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Marine Weather Forecast from Environment Canada
WindsIssued 03:00 AM EDT 19 May 2025 |
Today Tonight and Tuesday. Strong wind warning in effect. Wind northeast 15 knots increasing to northeast 20 early this morning then diminishing to northeast 15 near noon. Wind increasing to northeast 20 this evening then diminishing to northeast 15 near noon Tuesday. Wind increasing to northeast 20 Tuesday evening. |
Extended Forecast
Issued 06:30 PM EDT 18 May 2025
Tuesday
Wind northeast 20 knots.
Wednesday
Wind northeast 20 knots.
Thursday
Wind north 15 knots.
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WavesIssued 03:00 AM EDT 19 May 2025 |
Today Tonight and Tuesday. Waves 1 to 1.5 metres. |
Lake Superior Mafor Forecast and Weather Conditions
From NOAA National Weather Service Weather Forecast Office
486
FZUS63 KMQT 190812
GLFLS
OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
412 AM EDT MON MAY 19 2025
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 30.5 INCH HIGH PRESSURE OVER HUDSON BAY BUILDS TO 30.6
INCHES BY MID MORNING AS RIDGING OVER LAKE SUPERIOR WEAKENS TO 30.2
INCHES THIS EVENING. A 29.4 INCH LOW OVER THE MID-MISSISSIPPI VALLEY
ON TUESDAY PUSHES EASTWARD THROUGH THE DAY AND INTO THE OHIO
VALLEY/LOWER GREAT LAKES BY WEDNESDAY MORNING; THIS IN TURN
DECREASES RIDGING OVER LAKE SUPERIOR TO 30.1 INCHES BY TUESDAY
NIGHT. THIS LOW THEN MAY EXTEND A 30.0 INCH TROUGH OVER THE LAKE ON
THURSDAY BEFORE IT SHIFTS OFF INTO THE ATLANTIC. BY FRIDAY, THE NOW
30.5 INCH HIGH PRESSURE OVER HUDSON BAY BRINGS 30.2 INCH RIDGING
BACK OVER LAKE SUPERIOR.
LSZ162-191615-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
412 AM EDT MON MAY 19 2025 /312 AM CDT MON MAY 19 2025/
...GALE WARNING IN EFFECT FROM NOON EDT /11 AM CDT/ TODAY THROUGH
THIS EVENING...
EARLY THIS MORNING
EAST WINDS 15 TO 25 KNOTS. WAVES 1 TO
3 FEET.
TODAY
EAST WINDS 20 TO 30 KNOTS INCREASING TO GALES TO
35 KNOTS IN THE AFTERNOON. WAVES BUILDING TO 8 TO 11 FEET
OCCASIONALLY TO 14 FEET.
TONIGHT
EAST GALES TO 35 KNOTS DIMINISHING TO 20 TO 30 KNOTS
AFTER MIDNIGHT. WAVES SUBSIDING TO 4 TO 8 FEET OCCASIONALLY TO
10 FEET.
TUESDAY
EAST GALES TO 35 KNOTS BECOMING NORTHEAST GALES TO
40 KNOTS IN THE AFTERNOON. WAVES BUILDING TO 10 TO 14 FEET
OCCASIONALLY TO 18 FEET.
TUESDAY NIGHT
NORTHEAST GALES TO 40 KNOTS DIMINISHING TO 20 TO
30 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF RAIN SHOWERS. WAVES
SUBSIDING TO 5 TO 8 FEET OCCASIONALLY TO 10 FEET.
WEDNESDAY
NORTHEAST WINDS TO 30 KNOTS WITH A FEW GALE FORCE
GUSTS UP TO 35 KNOTS POSSIBLE DIMINISHING TO 20 TO 30 KNOTS BY
MID AFTERNOON. WAVES SUBSIDING TO 3 TO 5 FEET OCCASIONALLY TO 7
FEET.
WEDNESDAY NIGHT
NORTH WINDS 10 TO 20 KNOTS. WAVES SUBSIDING TO
CALM TO 2 FEET.
THURSDAY
NORTHEAST WINDS 5 TO 15 KNOTS BACKING NORTH. WAVES
CALM TO 2 FEET.
FRIDAY
NORTH WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
LSZ263-191615-
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-
412 AM EDT MON MAY 19 2025
...GALE WATCH IN EFFECT FROM TUESDAY MORNING THROUGH TUESDAY
AFTERNOON...
EARLY THIS MORNING
EAST WINDS 10 TO 20 KNOTS. WAVES CALM TO
2 FEET BUILDING TO 1 TO 3 FEET.
TODAY
EAST WINDS 15 TO 25 KNOTS BECOMING NORTHEAST 20 TO
30 KNOTS IN THE AFTERNOON, THEN BECOMING EAST TO 30 KNOTS WITH A
FEW GALE FORCE GUSTS TO 35 KNOTS POSSIBLE LATE. WAVES BUILDING TO
5 TO 8 FEET OCCASIONALLY TO 10 FEET.
TONIGHT
EAST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS AFTER MIDNIGHT, THEN INCREASING TO 20 TO 30 KNOTS LATE.
