Expires:202001181045;;114084
FZUS63 KMQT 180235
GLFLS 

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
935 PM EST Fri Jan 17 2020

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...High pressure of 30.8 inches exiting east into Quebec
this evening will give way to a 29.8 inch low pressure 
approaching the Upper Great Lakes from the Central Plains. The low
will deepen to 29.5 inches as it transits Lake Michigan during 
the day Saturday. The low will continue its northeastward track 
and exit the region overnight Saturday. High pressure of 30.8 
inches will then build into the northern Dakotas Sunday morning, 
then slowly migrate southeast into South Dakota by Monday. Tuesday
this high will continue drifting southeast into the Ohio Valley 
as it weakens to 30.5 inches. 


LSZ267-181045-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
935 PM EST Fri Jan 17 2020

...GALE WARNING IN EFFECT FROM 1 AM EST SATURDAY THROUGH SATURDAY
MORNING...

.REST OF TONIGHT...Southeast winds 20 to 30 knots increasing to
gales to 35 knots by midnight. Freezing spray. A chance of snow
after midnight. Waves 2 to 4 feet building to 6 to 9 feet
occasionally to 11 feet. 
.SATURDAY...Southeast gales to 40 knots becoming east gales to
35 knots by late morning, then diminishing to 20 to 30 knots by
mid afternoon. Freezing spray in the morning. Snow. Waves
building to 7 to 10 feet occasionally to 13 feet, then subsiding
to 3 to 6 feet occasionally to 8 feet. 
.SATURDAY NIGHT...Northeast winds 15 to 25 knots becoming north
20 to 30 knots by midnight. Periods of snow showers. Freezing
spray after midnight. Waves subsiding to 3 to 6 feet occasionally
to 8 feet. 
.SUNDAY...North winds 15 to 25 knots. A chance of snow showers in
the morning. Freezing spray. Waves subsiding to 3 to 5 feet
occasionally to 7 feet. 
.SUNDAY NIGHT...North winds 15 to 25 knots backing northwest
after midnight. Freezing spray. Waves building to 3 to 6 feet
occasionally to 8 feet. 
.MONDAY...Northwest winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon. Freezing spray. Waves building to 5 to
8 feet occasionally to 10 feet. 
.MONDAY NIGHT...Northwest winds 20 to 30 knots diminishing to
15 to 25 knots after midnight. Freezing spray in the evening.
Waves subsiding to 3 to 5 feet occasionally to 7 feet. 
.TUESDAY...West winds 15 to 25 knots backing southwest. Waves
building to 3 to 6 feet occasionally to 8 feet. 
.WEDNESDAY...Southwest winds 15 to 25 knots. Waves subsiding to
3 to 5 feet occasionally to 7 feet. 

$$