Great Lakes Forecast
Issued by NWS
Issued by NWS
591 FZUS63 KMQT 080147 GLFLS Open Lake Forecast for Lake Superior National Weather Service Marquette MI 947 PM EDT Tue May 7 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 29.3 inch low rotates over the Northern Plains, extending 29.6 inch troughing over Lake Superior this evening. Through Wednesday, the Northern Plains low weakens and a 29.5 inch low ejecting out of the Plains moves east along the southern end of the Great Lakes Basin. After a brief window of height rises late in the day Wednesday, another 29.5 inch low moves from the Central Plains to the Ohio River Valley early Thursday. Weak 30.0 inch ridging briefly builds in Thursday night through early Friday before another 29.7 inch low pressure trough drops through later in the day. This will be followed by weak height rises Saturday as a weak ridge briefly builds to 29.8 inches. A 29.5 inch trough moves over northern Lake Superior Sunday afternoon as a 29.2 inch low pressure skirts across the southern Hudson Bay. LSZ162-081000- Lake Superior west of a line from Saxon Harbor WI to Grand Portage MN beyond 5NM- 947 PM EDT Tue May 7 2024 /847 PM CDT Tue May 7 2024/ .REST OF TONIGHT...Northeast winds 10 to 20 knots diminishing to 5 to 15 knots late. A chance of rain showers. Waves 3 to 6 feet occasionally to 8 feet subsiding to 1 to 3 feet. .WEDNESDAY...Northeast winds 15 to 25 knots becoming east 20 to 30 knots in the afternoon, then diminishing to 15 to 25 knots late. A slight chance of rain showers through early afternoon. Waves building to 3 to 6 feet occasionally to 8 feet. .WEDNESDAY NIGHT...Northeast winds 15 to 25 knots. Waves subsiding to 2 to 4 feet, then building to 3 to 5 feet occasionally to 7 feet. .THURSDAY...Northeast winds 15 to 25 knots diminishing to 10 to 20 knots by mid afternoon. Waves subsiding to 1 to 3 feet. .THURSDAY NIGHT...West winds 5 to 15 knots increasing to 10 to 20 knots after midnight. Waves subsiding to calm to 2 feet. .FRIDAY...Southwest winds 10 to 20 knots becoming west 15 to 25 knots by mid afternoon. A chance of rain showers by mid afternoon. Waves building to 2 to 4 feet, then subsiding to 1 to 3 feet. .FRIDAY NIGHT...Northwest winds 15 to 25 knots diminishing to 10 to 20 knots after midnight. Waves subsiding to calm to 2 feet. .SATURDAY...Southwest winds 10 to 20 knots. Waves calm to 2 feet. .SUNDAY...West winds 10 to 20 knots veering northwest. A chance of rain showers. Waves calm to 2 feet. $$ LSZ263-081000- Lake Superior from Saxon Harbor WI to Upper Entrance to Portage Canal MI 5NM off shore to the US/Canadian border including Isle Royale National Park- 947 PM EDT Tue May 7 2024 .REST OF TONIGHT...East winds 5 to 15 knots backing northeast after midnight, then increasing to 10 to 20 knots late. A chance of rain showers. Waves 2 to 4 feet subsiding to 1 to 3 feet, then building to 2 to 4 feet. .WEDNESDAY...Northeast winds 20 to 30 knots diminishing to 15 to 25 knots in the afternoon, then veering east late. A slight chance of rain showers through early afternoon. Waves building to 3 to 6 feet occasionally to 8 feet. .WEDNESDAY NIGHT...Northeast winds 15 to 25 knots. Waves subsiding to 2 to 4 feet, then building to 3 to 6 feet occasionally to 8 feet. .THURSDAY...Northeast winds 15 to 25 knots becoming north 10 to 20 knots by mid afternoon. Waves subsiding to 1 to 3 feet. .THURSDAY NIGHT...West