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
389
FZUS63 KMQT 140909
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
409 AM 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 high pressure system of 30.8 inches over Wisconsin
and Illinois early this morning will drift to the Ohio River
Valley by this afternoon and New England tonight. A 30.2 inch
trough over the northern Plains this afternoon will consolidate
into a low over the western Great Lakes by Monday morning and then
drift to the eastern Great Lakes through Tuesday. A 30.7 inch
high over the central Plains on Tuesday will extend a 30.5 inch
ridge across Lake Superior Tuesday night before the high reaches
the Ohio River Valley Wednesday night. A 29.9 inch trough will
stretch west to east across far northern Ontario Wednesday and
Thursday.

LSZ162-141715-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
409 AM EST Sun Jan 14 2018 /309 AM CST Sun Jan 14 2018/

.EARLY THIS MORNING...Southwest winds 15 to 25 knots. Isolated
snow showers. Waves 1 to 3 feet building to 2 to 4 feet.
.TODAY...Southwest winds 15 to 25 knots becoming south 20 to
30 knots. Scattered snow showers in the morning, then snow
showers in the afternoon. Freezing spray in the afternoon. Waves
building to 3 to 6 feet occasionally to 8 feet.
.TONIGHT...South winds 15 to 25 knots veering southwest by
midnight, then becoming north 10 to 20 knots late. Numerous snow
showers in the evening, then scattered snow showers after
midnight. Waves subsiding to calm to 2 feet.
.MONDAY...North winds 10 to 20 knots veering northeast by late
morning, then increasing to 15 to 25 knots by mid afternoon. A
chance of snow showers in the morning, then snow showers likely
in the afternoon. Waves building to 3 to 5 feet occasionally to
7 feet.
.MONDAY NIGHT...North winds 20 to 30 knots diminishing to 15 to
25 knots after midnight. Freezing spray. Snow showers likely in
the evening. A chance of 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.
.TUESDAY...North winds 10 to 20 knots becoming northwest 5 to
15 knots in the afternoon. A chance of snow showers. Waves
subsiding to calm to 2 feet.
.TUESDAY NIGHT...West winds 5 to 15 knots increasing to 15 to
25 knots after midnight. Waves building to 3 to 5 feet
occasionally to 7 feet.
.WEDNESDAY...West winds 20 to 30 knots. Freezing spray. Waves
building to 4 to 7 feet occasionally to 9 feet, then subsiding to
3 to 5 feet occasionally to 7 feet.
.THURSDAY...Southwest winds 15 to 25 knots. Waves subsiding to
1 to 3 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ263-141715-
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-
409 AM EST Sun Jan 14 2018

.EARLY THIS MORNING...Southwest winds 15 to 25 knots. Scattered
snow showers. Waves 2 to 4 feet.
.TODAY...Southwest winds 15 to 25 knots increasing to 20 to
30 knots by late morning, then backing south by mid afternoon.
Freezing spray. Scattered snow showers. Waves building to 3 to
6 feet occasionally to 8 feet.
.TONIGHT...South winds 20 to 30 knots diminishing to 5 to
15 knots. Freezing spray in the evening. Snow showers. Waves
subsiding to 1 to 3 feet.
.MONDAY...East winds 10 to 20 knots becoming northeast 15 to
25 knots by mid afternoon. 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 3 to 6 feet
occasionally to 8 feet.
.MONDAY NIGHT...Northeast winds 20 to 30 knots backing north
after midnight. Freezing spray. Snow showers. Waves building to
5 to 9 feet occasionally to 11 feet.
.TUESDAY...North winds 10 to 20 knots becoming northwest 5 to
15 knots in the afternoon. Freezing spray in the morning. A
chance of snow showers. Waves subsiding to 1 to 3 feet.
.TUESDAY NIGHT...West winds 10 to 20 knots increasing to 15 to
25 knots after midnight. Waves building to 3 to 6 feet
occasionally to 8 feet.
.WEDNESDAY...West winds 20 to 30 knots. Freezing spray. Waves
building to 6 to 9 feet occasionally to 11 feet, then subsiding
to 4 to 7 feet occasionally to 9 feet.
.THURSDAY...Southwest winds 15 to 25 knots veering west. Waves
subsiding to 1 to 3 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ264-141715-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
409 AM EST Sun Jan 14 2018

