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
000
FZUS63 KMQT 161959
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
359 PM EDT Fri Jun 16 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 29.4 inch low pressure over northwest Ontario will
move to James Bay tonight. Saturday, the low will weaken to 29.5
inches, with a trough extending back to a 29.6 inch low over the
Central Plains. The Central Plains low will move over Upper
Michigan Sunday while strengthening to 29.4 inches. The low will
reach James Bay on Monday as a 29.8 inch ridge builds across the
Upper Mississippi River Valley through Wednesday.

LSZ162-170400-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
359 PM EDT Fri Jun 16 2017 /259 PM CDT Fri Jun 16 2017/

.LATE THIS AFTERNOON...Southwest winds 5 to 15 knots. Patchy fog.
A slight chance of showers. Waves calm to 2 feet.
.TONIGHT...Southwest winds 5 to 15 knots. Patchy fog. A slight
chance of thunderstorms through midnight. A slight chance of
showers. Waves calm to 2 feet.
.SATURDAY...Southwest winds 5 to 15 knots backing southeast late.
Patchy fog. A chance of showers and thunderstorms. Waves calm to
2 feet.
.SATURDAY NIGHT...Southeast winds 5 to 15 knots backing northeast
after midnight, then backing north late. A chance of rain showers
and a slight chance of thunderstorms through midnight, then rain
showers likely after midnight. Waves calm to 2 feet.
.SUNDAY...Northwest winds 10 to 20 knots backing west by mid
afternoon. A chance of showers. Waves calm to 2 feet.
.SUNDAY NIGHT...Northwest winds 10 to 20 knots backing west after
midnight. Waves calm to 2 feet.
.MONDAY...West winds 10 to 20 knots. Waves calm to 2 feet.
.MONDAY NIGHT...West winds 5 to 15 knots. Waves calm to 2 feet.
.TUESDAY...West winds 10 to 20 knots diminishing to 5 to
15 knots. Waves calm to 2 feet.
.WEDNESDAY...Southeast winds 5 to 15 knots becoming east 10 to
20 knots. A chance of showers. Waves calm to 2 feet.

$$

LSZ263-170400-
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-
359 PM EDT Fri Jun 16 2017

.LATE THIS AFTERNOON...Southwest winds 5 to 15 knots. Patchy fog.
A slight chance of showers and thunderstorms. Waves calm to
2 feet.
.TONIGHT...Southwest winds 5 to 15 knots diminishing to less than
10 knots late. Patchy fog. A slight chance of thunderstorms
through midnight. A slight chance of showers. Waves calm to
2 feet.
.SATURDAY...Southwest winds less than 10 knots veering west in
the afternoon, then backing south late. Patchy fog. A slight
chance of showers. A slight chance of thunderstorms by mid
afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...East winds less than 10 knots backing northeast
after midnight, then becoming north 5 to 15 knots late. A chance
of rain showers through midnight, then rain showers likely and a
slight chance of thunderstorms after midnight. Waves calm to
2 feet.
.SUNDAY...North winds 5 to 15 knots backing west by mid
afternoon. Showers likely through early afternoon, then a chance
of showers by mid afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...West winds 5 to 15 knots. Waves calm to 2 feet.
.MONDAY...West winds 5 to 15 knots. Waves calm to 2 feet.
.MONDAY NIGHT...West winds 5 to 15 knots. Waves calm to 2 feet.
.TUESDAY...West winds 5 to 15 knots. Waves calm to 2 feet.
.WEDNESDAY...Southwest winds 5 to 15 knots backing southeast. A
chance of showers. Waves calm to 2 feet.

$$

LSZ264-170400-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
359 PM EDT Fri Jun 16 2017

.LATE THIS AFTERNOON...Southwest winds 5 to 15 knots. Patchy fog.
Waves calm to 2 feet.
.TONIGHT...Southwest winds 5 to 15 knots diminishing to less than
10 knots late. Areas of fog. A slight chance of rain showers.
Waves calm to 2 feet.
.SATURDAY...West winds less than 10 knots backing south in the
afternoon, then backing southeast late. Patchy fog. A slight
chance of rain showers. A slight chance of thunderstorms by mid
afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...Southeast winds less than 10 knots backing east
after midnight, then becoming northeast 5 to 15 knots late. A
chance of rain showers through midnight, then rain showers likely
after midnight. Waves calm to 2 feet.
.SUNDAY...North winds 5 to 15 knots becoming northwest 10 to
20 knots by mid afternoon. Rain showers likely through early
afternoon, then a chance of rain showers by mid afternoon. Waves
building to 2 to 4 feet.
.SUNDAY NIGHT...Northwest winds 5 to 15 knots. A chance of rain
showers. Waves subsiding to calm to 2 feet.
.MONDAY...West winds 5 to 15 knots. Waves calm to 2 feet.
.MONDAY NIGHT...West winds 5 to 15 knots. Waves calm to 2 feet.
.TUESDAY...West winds 5 to 15 knots. Waves calm to 2 feet.
.WEDNESDAY...West winds 5 to 15 knots backing southeast. A chance
of rain showers. Waves building to 1 to 3 feet.

$$

LSZ265-170400-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
359 PM EDT Fri Jun 16 2017

