Great Lakes Forecast
Issued by NWS

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary Off
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 131455
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
955 AM EST Sat Jan 13 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 Iowa and
southern Minnesota late this morning will reach the Ohio River
Valley by Sunday, with a 30.5 inch ridge extending across Lake
Superior tonight and Quebec by Sunday night. A 30.1 inch trough
will move over the western Great Lakes Monday as a 31.0 inch high
moves into the northern Plains. The trough will move over the
eastern Great Lakes Tuesday as the high slowly slides southeast,
reaching the lower Mississippi Valley late Wednesday.

LSZ162-132300-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
955 AM EST Sat Jan 13 2018 /855 AM CST Sat Jan 13 2018/

.REST OF TODAY...Northwest winds 10 to 20 knots backing west.
Isolated snow showers. Waves 1 to 3 feet.
.TONIGHT...West winds 10 to 20 knots backing southwest late.
Isolated snow showers. Waves 1 to 3 feet.
.SUNDAY...Southwest winds 15 to 25 knots increasing to 20 to
30 knots by mid afternoon. Isolated snow showers in the morning,
then snow showers in the afternoon. Waves building to 3 to 6 feet
occasionally to 8 feet.
.SUNDAY NIGHT...Southwest winds 15 to 25 knots becoming north
10 to 20 knots after midnight. Numerous snow showers in the
evening, then scattered snow showers after midnight. Waves
subsiding to calm to 2 feet, then building to 1 to 3 feet.
.MONDAY...North winds 15 to 25 knots increasing to 20 to 30 knots
in the afternoon. Scattered snow showers. Waves building to 3 to
5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet.
.MONDAY NIGHT...North winds 20 to 30 knots diminishing to 15 to
25 knots after midnight. Heavy freezing spray in the evening.
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.
.TUESDAY...Northwest winds 10 to 20 knots becoming west 15 to
25 knots. Scattered snow showers. Waves subsiding to calm to
2 feet, then building to 3 to 5 feet occasionally to 7 feet.
.WEDNESDAY...West winds 15 to 25 knots. Heavy freezing spray.
Waves building to 3 to 6 feet occasionally to 8 feet, then
subsiding to calm to 2 feet.

Note, wave height forecasts are for ice free areas.

$$

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-
955 AM EST Sat Jan 13 2018

.REST OF TODAY...Northwest winds 15 to 25 knots backing west by
mid afternoon. Scattered snow showers. Waves 2 to 4 feet building
to 3 to 5 feet occasionally to 7 feet.
.TONIGHT...Northwest winds 15 to 25 knots becoming west 10 to
20 knots by midnight. Scattered snow showers. Waves subsiding to
2 to 4 feet.
.SUNDAY...Southwest winds 15 to 25 knots becoming south 20 to
30 knots by mid afternoon. Isolated snow showers in the morning,
then numerous snow showers in the afternoon. Freezing spray in
the afternoon. Waves building to 4 to 7 feet occasionally to
9 feet, then subsiding to 3 to 6 feet occasionally to 8 feet.
.SUNDAY NIGHT...South winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. Freezing spray in the evening. Numerous
snow showers. Waves subsiding to 1 to 3 feet.
.MONDAY...North winds 10 to 20 knots increasing to 20 to 30 knots
in the afternoon. Snow showers. Freezing spray in the afternoon.
Waves subsiding to calm to 2 feet, then building to 4 to 7 feet
occasionally to 9 feet.
.MONDAY NIGHT...North winds 20 to 30 knots. Heavy freezing spray.
Snow showers. Waves building to 4 to 8 feet occasionally to
10 feet.
.TUESDAY...North winds 10 to 20 knots becoming west 15 to
25 knots. Snow showers. Waves subsiding to 1 to 3 feet, then
building to 3 to 6 feet occasionally to 8 feet.
.WEDNESDAY...West winds 20 to 30 knots. Freezing spray. Waves
building to 4 to 7 feet occasionally to 9 feet, then subsiding to
1 to 3 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ264-132300-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
955 AM EST Sat Jan 13 2018

