602
FZUS63 KMQT 180205 CCA
GLFLS
OPEN LAKE FORECAST FOR LAKE SUPERIOR...CORRECTED
NATIONAL WEATHER SERVICE MARQUETTE MI
1005 PM EDT SUN MAY 17 2026
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 29.5 INCH LOW OVER THE PLAINS THIS EVENING WEAKENS TO 29.6 INCHES
AS IT PUSHES INTO LAKE SUPERIOR MONDAY MORNING. ANOTHER LOW PRESSURE
FOLLOWS IT, REACHING LAKE SUPERIOR BY TUESDAY MORNING AT 29.6
INCHES. AFTERWARDS, A 30.2 INCH HIGH OVER THE NORTHERN PLAINS BUILDS
TO 30.4 INCHES TUESDAY NIGHT INTO WEDNESDAY AS IT TRAVERSES
EASTWARDS INTO THE UPPER GREAT LAKES. THE HIGH PRESSURE SHIFTS EAST
ON THURSDAY WHILE LEAVING LINGERING RIDGING OF AT LEAST 30.1 INCHES
OVER LAKE SUPERIOR INTO FRIDAY.
LSZ162-180800-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
1005 PM EDT SUN MAY 17 2026 /905 PM CDT SUN MAY 17 2026/
...GALE WARNING IN EFFECT UNTIL 11 PM EDT /10 PM CDT/ THIS
EVENING...
REST OF TONIGHT
EAST WINDS 20 TO 30 KNOTS WITH A FEW GALE FORCE
GUSTS UP TO 35 KNOTS EARLY BACKING NORTHEAST AFTER MIDNIGHT, THEN
DIMINISHING TO 15 TO 25 KNOTS LATE. A CHANCE OF RAIN SHOWERS BY
MIDNIGHT, THEN RAIN SHOWERS LIKELY AND A SLIGHT CHANCE OF
THUNDERSTORMS AFTER MIDNIGHT. WAVES 7 TO 10 FEET OCCASIONALLY TO 13
FEET SUBSIDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
MONDAY
NORTH WINDS 10 TO 20 KNOTS BECOMING NORTHEAST 5 TO
15 KNOTS IN THE AFTERNOON, THEN INCREASING TO 10 TO 20 KNOTS
LATE. A SLIGHT CHANCE OF RAIN SHOWERS. WAVES SUBSIDING TO 2 TO
4 FEET.
MONDAY NIGHT
NORTHEAST WINDS 15 TO 25 KNOTS INCREASING TO
20 TO 30 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN SHOWERS AND A
SLIGHT CHANCE OF THUNDERSTORMS THROUGH MIDNIGHT, THEN RAIN
SHOWERS AFTER MIDNIGHT. WAVES BUILDING TO 6 TO 9 FEET
OCCASIONALLY TO 11 FEET.
TUESDAY
NORTH WINDS 20 TO 30 KNOTS BECOMING WEST 10 TO
20 KNOTS BY MID AFTERNOON. RAIN SHOWERS LIKELY THROUGH EARLY
AFTERNOON. WAVES SUBSIDING TO 2 TO 4 FEET.
TUESDAY NIGHT
NORTHWEST WINDS 5 TO 15 KNOTS. WAVES SUBSIDING
TO CALM TO 2 FEET.
WEDNESDAY
NORTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTH BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
WEDNESDAY NIGHT
SOUTHEAST WINDS 5 TO 15 KNOTS VEERING SOUTH
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
THURSDAY
EAST WINDS 5 TO 15 KNOTS VEERING SOUTH. WAVES
BUILDING TO 1 TO 3 FEET.
FRIDAY
SOUTH WINDS 5 TO 15 KNOTS BACKING EAST. WAVES SUBSIDING
TO CALM TO 2 FEET.
LSZ263-180800-
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-
1005 PM EDT SUN MAY 17 2026
REST OF TONIGHT
EAST WINDS 15 TO 25 KNOTS. A CHANCE OF RAIN
SHOWERS BY MIDNIGHT, THEN RAIN SHOWERS AND A CHANCE OF
THUNDERSTORMS AFTER MIDNIGHT. WAVES 4 TO 7 FEET OCCASIONALLY TO
9 FEET SUBSIDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.
MONDAY
NORTH WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO 15 KNOTS
IN THE AFTERNOON, THEN BECOMING NORTHEAST 10 TO 20 KNOTS LATE. A
SLIGHT CHANCE OF RAIN SHOWERS. WAVES SUBSIDING TO 2 TO 4 FEET.
