National Weather Service Marine Forecast FZUS63 KMQT

FZUS63 KMQT 090201
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1001 PM EDT Sat Aug 8 2020

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 29.8 inch trough will remain stationary through
tonight over the Northern Plains before moving to central
Minnesota on Sunday evening. This trough averaging 29.7 inches
will move across the Upper Great Lakes on Monday. Ridging at
around 29.9 inches will then build back into the Upper Great
Lakes on Tuesday into Thursday.

LSZ162-091015-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1001 PM EDT Sat Aug 8 2020 /901 PM CDT Sat Aug 8 2020/

REST OF TONIGHT
Southwest winds 5 to 15 knots veering west
after midnight, then veering north late. Patchy fog after
midnight. Scattered showers and thunderstorms after midnight.
Waves calm to 2 feet.

SUNDAY
East winds 5 to 15 knots increasing to 10 to 20 knots
late. Scattered showers and thunderstorms. Waves calm to 2 feet.

SUNDAY NIGHT
East winds 10 to 20 knots veering west after
midnight. A chance of showers and thunderstorms. Waves calm to
2 feet.

MONDAY
West winds 10 to 20 knots becoming southwest 15 to
25 knots by mid afternoon. Waves building to 1 to 3 feet.

MONDAY NIGHT
West winds 10 to 20 knots. Waves building to 2 to
4 feet.

TUESDAY
Southwest winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. Waves building to 3 to 5 feet
occasionally to 7 feet.

TUESDAY NIGHT
Southwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. Waves subsiding to calm to 2 feet.

WEDNESDAY
Southwest winds 5 to 15 knots backing east. Waves
calm to 2 feet.

THURSDAY
East winds 5 to 15 knots. A chance of showers and
thunderstorms. Waves calm to 2 feet.

LSZ263-091015-
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-
1001 PM EDT Sat Aug 8 2020

REST OF TONIGHT
Southwest winds 5 to 15 knots veering north
late. Patchy fog. Isolated showers and thunderstorms after
midnight. Waves calm to 2 feet.

SUNDAY
Northeast winds 5 to 15 knots veering east in the
afternoon. Patchy fog through early afternoon. Scattered showers
and thunderstorms. Waves calm to 2 feet.

SUNDAY NIGHT
East winds 10 to 20 knots veering southwest after
midnight, then veering west late. Patchy fog. Scattered showers
and thunderstorms. Waves calm to 2 feet.

MONDAY
West winds 10 to 20 knots becoming southwest 15 to
25 knots by mid afternoon. Waves building to 2 to 4 feet.

MONDAY NIGHT
West winds 10 to 20 knots. Waves 2 to 4 feet.

TUESDAY
Southwest winds 15 to 25 knots. Waves building to 4 to
7 feet occasionally to 9 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet.

TUESDAY NIGHT
Southwest winds 15 to 25 knots becoming west
10 to 20 knots after midnight. Waves subsiding to 1 to 3 feet.

WEDNESDAY
Southwest winds 5 to 15 knots backing southeast.
Waves subsiding to calm to 2 feet.

THURSDAY
East winds 5 to 15 knots becoming south 10 to
20 knots. Waves calm to 2 feet.

LSZ264-091015-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1001 PM EDT Sat Aug 8 2020

REST OF TONIGHT
South winds 5 to 15 knots veering southwest
after midnight, then becoming north less than 10 knots late.
Areas of dense fog. Isolated showers and thunderstorms after
midnight. Waves 1 to 3 feet subsiding to calm to 2 feet.

SUNDAY
Northeast winds 5 to 15 knots veering southeast in the
afternoon. Patchy fog. Scattered showers and thunderstorms. Waves
calm to 2 feet.

SUNDAY NIGHT
Southeast winds 5 to 15 knots veering southwest
after midnight. Patchy fog. A chance of showers and
thunderstorms. Waves calm to 2 feet.

MONDAY
West winds 5 to 15 knots increasing to 10 to 20 knots
by mid afternoon. Patchy fog through early afternoon. A slight
chance of showers and thunderstorms through early afternoon.
Waves building to 2 to 4 feet.

MONDAY NIGHT
West winds 10 to 20 knots. Waves 2 to 4 feet.

TUESDAY
Southwest winds 15 to 25 knots. Waves building to 4 to
7 feet occasionally to 9 feet.

TUESDAY NIGHT
West winds 15 to 25 knots diminishing to 5 to
15 knots after midnight. Waves subsiding to 1 to 3 feet.

WEDNESDAY
Southwest winds 5 to 15 knots backing southeast.
Waves subsiding to calm to 2 feet.

THURSDAY
Southeast winds 5 to 15 knots. Waves calm to 2 feet.

LSZ265-091015-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1001 PM EDT Sat Aug 8 2020

REST OF TONIGHT
South winds 5 to 15 knots veering southwest
late. Patchy fog. Waves calm to 2 feet.