WAVES SUBSIDING TO 2 TO 4 FEET, THEN BUILDING TO 4 TO 7 FEET
OCCASIONALLY TO 9 FEET.
TUESDAY
EAST WINDS 20 TO 30 KNOTS INCREASING TO GALES OF 35
KNOTS IN THE AFTERNOON, THEN BACKING NORTHEAST LATE. WAVES
BUILDING TO 7 TO 10 FEET OCCASIONALLY TO 13 FEET.
TUESDAY NIGHT
NORTHEAST WINDS 20 TO 30 KNOTS. A SLIGHT CHANCE
OF RAIN SHOWERS. WAVES SUBSIDING TO 3 TO 6 FEET OCCASIONALLY TO
8 FEET, THEN BUILDING TO 5 TO 8 FEET OCCASIONALLY TO 10 FEET.
WEDNESDAY
NORTHEAST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO 3 TO 5 FEET
OCCASIONALLY TO 7 FEET.
WEDNESDAY NIGHT
NORTH WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET.
THURSDAY
NORTH WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS. WAVES BUILDING TO 2 TO 4 FEET, THEN SUBSIDING TO 1 TO
3 FEET.
FRIDAY
NORTH WINDS 5 TO 15 KNOTS. WAVES SUBSIDING TO CALM TO
2 FEET.
LSZ264-191615-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
412 AM EDT MON MAY 19 2025
EARLY THIS MORNING
NORTHEAST WINDS 10 TO 20 KNOTS. WAVES CALM
TO 2 FEET BUILDING TO 1 TO 3 FEET.
TODAY
NORTHEAST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS LATE. WAVES BUILDING TO 3 TO 5 FEET OCCASIONALLY TO
7 FEET, THEN SUBSIDING TO 1 TO 3 FEET.
TONIGHT
NORTHEAST WINDS 5 TO 15 KNOTS BECOMING EAST 15 TO
25 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET, THEN
BUILDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.
TUESDAY
EAST WINDS 20 TO 30 KNOTS BACKING NORTHEAST LATE.
WAVES BUILDING TO 4 TO 7 FEET OCCASIONALLY TO 9 FEET, THEN
SUBSIDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
TUESDAY NIGHT
NORTHEAST WINDS 20 TO 30 KNOTS. WAVES SUBSIDING
TO 2 TO 4 FEET, THEN BUILDING TO 4 TO 7 FEET OCCASIONALLY TO
9 FEET.
WEDNESDAY
NORTHEAST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO 1 TO 3 FEET.
WEDNESDAY NIGHT
NORTH WINDS 10 TO 20 KNOTS. WAVES BUILDING TO
2 TO 4 FEET.
THURSDAY
NORTH WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS. WAVES SUBSIDING TO 1 TO 3 FEET.
FRIDAY
NORTH WINDS 5 TO 15 KNOTS. WAVES SUBSIDING TO CALM TO
2 FEET.
LSZ265-191615-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
412 AM EDT MON MAY 19 2025
EARLY THIS MORNING
NORTHEAST WINDS 15 TO 25 KNOTS. WAVES 1 TO
3 FEET.
TODAY
NORTHEAST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS LATE. WAVES BUILDING TO 3 TO 5 FEET OCCASIONALLY TO
7 FEET, THEN SUBSIDING TO 1 TO 3 FEET.
TONIGHT
NORTHEAST WINDS 10 TO 20 KNOTS BECOMING EAST 15 TO
25 KNOTS AFTER MIDNIGHT, THEN INCREASING TO 20 TO 30 KNOTS LATE.
WAVES SUBSIDING TO CALM TO 2 FEET, THEN BUILDING TO 3 TO 6 FEET
OCCASIONALLY TO 8 FEET.
TUESDAY
EAST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS LATE. WAVES SUBSIDING TO 2 TO 4 FEET.
TUESDAY NIGHT
EAST WINDS 20 TO 30 KNOTS. WAVES BUILDING TO
3 TO 6 FEET OCCASIONALLY TO 8 FEET.
WEDNESDAY
NORTHEAST WINDS 15 TO 25 KNOTS BECOMING NORTH 10 TO
20 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO 2 TO 4 FEET.
WEDNESDAY NIGHT
NORTH WINDS 10 TO 20 KNOTS. WAVES SUBSIDING TO
1 TO 3 FEET.
THURSDAY
NORTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS. A CHANCE OF RAIN SHOWERS. WAVES SUBSIDING TO CALM TO
2 FEET.
FRIDAY
NORTH WINDS 10 TO 20 KNOTS BACKING NORTHWEST. WAVES
CALM TO 2 FEET.
