National Weather Service United States Department of Commerce

 

FZUS63 KMQT 300905
GLFLS

Experimental Tabular Open Lake Forecast for Lake Superior
National Weather Service Negaunee MI
505 AM EDT Wed Sep 30 2020

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...Troughing of 29.5 inches continues over Lake Superior
today, slowing pulling away tonight as an elongated trough of
29.8 inches and associated cold front pass over the lake tonight.
By Thursday night, slight ridging of 30.2 inches moves over
western Lake Superior. High pressure of 30.3 inches then moves
over the Upper Midwest as 30.2 inch ridging remains over the lake
through Saturday evening. A developing low pressure system of 29.9
inches will develop on Sunday morning over the Central Plains,
lifting through the Lower Great Lakes Sunday night into Monday
morning.

LSZ162-301600-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
353 AM EDT Wed Sep 30 2020 /253 AM CDT Wed Sep 30 2020/

.EARLY THIS MORNING, Northwest winds 10 to 20 knots. Isolated
showers. Waves calm to 2 feet.
.TODAY, Northwest winds 15 to 25 knots. Isolated showers.
Isolated thunderstorms by mid afternoon. Waves building to 2 to
4 feet.
.TONIGHT, Northwest winds 15 to 25 knots veering north after
midnight. Isolated thunderstorms through midnight. Scattered
showers. Waves subsiding to 1 to 3 feet, then building to 3 to
5 feet occasionally to 7 feet.
.THURSDAY, North winds 15 to 25 knots diminishing to 10 to
20 knots in the afternoon. A slight chance of rain showers. Waves
building to 3 to 6 feet occasionally to 8 feet, then subsiding to
1 to 3 feet.
.THURSDAY NIGHT, North winds 10 to 20 knots. A slight chance of
rain showers after midnight. Waves subsiding to calm to 2 feet.
.FRIDAY, North winds 5 to 15 knots becoming south less than
10 knots by mid afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT, Southeast winds 5 to 15 knots. Waves calm to
2 feet.
.SATURDAY, East winds 5 to 15 knots becoming northeast 10 to
20 knots. Waves building to 1 to 3 feet.
.SUNDAY, Northeast winds 10 to 20 knots becoming southwest 5 to
15 knots. Waves subsiding to calm to 2 feet.

$$

LSZ263-301600-
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-
353 AM EDT Wed Sep 30 2020

.EARLY THIS MORNING, Northwest winds 10 to 20 knots. Isolated
showers. Waves calm to 2 feet.
.TODAY, Northwest winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon. A slight chance of waterspouts.
Isolated showers and thunderstorms. Waves building to 3 to 5 feet
occasionally to 7 feet.
.TONIGHT, Northwest winds 20 to 30 knots veering north after
midnight. A slight chance of waterspouts. Isolated thunderstorms
through midnight. Scattered rain showers. Waves building to 4 to
7 feet occasionally to 9 feet.
.THURSDAY, North winds 15 to 25 knots. A slight chance of
waterspouts through early afternoon. A slight chance of rain
showers. Waves subsiding to 2 to 4 feet.
.THURSDAY NIGHT, North winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. A slight chance of rain showers. Waves
2 to 4 feet.
.FRIDAY, North winds 10 to 20 knots diminishing to 5 to 15 knots
by mid afternoon. Waves subsiding to calm to 2 feet.
.FRIDAY NIGHT, East winds 5 to 15 knots veering southeast after
midnight. A chance of rain showers. Waves calm to 2 feet.
.SATURDAY, East winds 5 to 15 knots. Waves calm to 2 feet.
.SUNDAY, Northeast winds 10 to 20 knots veering southwest. Waves
building to 1 to 3 feet, then subsiding to calm to 2 feet.

$$

LSZ264-301600-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
353 AM EDT Wed Sep 30 2020

.EARLY THIS MORNING, Northwest winds 5 to 15 knots. Isolated
showers. Waves calm to 2 feet.
.TODAY, Northwest winds 10 to 20 knots increasing to 15 to
25 knots late. A slight chance of waterspouts. Scattered showers
and isolated thunderstorms. Waves building to 3 to 6 feet
occasionally to 8 feet.
.TONIGHT, North winds 15 to 25 knots. A slight chance of
waterspouts. Scattered showers. Waves building to 4 to 7 feet
occasionally to 9 feet.
.THURSDAY, North winds 15 to 25 knots. A slight chance of
waterspouts through early afternoon. A chance of rain showers.
Waves subsiding to 3 to 6 feet occasionally to 8 feet.
.THURSDAY NIGHT, North winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. A slight chance of rain showers. Waves
subsiding to 2 to 4 feet.
.FRIDAY, Northeast winds 5 to 15 knots. Waves subsiding to calm
to 2 feet.
.FRIDAY NIGHT, Northeast winds less than 10 knots veering
southeast after midnight. A chance of rain showers. Waves calm to
2 feet.
.SATURDAY, Southeast winds 5 to 15 knots backing east. Waves
calm to 2 feet.
.SUNDAY, Northeast winds 5 to 15 knots veering southwest. Waves
calm to 2 feet.

