####018011718#### FZUS63 KMQT 301345 GLFLS Open Lake Forecast for Lake Superior National Weather Service Marquette MI 945 AM EDT Tue Apr 30 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 29.8 inch low pressure is currently over Lake Superior and tracks east across Ontario while weakening today. In its wake, a weak high pressure ridge of 29.9 inches shifts east across Lake Superior. By this evening, a 29.6 inch low pressure over southern Minnesota is expected to track northeast across western Lake Superior tonight. This low pressure weakens as it tracks across the lake over Ontario by Wednesday evening. Ridging builds to 30.1 inches over the lake Wednesday night and Thursday ahead of a 29.6 inch low pressure tracking across the Upper Mississippi Valley Thursday and Thursday night then to northwestern Ontario on Friday. A weak 29.9 inch trough pivots across the lake on Saturday ahead of ridging that builds to 30.0 inches over the Great Lakes Basin on Sunday. LSZ162-302145- Lake Superior west of a line from Saxon Harbor WI to Grand Portage MN beyond 5NM- 945 AM EDT Tue Apr 30 2024 /845 AM CDT Tue Apr 30 2024/ .REST OF TODAY...West winds 5 to 15 knots backing south late. Waves 1 to 3 feet subsiding to calm to 2 feet. .TONIGHT...East winds 10 to 20 knots increasing to 15 to 25 knots after midnight, then backing northeast late. Rain showers. Waves building to 4 to 7 feet occasionally to 9 feet, then subsiding to 3 to 6 feet occasionally to 8 feet. .WEDNESDAY...West winds 10 to 20 knots increasing to 15 to 25 knots in the afternoon, then diminishing to 10 to 20 knots late. A chance of rain showers through early afternoon. Waves subsiding to 2 to 4 feet, then building to 3 to 5 feet occasionally to 7 feet. .WEDNESDAY NIGHT...West winds 5 to 15 knots veering northeast after midnight. Waves subsiding to calm to 2 feet. .THURSDAY...Northeast winds 15 to 25 knots increasing to 20 to 30 knots by mid afternoon. A chance of rain showers. Waves building to 6 to 9 feet occasionally to 11 feet. .THURSDAY NIGHT...East winds 20 to 30 knots. Rain showers likely. Waves subsiding to 3 to 5 feet occasionally to 7 feet. .FRIDAY...Southwest winds 20 to 30 knots becoming west 15 to 25 knots. A chance of rain showers. Waves subsiding to calm to 2 feet. .SATURDAY...Southwest winds 10 to 20 knots veering north. A chance of rain showers. Waves building to 1 to 3 feet, then subsiding to calm to 2 feet. $$ LSZ263-302145- Lake Superior from Saxon Harbor WI to Upper Entrance to Portage Canal MI 5NM off shore to the US/Canadian border including Isle Royale National Park- 945 AM EDT Tue Apr 30 2024 .REST OF TODAY...West winds 5 to 15 knots backing southwest late. Waves 2 to 4 feet subsiding to calm to 2 feet. .TONIGHT...East winds 5 to 15 knots increasing to 15 to 25 knots. A chance of rain showers through midnight, then rain showers after midnight. Waves building to 3 to 6 feet occasionally to 8 feet. .WEDNESDAY...Southwest winds 15 to 25 knots becoming west 20 to 30 knots in the afternoon, then diminishing to 15 to 25 knots late. A chance of rain showers through early afternoon. Waves building to 4 to 7 feet occasionally to 9 feet, then subsiding to 3 to 6 feet occasionally to 8 feet. .WEDNESDAY NIGHT...West winds 5 to 15 knots veering northwest after midnight. Waves subsiding to calm to 2 feet. .THURSDAY...East winds 10 to 20 knots increasing to 15 to 25 knots by mid afternoon. A chance of rain showers by mid afternoon. Waves building to 2 to 4 feet. .THURSDAY NIGHT...East winds 15 to 25 knots increasing to 20 to 30 knots after midnight. Rain showers likely. Waves building