FZUS63 KMQT 181414 GLFLS Open Lake Forecast for Lake Superior National Weather Service Marquette MI 1014 AM EDT Fri Jun 18 2021 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 trough across Lake Superior will deepen to 29.6 inches over northern Lake Superior today and expand across the eastern half of the Lake Friday evening. The troughing will weaken over Lake Superior Saturday morning as a weak 29.8 inch ridge shifts over the region. A 29.5 inch area of low pressure will approach from the west Sunday and move over Lake Superior Sunday night. Weak 29.8 inch ridging returns over western portions of Lake Superior Monday evening and builds to 29.9 inches as it shifts across the Lake on Tuesday. LSZ162-182215- Lake Superior west of a line from Saxon Harbor WI to Grand Portage MN beyond 5NM- 1014 AM EDT Fri Jun 18 2021 /914 AM CDT Fri Jun 18 2021/ .REST OF TODAY...Southwest winds 15 to 25 knots veering west in the afternoon. Waves 1 to 3 feet building to 2 to 4 feet, then subsiding to 1 to 3 feet. .TONIGHT...North winds 10 to 20 knots becoming east 5 to 15 knots after midnight, then backing northwest late. Waves subsiding to calm to 2 feet. .SATURDAY...North winds 5 to 15 knots backing south in the afternoon. Waves calm to 2 feet. .SATURDAY NIGHT...Southeast winds 5 to 15 knots backing east after midnight. Waves calm to 2 feet. .SUNDAY...East winds 5 to 15 knots. Showers. Waves calm to 2 feet. .SUNDAY NIGHT...Northwest winds 10 to 20 knots increasing to 15 to 25 knots after midnight. Showers likely through midnight, then a chance of showers after midnight. Waves building to 1 to 3 feet. .MONDAY...Northwest winds 15 to 25 knots becoming west 10 to 20 knots. Waves building to 2 to 4 feet, then subsiding to calm to 2 feet. .TUESDAY...West winds 10 to 20 knots diminishing to 5 to 15 knots. Waves calm to 2 feet. $$ LSZ263-182215- Lake Superior from Saxon Harbor WI to Upper Entrance to Portage Canal MI 5NM off shore to the US/Canadian border including Isle Royale National Park- 1014 AM EDT Fri Jun 18 2021 .REST OF TODAY...Southwest winds 15 to 25 knots veering west in the afternoon, then diminishing to 10 to 20 knots late. Waves 2 to 4 feet building to 3 to 5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet. .TONIGHT...Northwest winds 5 to 15 knots veering north after midnight, then backing northwest late. Waves subsiding to calm to 2 feet. .SATURDAY...North winds 5 to 15 knots backing southwest in the afternoon. Waves calm to 2 feet. .SATURDAY NIGHT...Southwest winds 5 to 15 knots backing south after midnight. Waves calm to 2 feet. .SUNDAY...South winds 5 to 15 knots backing southeast by mid afternoon. A chance of showers through early afternoon, then showers by mid afternoon. Waves calm to 2 feet. .SUNDAY NIGHT...Northwest winds 10 to 20 knots. Showers and a chance of thunderstorms through midnight, then a chance of showers after midnight. Waves building to 1 to 3 feet. .MONDAY...Northwest winds 15 to 25 knots becoming west 10 to 20 knots. Waves building to 2 to 4 feet, then subsiding to calm to 2 feet. .TUESDAY...West winds 10 to 20 knots. Waves calm to 2 feet. $$ LSZ264-182215- Lake Superior from Upper Entrance to Portage Canal to Manitou Island MI 5NM off shore to the US/Canadian Border- 1014 AM EDT Fri Jun 18 2021 .REST OF TODAY...West winds 10 to 20 knots increasing to 15 to 25 knots in the afternoon, then diminishing to 10 to 20 knots late. Isolated showers and thunderstorms by mid afternoon. Waves 2 to 4 feet building to 3 to 5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet. .TONIGHT...Northwest winds 5 to 15 knots veering north after midnight, then backing northwest late. Waves subsiding to calm to 2 feet. .SATURDAY...Northwest winds 5 to 15 knots backing west in the afternoon. Waves calm to 2 feet. .SATURDAY NIGHT...Southwest winds 5 to 15 knots becoming south less than 10 knots after midnight. Waves calm to 2 feet. .SUNDAY...Southeast winds 5 to 15 knots. Showers likely by mid afternoon. Waves calm to 2 feet. .SUNDAY NIGHT...Southeast winds 5 to 15 knots becoming northwest 10 to 20 knots after