Great Lakes Forecast
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FZUS63 KMQT 241946
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
346 PM EDT Sat Jun 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 29.2 inch low pressure over the Canadian Maritimes
will slide eastward, leaving a 29.9 inch trough over the Upper Great
Lakes through Monday. The trough will dissipate as a 30.2 inch high
pressure over the Northern Plains Monday morning moves over the Ohio
Valley Tuesday and off the East coast on Wednesday. A 29.4 inch low
pressure over southeast Manitoba Wednesday morning will reach James
Bay Thursday, with a 29.8 inch trough extending back to a 29.5 inch
low pressure over the central plains.

LSZ162-250400-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
346 PM EDT Sat Jun 24 2017 /246 PM CDT Sat Jun 24 2017/

.LATE THIS AFTERNOON...West winds 5 to 15 knots. Scattered
showers. Waves calm to 2 feet.
.TONIGHT...West winds 5 to 15 knots veering north late. Isolated
rain showers. Patchy fog after midnight. Waves calm to 2 feet.
.SUNDAY...North winds 5 to 15 knots. Patchy fog. Scattered rain
showers. Waves calm to 2 feet.
.SUNDAY NIGHT...Northwest winds 5 to 15 knots increasing to 10 to
20 knots after midnight. Scattered rain showers. Waves calm to
2 feet.
.MONDAY...West winds 5 to 15 knots backing southwest by mid
afternoon. Isolated rain showers by mid afternoon. Waves calm to
2 feet.
.MONDAY NIGHT...West winds 10 to 20 knots. Waves calm to 2 feet.
.TUESDAY...Southwest winds 10 to 20 knots. Waves calm to 2 feet.
.TUESDAY NIGHT...South winds 10 to 20 knots. A chance of showers.
Waves calm to 2 feet.
.WEDNESDAY...Southeast winds 10 to 20 knots backing north.
Showers likely. A chance of showers. Waves building to 1 to
3 feet, then subsiding to calm to 2 feet.
.THURSDAY...North winds 10 to 20 knots veering northeast. Waves
calm to 2 feet.

$$

LSZ263-250400-
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-
346 PM EDT Sat Jun 24 2017

.LATE THIS AFTERNOON...West winds 5 to 15 knots. Patchy fog.
Scattered rain showers. Waves calm to 2 feet.
.TONIGHT...West winds 5 to 15 knots diminishing to less than
10 knots after midnight, then becoming north 5 to 15 knots late.
Isolated rain showers through midnight. Patchy fog. Waves calm to
2 feet.
.SUNDAY...North winds 5 to 15 knots diminishing to less than
10 knots in the afternoon. Patchy fog. Scattered rain showers.
Waves calm to 2 feet.
.SUNDAY NIGHT...Northwest winds 5 to 15 knots. Scattered rain
showers. Waves calm to 2 feet.
.MONDAY...West winds 5 to 15 knots backing southwest by mid
afternoon. Isolated rain showers by mid afternoon. Waves calm to
2 feet.
.MONDAY NIGHT...West winds 5 to 15 knots. Waves calm to 2 feet.
.TUESDAY...West winds 5 to 15 knots backing southwest by mid
afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...Southwest winds 5 to 15 knots backing south
after midnight. Waves calm to 2 feet.
.WEDNESDAY...Southeast winds 10 to 20 knots backing east.
Showers. A chance of showers. Waves building to 2 to 4 feet.
.THURSDAY...North winds 10 to 20 knots becoming northeast 5 to
15 knots. A chance of showers. Waves subsiding to calm to 2 feet.

$$

LSZ264-250400-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
346 PM EDT Sat Jun 24 2017

.LATE THIS AFTERNOON...West winds 5 to 15 knots. Patchy fog.
Isolated rain showers. Waves calm to 2 feet.
.TONIGHT...West winds 5 to 15 knots veering north late. Isolated
rain showers through midnight. Patchy fog. Waves calm to 2 feet.
.SUNDAY...North winds 5 to 15 knots backing northwest late.
Patchy fog through early afternoon. Isolated rain showers by mid
afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...Northwest winds 5 to 15 knots. Scattered rain
showers. Waves calm to 2 feet.
.MONDAY...West winds 5 to 15 knots backing southwest by mid
afternoon. Isolated rain showers through early afternoon. Waves
building to 1 to 3 feet.
.MONDAY NIGHT...West winds 5 to 15 knots. Waves subsiding to calm
to 2 feet.
.TUESDAY...West winds 5 to 15 knots becoming southwest 10 to
20 knots by mid afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...Southwest winds 5 to 15 knots. Waves calm to
2 feet.
.WEDNESDAY...Southeast winds 10 to 20 knots becoming east 15 to
25 knots. Rain showers likely. Waves building to 3 to 5 feet
occasionally to 7 feet.
.THURSDAY...Northeast winds 10 to 20 knots backing north. A
chance of rain showers. Waves subsiding to calm to 2 feet.

