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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
904
FZUS63 KMQT 190201
GLFLS
OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
1001 PM EDT SUN MAY 18 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 30.4 INCH HIGH PRESSURE OVER HUDSON BAY BUILDS TO
30.6 INCHES BY MID MORNING ON MONDAY, INCREASING RIDGING OVER LAKE
SUPERIOR TO 30.3 INCHES. RIDGING OVER THE LAKE WEAKENS TO 30.2
INCHES MONDAY 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.
LSZ162-190800-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
1001 PM EDT SUN MAY 18 2025 /901 PM CDT SUN MAY 18 2025/
...GALE WARNING IN EFFECT FROM MONDAY AFTERNOON THROUGH MONDAY
EVENING...
REST OF TONIGHT
NORTHEAST WINDS 10 TO 20 KNOTS. WAVES 1 TO
3 FEET.
MONDAY
EAST WINDS 15 TO 25 KNOTS INCREASING TO GALES TO
35 KNOTS IN THE AFTERNOON, THEN BACKING NORTHEAST LATE. WAVES
BUILDING TO 8 TO 11 FEET OCCASIONALLY TO 14 FEET.
MONDAY NIGHT
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 BY MID AFTERNOON. A SLIGHT CHANCE OF RAIN SHOWERS BY MID
AFTERNOON. WAVES BUILDING TO 10 TO 14 FEET OCCASIONALLY TO
18 FEET.
TUESDAY NIGHT
NORTHEAST GALES TO 35 KNOTS DIMINISHING TO 20 TO
30 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF RAIN SHOWERS. WAVES
SUBSIDING TO 4 TO 8 FEET OCCASIONALLY TO 10 FEET.
WEDNESDAY
NORTHEAST WINDS 20 TO 30 KNOTS DIMINISHING TO 10 TO
20 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.
LSZ263-190800-
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-
1001 PM EDT SUN MAY 18 2025
REST OF TONIGHT
NORTH WINDS 5 TO 15 KNOTS VEERING NORTHEAST
AFTER MIDNIGHT, THEN INCREASING TO 10 TO 20 KNOTS LATE. WAVES
1 TO 3 FEET SUBSIDING TO CALM TO 2 FEET, THEN BUILDING TO 1 TO
3 FEET.
MONDAY
EAST WINDS 15 TO 25 KNOTS BECOMING NORTHEAST 20 TO
30 KNOTS IN THE AFTERNOON. WAVES BUILDING TO 5 TO 8 FEET
OCCASIONALLY TO 10 FEET.
MONDAY NIGHT
EAST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS AFTER MIDNIGHT. 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 BECOMING NORTHEAST GALES TO
35 KNOTS BY MID AFTERNOON. A SLIGHT CHANCE OF RAIN SHOWERS BY MID
AFTERNOON. 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 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO 3 TO 5 FEET
OCCASIONALLY TO 7 FEET.
WEDNESDAY NIGHT
NORTH WINDS 5 TO 15 KNOTS. 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 BACKING NORTHWEST. WAVES
SUBSIDING TO CALM TO 2 FEET.
LSZ264-190800-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
1001 PM EDT SUN MAY 18 2025
REST OF TONIGHT
NORTH WINDS 5 TO 15 KNOTS BECOMING NORTHEAST
10 TO 20 KNOTS LATE. WAVES CALM TO 2 FEET BUILDING TO 1 TO
3 FEET.
MONDAY
NORTHEAST WINDS 10 TO 20 KNOTS. WAVES BUILDING TO 3 TO
5 FEET OCCASIONALLY TO 7 FEET, THEN SUBSIDING TO 1 TO 3 FEET.
MONDAY NIGHT
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 15 TO 25 KNOTS BACKING NORTHEAST BY MID
AFTERNOON. 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 15 TO 25 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 BECOMING NORTH 10 TO
20 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO 1 TO 3 FEET.
WEDNESDAY NIGHT
NORTH WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS AFTER MIDNIGHT. 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.
LSZ265-190800-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
1001 PM EDT SUN MAY 18 2025
REST OF TONIGHT
NORTH WINDS 10 TO 20 KNOTS VEERING NORTHEAST
LATE. WAVES 2 TO 4 FEET SUBSIDING TO 1 TO 3 FEET.