$$

LSZ265-301600-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
353 AM EDT Wed Sep 30 2020

.EARLY THIS MORNING, West winds 10 to 20 knots. Scattered
showers. Waves calm to 2 feet.
.TODAY, Northwest winds 15 to 25 knots increasing to 20 to
30 knots late. A slight chance of waterspouts. Scattered showers
and isolated thunderstorms. Waves building to 3 to 6 feet
occasionally to 8 feet.
.TONIGHT, Northwest winds 20 to 30 knots veering north after
midnight. A slight chance of waterspouts. Numerous showers and
isolated thunderstorms through midnight. Scattered showers after
midnight. Waves building to 5 to 8 feet occasionally to 10 feet.
.THURSDAY, North winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon. A slight chance of waterspouts through
early afternoon. A chance of showers. Waves subsiding to 3 to
6 feet occasionally to 8 feet.
.THURSDAY NIGHT, North winds 15 to 25 knots. A chance of rain
showers. Waves subsiding to 2 to 4 feet.
.FRIDAY, North winds 10 to 20 knots. A chance of rain showers.
Waves subsiding to calm to 2 feet.
.FRIDAY NIGHT, Northeast winds 5 to 15 knots veering south after
midnight. Waves calm to 2 feet.
.SATURDAY, South winds 5 to 15 knots becoming southeast 10 to
20 knots. A chance of rain showers. Waves calm to 2 feet.
.SUNDAY, Northeast winds 10 to 20 knots veering south. Waves
building to 1 to 3 feet, then subsiding to calm to 2 feet.

$$

LSZ266-301600-
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-
353 AM EDT Wed Sep 30 2020

.EARLY THIS MORNING, West winds 10 to 20 knots. Scattered
showers and isolated thunderstorms. Waves calm to 2 feet.
.TODAY, Northwest winds 10 to 20 knots increasing to 20 to
30 knots. A slight chance of waterspouts. Scattered showers and
isolated thunderstorms. Waves building to 4 to 7 feet
occasionally to 9 feet.
.TONIGHT, Northwest winds 20 to 30 knots veering north after
midnight. A slight chance of waterspouts. Isolated thunderstorms
through midnight. Scattered showers. Waves building to 6 to
9 feet occasionally to 11 feet.
.THURSDAY, North winds 20 to 30 knots. A slight chance of
waterspouts through early afternoon. A slight chance of showers.
Waves subsiding to 4 to 7 feet occasionally to 9 feet.
.THURSDAY NIGHT, North winds 15 to 25 knots. A chance of rain
showers. Waves subsiding to 3 to 5 feet occasionally to 7 feet.
.FRIDAY, North winds 10 to 20 knots diminishing to 5 to 15 knots
by mid afternoon. Waves subsiding to calm to 2 feet.
.FRIDAY NIGHT, North winds 5 to 15 knots veering east after
midnight. Waves calm to 2 feet.
.SATURDAY, Southeast winds 5 to 15 knots becoming east 10 to
20 knots. Waves calm to 2 feet.
.SUNDAY, East winds 10 to 20 knots veering south. Waves building
to 1 to 3 feet, then subsiding to calm to 2 feet.

$$

LSZ267-301600-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
353 AM EDT Wed Sep 30 2020

