Great Lakes Forecast
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FZUS63 KMQT 270149
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
949 PM EDT Wed Jul 26 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 frontal boundary extending from eastern Lake
Superior into southern Wisconsin will move through the lower
Great Lakes by Friday morning while a 30.1 inch high pressure ridge
builds southeastward across the Upper Great Lakes tonight. This
high will linger over the Great Lakes through the weekend. A low
pressure trough of 29.9 inches will move across Lake Superior
Sunday night into Monday.

LSZ162-271000-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
949 PM EDT Wed Jul 26 2017 /849 PM CDT Wed Jul 26 2017/

.REST OF TONIGHT...Northwest winds 5 to 15 knots veering north
after midnight. Waves calm to 2 feet.
.THURSDAY...Northeast winds 5 to 15 knots. A slight chance of
showers by mid afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...Northeast winds 5 to 15 knots becoming
northwest less than 10 knots after midnight. Waves calm to
2 feet.
.FRIDAY...West winds 5 to 15 knots backing east by mid afternoon.
Waves calm to 2 feet.
.FRIDAY NIGHT...East winds less than 10 knots veering west after
midnight. Waves calm to 2 feet.
.SATURDAY...South winds 5 to 15 knots. Waves calm to 2 feet.
.SATURDAY NIGHT...South winds 5 to 15 knots veering southwest
after midnight. Waves calm to 2 feet.
.SUNDAY...Southwest winds 5 to 15 knots veering west. Waves calm
to 2 feet.
.MONDAY...Northeast winds 5 to 15 knots backing north. Waves calm
to 2 feet.

$$

LSZ263-271000-
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 EDT Wed Jul 26 2017

.REST OF TONIGHT...West winds 5 to 15 knots veering north after
midnight. Waves calm to 2 feet.
.THURSDAY...Northeast winds 5 to 15 knots. Waves calm to 2 feet.
.THURSDAY NIGHT...North winds 5 to 15 knots becoming northwest
less than 10 knots after midnight, then veering north late. Waves
calm to 2 feet.
.FRIDAY...Northeast winds less than 10 knots. Waves calm to
2 feet.
.FRIDAY NIGHT...East winds less than 10 knots veering southwest
after midnight. Waves calm to 2 feet.
.SATURDAY...Southwest winds less than 10 knots increasing to 5 to
15 knots by mid afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...South winds 5 to 15 knots veering southwest
after midnight. Waves calm to 2 feet.
.SUNDAY...Southwest winds 5 to 15 knots. Waves calm to 2 feet.
.MONDAY...Northeast winds 5 to 15 knots. Waves building to 1 to
3 feet.

$$

LSZ264-271000-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
949 PM EDT Wed Jul 26 2017

.REST OF TONIGHT...West winds 5 to 15 knots veering north after
midnight. Waves 1 to 3 feet subsiding to calm to 2 feet.
.THURSDAY...Northeast winds 5 to 15 knots backing northwest late.
Waves calm to 2 feet.
.THURSDAY NIGHT...Northwest winds 5 to 15 knots becoming
northeast less than 10 knots late. Waves calm to 2 feet.
.FRIDAY...East winds less than 10 knots veering south by mid
afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...Southwest winds less than 10 knots. Waves calm to
2 feet.
.SATURDAY...Southwest winds less than 10 knots increasing to 5 to
15 knots by mid afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...South winds 5 to 15 knots veering southwest
after midnight. Waves calm to 2 feet.
.SUNDAY...Southwest winds 5 to 15 knots. Waves calm to 2 feet.
.MONDAY...East winds 5 to 15 knots. Waves building to 1 to
3 feet.

$$

LSZ265-271000-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
949 PM EDT Wed Jul 26 2017

.REST OF TONIGHT...West winds 10 to 20 knots becoming northwest
5 to 15 knots after midnight, then veering north late. Waves calm
to 2 feet.
.THURSDAY...North winds 5 to 15 knots. Waves calm to 2 feet.
.THURSDAY NIGHT...Northwest winds 5 to 15 knots becoming north
10 to 20 knots after midnight, then diminishing to 5 to 15 knots
late. Waves calm to 2 feet.
.FRIDAY...Northeast winds 5 to 15 knots. Waves calm to 2 feet.
.FRIDAY NIGHT...Southwest winds 5 to 15 knots. Waves calm to
2 feet.
.SATURDAY...Southwest winds 5 to 15 knots backing southeast by
mid afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...South winds 10 to 20 knots veering southwest
after midnight. Waves calm to 2 feet.
.SUNDAY...Southwest winds 5 to 15 knots veering west. Waves calm
to 2 feet.
.MONDAY...East winds 10 to 20 knots. Waves building to 1 to
3 feet.

$$

LSZ266-271000-
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 EDT Wed Jul 26 2017

.REST OF TONIGHT...West winds 10 to 20 knots veering north late.
Waves 1 to 3 feet subsiding to calm to 2 feet.
.THURSDAY...North winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon, then backing northwest late. Waves
calm to 2 feet.
.THURSDAY NIGHT...Northwest winds 10 to 20 knots veering
northeast late. Waves calm to 2 feet.
.FRIDAY...Northeast winds 5 to 15 knots backing north by mid
afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...Northwest winds 5 to 15 knots backing west after
midnight. Waves calm to 2 feet.
.SATURDAY...West winds 5 to 15 knots backing south by mid
afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...South winds 5 to 15 knots increasing to 10 to
20 knots after midnight. Waves calm to 2 feet.
.SUNDAY...Southwest winds 5 to 15 knots veering west. Waves calm
to 2 feet.
.MONDAY...Northeast winds 5 to 15 knots becoming east 10 to
20 knots. Waves building to 1 to 3 feet.

$$

LSZ267-271000-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
949 PM EDT Wed Jul 26 2017

.REST OF TONIGHT...West winds 5 to 15 knots veering north late.
Waves calm to 2 feet.
.THURSDAY...North winds 10 to 20 knots backing northwest in the
afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...North winds 10 to 20 knots veering northeast
after midnight. Waves calm to 2 feet.
.FRIDAY...Northeast winds 5 to 15 knots backing northwest by mid
afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...Northwest winds 5 to 15 knots. Waves calm to
2 feet.
.SATURDAY...West winds 5 to 15 knots veering northwest by mid
afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...West winds 5 to 15 knots backing southwest
after midnight. Waves calm to 2 feet.
.SUNDAY...Southwest winds 5 to 15 knots. Waves calm to 2 feet.
.MONDAY...North winds 5 to 15 knots veering southeast. Waves calm
to 2 feet.

$$
LSZ261-271000-
MAFOR 2703/
Superior West 11710 11810 11800 14100 11800. Waves 2 feet or
less.

Superior North Central 11710 11810 11800 11100 11800 13700. Waves
calm to 3 feet.

Superior South Central 11710 13810 13800 11710. Waves 2 feet or
less.

Superior East 11610 11710 11110 12810 13720. Waves 1 to 3 feet.

$$

RJT

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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