.LATE THIS AFTERNOON...South winds 5 to 15 knots. A slight chance
of showers and thunderstorms. Waves calm to 2 feet.
.TONIGHT...Southwest winds 5 to 15 knots increasing to 10 to
20 knots after midnight, then diminishing to 5 to 15 knots late.
A slight chance of thunderstorms through midnight. A chance of
showers. Patchy fog after midnight. Waves calm to 2 feet.
.SATURDAY...South winds 5 to 15 knots backing east in the
afternoon. Patchy fog. A chance of showers and a slight chance of
thunderstorms. Waves calm to 2 feet.
.SATURDAY NIGHT...Southeast winds 5 to 15 knots backing northeast
late. A chance of showers and a slight chance of thunderstorms
through midnight, then showers likely after midnight. Waves calm
to 2 feet.
.SUNDAY...North winds 10 to 20 knots becoming northwest 15 to
25 knots by mid afternoon. Showers likely through early
afternoon, then a chance of showers by mid afternoon. Waves
building to 2 to 4 feet.
.SUNDAY NIGHT...Northwest winds 10 to 20 knots backing west after
midnight. A chance of showers. Waves subsiding to calm to 2 feet.
.MONDAY...West winds 10 to 20 knots. Waves calm to 2 feet.
.MONDAY NIGHT...West winds 10 to 20 knots. Waves calm to 2 feet.
.TUESDAY...West winds 10 to 20 knots. Waves calm to 2 feet.
.WEDNESDAY...East winds 10 to 20 knots veering southeast. A
chance of showers. Waves calm to 2 feet.

$$

LSZ266-170400-
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-
359 PM EDT Fri Jun 16 2017

.LATE THIS AFTERNOON...South winds 5 to 15 knots. Patchy fog. A
slight chance of showers and thunderstorms. Waves calm to 2 feet.
.TONIGHT...South winds 5 to 15 knots becoming southwest 10 to
20 knots after midnight, then diminishing to 5 to 15 knots late.
Areas of fog. A slight chance of thunderstorms through midnight.
A chance of rain showers. Waves calm to 2 feet.
.SATURDAY...South winds 5 to 15 knots backing southeast late.
Areas of fog. A slight chance of showers and thunderstorms. Waves
calm to 2 feet.
.SATURDAY NIGHT...Southeast winds 5 to 15 knots backing east
after midnight. A chance of rain showers and a slight chance of
thunderstorms through midnight, then rain showers likely after
midnight. Waves calm to 2 feet.
.SUNDAY...North winds 10 to 20 knots becoming northwest 15 to
25 knots by mid afternoon. Rain showers likely through early
afternoon, then a chance of rain showers by mid afternoon. Waves
building to 2 to 4 feet.
.SUNDAY NIGHT...Northwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. A chance of rain showers. Waves
building to 3 to 5 feet occasionally to 7 feet, then subsiding to
1 to 3 feet.
.MONDAY...West winds 10 to 20 knots diminishing to 5 to 15 knots
by mid afternoon. Waves subsiding to calm to 2 feet.
.MONDAY NIGHT...West winds 5 to 15 knots increasing to 10 to
20 knots after midnight. Waves calm to 2 feet.
.TUESDAY...West winds 10 to 20 knots. Waves calm to 2 feet.
.WEDNESDAY...West winds 10 to 20 knots backing southeast. A
chance of rain showers. Waves building to 1 to 3 feet.

$$

LSZ267-170400-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
359 PM EDT Fri Jun 16 2017

.LATE THIS AFTERNOON...South winds 10 to 20 knots. Patchy fog. A
chance of showers and thunderstorms. Waves calm to 2 feet.
.TONIGHT...South winds 10 to 20 knots diminishing to 5 to
15 knots late. Areas of fog. A slight chance of thunderstorms
through midnight. A chance of rain showers. Waves calm to 2 feet.
.SATURDAY...South winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon, then backing southeast late. Areas of
fog through early afternoon. Widespread fog by mid afternoon. A
chance of rain showers and a slight chance of thunderstorms.
Waves calm to 2 feet.
.SATURDAY NIGHT...Southeast winds 5 to 15 knots backing east
after midnight. A chance of rain showers through midnight, then
rain showers likely after midnight. Waves calm to 2 feet.
.SUNDAY...North winds 10 to 20 knots becoming west 15 to 25 knots
by mid afternoon. Rain showers likely through early afternoon,
then a chance of rain showers by mid afternoon. Waves building to
1 to 3 feet.
.SUNDAY NIGHT...West winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. Rain showers likely through midnight,
then a chance of rain showers after midnight. Waves building to
3 to 5 feet occasionally to 7 feet, then subsiding to 1 to
3 feet.
.MONDAY...West winds 10 to 20 knots. Waves subsiding to calm to
2 feet.
.MONDAY NIGHT...West winds 10 to 20 knots backing southwest after
midnight. Waves calm to 2 feet.
.TUESDAY...West winds 10 to 20 knots veering northwest. Waves
calm to 2 feet.
.WEDNESDAY...West winds 10 to 20 knots backing southeast. A
chance of rain showers. Waves building to 1 to 3 feet.

$$

LSZ261-170400-
MAFOR 1621/
Superior West 13510 14500 11400. Patchy fog through late tonight.
Chance of showers late Saturday. Waves 2 feet or less.

Superior North Central 11510 12513 11510 13500 11400. Patchy fog.
Waves 1 to 2 feet.

Superior South Central 11400 11500 12510 11500 11400 11300 11200.
Patchy fog. Chance of showers overnight through Saturday. Waves 2
feet or less.

Superior East 11410 13513 12413 11403 11303. Patchy fog early
this evening. Chance of showers early this evening through early
afternoon Saturday. Waves 1 to 2 feet.

$$

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.