National Weather Service Marine Forecast FZUS63 KMQT
FZUS63 KMQT 190747
GLFLS
Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
347 AM EDT Tue Mar 19 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 29.6 inch low tracks southeast across eastern Lake
Superior and adjacent portions of Ontario today while deepening to
29.4 inches. By tonight, the low pressure shifts east over
southern Quebec while a broad high pressure ridge builds southeast
toward the Great Lakes Basin. Ridging builds to 30.2 inches over
Lake Superior by Wednesday evening then to 30.4 inches on
Thursday. A weak 30.2 inch inverted trough moves across Lake
Superior on Friday before ridging of at least 30.4 inches moves
back over the lake on Saturday.
LSZ162-191600
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM
347 AM EDT Tue Mar 19 2024 /247 AM CDT Tue Mar 19 2024/
HEAVY FREEZING SPRAY WARNING IN EFFECT FROM THIS EVENING THROUGH WEDNESDAY EVENING
EARLY THIS MORNING
West winds 15 to 25 knots. Waves 3 to
6 feet occasionally to 8 feet.
TODAY
Northwest winds 20 to 30 knots increasing to 30 knots
with a few gale force gusts to 35 knots possible late. Waves
building to 4 to 7 feet occasionally to 9 feet.
TONIGHT
Northwest winds to 30 knots with a few gale force
gusts to 35 knots possible. Heavy freezing spray. A slight chance
of snow showers after midnight. Waves building to 5 to 8 feet
occasionally to 10 feet.
WEDNESDAY
Northwest winds 20 to 30 knots diminishing to 15 to
25 knots late. Heavy freezing spray through early afternoon.
Waves subsiding to 1 to 3 feet.
WEDNESDAY NIGHT
Northwest winds 15 to 25 knots becoming north
10 to 20 knots after midnight. Waves subsiding to calm to 2 feet.
THURSDAY
Northwest winds 10 to 20 knots backing south by mid
afternoon. Waves calm to 2 feet.
THURSDAY NIGHT
East winds 10 to 20 knots. A chance of snow
showers. Waves calm to 2 feet.
FRIDAY
Northeast winds 10 to 20 knots becoming northwest 15 to
25 knots. A chance of snow showers. Waves building to 2 to
4 feet.
SATURDAY
Northwest winds 15 to 25 knots becoming east 10 to
20 knots. Waves subsiding to calm to 2 feet.
LSZ263-191600
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
347 AM EDT Tue Mar 19 2024
GALE WARNING IN EFFECT FROM THIS EVENING THROUGH WEDNESDAY MORNING
HEAVY FREEZING SPRAY WARNING IN EFFECT FROM THIS EVENING THROUGH WEDNESDAY EVENING
EARLY THIS MORNING
West winds 15 to 25 knots. Waves 4 to
8 feet occasionally to 10 feet.
TODAY
Northwest winds 20 to 30 knots. Isolated snow showers by
mid afternoon. Waves building to 5 to 8 feet occasionally to
10 feet.
TONIGHT
Northwest gales to 40 knots. Heavy freezing spray. A
slight chance of snow showers. Waves building to 7 to 10 feet
occasionally to 13 feet.
WEDNESDAY
North gales to 35 knots becoming northwest 20 to
30 knots in the afternoon. Heavy freezing spray. A slight chance
of snow showers. Waves subsiding to 2 to 4 feet.
WEDNESDAY NIGHT
Northwest winds 20 to 30 knots becoming north
15 to 25 knots after midnight. A chance of snow showers. Waves
building to 3 to 6 feet occasionally to 8 feet, then subsiding to
1 to 3 feet.
THURSDAY
Northwest winds 10 to 20 knots becoming southwest
5 to 15 knots by mid afternoon. Waves subsiding to calm to
2 feet.
THURSDAY NIGHT
South winds 5 to 15 knots backing east after
midnight. Waves calm to 2 feet.
FRIDAY
North winds 5 to 15 knots becoming northwest 15 to
25 knots. A chance of snow showers. Waves building to 2 to
4 feet.
SATURDAY
Northwest winds 15 to 25 knots becoming north 5 to
15 knots. Waves subsiding to calm to 2 feet.
LSZ264-191600
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border
347 AM EDT Tue Mar 19 2024
GALE WARNING IN EFFECT FROM 2 PM EDT THIS AFTERNOON THROUGH WEDNESDAY EVENING
HEAVY FREEZING SPRAY WARNING IN EFFECT FROM THIS EVENING THROUGH WEDNESDAY EVENING
EARLY THIS MORNING
West winds 15 to 25 knots. A slight chance
of snow. Waves 5 to 8 feet occasionally to 10 feet.