SUNDAY
North winds 5 to 15 knots veering east in the
afternoon, then becoming southeast 10 to 20 knots late. Patchy
fog through early afternoon. Scattered showers and thunderstorms.
Waves calm to 2 feet.

SUNDAY NIGHT
Southeast winds 10 to 20 knots veering southwest
late. Showers and thunderstorms likely through midnight, then a
chance of showers and thunderstorms after midnight. Waves calm to
2 feet.

MONDAY
West winds 5 to 15 knots increasing to 10 to 20 knots
by mid afternoon. A slight chance of showers and thunderstorms.
Waves calm to 2 feet.

MONDAY NIGHT
West winds 10 to 20 knots. Waves calm to 2 feet.

TUESDAY
West winds 10 to 20 knots backing southwest by mid
afternoon. Waves calm to 2 feet.

TUESDAY NIGHT
Southwest winds 10 to 20 knots becoming west
5 to 15 knots after midnight. Waves calm to 2 feet.

WEDNESDAY
East winds 5 to 15 knots veering southeast. Waves
calm to 2 feet.

THURSDAY
Southeast winds 5 to 15 knots. Waves calm to 2 feet.

LSZ266-091015-
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-
1001 PM EDT Sat Aug 8 2020

REST OF TONIGHT
South winds 5 to 15 knots. Areas of dense fog.
Isolated showers and thunderstorms. Waves 2 to 4 feet subsiding
to calm to 2 feet.

SUNDAY
Southwest winds 5 to 15 knots backing southeast in the
afternoon. Patchy fog through early afternoon. Scattered showers
and thunderstorms. Waves calm to 2 feet.

SUNDAY NIGHT
Southeast winds 10 to 20 knots veering southwest
late. Patchy fog. Showers and thunderstorms likely through
midnight. A chance of showers and thunderstorms after midnight.
Waves building to 1 to 3 feet.

MONDAY
West winds 5 to 15 knots increasing to 10 to 20 knots
by mid afternoon. Patchy fog through early afternoon. A chance of
showers and thunderstorms. Waves 1 to 3 feet.

MONDAY NIGHT
West winds 10 to 20 knots. Waves building to 2 to
4 feet.

TUESDAY
West winds 10 to 20 knots backing southwest by mid
afternoon. Waves building to 3 to 6 feet occasionally to 8 feet.

TUESDAY NIGHT
Southwest winds 10 to 20 knots becoming west
5 to 15 knots after midnight. Waves subsiding to 1 to 3 feet.

WEDNESDAY
West winds 5 to 15 knots backing southeast. Waves
subsiding to calm to 2 feet.

THURSDAY
Southeast winds 5 to 15 knots. Waves calm to 2 feet.

LSZ267-091015-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1001 PM EDT Sat Aug 8 2020

REST OF TONIGHT
West winds 10 to 20 knots backing southwest
after midnight, then becoming south 5 to 15 knots late. Areas of
dense fog. Isolated showers and thunderstorms. Waves 2 to 4 feet
subsiding to calm to 2 feet.

SUNDAY
South winds 5 to 15 knots backing southeast in the
afternoon. Patchy fog through early afternoon. Isolated showers
and thunderstorms. Waves calm to 2 feet.

SUNDAY NIGHT
South winds 10 to 20 knots. A chance of showers
and thunderstorms through midnight, then showers and
thunderstorms likely after midnight. Patchy fog after midnight.
Waves building to 1 to 3 feet.

MONDAY
Southwest winds 10 to 20 knots veering west by mid
afternoon. Showers likely through early afternoon. A chance of
thunderstorms. A chance of showers by mid afternoon. Waves
subsiding to calm to 2 feet.

MONDAY NIGHT
West winds 10 to 20 knots. Waves building to 1 to
3 feet.

TUESDAY
West winds 10 to 20 knots backing southwest by mid
afternoon. Waves subsiding to calm to 2 feet.

TUESDAY NIGHT
Southwest winds 10 to 20 knots. Waves calm to
2 feet.

WEDNESDAY
West winds 5 to 15 knots backing southeast. Waves
calm to 2 feet.

THURSDAY
Southeast winds 10 to 20 knots. Waves calm to 2 feet.

LSZ261-091015-
MAFOR 0903/
Superior West 11500 11700 11800 19809 11100 19109 12200 19209
11210 19219 11210. Waves 2 feet or less.

Superior North Central 11404 11504 11704 11803 11100 19106 11300
19309 11310 19319 11310. Waves 1 to 2 feet.

Superior South Central 12400 11500 11600 11100 19109 11300 19309
11310 19319 11319. Waves 2 feet or less.

Superior East 11614 11504 11404 11403 11400 12300 11310. A chance
of showers and thunderstorms Sunday evening. Waves 1 to 3 feet.

JSS

Experimental modernized open lake forecast is available online at
weather.gov/mqt/glftable

Graphical marine forecasts are available online at:
weather.gov/greatlakes