Great Lakes Forecast
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FZUS63 KMQT 282002
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
402 PM EDT Wed Jun 28 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...29.5 inch low pressure over central Minnesota this
afternoon will track eastward across Lake Superior late tonight
through Thursday morning. A 29.7 inch trough will then linger over
the Upper Great Lakes into Saturday night. The trough will lift to
the northeast on Sunday ahead of a 30.0 inch ridge building across
the Upper Mississippi Valley and western Great Lakes Monday into
Tuesday.

LSZ162-290415-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
402 PM EDT Wed Jun 28 2017 /302 PM CDT Wed Jun 28 2017/

.LATE THIS AFTERNOON...East winds 10 to 20 knots. Showers likely
and a slight chance of thunderstorms. Waves 3 to 5 feet
occasionally to 7 feet subsiding to 2 to 4 feet.
.TONIGHT...Northeast winds 10 to 20 knots backing north late.
Showers likely and a slight chance of thunderstorms through
midnight, then a chance of showers after midnight. Waves
subsiding to calm to 2 feet.
.THURSDAY...West winds 10 to 20 knots becoming northwest 5 to
15 knots late. A chance of showers. Waves calm to 2 feet.
.THURSDAY NIGHT...Northwest winds 5 to 15 knots veering north
late. A slight chance of showers. Waves calm to 2 feet.
.FRIDAY...North winds 5 to 15 knots veering east by mid
afternoon. A chance of showers. Waves calm to 2 feet.
.FRIDAY NIGHT...East winds 5 to 15 knots veering west after
midnight. A chance of showers. Waves calm to 2 feet.
.SATURDAY...West winds 5 to 15 knots. A chance of showers. Waves
calm to 2 feet.
.SATURDAY NIGHT...West winds 5 to 15 knots. Waves calm to 2 feet.
.SUNDAY...Southwest winds 5 to 15 knots veering north. Waves calm
to 2 feet.
.MONDAY...Northeast winds 5 to 15 knots. Waves calm to 2 feet.

$$

LSZ263-290415-
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-
402 PM EDT Wed Jun 28 2017

.LATE THIS AFTERNOON...East winds 10 to 20 knots. Showers likely
and a slight chance of thunderstorms. Waves 2 to 4 feet.
.TONIGHT...East winds 5 to 15 knots backing northeast after
midnight, then increasing to 10 to 20 knots late. A chance of
showers and a slight chance of thunderstorms through midnight,
then showers likely after midnight. Waves subsiding to 1 to
3 feet.
.THURSDAY...North winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon. A chance of showers. Waves subsiding
to calm to 2 feet.
.THURSDAY NIGHT...Northwest winds 5 to 15 knots veering north
late. A slight chance of showers through midnight. Waves calm to
2 feet.
.FRIDAY...North winds less than 10 knots. A chance of showers.
Waves calm to 2 feet.
.FRIDAY NIGHT...West winds less than 10 knots. A chance of
showers. Waves calm to 2 feet.
.SATURDAY...Southwest winds 5 to 15 knots veering west by mid
afternoon. A chance of showers. Waves calm to 2 feet.
.SATURDAY NIGHT...West winds 5 to 15 knots. Waves calm to 2 feet.
.SUNDAY...Southwest winds 5 to 15 knots veering north. Waves calm
to 2 feet.
.MONDAY...Northeast winds 5 to 15 knots veering east. Waves calm
to 2 feet.

$$

LSZ264-290415-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
402 PM EDT Wed Jun 28 2017

.LATE THIS AFTERNOON...Southeast winds 10 to 20 knots. A chance
of showers. Waves 2 to 4 feet.
.TONIGHT...East winds 10 to 20 knots. A chance of rain showers
through midnight. A slight chance of thunderstorms. Rain showers
likely after midnight. Waves subsiding to 1 to 3 feet.
.THURSDAY...Northeast winds 10 to 20 knots becoming north 5 to
15 knots in the afternoon. A chance of rain showers. Waves
subsiding to calm to 2 feet.
.THURSDAY NIGHT...North winds 5 to 15 knots. A slight chance of
showers. Waves calm to 2 feet.
.FRIDAY...North winds 5 to 15 knots becoming west less than
10 knots by mid afternoon. A chance of showers. Waves calm to
2 feet.
.FRIDAY NIGHT...West winds less than 10 knots. A chance of
showers. Waves calm to 2 feet.
.SATURDAY...Southwest winds 5 to 15 knots veering west by mid
afternoon. A chance of showers. Waves calm to 2 feet.
.SATURDAY NIGHT...West winds 5 to 15 knots. Waves calm to 2 feet.
.SUNDAY...Southwest winds 5 to 15 knots veering north. Waves calm
to 2 feet.
.MONDAY...Northeast winds 5 to 15 knots becoming southeast less
than 10 knots. Waves calm to 2 feet.

$$

LSZ265-290415-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
402 PM EDT Wed Jun 28 2017

