623 FZUS63 KMQT 010235 GLFLS Open Lake Forecast for Lake Superior National Weather Service Marquette MI 935 PM EST Thu Jan 31 2019 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 high pressure ridge axis of 30.5 inches from the Ohio Valley through the Upper Great Lakes will shift eastward into the northeast on Friday. A low pressure trough of 29.9 inches will sink southward across Lake Superior Friday night. High pressure ridging of 30.3 inches over northern Ontario will build into the northern Lakes through early Sunday. By late Sunday...low pressure of 29.7 inches will track from the Upper Mississippi Valley eastward across Lake Superior. A secondary low of 29.2 inches will develop in the Midwest and move across Upper Michigan Monday and Monday night. By Tuesday...high pressure ridging of 30.5 inches will build southward out of Canada across Lake Superior. LSZ162-011245- Lake Superior west of a line from Saxon Harbor WI to Grand Portage MN beyond 5NM- 935 PM EST Thu Jan 31 2019 /835 PM CST Thu Jan 31 2019/ ...HEAVY FREEZING SPRAY WARNING IN EFFECT THROUGH FRIDAY EVENING... .REST OF TONIGHT...Southwest winds 5 to 15 knots. Heavy freezing spray. Scattered snow showers. Waves calm to 2 feet building to 1 to 3 feet. .FRIDAY...Southwest winds 10 to 20 knots. Heavy freezing spray. A chance of snow showers. Waves building to 1 to 3 feet. .FRIDAY NIGHT...Southwest winds 10 to 20 knots becoming west 5 to 15 knots after midnight. Freezing spray. A chance of snow showers. Waves subsiding to calm to 2 feet. .SATURDAY...Northeast winds 5 to 15 knots becoming east 10 to 20 knots in the afternoon. Freezing spray. Waves building to 1 to 3 feet. .SATURDAY NIGHT...East winds 10 to 20 knots diminishing to 5 to 15 knots after midnight. A chance of freezing drizzle. Waves building to 2 to 4 feet, then subsiding to 1 to 3 feet. .SUNDAY...East winds 5 to 15 knots increasing to 15 to 25 knots. Snow showers, possibly mixed with rain. Waves subsiding to calm to 2 feet, then building to 1 to 3 feet. .MONDAY...Northeast winds 20 to 30 knots backing north. Heavy freezing spray. Snow showers. Waves building to 3 to 5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet. Note, wave height forecasts are for ice free areas. $$ LSZ263-011245- Lake Superior from Saxon Harbor WI to Upper Entrance to Portage Canal MI 5NM off shore to the US/Canadian border including Isle Royale National Park- 935 PM EST Thu Jan 31 2019 ...HEAVY FREEZING SPRAY WARNING IN EFFECT THROUGH FRIDAY EVENING... .REST OF TONIGHT...Southwest winds 10 to 20 knots. Heavy freezing spray. Scattered snow showers. Waves 1 to 3 feet building to 2 to 4 feet. .FRIDAY...Southwest winds 10 to 20 knots increasing to 15 to 25 knots. Heavy freezing spray. A chance of snow showers. Waves building to 2 to 4 feet. .FRIDAY NIGHT...Southwest winds 10 to 20 knots veering west after midnight. Freezing spray. Snow showers likely in the evening. A slight chance of snow showers after midnight. Waves subsiding to 1 to 3 feet. .SATURDAY...Northeast winds 5 to 15 knots becoming east 10 to 20 knots in the afternoon. Freezing spray. Waves subsiding to calm to 2 feet, then building to 1 to 3 feet. .SATURDAY NIGHT...East winds 10 to 20 knots veering southeast after midnight. Freezing spray in the evening. Waves building to 2 to 4 feet. .SUNDAY...East winds 5 to 15 knots becoming northeast 10 to 20 knots. Snow showers, possibly mixed with rain. Waves building to 3 to 5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet. .MONDAY...Northeast gales to 35 knots backing north. Heavy freezing spray. Snow showers, possibly mixed with rain. Waves building