midnight. Showers through midnight, then a chance of showers after midnight. Waves building to 1 to 3 feet. .MONDAY...Northwest winds 10 to 20 knots becoming west 5 to 15 knots. Waves building to 3 to 5 feet occasionally to 7 feet, then subsiding to calm to 2 feet. .TUESDAY...West winds 5 to 15 knots. Waves calm to 2 feet. $$ LSZ265-182215- Lake Superior West of Line from Manitou Island to Marquette MI Beyond 5NM from shore- 1014 AM EDT Fri Jun 18 2021 .REST OF TODAY...West winds 15 to 25 knots veering northwest late. Waves 1 to 3 feet. .TONIGHT...Northwest winds 10 to 20 knots diminishing to 5 to 15 knots after midnight. Waves subsiding to calm to 2 feet. .SATURDAY...Northwest winds 5 to 15 knots veering north late. Waves calm to 2 feet. .SATURDAY NIGHT...South winds 5 to 15 knots. Waves calm to 2 feet. .SUNDAY...Southeast winds 5 to 15 knots increasing to 10 to 20 knots by mid afternoon. Showers likely by mid afternoon. Waves calm to 2 feet. .SUNDAY NIGHT...South winds 10 to 20 knots becoming west 15 to 25 knots after midnight. Showers. Waves building to 1 to 3 feet. .MONDAY...Northwest winds 15 to 25 knots diminishing to 10 to 20 knots. A chance of showers. Waves building to 2 to 4 feet, then subsiding to calm to 2 feet. .TUESDAY...West winds 10 to 20 knots backing southwest. Waves calm to 2 feet. $$ LSZ266-182215- 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- 1014 AM EDT Fri Jun 18 2021 .REST OF TODAY...West winds 15 to 25 knots. Waves 2 to 4 feet. .TONIGHT...Northwest winds 5 to 15 knots increasing to 10 to 20 knots after midnight. Waves subsiding to 1 to 3 feet. .SATURDAY...Northwest winds 10 to 20 knots diminishing to 5 to 15 knots late. Waves subsiding to calm to 2 feet. .SATURDAY NIGHT...West winds 5 to 15 knots backing south after midnight. Waves calm to 2 feet. .SUNDAY...Southeast winds 5 to 15 knots increasing to 10 to 20 knots by mid afternoon. Showers likely by mid afternoon. Waves calm to 2 feet. .SUNDAY NIGHT...South winds 10 to 20 knots becoming northwest 15 to 25 knots after midnight. Showers. Waves building to 1 to 3 feet. .MONDAY...Northwest winds 15 to 25 knots diminishing to 10 to 20 knots. Waves building to 3 to 6 feet occasionally to 8 feet, then subsiding to 1 to 3 feet. .TUESDAY...West winds 10 to 20 knots backing southwest. Waves subsiding to calm to 2 feet. $$ LSZ267-182215- Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off shore to the US/Canadian border- 1014 AM EDT Fri Jun 18 2021 .REST OF TODAY...Southwest winds 10 to 20 knots veering west in the afternoon. Waves calm to 2 feet building to 1 to 3 feet. .TONIGHT...Northwest winds 10 to 20 knots backing west after midnight, then veering northwest late. Waves 1 to 3 feet. .SATURDAY...West winds 10 to 20 knots. Waves subsiding to calm to 2 feet. .SATURDAY NIGHT...West winds 5 to 15 knots. Waves calm to 2 feet. .SUNDAY...Southeast winds 5 to 15 knots. A chance of showers by mid afternoon. Waves calm to 2 feet. .SUNDAY NIGHT...Southeast winds 10 to 20 knots becoming west 15 to 25 knots after midnight. Showers. Waves building to 1 to 3 feet. .MONDAY...Northwest winds 20 to 30 knots diminishing to 15 to 25 knots. A chance of rain showers. Waves building to 3 to 6 feet occasionally to 8 feet, then subsiding to 1 to 3 feet. .TUESDAY...West winds 10 to 20 knots backing southwest. Waves subsiding to calm to 2 feet. $$ LSZ261-182215- MAFOR 1815/ Superior West 11530 11630 11620 11810 11100 11200 11700 11100. Waves 2 to 4 feet this afternoon. Waves 1 to 3 feet subsiding to 1 foot or less tonight. Waves 1 foot or less Saturday morning. Superior North Central 12630 11620 14710 11710. Waves 3 to 5 feet this afternoon. Waves 2 to 4 feet tonight. Waves 1 to 2 feet Saturday morning. Superior South Central 12620 11720 12710 11700 12710. Waves 1 to 3 feet this afternoon and tonight. Waves 2 feet or less Saturday morning. Superior East 11620 12610 14710 11710. Waves 1 to 3 feet. $$ Voss Experimental modernized open lake forecast is available online at weather.gov/mqt/glftable Graphical marine forecasts are available online at: weather.gov/greatlakes