales to 35 knots late. A slight chance of rain showers. A slight chance of snow showers by mid afternoon. Waves subsiding to calm to 2 feet, then building to 6 to 9 feet occasionally to 11 feet. .TUESDAY NIGHT...Northeast gales to 35 knots diminishing to 20 to 30 knots after midnight. Waves building to 7 to 10 feet occasionally to 13 feet, then subsiding to 3 to 6 feet occasionally to 8 feet. .WEDNESDAY...Northeast winds 15 to 25 knots becoming north 5 to 15 knots by mid afternoon. Waves subsiding to calm to 2 feet. .WEDNESDAY NIGHT...Northwest winds 5 to 15 knots becoming south 10 to 20 knots after midnight. Waves calm to 2 feet. .THURSDAY...Southeast winds 10 to 20 knots becoming south 15 to 25 knots. Waves building to 2 to 4 feet. .FRIDAY...Southeast winds 20 to 30 knots increasing to gales to 35 knots. Rain showers likely. Waves building to 3 to 6 feet occasionally to 8 feet. $$ LSZ261-221545- MAFOR 2209/ Superior West 13520 12420 12520 11510. A chance of rain showers tonight. Waves 1 to 3 feet. Superior North Central 14530 12420 11526 11520. Waves 2 to 4 feet today. Waves 1 to 3 feet tonight. Superior South Central 14510 11410 11420 11426 11520. Waves 1 to 3 feet. Superior East 11420 11530 12520 11420 12430 11436. Waves 2 to 4 feet building to 3 to 5 feet, then subsiding to 2 to 3 feet today. Waves 2 to 4 feet building to 3 to 5 feet tonight. $$ 07 Experimental modernized open lake forecast is available online at weather.gov/mqt/glftable Graphical marine forecasts are available online at: weather.gov/greatlakes