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National Weather Service Marine Forecast FZUS63 KMQT

FZUS63 KMQT 260750
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
350 AM EDT Fri Apr 26 2019

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 29.7 inches will move across Lake
Superior tonight, while phasing with a 29.3 inch low over the
eastern Great Lakes. Quickly in its wake, a high pressure ridge
of 30.0 inches will move into the Upper Great Lakes tonight. This
ridge will linger across the Upper Great Lakes through Saturday.
A low pressure of 29.4 will push across Illinois and into the Ohio
Valley Saturday night, weakening to 29.6 inches early Sunday.
Behind this low, high pressure of 30.3 inches will build across
the Great Lakes region Sunday. A weak 30.0 inch trough will cross
the region on Monday afternoon, with 30.2 inch ridging returning
on Tuesday.

LSZ162-261600-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
350 AM EDT Fri Apr 26 2019 /250 AM CDT Fri Apr 26 2019/

EARLY THIS MORNING
West winds 15 to 25 knots. Waves 1 to
3 feet building to 2 to 4 feet.

TODAY
Northwest winds 15 to 25 knots diminishing to 5 to
15 knots in the afternoon, then backing west late. Waves
subsiding to calm to 2 feet.

TONIGHT
North winds 5 to 15 knots veering east after midnight,
then diminishing to less than 10 knots late. Waves calm to
2 feet.

SATURDAY
East winds less than 10 knots increasing to 5 to
15 knots in the afternoon, then veering south late. Waves calm to
2 feet.

SATURDAY NIGHT
Southeast winds less than 10 knots. Waves calm
to 2 feet.

SUNDAY
Southeast winds less than 10 knots becoming east 5 to
15 knots by mid afternoon. Waves calm to 2 feet.

SUNDAY NIGHT
East winds 5 to 15 knots veering southeast after
midnight. A chance of rain showers, possibly mixed with snow
through midnight, then rain and snow showers likely after
midnight. Waves building to 1 to 3 feet.

MONDAY
East winds 5 to 15 knots backing northeast. Rain and
snow showers likely, then a chance of rain and snow showers.
Waves subsiding to calm to 2 feet.

TUESDAY
North winds 5 to 15 knots veering east. Waves calm to
2 feet.



LSZ263-261600-
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-
350 AM EDT Fri Apr 26 2019

EARLY THIS MORNING
West winds 15 to 25 knots. Waves 1 to
3 feet building to 2 to 4 feet.

TODAY
Northwest winds 25 to 30 knots with a few gale force
gusts to 35 knots, becoming west 15 to 25 knots late. Waves
building to 5 to 8 feet occasionally to 10 feet, then subsiding to
2 to 4 feet.

TONIGHT
East winds 15 to 25 knots becoming north 10 to
20 knots after midnight, then diminishing to 5 to 15 knots late.
Waves subsiding to 1 to 3 feet.

SATURDAY
Northeast winds 5 to 15 knots becoming south less
than 10 knots late. Waves subsiding to calm to 2 feet.

SATURDAY NIGHT
West winds 5 to 15 knots becoming northwest
less than 10 knots after midnight. Waves calm to 2 feet.

SUNDAY
South winds less than 10 knots becoming east 5 to
15 knots by mid afternoon. Waves calm to 2 feet.

SUNDAY NIGHT
Southeast winds 5 to 15 knots. A chance of rain
and snow showers. Waves building to 1 to 3 feet.

MONDAY
East winds 10 to 20 knots becoming northeast 5 to
15 knots. Rain showers, possibly mixed with snow, then a chance
of rain and snow showers. Waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to calm to 2 feet.

TUESDAY
North winds 5 to 15 knots veering east. Waves calm to
2 feet.



LSZ264-261600-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
350 AM EDT Fri Apr 26 2019

...GALE WARNING IN EFFECT FROM 9 AM EDT THIS MORNING THROUGH THIS
AFTERNOON...

EARLY THIS MORNING
Northwest winds 10 to 20 knots. A chance of
rain showers. Waves calm to 2 feet building to 1 to 3 feet.

TODAY
Northwest gales to 35 knots veering north in the
afternoon, then diminishing to 20 to 30 knots late. A slight
chance of rain showers. A slight chance of snow showers by mid
afternoon. Waves building to 8 to 11 feet occasionally to
14 feet, then subsiding to 6 to 9 feet occasionally to 11 feet.

TONIGHT
North winds 20 to 30 knots diminishing to 10 to
20 knots. Waves subsiding to 3 to 5 feet occasionally to 7 feet.

SATURDAY
North winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon, then backing northwest late. Waves
subsiding to calm to 2 feet.

SATURDAY NIGHT
Northwest winds 5 to 15 knots veering north
after midnight. Waves calm to 2 feet.

SUNDAY
South winds less than 10 knots increasing to 5 to
15 knots by mid afternoon. Waves calm to 2 feet.

SUNDAY NIGHT
Southeast winds 5 to 15 knots. A chance of rain
and snow showers after midnight. Waves building to 1 to 3 feet.

MONDAY
Southeast winds 10 to 20 knots diminishing to 5 to
15 knots. A chance of rain and snow showers. Waves building to
3 to 5 feet occasionally to 7 feet, then subsiding to 1 to
3 feet.

TUESDAY
North winds 5 to 15 knots veering east. Waves
subsiding to calm to 2 feet.



