Great Lakes Forecast
Issued by NWS
Issued by NWS
394 FZUS63 KMQT 170150 GLFLS Open Lake Forecast for Lake Superior National Weather Service Marquette MI 950 PM EDT Sun Jun 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...Tonight, a 29.0 inch low over northern Manitoba will pass a 29.7 inch trough over the lake. Following the trough, weak ridging of 29.9 inches will be over the lake Monday while a 29.3 inch low pressure moves off the Colorado Rockies into the Northern Plains. The low will track across northern Minnesota at 29.5 inches Tuesday, reaching James Bay Wednesday morning as it pulls a 29.8 inch trough through Lake Superior. As the low lifts northeast, high pressure to 30.3 inches builds over Lake Superior for Thursday and Friday. LSZ162-171000- Lake Superior west of a line from Saxon Harbor WI to Grand Portage MN beyond 5NM- 950 PM EDT Sun Jun 16 2024 /850 PM CDT Sun Jun 16 2024/ .REST OF TONIGHT...Southwest winds 5 to 15 knots becoming west 10 to 20 knots after midnight, then diminishing to 5 to 15 knots late. A slight chance of showers and thunderstorms by late evening. Patchy fog. Some thunderstorms may be severe. Waves calm to 2 feet. .MONDAY...West winds 5 to 15 knots backing south in the afternoon, then backing northeast late. A chance of showers through early afternoon, then showers likely and a slight chance of thunderstorms by mid afternoon. Waves calm to 2 feet. .MONDAY NIGHT...East winds 10 to 20 knots backing northeast after midnight, then veering east late. Showers likely through midnight. A chance of thunderstorms. A chance of showers after midnight. Waves building to 1 to 3 feet. .TUESDAY...East winds 10 to 20 knots becoming south 15 to 25 knots by mid afternoon. A chance of showers and thunderstorms. Waves building to 2 to 4 feet. .TUESDAY NIGHT...South winds 15 to 25 knots becoming southwest 10 to 20 knots after midnight. Showers likely through midnight. A chance of thunderstorms. A chance of showers after midnight. Waves subsiding to 1 to 3 feet. .WEDNESDAY...West winds 10 to 20 knots backing southwest by mid afternoon. Waves subsiding to calm to 2 feet. .WEDNESDAY NIGHT...West winds 5 to 15 knots veering north after midnight. Waves calm to 2 feet. .THURSDAY...Northeast winds 5 to 15 knots. Waves calm to 2 feet. .FRIDAY...Northeast winds 5 to 15 knots increasing to 10 to 20 knots. A chance of showers. A chance of thunderstorms. Showers likely. Waves calm to 2 feet. $$ LSZ263-171000- Lake Superior from Saxon Harbor WI to Upper Entrance to Portage Canal MI 5NM off shore to the US/Canadian border including Isle Royale National Park- 950 PM EDT Sun Jun 16 2024 .REST OF TONIGHT...Southwest winds 5 to 15 knots veering west after midnight. Patchy fog. A slight chance of showers and thunderstorms. Some thunderstorms may be severe by late evening. Waves 1 to 3 feet subsiding to calm to 2 feet. .MONDAY...West winds 5 to 15 knots backing southwest in the afternoon, then backing northeast late. Patchy fog through early afternoon. A chance of showers through early afternoon. A slight chance of thunderstorms. Showers likely by mid afternoon. Waves calm to 2 feet. .MONDAY NIGHT...East winds 5 to 15 knots. Showers likely through midnight. A chance of thunderstorms. A chance of showers after midnight. Waves calm to 2 feet. .TUESDAY...South winds 10 to 20 knots increasing to 15 to 25 knots by mid afternoon. A chance of showers and a slight chance of thunderstorms. Waves building to 2 to 4 feet. .TUESDAY NIGHT...South winds 10 to 20 