.EARLY THIS MORNING, West winds 10 to 20 knots. Scattered
showers. Waves calm to 2 feet.
.TODAY, Northwest winds 10 to 20 knots increasing to 20 to
30 knots. A slight chance of waterspouts. Scattered showers and
isolated thunderstorms. Waves building to 3 to 6 feet
occasionally to 8 feet.
.TONIGHT, Northwest winds 20 to 30 knots becoming north 15 to
25 knots after midnight, then increasing to 20 to 30 knots late.
A slight chance of waterspouts. Isolated thunderstorms through
midnight. Scattered showers. Waves building to 4 to 8 feet
occasionally to 10 feet.
.THURSDAY, North winds 20 to 30 knots. A slight chance of
waterspouts through early afternoon. A slight chance of showers.
Waves subsiding to 3 to 6 feet occasionally to 8 feet.
.THURSDAY NIGHT, North winds 15 to 25 knots veering northeast
after midnight. A slight chance of rain showers. Waves subsiding
to 2 to 4 feet.
.FRIDAY, North winds 10 to 20 knots. Waves subsiding to calm to
2 feet.
.FRIDAY NIGHT, North winds 5 to 15 knots. Waves calm to 2 feet.
.SATURDAY, Southeast winds 5 to 15 knots becoming east 10 to
20 knots. Waves calm to 2 feet.
.SUNDAY, East winds 10 to 20 knots. Waves calm to 2 feet.

$$

LSZ261-301600-
MAFOR 3009/
Superior West 11710 11720 13730 11720 11720 19726 11830 19836.
Waves 1 to 4 feet.

Superior North Central 11710 11720 12730 11730 19736 13830 19836.
Waves 2 to 4 feet building to 3 to 5 feet today. Waves 4 to 7
feet tonight.

Superior South Central 11610 19616 11720 19726 12730 19736 11740
19746 11746 11836 11840 19846. Waves 1 to 3 feet building to 3 to
6 feet today. Waves 5 to 8 feet tonight.

Superior East 11610 19616 11710 19716 11720 11730 11730 19736
11740 19746 11830 19836 11840 19846. Waves 1 to 3 feet building
to 2 to 4 feet today. Waves 5 to 8 feet tonight.

LSZ162-301400-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
505 AM EDT Wed Sep 30 2020 /405 AM CDT Wed Sep 30 2020/

.Today...
Weather.............Partly sunny with isolated showers.
Sfc winds...........Northwest 15 to 20 knots.
100-ft winds........Northwest 20 to 25 knots.
Sig waves...........3 to 5 feet.
Ocnl waves..........Around 6 feet.

.TONIGHT...
Weather.............Mostly cloudy with isolated showers and
                              thunderstorms, then mostly cloudy with
                              scattered showers after midnight.
Sfc winds...........Northwest 15 to 20 knots.
100-ft winds........Northwest 20 to 25 knots.
Sig waves...........3 to 5 feet.
Ocnl waves..........Around 6 feet.

.THURSDAY...
Weather.............Partly sunny.
Sfc winds...........North 15 to 20 knots.
100-ft winds........North 20 to 25 knots.
Sig waves...........4 to 6 feet.
Ocnl waves..........Around 8 feet.

.THURSDAY NIGHT...
Weather.............Mostly cloudy.
Sfc winds...........North 15 to 20 knots.
100-ft winds........North 20 to 25 knots.
Sig waves...........2 to 4 feet.
Ocnl waves..........Around 5 feet.


.FORECAST DAYS 3 THROUGH 5...

.FRIDAY...North winds 5 to 10 knots. Waves 3 to 5 feet.
.SATURDAY...Chance of showers in the morning. East winds 5 to
10 knots. Waves 2 to 4 feet.
.SUNDAY...North winds 10 to 15 knots. Waves 2 to 4 feet.

$$

LSZ263-301400-
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-
505 AM EDT Wed Sep 30 2020

.Today...
Weather.............Partly sunny with a slight chance of
                              waterspouts, isolated showers and
                              thunderstorms.
Sfc winds...........Northwest 15 to 20 knots.
100-ft winds........Northwest 20 to 25 knots.
Sig waves...........4 to 6 feet.
Ocnl waves..........Around 7 feet.

.TONIGHT...
Weather.............Mostly cloudy with scattered showers with
                              possible waterspouts and thunderstorms, then
                              mostly cloudy with scattered showers and slight
                              chance of waterspouts after midnight.
Sfc winds...........Northwest 15 to 20 knots becoming north 20 to
                              25 knots after midnight.
100-ft winds........Northwest 20 to 25 knots becoming north to 30
                              knots after midnight.
Sig waves...........5 to 7 feet.
Ocnl waves..........Around 9 feet.

.THURSDAY...
Weather.............Partly sunny in the morning.
Sfc winds...........North 20 to 25 knots.
100-ft winds........North to 30 knots.
Sig waves...........6 to 9 feet.
Ocnl waves..........Around 10 feet.