.EARLY THIS MORNING...West winds 15 to 25 knots. Scattered snow
showers. Waves 2 to 4 feet.
.TODAY...Southwest winds 15 to 25 knots increasing to 20 to
30 knots by late morning, then becoming south 15 to 25 knots by
mid afternoon. Freezing spray. Scattered snow showers. Waves
building to 3 to 6 feet occasionally to 8 feet.
.TONIGHT...South winds 20 to 30 knots diminishing to 5 to
15 knots. Freezing spray in the evening. Snow showers. Waves
building to 3 to 6 feet occasionally to 8 feet, then subsiding to
1 to 3 feet.
.MONDAY...Southeast winds 15 to 25 knots backing east. Snow
showers likely. Freezing spray in the afternoon. Waves building
to 4 to 7 feet occasionally to 9 feet.
.MONDAY NIGHT...Northeast winds 15 to 25 knots. Freezing spray.
Snow showers in the evening. A chance of snow showers after
midnight. Waves 4 to 7 feet occasionally to 9 feet.
.TUESDAY...North winds 15 to 25 knots diminishing to 5 to
15 knots in the afternoon. Freezing spray in the morning. A
chance of 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 gales to 35 knots diminishing to 20 to
30 knots. Freezing spray. Waves building to 8 to 11 feet
occasionally to 14 feet, then subsiding to 4 to 7 feet
occasionally to 9 feet.
.THURSDAY...West winds 15 to 25 knots. Waves subsiding to 1 to
3 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ265-141715-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
409 AM EST Sun Jan 14 2018

.EARLY THIS MORNING...West winds 15 to 25 knots. Waves 2 to
4 feet.
.TODAY...Southwest winds 15 to 25 knots backing south by mid
afternoon. Scattered snow showers in the afternoon. Waves
subsiding to 1 to 3 feet, then building to 2 to 4 feet.
.TONIGHT...South winds 20 to 30 knots diminishing to 10 to
20 knots. Snow showers. Waves building to 3 to 5 feet
occasionally to 7 feet, then 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 likely.
Waves building to 3 to 6 feet occasionally to 8 feet.
.MONDAY NIGHT...East winds 15 to 25 knots backing northeast after
midnight. Freezing spray. Snow showers likely. Waves building to
3 to 6 feet occasionally to 8 feet.
.TUESDAY...North winds 15 to 25 knots diminishing to 10 to
20 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 subsiding to 2 to 4 feet.
.TUESDAY NIGHT...West winds 10 to 20 knots increasing to 15 to
25 knots after midnight. A chance of snow showers. Waves
subsiding to 1 to 3 feet, then building to 2 to 4 feet.
.WEDNESDAY...West winds 20 to 30 knots. Heavy freezing spray.
Waves building to 4 to 7 feet occasionally to 9 feet.
.THURSDAY...West winds 15 to 25 knots. Waves subsiding to 3 to
5 feet occasionally to 7 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ266-141715-
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-
409 AM EST Sun Jan 14 2018

