Expires:202110220415;;046985
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. 

&&


LSZ261-220415-
MAFOR 2121/
Superior West 11810 11820 14810 11810 11700. Waves 1 to 3 feet
tonight and Friday.

Superior North Central 12830 13820 11720 19726 11820 19826 11820.
Waves 3 to 6 feet subsiding to 2 to 4 feet tonight and Friday.  

Superior South Central 11830 12830 19836 11820 19826 12720 19726
11726 11720 19726. Waves 3 to 6 feet tonight subsiding to 2 to 4 
feet Friday. 

Superior East 11840 11830 11820 14810 19816 11810 19816. Waves 3
to 6 feet subsiding to 1 to 4 feet tonight and Friday. 

$$

JSS

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

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