to 3 to 6 feet occasionally to 8 feet. .FRIDAY...Southwest winds 20 to 30 knots diminishing to 15 to 25 knots. A chance of rain showers. Waves subsiding to 1 to 3 feet. .SATURDAY...Southwest winds 5 to 15 knots becoming west 10 to 20 knots. A chance of rain showers. Waves subsiding to calm to 2 feet, then building to 1 to 3 feet. $$ LSZ264-302145- Lake Superior from Upper Entrance to Portage Canal to Manitou Island MI 5NM off shore to the US/Canadian Border- 945 AM EDT Tue Apr 30 2024 .REST OF TODAY...Northwest winds 10 to 20 knots backing west in the afternoon, then diminishing to 5 to 15 knots late. Patchy fog by late morning. A slight chance of rain showers by late morning. Waves 2 to 4 feet subsiding to calm to 2 feet. .TONIGHT...Southeast winds 5 to 15 knots becoming east 10 to 20 knots after midnight, then increasing to 15 to 25 knots late. Rain showers after midnight. Waves building to 3 to 6 feet occasionally to 8 feet. .WEDNESDAY...Southeast winds 15 to 25 knots becoming west 20 to 30 knots in the afternoon. Rain showers likely through early afternoon. Waves building to 4 to 7 feet occasionally to 9 feet, then subsiding to 3 to 6 feet occasionally to 8 feet. .WEDNESDAY NIGHT...Northwest winds 10 to 20 knots diminishing to 5 to 15 knots after midnight. Waves subsiding to calm to 2 feet. .THURSDAY...Northeast winds 5 to 15 knots becoming east 10 to 20 knots by mid afternoon. Waves calm to 2 feet. .THURSDAY NIGHT...East winds 20 to 30 knots. A chance of rain showers through midnight. Rain showers likely after midnight. Waves building to 3 to 6 feet occasionally to 8 feet. .FRIDAY...Southwest winds 20 to 30 knots diminishing to 15 to 25 knots. A chance of rain showers. Waves building to 4 to 7 feet occasionally to 9 feet, then subsiding to 2 to 4 feet. .SATURDAY...Southwest winds 10 to 20 knots veering west. Waves subsiding to calm to 2 feet, then building to 1 to 3 feet. $$ LSZ265-302145- Lake Superior West of Line from Manitou Island to Marquette MI Beyond 5NM from shore- 945 AM EDT Tue Apr 30 2024 .REST OF TODAY...West winds 10 to 20 knots becoming northwest 5 to 15 knots late. Waves 1 to 3 feet subsiding to calm to 2 feet. .TONIGHT...Southeast winds 5 to 15 knots increasing to 15 to 25 knots. Rain showers after midnight. Waves building to 3 to 5 feet occasionally to 7 feet. .WEDNESDAY...Southeast winds 10 to 20 knots becoming west to 30 knots with a few gale force gusts to 35 knots possible in the afternoon. A chance of rain showers through early afternoon. Waves subsiding to 2 to 4 feet, then building to 6 to 9 feet occasionally to 11 feet. .WEDNESDAY NIGHT...West winds 10 to 20 knots diminishing to 5 to 15 knots after midnight. Waves subsiding to calm to 2 feet. .THURSDAY...East winds 5 to 15 knots increasing to 10 to 20 knots by mid afternoon. A chance of rain showers by mid afternoon. Waves calm to 2 feet. .THURSDAY NIGHT...East winds 10 to 20 knots becoming southeast 15 to 25 knots after midnight. Rain showers likely and a chance of thunderstorms. Waves building to 2 to 4 feet. .FRIDAY...Southwest winds 15 to 25 knots diminishing to 10 to 20 knots. A chance of showers. Waves subsiding to calm to 2 feet. .SATURDAY...Southwest winds 10 to 20 knots backing southeast. A chance of rain showers. Waves building to 1 to 3 feet. $$ LSZ266-302145- 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- 945 AM EDT Tue Apr 30 2024 .REST OF TODAY...West winds 10 to 20 knots veering northwest late. Patchy fog by late morning. Waves 1 to 3 feet. .TONIGHT...East winds 5 to 15 knots veering southeast after midnight, then increasing to 10 to 20 