####018012963#### FZUS63 KMQT 172008 GLFLS Open Lake Forecast for Lake Superior National Weather Service Marquette MI 408 PM EDT Wed Apr 17 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... A 29.6 inch low pressure is currently placed over Upper Michigan this afternoon. This low will weaken to 29.8 inches as it lifts east across northern Lake Michigan tonight before phasing with another 29.8 inch low pressure over northern Ontario. This low moves into eastern James Bay Friday night into Saturday, deepening to 29.3 inches. Meanwhile, a 30.4 inch high pressure ridge builds southeast into the Northern Plains extending weak 30.0 inch ridging across western Lake Superior. Ridging over the lake builds to 30.1 inches on Saturday and weakens to 30.0 inches Sunday. Troughing near 29.8 inches begins to develop over the Northern Plains and pushes into western Lake Superior on Monday. LSZ162-180415- Lake Superior west of a line from Saxon Harbor WI to Grand Portage MN beyond 5NM- 408 PM EDT Wed Apr 17 2024 /308 PM CDT Wed Apr 17 2024/ ...GALE WARNING IN EFFECT UNTIL 5 PM EDT /4 PM CDT/ THIS AFTERNOON... .LATE THIS AFTERNOON...North winds 15 to 25 knots with a few gale force gusts to 35 knots possible. Numerous rain showers. Waves 5 to 8 feet occasionally to 10 feet subsiding to 3 to 6 feet occasionally to 8 feet. .TONIGHT...West winds 10 to 20 knots. A chance of rain showers through midnight. Waves subsiding to 1 to 3 feet. .THURSDAY...Southwest winds 10 to 20 knots increasing to 15 to 25 knots in the afternoon. Waves building to 3 to 6 feet occasionally to 8 feet. .THURSDAY NIGHT...West winds 15 to 25 knots. Waves subsiding to 2 to 4 feet, then building to 3 to 5 feet occasionally to 7 feet. .FRIDAY...West winds 20 to 30 knots increasing to gales to 35 knots by mid afternoon. A slight chance of snow showers through early afternoon. A chance of rain showers. Waves building to 4 to 8 feet occasionally to 10 feet. .FRIDAY NIGHT...West winds 20 to 30 knots. Waves subsiding to 3 to 5 feet occasionally to 7 feet. .SATURDAY...Northwest winds 15 to 25 knots backing west by mid afternoon. Waves subsiding to 1 to 3 feet. .SATURDAY NIGHT...West winds 10 to 20 knots. Waves subsiding to calm to 2 feet, then building to 1 to 3 feet. .SUNDAY...Southwest winds 15 to 25 knots becoming west 10 to 20 knots. Waves building to 2 to 4 feet, then subsiding to calm to 2 feet. .MONDAY...Southwest winds 10 to 20 knots backing east. A chance of rain showers. Waves building to 1 to 3 feet. $$ LSZ263-180415- Lake Superior from Saxon Harbor WI to Upper Entrance to Portage Canal MI 5NM off shore to the US/Canadian border including Isle Royale National Park- 408 PM EDT Wed Apr 17 2024 ...GALE WARNING IN EFFECT UNTIL 5 PM EDT THIS AFTERNOON... .LATE THIS AFTERNOON...Northeast winds 20 to 30 knots with a few gale force gusts to 35 knots possible. Numerous rain showers. Waves 8 to 11 feet occasionally to 14 feet subsiding to 7 to 10 feet occasionally to 13 feet. .TONIGHT...North winds 10 to 20 knots backing west after midnight. A chance of rain showers. Waves subsiding to 2 to 4 feet. .THURSDAY...West winds 5 to 15 knots becoming southwest 10 to 20 knots in the afternoon, then veering west late. Waves subsiding to 1 to 3 feet, then building to 3 to 5 feet occasionally to 7 feet. .THURSDAY NIGHT...West winds 10 to 20 knots increasing to 15 to 25 knots late. Waves building to 3 to 6 feet occasionally to 8 feet. .FRIDAY...West gales to 35 knots. A chance of rain showers, possibly mixed with snow. Waves building to 7 to 11 feet occasionally to 14 feet. .FRIDAY NIGHT...West winds 20 to 30 knots diminishing to 15 to 25 knots after midnight. Waves subsiding to 4 to 7 feet occasionally to 9 feet. .SATURDAY...Northwest winds 15 to 25 knots becoming west 10 to 20 knots by mid afternoon. Waves subsiding to 3 to 5 feet occasionally to 7 feet. .SATURDAY NIGHT...West winds 10 to 20 knots. Waves subsiding to 2 to 4 feet. .SUNDAY...West winds 15 to 25 knots becoming southwest 