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National Weather Service Marine Forecast FZUS63 KMQT

FZUS63 KMQT 160133
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
933 PM EDT Sun Jul 15 2018

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 trough of low pressure will cross the Upper Great
Lakes late tonight into Monday morning at 29.8 inches. After the
trough exits on Monday afternoon, a 30.2 inch ridge of high
pressure will begin to build into the Great Lakes, reaching Lake
Superior Tuesday morning and persisting through Wednesday. On
Thursday, the high will move east to the Lower Great Lakes and
then off the Atlantic coast...as low pressure of 29.7 inches
begins to organize in the Plains that will reach the Great Lakes
on Friday afternoon.

LSZ162-160945-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
933 PM EDT Sun Jul 15 2018 /833 PM CDT Sun Jul 15 2018/

REST OF TONIGHT
West winds 5 to 15 knots. Patchy fog by late
evening. Waves calm to 2 feet building to 1 to 3 feet.

MONDAY
West winds 5 to 15 knots. Waves building to 2 to
4 feet, then subsiding to 1 to 3 feet.

MONDAY NIGHT
Northwest winds 5 to 15 knots veering north late.
Waves subsiding to calm to 2 feet.

TUESDAY
North winds less than 10 knots veering south by mid
afternoon. Waves calm to 2 feet.

TUESDAY NIGHT
South winds less than 10 knots veering southwest
after midnight. Waves calm to 2 feet.

WEDNESDAY
Southwest winds 5 to 15 knots backing south by mid
afternoon. Waves calm to 2 feet.

WEDNESDAY NIGHT
South winds less than 10 knots. Waves calm to
2 feet.

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

FRIDAY
Northeast winds 5 to 15 knots. A chance of showers.
Waves building to 2 to 4 feet, then subsiding to calm to 2 feet.



LSZ263-160945-
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-
933 PM EDT Sun Jul 15 2018

REST OF TONIGHT
West winds 5 to 15 knots. Patchy fog. Waves
calm to 2 feet building to 1 to 3 feet.

MONDAY
West winds 10 to 20 knots diminishing to 5 to 15 knots
late. Waves building to 3 to 5 feet occasionally to 7 feet, then
subsiding to 2 to 4 feet.

MONDAY NIGHT
Northwest winds 5 to 15 knots veering north late.
Waves subsiding to calm to 2 feet.

TUESDAY
North winds 5 to 15 knots backing southwest by mid
afternoon. Waves calm to 2 feet.

TUESDAY NIGHT
Southwest winds 5 to 15 knots. Waves calm to
2 feet.

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

WEDNESDAY NIGHT
South winds 5 to 15 knots. Waves calm to
2 feet.

THURSDAY
Southwest winds 5 to 15 knots backing east. A chance
of showers. Waves building to 1 to 3 feet.

FRIDAY
Northeast winds 5 to 15 knots. A chance of showers.
Waves building to 2 to 4 feet, then subsiding to 1 to 3 feet.



LSZ264-160945-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
933 PM EDT Sun Jul 15 2018

REST OF TONIGHT
Southwest winds 10 to 20 knots veering west
after midnight. A slight chance of showers and thunderstorms by
late evening. Patchy fog. Waves 1 to 3 feet subsiding to calm to
2 feet, then building to 1 to 3 feet.

MONDAY
West winds 10 to 20 knots increasing to 15 to 25 knots
in the afternoon, then diminishing to 10 to 20 knots late. Waves
building to 3 to 5 feet occasionally to 7 feet, then subsiding to
2 to 4 feet.

MONDAY NIGHT
Northwest winds 10 to 20 knots veering north
late. Waves subsiding to 1 to 3 feet.

TUESDAY
North winds 5 to 15 knots backing west by mid
afternoon. Waves subsiding to calm to 2 feet.

TUESDAY NIGHT
Southwest winds 5 to 15 knots. Waves calm to
2 feet.

WEDNESDAY
Southwest winds 10 to 20 knots diminishing to 5 to
15 knots by mid afternoon. Waves calm to 2 feet.

WEDNESDAY NIGHT
South winds 5 to 15 knots increasing to 10 to
20 knots after midnight. Waves calm to 2 feet.

THURSDAY
Southeast winds 5 to 15 knots increasing to 10 to
20 knots. Waves building to 1 to 3 feet.

