Expires:202110220415;;046981
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. 

&&


LSZ264-220415-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
401 PM EDT Thu Oct 21 2021

.LATE THIS AFTERNOON...North winds 15 to 25 knots. Isolated rain
showers. Waves 3 to 6 feet occasionally to 8 feet. 
.TONIGHT...North winds 15 to 25 knots diminishing to 5 to
15 knots. Isolated rain showers. Waves subsiding to 1 to 3 feet. 
.FRIDAY...North winds 5 to 15 knots. Isolated rain showers. Waves
1 to 3 feet. 
.FRIDAY NIGHT...North winds 5 to 15 knots. A slight chance of
rain showers. Waves building to 2 to 4 feet. 
.SATURDAY...North winds 5 to 15 knots becoming northwest 10 to
20 knots by mid afternoon. A chance of rain showers. Waves 2 to
4 feet. 
.SATURDAY NIGHT...North winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. Waves subsiding to 1 to 3 feet. 
.SUNDAY...Northeast winds 5 to 15 knots veering east by mid
afternoon. Waves 1 to 3 feet. 
.SUNDAY NIGHT...East winds 5 to 15 knots. Waves building to 3 to
5 feet occasionally to 7 feet. 
.MONDAY...East winds 5 to 15 knots. Waves subsiding to 2 to
4 feet. 
.TUESDAY...Southeast winds 5 to 15 knots increasing to 10 to
20 knots. A chance of showers. Waves building to 3 to 6 feet
occasionally to 8 feet. 

$$