Great Lakes Forecast
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FZUS63 KMQT 110249
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
949 PM EST Sat Feb 10 2018

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 weak low pressure system of 29.8 inches over
Manitoba will progress eastward across Ontario Sunday, and a high
pressure system of 30.9 inches will gradually build into the
Great Lakes on Monday. The high will continue drifting eastward to
New England on Tuesday before a quickly moving trough of 29.3
inches sweeps through the area on Wednesday evening. Several high
and low pressure systems may then impact the area late next week.

LSZ162-111100-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
949 PM EST Sat Feb 10 2018 /849 PM CST Sat Feb 10 2018/

.REST OF TONIGHT...Southwest winds 5 to 15 knots.
.SUNDAY...Southwest winds 10 to 20 knots increasing to 15 to
25 knots by late morning, then veering west by mid afternoon.
Patchy blowing snow in the afternoon. A slight chance of snow
showers in the afternoon.
.SUNDAY NIGHT...West winds 10 to 20 knots diminishing to 5 to
15 knots by midnight. A slight chance of snow showers in the
evening.
.MONDAY...West winds 5 to 15 knots.
.MONDAY NIGHT...West winds 5 to 15 knots backing southwest after
midnight.
.TUESDAY...Southwest winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon. A chance of snow showers. Patchy
blowing snow in the afternoon.
.TUESDAY NIGHT...Southwest winds 15 to 25 knots. Patchy blowing
snow.
.WEDNESDAY...Southwest winds 15 to 25 knots becoming northwest
10 to 20 knots.
.THURSDAY...North winds 10 to 20 knots becoming west 5 to
15 knots. A chance of snow showers.

Note, waves omitted for mostly ice covered areas.

$$

LSZ263-111100-
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-
949 PM EST Sat Feb 10 2018

.REST OF TONIGHT...Southwest winds 5 to 15 knots.
.SUNDAY...Southwest winds 10 to 20 knots becoming west 15 to
25 knots by mid afternoon. Patchy blowing snow in the afternoon.
A slight chance of snow showers in the afternoon.
.SUNDAY NIGHT...West winds 15 to 25 knots diminishing to 5 to
15 knots. A chance of snow showers in the evening.
.MONDAY...West winds 5 to 15 knots.
.MONDAY NIGHT...West winds 5 to 15 knots backing southwest after
midnight.
.TUESDAY...Southwest winds 10 to 20 knots increasing to 20 to
30 knots in the afternoon. A chance of snow showers. Patchy
blowing snow in the afternoon.
.TUESDAY NIGHT...Southwest winds 20 to 30 knots. Patchy blowing
snow.
.WEDNESDAY...Southwest winds 15 to 25 knots becoming west 20 to
30 knots. Patchy blowing snow. A chance of snow showers.
.THURSDAY...North winds 20 to 30 knots becoming west 5 to
15 knots. Patchy blowing snow. A chance of snow showers.

Note, waves omitted for mostly ice covered areas.

$$

LSZ264-111100-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
949 PM EST Sat Feb 10 2018

.REST OF TONIGHT...Southwest winds 5 to 15 knots increasing to
10 to 20 knots by midnight, then diminishing to 5 to 15 knots
late. A slight chance of snow showers. Waves calm to 2 feet.
.SUNDAY...Southwest winds 10 to 20 knots becoming west 20 to
30 knots by mid afternoon. Patchy blowing snow in the afternoon.
A slight chance of snow showers in the afternoon. Waves calm to
2 feet.
.SUNDAY NIGHT...West winds 20 to 30 knots diminishing to 10 to
20 knots. Patchy blowing snow in the evening. A chance of snow
showers. Waves calm to 2 feet.
.MONDAY...West winds 5 to 15 knots. A slight chance of snow
showers in the morning. Waves calm to 2 feet.
.MONDAY NIGHT...West winds 5 to 15 knots backing southwest after
midnight. Waves calm to 2 feet.
.TUESDAY...Southwest winds 10 to 20 knots increasing to 20 to
30 knots in the afternoon. Patchy blowing snow. A chance of snow
showers. Waves calm to 2 feet.
.TUESDAY NIGHT...Southwest winds 20 to 30 knots increasing to
gales to 35 knots after midnight. A chance of snow showers in the
evening. Patchy blowing snow. Waves calm to 2 feet.
.WEDNESDAY...Southwest winds 15 to 25 knots becoming west 20 to
30 knots. Patchy blowing snow. A chance of snow showers. Waves
calm to 2 feet.
.THURSDAY...North winds 20 to 30 knots becoming west 5 to
15 knots. Patchy blowing snow. A chance of snow showers. Waves
calm to 2 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ265-111100-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
949 PM EST Sat Feb 10 2018

.REST OF TONIGHT...South winds 5 to 15 knots veering southwest
late.
.SUNDAY...Southwest winds 5 to 15 knots veering west by late
morning, then increasing to 10 to 20 knots by mid afternoon. A
chance of snow showers in the afternoon.
.SUNDAY NIGHT...West winds 15 to 25 knots diminishing to 10 to
20 knots late. Patchy blowing snow in the evening. A chance of
snow showers.
.MONDAY...West winds 10 to 20 knots.
.MONDAY NIGHT...West winds 5 to 15 knots backing southwest after
midnight.
.TUESDAY...Southwest winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon.
.TUESDAY NIGHT...Southwest winds 15 to 25 knots.
.WEDNESDAY...Southwest winds 15 to 25 knots becoming northwest
20 to 30 knots. Patchy blowing snow. Snow showers likely.
.THURSDAY...North winds 20 to 30 knots becoming west 10 to
20 knots. Patchy blowing snow. A chance of snow showers.

