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 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
000
FZUS63 KMQT 150251
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
951 PM EST Sun Jan 14 2018

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 30.2 inch trough over the Upper Mississippi Valley
will consolidate into a low over southern Lake Michigan by Monday
afternoon, then dissipate while drifting across the eastern Great
Lakes through Tuesday. Tuesday night through Wednesday night, Lake
Superior will be between 29.6 inch low pressure over far northern
Ontario and 30.8 inch high pressure over the Middle Mississippi
Valley. A 29.8 inch trough will then drift from northern Ontario
to the Upper Great Lakes Thursday through Friday.

LSZ162-151100-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
951 PM EST Sun Jan 14 2018 /851 PM CST Sun Jan 14 2018/

.REST OF TONIGHT...South winds 15 to 25 knots becoming southwest
10 to 20 knots by midnight, then becoming north 5 to 15 knots
late. Snow. Waves 3 to 6 feet occasionally to 8 feet subsiding to
calm to 2 feet.
.MONDAY...Northeast winds 10 to 20 knots increasing to 15 to
25 knots. Numerous snow showers. Waves building to 3 to 5 feet
occasionally to 7 feet.
.MONDAY NIGHT...Northeast winds 20 to 30 knots with a few gale
force gusts to 35 knots backing north by midnight, then
diminishing to 15 to 25 knots late. Freezing spray. Scattered snow
showers. Waves building to 6 to 9 feet occasionally to 11 feet,
then subsiding to 4 to 7 feet occasionally to 9 feet.
.TUESDAY...North winds 10 to 20 knots becoming west 5 to 15 knots
in the afternoon. Isolated snow showers. Waves subsiding to 1 to
3 feet.
.TUESDAY NIGHT...West winds 10 to 20 knots increasing to 20 to
30 knots after midnight. Waves building to 3 to 6 feet
occasionally to 8 feet.
.WEDNESDAY...West winds 20 to 30 knots increasing to gales to
35 knots in the afternoon. Heavy freezing spray. Waves building
to 6 to 9 feet occasionally to 11 feet.
.WEDNESDAY NIGHT...West gales to 35 knots becoming southwest
20 to 30 knots after midnight. Freezing spray after midnight.
Waves subsiding to 3 to 6 feet occasionally to 8 feet.
.THURSDAY...Southwest winds 15 to 25 knots diminishing to 10 to
20 knots. Waves subsiding to calm to 2 feet.
.FRIDAY...Southwest winds 5 to 15 knots. Waves calm to 2 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ263-151100-
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-
951 PM EST Sun Jan 14 2018

.REST OF TONIGHT...South winds 20 to 30 knots diminishing to 5 to
15 knots and turning east late. Freezing spray late in the
evening. Snow. Waves 3 to 6 feet occasionally to 8 feet subsiding
to 1 to 3 feet.
.MONDAY...East winds 10 to 20 knots increasing to 15 to 25 knots.
Snow showers. Waves building to 4 to 7 feet occasionally to
9 feet, then subsiding to 3 to 6 feet occasionally to 8 feet.
.MONDAY NIGHT...Northeast winds 20 to 30 knots with a few gale
force gusts to 35 knots becoming north 20 to 30 knots late.
Freezing spray. Snow showers. Waves building to 5 to 9 feet
occasionally to 11 feet.
.TUESDAY...North winds 15 to 25 knots becoming west 5 to 15 knots
in the afternoon. Freezing spray in the morning. Scattered snow
showers. Waves subsiding to 1 to 3 feet.
.TUESDAY NIGHT...West winds 15 to 25 knots increasing to 20 to
30 knots after midnight. Heavy freezing spray after midnight.
Waves building to 5 to 8 feet occasionally to 10 feet.
.WEDNESDAY...West gales to 35 knots. Heavy freezing spray. Waves
building to 8 to 11 feet occasionally to 14 feet.
.WEDNESDAY NIGHT...West gales to 35 knots. Freezing spray after
midnight. Waves subsiding to 5 to 8 feet occasionally to 10 feet.
.THURSDAY...West winds 15 to 25 knots diminishing to 10 to
20 knots. Waves subsiding to 1 to 3 feet.
.FRIDAY...Southwest winds 5 to 15 knots increasing to 10 to
20 knots. A chance of snow. Waves subsiding to calm to 2 feet,
then building to 1 to 3 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ264-151100-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
951 PM EST Sun Jan 14 2018