.THURSDAY NIGHT...
Weather.............Mostly cloudy.
Sfc winds...........North 15 to 20 knots.
100-ft winds........North 20 to 25 knots.
Sig waves...........3 to 5 feet.
Ocnl waves..........Around 7 feet.


.FORECAST DAYS 3 THROUGH 5...

.FRIDAY...North winds 5 to 10 knots. Waves 3 to 5 feet.
.SATURDAY...Chance of showers in the morning. East winds 5 to
10 knots. Waves 2 to 4 feet.
.SUNDAY...North winds 10 to 15 knots. Waves 2 to 4 feet.

$$

LSZ264-301400-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
505 AM EDT Wed Sep 30 2020

.Today...
Weather.............Partly sunny with a slight chance of
                              waterspouts, isolated showers and
                              thunderstorms, then partly sunny with a slight
                              chance of waterspouts and isolated showers in
                              the afternoon.
Sfc winds...........Northwest 20 to 25 knots.
100-ft winds........Northwest to 30 knots.
Sig waves...........4 to 6 feet.
Ocnl waves..........Around 7 feet.

.TONIGHT...
Weather.............Mostly cloudy with scattered showers and slight
                              chance of waterspouts.
Sfc winds...........North 20 to 25 knots.
100-ft winds........North to 30 knots.
Sig waves...........6 to 9 feet.
Ocnl waves..........Around 11 feet.

.THURSDAY...
Weather.............Mostly cloudy with scattered showers, then
                              mostly cloudy in the afternoon.
Sfc winds...........North 20 to 25 knots.
100-ft winds........North to 30 knots.
Sig waves...........6 to 9 feet.
Ocnl waves..........Around 10 feet.

.THURSDAY NIGHT...
Weather.............Mostly cloudy.
Sfc winds...........North 20 to 25 knots.
100-ft winds........North to 30 knots.
Sig waves...........5 to 7 feet.
Ocnl waves..........Around 8 feet.


.FORECAST DAYS 3 THROUGH 5...

.FRIDAY...North winds 5 to 10 knots. Waves 3 to 5 feet.
.SATURDAY...Chance of showers in the morning. East winds 5 to
10 knots. Waves 2 to 4 feet.
.SUNDAY...North winds 10 to 15 knots. Waves 2 to 4 feet.

$$

LSZ265-301400-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
505 AM EDT Wed Sep 30 2020

.Today...
Weather.............Partly sunny with scattered showers with
                              possible waterspouts and thunderstorms.
Sfc winds...........West 10 to 15 knots increasing to northwest 20
                              to 25 knots in the afternoon.
100-ft winds........West 15 to 20 knots increasing to northwest to
                              30 knots in the afternoon.
Sig waves...........2 to 4 feet building to 5 to 7 feet in the
                              afternoon.
Ocnl waves..........Around 5 feet building to around 8 feet in the
                              afternoon.

.TONIGHT...
Weather.............Numerous showers with possible waterspouts and
                              thunderstorms, then numerous showers and slight
                              chance of waterspouts after midnight.
Sfc winds...........Northwest 20 to 25 knots.
100-ft winds........Northwest to 30 knots.
Sig waves...........6 to 9 feet.
Ocnl waves..........Around 11 feet.

.THURSDAY...
Weather.............Mostly cloudy with scattered showers.
Sfc winds...........North 20 to 25 knots.
100-ft winds........North to 30 knots.
Sig waves...........6 to 9 feet.
Ocnl waves..........Around 12 feet.

.THURSDAY NIGHT...
Weather.............Mostly cloudy with chance of showers.
Sfc winds...........North 20 to 25 knots.
100-ft winds........North to 30 knots.
Sig waves...........6 to 9 feet.
Ocnl waves..........Around 10 feet.


.FORECAST DAYS 3 THROUGH 5...

.FRIDAY...North winds 5 to 10 knots. Waves 3 to 5 feet.
.SATURDAY...Chance of showers in the morning. East winds 5 to
10 knots. Waves 2 to 4 feet.
.SUNDAY...North winds 10 to 15 knots. Waves 2 to 4 feet.

$$

LSZ266-301400-
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-
505 AM EDT Wed Sep 30 2020

.Today...
Weather.............Partly sunny with scattered showers with
                              possible waterspouts and thunderstorms, then
                              partly sunny with a slight chance of
                              waterspouts, isolated showers and thunderstorms
                              in the afternoon.
Sfc winds...........West 10 to 15 knots increasing to northwest 20
                              to 25 knots in the afternoon.
100-ft winds........West 15 to 20 knots increasing to northwest to
                              30 knots in the afternoon.
Sig waves...........2 to 4 feet building to 5 to 7 feet in the
                              afternoon.
Ocnl waves..........Around 5 feet building to around 9 feet in the
                              afternoon.

