398
FZUS63 KMQT 171947
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
347 PM EDT Mon Jun 17 2024

For waters beyond 5 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...Weak ridging of 29.9 inches is over the lake this
afternoon while a 29.2 inch low pressure moves off the Colorado
Rockies into the Northern Plains. The low will track across
northern Minnesota at 29.5 inches Tuesday, reaching James Bay
Wednesday morning as it pulls a 29.7 inch trough over Lake
Superior. As the low lifts northeast, high pressure to 30.4
inches builds over Lake Superior for Thursday and Friday. Friday
night, the high weakens to 30.2 inches and slides east. Saturday,
Lake Superior will be between a high of 30.1 inches over New
England and a 29.6 inch low over Minnesota.

LSZ162-180400-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
347 PM EDT Mon Jun 17 2024 /247 PM CDT Mon Jun 17 2024/

.LATE THIS AFTERNOON...Northeast winds 10 to 20 knots. A chance
of showers and a slight chance of thunderstorms. Waves calm to
2 feet.
.TONIGHT...Northeast winds 10 to 20 knots veering east late.
Showers likely through midnight. A chance of thunderstorms. A
chance of showers after midnight. Patchy fog after midnight.
Waves building to 1 to 3 feet, then subsiding to calm to 2 feet.
.TUESDAY...East winds 10 to 20 knots increasing to 15 to 25 knots
in the afternoon, then veering south late. Patchy fog through
early afternoon. A slight chance of showers through early
afternoon. A chance of thunderstorms. Showers likely by mid
afternoon. Waves building to 2 to 4 feet.
.TUESDAY NIGHT...South winds 20 to 30 knots becoming southwest
15 to 25 knots after midnight, then veering west late. Showers
and a chance of thunderstorms. Waves 2 to 4 feet.
.WEDNESDAY...West winds 10 to 20 knots. A slight chance of
showers and thunderstorms through early afternoon. Waves
subsiding to calm to 2 feet.
.WEDNESDAY NIGHT...Northwest winds 5 to 15 knots veering north
after midnight. Waves calm to 2 feet.
.THURSDAY...Northeast winds 5 to 15 knots. Waves calm to 2 feet.
.THURSDAY NIGHT...Northeast winds 5 to 15 knots. Waves calm to
2 feet.
.FRIDAY...Northeast winds 10 to 20 knots. A chance of showers. A
chance of thunderstorms. Showers likely. Waves building to 1 to
3 feet.
.SATURDAY...Northeast winds 15 to 25 knots diminishing to 10 to
20 knots. Showers likely. A chance of thunderstorms. A chance of
showers. Waves building to 2 to 4 feet, then subsiding to 1 to
3 feet.

$$

LSZ263-180400-
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-
347 PM EDT Mon Jun 17 2024

.LATE THIS AFTERNOON...Northeast winds 5 to 15 knots. A chance of
showers and a slight chance of thunderstorms. Waves calm to
2 feet.
.TONIGHT...East winds 5 to 15 knots. Showers likely through
midnight. A chance of thunderstorms. A chance of showers after
midnight. Patchy fog after midnight. Waves calm to 2 feet.
.TUESDAY...East winds 5 to 15 knots becoming south 10 to 20 knots
in the afternoon, then increasing to 15 to 25 knots late. Patchy
fog through early afternoon. A chance of thunderstorms and a
slight chance of showers. Waves building to 2 to 4 feet.
.TUESDAY NIGHT...South winds 15 to 25 knots veering west late.
Showers likely and a chance of thunderstorms. Waves building to
3 to 5 feet occasionally to 7 feet.
.WEDNESDAY...West winds 10 to 20 knots. A slight chance of
thunderstorms through early afternoon. A slight chance of
showers. Waves subsiding to 1 to 3 feet.
.WEDNESDAY NIGHT...West winds 5 to 15 knots veering north after
midnight. Waves subsiding to calm to 2 feet.
.THURSDAY...Northeast winds 5 to 15 knots. Waves calm to 2 feet.
.THURSDAY NIGHT...East winds less than 10 knots. Waves calm to
2 feet.
.FRIDAY...Northeast winds 5 to 15 knots veering east. A chance of
showers. Showers likely. Waves calm to 2 feet.
.SATURDAY...East winds 10 to 20 knots veering west. Showers
likely. A chance of thunderstorms. A chance of showers. Waves
building to 2 to 4 feet, then subsiding to 1 to 3 feet.