10 to 20 knots. Waves building to 3 to 5 feet occasionally to 7 feet, then subsiding to 1 to 3 feet. .MONDAY...Southwest winds 5 to 15 knots backing east. A chance of rain showers. Waves subsiding to calm to 2 feet, then building to 1 to 3 feet. $$ LSZ264-180415- Lake Superior from Upper Entrance to Portage Canal to Manitou Island MI 5NM off shore to the US/Canadian Border- 408 PM EDT Wed Apr 17 2024 ...GALE WARNING IN EFFECT UNTIL 8 PM EDT THIS EVENING... .LATE THIS AFTERNOON...East winds 20 to 30 knots with a few gale force gusts to 35 knots possible. Rain showers. Waves 8 to 11 feet occasionally to 14 feet subsiding to 7 to 10 feet occasionally to 13 feet. .TONIGHT...East winds 15 to 25 knots becoming northwest 10 to 20 knots after midnight, then backing west late. A chance of rain showers. Waves subsiding to 2 to 4 feet. .THURSDAY...West winds 5 to 15 knots backing southwest in the afternoon, then increasing to 10 to 20 knots late. Waves subsiding to 1 to 3 feet, then building to 2 to 4 feet. .THURSDAY NIGHT...West winds 10 to 20 knots increasing to 15 to 25 knots late. Waves building to 3 to 6 feet occasionally to 8 feet. .FRIDAY...West gales to 35 knots. A slight chance of rain showers. Waves building to 8 to 11 feet occasionally to 14 feet. .FRIDAY NIGHT...West winds 20 to 30 knots veering northwest after midnight. Waves subsiding to 5 to 8 feet occasionally to 10 feet. .SATURDAY...Northwest winds 20 to 30 knots becoming west 15 to 25 knots by mid afternoon. Waves subsiding to 3 to 5 feet occasionally to 7 feet. .SATURDAY NIGHT...West winds 10 to 20 knots. Waves building to 3 to 6 feet occasionally to 8 feet, then subsiding to 2 to 4 feet. .SUNDAY...West winds 15 to 25 knots becoming southwest 10 to 20 knots. Waves building to 3 to 5 feet occasionally to 7 feet, then subsiding to 1 to 3 feet. .MONDAY...Southwest winds 5 to 15 knots becoming east 10 to 20 knots. A chance of rain showers. Waves subsiding to calm to 2 feet, then building to 1 to 3 feet. $$ LSZ265-180415- Lake Superior West of Line from Manitou Island to Marquette MI Beyond 5NM from shore- 408 PM EDT Wed Apr 17 2024 ...GALE WARNING IN EFFECT UNTIL 8 PM EDT THIS EVENING... .LATE THIS AFTERNOON...East winds 15 to 25 knots with a few gale force gusts to 35 knots possible. Rain showers. Waves 4 to 8 feet occasionally to 10 feet. .TONIGHT...East winds 5 to 15 knots becoming west 15 to 25 knots after midnight, then increasing to 20 to 30 knots late. Rain showers likely through midnight, then a slight chance of rain showers after midnight. Waves subsiding to 2 to 4 feet. .THURSDAY...West winds 10 to 20 knots. A slight chance of rain showers by mid afternoon. Waves subsiding to calm to 2 feet. .THURSDAY NIGHT...Southwest winds 5 to 15 knots becoming west 10 to 20 knots after midnight, then increasing to 15 to 25 knots late. A slight chance of rain showers through midnight. Waves building to 1 to 3 feet. .FRIDAY...West winds 15 to 25 knots increasing to 20 to 30 knots by mid afternoon. A slight chance of snow showers through early afternoon. A chance of rain showers. Waves building to 3 to 6 feet occasionally to 8 feet. .FRIDAY NIGHT...West winds 20 to 30 knots. Waves subsiding to 3 to 5 feet occasionally to 7 feet. .SATURDAY...Northwest winds 20 to 30 knots becoming west 15 to 25 knots by mid afternoon. Waves subsiding to 2 to 4 feet. .SATURDAY NIGHT...West winds 15 to 25 knots. Waves subsiding to 1 to 3 feet. .SUNDAY...West winds 15 to 25 knots becoming southwest 10 to 20 knots. Waves subsiding to calm to 2 feet. .MONDAY...West winds 10 to 20 knots backing southeast. A chance of rain showers. Waves calm to 2 feet. $$ LSZ266-180415- 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- 408 PM EDT Wed Apr 17 2024 ...GALE WARNING IN EFFECT UNTIL 8 PM EDT THIS EVENING... .LATE THIS AFTERNOON...Southeast gales to 35 knots. Rain showers. Waves 8 to 11 feet occasionally to 14 feet subsiding to 7 to 10 feet occasionally to 13 feet. .TONIGHT...East winds 20 to 30 knots