Great Lakes Forecast
Issued by NWS

Home | Current Version | Previous Version | Text Only | 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
477
FZUS63 KMQT 142058
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
358 PM EST Thu Dec 14 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 weak low of 29.9 inches over Lake Superior will
move into eastern Ontario late Friday. A high of 30.0 inches will
then move through Ontario as a low of 29.8 inches passes through
the lower Great Lakes on Saturday. The region will then be
influenced by a weak high of 30.2 inches centered in the northern
Great Plains Sunday and into the early portion of next week.

LSZ162-150500-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
358 PM EST Thu Dec 14 2017 /258 PM CST Thu Dec 14 2017/

.LATE THIS AFTERNOON...West winds 10 to 20 knots. Scattered snow
showers. Waves calm to 2 feet.
.TONIGHT...Northwest winds 10 to 20 knots. Scattered snow
showers. Waves building to 2 to 4 feet.
.FRIDAY...Northwest winds 10 to 20 knots diminishing to 5 to
15 knots. Scattered snow showers. Waves subsiding to calm to
2 feet.
.FRIDAY NIGHT...North winds 5 to 15 knots veering east late.
Scattered snow showers. Waves building to 2 to 4 feet.
.SATURDAY...East winds 10 to 20 knots. A chance of snow showers.
Waves 2 to 4 feet.
.SATURDAY NIGHT...Southeast winds 5 to 15 knots veering south
after midnight. Waves subsiding to calm to 2 feet.
.SUNDAY...South winds 5 to 15 knots veering west in the
afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...West winds 5 to 15 knots increasing to 10 to
20 knots after midnight. Waves building to 1 to 3 feet.
.MONDAY...Southwest winds 15 to 25 knots becoming west 20 to
30 knots. A chance of snow showers. Waves building to 3 to 6 feet
occasionally to 8 feet.
.TUESDAY...West gales to 35 knots becoming northwest 20 to
30 knots. A chance of snow showers. Waves building to 4 to 7 feet
occasionally to 9 feet, then subsiding to 3 to 5 feet
occasionally to 7 feet.

$$

LSZ263-150500-
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-
358 PM EST Thu Dec 14 2017

.LATE THIS AFTERNOON...Northwest winds 10 to 20 knots. Scattered
snow showers. Waves 1 to 3 feet.
.TONIGHT...Northwest winds 10 to 20 knots veering north late.
Numerous snow showers. Waves building to 2 to 4 feet.
.FRIDAY...North winds 10 to 20 knots. Scattered snow showers.
Waves subsiding to 1 to 3 feet.
.FRIDAY NIGHT...North winds 10 to 20 knots becoming northeast
5 to 15 knots by midnight, then veering east late. Scattered snow
showers. Waves subsiding to calm to 2 feet, then building to 1 to
3 feet.
.SATURDAY...East winds 10 to 20 knots. A slight chance of snow
showers. Waves building to 2 to 4 feet, then subsiding to 1 to
3 feet.
.SATURDAY NIGHT...Southeast winds 5 to 15 knots veering south
after midnight. Waves subsiding to calm to 2 feet.
.SUNDAY...South winds 5 to 15 knots veering southwest in the
afternoon. A chance of snow showers. Waves calm to 2 feet.
.SUNDAY NIGHT...West winds 5 to 15 knots increasing to 10 to
20 knots after midnight. Waves building to 1 to 3 feet.
.MONDAY...Southwest winds 15 to 25 knots becoming west 20 to
30 knots. A chance of snow showers. Waves building to 4 to 7 feet
occasionally to 9 feet.
.TUESDAY...West gales to 35 knots veering northwest. A chance of
snow showers. Freezing spray. Waves building to 6 to 9 feet
occasionally to 11 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet.

$$

LSZ264-150500-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
358 PM EST Thu Dec 14 2017

.LATE THIS AFTERNOON...Northwest winds 10 to 20 knots. Scattered
snow showers. Waves 1 to 3 feet.
.TONIGHT...Northwest winds 10 to 20 knots veering north late.
Scattered snow showers in the evening, then numerous snow showers
after midnight. Waves building to 2 to 4 feet.
.FRIDAY...North winds 10 to 20 knots. Scattered snow showers.
Waves building to 3 to 5 feet occasionally to 7 feet.
.FRIDAY NIGHT...North winds 10 to 20 knots diminishing to 5 to
15 knots by midnight, then veering northeast late. Scattered snow
showers. Waves subsiding to 1 to 3 feet.
.SATURDAY...East winds 5 to 15 knots. A slight chance of snow
showers. Waves 1 to 3 feet.
.SATURDAY NIGHT...Southeast winds 5 to 15 knots veering south
after midnight. Waves subsiding to calm to 2 feet.
.SUNDAY...South winds 5 to 15 knots veering southwest in the
afternoon. A chance of snow showers. Waves calm to 2 feet.
.SUNDAY NIGHT...West winds 5 to 15 knots increasing to 10 to
20 knots after midnight. Waves building to 1 to 3 feet.
.MONDAY...Southwest winds 15 to 25 knots becoming west 20 to
30 knots. A chance of snow showers. Waves building to 4 to 7 feet
occasionally to 9 feet.
.TUESDAY...West gales to 35 knots veering northwest. A chance of
snow showers. Freezing spray. Waves building to 7 to 10 feet
occasionally to 13 feet, then subsiding to 5 to 8 feet
occasionally to 10 feet.