.TONIGHT...
Weather.............Mostly cloudy with scattered showers with
                              possible waterspouts and thunderstorms, then
                              mostly cloudy with scattered showers and slight
                              chance of waterspouts after midnight.
Sfc winds...........Northwest 20 to 25 knots becoming north to 30
                              knots after midnight.
100-ft winds........Northwest to 30 knots becoming north gales to
                              35 knots after midnight.
Sig waves...........6 to 9 feet.
Ocnl waves..........Around 12 feet.

.THURSDAY...
Weather.............Mostly cloudy.
Sfc winds...........North 20 to 25 knots.
100-ft winds........North to 30 knots.
Sig waves...........6 to 9 feet.
Ocnl waves..........Around 12 feet.

.THURSDAY NIGHT...
Weather.............Mostly cloudy with chance of showers.
Sfc winds...........North 20 to 25 knots.
100-ft winds........North to 30 knots.
Sig waves...........6 to 9 feet.
Ocnl waves..........Around 10 feet.


.FORECAST DAYS 3 THROUGH 5...

.FRIDAY...North winds 5 to 10 knots. Waves 3 to 5 feet.
.SATURDAY...Chance of showers in the morning. East winds 5 to
10 knots. Waves 2 to 4 feet.
.SUNDAY...North winds 10 to 15 knots. Waves 2 to 4 feet.

$$

LSZ267-301400-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
505 AM EDT Wed Sep 30 2020

.Today...
Weather.............Mostly cloudy with scattered showers with
                              possible waterspouts and thunderstorms, then
                              partly sunny with a slight chance of
                              waterspouts, isolated showers and thunderstorms
                              in the afternoon.
Sfc winds...........Northwest 15 to 20 knots.
100-ft winds........Northwest 20 to 25 knots.
Sig waves...........2 to 4 feet building to 4 to 6 feet in the
                              afternoon.
Ocnl waves..........Around 7 feet in the afternoon.

.TONIGHT...
Weather.............Mostly cloudy with scattered showers with
                              possible waterspouts and thunderstorms, then
                              mostly cloudy with scattered showers and slight
                              chance of waterspouts after midnight.
Sfc winds...........Northwest 20 to 25 knots.
100-ft winds........Northwest to 30 knots.
Sig waves...........6 to 9 feet.
Ocnl waves..........Around 11 feet.

.THURSDAY...
Weather.............Mostly cloudy with scattered showers, then
                              mostly cloudy in the afternoon.
Sfc winds...........North 20 to 25 knots.
100-ft winds........North to 30 knots.
Sig waves...........6 to 9 feet.
Ocnl waves..........Around 10 feet.

.THURSDAY NIGHT...
Weather.............Mostly cloudy.
Sfc winds...........North 20 to 25 knots decreasing to 10 to 15
                              knots after midnight.
100-ft winds........North to 30 knots decreasing to 15 to 20 knots
                              after midnight.
Sig waves...........5 to 7 feet.
Ocnl waves..........Around 9 feet.


.FORECAST DAYS 3 THROUGH 5...

.FRIDAY...North winds 5 to 10 knots. Waves 3 to 5 feet.
.SATURDAY...Chance of showers in the morning. East winds 5 to
10 knots. Waves 2 to 4 feet.
.SUNDAY...North winds 10 to 15 knots. Waves 2 to 4 feet.

$$

LSZ261-301400-
MAFOR 3009/
Superior West 11710 11720 13730 11720 11720 19726 11830 19836.
Waves 1 to 3 feet building to 2 to 4 feet today. Waves 2 to 4
feet tonight.

Superior North Central 11710 11720 12730 11730 19736 13830 19836.
Waves 2 to 4 feet building to 3 to 5 feet today. Waves 4 to 7
feet tonight.

Superior South Central 11610 19616 11720 19726 12730 19736 11740
19746 11746 11836 11840 19846. Waves 1 to 3 feet building to 3 to
6 feet today. Waves 5 to 8 feet tonight.

Superior East 11610 19616 11710 19716 11720 11730 11730 19736
11740 19746 11830 19836 11840 19846. Waves 1 to 3 feet building
to 2 to 4 feet today. Waves 5 to 8 feet tonight.

$$

 

Occasional waves will only be displayed when values meet or exceed 5 feet.

 

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