National Weather Service Weather Forecast Office

• Home
• Site Map
• News
• Organization
• Search for: NWS All NOAA 

106
FZUS63 KMQT 151018 AAA
GLFLS

Open Lake Forecast for Lake Superior...UPDATED
National Weather Service Marquette MI
518 AM EST Thu Nov 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...Today high pressure of 30.6 inches will move over New
England, followed by low pressure of 29.8 inches tracking over
the Arrowhead of Minnesota. Tonight, this low will deepen to 29.7
inches as it tracks over Lake Superior. This low will continue to
lift northeast towards James Bay Friday night while further
deepening to 29.5 inches. In its wake, a 30.7 inch high will move
south across the northern Plains on Saturday. This high will shift
over the central Plains by Sunday morning as a 30.1 inch low
pressure trough slides south across Lake Superior. A 30.4 inch
ridge will then begin to build south towards the Upper Great Lakes
on Monday.

LSZ162-151830-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
518 AM EST Thu Nov 15 2018 /418 AM CST Thu Nov 15 2018/

...GALE WARNING IN EFFECT UNTIL 7 AM EST /6 AM CST/ THIS
MORNING...

.EARLY THIS MORNING...Southwest gales to 35 knots. Waves 6 to
10 feet occasionally to 13 feet.
.TODAY...Southwest gales to 35 knots diminishing to 10 to
20 knots early. Areas of drizzle in the afternoon. Waves
subsiding to 2 to 4 feet.
.TONIGHT...West winds 5 to 15 knots becoming northwest 10 to
20 knots by midnight, then increasing to 15 to 25 knots late.
Widespread drizzle and numerous snow showers in the evening, then
areas of drizzle after midnight. Waves subsiding to 1 to 3 feet,
then building to 3 to 5 feet occasionally to 7 feet.
.FRIDAY...Northwest winds 15 to 25 knots. Isolated rain and snow
showers. Waves subsiding to 2 to 4 feet, then building to 3 to
5 feet occasionally to 7 feet.
.FRIDAY NIGHT...North winds 10 to 20 knots. Scattered snow
showers. Waves subsiding to 2 to 4 feet.
.SATURDAY...North winds 10 to 20 knots backing northwest in the
afternoon. Waves subsiding to 1 to 3 feet.
.SATURDAY NIGHT...West winds 15 to 25 knots increasing to 20 to
30 knots after midnight. Freezing spray after midnight. Waves
building to 3 to 6 feet occasionally to 8 feet.
.SUNDAY...West winds 20 to 30 knots becoming northwest 15 to
25 knots. Waves building to 4 to 7 feet occasionally to 9 feet,
then subsiding to calm to 2 feet.
.MONDAY...North winds 5 to 15 knots veering southeast. Waves
building to 1 to 3 feet.

$$

LSZ263-151830-
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-
518 AM EST Thu Nov 15 2018

...GALE WARNING IN EFFECT UNTIL 9 AM EST THIS MORNING...

.EARLY THIS MORNING...Southwest gales to 35 knots. Waves 7 to
10 feet occasionally to 13 feet.
.TODAY...Southwest gales to 35 knots diminishing to 10 to
20 knots early. Patchy drizzle. Waves subsiding to 3 to 5 feet
occasionally to 7 feet.
.TONIGHT...Southwest winds 5 to 15 knots becoming northwest 10 to
20 knots by midnight, then increasing to 15 to 25 knots late.
Widespread drizzle in the evening. Numerous snow showers. Areas
of drizzle after midnight. Waves subsiding to 1 to 3 feet, then
building to 3 to 6 feet occasionally to 8 feet.
.FRIDAY...Northwest winds 15 to 25 knots. Isolated rain and snow
showers. Waves 3 to 6 feet occasionally to 8 feet.
.FRIDAY NIGHT...North winds 15 to 25 knots. Scattered snow
showers. Waves subsiding to 3 to 6 feet occasionally to 8 feet.
.SATURDAY...North winds 10 to 20 knots backing northwest in the
afternoon. Scattered snow showers. Waves subsiding to 1 to
3 feet.
.SATURDAY NIGHT...West winds 15 to 25 knots increasing to 20 to
30 knots after midnight. Scattered snow showers. Waves building
to 4 to 7 feet occasionally to 9 feet.
.SUNDAY...West winds 20 to 30 knots becoming northwest 15 to
25 knots. Freezing spray. Scattered snow showers. Waves building
to 5 to 8 feet occasionally to 10 feet, then subsiding to 1 to
3 feet.
.MONDAY...North winds 5 to 15 knots veering southeast. A chance
of snow showers. Waves subsiding to calm to 2 feet, then building
to 1 to 3 feet.

$$

LSZ264-151830-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
518 AM EST Thu Nov 15 2018

...GALE WARNING IN EFFECT UNTIL 9 AM EST THIS MORNING...