$$

LSZ265-150500-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
358 PM EST Thu Dec 14 2017

.LATE THIS AFTERNOON...West winds 15 to 25 knots. Scattered snow
showers. Waves 1 to 3 feet.
.TONIGHT...Northwest winds 15 to 25 knots. Numerous snow showers.
Waves building to 2 to 4 feet.
.FRIDAY...North winds 15 to 25 knots backing northwest. 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 by midnight, then veering northeast late. Scattered snow
showers in the evening, then numerous snow showers after
midnight. Waves subsiding to 1 to 3 feet.
.SATURDAY...East winds 10 to 20 knots. A chance of snow showers.
Waves subsiding to calm to 2 feet.
.SATURDAY NIGHT...Southeast winds 10 to 20 knots veering south
after midnight. Waves calm to 2 feet.
.SUNDAY...South winds 10 to 20 knots veering southwest in the
afternoon. A chance of snow showers. Waves calm to 2 feet.
.SUNDAY NIGHT...Southwest winds 10 to 20 knots veering west after
midnight. Waves calm to 2 feet.
.MONDAY...Southwest winds 15 to 25 knots increasing to 20 to
30 knots. A chance of snow showers. Waves building to 3 to 6 feet
occasionally to 8 feet.
.TUESDAY...West gales to 35 knots veering northwest. Snow showers
likely. Waves building to 5 to 9 feet occasionally to 11 feet.

$$

LSZ266-150500-
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-
358 PM EST Thu Dec 14 2017

.LATE THIS AFTERNOON...West winds 15 to 25 knots. Numerous snow
showers. Waves 2 to 4 feet.
.TONIGHT...Northwest winds 15 to 25 knots becoming north 10 to
20 knots late. Snow showers. Waves building to 3 to 5 feet
occasionally to 7 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 15 to 25 knots becoming northeast
10 to 20 knots late. Freezing spray in the evening. Scattered
snow showers. Waves subsiding to 2 to 4 feet.
.SATURDAY...East winds 10 to 20 knots. A slight chance of snow
showers. Waves subsiding to calm to 2 feet.
.SATURDAY NIGHT...Southeast winds 10 to 20 knots veering south
after midnight. Waves calm to 2 feet.
.SUNDAY...South winds 10 to 20 knots. A chance of snow showers.
Waves calm to 2 feet.
.SUNDAY NIGHT...Southwest winds 10 to 20 knots veering west after
midnight. A chance of snow showers. Waves building to 1 to
3 feet.
.MONDAY...Southwest winds 15 to 25 knots increasing to 20 to
30 knots. Snow showers likely. Waves building to 4 to 7 feet
occasionally to 9 feet.
.TUESDAY...West gales to 35 knots veering northwest. Snow showers
likely. Freezing spray. Waves building to 8 to 12 feet
occasionally to 15 feet.

$$

LSZ267-150500-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
358 PM EST Thu Dec 14 2017

.LATE THIS AFTERNOON...West winds 15 to 25 knots. Numerous snow
showers. Waves 1 to 3 feet.
.TONIGHT...West winds 15 to 25 knots becoming northwest 10 to
20 knots by midnight, then veering north late. 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. Snow showers. Waves building to 2 to 4 feet.
.FRIDAY NIGHT...North winds 15 to 25 knots diminishing to 10 to
20 knots late. Scattered snow showers. Waves building to 3 to
5 feet occasionally to 7 feet, then subsiding to 1 to 3 feet.
.SATURDAY...East winds 10 to 20 knots. A slight chance of snow
showers in the morning. Waves subsiding to calm to 2 feet.
.SATURDAY NIGHT...Southeast winds 10 to 20 knots. Waves calm to
2 feet.
.SUNDAY...Southeast winds 10 to 20 knots veering south in the
afternoon. A chance of snow showers. Waves calm to 2 feet.
.SUNDAY NIGHT...South winds 10 to 20 knots veering southwest
after midnight. A chance of snow showers. Waves calm to 2 feet.
.MONDAY...Southwest winds 10 to 20 knots increasing to 20 to
30 knots. Snow showers likely. Waves building to 4 to 7 feet
occasionally to 9 feet.
.TUESDAY...West gales to 35 knots veering northwest. Snow showers
likely. Waves building to 8 to 12 feet occasionally to 15 feet.

$$

LSZ261-150500-
MAFOR 1422/
Superior West 11720 12727 11730 14720. Scattered snow showers.
Waves 1 to 4 feet.

Superior North Central 12720 11727 11837 12830 12820. Scattered
snow showers this evening and Friday. Waves 1 to 5 feet.

Superior South Central 14727 11727 11837 12737. Scattered snow
showers early this evening. Freezing spray late Friday. Waves 2
to 5 feet.

Superior East 13727 11717 14827. Waves 2 to 4 feet.

$$

Petro

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.