.LATE THIS AFTERNOON...Southeast winds 10 to 20 knots. Showers
likely and a slight chance of thunderstorms. Waves 2 to 4 feet.
.TONIGHT...Southeast winds 15 to 25 knots diminishing to 10 to
20 knots after midnight, then backing east late. Showers likely
and a chance of thunderstorms. Waves subsiding to 1 to 3 feet.
.THURSDAY...Northwest winds 10 to 20 knots. A chance of showers.
Waves subsiding to calm to 2 feet.
.THURSDAY NIGHT...Northwest winds 10 to 20 knots. A slight chance
of showers. Waves calm to 2 feet.
.FRIDAY...North winds 5 to 15 knots. A chance of showers. Waves
calm to 2 feet.
.FRIDAY NIGHT...Northwest winds 5 to 15 knots backing west after
midnight. A chance of showers. Waves calm to 2 feet.
.SATURDAY...West winds 5 to 15 knots. A chance of showers. Waves
calm to 2 feet.
.SATURDAY NIGHT...West winds 10 to 20 knots. Waves calm to
2 feet.
.SUNDAY...West winds 10 to 20 knots. Waves calm to 2 feet.
.MONDAY...North winds 5 to 15 knots veering southeast. Waves calm
to 2 feet.

$$

LSZ266-290415-
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-
402 PM EDT Wed Jun 28 2017

.LATE THIS AFTERNOON...Southeast winds 15 to 25 knots. A chance
of showers and a slight chance of thunderstorms. Waves 2 to
4 feet.
.TONIGHT...Southeast winds 15 to 25 knots diminishing to 10 to
20 knots after midnight, then backing east late. Rain showers
likely and a chance of thunderstorms. Waves subsiding to 1 to
3 feet.
.THURSDAY...East winds 10 to 20 knots backing northwest in the
afternoon, then veering north late. A slight chance of
thunderstorms through early afternoon. A chance of rain showers.
Waves subsiding to calm to 2 feet.
.THURSDAY NIGHT...Northwest winds 10 to 20 knots veering north
after midnight. A chance of showers. Waves calm to 2 feet.
.FRIDAY...North winds 5 to 15 knots backing northwest by mid
afternoon. A chance of showers. Waves calm to 2 feet.
.FRIDAY NIGHT...Northwest winds 5 to 15 knots. A chance of
showers. Waves calm to 2 feet.
.SATURDAY...West winds 5 to 15 knots. A chance of showers. Waves
calm to 2 feet.
.SATURDAY NIGHT...West winds 10 to 20 knots. Waves calm to
2 feet.
.SUNDAY...West winds 10 to 20 knots diminishing to 5 to 15 knots.
Waves calm to 2 feet.
.MONDAY...North winds 5 to 15 knots backing northwest. Waves calm
to 2 feet.

$$

LSZ267-290415-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
402 PM EDT Wed Jun 28 2017

.LATE THIS AFTERNOON...South winds 15 to 25 knots. A chance of
showers. Waves 1 to 3 feet building to 2 to 4 feet.
.TONIGHT...Southeast winds 15 to 25 knots. Showers and a chance
of thunderstorms. Waves subsiding to 1 to 3 feet.
.THURSDAY...Southeast winds 15 to 25 knots becoming southwest
10 to 20 knots in the afternoon, then veering west late. Showers
likely and a slight chance of thunderstorms through early
afternoon, then a chance of showers by mid afternoon. Waves
subsiding to calm to 2 feet.
.THURSDAY NIGHT...West winds 5 to 15 knots becoming northwest
10 to 20 knots after midnight, then becoming north 5 to 15 knots
late. A chance of showers. Waves calm to 2 feet.
.FRIDAY...North winds 5 to 15 knots backing northwest by mid
afternoon. A chance of showers. Waves calm to 2 feet.
.FRIDAY NIGHT...Northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. A chance of showers. Waves calm to
2 feet.
.SATURDAY...West winds 5 to 15 knots. A chance of showers. Waves
calm to 2 feet.
.SATURDAY NIGHT...West winds 10 to 20 knots. A chance of showers.
Waves calm to 2 feet.
.SUNDAY...West winds 10 to 20 knots diminishing to 5 to 15 knots.
Waves calm to 2 feet.
.MONDAY...Northwest winds 5 to 15 knots. Waves calm to 2 feet.

$$

LSZ261-290415-
MAFOR 2821/
Superior West 11226 11216 12126 11826 12720 11710. Chance of
showers through early afternoon Thursday. Waves 1 to 4 feet.

Superior North Central 12320 11220 11226 11236 12120 11820.
Chance of showers this evening through late Thursday morning.
Waves 2 to 4 feet.

Superior South Central 12336 12326 11426 11620 12710. Chance of
showers early this evening through Thursday. Chance of
thunderstorms tonight. Waves 1 to 4 feet.

Superior East 11320 12326 11336 12326 11310 11710. Chance of
showers this evening through Thursday afternoon. Chance of
thunderstorms from tonight through mid Thursday morning. Waves 1
to 4 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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