.REST OF TODAY...Northwest winds 15 to 25 knots diminishing to
10 to 20 knots. Scattered snow showers. Waves 3 to 6 feet
occasionally to 8 feet.
.TONIGHT...Northwest winds 10 to 20 knots diminishing to 5 to
15 knots by midnight, then backing west late. Scattered snow
showers. Waves subsiding to 1 to 3 feet.
.SUNDAY...Southwest winds 15 to 25 knots backing south by mid
afternoon. Scattered snow showers. Waves building to 3 to 6 feet
occasionally to 8 feet.
.SUNDAY NIGHT...South winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. Numerous snow showers. Waves subsiding
to 1 to 3 feet.
.MONDAY...Southeast winds 5 to 15 knots becoming northeast 15 to
25 knots in the afternoon. Snow showers. Waves subsiding to calm
to 2 feet, then building to 3 to 6 feet occasionally to 8 feet.
.MONDAY NIGHT...North winds 20 to 30 knots. Heavy freezing spray.
Snow showers. Waves building to 4 to 8 feet occasionally to
10 feet.
.TUESDAY...North winds 15 to 25 knots backing west. Heavy
freezing spray. Snow showers, then scattered snow showers. Waves
subsiding to 1 to 3 feet, then building to 4 to 7 feet
occasionally to 9 feet.
.WEDNESDAY...West gales to 35 knots becoming northwest 20 to
30 knots. Freezing spray. Waves building to 6 to 9 feet
occasionally to 11 feet, then subsiding to 2 to 4 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ265-132300-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
955 AM EST Sat Jan 13 2018

.REST OF TODAY...Northwest winds 15 to 25 knots. Freezing spray
late in the morning. Isolated snow showers. Waves 4 to 7 feet
occasionally to 9 feet subsiding to 3 to 6 feet occasionally to 8
feet.
.TONIGHT...West winds 15 to 25 knots diminishing to 10 to
20 knots by midnight, then increasing to 15 to 25 knots late.
Scattered snow showers. Waves subsiding to 1 to 3 feet.
.SUNDAY...Southwest winds 10 to 20 knots increasing to 15 to
25 knots by late morning, then becoming south 20 to 30 knots by
mid afternoon. Isolated snow showers in the afternoon. Waves
building to 2 to 4 feet, then subsiding to 1 to 3 feet.
.SUNDAY NIGHT...South winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. Snow showers. Waves building to 3 to
5 feet occasionally to 7 feet, then subsiding to calm to 2 feet.
.MONDAY...East winds 5 to 15 knots becoming northeast 10 to
20 knots in the afternoon. Snow showers. Waves building to 1 to
3 feet.
.MONDAY NIGHT...Northeast winds 10 to 20 knots increasing to
15 to 25 knots after midnight. Snow showers. Freezing spray after
midnight. Waves building to 4 to 7 feet occasionally to 9 feet.
.TUESDAY...North winds 15 to 25 knots backing west. Heavy
freezing spray. Snow showers, then scattered snow showers. Waves
subsiding to 1 to 3 feet, then building to 3 to 5 feet
occasionally to 7 feet.
.WEDNESDAY...West winds 20 to 30 knots diminishing to 15 to
25 knots. Waves building to 3 to 6 feet occasionally to 8 feet,
then subsiding to 1 to 3 feet.

Note, wave height forecasts are for ice free areas.

$$

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-
955 AM EST Sat Jan 13 2018

...HEAVY FREEZING SPRAY WARNING IN EFFECT UNTIL 7 PM EST THIS
EVENING...

