Expires:202404260945;;378204
FZUS63 KMQT 260142
GLFLS 

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
942 PM EDT Thu Apr 25 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... This evening 30.4 ridging extends across central and
southern Quebec back into the Great Lakes region. During tonight 
and Friday, the ridge, at 30.5 inches, shifts to New England and 
the Maritime Provinces while low pressure of 29.2 inches lifts 
from eastern Colorado into Nebraska. This low continues to track 
northeast, weakening to 29.6 inches by the time it reaches 
northeast Lake Superior on Saturday evening. On Sunday, 30.4 inch 
high pressure builds over far northern Ontario as a 29.6 inch low 
pressure lifts northeast across the Central Plains. This low 
continues to track northeast, crossing Lake Superior Monday. In 
its wake, a 30.0 inch ridge shifts east across the Mississippi 
Valley Monday night into the Lower Great Lakes Tuesday.


LSZ267-260945-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
942 PM EDT Thu Apr 25 2024

.REST OF TONIGHT...South winds 10 to 20 knots increasing to 15 to
25 knots after midnight. Waves calm to 2 feet building to 2 to
4 feet. 
.FRIDAY...Southeast winds 15 to 25 knots increasing to 30 knots
with a few gale force gusts to 35 knots possible late. Waves
building to 4 to 7 feet occasionally to 9 feet. 
.FRIDAY NIGHT...Southeast winds to 30 knots with a few gale force
gusts to 35 knots possible diminishing to 20 to 30 knots after
midnight, then increasing to 30 knots with a few gale force gusts
to 35 knots possible late. A chance of rain showers through
midnight, then rain showers after midnight. Waves subsiding to
3 to 5 feet occasionally to 7 feet, then building to 4 to 7 feet
occasionally to 9 feet. 
.SATURDAY...Southeast winds to 30 knots with a few gale force
gusts to 35 knots possible decreasing to south winds 15 to 25 
knots by mid afternoon. Rain showers and a chance of 
thunderstorms. Waves building to 5 to 8 feet occasionally to 10 
feet, then subsiding to 3 to 5 feet occasionally to 7 feet. 
.SATURDAY NIGHT...Southwest winds 15 to 25 knots becoming west
10 to 20 knots after midnight. Rain showers likely through
midnight. A chance of thunderstorms. Waves subsiding to 1 to
3 feet, then building to 2 to 4 feet. 
.SUNDAY...Northeast winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. A chance of rain showers through early
afternoon, then rain showers likely by mid afternoon. Waves
building to 3 to 5 feet occasionally to 7 feet. 
.SUNDAY NIGHT...East winds 15 to 25 knots becoming southeast
gales to 35 knots after midnight. Rain showers. Waves building to
3 to 6 feet occasionally to 8 feet. 
.MONDAY...South winds 20 to 30 knots becoming west 15 to
25 knots. Rain showers, then a chance of rain showers. Waves
subsiding to 1 to 3 feet, then building to 2 to 4 feet. 
.TUESDAY...West winds 10 to 20 knots backing south. A chance of
rain showers. Waves subsiding to calm to 2 feet. 

$$