####018012571#### FZUS63 KMQT 170746 GLFLS Open Lake Forecast for Lake Superior National Weather Service Marquette MI 346 AM 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...This morning, Lake Superior is between a 30.4 inch Hudson Bay High and a 29.4 inch low over Minnesota and Iowa. This low will weaken to 29.7 inches as it lifts east across northern Lake Michigan tonight before phasing with another 29.7 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. LSZ162-171600- Lake Superior west of a line from Saxon Harbor WI to Grand Portage MN beyond 5NM- 346 AM EDT Wed Apr 17 2024 /246 AM CDT Wed Apr 17 2024/ ...GALE WARNING IN EFFECT UNTIL 2 PM EDT /1 PM CDT/ THIS AFTERNOON... .EARLY THIS MORNING...East gales to 35 knots. A chance of rain showers and a slight chance of thunderstorms. Waves 9 to 12 feet occasionally to 15 feet. .TODAY...Northeast gales to 35 knots diminishing to 20 to 30 knots late. Rain showers. Waves subsiding to 5 to 8 feet occasionally to 10 feet. .TONIGHT...North winds 10 to 20 knots backing west after midnight. A chance of rain showers through midnight. Waves subsiding to 1 to 3 feet. .THURSDAY...Southwest winds 5 to 15 knots increasing to 15 to 25 knots. A slight chance of rain showers by mid afternoon. Waves subsiding to calm to 2 feet, then building to 3 to 5 feet occasionally to 7 feet. .THURSDAY NIGHT...West winds 15 to 25 knots. A slight chance of rain showers. A slight chance of snow showers after midnight. 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. A chance of snow showers through early afternoon. A chance of rain showers. Waves building to 6 to 9 feet occasionally to 11 feet, then subsiding to 4 to 7 feet occasionally to 9 feet. .FRIDAY NIGHT...West winds 20 to 30 knots veering northwest after midnight. Waves subsiding to 3 to 5 feet occasionally to 7 feet. .SATURDAY...West winds 15 to 25 knots diminishing to 10 to 20 knots. Waves subsiding 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. $$ LSZ263-171600- Lake Superior from Saxon Harbor WI to Upper Entrance to Portage Canal MI 5NM off shore to the US/Canadian border including Isle Royale National Park- 346 AM EDT Wed Apr 17 2024 ...GALE WARNING IN EFFECT UNTIL 2 PM EDT THIS AFTERNOON... .EARLY THIS MORNING...East gales to 40 knots. A chance of rain showers. Waves 10 to 14 feet occasionally to 18 feet. .TODAY...East gales to 35 knots becoming northeast 20 to 30 knots late. A chance of rain showers through early afternoon, then rain showers by mid afternoon. Waves subsiding to 8 to 11 feet occasionally to 14 feet. .TONIGHT...North winds 15 to 25 knots becoming northwest 10 to 20 knots after midnight, then becoming west 5 to 15 knots late. A chance of rain showers. Waves subsiding to 2 to 4 feet. .THURSDAY...Southwest winds 5 to 15 knots increasing to 10 to 20 knots in the afternoon, then veering west late. Waves subsiding to 1 to 3 feet, then building to 3 to 5 feet occasionally to 7 feet. .THURSDAY NIGHT...West winds 10 to 20 knots increasing to 15 to 25 knots after midnight. A slight chance of rain showers. Waves building to 3 to 6 feet occasionally to 8 feet. .FRIDAY...West winds 20 to 30 knots with a few gale force gusts to 35 knots possible. A chance of rain showers. Waves building to 6 to 10 feet occasionally to 13 feet. .FRIDAY NIGHT...West winds 15 to 25 knots veering northwest after midnight. Waves subsiding to 3 to 6 feet occasionally to 8 feet. .SATURDAY...West winds 15 to 25 knots diminishing