knots veering southwest after midnight. Showers likely through midnight. A chance of thunderstorms. A chance of showers after midnight. Waves subsiding to 1 to 3 feet, then building to 2 to 4 feet. .WEDNESDAY...West winds 5 to 15 knots. A chance of showers. Waves subsiding to 1 to 3 feet. .WEDNESDAY NIGHT...West winds 5 to 15 knots veering north after midnight. A chance of showers. Waves subsiding to calm to 2 feet. .THURSDAY...Northeast winds 5 to 15 knots veering east. Waves calm to 2 feet. .FRIDAY...East winds 5 to 15 knots. A chance of showers. Showers likely. Waves calm to 2 feet. $$ LSZ264-171000- Lake Superior from Upper Entrance to Portage Canal to Manitou Island MI 5NM off shore to the US/Canadian Border- 950 PM EDT Sun Jun 16 2024 .REST OF TONIGHT...South winds 5 to 15 knots veering west late. Patchy fog. A slight chance of showers and thunderstorms. Waves 2 to 4 feet subsiding to 1 to 3 feet. .MONDAY...West winds 5 to 15 knots backing southwest in the afternoon. Patchy fog through early afternoon. A chance of showers. Waves subsiding to calm to 2 feet. .MONDAY NIGHT...East winds 5 to 15 knots veering southeast after midnight. Showers likely through midnight. A chance of thunderstorms. A chance of showers after midnight. Waves calm to 2 feet. .TUESDAY...South winds 10 to 20 knots. A slight chance of showers and thunderstorms. Waves building to 3 to 5 feet occasionally to 7 feet. .TUESDAY NIGHT...South winds 10 to 20 knots veering southwest after midnight. A chance of showers and thunderstorms. Waves subsiding to 2 to 4 feet. .WEDNESDAY...Southwest winds 5 to 15 knots veering west by mid afternoon. A chance of showers. Waves subsiding to 1 to 3 feet. .WEDNESDAY NIGHT...West winds 5 to 15 knots veering north after midnight. Waves subsiding to calm to 2 feet. .THURSDAY...North winds 5 to 15 knots becoming west less than 10 knots. Waves calm to 2 feet. .FRIDAY...East winds 5 to 15 knots. A chance of showers. Waves calm to 2 feet. $$ LSZ265-171000- Lake Superior West of Line from Manitou Island to Marquette MI Beyond 5NM from shore- 950 PM EDT Sun Jun 16 2024 .REST OF TONIGHT...South winds 10 to 20 knots veering southwest after midnight, then becoming west 5 to 15 knots late. Patchy fog. A slight chance of showers and thunderstorms. Waves 2 to 4 feet subsiding to calm to 2 feet. .MONDAY...West winds 5 to 15 knots backing south in the afternoon, then backing east late. Patchy fog through early afternoon. A chance of showers and a slight chance of thunderstorms. Waves calm to 2 feet. .MONDAY NIGHT...East winds 10 to 20 knots veering southeast late. Showers likely through midnight. A chance of thunderstorms. A chance of showers after midnight. Waves calm to 2 feet. .TUESDAY...South winds 15 to 25 knots. Waves building to 1 to 3 feet. .TUESDAY NIGHT...South winds 15 to 25 knots. A chance of showers and thunderstorms. Waves subsiding to calm to 2 feet. .WEDNESDAY...West winds 10 to 20 knots. A chance of showers and thunderstorms. Waves calm to 2 feet. .WEDNESDAY NIGHT...West winds 5 to 15 knots veering northwest after midnight. A chance of showers. Waves calm to 2 feet. .THURSDAY...North winds 5 to 15 knots backing northwest. A chance of showers. Waves calm to 2 feet. .FRIDAY...East winds 5 to 15 knots veering southeast. A chance of showers, then showers likely. Waves calm to 2 feet. $$ LSZ266-171000- 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- 950 PM EDT Sun Jun 16 2024 .REST OF TONIGHT...South winds 10 to 20 knots becoming southwest 5 to 