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 072108
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
408 PM EST Thu Dec 7 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 of 29.7 inches will develop overnight near
eastern Lake Superior and a deepening secondary low of 29.7 inches
swings south across the western Great Lakes Friday evening. A high
of 30.3 inches in the central Plains will extend a 30 inch ridge
into the upper Midwest late Saturday before two additional low
pressure systems both of 29.7 inches move through the upper Great
Lakes Sunday and Monday. A high of 30.2 inches will then build
into the Great Lakes Tuesday in advance of several additional low
pressure systems due to pass through late next week.

LSZ162-080515-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
408 PM EST Thu Dec 7 2017 /308 PM CST Thu Dec 7 2017/

...GALE WARNING IN EFFECT UNTIL MIDNIGHT EST /11 PM CST/
TONIGHT...

.LATE THIS AFTERNOON...West gales to 35 knots. A slight chance of
snow showers. Waves 5 to 8 feet occasionally to 10 feet.
.TONIGHT...West gales to 35 knots diminishing to 20 to 30 knots
by midnight, then becoming northwest 15 to 25 knots late. A
slight chance of snow showers. Waves subsiding to 2 to 4 feet.
.FRIDAY...Northwest winds 15 to 25 knots diminishing to 5 to
15 knots. A chance of snow showers. Waves subsiding to calm to
2 feet.
.FRIDAY NIGHT...North winds 15 to 25 knots increasing to 20 to
30 knots late. A chance of snow showers. Waves building to 3 to
5 feet occasionally to 7 feet.
.SATURDAY...North winds 15 to 25 knots becoming northwest 10 to
20 knots in the afternoon. A slight chance of snow showers. Waves
subsiding to calm to 2 feet.
.SATURDAY NIGHT...West winds 10 to 20 knots increasing to 15 to
25 knots after midnight. Waves building to 2 to 4 feet.
.SUNDAY...Northwest winds 15 to 25 knots diminishing to 10 to
20 knots in the afternoon. Waves subsiding to calm to 2 feet.
.SUNDAY NIGHT...North winds 10 to 20 knots veering northeast
after midnight. A chance of snow showers. Waves calm to 2 feet.
.MONDAY...North winds 15 to 25 knots. A chance of snow showers.
Waves building to 3 to 5 feet occasionally to 7 feet, then
subsiding to 1 to 3 feet.
.TUESDAY...West winds 10 to 20 knots becoming north 15 to
25 knots. A chance of snow showers. Waves subsiding to calm to
2 feet.

$$

LSZ263-080515-
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-
408 PM EST Thu Dec 7 2017

...GALE WARNING IN EFFECT UNTIL MIDNIGHT EST TONIGHT...

.LATE THIS AFTERNOON...West gales to 35 knots. A chance of snow
showers. Waves 6 to 9 feet occasionally to 11 feet building to
7 to 10 feet occasionally to 13 feet.
.TONIGHT...West gales to 35 knots becoming northwest 20 to
30 knots by midnight. A chance of snow showers. Waves subsiding
to 3 to 6 feet occasionally to 8 feet.
.FRIDAY...Northwest winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. A chance of snow showers. Waves
subsiding to 1 to 3 feet.
.FRIDAY NIGHT...North winds 10 to 20 knots increasing to 15 to
25 knots late. Snow showers likely in the evening, then a chance
of snow showers after midnight. Waves building to 3 to 5 feet
occasionally to 7 feet.
.SATURDAY...North winds 15 to 25 knots becoming northwest 10 to
20 knots in the afternoon. A chance of snow showers. Waves
building to 3 to 6 feet occasionally to 8 feet, then subsiding to
1 to 3 feet.
.SATURDAY NIGHT...West winds 10 to 20 knots increasing to 15 to
25 knots after midnight. A chance of snow showers. Waves building
to 3 to 5 feet occasionally to 7 feet.
.SUNDAY...Northwest winds 15 to 25 knots veering north in the
afternoon. A chance of snow showers. Waves subsiding to 2 to
4 feet.
.SUNDAY NIGHT...North winds 15 to 25 knots becoming northeast
5 to 15 knots after midnight. A chance of snow showers. Waves
subsiding to calm to 2 feet.
.MONDAY...North winds 15 to 25 knots. A chance of snow showers.
Waves building to 3 to 5 feet occasionally to 7 feet, then
subsiding to 2 to 4 feet.
.TUESDAY...Northwest winds 10 to 20 knots veering north. A chance
of snow showers. Waves subsiding to 1 to 3 feet, then building to
2 to 4 feet.

$$

LSZ264-080515-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
408 PM EST Thu Dec 7 2017

