####018013274#### FZUS63 KMQT 170125 GLFLS Open Lake Forecast for Lake Superior National Weather Service Marquette MI 925 PM EDT Tue Apr 16 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...High pressure centered over Hudson Bay at 30.5 inches this evening, is extending a 30.1 inch ridge over the eastern section of Lake Superior. Meanwhile, a 29.3 inch low pressure over central Iowa tonight tracks northeast, reaching Wisconsin Wednesday morning while filling to 29.5 inches. The low weakens further to 29.7 inches as it lifts east across the Lower Peninsula of Michigan on Wednesday night 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. LSZ162-170930- Lake Superior west of a line from Saxon Harbor WI to Grand Portage MN beyond 5NM- 925 PM EDT Tue Apr 16 2024 /825 PM CDT Tue Apr 16 2024/ ...GALE WARNING IN EFFECT THROUGH WEDNESDAY AFTERNOON... .REST OF TONIGHT...East gales to 40 knots. Rain showers by late evening, then a chance of rain showers after midnight. Waves 11 to 15 feet occasionally to 19 feet subsiding to 9 to 12 feet occasionally to 15 feet. .WEDNESDAY...East gales to 35 knots backing northeast in the afternoon, then diminishing to 20 to 30 knots late. Rain showers. Waves subsiding to 6 to 9 feet occasionally to 11 feet. .WEDNESDAY NIGHT...North winds 10 to 20 knots backing west after midnight. A chance of rain showers through midnight. Waves subsiding to 2 to 4 feet. .THURSDAY...Southwest winds 15 to 25 knots. A slight chance of rain showers by mid afternoon. Waves building to 3 to 6 feet occasionally to 8 feet. .THURSDAY NIGHT...West winds 15 to 25 knots. Waves 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 chance of rain showers, possibly mixed with snow. Waves building to 4 to 8 feet occasionally to 10 feet. .FRIDAY NIGHT...West gales to 35 knots becoming northwest 20 to 30 knots after midnight. Waves subsiding to 2 to 4 feet. .SATURDAY...West winds 15 to 25 knots diminishing to 10 to 20 knots. Waves subsiding to calm to 2 feet. .SUNDAY...Southwest winds 15 to 25 knots. Waves building to 2 to 4 feet, then subsiding to 1 to 3 feet. $$ LSZ263-170930- Lake Superior from Saxon Harbor WI to Upper Entrance to Portage Canal MI 5NM off shore to the US/Canadian border including Isle Royale National Park- 925 PM EDT Tue Apr 16 2024 ...GALE WARNING IN EFFECT THROUGH WEDNESDAY AFTERNOON... .REST OF TONIGHT...East gales to 40 knots. A chance of rain showers by late evening, then rain showers after midnight. Waves 8 to 11 feet occasionally to 14 feet subsiding to 7 to 10 feet occasionally to 13 feet, then building to 11 to 15 feet occasionally to 19 feet. .WEDNESDAY...East gales to 35 knots diminishing to 20 to 30 knots late. A chance of rain showers through early afternoon, then rain showers by mid afternoon. Waves building to 12 to 17 feet occasionally to 21 feet, then subsiding to 9 to 12 feet occasionally to 15 feet. .WEDNESDAY NIGHT...North winds 15 to 25 knots becoming west 10 to 20 knots after midnight. A chance of rain showers. Waves subsiding to 2 to 4 feet. .THURSDAY...West winds 15 to 25 knots. A slight chance of rain showers by mid afternoon. Waves building to 3 to 6 feet occasionally to 8 feet. .THURSDAY NIGHT...West winds 10 to 20 knots increasing to 15 to 25 knots after midnight. Waves subsiding to 2 to 4 feet, then building to 3 to 5 feet occasionally to 7 feet. .FRIDAY...West gales to 35 knots. A chance of rain showers, possibly mixed with snow. Waves building to 6 to 9 feet occasionally to 11 feet. .FRIDAY NIGHT...West winds 20 to 30 knots becoming northwest 15 to 25 knots after midnight. Waves subsiding to 3 to 5 feet occasionally to 7 feet. .SATURDAY...West winds 15 to 25 knots diminishing to 10 to 20 knots. Waves subsiding to 1 to 3 feet. .SUNDAY...Southwest winds 15 to 25 knots diminishing to 10 to 20 knots. Waves building to 2 to 4 feet. $$ LSZ264-170930- Lake Superior from Upper Entrance to