winds 5 to 15 knots. Waves subsiding to calm to 2 feet. .FRIDAY...Southwest winds 10 to 20 knots. A chance of rain showers by mid afternoon. Waves building to 2 to 4 feet, then subsiding to 1 to 3 feet. .FRIDAY NIGHT...West winds 5 to 15 knots veering northwest after midnight. Waves subsiding to calm to 2 feet. .SATURDAY...Southwest winds 5 to 15 knots. Waves calm to 2 feet. .SUNDAY...Southwest winds 5 to 15 knots veering west. Waves calm to 2 feet. $$ LSZ264-081000- Lake Superior from Upper Entrance to Portage Canal to Manitou Island MI 5NM off shore to the US/Canadian Border- 947 PM EDT Tue May 7 2024 .REST OF TONIGHT...East winds 5 to 15 knots backing northeast after midnight, then increasing to 15 to 25 knots late. A chance of rain showers. Waves 1 to 3 feet building to 3 to 5 feet occasionally to 7 feet. .WEDNESDAY...Northeast winds 20 to 30 knots diminishing to 10 to 20 knots. A slight chance of rain showers through early afternoon. Waves building to 4 to 7 feet occasionally to 9 feet, then subsiding to 2 to 4 feet. .WEDNESDAY NIGHT...Northeast winds 15 to 25 knots increasing to 20 to 30 knots after midnight, then diminishing to 15 to 25 knots late. Waves building to 3 to 6 feet occasionally to 8 feet. .THURSDAY...Northeast winds 15 to 25 knots becoming north 10 to 20 knots by mid afternoon. Waves subsiding to calm to 2 feet. .THURSDAY NIGHT...Northwest winds 5 to 15 knots backing west after midnight. Waves calm to 2 feet. .FRIDAY...Southwest winds 10 to 20 knots. Waves building to 1 to 3 feet. .FRIDAY NIGHT...Southwest winds 5 to 15 knots veering northwest after midnight. Waves subsiding to calm to 2 feet. .SATURDAY...Northwest winds 5 to 15 knots backing southwest. Waves calm to 2 feet. .SUNDAY...Southwest winds 5 to 15 knots becoming northwest 10 to 20 knots. Waves building to 1 to 3 feet. $$ LSZ265-081000- Lake Superior West of Line from Manitou Island to Marquette MI Beyond 5NM from shore- 947 PM EDT Tue May 7 2024 .REST OF TONIGHT...East winds 10 to 20 knots becoming northeast 5 to 15 knots after midnight, then becoming north 10 to 20 knots late. A chance of rain showers. Waves 1 to 3 feet subsiding to calm to 2 feet. .WEDNESDAY...North winds 10 to 20 knots. A chance of rain showers through early afternoon. Waves building to 3 to 6 feet occasionally to 8 feet, then subsiding to 2 to 4 feet. .WEDNESDAY NIGHT...North winds 10 to 20 knots veering northeast after midnight. Waves building to 3 to 5 feet occasionally to 7 feet. .THURSDAY...Northeast winds 15 to 25 knots becoming north 10 to 20 knots by mid afternoon. Waves subsiding to calm to 2 feet. .THURSDAY NIGHT...Northwest winds 10 to 20 knots backing west after midnight. Waves calm to 2 feet. .FRIDAY...West winds 10 to 20 knots backing southeast by mid afternoon. Waves calm to 2 feet. .FRIDAY NIGHT...South winds 10 to 20 knots veering northwest after midnight. Waves calm to 2 feet. .SATURDAY...Northwest winds 10 to 20 knots backing southwest. Waves calm to 2 feet. .SUNDAY...Southwest winds 10 to 20 knots veering west. A chance of rain showers. Waves calm to 2 feet. $$ LSZ266-081000- 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- 947 PM EDT Tue May 7 2024 .REST OF TONIGHT...Southeast winds 10 to 20 knots becoming northeast 5 to 15 knots after midnight, then increasing to 10 to 20 knots late. A chance of rain showers. Waves 2 to 4 feet subsiding to 1 to 3 feet, then building