.LATE THIS AFTERNOON...West gales to 35 knots. Snow showers
likely. Waves 5 to 9 feet occasionally to 11 feet.
.TONIGHT...Northwest gales to 35 knots diminishing to 15 to
25 knots by midnight, then increasing to 20 to 30 knots late. A
chance of snow showers. 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.
.FRIDAY...Northwest winds 20 to 30 knots diminishing to 10 to
20 knots. Freezing spray in the morning. A chance of snow
showers. Waves subsiding to 2 to 4 feet.
.FRIDAY NIGHT...North winds 10 to 20 knots increasing to 15 to
25 knots late. Snow showers likely in the evening, then a chance
of snow showers after midnight. Waves subsiding to 1 to 3 feet,
then building to 3 to 5 feet occasionally to 7 feet.
.SATURDAY...North winds 15 to 25 knots becoming northwest 10 to
20 knots in the afternoon. A chance of snow showers. Waves
building to 3 to 6 feet occasionally to 8 feet, then subsiding to
2 to 4 feet.
.SATURDAY NIGHT...West winds 10 to 20 knots increasing to 15 to
25 knots after midnight. A chance of snow showers. Waves building
to 3 to 5 feet occasionally to 7 feet.
.SUNDAY...Northwest winds 15 to 25 knots becoming north 20 to
30 knots in the afternoon. A chance of snow showers. Waves 3 to
5 feet occasionally to 7 feet.
.SUNDAY 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.
.MONDAY...North winds 15 to 25 knots. A chance of snow showers.
Waves building to 3 to 6 feet occasionally to 8 feet.
.TUESDAY...Northwest winds 10 to 20 knots veering north. A chance
of snow showers. Waves subsiding to 1 to 3 feet, then building to
2 to 4 feet.

$$

LSZ265-080515-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
408 PM EST Thu Dec 7 2017

...GALE WARNING IN EFFECT UNTIL MIDNIGHT EST TONIGHT...

.LATE THIS AFTERNOON...West gales to 35 knots. Snow showers
likely. Waves 4 to 7 feet occasionally to 9 feet.
.TONIGHT...West gales to 35 knots becoming northwest 20 to
30 knots by midnight. Snow showers likely in the evening, then a
chance of snow showers after midnight. Waves subsiding to 3 to
6 feet occasionally to 8 feet.
.FRIDAY...Northwest winds 20 to 30 knots with a few gale force
gusts to 35 knots diminishing to 15 to 25 knots. Freezing spray
in the morning. A chance of snow showers in the morning, then snow
showers likely in the afternoon. Waves building to 4 to 7 feet
occasionally to 9 feet, then subsiding to 2 to 4 feet.
.FRIDAY NIGHT...North winds 15 to 25 knots. Snow showers. Waves
subsiding to 1 to 3 feet, then building to 3 to 5 feet
occasionally to 7 feet.
.SATURDAY...North winds 20 to 30 knots becoming northwest 15 to
25 knots in the afternoon. Freezing spray in the morning. Snow
showers likely in the morning, then a chance of snow showers in
the afternoon. Waves building to 3 to 6 feet occasionally to
8 feet.
.SATURDAY NIGHT...West winds 15 to 25 knots. A chance of snow
showers. Waves subsiding to 2 to 4 feet.
.SUNDAY...West winds 20 to 30 knots veering northwest in the
afternoon. A chance of snow showers. Waves building to 3 to
5 feet occasionally to 7 feet.
.SUNDAY NIGHT...North winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. Snow showers likely. Waves subsiding to
1 to 3 feet.
.MONDAY...North winds 10 to 20 knots increasing to 20 to
30 knots. Snow showers likely. Freezing spray. Waves subsiding to
calm to 2 feet, then building to 3 to 6 feet occasionally to
8 feet.
.TUESDAY...Northwest winds 15 to 25 knots. A chance of snow
showers. Waves subsiding to 1 to 3 feet.

$$

LSZ266-080515-
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-
408 PM EST Thu Dec 7 2017

...GALE WARNING IN EFFECT UNTIL MIDNIGHT EST TONIGHT...