MONDAY NIGHT
NORTHEAST WINDS 15 TO 25 KNOTS INCREASING TO
20 TO 30 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN SHOWERS THROUGH
MIDNIGHT. A SLIGHT CHANCE OF THUNDERSTORMS. RAIN SHOWERS AFTER
MIDNIGHT. WAVES BUILDING TO 6 TO 9 FEET OCCASIONALLY TO 11 FEET.
TUESDAY
NORTH WINDS 20 TO 30 KNOTS BECOMING NORTHWEST 15 TO
25 KNOTS BY MID AFTERNOON. RAIN SHOWERS LIKELY THROUGH EARLY
AFTERNOON. WAVES BUILDING TO 7 TO 10 FEET OCCASIONALLY TO
13 FEET, THEN SUBSIDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
TUESDAY NIGHT
NORTHWEST WINDS 10 TO 20 KNOTS DIMINISHING TO
5 TO 15 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
WEDNESDAY
NORTHWEST WINDS 5 TO 15 KNOTS BECOMING SOUTHWEST
10 TO 20 KNOTS BY MID AFTERNOON. WAVES BUILDING TO 1 TO 3 FEET.
WEDNESDAY NIGHT
SOUTH WINDS 5 TO 15 KNOTS. WAVES SUBSIDING TO
CALM TO 2 FEET.
THURSDAY
SOUTH WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS. WAVES BUILDING TO 2 TO 4 FEET, THEN SUBSIDING TO 1 TO
3 FEET.
FRIDAY
SOUTH WINDS 5 TO 15 KNOTS BACKING SOUTHEAST. WAVES
SUBSIDING TO CALM TO 2 FEET.
LSZ264-180800-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
1005 PM EDT SUN MAY 17 2026
REST OF TONIGHT
EAST WINDS 15 TO 25 KNOTS. A SLIGHT CHANCE OF
RAIN SHOWERS BY MIDNIGHT, THEN RAIN SHOWERS AND A CHANCE OF
THUNDERSTORMS AFTER MIDNIGHT. WAVES 2 TO 4 FEET BUILDING TO 3 TO
6 FEET OCCASIONALLY TO 8 FEET.
MONDAY
EAST WINDS 10 TO 20 KNOTS BECOMING NORTH 5 TO 15 KNOTS
IN THE AFTERNOON, THEN INCREASING TO 10 TO 20 KNOTS LATE. A
CHANCE OF RAIN SHOWERS THROUGH EARLY AFTERNOON. WAVES SUBSIDING
TO 2 TO 4 FEET.
MONDAY NIGHT
NORTHEAST WINDS 15 TO 25 KNOTS INCREASING TO
20 TO 30 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN SHOWERS THROUGH
MIDNIGHT. A SLIGHT CHANCE OF THUNDERSTORMS. RAIN SHOWERS AFTER
MIDNIGHT. WAVES BUILDING TO 6 TO 9 FEET OCCASIONALLY TO 11 FEET.
TUESDAY
NORTH WINDS 20 TO 30 KNOTS BACKING NORTHWEST BY MID
AFTERNOON. RAIN SHOWERS THROUGH EARLY AFTERNOON. WAVES BUILDING
TO 7 TO 10 FEET OCCASIONALLY TO 13 FEET, THEN SUBSIDING TO 4 TO
7 FEET OCCASIONALLY TO 9 FEET.
TUESDAY NIGHT
NORTH WINDS 15 TO 25 KNOTS BECOMING NORTHWEST
10 TO 20 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO 2 TO 4 FEET.
WEDNESDAY
NORTHWEST WINDS 10 TO 20 KNOTS BECOMING SOUTHWEST
5 TO 15 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO CALM TO
2 FEET.
WEDNESDAY NIGHT
SOUTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTH
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
THURSDAY
SOUTH WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS. WAVES BUILDING TO 2 TO 4 FEET.
FRIDAY
SOUTHEAST WINDS 5 TO 15 KNOTS. WAVES SUBSIDING TO 1 TO
3 FEET.
LSZ265-180800-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
1005 PM EDT SUN MAY 17 2026
REST OF TONIGHT
EAST WINDS 15 TO 25 KNOTS VEERING SOUTHEAST
LATE. A CHANCE OF RAIN SHOWERS BY MIDNIGHT, THEN RAIN SHOWERS AND
A CHANCE OF THUNDERSTORMS AFTER MIDNIGHT. WAVES 2 TO 4 FEET
BUILDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.
MONDAY
SOUTHEAST WINDS 10 TO 20 KNOTS VEERING NORTHWEST IN THE
AFTERNOON, THEN BECOMING NORTH 15 TO 25 KNOTS LATE. A SLIGHT
CHANCE OF SHOWERS. WAVES SUBSIDING TO 1 TO 3 FEET.