$$

LSZ265-250400-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
346 PM EDT Sat Jun 24 2017

.LATE THIS AFTERNOON...West winds 5 to 15 knots. Patchy fog.
Isolated showers. Waves calm to 2 feet.
.TONIGHT...West winds 5 to 15 knots. Isolated rain showers
through midnight. Patchy fog. Waves calm to 2 feet.
.SUNDAY...Northwest winds 5 to 15 knots veering north in the
afternoon. Patchy fog through early afternoon. Scattered rain
showers by mid afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...Northwest winds 10 to 20 knots. Scattered rain
showers. Waves calm to 2 feet.
.MONDAY...Northwest winds 10 to 20 knots backing west by mid
afternoon. Isolated rain showers through early afternoon. 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. Waves calm to 2 feet.
.TUESDAY NIGHT...Southwest winds 10 to 20 knots. Waves calm to
2 feet.
.WEDNESDAY...Southeast winds 10 to 20 knots becoming south 15 to
25 knots. A chance of showers. Showers likely. Waves building to
2 to 4 feet.
.THURSDAY...Northwest winds 10 to 20 knots veering north. Waves
subsiding to calm to 2 feet.

$$

LSZ266-250400-
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-
346 PM EDT Sat Jun 24 2017

.LATE THIS AFTERNOON...Northwest winds 5 to 15 knots. Patchy fog.
Isolated rain showers. Waves calm to 2 feet.
.TONIGHT...Northwest winds 5 to 15 knots. Patchy fog. Isolated
rain showers. Waves calm to 2 feet.
.SUNDAY...North winds 5 to 15 knots increasing to 10 to 20 knots
in the afternoon, then backing northwest late. Patchy fog.
Isolated rain showers by mid afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...Northwest winds 5 to 15 knots increasing to 10 to
20 knots after midnight, then veering north late. Scattered rain
showers. Waves calm to 2 feet.
.MONDAY...Northwest winds 10 to 20 knots backing west by mid
afternoon. Scattered rain showers through early afternoon. Waves
building to 1 to 3 feet.
.MONDAY NIGHT...West winds 10 to 20 knots. Waves subsiding to
calm to 2 feet.
.TUESDAY...West winds 10 to 20 knots. Waves building to 1 to
3 feet, then subsiding to calm to 2 feet.
.TUESDAY NIGHT...Southwest winds 10 to 20 knots backing south
after midnight. Waves calm to 2 feet.
.WEDNESDAY...South winds 10 to 20 knots becoming southeast 15 to
25 knots. Rain showers likely. Waves building to 3 to 5 feet
occasionally to 7 feet.
.THURSDAY...North winds 10 to 20 knots. A chance of rain showers.
Waves subsiding to calm to 2 feet.

$$

LSZ267-250400-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
346 PM EDT Sat Jun 24 2017

.LATE THIS AFTERNOON...Northwest winds 10 to 20 knots. Patchy
fog. Waves calm to 2 feet.
.TONIGHT...Northwest winds 5 to 15 knots increasing to 10 to
20 knots after midnight, then diminishing to 5 to 15 knots late.
Patchy fog. Scattered rain showers. Waves calm to 2 feet.
.SUNDAY...Northwest winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon. Isolated rain showers through early
afternoon. Patchy fog. Waves calm to 2 feet.
.SUNDAY NIGHT...Northwest winds 5 to 15 knots veering north late.
Scattered rain showers. Waves calm to 2 feet.
.MONDAY...North winds 5 to 15 knots becoming northwest 10 to
20 knots by mid afternoon. Scattered rain showers. Waves calm to
2 feet.
.MONDAY NIGHT...West winds 5 to 15 knots increasing to 10 to
20 knots after midnight. Waves calm to 2 feet.
.TUESDAY...West winds 10 to 20 knots. Waves calm to 2 feet.
.TUESDAY NIGHT...Southwest winds 10 to 20 knots. Waves calm to
2 feet.
.WEDNESDAY...South winds 10 to 20 knots increasing to 15 to
25 knots. Showers. Waves building to 3 to 5 feet occasionally to
7 feet.
.THURSDAY...South winds 10 to 20 knots backing north. A chance of
rain showers. Waves subsiding to calm to 2 feet.

$$

LSZ261-250400-
MAFOR 2421/
Superior West 11610 13700 12800 11100 11800. Patchy fog late
tonight through Sunday. Scattered showers this evening through
late Sunday morning. 1 foot or less.

Superior North Central 13600 11700 12800 11810 11800. Patchy fog
tonight through early Sunday afternoon. Waves 1 to 2 feet.

Superior South Central 11600 12700 11600 11700 12710 11800.
Patchy fog late tonight through early Sunday afternoon. Waves 2
feet or less.

Superior East 11700 11710 13700 12800 11700. Patchy fog this
evening through late Sunday morning. Waves 1 to 2 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


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