Portage Canal to Manitou Island MI 5NM off shore to the US/Canadian Border- 925 PM EDT Tue Apr 16 2024 ...GALE WARNING IN EFFECT THROUGH WEDNESDAY EVENING... .REST OF TONIGHT...East gales to 40 knots. A slight chance of rain showers by late evening, then rain showers after midnight. Waves 5 to 8 feet occasionally to 10 feet building to 10 to 14 feet occasionally to 18 feet. .WEDNESDAY...East gales to 40 knots. A chance of rain showers through early afternoon, then rain showers by mid afternoon. Waves building to 12 to 17 feet occasionally to 21 feet, then subsiding to 9 to 12 feet occasionally to 15 feet. .WEDNESDAY NIGHT...East winds 15 to 25 knots becoming west 10 to 20 knots after midnight, then increasing to 15 to 25 knots late. Rain showers likely through midnight, then a chance of rain showers after midnight. Waves subsiding to 3 to 5 feet occasionally to 7 feet. .THURSDAY...West winds 15 to 25 knots backing southwest by mid afternoon. Waves subsiding to 2 to 4 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. Waves subsiding to 2 to 4 feet, then building to 3 to 6 feet occasionally to 8 feet. .FRIDAY...West gales to 35 knots. Waves building to 6 to 10 feet occasionally to 13 feet. .FRIDAY NIGHT...West gales to 35 knots becoming northwest 15 to 25 knots after midnight. Waves subsiding to 3 to 6 feet occasionally to 8 feet. .SATURDAY...Northwest winds 15 to 25 knots becoming west 10 to 20 knots. Waves subsiding to 1 to 3 feet. .SUNDAY...West winds 15 to 25 knots. Waves building to 3 to 5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet. $$ LSZ265-170930- Lake Superior West of Line from Manitou Island to Marquette MI Beyond 5NM from shore- 925 PM EDT Tue Apr 16 2024 ...GALE WARNING IN EFFECT THROUGH WEDNESDAY EVENING... .REST OF TONIGHT...East winds 20 to 30 knots increasing to gales to 35 knots after midnight. A chance of rain showers by late evening, then rain showers after midnight. Waves 5 to 8 feet occasionally to 10 feet building to 8 to 11 feet occasionally to 14 feet. .WEDNESDAY...East gales to 35 knots diminishing to 20 to 30 knots in the afternoon. A chance of rain showers through early afternoon, then rain showers by mid afternoon. Waves building to 10 to 14 feet occasionally to 18 feet, then subsiding to 8 to 11 feet occasionally to 14 feet. .WEDNESDAY NIGHT...Southeast winds 10 to 20 knots veering west after midnight, then increasing to 15 to 25 knots late. A chance of rain showers. Waves subsiding to 2 to 4 feet. .THURSDAY...West winds 10 to 20 knots. A slight chance of rain showers by mid afternoon. Waves subsiding to calm to 2 feet. .THURSDAY NIGHT...West winds 5 to 15 knots increasing to 10 to 20 knots after midnight. Waves building to 1 to 3 feet. .FRIDAY...West winds 20 to 30 knots increasing to gales to 35 knots by mid afternoon. A chance of rain showers. Waves building to 3 to 6 feet occasionally to 8 feet. .FRIDAY NIGHT...West gales to 35 knots diminishing to 20 to 30 knots after midnight. A chance of rain showers through midnight. A chance of snow showers. Waves 3 to 5 feet occasionally to 7 feet. .SATURDAY...Northwest winds 20 to 30 knots becoming west 15 to 25 knots. Waves subsiding to calm to 2 feet. .SUNDAY...West winds 15 to 25 knots. Waves calm to 2 feet. $$ LSZ266-170930- 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- 925 PM EDT Tue Apr 16 2024 ...GALE WARNING IN EFFECT THROUGH WEDNESDAY EVENING... .REST OF TONIGHT...East gales to 40 knots. A slight chance of rain showers by late evening, then rain showers after midnight. Waves 3 to 6 feet occasionally to 8 feet building to 10 to 14 feet occasionally to 18 feet. .WEDNESDAY...East gales to 40 knots. A chance of rain showers through early afternoon, then rain showers by mid afternoon. Waves building to 11 to 15 feet occasionally to 19 feet, then subsiding to 9 to 12 feet occasionally to 15 feet. .WEDNESDAY NIGHT...Southeast gales