MONDAY NIGHT
NORTH WINDS 10 TO 20 KNOTS VEERING NORTHEAST
AFTER MIDNIGHT. A CHANCE OF RAIN SHOWERS THROUGH MIDNIGHT. A
SLIGHT CHANCE OF THUNDERSTORMS. RAIN SHOWERS AFTER MIDNIGHT.
WAVES BUILDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
TUESDAY
NORTHWEST WINDS 20 TO 30 KNOTS INCREASING TO GALES TO
35 KNOTS BY MID AFTERNOON. RAIN SHOWERS AND A SLIGHT CHANCE OF
THUNDERSTORMS THROUGH EARLY AFTERNOON. WAVES BUILDING TO 6 TO
9 FEET OCCASIONALLY TO 11 FEET.
TUESDAY NIGHT
NORTHWEST WINDS 20 TO 30 KNOTS DIMINISHING TO
15 TO 25 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO 3 TO 6 FEET
OCCASIONALLY TO 8 FEET.
WEDNESDAY
NORTHWEST WINDS 10 TO 20 KNOTS BECOMING NORTH 5 TO
15 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
WEDNESDAY NIGHT
SOUTH WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
THURSDAY
SOUTHEAST WINDS 10 TO 20 KNOTS BECOMING SOUTH 15 TO
25 KNOTS. WAVES BUILDING TO 2 TO 4 FEET, THEN SUBSIDING TO 1 TO
3 FEET.
FRIDAY
SOUTHEAST WINDS 10 TO 20 KNOTS VEERING SOUTH. WAVES
BUILDING TO 2 TO 4 FEET, THEN SUBSIDING TO 1 TO 3 FEET.
LSZ266-180800-
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-
1005 PM EDT SUN MAY 17 2026
REST OF TONIGHT
EAST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO
30 KNOTS AFTER MIDNIGHT, THEN VEERING SOUTHEAST LATE. A CHANCE OF
RAIN SHOWERS BY MIDNIGHT, THEN RAIN SHOWERS AND A CHANCE OF
THUNDERSTORMS AFTER MIDNIGHT. WAVES 2 TO 4 FEET BUILDING TO 4 TO
7 FEET OCCASIONALLY TO 9 FEET, THEN SUBSIDING TO 3 TO 6 FEET
OCCASIONALLY TO 8 FEET.
MONDAY
SOUTH WINDS 10 TO 20 KNOTS BACKING NORTH LATE. A SLIGHT
CHANCE OF THUNDERSTORMS THROUGH EARLY AFTERNOON. A CHANCE OF
SHOWERS. WAVES SUBSIDING TO 2 TO 4 FEET, THEN BUILDING TO 3 TO
5 FEET OCCASIONALLY TO 7 FEET.
MONDAY NIGHT
NORTH WINDS 15 TO 25 KNOTS VEERING NORTHEAST
AFTER MIDNIGHT, THEN BECOMING EAST 20 TO 30 KNOTS LATE. A CHANCE
OF RAIN SHOWERS THROUGH MIDNIGHT. A SLIGHT CHANCE OF
THUNDERSTORMS. RAIN SHOWERS AFTER MIDNIGHT. WAVES BUILDING TO
4 TO 7 FEET OCCASIONALLY TO 9 FEET, THEN SUBSIDING TO 3 TO 6 FEET
OCCASIONALLY TO 8 FEET.
TUESDAY
NORTH WINDS 20 TO 30 KNOTS BECOMING NORTHWEST GALES TO
35 KNOTS BY MID AFTERNOON. RAIN SHOWERS THROUGH EARLY AFTERNOON.
A SLIGHT CHANCE OF THUNDERSTORMS. A SLIGHT CHANCE OF RAIN SHOWERS
BY MID AFTERNOON. WAVES BUILDING TO 7 TO 11 FEET OCCASIONALLY TO
14 FEET.
TUESDAY NIGHT
NORTHWEST WINDS 20 TO 30 KNOTS. WAVES SUBSIDING
TO 5 TO 8 FEET OCCASIONALLY TO 10 FEET.
WEDNESDAY
NORTHWEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO 1 TO 3 FEET.
WEDNESDAY NIGHT
WEST WINDS 5 TO 15 KNOTS BACKING SOUTH AFTER
MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
THURSDAY
SOUTH WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS. WAVES BUILDING TO 2 TO 4 FEET.
