####018009379#### FZUS63 KMQT 131951 GLFLS Open Lake Forecast for Lake Superior National Weather Service Marquette MI 351 PM EDT Mon May 13 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 30.2 inch high pressure over western Hudson Bay is extending a 29.9 inch ridge over western Lake Superior this afternoon. This ridge builds to 30.0 inches tonight and will remain over Lake Superior until Wednesday night. Meanwhile, a 29.7 inch trough emerging over the Northern Plains on Tuesday weakens to 29.8 inches as it shifts to the Upper Mississippi Valley during Wednesday night and Thursday. The trough deepens to 29.7 inches over Lake Superior Thursday night and remains through Friday. As the trough arrives in James Bay midday Saturday, weak ridging of 29.8 inches will be over the lake as another low pressure transits through the Northern Plains. LSZ162-140400- Lake Superior west of a line from Saxon Harbor WI to Grand Portage MN beyond 5NM- 351 PM EDT Mon May 13 2024 /251 PM CDT Mon May 13 2024/ .LATE THIS AFTERNOON...East winds 5 to 15 knots. Waves calm to 2 feet. .TONIGHT...Northeast winds 5 to 15 knots. Waves calm to 2 feet. .TUESDAY...Northeast winds 10 to 20 knots becoming east 5 to 15 knots in the afternoon, then backing northeast late. Waves calm to 2 feet. .TUESDAY NIGHT...Northeast winds 5 to 15 knots. Waves calm to 2 feet. .WEDNESDAY...Northeast winds 10 to 20 knots increasing to 15 to 25 knots by mid afternoon. A slight chance of rain showers by mid afternoon. Waves building to 3 to 6 feet occasionally to 8 feet. .WEDNESDAY NIGHT...Northeast winds 10 to 20 knots. A chance of rain showers through midnight, then rain showers likely after midnight. Waves subsiding to 1 to 3 feet. .THURSDAY...East winds 10 to 20 knots backing northeast by mid afternoon. Rain showers likely through early afternoon, then a chance of rain showers by mid afternoon. Waves building to 2 to 4 feet, then subsiding to 1 to 3 feet. .THURSDAY NIGHT...Northeast winds 10 to 20 knots becoming northwest 5 to 15 knots after midnight. A chance of rain showers. Waves subsiding to calm to 2 feet. .FRIDAY...East winds 5 to 15 knots becoming northeast 10 to 20 knots. A chance of rain showers. Waves calm to 2 feet. .SATURDAY...East winds 10 to 20 knots backing northeast. A chance of showers. Waves calm to 2 feet. $$ LSZ263-140400- Lake Superior from Saxon Harbor WI to Upper Entrance to Portage Canal MI 5NM off shore to the US/Canadian border including Isle Royale National Park- 351 PM EDT Mon May 13 2024 .LATE THIS AFTERNOON...East winds 5 to 15 knots. Waves calm to 2 feet. .TONIGHT...East winds 5 to 15 knots backing north after midnight, then veering northeast late. Waves calm to 2 feet. .TUESDAY...Northeast winds 5 to 15 knots. Waves calm to 2 feet. .TUESDAY NIGHT...Northeast winds 5 to 15 knots veering east after midnight, then diminishing to less than 10 knots late. Waves calm to 2 feet. .WEDNESDAY...Northeast winds 5 to 15 knots. Waves building to 1 to 3 feet. .WEDNESDAY NIGHT...East winds 5 to 15 knots. A chance of rain showers. Waves subsiding to calm to 2 feet. .THURSDAY...East winds 5 to 15 knots. A chance of rain showers. Waves building to 1 to 3 feet. .THURSDAY NIGHT...Northeast winds 5 to 15 knots backing northwest after midnight. A chance of rain showers. Waves subsiding to calm to 2 feet. .FRIDAY...West winds 5 to 15 knots backing east. A chance of rain showers. Waves calm to 2 feet. .SATURDAY...East winds 5 to 15 knots veering west. A chance of rain showers. Waves calm to 2 feet. $$ LSZ264-140400- Lake Superior from Upper Entrance to Portage Canal to Manitou Island MI 5NM off shore to the US/Canadian Border- 351 PM EDT Mon May 13 2024 .LATE THIS AFTERNOON...Northwest winds 10 to 20 knots. Waves calm to 2 feet. .TONIGHT...North winds 10 to 20 knots diminishing to 5 to 15 knots after midnight. Waves calm to 2 feet. .TUESDAY...North winds 5 to 15 knots backing west late. Waves calm to 2 feet. .TUESDAY NIGHT...Northwest winds less than 10 knots veering north after midnight, then veering east late. Waves calm to 2 feet. .WEDNESDAY...East winds 5 to 15 knots. Waves calm to 2 feet. .WEDNESDAY NIGHT...East winds 5 to 15 knots. Waves calm to 2 feet. .THURSDAY...East winds 5 to 15 knots. A chance of rain showers. Waves