15 knots late. A slight chance of showers and thunderstorms. Patchy fog after midnight. Waves 3 to 5 feet occasionally to 7 feet subsiding to 1 to 3 feet. .MONDAY...West winds 5 to 15 knots veering northwest in the afternoon, then veering east late. Patchy fog through early afternoon. A chance of showers. A chance of thunderstorms by mid afternoon. Waves subsiding to calm to 2 feet. .MONDAY NIGHT...East winds 5 to 15 knots becoming southeast 10 to 20 knots after midnight. Showers likely through midnight. A chance of thunderstorms. A chance of showers after midnight. Waves building to 1 to 3 feet. .TUESDAY...South winds 15 to 25 knots increasing to 20 to 30 knots by mid afternoon. A slight chance of showers and thunderstorms through early afternoon. Waves building to 3 to 5 feet occasionally to 7 feet. .TUESDAY NIGHT...South winds 15 to 25 knots. A chance of showers and thunderstorms. Waves building to 3 to 6 feet occasionally to 8 feet, then subsiding to 2 to 4 feet. .WEDNESDAY...Southwest winds 10 to 20 knots veering west by mid afternoon. A chance of showers through early afternoon. A chance of thunderstorms. Showers likely by mid afternoon. Waves subsiding to 1 to 3 feet. .WEDNESDAY NIGHT...West winds 5 to 15 knots veering northwest after midnight. A chance of showers. Waves subsiding to calm to 2 feet. .THURSDAY...North winds 5 to 15 knots backing northwest. A chance of showers. Waves calm to 2 feet. .FRIDAY...East winds 5 to 15 knots. A chance of showers. Waves calm to 2 feet. $$ LSZ267-171000- Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off shore to the US/Canadian border- 950 PM EDT Sun Jun 16 2024 .REST OF TONIGHT...South winds 15 to 25 knots diminishing to 10 to 20 knots after midnight. A chance of showers and thunderstorms. Patchy fog after midnight. Waves 2 to 4 feet subsiding to calm to 2 feet. .MONDAY...West winds 5 to 15 knots veering northeast late. Patchy fog through early afternoon. A chance of showers and thunderstorms. Waves calm to 2 feet. .MONDAY NIGHT...East winds 5 to 15 knots becoming southeast 10 to 20 knots after midnight. A chance of showers and thunderstorms. Waves calm to 2 feet. .TUESDAY...South winds 15 to 25 knots. Waves building to 2 to 4 feet. .TUESDAY NIGHT...South winds 15 to 25 knots. A chance of showers. Waves building to 3 to 5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet. .WEDNESDAY...Southwest winds 10 to 20 knots veering west by mid afternoon. A chance of showers through early afternoon. A chance of thunderstorms. Showers likely by mid afternoon. Waves subsiding to calm to 2 feet. .WEDNESDAY NIGHT...West winds 5 to 15 knots veering northwest after midnight. A chance of showers and thunderstorms. Waves calm to 2 feet. .THURSDAY...Northwest winds 5 to 15 knots. A chance of showers. Waves calm to 2 feet. .FRIDAY...Northeast winds 5 to 15 knots veering east. A chance of showers. Waves calm to 2 feet. $$ LSZ261-171000- MAFOR 1703/ Superior West 11510 11610 11600 11610 11500 11406 11106 11116. A chance of thunderstorms Monday evening. Waves 1 foot or less. Superior North Central 11410 11510 19514 11610 19614 12610 11500 11300 11216. Waves 1 to 4 feet. Superior South Central 11420 11510 11610 11600 11710 11310 12216. A chance of thunderstorms Monday evening. Waves 1 to 4 feet overnight. Waves 2 feet or less Monday and Monday evening. Superior East 12420 11510 11610 11700 11300 11100 11206. A chance of thunderstorms overnight and Monday evening. 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