$$

LSZ264-180400-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
347 PM EDT Mon Jun 17 2024

.LATE THIS AFTERNOON...South winds 5 to 15 knots. A chance of
showers and a slight chance of thunderstorms. Waves calm to
2 feet.
.TONIGHT...East winds 5 to 15 knots. Showers likely through
midnight. A chance of thunderstorms. A chance of showers after
midnight. Patchy fog after midnight. Waves calm to 2 feet.
.TUESDAY...Southeast winds 10 to 20 knots increasing to 15 to
25 knots late. Patchy fog through early afternoon. A chance of
showers and a slight chance of thunderstorms. Waves building to
3 to 5 feet occasionally to 7 feet.
.TUESDAY NIGHT...South winds 15 to 25 knots diminishing to 10 to
20 knots after midnight, then becoming southwest 15 to 25 knots
late. Showers likely and a chance of thunderstorms. Waves 3 to
5 feet occasionally to 7 feet.
.WEDNESDAY...West winds 10 to 20 knots. A slight chance of
thunderstorms through early afternoon. A slight chance of
showers. Waves subsiding to 2 to 4 feet.
.WEDNESDAY NIGHT...West winds 5 to 15 knots veering north after
midnight. Waves subsiding to calm to 2 feet.
.THURSDAY...Northeast winds 5 to 15 knots veering east by mid
afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...West winds less than 10 knots backing east
after midnight. Waves calm to 2 feet.
.FRIDAY...East winds 5 to 15 knots. A chance of showers. Waves
calm to 2 feet.
.SATURDAY...East winds 10 to 20 knots. Showers likely. A chance
of thunderstorms. A chance of showers. Waves building to 2 to
4 feet.

$$

LSZ265-180400-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
347 PM EDT Mon Jun 17 2024

.LATE THIS AFTERNOON...East winds 10 to 20 knots. Showers likely
and a chance of thunderstorms. Waves calm to 2 feet.
.TONIGHT...East winds 10 to 20 knots veering southeast after
midnight. Patchy fog. Showers likely through midnight. A chance
of thunderstorms. A chance of showers after midnight. Waves calm
to 2 feet.
.TUESDAY...Southeast winds 15 to 25 knots becoming south 20 to
30 knots late. A chance of showers and a slight chance of
thunderstorms by mid afternoon. Waves building to 2 to 4 feet.
.TUESDAY NIGHT...South winds 15 to 25 knots veering southwest
late. A chance of showers and thunderstorms. Waves subsiding to
1 to 3 feet.
.WEDNESDAY...West winds 10 to 20 knots. A chance of showers and a
slight chance of thunderstorms. Waves subsiding to calm to
2 feet.
.WEDNESDAY NIGHT...West winds 5 to 15 knots veering northwest
after midnight. Waves calm to 2 feet.
.THURSDAY...North winds 5 to 15 knots. Waves calm to 2 feet.
.THURSDAY NIGHT...East winds 5 to 15 knots becoming southeast
less than 10 knots after midnight. Waves calm to 2 feet.
.FRIDAY...East winds 5 to 15 knots. A chance of showers. Showers
likely. Waves calm to 2 feet.
.SATURDAY...East winds 10 to 20 knots veering southeast. Showers
likely and a chance of thunderstorms. Waves calm to 2 feet.

$$

LSZ266-180400-
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-
347 PM EDT Mon Jun 17 2024

