Great Lakes Forecast
Issued by NWS

Home | Current Version | Previous Version | Graphics & Text | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28
000
FZUS63 KMQT 131454
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
954 AM EST Wed Dec 13 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 low pressure system of 29.5 inches over southwest
Wisconsin late this morning will move to southern Lake Michigan
this afternoon. A weak low pressure system of 30.0 inches will
then form near Lake Superior Thursday and strengthen on Friday as
it moves over Lake Huron at 29.6 inches by the evening. Weak
ridging of 30.2 inches Saturday will give way to another trough on
Sunday.

LSZ162-132300-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
954 AM EST Wed Dec 13 2017 /854 AM CST Wed Dec 13 2017/

.REST OF TODAY...East winds 15 to 25 knots becoming northeast 20
to 30 knots by mid afternoon. Snow. Waves 3 to 5 feet occasionally
to 7 feet subsiding to 2 to 4 feet, then building to 3 to 6 feet
occasionally to 8 feet.
.TONIGHT...Northeast winds 15 to 25 knots becoming north 5 to
15 knots by midnight. Isolated snow showers. Waves subsiding to
1 to 3 feet.
.THURSDAY...Northwest winds 5 to 15 knots. A slight chance of
snow showers. Waves subsiding to calm to 2 feet.
.THURSDAY NIGHT...Northwest winds 5 to 15 knots increasing to
10 to 20 knots after midnight. A chance of snow showers. Waves
building to 1 to 3 feet.
.FRIDAY...Northwest winds 10 to 20 knots veering north in the
afternoon. A chance of snow showers. Waves 1 to 3 feet.
.FRIDAY NIGHT...North winds 10 to 20 knots becoming east 5 to
15 knots after midnight. Waves subsiding to calm to 2 feet.
.SATURDAY...Southeast winds 5 to 15 knots veering south. A chance
of snow showers. Waves building to 1 to 3 feet, then subsiding to
calm to 2 feet.
.SUNDAY...West winds 5 to 15 knots increasing to 15 to 25 knots.
Waves building to 3 to 5 feet occasionally to 7 feet.

$$

LSZ263-132300-
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-
954 AM EST Wed Dec 13 2017

.REST OF TODAY...East winds 15 to 25 knots backing northeast by
mid afternoon. Snow likely. Waves 2 to 4 feet building to 3 to 6
feet occasionally to 8 feet.
.TONIGHT...North winds 15 to 25 knots diminishing to 5 to
15 knots. Scattered snow showers. Waves subsiding to 1 to 3 feet.
.THURSDAY...North winds 5 to 15 knots backing northwest. A chance
of snow showers. Waves subsiding to calm to 2 feet.
.THURSDAY NIGHT...Northwest winds 5 to 15 knots increasing to
10 to 20 knots after midnight. A chance of snow showers. Waves
building to 1 to 3 feet.
.FRIDAY...North winds 10 to 20 knots. A chance of snow showers.
Waves building to 2 to 4 feet, then subsiding to 1 to 3 feet.
.FRIDAY NIGHT...North winds 10 to 20 knots becoming northeast
5 to 15 knots after midnight. A chance of snow showers. Waves
subsiding to calm to 2 feet.
.SATURDAY...Southeast winds 5 to 15 knots veering south. A chance
of snow showers. Waves building to 1 to 3 feet, then subsiding to
calm to 2 feet.
.SUNDAY...West winds 5 to 15 knots increasing to 15 to 25 knots.
A chance of snow showers. Waves building to 3 to 5 feet
occasionally to 7 feet.

$$

LSZ264-132300-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
954 AM EST Wed Dec 13 2017

.REST OF TODAY...East winds 10 to 20 knots increasing to 15 to
25 knots by late morning, then backing northeast by mid
afternoon. A chance of snow. Waves 1 to 3 feet building to 3 to
5 feet occasionally to 7 feet.
.TONIGHT...North winds 15 to 25 knots diminishing to 5 to
15 knots. Scattered snow showers. Waves subsiding to 1 to 3 feet.
.THURSDAY...North winds 5 to 15 knots backing northwest by late
morning, then increasing to 10 to 20 knots by mid afternoon. A
slight chance of snow showers. Waves subsiding to calm to 2 feet,
then building to 1 to 3 feet.
.THURSDAY NIGHT...Northwest winds 10 to 20 knots. A chance of
snow showers. Waves 1 to 3 feet.
.FRIDAY...North winds 10 to 20 knots increasing to 15 to 25 knots
in the afternoon. A chance of snow showers. Waves building to
3 to 5 feet occasionally to 7 feet.
.FRIDAY NIGHT...North winds 15 to 25 knots diminishing to 5 to
15 knots after midnight. A chance of snow showers. Waves
subsiding to calm to 2 feet.
.SATURDAY...South winds 10 to 20 knots. A chance of snow showers.
Waves building to 3 to 5 feet occasionally to 7 feet, then
subsiding to 2 to 4 feet.
.SUNDAY...West winds 5 to 15 knots increasing to 15 to 25 knots.
A chance of snow showers. Waves subsiding to calm to 2 feet, then
building to 3 to 5 feet occasionally to 7 feet.

$$

LSZ265-132300-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
954 AM EST Wed Dec 13 2017