.EARLY THIS MORNING...Southwest gales to 40 knots. Waves 7 to
10 feet occasionally to 13 feet.
.TODAY...Southwest gales to 35 knots diminishing to 15 to
25 knots early. Patchy drizzle. Waves subsiding to 3 to 6 feet
occasionally to 8 feet.
.TONIGHT...Southwest winds 10 to 20 knots becoming west 5 to
15 knots by midnight, then becoming northwest 15 to 25 knots
late. Widespread drizzle and numerous snow showers. Waves
subsiding to 1 to 3 feet, then building to 3 to 5 feet
occasionally to 7 feet.
.FRIDAY...Northwest winds 20 to 30 knots. A few gale force gusts
to 35 knots possible. Isolated rain showers in the morning.
Isolated snow showers. Waves building to 6 to 9 feet occasionally
to 11 feet, then subsiding to 4 to 7 feet occasionally to 9 feet.
.FRIDAY NIGHT...North winds 20 to 30 knots. Scattered snow
showers. Waves 4 to 7 feet occasionally to 9 feet.
.SATURDAY...North winds 20 to 30 knots becoming northwest 15 to
25 knots in the afternoon. Freezing spray in the morning.
Scattered snow showers. Waves subsiding to 2 to 4 feet.
.SATURDAY NIGHT...West winds 20 to 30 knots increasing to gales
to 35 knots after midnight. Scattered snow showers. Waves
building to 4 to 7 feet occasionally to 9 feet.
.SUNDAY...West gales to 35 knots becoming north 15 to 25 knots.
Numerous snow showers, then a chance of snow showers. Freezing
spray. Waves building to 5 to 8 feet occasionally to 10 feet,
then subsiding to 2 to 4 feet.
.MONDAY...North winds 10 to 20 knots backing northwest. A chance
of snow showers. Waves subsiding to calm to 2 feet.

$$

LSZ265-151830-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
518 AM EST Thu Nov 15 2018

...GALE WARNING IN EFFECT UNTIL 1 PM EST THIS AFTERNOON...

.EARLY THIS MORNING...South gales to 35 knots. Waves 3 to 6 feet
occasionally to 8 feet.
.TODAY...South winds 20 to 30 knots diminishing to 15 to
25 knots. Patchy drizzle in the afternoon. Waves subsiding to
2 to 4 feet.
.TONIGHT...Southwest winds 15 to 25 knots diminishing to 10 to
20 knots by midnight, then veering northwest late. Scattered snow
showers in the evening. Areas of drizzle. Numerous snow showers
after midnight. Waves subsiding to calm to 2 feet, then building
to 2 to 4 feet.
.FRIDAY...Northwest winds 20 to 30 knots. A few gale force gusts
to 35 knots possible. Scattered rain showers, possibly mixed with
snow. Waves building to 4 to 8 feet occasionally to 10 feet.
.FRIDAY NIGHT...Northwest winds 20 to 30 knots veering north
after midnight. Scattered snow showers in the evening, then
periods of snow showers after midnight. Waves subsiding to 3 to
6 feet occasionally to 8 feet, then building to 5 to 8 feet
occasionally to 10 feet.
.SATURDAY...North winds 15 to 25 knots backing northwest in the
afternoon. Numerous snow showers. Waves subsiding to 2 to 4 feet.
.SATURDAY NIGHT...West winds 20 to 30 knots. Numerous snow
showers in the evening, then scattered snow showers after
midnight. Waves building to 3 to 5 feet occasionally to 7 feet.
.SUNDAY...West gales to 35 knots becoming northwest 20 to
30 knots. Scattered snow showers, then snow showers. Waves
building to 3 to 6 feet occasionally to 8 feet, then subsiding to
2 to 4 feet.
.MONDAY...Northwest winds 10 to 20 knots backing west. Snow
showers likely, then a chance of snow showers. Waves subsiding to
calm to 2 feet.

$$

LSZ266-151830-
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-
518 AM EST Thu Nov 15 2018

...GALE WARNING IN EFFECT UNTIL 1 PM EST THIS AFTERNOON...

