Expires:202110220415;;046983
FZUS63 KMQT 212001
GLFLS 

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
401 PM EDT Thu Oct 21 2021

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...A 29.7 inch low pressure over Georgian Bay this
evening will track east, reaching southern Quebec tonight, while 
a 30.3 inch high pressure over northern Manitoba extends a 30.1 
inch ridge south into the Northern Plains. This high will then 
extend the ridge southeast toward the Upper Great Lakes Friday 
and Saturday. Sunday and Monday, the high pressure will build to 
30.4 inches as it shifts over northern Ontario. The ridge weakens
to 29.8 inches Tuesday as a 29.3 inch low pressure organizes over
the Central Plains. 

&&


LSZ266-220415-
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-
401 PM EDT Thu Oct 21 2021

.LATE THIS AFTERNOON...North winds 20 to 30 knots. Isolated
showers. Waves 4 to 7 feet occasionally to 9 feet. 
.TONIGHT...North winds 20 to 30 knots diminishing to 10 to
20 knots. Scattered rain showers. Waves subsiding to 2 to 4 feet.
.FRIDAY...North winds 10 to 20 knots. Scattered rain showers.
Waves subsiding to 1 to 3 feet. 
.FRIDAY NIGHT...North winds 10 to 20 knots. A chance of rain
showers. Waves building to 2 to 4 feet. 
.SATURDAY...Northwest winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. Rain showers likely. Waves 2 to
4 feet. 
.SATURDAY NIGHT...Northwest winds 15 to 25 knots becoming north
10 to 20 knots after midnight. Rain showers likely through
midnight, then a chance of rain showers after midnight. Waves
2 to 4 feet. 
.SUNDAY...Northeast winds 10 to 20 knots veering east by mid
afternoon. Waves subsiding to 1 to 3 feet. 
.SUNDAY NIGHT...East winds 10 to 20 knots. Waves building to 3 to
5 feet occasionally to 7 feet. 
.MONDAY...East winds 15 to 25 knots diminishing to 10 to
20 knots. Waves subsiding to 2 to 4 feet. 
.TUESDAY...Southeast winds 10 to 20 knots increasing to 15 to
25 knots. Waves building to 3 to 6 feet occasionally to 8 feet. 

$$