fzus63 kmqt 291358
glfls 
expires:202404292200;;585060

open lake forecast for lake superior
national weather service marquette mi
958 am edt mon apr 29 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...a 30.6 inch high pressure over james bay will shift 
northeast into quebec today. meanwhile, a 29.7 inch low pressure 
over southern minnesota will track northeast, crossing western 
lake superior tonight and exiting into ontario tuesday morning as 
it weakens to 29.8 inches. during tuesday afternoon and evening, 
a weak high pressure ridge of 29.9 inches will shift east across 
lake superior while a low pressure trough of 29.6 inches moves 
from the western plains to minnesota and iowa. this trough will 
weaken to 29.7 inches as it sails across lake superior on 
wednesday. as a 30.0 inch ridge then shifts east across the 
western great lakes during wednesday night, a 29.3 inch colorado 
low will lift out over the plains while weakening to 29.5 inches. 
this low will then track to the upper mississippi valley on 
thursday and into northern ontario on friday. 


lsz162-292200-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
958 am edt mon apr 29 2024 /858 am cdt mon apr 29 2024/

...gale warning in effect until 5 pm edt /4 pm cdt/ this
afternoon...

.rest of today...northeast gales to 40 knots diminishing to gales
to 35 knots this afternoon, then to 20 to 30 knots late. 
scattered rain showers through late morning, then numerous rain 
showers by mid afternoon. waves 10 to 14 feet occasionally to 18 
feet subsiding to 7 to 10 feet occasionally to 13 feet. 
.tonight...northeast winds 15 to 25 knots becoming northwest
10 to 20 knots after midnight, then backing west late. a chance
of rain showers. waves subsiding to 2 to 4 feet. 
.tuesday...west winds 10 to 20 knots becoming southwest 5 to
15 knots in the afternoon, then backing south late. waves
subsiding to calm to 2 feet. 
.tuesday night...east winds 5 to 15 knots increasing to 10 to
20 knots after midnight. a chance of rain showers through
midnight, then rain showers after midnight. waves building to
2 to 4 feet. 
.wednesday...southwest winds 15 to 25 knots. a chance of rain
showers in the morning. waves building to 4 to 7 feet 
occasionally to 9 feet, then subsiding to 3 to 5 feet occasionally
to 7 feet. 
.wednesday night...west winds 5 to 15 knots backing east after
midnight. waves subsiding to calm to 2 feet. 
.thursday...northeast winds 15 to 25 knots. a chance of rain
showers. waves building to 2 to 4 feet. 
.friday...southwest winds 15 to 25 knots veering west. a chance
of rain showers. waves subsiding to 1 to 3 feet. 

$$

fzus63 kmqt 291358
glfls 
expires:202404292200;;585061

open lake forecast for lake superior
national weather service marquette mi
958 am edt mon apr 29 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...a 30.6 inch high pressure over james bay will shift 
northeast into quebec today. meanwhile, a 29.7 inch low pressure 
over southern minnesota will track northeast, crossing western 
lake superior tonight and exiting into ontario tuesday morning as 
it weakens to 29.8 inches. during tuesday afternoon and evening, 
a weak high pressure ridge of 29.9 inches will shift east across 
lake superior while a low pressure trough of 29.6 inches moves 
from the western plains to minnesota and iowa. this trough will 
weaken to 29.7 inches as it sails across lake superior on 
wednesday. as a 30.0 inch ridge then shifts east across the 
western great lakes during wednesday night, a 29.3 inch colorado 
low will lift out over the plains while weakening to 29.5 inches. 
this low will then track to the upper mississippi valley on 
thursday and into northern ontario on friday. 


lsz263-292200-
lake superior from saxon harbor wi to upper entrance to portage
canal mi 5nm off shore to the us/canadian border including isle
royale national park-
958 am edt mon apr 29 2024

...gale warning in effect until 5 pm edt this afternoon...

.rest of today...east gales to 35 knots diminishing to 20 to
30 knots late. scattered rain showers. waves 9 to 12 feet
occasionally to 15 feet subsiding to 7 to 10 feet occasionally to
13 feet. 
.tonight...northeast winds 15 to 25 knots diminishing to 10 to
20 knots after midnight, then becoming west 5 to 15 knots late. a
chance of rain showers. waves subsiding to 2 to 4 feet. 
.tuesday...west winds 5 to 15 knots backing southwest late. waves
subsiding to calm to 2 feet. 
.tuesday night...east winds 5 to 15 knots increasing to 10 to
20 knots after midnight. a slight chance of rain showers through
midnight, then rain showers likely after midnight. waves building
to 2 to 4 feet. 
.wednesday...southwest winds 15 to 25 knots increasing to 20 to
30 knots by mid afternoon. a chance of rain showers. waves
building to 4 to 8 feet occasionally to 10 feet. 
.wednesday night...southwest winds 5 to 15 knots backing south
after midnight. waves subsiding to calm to 2 feet. 
.thursday...east winds 10 to 20 knots increasing to 15 to
25 knots. a chance of rain showers. waves building to 2 to
4 feet. 
.friday...southwest winds 10 to 20 knots veering west. a chance
of rain showers. waves 2 to 4 feet. 

$$