to 3 to 6 feet occasionally to 8 feet, then subsiding to 2 to 4 feet. Note, wave height forecasts are for ice free areas. $$ LSZ264-011245- Lake Superior from Upper Entrance to Portage Canal to Manitou Island MI 5NM off shore to the US/Canadian Border- 935 PM EST Thu Jan 31 2019 ...HEAVY FREEZING SPRAY WARNING IN EFFECT THROUGH FRIDAY EVENING... .REST OF TONIGHT...Northwest winds 10 to 20 knots backing west late. Heavy freezing spray. Scattered snow showers. Waves 1 to 3 feet building to 2 to 4 feet, then subsiding to 1 to 3 feet. .FRIDAY...Southwest winds 10 to 20 knots increasing to 15 to 25 knots. Heavy freezing spray. A chance of snow showers in the morning. Snow showers likely in the afternoon. Waves building to 2 to 4 feet. .FRIDAY NIGHT...Southwest winds 15 to 25 knots veering north after midnight. Freezing spray. Snow showers in the evening. A chance of snow showers after midnight. Waves subsiding to 1 to 3 feet. .SATURDAY...North winds 15 to 25 knots becoming northeast 10 to 20 knots in the afternoon. Freezing spray. Waves subsiding to calm to 2 feet. .SATURDAY NIGHT...Southeast winds 15 to 25 knots diminishing to 10 to 20 knots after midnight. Freezing spray in the evening. A chance of freezing drizzle after midnight. Waves building to 3 to 5 feet occasionally to 7 feet. .SUNDAY...Southeast winds 5 to 15 knots becoming northeast 10 to 20 knots. A chance of freezing drizzle, then a chance of snow showers, possibly mixed with rain. Waves building to 3 to 6 feet occasionally to 8 feet, then subsiding to 2 to 4 feet. .MONDAY...East gales to 35 knots backing north. Heavy freezing spray. Rain and snow showers. Waves building to 4 to 7 feet occasionally to 9 feet. Note, wave height forecasts are for ice free areas. $$ LSZ265-011245- Lake Superior West of Line from Manitou Island to Marquette MI Beyond 5NM from shore- 935 PM EST Thu Jan 31 2019 ...HEAVY FREEZING SPRAY WARNING IN EFFECT THROUGH FRIDAY EVENING... .REST OF TONIGHT...West winds 10 to 20 knots. Isolated snow showers late in the evening. Heavy freezing spray. Waves 1 to 3 feet subsiding to calm to 2 feet. .FRIDAY...West winds 5 to 15 knots backing southwest by late morning, then increasing to 10 to 20 knots by mid afternoon. Heavy freezing spray. A chance of snow showers. Waves calm to 2 feet. .FRIDAY NIGHT...Southwest winds 15 to 25 knots becoming west 10 to 20 knots after midnight. Freezing spray. Snow showers likely in the evening. A slight chance of snow showers after midnight. Waves calm to 2 feet. .SATURDAY...North winds 10 to 20 knots veering northeast in the afternoon. Waves calm to 2 feet. .SATURDAY NIGHT...Southeast winds 10 to 20 knots. Waves building to 2 to 4 feet. .SUNDAY...South winds 5 to 15 knots backing east. A chance of rain showers. Waves subsiding to calm to 2 feet. .MONDAY...Southeast winds 20 to 30 knots becoming northwest gales to 35 knots. Rain showers, possibly mixed with snow, then a chance of snow showers. Freezing spray. Waves building to 3 to 6 feet occasionally to 8 feet. Note, wave height forecasts are for ice free areas. $$ LSZ266-011245- 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- 935 PM EST Thu Jan 31 2019 ...HEAVY FREEZING SPRAY WARNING IN EFFECT THROUGH FRIDAY EVENING... .REST OF TONIGHT...West winds 10 to 20 knots. Heavy freezing spray. Numerous snow showers late in the evening. Scattered snow showers after midnight. Waves 3 to 6 feet occasionally to 8 feet subsiding to 2 to 4 feet. .FRIDAY...West winds 5 to 15 knots becoming southwest 15 to 25 knots. Freezing spray. A chance of snow showers. Waves subsiding to calm to 2 feet, then building to 1 to 3 