.REST OF TONIGHT...South winds 15 to 25 knots diminishing to
10 to 20 knots and turning southeast late. Freezing spray late in
the evening. Snow. Waves 3 to 6 feet occasionally to 8 feet
subsiding to 1 to 3 feet.
.MONDAY...Southeast winds 15 to 25 knots backing east. Freezing
spray in the morning. Snow showers. Waves building to 4 to 8 feet
occasionally to 10 feet.
.MONDAY NIGHT...Northeast winds 15 to 25 knots. Freezing spray.
Numerous snow showers. Waves building to 4 to 8 feet occasionally
to 10 feet.
.TUESDAY...North winds 15 to 25 knots becoming northwest 5 to
15 knots in the afternoon. Freezing spray in the morning.
Scattered snow showers. Waves subsiding to 1 to 3 feet.
.TUESDAY NIGHT...West winds 15 to 25 knots increasing to gales to
35 knots after midnight. Scattered snow showers. Freezing spray
after midnight. Waves building to 6 to 9 feet occasionally to
11 feet.
.WEDNESDAY...West gales to 35 knots. Freezing spray. Waves
building to 9 to 12 feet occasionally to 15 feet.
.WEDNESDAY NIGHT...West gales to 35 knots diminishing to 20 to
30 knots after midnight. Waves subsiding to 5 to 8 feet
occasionally to 10 feet.
.THURSDAY...West winds 15 to 25 knots diminishing to 10 to
20 knots. Waves subsiding to 1 to 3 feet.
.FRIDAY...Southwest winds 5 to 15 knots becoming south 10 to
20 knots. A chance of snow, possibly mixed with rain. Waves
subsiding to calm to 2 feet, then building to 1 to 3 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ265-151100-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
951 PM EST Sun Jan 14 2018

.REST OF TONIGHT...South winds 20 to 30 knots diminishing to
10 to 20 knots and turning southeast late. Snow showers. Waves 3
to 5 feet occasionally to 7 feet subsiding to 1 to 3 feet.
.MONDAY...Southeast winds 15 to 25 knots backing east by mid
afternoon. Freezing spray in the morning. Snow showers. Waves
building to 4 to 7 feet occasionally to 9 feet, then subsiding to
3 to 6 feet occasionally to 8 feet.
.MONDAY NIGHT...East winds 20 to 30 knots backing northwest by
midnight. Freezing spray. Snow showers. Waves building to 4 to 7
feet occasionally to 9 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet.
.TUESDAY...North winds 15 to 25 knots backing northwest in the
afternoon. Freezing spray in the morning. Numerous snow showers.
Waves subsiding to 2 to 4 feet.
.TUESDAY NIGHT...West winds 15 to 25 knots increasing to 20 to
30 knots after midnight. Scattered snow showers. Waves building
to 3 to 6 feet occasionally to 8 feet.
.WEDNESDAY...West winds 20 to 30 knots increasing to gales to
35 knots in the afternoon. Freezing spray. Waves building to 4 to
7 feet occasionally to 9 feet.
.WEDNESDAY NIGHT...West gales to 35 knots diminishing to 20 to
30 knots after midnight. Freezing spray in the evening. Waves
4 to 7 feet occasionally to 9 feet.
.THURSDAY...West winds 15 to 25 knots. Waves subsiding to 3 to
6 feet occasionally to 8 feet.
.FRIDAY...Southwest winds 10 to 20 knots. Waves subsiding to 3 to
5 feet occasionally to 7 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ266-151100-
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-
951 PM EST Sun Jan 14 2018