TODAY
Northwest winds 20 to 30 knots increasing to gales to
35 knots late. Isolated snow showers. Waves subsiding to 4 to
7 feet occasionally to 9 feet, then building to 6 to 9 feet
occasionally to 11 feet.
TONIGHT
Northwest gales to 40 knots veering north late. Heavy
freezing spray. A chance of snow showers. Waves building to 10 to
14 feet occasionally to 18 feet.
WEDNESDAY
North gales to 40 knots becoming northwest 20 to
30 knots late. Heavy freezing spray. A chance of snow showers.
Waves subsiding to 4 to 7 feet occasionally to 9 feet.
WEDNESDAY NIGHT
North winds 20 to 30 knots diminishing to
15 to 25 knots after midnight. Freezing spray through midnight. A
chance of snow showers. Waves subsiding to 2 to 4 feet.
THURSDAY
Northwest winds 10 to 20 knots becoming west 5 to
15 knots by mid afternoon. Waves subsiding to calm to 2 feet.
THURSDAY NIGHT
South winds 5 to 15 knots backing southeast
after midnight. Waves calm to 2 feet.
FRIDAY
Northwest winds 5 to 15 knots increasing to 15 to
25 knots. A chance of snow showers. Waves building to 3 to 6 feet
occasionally to 8 feet.
SATURDAY
Northwest winds 15 to 25 knots becoming north 5 to
15 knots. Waves subsiding to calm to 2 feet.
LSZ265-191600
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore
347 AM EDT Tue Mar 19 2024
GALE WARNING IN EFFECT FROM 2 PM EDT THIS AFTERNOON THROUGH WEDNESDAY EVENING
HEAVY FREEZING SPRAY WARNING IN EFFECT FROM THIS EVENING THROUGH WEDNESDAY EVENING
EARLY THIS MORNING
West winds 15 to 25 knots. A slight chance
of snow. Waves 2 to 4 feet.
TODAY
West winds 15 to 25 knots becoming northwest gales to
35 knots in the afternoon. Isolated snow showers. Waves building
to 6 to 9 feet occasionally to 11 feet.
TONIGHT
Northwest gales to 40 knots. Heavy freezing spray. A
chance of snow showers through midnight. Snow showers likely after
midnight. Waves building to 9 to 12 feet occasionally to 15 feet.
WEDNESDAY
Northwest gales to 40 knots diminishing to 20 to
30 knots late. Heavy freezing spray. Snow showers likely through
early afternoon. A chance of snow showers by mid afternoon. Waves
building to 10 to 14 feet occasionally to 18 feet, then subsiding
to 5 to 8 feet occasionally to 10 feet.
WEDNESDAY NIGHT
Northwest winds 15 to 25 knots. Freezing spray
through midnight. A chance of snow showers. Waves subsiding to
3 to 5 feet occasionally to 7 feet.
THURSDAY
Northwest winds 10 to 20 knots. Waves subsiding to
calm to 2 feet.
THURSDAY NIGHT
Southeast winds 5 to 15 knots becoming south
10 to 20 knots after midnight. A chance of snow showers after
midnight. Waves calm to 2 feet.
FRIDAY
Southeast winds 10 to 20 knots becoming northwest 15 to
25 knots. A chance of snow showers. Waves building to 3 to 5 feet
occasionally to 7 feet.
SATURDAY
Northwest winds 15 to 25 knots diminishing to 10 to
20 knots. Waves subsiding to calm to 2 feet.
LSZ266-191600
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
347 AM EDT Tue Mar 19 2024
GALE WARNING IN EFFECT FROM 2 PM EDT THIS AFTERNOON THROUGH WEDNESDAY EVENING
HEAVY FREEZING SPRAY WARNING IN EFFECT FROM THIS EVENING THROUGH WEDNESDAY EVENING
EARLY THIS MORNING
Southwest winds 15 to 25 knots. A chance of
snow. Waves 4 to 7 feet occasionally to 9 feet.
TODAY
West winds 15 to 25 knots becoming northwest 20 to
30 knots in the afternoon, then increasing to gales to 40 knots
late. Scattered snow showers. Waves subsiding to 3 to 6 feet
occasionally to 8 feet, then building to 9 to 12 feet
occasionally to 15 feet.
TONIGHT
Northwest gales to 45 knots. Heavy freezing spray.
Snow showers. Waves building to 12 to 17 feet occasionally to 21
feet.