to 10 to 20 knots. Waves subsiding to 2 to 4 feet. .SUNDAY...West winds 15 to 25 knots becoming southwest 10 to 20 knots. Waves building to 3 to 5 feet occasionally to 7 feet, then subsiding to 1 to 3 feet. $$ LSZ264-171600- Lake Superior from Upper Entrance to Portage Canal to Manitou Island MI 5NM off shore to the US/Canadian Border- 346 AM EDT Wed Apr 17 2024 ...GALE WARNING IN EFFECT THROUGH THIS EVENING... .EARLY THIS MORNING...Southeast gales to 45 knots. Rain showers. Waves 10 to 14 feet occasionally to 18 feet. .TODAY...East gales to 40 knots. A chance of rain showers through early afternoon, then rain showers by mid afternoon. Waves subsiding to 8 to 11 feet occasionally to 14 feet. .TONIGHT...East winds 15 to 25 knots becoming north 10 to 20 knots after midnight, then backing northwest 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 after midnight. A slight chance of rain showers. Waves building to 3 to 6 feet occasionally to 8 feet. .FRIDAY...West winds 20 to 30 knots with a few gale force gusts to 35 knots possible. Waves building to 6 to 10 feet occasionally to 13 feet. .FRIDAY NIGHT...West winds 15 to 25 knots becoming northwest 20 to 30 knots after midnight. Waves subsiding to 4 to 8 feet occasionally to 10 feet. .SATURDAY...Northwest winds 20 to 30 knots becoming west 10 to 20 knots. Waves subsiding to 2 to 4 feet, then building to 3 to 5 feet occasionally to 7 feet. .SUNDAY...West winds 15 to 25 knots diminishing to 10 to 20 knots. Waves building to 3 to 5 feet occasionally to 7 feet, then subsiding to 1 to 3 feet. $$ LSZ265-171600- Lake Superior West of Line from Manitou Island to Marquette MI Beyond 5NM from shore- 346 AM EDT Wed Apr 17 2024 ...GALE WARNING IN EFFECT THROUGH THIS EVENING... .EARLY THIS MORNING...Southeast gales to 35 knots. Rain showers likely. Waves 8 to 11 feet occasionally to 14 feet. .TODAY...Southeast gales to 35 knots backing east in the afternoon, then diminishing to 20 to 30 knots late. A chance of rain showers through early afternoon, then rain showers by mid afternoon. Waves building to 9 to 12 feet occasionally to 15 feet, then subsiding to 7 to 10 feet occasionally to 13 feet. .TONIGHT...East winds 10 to 20 knots becoming west 20 to 30 knots after midnight. A chance of rain showers. Waves subsiding to 3 to 6 feet occasionally to 8 feet. .THURSDAY...West winds 10 to 20 knots diminishing to 5 to 15 knots in the afternoon, then increasing to 10 to 20 knots late. A slight chance of rain showers by mid afternoon. Waves subsiding to calm to 2 feet. .THURSDAY NIGHT...West winds 5 to 15 knots increasing to 10 to 20 knots after midnight. A slight chance of rain showers through midnight. Waves building to 1 to 3 feet. .FRIDAY...West winds 20 to 30 knots. A chance of rain showers. Waves building to 3 to 6 feet occasionally to 8 feet. .FRIDAY NIGHT...West winds 20 to 30 knots. A chance of rain showers, possibly mixed with snow. Waves 3 to 6 feet occasionally to 8 feet. .SATURDAY...Northwest winds 15 to 25 knots backing west. Waves subsiding to calm to 2 feet, then building to 1 to 3 feet. .SUNDAY...West winds 15 to 25 knots. Waves subsiding to calm to 2 feet. $$ LSZ266-171600- 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 AM EDT Wed Apr 17 2024 ...GALE WARNING IN EFFECT THROUGH THIS EVENING... .EARLY THIS MORNING...Southeast gales to 45 knots. Rain showers. Waves 9 to 12 feet occasionally to 15 feet building to 10 to 14 feet occasionally to 18 