LSZ266-191615-
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-
412 AM EDT MON MAY 19 2025
EARLY THIS MORNING
NORTHEAST WINDS 15 TO 25 KNOTS. WAVES 2 TO
4 FEET.
TODAY
NORTHEAST WINDS 15 TO 25 KNOTS DIMINISHING TO 5 TO
15 KNOTS. WAVES BUILDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET,
THEN SUBSIDING TO 1 TO 3 FEET.
TONIGHT
NORTHEAST WINDS 10 TO 20 KNOTS BECOMING EAST 15 TO
25 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET, THEN
BUILDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.
TUESDAY
EAST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS IN THE AFTERNOON, THEN BACKING NORTHEAST LATE. WAVES
SUBSIDING TO 2 TO 4 FEET.
TUESDAY NIGHT
NORTHEAST WINDS 20 TO 30 KNOTS. WAVES BUILDING
TO 4 TO 7 FEET OCCASIONALLY TO 9 FEET, THEN SUBSIDING TO 3 TO
6 FEET OCCASIONALLY TO 8 FEET.
WEDNESDAY
NORTHEAST WINDS 15 TO 25 KNOTS BACKING NORTH BY MID
AFTERNOON. WAVES SUBSIDING TO 2 TO 4 FEET.
WEDNESDAY NIGHT
NORTH WINDS 15 TO 25 KNOTS. WAVES 2 TO 4 FEET.
THURSDAY
NORTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS. A CHANCE OF RAIN SHOWERS. WAVES 2 TO 4 FEET.
FRIDAY
NORTH WINDS 10 TO 20 KNOTS. WAVES SUBSIDING TO CALM TO
2 FEET.
LSZ267-191615-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
412 AM EDT MON MAY 19 2025
EARLY THIS MORNING
NORTHEAST WINDS 15 TO 25 KNOTS. WAVES 1 TO
3 FEET BUILDING TO 2 TO 4 FEET.
TODAY
NORTHEAST WINDS 15 TO 25 KNOTS BECOMING NORTH 10 TO
20 KNOTS IN THE AFTERNOON. WAVES BUILDING TO 3 TO 5 FEET
OCCASIONALLY TO 7 FEET, THEN SUBSIDING TO CALM TO 2 FEET.
TONIGHT
NORTHEAST WINDS 10 TO 20 KNOTS VEERING EAST AFTER
MIDNIGHT, THEN INCREASING TO 15 TO 25 KNOTS LATE. WAVES BUILDING
TO 2 TO 4 FEET.
TUESDAY
EAST WINDS 10 TO 20 KNOTS BACKING NORTHEAST IN THE
AFTERNOON. WAVES SUBSIDING TO 1 TO 3 FEET.
TUESDAY NIGHT
NORTHEAST WINDS 15 TO 25 KNOTS. WAVES BUILDING
TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
WEDNESDAY
NORTHEAST WINDS 15 TO 25 KNOTS BACKING NORTH BY MID
AFTERNOON. WAVES SUBSIDING TO 2 TO 4 FEET.
WEDNESDAY NIGHT
NORTH WINDS 15 TO 25 KNOTS. WAVES 2 TO 4 FEET.
THURSDAY
NORTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS. A CHANCE OF RAIN SHOWERS. WAVES 2 TO 4 FEET.
FRIDAY
NORTH WINDS 10 TO 20 KNOTS. A CHANCE OF RAIN SHOWERS.
WAVES SUBSIDING TO CALM TO 2 FEET.
LSZ261-191615-
MAFOR 1909 AMD/
SUPERIOR WEST...GALE WARNING IN EFFECT...11220 11230 15240 19250.
WAVES 1 TO 3 FEET BUILDING TO 5 TO 8 FEET TODAY. WAVES 5 TO 8
FEET TONIGHT.
SUPERIOR NORTH CENTRAL 11120 12130 11120 12110 12230. WAVES 2 TO
4 FEET TODAY. WAVES 1 TO 3 FEET BUILDING TO 3 TO 5 FEET TONIGHT.
SUPERIOR SOUTH CENTRAL 11120 11130 12120 12110 12230. WAVES 2 TO
4 FEET BUILDING TO 3 TO 5 FEET.
SUPERIOR EAST 13130 11120 11820 11120 11130 11230. WAVES 2 TO 4
FEET BUILDING TO 3 TO 5 FEET, THEN SUBSIDING TO 1 TO 3 FEET
TODAY. WAVES 1 TO 3 FEET BUILDING TO 2 TO 4 FEET TONIGHT.
TAP
EXPERIMENTAL MODERNIZED OPEN LAKE FORECAST IS AVAILABLE ONLINE AT
WEATHER.GOV/MQT/GLFTABLE
GRAPHICAL MARINE FORECASTS ARE AVAILABLE ONLINE AT:
WEATHER.GOV/GREATLAKES