becoming west 15 to 25 knots after midnight. A chance of rain showers. Waves subsiding to 2 to 4 feet, then building to 3 to 5 feet occasionally to 7 feet. .THURSDAY...West winds 10 to 20 knots diminishing to 5 to 15 knots in the afternoon, then backing southwest late. A slight chance of rain showers by mid afternoon. Waves subsiding to 1 to 3 feet. .THURSDAY NIGHT...Southwest winds 5 to 15 knots becoming west 10 to 20 knots after midnight. A chance of rain showers. Waves building to 3 to 5 feet occasionally to 7 feet. .FRIDAY...West winds 20 to 30 knots. A slight chance of snow showers through early afternoon. A slight chance of rain showers. Waves building to 7 to 10 feet occasionally to 13 feet. .FRIDAY NIGHT...West winds 20 to 30 knots. Waves subsiding to 6 to 9 feet occasionally to 11 feet. .SATURDAY...Northwest gales to 35 knots becoming west 15 to 25 knots by mid afternoon. Waves subsiding to 4 to 7 feet occasionally to 9 feet. .SATURDAY NIGHT...West winds 15 to 25 knots. Waves subsiding to 3 to 5 feet occasionally to 7 feet. .SUNDAY...West winds 15 to 25 knots becoming southwest 10 to 20 knots. Waves subsiding to 2 to 4 feet, then building to 3 to 5 feet occasionally to 7 feet. .MONDAY...Southwest winds 10 to 20 knots backing southeast. A chance of rain showers. Waves building to 1 to 3 feet. $$ LSZ267-180415- Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off shore to the US/Canadian border- 408 PM EDT Wed Apr 17 2024 ...GALE WARNING IN EFFECT UNTIL 8 PM EDT THIS EVENING... .LATE THIS AFTERNOON...Southeast gales to 35 knots. Rain showers. Waves 5 to 9 feet occasionally to 11 feet. .TONIGHT...Southeast gales to 35 knots diminishing to 10 to 20 knots after midnight, then veering west late. Rain showers through midnight, then a chance of rain showers after midnight. Waves subsiding to calm to 2 feet, then building to 2 to 4 feet. .THURSDAY...West winds 15 to 25 knots diminishing to 10 to 20 knots in the afternoon, then becoming southwest 5 to 15 knots late. Waves building to 3 to 5 feet occasionally to 7 feet, then subsiding to 1 to 3 feet. .THURSDAY NIGHT...South winds 5 to 15 knots becoming southwest 10 to 20 knots after midnight, then veering west late. A chance of rain showers. Waves subsiding to calm to 2 feet, then building to 1 to 3 feet. .FRIDAY...West winds 15 to 25 knots increasing to 20 to 30 knots by mid afternoon. A chance of rain showers. Waves building to 5 to 8 feet occasionally to 10 feet. .FRIDAY NIGHT...West winds 20 to 30 knots increasing to gales to 35 knots after midnight. A chance of rain showers, possibly mixed with snow. Waves building to 7 to 10 feet occasionally to 13 feet. .SATURDAY...Northwest gales to 35 knots diminishing to 20 to 30 knots by mid afternoon. Waves subsiding to 5 to 8 feet occasionally to 10 feet. .SATURDAY NIGHT...West winds 20 to 30 knots diminishing to 15 to 25 knots after midnight. Waves subsiding to 3 to 5 feet occasionally to 7 feet. .SUNDAY...West winds 15 to 25 knots diminishing to 10 to 20 knots. Waves subsiding to calm to 2 feet. .MONDAY...Southwest winds 10 to 20 knots backing southeast. A chance of rain showers. Waves calm to 2 feet. $$ LSZ261-180415- MAFOR 1721/ Superior West 11846 11720 12620 11610 11510 11520 11530. Waves 5 to 8 feet subsiding to 3 to 5 feet tonight and Thursday. Superior North Central...GALE WARNING IN EFFECT...11246 11236 11120 11720 12620 11610 11520. Waves 7 to 11 feet subsiding to 3 to 5 feet tonight and Thursday. Superior South Central...GALE WARNING IN EFFECT...11236 11210 11730 12640 11620 11610 11600. Waves 5 to 8 feet subsiding to 3 to 6 feet tonight, then subsiding to 1 to 3 feet Thursday. Superior East...GALE WARNING IN EFFECT...12356 11236 11610 13620 11610. Waves 7 to 10 feet subsiding to 2 to 3 feet tonight, then building to 3 to 5 feet Thursday. $$ WFO MQT Experimental modernized open lake forecast is available online at weather.gov/mqt/glftable Graphical marine forecasts are available online at: weather.gov/greatlakes