.EARLY THIS MORNING...West winds 15 to 25 knots. Isolated snow
showers. Waves 3 to 5 feet occasionally to 7 feet.
.TODAY...Southwest winds 15 to 25 knots increasing to 20 to
30 knots by late morning, then becoming south by mid afternoon. A
few gale force gusts to 35 knots in the afternoon. Isolated snow
showers. Freezing spray in the afternoon. Waves building to 4 to 7
feet occasionally to 9 feet.
.TONIGHT...South winds 20 to 30 knots. A few gale force gusts to
35 knots in the evening. Freezing spray. Snow showers. Waves
building to 4 to 8 feet occasionally to 10 feet.
.MONDAY...Southeast winds 15 to 25 knots backing east by mid
afternoon. Freezing spray in the morning. Snow showers likely.
Waves subsiding to 3 to 6 feet occasionally to 8 feet.
.MONDAY NIGHT...East winds 15 to 25 knots backing northeast after
midnight. Freezing spray. Snow showers likely in the evening. A
chance of snow showers after midnight. Waves 3 to 6 feet
occasionally to 8 feet.
.TUESDAY...Northeast winds 15 to 25 knots becoming north 10 to
20 knots in the afternoon. Freezing spray in the morning. A
chance of snow showers. Waves subsiding to 2 to 4 feet.
.TUESDAY NIGHT...Northwest winds 15 to 25 knots becoming west
20 to 30 knots after midnight. A chance of snow showers. Waves
subsiding to 1 to 3 feet, then building to 3 to 6 feet
occasionally to 8 feet.
.WEDNESDAY...West gales to 35 knots diminishing to 20 to
30 knots. Freezing spray. A chance of snow showers. Waves
building to 8 to 11 feet occasionally to 14 feet, then subsiding
to 5 to 8 feet occasionally to 10 feet.
.THURSDAY...West winds 15 to 25 knots. Waves subsiding to 2 to
4 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ267-141715-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
409 AM EST Sun Jan 14 2018

.EARLY THIS MORNING...West winds 15 to 25 knots. Freezing spray.
Scattered snow showers. Waves 3 to 5 feet occasionally to 7 feet.
.TODAY...Southwest winds 20 to 30 knots becoming south by mid
afternoon. A few gale force gusts to 35 knots in the afternoon.
Freezing spray. Scattered snow showers. Waves building to 4 to 7
feet occasionally to 9 feet.
.TONIGHT...South winds 20 to 30 knots becoming southeast late.
A few gale force gusts to 35 knots. Freezing spray. Snow showers.
Waves subsiding to 3 to 6 feet occasionally to 8 feet, then
building to 4 to 7 feet occasionally to 9 feet.
.MONDAY...Southeast winds 20 to 30 knots backing east by mid
afternoon. Freezing spray in the morning. A chance of snow
showers. Waves subsiding to 3 to 5 feet occasionally to 7 feet.
.MONDAY NIGHT...East winds 15 to 25 knots backing northeast after
midnight. A chance of snow showers. Waves subsiding to 1 to
3 feet, then building to 2 to 4 feet.
.TUESDAY...Northeast winds 15 to 25 knots becoming north 10 to
20 knots in the afternoon. A chance of snow showers. Waves
subsiding to 1 to 3 feet.
.TUESDAY NIGHT...Northwest winds 10 to 20 knots becoming west
15 to 25 knots after midnight. A chance of snow showers. Waves
building to 3 to 5 feet occasionally to 7 feet.
.WEDNESDAY...West winds 20 to 30 knots. Freezing spray. A chance
of snow showers. Waves building to 7 to 10 feet occasionally to
13 feet, then subsiding to 5 to 8 feet occasionally to 10 feet.
.THURSDAY...Southwest winds 15 to 25 knots. A chance of snow
showers. Waves subsiding to 2 to 4 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ261-141715-
MAFOR 1410/
Superior West 11530 11540 11542 13447 11537 11620. Freezing spray.
Scattered snow showers early this afternoon. Scattered snow
showers late tonight. Waves 2 to 4 feet building to 3 to 6 feet
today. Waves 3 to 5 feet subsiding to 1 to 3 feet tonight.

Superior North Central 11630 12540 12440 11447 11437 11427.
Freezing spray. Scattered snow showers this morning. Scattered
snow showers late today. Waves 1 to 3 feet building to 3 to 6
feet today. Waves 3 to 6 feet subsiding to 2 to 4 feet tonight.

Superior South Central 11630 12530 12440 12447 11427. Freezing
spray this evening. Scattered snow showers through early this
evening. Waves 2 to 4 feet building to 3 to 5 feet today. Waves 3
to 6 feet subsiding to 1 to 3 feet tonight.

Superior East 11630 11530 11540 11440 11440 13447. Freezing spray
this afternoon through tonight. Scattered snow showers this
morning. Waves 3 to 6 feet building to 4 to 7 feet today. Waves 5
to 8 feet tonight.

$$

KEC

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.