.REST OF TODAY...Southeast winds 15 to 25 knots backing northeast
by mid afternoon. Snow likely. Waves 1 to 3 feet building to 2 to
4 feet.
.TONIGHT...North winds 15 to 25 knots. Scattered snow showers.
Waves 2 to 4 feet.
.THURSDAY...Northwest winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. A chance of snow showers. Waves
subsiding to 1 to 3 feet.
.THURSDAY NIGHT...Northwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. A chance of snow showers in the
evening, then snow showers likely after midnight. Waves 1 to
3 feet.
.FRIDAY...North winds 15 to 25 knots. Snow showers. Waves
building to 3 to 5 feet occasionally to 7 feet.
.FRIDAY NIGHT...North winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. A chance of snow showers. Waves building
to 3 to 6 feet occasionally to 8 feet, then subsiding to 1 to
3 feet.
.SATURDAY...South winds 10 to 20 knots increasing to 15 to
25 knots. A chance of snow showers, then snow showers likely.
Waves subsiding to calm to 2 feet, then building to 2 to 4 feet.
.SUNDAY...Southwest winds 10 to 20 knots becoming west 15 to
25 knots. A chance of snow showers. Waves subsiding to calm to
2 feet, then building to 2 to 4 feet.

$$

LSZ266-132300-
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-
954 AM EST Wed Dec 13 2017

.REST OF TODAY...East winds 15 to 25 knots backing northeast by
mid afternoon. A chance of snow. Waves 1 to 3 feet building to
2 to 4 feet.
.TONIGHT...North winds 20 to 30 knots diminishing to 15 to
25 knots by midnight. Scattered snow showers. Waves 2 to 4 feet.
.THURSDAY...North winds 10 to 20 knots backing northwest by late
morning, then increasing to 15 to 25 knots by mid afternoon. A
chance of snow showers. Waves subsiding to 1 to 3 feet.
.THURSDAY NIGHT...Northwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. A chance of snow showers in the
evening, then snow showers after midnight. Waves building to 2 to
4 feet, then subsiding to 1 to 3 feet.
.FRIDAY...North winds 15 to 25 knots. Snow showers. Waves
building to 3 to 6 feet occasionally to 8 feet.
.FRIDAY NIGHT...North winds 20 to 30 knots diminishing to 10 to
20 knots after midnight. A chance of snow showers. Waves
subsiding to 2 to 4 feet.
.SATURDAY...South winds 10 to 20 knots increasing to 15 to
25 knots. A chance of snow showers. Waves subsiding to calm to
2 feet, then building to 3 to 6 feet occasionally to 8 feet.
.SUNDAY...Southwest winds 10 to 20 knots becoming west 15 to
25 knots. A chance of snow showers. Waves subsiding to calm to
2 feet, then building to 3 to 5 feet occasionally to 7 feet.

$$

LSZ267-132300-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
954 AM EST Wed Dec 13 2017

.REST OF TODAY...East winds 10 to 20 knots becoming northeast
15 to 25 knots by mid afternoon. A slight chance of snow. Waves
calm to 2 feet building to 1 to 3 feet.
.TONIGHT...Northeast winds 15 to 25 knots backing north by
midnight. Scattered snow showers. Waves building to 2 to 4 feet,
then subsiding to 1 to 3 feet.
.THURSDAY...North winds 10 to 20 knots backing northwest. A
chance of snow showers in the morning, then snow showers likely
in the afternoon. Waves subsiding to calm to 2 feet, then
building to 1 to 3 feet.
.THURSDAY NIGHT...Northwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. Snow showers. Waves building to
2 to 4 feet, then subsiding to 1 to 3 feet.
.FRIDAY...North winds 10 to 20 knots increasing to 15 to 25 knots
in the afternoon. Snow showers. Waves building to 2 to 4 feet.
.FRIDAY NIGHT...North winds 20 to 30 knots diminishing to 15 to
25 knots after midnight. A chance of snow showers. Waves building
to 3 to 5 feet occasionally to 7 feet, then subsiding to 1 to
3 feet.
.SATURDAY...Southeast winds 10 to 20 knots becoming south 15 to
25 knots. A chance of snow showers. Waves subsiding to calm to
2 feet, then building to 3 to 5 feet occasionally to 7 feet.
.SUNDAY...South winds 15 to 25 knots veering west. A chance of
snow showers. Waves subsiding to calm to 2 feet, then building to
3 to 5 feet occasionally to 7 feet.

$$
LSZ261-132300-
MAFOR 1316/
Superior West 11237 11147 11140 11130 11820 13810. Freezing spray
through early evening. Scattered snow showers through early
evening. Waves 3 to 6 feet this afternoon. Waves subsiding to 1
to 4 feet tonight and Thursday morning.

Superior North Central 11230 12130 11830 13820 11710. Chance of
snow this afternoon. Scattered snow showers overnight. Waves 2 to
5 feet.

Superior South Central 11227 12130 11830 12820 12720. Chance of
snow late this afternoon. Scattered snow showers tonight through
Thursday morning. Waves 2 to 4 feet.

Superior East 11220 11120 12130 13820 11810. Scattered snow
showers tonight and Thursday morning. Waves 2 to 4 feet.

$$

Kluber

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

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



USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.