to 35 knots diminishing to 10 to 20 knots after midnight, then becoming west 15 to 25 knots late. Rain showers likely through midnight, then a chance of rain showers after midnight. Waves subsiding to 3 to 5 feet occasionally to 7 feet. .THURSDAY...West winds 15 to 25 knots. A slight chance of rain showers by mid afternoon. Waves subsiding to 2 to 4 feet. .THURSDAY NIGHT...Southwest winds 10 to 20 knots veering west 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 increasing to gales to 35 knots by mid afternoon. A chance of rain showers. Waves building to 6 to 9 feet occasionally to 11 feet. .FRIDAY NIGHT...West gales to 35 knots veering northwest after midnight. A chance of rain showers through midnight. A chance of snow showers. Waves subsiding to 4 to 8 feet occasionally to 10 feet. .SATURDAY...Northwest winds 20 to 30 knots becoming west 15 to 25 knots. Waves subsiding to 2 to 4 feet. .SUNDAY...West winds 15 to 25 knots. Waves building to 3 to 5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet. $$ LSZ267-170930- Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off shore to the US/Canadian border- 925 PM EDT Tue Apr 16 2024 ...GALE WARNING IN EFFECT FROM 2 AM EDT WEDNESDAY THROUGH WEDNESDAY EVENING... .REST OF TONIGHT...East winds 20 to 30 knots increasing to gales to 35 knots after midnight, then becoming southeast gales to 40 knots late. Rain showers after midnight. Waves 2 to 4 feet building to 7 to 10 feet occasionally to 13 feet. .WEDNESDAY...Southeast gales to 45 knots. Rain showers. Waves building to 9 to 12 feet occasionally to 15 feet, then subsiding to 7 to 10 feet occasionally to 13 feet. .WEDNESDAY NIGHT...Southeast gales to 35 knots diminishing to 10 to 20 knots after midnight, then becoming west 15 to 25 knots late. Rain showers likely through midnight, then a chance of rain showers after midnight. Waves subsiding to 1 to 3 feet, then building to 2 to 4 feet. .THURSDAY...West winds 15 to 25 knots diminishing to 10 to 20 knots by mid afternoon. A slight chance of rain showers. Waves building to 3 to 5 feet occasionally to 7 feet, then subsiding to 1 to 3 feet. .THURSDAY NIGHT...South winds 10 to 20 knots veering west after midnight. A chance of rain showers. Waves subsiding to calm to 2 feet, then building to 1 to 3 feet. .FRIDAY...West winds 15 to 25 knots increasing to gales to 35 knots by mid afternoon. A chance of rain showers. Waves building to 5 to 8 feet occasionally to 10 feet. .FRIDAY NIGHT...West winds 20 to 30 knots. A chance of rain showers through midnight. A chance of snow showers. Waves subsiding to 4 to 8 feet occasionally to 10 feet. .SATURDAY...Northwest gales to 35 knots becoming west 15 to 25 knots. Waves subsiding to 2 to 4 feet. .SUNDAY...West winds 15 to 25 knots backing southwest. Waves subsiding to 1 to 3 feet, then building to 2 to 4 feet. $$ LSZ261-170930- MAFOR 1703/ Superior West...GALE WARNING IN EFFECT...12256 12250 12156 11146 11820. Waves 9 to 13 feet overnight. Waves 8 to 12 feet Wednesday. Waves 6 to 9 feet subsiding to 4 to 7 feet Wednesday evening. Superior North Central...GALE WARNING IN EFFECT...11250 11256 11266 11260 11250 12256 11246. Waves 5 to 8 feet building to 10 to 13 feet overnight. Waves 11 to 15 feet Wednesday. Waves 10 to 13 feet subsiding to 7 to 10 feet Wednesday evening. Superior South Central...GALE WARNING IN EFFECT...11240 11356 11256 11350 11250 12246 11320. Waves 6 to 11 feet overnight building to 9 to 12 feet Wednesday. Waves 8 to 11 feet subsiding to 5 to 8 feet Wednesday evening. Superior East...GALE WARNING IN EFFECT...12250 11356 13366 12356. Waves 5 to 9 feet overnight building to 8 to 12 feet Wednesday. Waves 8 to 11 feet subsiding to 6 to 9 feet Wednesday evening. $$ JSS Experimental modernized open lake forecast is available online at weather.gov/mqt/glftable Graphical marine forecasts are available online at: weather.gov/greatlakes