Note, waves omitted for mostly ice covered areas.

$$

LSZ266-111100-
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-
949 PM EST Sat Feb 10 2018

.REST OF TONIGHT...Southwest winds 5 to 15 knots becoming south
10 to 20 knots by midnight. A slight chance of snow showers.
Waves calm to 2 feet building to 2 to 4 feet.
.SUNDAY...Southwest winds 10 to 20 knots becoming west 15 to
25 knots by mid afternoon. A chance of snow showers in the
afternoon. Waves subsiding to 1 to 3 feet, then building to 3 to
5 feet occasionally to 7 feet.
.SUNDAY NIGHT...West winds 20 to 30 knots veering northwest by
midnight, then diminishing to 15 to 25 knots late. Heavy freezing
spray. A chance of snow showers. Waves building to 5 to 8 feet
occasionally to 10 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet.
.MONDAY...Northwest winds 10 to 20 knots backing west in the
afternoon. Freezing spray in the morning. A slight chance of snow
showers. Waves subsiding to 2 to 4 feet.
.MONDAY NIGHT...West winds 10 to 20 knots becoming southwest 5 to
15 knots after midnight. Waves 2 to 4 feet.
.TUESDAY...Southwest winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon. A chance of snow showers. Waves
building to 4 to 7 feet occasionally to 9 feet.
.TUESDAY NIGHT...Southwest winds 20 to 30 knots. A chance of snow
showers. Waves subsiding to 3 to 5 feet occasionally to 7 feet.
.WEDNESDAY...Southwest winds 15 to 25 knots becoming west 20 to
30 knots. Snow showers likely. Waves subsiding to 2 to 4 feet,
then building to 3 to 6 feet occasionally to 8 feet.
.THURSDAY...North winds 20 to 30 knots becoming west 15 to
25 knots. Heavy freezing spray. A chance of snow showers. Waves
building to 5 to 8 feet occasionally to 10 feet, then subsiding
to 1 to 3 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ267-111100-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
949 PM EST Sat Feb 10 2018

.REST OF TONIGHT...Southwest winds 5 to 15 knots backing south by
midnight, then increasing to 10 to 20 knots late. A slight chance
of snow showers late in the evening. Waves calm to 2 feet
building to 1 to 3 feet.
.SUNDAY...South winds 10 to 20 knots veering southwest by late
morning, then becoming west 15 to 25 knots by mid afternoon. A
chance of snow showers in the afternoon. Waves building to 2 to
4 feet, then subsiding to 1 to 3 feet.
.SUNDAY NIGHT...West winds 20 to 30 knots veering northwest by
midnight, then diminishing to 15 to 25 knots late. Heavy freezing
spray. A chance of snow showers. Waves building to 6 to 9 feet
occasionally to 11 feet, then subsiding to 4 to 7 feet
occasionally to 9 feet.
.MONDAY...Northwest winds 10 to 20 knots backing west in the
afternoon. Freezing spray in the morning. A chance of snow
showers. Waves subsiding to 2 to 4 feet.
.MONDAY NIGHT...West winds 10 to 20 knots backing southwest after
midnight. A slight chance of snow showers in the evening. Waves
2 to 4 feet.
.TUESDAY...Southwest winds 15 to 25 knots becoming south 20 to
30 knots in the afternoon. Snow showers likely in the afternoon.
Waves building to 4 to 7 feet occasionally to 9 feet.
.TUESDAY NIGHT...Southwest winds 20 to 30 knots diminishing to
15 to 25 knots after midnight. A chance of snow showers. Waves
subsiding to 3 to 5 feet occasionally to 7 feet.
.WEDNESDAY...Southwest winds 15 to 25 knots becoming west 20 to
30 knots. Snow showers likely. Waves subsiding to 2 to 4 feet,
then building to 3 to 6 feet occasionally to 8 feet.
.THURSDAY...North winds 15 to 25 knots becoming northwest 10 to
20 knots. Heavy freezing spray. A chance of snow showers. Waves
building to 4 to 7 feet occasionally to 9 feet, then subsiding to
1 to 3 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ261-111100-
MAFOR 1104/
Superior West 13510 11520 11530 13630. Chance of snow showers
Sunday evening. Waves omitted for mostly ice covered areas.

Superior North Central 13510 11520 11530 13640. Chance of snow
showers late Sunday. Chance of snow showers Sunday evening.

Superior South Central 12410 12500 11610 11620 11630 11640.
Chance of snow showers Sunday evening. Waves omitted for mostly
ice covered areas.

Superior East 11520 12420 12520 11630 11637 11647. Freezing spray
Sunday evening. Waves 1 to 4 feet overnight and Sunday. Waves 3
to 6 feet building to 5 to 8 feet Sunday evening.

$$

KCW

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

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



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