MONDAY
NORTHEAST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS IN THE AFTERNOON. WAVES BUILDING TO 2 TO 4 FEET, THEN
SUBSIDING TO 1 TO 3 FEET.
MONDAY NIGHT
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. WAVES SUBSIDING TO 2 TO
4 FEET.
TUESDAY NIGHT
NORTHEAST WINDS 15 TO 25 KNOTS INCREASING TO
20 TO 30 KNOTS AFTER MIDNIGHT. WAVES BUILDING 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 10 TO 20 KNOTS. WAVES SUBSIDING TO
1 TO 3 FEET.
THURSDAY
NORTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS. WAVES SUBSIDING TO CALM TO 2 FEET.
FRIDAY
NORTH WINDS 10 TO 20 KNOTS BACKING NORTHWEST. WAVES
CALM TO 2 FEET.
LSZ266-190800-
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-
1001 PM EDT SUN MAY 18 2025
REST OF TONIGHT
NORTH WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS AFTER MIDNIGHT, THEN VEERING NORTHEAST LATE. WAVES 2 TO
4 FEET SUBSIDING TO 1 TO 3 FEET, THEN BUILDING TO 2 TO 4 FEET.
MONDAY
NORTHEAST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS IN THE AFTERNOON, THEN BACKING NORTH LATE. WAVES
BUILDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET, THEN SUBSIDING TO
1 TO 3 FEET.
MONDAY NIGHT
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 15 TO 25 KNOTS BACKING NORTHEAST BY MID
AFTERNOON. WAVES SUBSIDING TO 2 TO 4 FEET.
TUESDAY NIGHT
NORTHEAST WINDS 15 TO 25 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.
LSZ267-190800-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
1001 PM EDT SUN MAY 18 2025
REST OF TONIGHT
NORTH WINDS 15 TO 25 KNOTS VEERING NORTHEAST
LATE. A SLIGHT CHANCE OF RAIN SHOWERS BY MIDNIGHT. WAVES 1 TO
3 FEET BUILDING TO 2 TO 4 FEET.
MONDAY
NORTHEAST WINDS 15 TO 25 KNOTS BECOMING NORTH 10 TO
20 KNOTS IN THE AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
MONDAY NIGHT
NORTHEAST WINDS 10 TO 20 KNOTS INCREASING TO
15 TO 25 KNOTS AFTER MIDNIGHT, THEN VEERING EAST LATE. WAVES
BUILDING TO 2 TO 4 FEET.
TUESDAY
EAST WINDS 10 TO 20 KNOTS BACKING NORTHEAST BY MID
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 DIMINISHING TO
10 TO 20 KNOTS AFTER MIDNIGHT. WAVES 2 TO 4 FEET.
THURSDAY
NORTH WINDS 15 TO 25 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.
LSZ261-190800-
MAFOR 1903/
SUPERIOR WEST...GALE WARNING IN EFFECT...12110 11120 11230 11240
12140 11240. WAVES 1 TO 2 FEET OVERNIGHT. WAVES 1 TO 3 FEET
BUILDING TO 5 TO 8 FEET MONDAY. WAVES 5 TO 8 FEET MONDAY EVENING.
SUPERIOR NORTH CENTRAL 11810 14120 11120 11110 11120. WAVES 1 TO
2 FEET OVERNIGHT. WAVES 2 TO 4 FEET MONDAY. WAVES 1 TO 2 FEET
MONDAY EVENING.
SUPERIOR SOUTH CENTRAL 12810 13120 13110. WAVES 2 TO 3 FEET
OVERNIGHT. WAVES 2 TO 4 FEET BUILDING TO 3 TO 5 FEET MONDAY.
WAVES 2 TO 3 FEET MONDAY EVENING.
SUPERIOR EAST 11820 14120 12810 11120. WAVES 2 TO 3 FEET
OVERNIGHT. WAVES 3 TO 5 FEET SUBSIDING TO 1 TO 3 FEET MONDAY.
WAVES 1 TO 3 FEET MONDAY EVENING.
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