####018013309#### FZUS63 KMQT 291959 GLFLS Open Lake Forecast for Lake Superior National Weather Service Marquette MI 359 PM EDT Mon Apr 29 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 30.6 inch high pressure over Hudson Bay is shifting northeast into Quebec this evening. Meanwhile, a 29.7 inch low pressure over Wisconsin will track northeast, crossing western Lake Superior tonight and exiting into Ontario Tuesday morning as it weakens to 29.8 inches. During Tuesday afternoon and evening, a weak high pressure ridge of 29.9 inches will shift east across Lake Superior while a low pressure trough of 29.6 inches moves from the western Plains to Minnesota and Iowa. This trough will weaken to 29.7 inches as it sails across Lake Superior on Wednesday. As a 30.0 inch ridge then shifts east across the western Great Lakes during Wednesday night, a 29.3 inch Colorado Low will lift out over the Plains while weakening to 29.5 inches. This low will then track to the Upper Mississippi Valley on Thursday and into northwestern Ontario on Friday. As the low reaches the Hudson Bay shores Saturday afternoon at 29.6 inches, a ridge of 30.1 inches builds over Lake Huron. LSZ162-300400- Lake Superior west of a line from Saxon Harbor WI to Grand Portage MN beyond 5NM- 359 PM EDT Mon Apr 29 2024 /259 PM CDT Mon Apr 29 2024/ .LATE THIS AFTERNOON...Northeast winds 20 to 30 knots. Patchy fog. Numerous rain showers. Waves 8 to 11 feet occasionally to 14 feet subsiding to 7 to 10 feet occasionally to 13 feet. .TONIGHT...Northeast winds 15 to 25 knots becoming north 10 to 20 knots after midnight, then backing west late. Patchy fog through midnight. A chance of rain showers. Waves subsiding to 2 to 4 feet. .TUESDAY...West winds 5 to 15 knots backing southwest in the afternoon. Waves subsiding to calm to 2 feet. .TUESDAY NIGHT...East winds 5 to 15 knots increasing to 15 to 25 knots after midnight, then becoming northeast 10 to 20 knots late. A chance of rain showers through midnight, then rain showers after midnight. Waves building to 2 to 4 feet. .WEDNESDAY...West winds 15 to 25 knots increasing to 20 to 30 knots by mid afternoon. A chance of rain showers through early afternoon. Waves subsiding to 1 to 3 feet, then building to 3 to 6 feet occasionally to 8 feet. .WEDNESDAY NIGHT...West winds 10 to 20 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 drizzle through early afternoon. A chance of rain showers. Waves building to 5 to 8 feet occasionally to 10 feet. .THURSDAY NIGHT...Northeast winds 20 to 30 knots diminishing to 15 to 25 knots after midnight. A chance of rain showers. Waves subsiding to 2 to 4 feet. .FRIDAY...Southwest winds 15 to 25 knots. A chance of drizzle. A chance of rain showers. Waves subsiding to 1 to 3 feet. .SATURDAY...Southwest winds 15 to 25 knots veering west. A chance of rain showers. Waves building to 2 to 4 feet, then subsiding to calm to 2 feet. $$ LSZ263-300400- Lake Superior from Saxon Harbor WI to Upper Entrance to Portage Canal MI 5NM off shore to the US/Canadian border including Isle Royale National Park- 359 PM EDT Mon Apr 29 2024 .LATE THIS AFTERNOON...East winds 20 to 30 knots. Patchy fog. Numerous rain showers. Waves 8 to 11 feet occasionally to 14 feet subsiding to 7 to 10 feet occasionally to 13 feet. .TONIGHT...East winds 15 to 25 knots becoming west 10 to 20 knots after midnight. Patchy fog through midnight. Areas of fog after midnight. A chance of rain showers. Waves subsiding to 2 to 4 feet. .TUESDAY...West winds 10 to 20 knots diminishing to 5 to 15 knots in the afternoon, then backing southwest late. Waves subsiding to calm to 2 feet. .TUESDAY NIGHT...East winds 5 to 15 knots increasing to 10 to 20 knots after midnight. A slight chance of rain showers through midnight, then rain showers after midnight. Waves building to 2 to 4 feet. .WEDNESDAY...West winds 15 to 25 knots. A chance of rain showers through early afternoon. Waves building to 3 to 5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet. .WEDNESDAY