LSZ265-261600-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
350 AM EDT Fri Apr 26 2019

...GALE WARNING IN EFFECT FROM 11 AM EDT THIS MORNING THROUGH
THIS EVENING...

EARLY THIS MORNING
West winds 15 to 25 knots. Waves calm to
2 feet.

TODAY
Northwest winds 15 to 25 knots increasing to gales to
35 knots in the afternoon, then veering north late. A slight
chance of rain showers. A slight chance of snow showers by mid
afternoon. Waves building to 7 to 11 feet occasionally to
14 feet.

TONIGHT
North winds 20 to 30 knots diminishing to 10 to
20 knots. Waves subsiding to 3 to 6 feet occasionally to 8 feet.

SATURDAY
North winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon. Waves subsiding to 1 to 3 feet.

SATURDAY NIGHT
Northwest winds 5 to 15 knots veering north
after midnight. Waves subsiding to calm to 2 feet.

SUNDAY
East winds 5 to 15 knots veering southeast by mid
afternoon. Waves calm to 2 feet.

SUNDAY NIGHT
Southeast winds 10 to 20 knots. A chance of rain
and snow showers after midnight. Waves building to 1 to 3 feet.

MONDAY
Southeast winds 15 to 25 knots diminishing to 5 to
15 knots. A chance of rain and snow showers. Waves building to
3 to 5 feet occasionally to 7 feet, then subsiding to calm to
2 feet.

TUESDAY
North winds 10 to 20 knots becoming east 5 to
15 knots. Waves calm to 2 feet.



LSZ266-261600-
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-
350 AM EDT Fri Apr 26 2019

...GALE WARNING IN EFFECT FROM 11 AM EDT THIS MORNING THROUGH
LATE TONIGHT...

EARLY THIS MORNING
West winds 10 to 20 knots. Waves calm to
2 feet.

TODAY
Northwest winds 20 to 30 knots increasing to gales to
35 knots in the afternoon, then becoming north gales to 40 knots
late. A slight chance of rain showers. A slight chance of snow
showers by mid afternoon. Waves building to 11 to 15 feet
occasionally to 19 feet.

TONIGHT
North gales to 40 knots diminishing to 20 to 30 knots
late. Waves subsiding to 6 to 9 feet occasionally to 11 feet.

SATURDAY
North winds 15 to 25 knots diminishing to 10 to
20 knots in the afternoon, then backing northwest late. Waves
subsiding to 3 to 5 feet occasionally to 7 feet.

SATURDAY NIGHT
North winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. Waves subsiding to 1 to 3 feet.

SUNDAY
North winds 5 to 15 knots veering south by mid
afternoon. Waves subsiding to calm to 2 feet.

SUNDAY NIGHT
Southeast winds 5 to 15 knots. A chance of rain
and snow showers after midnight. Waves building to 1 to 3 feet.

MONDAY
Southeast winds 10 to 20 knots diminishing to 5 to
15 knots. A chance of rain and snow showers. Waves building to
3 to 5 feet occasionally to 7 feet, then subsiding to calm to
2 feet.

TUESDAY
Northwest winds 5 to 15 knots veering north. Waves
calm to 2 feet.



LSZ267-261600-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
350 AM EDT Fri Apr 26 2019

...GALE WARNING IN EFFECT FROM 2 PM EDT THIS AFTERNOON THROUGH
LATE TONIGHT...

EARLY THIS MORNING
Southeast winds less than 10 knots. Waves
calm to 2 feet.

TODAY
Northwest winds 15 to 25 knots increasing to gales to
40 knots. A chance of rain showers, possibly mixed with snow by
mid afternoon. Waves building to 11 to 15 feet occasionally to
19 feet.

TONIGHT
North gales to 45 knots. A chance of rain and snow
showers through midnight. Waves subsiding to 5 to 8 feet
occasionally to 10 feet.

SATURDAY
North winds 15 to 25 knots backing northwest in the
afternoon. Waves subsiding to 3 to 5 feet occasionally to 7 feet.

SATURDAY NIGHT
North winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. Waves subsiding to 1 to 3 feet.

SUNDAY
North winds 10 to 20 knots becoming northwest 5 to
15 knots by mid afternoon. Waves subsiding to calm to 2 feet.

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

MONDAY
Southeast winds 15 to 25 knots diminishing to 10 to
20 knots. A chance of rain and snow showers. Waves building to
1 to 3 feet, then subsiding to calm to 2 feet.

TUESDAY
Northwest winds 5 to 15 knots veering north. Waves
calm to 2 feet.



LSZ261-261600-
MAFOR 2609/

Superior West 12730 11720 11610 11600 11700 11200 11300. Waves 1
to 4 feet.

Superior North Central...GALE WARNING IN EFFECT...11720 11740
12850 13840 11830. A chance of rain showers early this morning.
Waves 1 to 3 feet building to 8 to 11 feet today. Waves 6 to 9
feet subsiding to 3 to 6 feet tonight.

Superior South Central...GALE WARNING IN EFFECT...11620 11730
13750 11850 12840. Waves 1 to 3 feet building to 9 to 12 feet
today. Waves 8 to 12 feet subsiding to 6 to 10 feet tonight.

Superior East...GALE WARNING IN EFFECT...11500 11720 11730 11750
11760 13850. A chance of rain and snow showers this afternoon and
evening. Waves 1 foot or less building to 9 to 12 feet today.
Waves 10 to 14 feet subsiding to 7 to 11 feet tonight.



Ritzman

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

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