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Mt. Washington, NH
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FZUS63 KMQT 250312
Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1012 PM EST Fri Nov 24 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 29.1 inch low over James Bay tonight is dragging a
trough averaging 29.3 inches across eastern Lake Superior late
this evening, reaching central Quebec on Saturday. The region
will then be dominated by a strengthening high pressure ridge of
30.1 inches passing through the central United States Saturday
through Sunday morning. A weak 29.9 inch trough will briefly
influence Lake Superior Sunday, followed by another 30.1 inch
ridge overnight. A developing low pressure system of 29.2 inches
will then push through Manitoba and Ontario, reaching the Upper
Great Lakes on late Monday night and into Tuesday. A high pressure
ridge of 30.2 inches returns over the region on Wednesday.
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-
1012 PM EST Fri Nov 24 2017
.REST OF TONIGHT...Northwest winds 20 to 30 knots with a few gale
force gusts to 35 knots. Isolated rain showers. Isolated snow
showers after midnight. Waves 3 to 6 feet occasionally to 8 feet
building to 8 to 11 feet occasionally to 14 feet.
.SATURDAY...Northwest winds 20 to 30 knots with a few gale force
gusts to 35 knots. Scattered snow showers. Waves subsiding to 6
to 9 feet occasionally to 11 feet.
.SATURDAY NIGHT...Northwest winds 20 to 30 knots diminishing to
15 to 25 knots by midnight, then backing west late. A slight
chance of snow showers. Waves subsiding to 2 to 4 feet.
.SUNDAY...Southwest winds 20 to 30 knots veering northwest in the
afternoon. A slight chance of snow showers in the morning. A
slight chance of rain showers. Waves building to 6 to 9 feet
occasionally to 11 feet.
.SUNDAY NIGHT...Northwest winds 15 to 25 knots becoming north
10 to 20 knots after midnight. Waves subsiding to 2 to 4 feet.
.MONDAY...Southeast winds 5 to 15 knots becoming south 15 to
25 knots in the afternoon. Waves subsiding to calm to 2 feet,
then building to 3 to 6 feet occasionally to 8 feet.
.MONDAY NIGHT...South gales to 35 knots becoming southwest 20 to
30 knots after midnight. A chance of rain showers. Waves building
to 5 to 9 feet occasionally to 11 feet.
.TUESDAY...West gales to 35 knots veering northwest. Waves
subsiding to 4 to 7 feet occasionally to 9 feet, then building to
9 to 12 feet occasionally to 15 feet.
.WEDNESDAY...South winds 10 to 20 knots increasing to 15 to
25 knots. Waves subsiding to calm to 2 feet, then building to
2 to 4 feet.