feet. .TODAY...Southeast gales to 40 knots backing east late. A chance of rain showers through early afternoon, then rain showers by mid afternoon. Waves subsiding to 8 to 11 feet occasionally to 14 feet. .TONIGHT...East gales to 35 knots becoming west 20 to 30 knots after midnight. A chance of rain showers. Waves subsiding to 3 to 6 feet occasionally to 8 feet. .THURSDAY...West winds 15 to 25 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 chance of rain showers. Waves building to 6 to 9 feet occasionally to 11 feet. .FRIDAY NIGHT...West winds 20 to 30 knots veering northwest after midnight. A chance of rain showers through midnight. A chance of snow showers. Waves subsiding to 5 to 8 feet occasionally to 10 feet, then building to 6 to 9 feet occasionally to 11 feet. .SATURDAY...Northwest winds 20 to 30 knots becoming west 15 to 25 knots. Waves building to 7 to 10 feet occasionally to 13 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. $$ LSZ267-171600- Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off shore to the US/Canadian border- 346 AM EDT Wed Apr 17 2024 ...GALE WARNING IN EFFECT THROUGH THIS EVENING... .EARLY THIS MORNING...Southeast gales to 40 knots. Rain showers. Waves 6 to 9 feet occasionally to 11 feet. .TODAY...Southeast gales to 40 knots. A chance of rain showers. Waves building to 9 to 12 feet occasionally to 15 feet, then subsiding to 7 to 10 feet occasionally to 13 feet. .TONIGHT...Southeast gales to 35 knots diminishing to 15 to 25 knots after midnight, then veering west late. Rain showers likely through midnight, then a chance of rain showers after midnight. Waves subsiding to calm to 2 feet, then building to 3 to 5 feet occasionally to 7 feet. .THURSDAY...West winds 15 to 25 knots diminishing to 5 to 15 knots. A slight chance of rain showers by mid afternoon. Waves building to 3 to 6 feet occasionally to 8 feet, then subsiding to 1 to 3 feet. .THURSDAY NIGHT...South winds 5 to 15 knots becoming west 10 to 20 knots after midnight. A chance of rain showers. Waves subsiding to calm to 2 feet, then building to 1 to 3 feet. .FRIDAY...West winds 15 to 25 knots increasing to 20 to 30 knots by mid afternoon. A chance of rain showers. Waves building to 5 to 8 feet occasionally to 10 feet. .FRIDAY NIGHT...West winds 20 to 30 knots. A chance of rain showers through midnight. A chance of snow showers. Waves building to 7 to 10 feet occasionally to 13 feet. .SATURDAY...Northwest winds 20 to 30 knots backing west. Waves subsiding to 2 to 4 feet. .SUNDAY...West winds 15 to 25 knots backing southwest. Waves subsiding to 1 to 3 feet. $$ LSZ261-171600- MAFOR 1709/ Superior West...GALE WARNING IN EFFECT...11250 11150 12156 11146 11820 11720 11610. Waves 9 to 12 feet subsiding to 7 to 10 feet today. Waves 6 to 9 feet subsiding to 3 to 5 feet tonight. Superior North Central...GALE WARNING IN EFFECT...11366 12350 12256 11236 11220 11810. Waves 10 to 14 feet today. Waves 9 to 12 feet subsiding to 5 to 8 feet tonight. Superior South Central...GALE WARNING IN EFFECT...11356 12340 12246 11210 11520 11640. Waves 7 to 11 feet today subsiding to 3 to 6 feet tonight. Superior East...GALE WARNING IN EFFECT...12356 12350 12356 11330 11420. Waves 7 to 11 feet building to 9 to 13 feet today. Waves 8 to 11 feet subsiding to 2 to 4 feet tonight. $$ GS Experimental modernized open lake forecast is available online at weather.gov/mqt/glftable Graphical marine forecasts are available online at: weather.gov/greatlakes