.LATE THIS AFTERNOON...East winds 5 to 15 knots. A chance of
showers and thunderstorms. Waves calm to 2 feet.
.TONIGHT...East winds 10 to 20 knots veering south late. Patchy
fog. Showers likely through midnight. A chance of thunderstorms.
A chance of showers after midnight. Waves building to 1 to
3 feet.
.TUESDAY...South winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon. Patchy fog through early afternoon. A
chance of showers and a slight chance of thunderstorms. Waves
building to 3 to 6 feet occasionally to 8 feet.
.TUESDAY NIGHT...South winds 20 to 30 knots diminishing to 15 to
25 knots late. A chance of showers and thunderstorms. Waves
subsiding to 2 to 4 feet.
.WEDNESDAY...Southwest winds 15 to 25 knots becoming west 10 to
20 knots by mid afternoon. A chance of showers and a slight
chance of thunderstorms. Waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 2 to 4 feet.
.WEDNESDAY NIGHT...West winds 5 to 15 knots veering northwest
after midnight. A chance of showers. Waves subsiding to calm to
2 feet.
.THURSDAY...North winds 5 to 15 knots. Waves calm to 2 feet.
.THURSDAY NIGHT...Northwest winds 5 to 15 knots veering north
after midnight. Waves calm to 2 feet.
.FRIDAY...East winds 5 to 15 knots. A chance of showers. Waves
calm to 2 feet.
.SATURDAY...East winds 10 to 20 knots veering southeast. Showers
likely and a chance of thunderstorms. Waves building to 1 to
3 feet.

$$

LSZ267-180400-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
347 PM EDT Mon Jun 17 2024

.LATE THIS AFTERNOON...East winds 5 to 15 knots. Patchy fog. A
chance of showers and thunderstorms. Waves calm to 2 feet.
.TONIGHT...East winds 10 to 20 knots veering south late. Patchy
fog. Showers likely through midnight. A chance of thunderstorms.
A chance of showers after midnight. Waves calm to 2 feet.
.TUESDAY...South winds 15 to 25 knots. Patchy fog through early
afternoon. A chance of showers by mid afternoon. Waves building
to 3 to 5 feet occasionally to 7 feet.
.TUESDAY NIGHT...South winds 15 to 25 knots. A chance of showers
and thunderstorms. Waves subsiding to 2 to 4 feet.
.WEDNESDAY...Southwest winds 10 to 20 knots veering west by mid
afternoon. A chance of showers through early afternoon. A chance
of thunderstorms. Showers likely by mid afternoon. Waves
subsiding to calm to 2 feet.
.WEDNESDAY NIGHT...West winds 5 to 15 knots veering northwest
after midnight. A chance of showers. Waves calm to 2 feet.
.THURSDAY...North winds 5 to 15 knots becoming northwest 10 to
20 knots by mid afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...Northwest winds 5 to 15 knots veering north
after midnight. Waves calm to 2 feet.
.FRIDAY...Northeast winds 5 to 15 knots veering east. A chance of
showers. Waves calm to 2 feet.
.SATURDAY...Southeast winds 10 to 20 knots. Showers likely and a
chance of thunderstorms. Waves building to 1 to 3 feet.

$$

LSZ261-180400-
MAFOR 1721/
Superior West 11110 12116 12216 11210 11310 11320. A chance of
thunderstorms tonight and Tuesday morning. Waves 1 to 3 feet.

Superior North Central 11400 11316 11216 11210 11310 12320 11330.
A chance of thunderstorms tonight and Tuesday morning. Waves 1 to
3 feet tonight building to 3 to 5 feet Tuesday.

Superior South Central 11310 11216 11316 11310 13320 11330. A
chance of thunderstorms tonight. Waves 2 feet or less tonight.
Waves 1 to 4 feet Tuesday.

Superior East 11200 12216 11316 13420 11430. A chance of
thunderstorms tonight and Tuesday morning. Waves 1 to 2 feet
tonight. Waves 2 to 5 feet Tuesday.

$$

GS

Experimental modernized open lake forecast is available online at
weather.gov/mqt/glftable

Graphical marine forecasts are available online at:
weather.gov/greatlakes