NIGHT...West winds 5 to 15 knots veering north after midnight. Waves subsiding to calm to 2 feet. .THURSDAY...East winds 10 to 20 knots increasing to 15 to 25 knots by mid afternoon. A chance of rain showers. Waves building to 2 to 4 feet. .THURSDAY NIGHT...East winds 15 to 25 knots diminishing to 10 to 20 knots after midnight. A chance of showers and thunderstorms. Waves building to 3 to 5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet. .FRIDAY...Southwest winds 15 to 25 knots. A chance of drizzle. A chance of rain showers. Waves building to 3 to 5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet. .SATURDAY...Southwest winds 10 to 20 knots. A chance of rain showers. Waves subsiding to 1 to 3 feet. $$ LSZ264-300400- Lake Superior from Upper Entrance to Portage Canal to Manitou Island MI 5NM off shore to the US/Canadian Border- 359 PM EDT Mon Apr 29 2024 .LATE THIS AFTERNOON...East winds 20 to 30 knots. Patchy fog. Numerous rain showers. Waves 7 to 10 feet occasionally to 13 feet. .TONIGHT...East winds 15 to 25 knots diminishing to 10 to 20 knots after midnight, then veering southwest late. Patchy fog through midnight. Areas of fog after midnight. A chance of rain showers. Waves subsiding to 3 to 5 feet occasionally to 7 feet. .TUESDAY...West winds 10 to 20 knots becoming southwest 5 to 15 knots late. Areas of fog through early afternoon. A slight chance of rain showers and drizzle through early afternoon. Waves subsiding to calm to 2 feet. .TUESDAY NIGHT...Southwest winds less than 10 knots becoming east 5 to 15 knots after midnight, then becoming southeast 15 to 25 knots late. A chance of rain showers after midnight. Waves building to 2 to 4 feet. .WEDNESDAY...South winds 15 to 25 knots veering west by mid afternoon. 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 5 to 15 knots veering north after midnight. Waves subsiding to calm to 2 feet. .THURSDAY...East winds 10 to 20 knots. A chance of rain showers. Waves building to 1 to 3 feet. .THURSDAY NIGHT...East winds 15 to 25 knots. A chance of rain showers. Waves building to 2 to 4 feet. .FRIDAY...Southwest winds 15 to 25 knots. A chance of drizzle. A chance of rain showers. Waves building to 3 to 5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet. .SATURDAY...Southwest winds 10 to 20 knots. A chance of rain showers. Waves 2 to 4 feet. $$ LSZ265-300400- Lake Superior West of Line from Manitou Island to Marquette MI Beyond 5NM from shore- 359 PM EDT Mon Apr 29 2024 .LATE THIS AFTERNOON...East winds 15 to 25 knots. Patchy fog. Scattered rain showers. Waves 5 to 8 feet occasionally to 10 feet. .TONIGHT...East winds 15 to 25 knots becoming south 5 to 15 knots after midnight, then becoming west 10 to 20 knots late. Areas of fog. A chance of rain showers. Waves subsiding to 1 to 3 feet. .TUESDAY...West winds 10 to 20 knots diminishing to 5 to 15 knots late. Areas of fog through early afternoon. A slight chance of drizzle through early afternoon. Waves building to 2 to 4 feet, then subsiding to calm to 2 feet. .TUESDAY NIGHT...Southeast winds 5 to 15 knots increasing to 15 to 25 knots. Rain showers likely after midnight. Waves building to 2 to 4 feet. .WEDNESDAY...South winds 10 to 20 knots becoming west 15 to 25 knots by mid afternoon. A chance of rain showers. Waves subsiding to calm to 2 feet. .WEDNESDAY NIGHT...West winds 10 to 20 knots diminishing to 5 to 15 knots after midnight. Waves calm to 2 feet. .THURSDAY...East winds 10 to 20 knots. A chance of rain showers. Waves calm to 2 feet. .THURSDAY NIGHT...East winds 15 to 25 knots. Showers likely and a chance of thunderstorms. Waves building to 2 to 4 feet. .FRIDAY...Southwest winds 15 to 25 knots diminishing to 10 to 20 knots. A chance of drizzle. A chance of showers. Waves subsiding to calm to 2 feet. .SATURDAY...Southwest winds 15 to 25 knots diminishing to 10 to 20 knots. A chance of rain showers. Waves calm to 2 feet. $$ LSZ266-300400- 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- 359 PM EDT