FRIDAY
East winds 10 to 20 knots. A chance of showers. Waves
1 to 3 feet.



LSZ265-160945-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
933 PM EDT Sun Jul 15 2018

REST OF TONIGHT
South winds 5 to 15 knots veering west after
midnight, then increasing to 10 to 20 knots late. A slight chance
of showers and thunderstorms by late evening. Waves calm to
2 feet building to 1 to 3 feet.

MONDAY
West winds 10 to 20 knots increasing to 15 to 25 knots
late. Waves building to 1 to 3 feet.

MONDAY NIGHT
West winds 10 to 20 knots veering northwest after
midnight. Waves subsiding to calm to 2 feet.

TUESDAY
North winds 5 to 15 knots backing northwest by mid
afternoon. Waves building to 1 to 3 feet, then subsiding to calm
to 2 feet.

TUESDAY NIGHT
West winds 5 to 15 knots backing southwest after
midnight. Waves calm to 2 feet.

WEDNESDAY
Southwest winds 5 to 15 knots backing southeast by
mid afternoon. Waves calm to 2 feet.

WEDNESDAY NIGHT
South winds 10 to 20 knots veering southwest
after midnight. Waves calm to 2 feet.

THURSDAY
Southeast winds 10 to 20 knots. Waves building to
1 to 3 feet.

FRIDAY
East winds 10 to 20 knots diminishing to 5 to 15 knots.
A chance of showers. Waves subsiding to calm to 2 feet.



LSZ266-160945-
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-
933 PM EDT Sun Jul 15 2018

REST OF TONIGHT
South winds 5 to 15 knots veering west after
midnight, then increasing to 10 to 20 knots late. Patchy fog. A
slight chance of showers and thunderstorms. Waves calm to 2 feet
building to 1 to 3 feet.

MONDAY
West winds 10 to 20 knots increasing to 15 to 25 knots
late. Waves building to 3 to 5 feet occasionally to 7 feet, then
subsiding to 2 to 4 feet.

MONDAY NIGHT
Northwest winds 10 to 20 knots. Waves subsiding
to 1 to 3 feet.

TUESDAY
Northwest winds 10 to 20 knots. Waves 1 to 3 feet.

TUESDAY NIGHT
West winds 5 to 15 knots backing southwest after
midnight. Waves subsiding to calm to 2 feet.

WEDNESDAY
Southwest winds 5 to 15 knots backing south by mid
afternoon. Waves calm to 2 feet.

WEDNESDAY NIGHT
South winds 10 to 20 knots. Waves building to
1 to 3 feet, then subsiding to calm to 2 feet.

THURSDAY
Southeast winds 10 to 20 knots. Waves building to
1 to 3 feet.

FRIDAY
East winds 10 to 20 knots. A chance of showers. Waves
1 to 3 feet.



LSZ267-160945-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
933 PM EDT Sun Jul 15 2018

REST OF TONIGHT
South winds 10 to 20 knots veering west late.
Patchy fog by late evening. A chance of showers and
thunderstorms. Waves calm to 2 feet.

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

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

TUESDAY
Northwest winds 10 to 20 knots. Waves 1 to 3 feet.

TUESDAY NIGHT
Northwest winds 5 to 15 knots backing west after
midnight. Waves subsiding to calm to 2 feet.

WEDNESDAY
Southwest winds 5 to 15 knots backing south by mid
afternoon. Waves calm to 2 feet.

WEDNESDAY NIGHT
South winds 5 to 15 knots increasing to 10 to
20 knots after midnight. Waves calm to 2 feet.

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

FRIDAY
Southeast winds 10 to 20 knots backing east. A chance
of showers. Waves building to 1 to 3 feet, then subsiding to calm
to 2 feet.


LSZ261-160945-
MAFOR 1603/
Superior West 13610 13620 12710. Patchy fog late this evening.
Waves 1 to 4 feet.

Superior North Central 13610 14620 11710. Patchy fog overnight.
Waves 1 to 3 feet overnight, building to 3 to 5 feet Monday.
Waves 2 to 4 feet Monday evening.

Superior South Central 11500 14610 11620 11720 11710. Chance of
showers late this evening. Waves 3 feet or less.

Superior East 11410 14610 12620 11710. Patchy fog and a chance of
showers after midnight. Waves 1 to 2 feet overnight. Waves 2 to 4
feet Monday and Monday 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