.REST OF TODAY...Northwest winds 15 to 25 knots increasing to
20 to 30 knots by mid afternoon. Heavy freezing spray. Numerous
snow showers late in the morning, then scattered snow showers in
the afternoon. Waves 4 to 8 feet occasionally to 10 feet.
.TONIGHT...Northwest winds 20 to 30 knots becoming west 15 to
25 knots by midnight. Scattered snow showers. Waves subsiding to
3 to 5 feet occasionally to 7 feet.
.SUNDAY...Southwest winds 15 to 25 knots becoming south 20 to
30 knots by mid afternoon. Isolated snow showers. Waves subsiding
to 2 to 4 feet, then building to 4 to 7 feet occasionally to
9 feet.
.SUNDAY NIGHT...South winds 20 to 30 knots diminishing to 15 to
25 knots after midnight. Freezing spray in the evening. Snow
showers. Waves building to 5 to 8 feet occasionally to 10 feet,
then subsiding to 3 to 5 feet occasionally to 7 feet.
.MONDAY...Southeast winds 10 to 20 knots backing east in the
afternoon. Snow showers. Waves subsiding to 2 to 4 feet.
.MONDAY NIGHT...East winds 15 to 25 knots backing northeast after
midnight. Snow showers. Freezing spray after midnight. Waves
building to 4 to 7 feet occasionally to 9 feet.
.TUESDAY...North winds 15 to 25 knots backing west. Freezing
spray. Snow showers, then scattered snow showers. Waves subsiding
to 2 to 4 feet, then building to 4 to 7 feet occasionally to
9 feet.
.WEDNESDAY...West gales to 35 knots becoming northwest 20 to
30 knots. Freezing spray. Scattered snow showers. Waves building
to 6 to 9 feet occasionally to 11 feet, then subsiding to 3 to
5 feet occasionally to 7 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ267-132300-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
955 AM EST Sat Jan 13 2018

.REST OF TODAY...North winds 10 to 20 knots becoming northwest
15 to 25 knots by mid afternoon. Snow showers. Waves 4 to 7 feet
occasionally to 9 feet.
.TONIGHT...Northwest winds 15 to 25 knots becoming west 10 to
20 knots by midnight. Numerous snow showers. Waves subsiding to
3 to 5 feet occasionally to 7 feet.
.SUNDAY...Southwest winds 15 to 25 knots becoming south 20 to
30 knots by mid afternoon. Scattered snow showers in the morning.
Waves building to 4 to 7 feet occasionally to 9 feet.
.SUNDAY NIGHT...South winds 20 to 30 knots diminishing to 15 to
25 knots after midnight. Freezing spray in the evening. Snow
showers. Waves subsiding to 3 to 5 feet occasionally to 7 feet.
.MONDAY...Southeast winds 15 to 25 knots backing east in the
afternoon. Numerous snow showers. Waves subsiding to 1 to 3 feet.
.MONDAY NIGHT...East winds 15 to 25 knots backing northeast after
midnight. Numerous snow showers. Waves building to 2 to 4 feet,
then subsiding to 1 to 3 feet.
.TUESDAY...North winds 10 to 20 knots becoming west 15 to
25 knots. Snow showers, then scattered snow showers. Waves
subsiding to 1 to 3 feet, then building to 3 to 6 feet
occasionally to 8 feet.
.WEDNESDAY...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 3 to
5 feet occasionally to 7 feet.

Note, wave height forecasts are for ice free areas.

$$
LSZ261-132300-
MAFOR 1316/
Superior West 11720 12630 13620 11520 11530. Scattered snow
showers late this morning. Waves 1 to 5 feet.

Superior North Central 13730 12720 11610 11620 11530. Scattered
snow showers late this morning. Scattered snow showers late
tonight and Sunday morning. Waves 1 to 5 feet.

Superior South Central...Heavy Freezing Spray Warning in effect...
11732 11740 12730 13620 11520. Scattered snow showers this
afternoon through mid morning Sunday. Waves 3 to 7 feet this
afternoon subsiding to 1 to 4 feet tonight and Sunday morning.

Superior East...11727 13737 11727 12627 11530. Scattered snow
showers Sunday morning. Waves 3 to 6 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.