.LATE THIS AFTERNOON...West gales to 35 knots. Snow showers.
Waves 5 to 8 feet occasionally to 10 feet.
.TONIGHT...Northwest gales to 35 knots diminishing to 20 to
30 knots by midnight with a few gale force gusts to 35 knots
late. Snow showers likely. Waves building to 6 to 9 feet
occasionally to 11 feet, then subsiding to 4 to 7 feet
occasionally to 9 feet.
.FRIDAY...Northwest winds 20 to 30 knots diminishing to 15 to
25 knots by mid afternoon. Freezing spray. A chance of snow
showers in the morning. Snow showers likely in the afternoon.
Waves building to 5 to 8 feet occasionally to 10 feet, then
subsiding to 3 to 6 feet occasionally to 8 feet.
.FRIDAY NIGHT...North winds 15 to 25 knots. Snow showers. Waves
subsiding to 2 to 4 feet, then building to 3 to 5 feet
occasionally to 7 feet.
.SATURDAY...North winds 20 to 30 knots becoming northwest 15 to
25 knots in the afternoon. Freezing spray. A chance of snow
showers. Waves building to 3 to 6 feet occasionally to 8 feet.
.SATURDAY NIGHT...Northwest winds 15 to 25 knots backing west
after midnight. A chance of snow showers in the evening, then
snow showers likely after midnight. Waves 3 to 5 feet
occasionally to 7 feet.
.SUNDAY...West winds 20 to 30 knots veering north in the
afternoon. Snow showers likely in the morning, then a chance of
snow showers in the afternoon. Waves building to 3 to 6 feet
occasionally to 8 feet.
.SUNDAY NIGHT...North 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 subsiding to 1 to
3 feet.
.MONDAY...North winds 10 to 20 knots increasing to 20 to
30 knots. Snow showers likely, then a chance of snow showers.
Freezing spray. Waves subsiding to calm to 2 feet, then building
to 4 to 7 feet occasionally to 9 feet.
.TUESDAY...North winds 15 to 25 knots veering east. A chance of
snow showers. Waves subsiding to 1 to 3 feet.

$$

LSZ267-080515-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
408 PM EST Thu Dec 7 2017

.LATE THIS AFTERNOON...West gales to 35 knots. Snow showers.
Waves 5 to 8 feet occasionally to 10 feet.
.TONIGHT...West gales to 35 knots becoming northwest 20 to
30 knots by midnight. Snow showers likely in the evening, then
snow showers after midnight. Waves building to 6 to 9 feet
occasionally to 11 feet, then subsiding to 4 to 7 feet
occasionally to 9 feet.
.FRIDAY...Northwest winds 20 to 30 knots diminishing to 15 to
25 knots by mid afternoon. Freezing spray in the morning. Snow
showers likely. Waves building to 5 to 8 feet occasionally to
10 feet, then subsiding to 3 to 6 feet occasionally to 8 feet.
.FRIDAY NIGHT...North winds 10 to 20 knots veering northeast by
midnight, then becoming north 15 to 25 knots late. Snow showers
likely. Waves subsiding to 1 to 3 feet, then building to 2 to
4 feet.
.SATURDAY...North winds 15 to 25 knots. A chance of snow showers.
Waves building to 3 to 5 feet occasionally to 7 feet, then
subsiding to 2 to 4 feet.
.SATURDAY NIGHT...Northwest winds 10 to 20 knots backing west
after midnight. A chance of snow showers in the evening, then
snow showers likely after midnight. Waves building to 3 to 5 feet
occasionally to 7 feet.
.SUNDAY...West winds 15 to 25 knots becoming northwest 20 to
30 knots in the afternoon. Snow showers likely in the morning,
then a chance of snow showers in the afternoon. Waves building to
3 to 6 feet occasionally to 8 feet.
.SUNDAY NIGHT...North winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. A chance of snow showers. Waves
subsiding to calm to 2 feet.
.MONDAY...North winds 10 to 20 knots increasing to 15 to
25 knots. Snow showers likely. Waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 2 to 4 feet.
.TUESDAY...North winds 15 to 25 knots becoming east 10 to
20 knots. A chance of snow showers. Waves subsiding to 1 to
3 feet.

$$

LSZ261-080515-
MAFOR 0722/
Superior West...Gale Warning in effect...12650 13740 12730 11720.
Freezing spray early this evening. Chance of snow showers this
evening and Friday afternoon. Waves 5 to 8 feet subsiding to 3 to
6 feet tonight. Waves 1 to 5 feet Friday.

Superior North Central 11747 15740 11730. Freezing spray late.
Chance of snow showers tonight through mid morning, then again
late Fiday. Freezing spray through mid morning. Waves 3 to 7 feet
tonight, subsiding to 2 to 4 feet Friday.

Superior South Central...Gale Warning in effect...12657 11647
11747 13740 11730. Freezing spray through early afternoon. Chance
of snow showers Friday. Waves 3 to 7 feet.

Superior East...11647 15747 11737. Freezing spray through early
afternoon Friday. Waves 5 to 8 feet.

$$

KCW

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.