knots late. Rain showers after midnight. Waves subsiding to calm to 2 feet, then building to 3 to 5 feet occasionally to 7 feet. .WEDNESDAY...Southeast winds 15 to 25 knots becoming west to 30 knots with a few gale force gusts to 35 knots possible in the afternoon. A chance of rain showers. Waves building to 6 to 9 feet occasionally to 11 feet. .WEDNESDAY NIGHT...West winds 10 to 20 knots becoming northwest 5 to 15 knots after midnight. Waves subsiding to 1 to 3 feet. .THURSDAY...North winds 5 to 15 knots becoming east 10 to 20 knots by mid afternoon. A chance of rain showers by mid afternoon. Waves subsiding to calm to 2 feet. .THURSDAY NIGHT...East winds 15 to 25 knots becoming southeast 20 to 30 knots after midnight. Rain showers likely and a chance of thunderstorms. Waves building to 3 to 6 feet occasionally to 8 feet. .FRIDAY...South winds 20 to 30 knots becoming southwest 15 to 25 knots. A chance of rain showers. Waves building to 4 to 7 feet occasionally to 9 feet, then subsiding to 1 to 3 feet. .SATURDAY...Southwest winds 10 to 20 knots becoming east 15 to 25 knots. A chance of rain showers. Waves subsiding to calm to 2 feet, then building to 1 to 3 feet. $$ LSZ267-302145- Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off shore to the US/Canadian border- 945 AM EDT Tue Apr 30 2024 .REST OF TODAY...West winds 10 to 20 knots. Patchy fog by late morning. A slight chance of rain showers by late morning. Waves calm to 2 feet building to 1 to 3 feet. .TONIGHT...West winds 5 to 15 knots backing southeast after midnight, then increasing to 10 to 20 knots late. Rain showers after midnight. Waves subsiding to calm to 2 feet, then building to 1 to 3 feet. .WEDNESDAY...Southeast winds 15 to 25 knots veering west in the afternoon, then increasing to 20 to 30 knots late. A chance of rain showers. Waves building to 3 to 5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet. .WEDNESDAY NIGHT...West winds 15 to 25 knots diminishing to 10 to 20 knots after midnight. Waves subsiding to 2 to 4 feet. .THURSDAY...Northwest winds 10 to 20 knots veering east by mid afternoon. Waves subsiding to calm to 2 feet. .THURSDAY NIGHT...East winds 10 to 20 knots becoming southeast 20 to 30 knots after midnight. Rain showers likely. A chance of thunderstorms after midnight. Waves building to 3 to 6 feet occasionally to 8 feet. .FRIDAY...Southeast winds 15 to 25 knots becoming south 10 to 20 knots. Rain showers likely. Waves building to 4 to 7 feet occasionally to 9 feet, then subsiding to calm to 2 feet. .SATURDAY...Southwest winds 10 to 20 knots backing east. A chance of rain showers. Waves calm to 2 feet. $$ LSZ261-302145- MAFOR 3015/ Superior West 11610 11510 11400 11210 11226 12236 11630. Waves 2 to 3 feet this afternoon. Waves 1 to 2 feet building to 4 to 7 feet tonight. Waves 4 to 7 feet subsiding to 3 to 5 feet Wednesday morning. Superior North Central 11720 11620 11610 11400 11310 11320 12336. Waves 2 to 3 feet this afternoon. Waves 1 to 2 feet building to 2 to 4 feet tonight. Waves 3 to 6 feet building to 4 to 7 feet Wednesday morning. Superior South Central 11630 11720 11800 11210 11310 11320 11336 11430. Waves 1 to 3 feet this afternoon. Waves 1 to 2 feet building to 2 to 4 feet tonight. Waves 3 to 5 feet Wednesday morning. Superior East 13620 11600 11400 11310 11326 11336. Waves 1 to 3 feet this afternoon and tonight. Waves 2 to 4 feet building to 3 to 5 feet Wednesday morning. $$ TAP Experimental modernized open lake forecast is available online at weather.gov/mqt/glftable Graphical marine forecasts are available online at: weather.gov/greatlakes