to 3 to 5 feet occasionally to 7 feet. .WEDNESDAY...Northeast winds 20 to 30 knots becoming north 15 to 25 knots in the afternoon, then diminishing to 10 to 20 knots late. A chance of rain showers through early afternoon. Waves building to 4 to 7 feet occasionally to 9 feet, then subsiding to 2 to 4 feet. .WEDNESDAY NIGHT...North winds 15 to 25 knots veering northeast after midnight, then diminishing to 10 to 20 knots late. Waves building to 3 to 6 feet occasionally to 8 feet. .THURSDAY...North winds 15 to 25 knots diminishing to 10 to 20 knots by mid afternoon. Waves subsiding to 1 to 3 feet. .THURSDAY NIGHT...Northwest winds 10 to 20 knots. Waves subsiding to calm to 2 feet. .FRIDAY...West winds 10 to 20 knots diminishing to 5 to 15 knots by mid afternoon. Waves calm to 2 feet. .FRIDAY NIGHT...Southeast winds 5 to 15 knots becoming northwest 10 to 20 knots after midnight. Waves calm to 2 feet. .SATURDAY...Northwest winds 10 to 20 knots backing west. Waves calm to 2 feet. .SUNDAY...Southwest winds 10 to 20 knots becoming west 15 to 25 knots. A chance of rain showers. Waves building to 1 to 3 feet. $$ LSZ267-081000- Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off shore to the US/Canadian border- 947 PM EDT Tue May 7 2024 .REST OF TONIGHT...Southeast winds 10 to 20 knots backing northeast late. A chance of rain showers by late evening, then rain showers after midnight. Waves 1 to 3 feet subsiding to calm to 2 feet, then building to 1 to 3 feet. .WEDNESDAY...Northeast winds 15 to 25 knots backing north in the afternoon, then diminishing to 10 to 20 knots late. A chance of rain showers through early afternoon. Waves building to 3 to 6 feet occasionally to 8 feet, then subsiding to 1 to 3 feet. .WEDNESDAY NIGHT...North winds 10 to 20 knots veering northeast after midnight. Waves building to 3 to 5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet. .THURSDAY...North winds 15 to 25 knots diminishing to 10 to 20 knots by mid afternoon. Waves subsiding to 1 to 3 feet. .THURSDAY NIGHT...North winds 10 to 20 knots. Waves building to 2 to 4 feet, then subsiding to 1 to 3 feet. .FRIDAY...Northwest winds 10 to 20 knots backing west by mid afternoon. Waves subsiding to calm to 2 feet. .FRIDAY NIGHT...Southeast winds 5 to 15 knots increasing to 10 to 20 knots after midnight. Waves calm to 2 feet. .SATURDAY...Northwest winds 10 to 20 knots backing west. Waves calm to 2 feet. .SUNDAY...Southwest winds 10 to 20 knots backing south. A chance of rain showers. Waves calm to 2 feet. $$ LSZ261-081000- MAFOR 0803/ Superior West 11110 13120 11130 11230 11220 11120. A chance of rain showers overnight and Wednesday morning. Waves 2 to 4 feet overnight building to 4 to 6 feet Wednesday then subsiding to 2 to 4 feet Wednesday evening. Superior North Central 11210 11120 13130 12120 11130. A chance of rain showers overnight. A chance of showers Wednesday morning. Waves 2 to 4 feet overnight. Waves 3 to 6 feet Wednesday. Waves 2 to 4 feet Wednesday evening. Superior South Central 11216 11116 11810 12820 11810 11800 11810. Waves 2 to 4 feet. Superior East 11310 11116 11126 12130 11820 11810 11820. Waves 1 to 3 feet overnight. Waves 2 to 4 feet Wednesday. Waves 2 to 3 feet Wednesday evening. $$ BW Experimental modernized open lake forecast is available online at weather.gov/mqt/glftable Graphical marine forecasts are available online at: weather.gov/greatlakes