Mon Apr 29 2024 .LATE THIS AFTERNOON...East winds 20 to 30 knots. Patchy fog. Scattered rain showers. Waves 5 to 9 feet occasionally to 11 feet. .TONIGHT...East winds 15 to 25 knots becoming southeast 10 to 20 knots after midnight, then veering southwest late. Patchy fog through midnight. Areas of fog after midnight. A chance of rain showers. Waves subsiding to 2 to 4 feet. .TUESDAY...West winds 10 to 20 knots diminishing to 5 to 15 knots late. Patchy fog through early afternoon. A slight chance of drizzle through early afternoon. Waves subsiding to 1 to 3 feet. .TUESDAY NIGHT...East winds 5 to 15 knots veering southeast after midnight, then increasing to 10 to 20 knots late. A chance of rain showers after midnight. Waves subsiding to calm to 2 feet, then building to 2 to 4 feet. .WEDNESDAY...Southeast winds 10 to 20 knots becoming west 15 to 25 knots by mid afternoon. 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 10 to 20 knots becoming northwest 5 to 15 knots after midnight. Waves subsiding to 1 to 3 feet. .THURSDAY...East winds 10 to 20 knots. A chance of rain showers. Waves subsiding to calm to 2 feet. .THURSDAY NIGHT...East winds 15 to 25 knots. Showers likely and a chance of thunderstorms. Waves building to 2 to 4 feet. .FRIDAY...Southeast winds 15 to 25 knots veering south. A chance of drizzle. A chance of showers. Waves building to 3 to 5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet. .SATURDAY...Southwest winds 15 to 25 knots diminishing to 10 to 20 knots. A chance of rain showers. Waves subsiding to 1 to 3 feet. $$ LSZ267-300400- Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off shore to the US/Canadian border- 359 PM EDT Mon Apr 29 2024 .LATE THIS AFTERNOON...East winds 15 to 25 knots. Patchy fog. Scattered rain showers. Waves 3 to 5 feet occasionally to 7 feet. .TONIGHT...East winds 15 to 25 knots becoming southeast 10 to 20 knots after midnight, then veering south late. Patchy fog through midnight. Areas of fog after midnight. A chance of rain showers. Waves subsiding to calm to 2 feet. .TUESDAY...West winds 10 to 20 knots diminishing to 5 to 15 knots late. Patchy fog through early afternoon. A slight chance of rain showers through early afternoon. Waves building to 2 to 4 feet, then subsiding to 1 to 3 feet. .TUESDAY NIGHT...South winds 5 to 15 knots backing southeast after midnight, then increasing to 10 to 20 knots late. A chance of rain showers after midnight. Waves subsiding to calm to 2 feet, then building to 1 to 3 feet. .WEDNESDAY...Southeast winds 10 to 20 knots veering southwest by mid afternoon. A chance of rain showers. Waves subsiding to calm to 2 feet. .WEDNESDAY NIGHT...West winds 10 to 20 knots. Waves calm to 2 feet. .THURSDAY...East winds 10 to 20 knots. A chance of rain showers. Waves calm to 2 feet. .THURSDAY NIGHT...East winds 15 to 25 knots becoming southeast 20 to 30 knots after midnight. Showers likely and a chance of thunderstorms. Waves building to 1 to 3 feet. .FRIDAY...Southeast winds 15 to 25 knots veering south. A chance of drizzle. A chance of rain showers. Waves building to 2 to 4 feet, then subsiding to calm to 2 feet. .SATURDAY...South winds 15 to 25 knots diminishing to 10 to 20 knots. A chance of rain showers. Waves calm to 2 feet. $$ LSZ261-300400- MAFOR 2921/ Superior West 11146 11130 11824 11714 11610 11620 11610 11510. Waves 8 to 11 feet subsiding to 2 to 5 feet tonight and Tuesday. Superior North Central 12246 11236 11324 11524 11624 11720 11620. Waves 6 to 10 feet subsiding to 5 to 8 feet tonight. Waves 2 to 5 feet Tuesday. Superior South Central 11230 19236 11220 11314 11414 11620 11630 19634 12620. Waves 5 to 8 feet subsiding to 1 to 4 feet tonight and Tuesday. Superior East 11230 19236 11230 11336 11324 11414 11510 12620. Waves 4 to 7 feet subsiding to 1 to 4 feet tonight and Tuesday. $$ GS Experimental modernized open lake forecast is available online at weather.gov/mqt/glftable Graphical marine forecasts are available online at: weather.gov/greatlakes