WEDNESDAY
North gales to 45 knots becoming northwest gales to
40 knots in the afternoon. Heavy freezing spray. Snow showers
through early afternoon. A chance of snow showers by mid
afternoon. Waves subsiding to 9 to 12 feet occasionally to 15
feet.
WEDNESDAY NIGHT
Northwest gales to 35 knots becoming north
15 to 25 knots after midnight. Freezing spray. A chance of snow
showers. Waves subsiding to 3 to 6 feet occasionally to 8 feet.
THURSDAY
Northwest winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. Waves subsiding to 1 to 3 feet.
THURSDAY NIGHT
West winds 5 to 15 knots becoming south 10 to
20 knots after midnight. A chance of snow showers after midnight.
Waves subsiding to calm to 2 feet.
FRIDAY
Southeast winds 10 to 20 knots becoming northwest 15 to
25 knots. A chance of snow showers. Waves building to 3 to 6 feet
occasionally to 8 feet.
SATURDAY
Northwest winds 20 to 30 knots becoming north 10 to
20 knots. Waves building to 4 to 7 feet occasionally to 9 feet,
then subsiding to 1 to 3 feet.
LSZ267-191600
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border
347 AM EDT Tue Mar 19 2024
GALE WARNING IN EFFECT FROM 2 PM EDT THIS AFTERNOON THROUGH WEDNESDAY EVENING
HEAVY FREEZING SPRAY WARNING IN EFFECT FROM THIS EVENING THROUGH WEDNESDAY EVENING
EARLY THIS MORNING
Southwest winds 15 to 25 knots. Snow
likely. Waves 3 to 5 feet occasionally to 7 feet.
TODAY
Southwest winds 15 to 25 knots becoming west 20 to
30 knots in the afternoon, then becoming northwest gales to
35 knots late. Scattered snow showers. Waves building to 9 to
12 feet occasionally to 15 feet.
TONIGHT
Northwest gales to 40 knots. Snow showers. Heavy freezing
spray after midnight. Waves building to 12 to 17 feet
occasionally to 21 feet.
WEDNESDAY
North gales to 40 knots backing northwest late.
Heavy freezing spray. Snow showers likely. Waves subsiding to 9
to 12 feet occasionally to 15 feet.
WEDNESDAY NIGHT
Northwest gales to 40 knots becoming north
20 to 30 knots after midnight. Heavy freezing spray. A chance of
snow showers. Waves subsiding to 3 to 6 feet occasionally to 8
feet.
THURSDAY
North winds 15 to 25 knots becoming northwest 10 to
20 knots by mid afternoon. A chance of snow showers through early
afternoon. Waves subsiding to 1 to 3 feet.
THURSDAY NIGHT
Northwest winds 10 to 20 knots backing south
after midnight. Waves subsiding to calm to 2 feet.
FRIDAY
Southeast winds 10 to 20 knots becoming northwest 15 to
25 knots. Snow showers likely, then a chance of snow showers.
Waves building to 1 to 3 feet, then subsiding to calm to 2 feet.
SATURDAY
Northwest winds 20 to 30 knots becoming north 15 to
25 knots. Waves subsiding to 1 to 3 feet.
LSZ261-191600
MAFOR 1909/
Superior West...GALE WARNING AND HEAVY FREEZING SPRAY WARNING IN
EFFECT...11630 11730 13740 11752 11752 11752. Waves 4 to 7 feet
subsiding to 3 to 6 feet, then building to 4 to 7 feet today.
Waves 5 to 8 feet tonight.
Superior North Central...GALE WARNING AND HEAVY FREEZING SPRAY WARNING IN EFFECT...11630 13740 11752 11752 11752 11752. A chance of snow showers tonight. Waves 5 to 9 feet today. Waves 6 to 9 feet building to 10 to 13 feet tonight.
Superior South Central...GALE WARNING AND HEAVY FREEZING SPRAY WARNING IN EFFECT...12630 11740 13752 12752. Waves 2 to 4 feet building to 7 to 10 feet today. Waves 8 to 12 feet building to 10 to 15 feet tonight.
Superior East...GALE WARNING AND HEAVY FREEZING SPRAY WARNING IN EFFECT...11537 11530 19537 11630 19637 12752 19752 13752. Waves 3 to 5 feet building to 7 to 10 feet today. Waves 10 to 14 feet building to 11 to 16 feet tonight.
WFO MQT
Experimental modernized open lake forecast is available online at weather.gov/mqt/glftable
Graphical marine forecasts are available online at: weather.gov/greatlakes