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Marine Forecast
Expires:201711210500;;712225
FZUS63 KMQT 202055
GLFLS 

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
355 PM EST Mon Nov 20 2017

For waters beyond five 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 29.9 inch ridge of high pressure over the Lower 
Great Lakes this evening will shift over New England tonight. 
Meanwhile, a 29.2 inch low pressure over northwestern Ontario this
evening will deepen to 29.1 inches as it moves north of Lake 
Superior tonight and reaches James Bay on Tuesday afternoon. A 
30.4 inch high over the Northern Plains Tuesday evening will drift
south into the Central Plains Wednesday morning and weaken to 
30.3 inches over the Ohio Valley on Wednesday night. On Thursday 
morning, a 29.8 inch trough will settle south across the Upper 
Great Lakes. A 30.0 inch ridge will move over the Upper Great 
Lakes Thursday night and into the Lower Great Lakes on Friday 
morning. A 29.0 inch low will move to Lake Winnipeg Friday morning
and track east across northern Ontario Friday evening. This low 
will drag a 29.2 inch trough across Lake Superior on late Friday 
night. A 30.0 inch ridge then builds into the Upper Great Lakes on
Saturday.

LSZ264-210500-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
355 PM EST Mon Nov 20 2017

Gale Warning -  IN EFFECT FROM 10 PM EST THIS EVENING THROUGH
TUESDAY EVENING...

.LATE THIS AFTERNOON...South winds 15 to 25 knots. Waves 3 to
5 feet occasionally to 7 feet. 

Tonight - South winds 15 to 25 knots becoming west gales to 40 knots by midnight. Scattered snow showers, possibly mixed with rain after midnight. Waves building to 10 to 14 feet occasionally to 18 feet. .TUESDAY...Northwest gales to 45 knots diminishing to gales to 40 knots by mid afternoon. Scattered snow showers. Waves 10 to 14 feet occasionally to 18 feet. .TUESDAY NIGHT...Northwest gales to 35 knots diminishing to 15 to 25 knots by midnight. A chance of snow showers. Waves subsiding to 3 to 6 feet occasionally to 8 feet. .WEDNESDAY...West winds 15 to 25 knots. A slight chance of snow showers in the morning. Waves subsiding to 2 to 4 feet, then building to 3 to 5 feet occasionally to 7 feet. .WEDNESDAY NIGHT...West winds 15 to 25 knots. A chance of freezing rain after midnight. Waves building to 4 to 7 feet occasionally to 9 feet. .THURSDAY...Northwest winds 15 to 25 knots. Waves subsiding to 2 to 4 feet. .THURSDAY NIGHT...Northwest winds 5 to 15 knots becoming south 20 to 30 knots after midnight. Snow showers likely after midnight. Waves subsiding to calm to 2 feet, then building to 1 to 3 feet. .FRIDAY...Southwest winds 20 to 30 knots with a few gale force gusts to 35 knots becoming west late. A chance of rain showers, possibly mixed with snow. Waves building to 7 to 10 feet occasionally to 13 feet. .SATURDAY...North gales to 35 knots becoming northwest 20 to 30 knots. A chance of snow showers. Waves subsiding to 3 to 5 feet occasionally to 7 feet. $$


US Forecasts are Public Domain and derived from the
National Weather Service - (IWIN) and the National Oceanic Atmospheric Administration (NOAA)
Canadian forecasts are obtained from and are copyright of Environment Canada.

All weather information provided by MarineWaypoints.com should be used with caution.
We cannot guarantee that the data provided here is 100% accurate or up to date!


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