FRIDAY
SOUTHEAST WINDS 15 TO 25 KNOTS BECOMING SOUTH 10 TO
20 KNOTS. WAVES SUBSIDING TO 1 TO 3 FEET, THEN BUILDING TO 2 TO
4 FEET.
LSZ267-180800-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
1005 PM EDT SUN MAY 17 2026
REST OF TONIGHT
SOUTHEAST WINDS 20 TO 30 KNOTS BACKING EAST
AFTER MIDNIGHT, THEN VEERING SOUTHEAST LATE. RAIN SHOWERS. A
CHANCE OF THUNDERSTORMS AFTER MIDNIGHT. WAVES 2 TO 4 FEET
BUILDING TO 4 TO 7 FEET OCCASIONALLY TO 9 FEET, THEN SUBSIDING TO
3 TO 6 FEET OCCASIONALLY TO 8 FEET.
MONDAY
SOUTHEAST WINDS 15 TO 25 KNOTS BECOMING SOUTH 10 TO
20 KNOTS IN THE AFTERNOON, THEN VEERING NORTHWEST LATE. SHOWERS
LIKELY AND A SLIGHT CHANCE OF THUNDERSTORMS THROUGH EARLY
AFTERNOON, THEN A SLIGHT CHANCE OF SHOWERS BY MID AFTERNOON.
WAVES SUBSIDING TO CALM TO 2 FEET.
MONDAY NIGHT
WEST WINDS 5 TO 15 KNOTS BECOMING NORTHEAST 10 TO
20 KNOTS AFTER MIDNIGHT, THEN BECOMING SOUTHEAST 15 TO 25 KNOTS
LATE. A CHANCE OF RAIN SHOWERS THROUGH MIDNIGHT. A SLIGHT CHANCE
OF THUNDERSTORMS. RAIN SHOWERS LIKELY AFTER MIDNIGHT. WAVES
BUILDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
TUESDAY
SOUTH WINDS 20 TO 30 KNOTS BECOMING WEST GALES TO
35 KNOTS BY MID AFTERNOON. RAIN SHOWERS THROUGH EARLY AFTERNOON.
A SLIGHT CHANCE OF THUNDERSTORMS. A SLIGHT CHANCE OF RAIN SHOWERS
BY MID AFTERNOON. WAVES BUILDING TO 8 TO 11 FEET OCCASIONALLY TO
14 FEET.
TUESDAY NIGHT
NORTHWEST GALES TO 35 KNOTS DIMINISHING TO 20 TO
30 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO 5 TO 8 FEET
OCCASIONALLY TO 10 FEET.
WEDNESDAY
NORTHWEST WINDS 20 TO 30 KNOTS DIMINISHING TO 10 TO
20 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO 2 TO 4 FEET.
WEDNESDAY NIGHT
WEST WINDS 5 TO 15 KNOTS BACKING SOUTH AFTER
MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
THURSDAY
SOUTHEAST WINDS 5 TO 15 KNOTS. WAVES BUILDING TO 1 TO
3 FEET.
FRIDAY
SOUTHEAST WINDS 10 TO 20 KNOTS. WAVES SUBSIDING TO CALM
TO 2 FEET.
LSZ261-180800-
MAFOR 1803/
SUPERIOR WEST 11140 19150 11136 11126 12120 11110 11120 11130. A
CHANCE OF THUNDERSTORMS OVERNIGHT AND MONDAY MORNING. WAVES 5 TO 8
FEET OVERNIGHT. WAVES 3 TO 6 FEET MONDAY. WAVES 2 TO 4 FEET BUILDING
TO 3 TO 5 FEET MONDAY EVENING.
SUPERIOR NORTH CENTRAL 12230 11236 11310 13820 11130. A CHANCE OF
THUNDERSTORMS OVERNIGHT AND MONDAY MORNING. WAVES 2 TO 3 FEET
BUILDING TO 3 TO 6 FEET OVERNIGHT. WAVES 3 TO 6 FEET MONDAY AND
MONDAY EVENING.
SUPERIOR SOUTH CENTRAL 11230 11346 11336 11320 11520 11720 12820.
A CHANCE OF THUNDERSTORMS OVERNIGHT AND MONDAY MORNING. WAVES 3
TO 6 FEET OVERNIGHT. WAVES 3 TO 6 FEET SUBSIDING TO 2 TO 3 FEET
MONDAY. WAVES 2 TO 4 FEET MONDAY EVENING.
SUPERIOR EAST 12246 12336 11420 11510 11710 11820. A CHANCE OF
THUNDERSTORMS OVERNIGHT AND MONDAY MORNING. WAVES 3 TO 6 FEET
BUILDING TO 5 TO 7 FEET OVERNIGHT. WAVES 4 TO 7 FEET SUBSIDING TO
2 TO 4 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
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