.EARLY THIS MORNING...South gales to 40 knots. Waves 8 to 11 feet
occasionally to 14 feet.
.TODAY...South gales to 35 knots diminishing to 20 to 30 knots by
mid afternoon. Patchy drizzle in the afternoon. Waves subsiding
to 5 to 8 feet occasionally to 10 feet.
.TONIGHT...Southwest winds 15 to 25 knots diminishing to 10 to
20 knots by midnight, then veering west late. Areas of drizzle
and scattered snow showers in the evening, then widespread
drizzle and numerous snow showers after midnight. Waves subsiding
to 1 to 3 feet.
.FRIDAY...Northwest winds 20 to 30 knots. A few gale force gusts
to 35 knots possible. Scattered rain and snow showers. Waves
building to 7 to 10 feet occasionally to 13 feet.
.FRIDAY NIGHT...Northwest winds becoming north 20 to 30 knots
after midnight. Scattered snow showers in the evening, then
periods of snow showers after midnight. Waves subsiding to 5 to 8
feet occasionally to 10 feet.
.SATURDAY...North winds 20 to 30 knots becoming northwest 15 to
25 knots in the afternoon. Numerous snow showers. Waves subsiding
to 3 to 5 feet occasionally to 7 feet.
.SATURDAY NIGHT...West winds 20 to 30 knots. Periods of snow
showers. Waves building to 4 to 7 feet occasionally to 9 feet.
.SUNDAY...West gales to 35 knots becoming northwest 20 to
30 knots. Snow showers. Waves building to 6 to 9 feet
occasionally to 11 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet.
.MONDAY...North winds 10 to 20 knots backing southwest. Snow
showers likely, then a chance of snow showers. Waves subsiding to
1 to 3 feet.

$$

LSZ267-151830-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
518 AM EST Thu Nov 15 2018

...GALE WARNING IN EFFECT UNTIL 1 PM EST THIS AFTERNOON...

.EARLY THIS MORNING...South gales to 35 knots. Waves 6 to 9 feet
occasionally to 11 feet.
.TODAY...South gales to 35 knots diminishing to 20 to 30 knots by
mid afternoon. Waves building to 7 to 10 feet occasionally to
13 feet, then subsiding to 4 to 7 feet occasionally to 9 feet.
.TONIGHT...South winds 20 to 30 knots diminishing to 15 to
25 knots by midnight, then becoming southwest 10 to 20 knots
late. Areas of drizzle and scattered snow showers in the evening,
then widespread drizzle and numerous snow showers after midnight.
Waves subsiding to 1 to 3 feet.
.FRIDAY...Northwest winds 15 to 25 knots. A few gale force gusts
to 35 knots possible. Numerous snow showers in the morning.
Scattered rain showers. Scattered snow showers in the afternoon.
Waves subsiding to calm to 2 feet, then building to 7 to 10 feet
occasionally to 13 feet.
.FRIDAY NIGHT...Northwest winds becoming north 20 to 30 knots
after midnight. Scattered snow showers. Waves subsiding to 4 to 7
feet occasionally to 9 feet.
.SATURDAY...North winds 20 to 30 knots becoming northwest 15 to
25 knots in the afternoon. Scattered snow showers in the morning,
then numerous snow showers in the afternoon. Waves subsiding to
3 to 5 feet occasionally to 7 feet.
.SATURDAY NIGHT...West winds 20 to 30 knots. Periods of snow
showers in the evening, then scattered snow showers after
midnight. Waves building to 3 to 6 feet occasionally to 8 feet.
.SUNDAY...West gales to 35 knots becoming northwest 20 to
30 knots. Snow showers. Waves building to 5 to 8 feet
occasionally to 10 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet.
.MONDAY...North winds 15 to 25 knots becoming southwest 10 to
20 knots. Snow showers likely, then a chance of snow showers.
Waves subsiding to calm to 2 feet, then building to 1 to 3 feet.

$$
LSZ261-151830-
MAFOR 1510/
Superior West...GALE WARNING IN EFFECT...11550 11540 11530 12520
11616 11736 11735. Waves 5 to 9 feet subsiding to 3 to 5 feet
today. Waves 2 to 4 feet tonight.

Superior North Central...GALE WARNING IN EFFECT...11550 11540
11530 12520 11516 11517 11737. Waves 6 to 10 feet subsiding to 4
to 7 feet today. Waves 3 to 5 feet subsiding to 2 to 4 feet
tonight.

Superior South Central...GALE WARNING IN EFFECT...11450 13440
11430 11530 11527 11617. Waves 5 to 8 feet subsiding to 3 to 6
feet today. Waves 3 to 6 feet subsiding to 1 to 3 feet tonight.

Superior East...GALE WARNING IN EFFECT...13450 13440 11530 11517.
A chance of rain showers tonight. Waves 7 to 11 feet subsiding to
6 to 9 feet today. Waves 5 to 8 feet subsiding to 2 to 4 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