calm to 2 feet. .THURSDAY NIGHT...Southeast winds 5 to 15 knots veering south after midnight. A chance of rain showers. Waves calm to 2 feet. .FRIDAY...West winds 5 to 15 knots backing southeast. A chance of rain showers. Waves calm to 2 feet. .SATURDAY...South winds 5 to 15 knots. A chance of rain showers. Waves calm to 2 feet. $$ LSZ265-140400- Lake Superior West of Line from Manitou Island to Marquette MI Beyond 5NM from shore- 351 PM EDT Mon May 13 2024 .LATE THIS AFTERNOON...North winds 10 to 20 knots. Waves calm to 2 feet. .TONIGHT...Northwest winds 5 to 15 knots veering north after midnight, then increasing to 10 to 20 knots late. Waves calm to 2 feet. .TUESDAY...North winds 10 to 20 knots diminishing to 5 to 15 knots in the afternoon. Waves calm to 2 feet. .TUESDAY NIGHT...North winds 5 to 15 knots. Waves calm to 2 feet. .WEDNESDAY...East winds 5 to 15 knots. Waves calm to 2 feet. .WEDNESDAY NIGHT...East winds 5 to 15 knots veering southeast after midnight. Waves calm to 2 feet. .THURSDAY...East winds 5 to 15 knots increasing to 10 to 20 knots by mid afternoon. A chance of rain showers. Waves calm to 2 feet. .THURSDAY NIGHT...Southeast winds 10 to 20 knots veering southwest after midnight. A chance of rain showers. Waves calm to 2 feet. .FRIDAY...West winds 10 to 20 knots backing south. A chance of rain showers. Waves calm to 2 feet. .SATURDAY...Southeast winds 10 to 20 knots veering south. A chance of showers. Waves calm to 2 feet. $$ LSZ266-140400- 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- 351 PM EDT Mon May 13 2024 .LATE THIS AFTERNOON...Northwest winds 15 to 25 knots. Waves 1 to 3 feet building to 2 to 4 feet. .TONIGHT...Northwest winds 15 to 25 knots becoming north 10 to 20 knots after midnight. Waves subsiding to 1 to 3 feet. .TUESDAY...North winds 10 to 20 knots diminishing to 5 to 15 knots in the afternoon, then backing northwest late. Waves subsiding to calm to 2 feet. .TUESDAY NIGHT...North winds 5 to 15 knots veering northeast late. Waves calm to 2 feet. .WEDNESDAY...East winds 5 to 15 knots backing north by mid afternoon. Waves calm to 2 feet. .WEDNESDAY NIGHT...North winds 5 to 15 knots veering southeast after midnight. Waves calm to 2 feet. .THURSDAY...Southeast winds 5 to 15 knots becoming east 10 to 20 knots by mid afternoon. A chance of rain showers. Waves calm to 2 feet. .THURSDAY NIGHT...Southeast winds 10 to 20 knots veering south after midnight. A chance of rain showers. Waves calm to 2 feet. .FRIDAY...West winds 10 to 20 knots backing south. A chance of rain showers. Waves calm to 2 feet. .SATURDAY...South winds 10 to 20 knots. A chance of rain showers. Waves calm to 2 feet. $$ LSZ267-140400- Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off shore to the US/Canadian border- 351 PM EDT Mon May 13 2024 .LATE THIS AFTERNOON...Northwest winds 15 to 25 knots. Waves 1 to 3 feet building to 2 to 4 feet. .TONIGHT...Northwest winds 10 to 20 knots veering north after midnight. Waves subsiding to 1 to 3 feet. .TUESDAY...North winds 10 to 20 knots backing northwest in the afternoon. Waves subsiding to calm to 2 feet. .TUESDAY NIGHT...North winds 10 to 20 knots veering northeast after midnight. Waves calm to 2 feet. .WEDNESDAY...Northeast winds 10 to 20 knots backing north by mid afternoon. Waves calm to 2 feet. .WEDNESDAY NIGHT...North winds 10 to 20 knots veering southeast after midnight. Waves calm to 2 feet. .THURSDAY...Southeast winds 10 to 20 knots. A chance of rain showers. Waves calm to 2 feet. .THURSDAY NIGHT...Southeast winds 10 to 20 knots. A chance of rain showers. Waves calm to 2 feet. .FRIDAY...West winds 10 to 20 knots backing south. A chance of rain showers. Waves calm to 2 feet. .SATURDAY...Southeast winds 10 to 20 knots veering south. A chance of rain showers. Waves calm to 2 feet. $$ LSZ261-140400- MAFOR 1321/ Superior West 11310 11200 14100 12200. Waves 1 foot or less. Superior North Central 12720 13810 12800 11700. Waves 2 feet or less. Superior South Central 11820 11720 11710 11810 14800. Waves 1 to 3 feet. Superior East 12730 11820 13810 11800 11710. Waves 1 to 4 feet. $$ GS Experimental modernized open lake forecast is available online at weather.gov/mqt/glftable Graphical marine forecasts are available online at: weather.gov/greatlakes