.REST OF TONIGHT...South winds 20 to 30 knots backing southeast
late. Freezing spray. Snow. Waves 5 to 8 feet occasionally to 10
feet.
.MONDAY...Southeast winds 20 to 30 knots backing east by mid
afternoon. Freezing spray in the morning. Snow showers. Waves
subsiding to 4 to 8 feet occasionally to 10 feet.
.MONDAY NIGHT...East winds 15 to 25 knots backing northeast by
midnight. Numerous snow showers in the evening, then scattered
snow showers after midnight. Freezing spray after midnight. Waves
subsiding to 3 to 6 feet occasionally to 8 feet, then building to
4 to 7 feet occasionally to 9 feet.
.TUESDAY...Northeast winds 15 to 25 knots becoming north 10 to
20 knots in the afternoon. Freezing spray in the morning.
Scattered snow showers. Waves subsiding to 2 to 4 feet.
.TUESDAY NIGHT...West winds 15 to 25 knots increasing to gales to
35 knots after midnight. Scattered snow showers. Freezing spray
after midnight. Waves building to 6 to 9 feet occasionally to
11 feet.
.WEDNESDAY...West gales to 35 knots. Freezing spray. Waves
building to 10 to 14 feet occasionally to 18 feet, then subsiding
to 9 to 12 feet occasionally to 15 feet.
.WEDNESDAY NIGHT...West gales to 35 knots. Waves subsiding to
5 to 8 feet occasionally to 10 feet.
.THURSDAY...West winds 15 to 25 knots. Waves subsiding to 1 to
3 feet.
.FRIDAY...Southwest winds 15 to 25 knots backing south. A chance
of rain. Waves building to 2 to 4 feet, then subsiding to 1 to
3 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ267-151100-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
951 PM EST Sun Jan 14 2018

.REST OF TONIGHT...South winds 20 to 30 knots backing southeast
late. Snow. Freezing spray after midnight. Waves 3 to 6 feet
occasionally to 8 feet.
.MONDAY...Southeast winds 20 to 30 knots backing east by mid
afternoon. Freezing spray in the morning. Scattered snow showers.
Waves building to 4 to 7 feet occasionally to 9 feet, then
subsiding to 3 to 5 feet occasionally to 7 feet.
.MONDAY NIGHT...East winds 15 to 25 knots backing northeast late.
Scattered snow showers. Waves subsiding to 2 to 4 feet.
.TUESDAY...Northeast winds 10 to 20 knots backing north in the
afternoon. Scattered snow showers. Waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 1 to 3 feet.
.TUESDAY NIGHT...Northwest winds 10 to 20 knots becoming west
20 to 30 knots after midnight. Numerous snow showers in the
evening, then scattered snow showers after midnight. Freezing
spray after midnight. Waves building to 4 to 7 feet occasionally
to 9 feet.
.WEDNESDAY...West winds 20 to 30 knots. Scattered snow showers in
the morning. Freezing spray. Waves building to 7 to 10 feet
occasionally to 13 feet.
.WEDNESDAY NIGHT...West winds 20 to 30 knots. Waves subsiding to
5 to 8 feet occasionally to 10 feet.
.THURSDAY...Southwest winds 15 to 25 knots. A chance of snow.
Waves subsiding to 1 to 3 feet.
.FRIDAY...Southwest winds 15 to 25 knots. A chance of snow. A
chance of rain. Waves building to 2 to 4 feet, then subsiding to
1 to 3 feet.

Note, wave height forecasts are for ice free areas.

$$
LSZ261-151100-
MAFOR 1504/
Superior West 11537 11617 11117 11227 12137 12147. Freezing spray
Monday evening. Snow showers. Waves 1 to 3 feet overnight
building to 5 to 8 feet Monday.

Superior North Central 11437 11427 11327 11347 11337 11237 11247
11147. Freezing spray. Snow showers. Waves 2 to 4 feet overnight
building to 4 to 7 feet Monday evening.

Superior South Central 11447 11427 12347 11337 13237. Freezing
spray. Snow showers. Waves 3 to 6 feet.

Superior East 11447 11347 12340 11347 11247 11237 11230. Freezing
spray. Scattered snow showers. Waves 4 to 7 feet.

$$

Borchardt

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.