feet. .FRIDAY NIGHT...Southwest winds 15 to 25 knots veering west after midnight. Freezing spray. Snow showers likely in the evening. A chance of snow showers after midnight. Waves building to 3 to 5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet. .SATURDAY...North winds 10 to 20 knots veering northeast in the afternoon. Freezing spray. Waves subsiding to calm to 2 feet. .SATURDAY NIGHT...Southeast winds 10 to 20 knots increasing to 15 to 25 knots after midnight. A chance of freezing drizzle after midnight. Waves building to 3 to 5 feet occasionally to 7 feet. .SUNDAY...South winds 10 to 20 knots. A chance of freezing drizzle, then a chance of rain showers, possibly mixed with snow. Waves building to 3 to 6 feet occasionally to 8 feet, then subsiding to 2 to 4 feet. .MONDAY...Southeast gales to 35 knots veering northwest. Rain showers, possibly mixed with snow, then a chance of snow showers, possibly mixed with rain. Heavy freezing spray. Waves building to 6 to 9 feet occasionally to 11 feet. $$ LSZ267-011245- Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off shore to the US/Canadian border- 935 PM EST Thu Jan 31 2019 ...HEAVY FREEZING SPRAY WARNING IN EFFECT THROUGH FRIDAY EVENING... .REST OF TONIGHT...West winds 10 to 20 knots backing southwest late. Heavy freezing spray. Periods of snow showers late in the evening. Scattered snow showers after midnight. Waves 3 to 6 feet occasionally to 8 feet subsiding to 2 to 4 feet. .FRIDAY...Southwest winds 10 to 20 knots becoming south 15 to 25 knots by mid afternoon. Heavy freezing spray. A chance of snow showers. Waves 1 to 3 feet. .FRIDAY NIGHT...Southwest winds 15 to 25 knots veering west after midnight. Freezing spray. Snow showers likely. Waves building to 3 to 5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet. .SATURDAY...North winds 10 to 20 knots veering northeast in the afternoon. Freezing spray in the morning. Waves subsiding to calm to 2 feet. .SATURDAY NIGHT...Southeast winds 10 to 20 knots increasing to 15 to 25 knots after midnight. Freezing spray. A chance of freezing drizzle and snow after midnight. Waves building to 2 to 4 feet. .SUNDAY...Southeast winds 15 to 25 knots becoming south 10 to 20 knots. Freezing spray. A chance of freezing drizzle, then a chance of rain showers, possibly mixed with snow. Waves building to 3 to 5 feet occasionally to 7 feet, then subsiding to calm to 2 feet. .MONDAY...Southeast winds 15 to 25 knots becoming northwest 20 to 30 knots. Rain showers. A chance of snow showers. Freezing spray. Waves building to 6 to 9 feet occasionally to 11 feet. Note, wave height forecasts are for ice free areas. $$ LSZ261-011245- MAFOR 0104/ Superior West...HEAVY FREEZING SPRAY WARNING IN EFFECT...12522 11522 19527 11522 13532 11520. Waves 1 to 3 feet overnight. Waves 1 to 3 feet building to 2 to 4 feet Friday. Waves 2 to 4 feet Friday evening. Superior North Central...HEAVY FREEZING SPRAY WARNING IN EFFECT... 13622 19627 13532 12537. Waves 1 to 3 feet overnight. Waves 2 to 4 feet building to 3 to 6 feet Friday. Waves 3 to 6 feet Friday evening. Superior South Central...HEAVY FREEZING SPRAY WARNING IN EFFECT... 12622 11612 12512 11520 11537 11520. Waves 1 to 3 feet overnight and Friday. Waves 2 to 4 feet Friday evening. Superior East...HEAVY FREEZING SPRAY WARNING IN EFFECT...11627 12622 19627 12522 12532 11537. Waves 3 to 5 feet overnight and Friday. Waves 3 to 6 feet building to 4 to 7 feet Friday evening. $$ JP Experimental modernized open lake forecast is available online at weather.gov/mqt/glftable Graphical marine forecasts are available online at: weather.gov/greatlakes