150
FZUS63 KMQT 170202
GLFLS
OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
1001 PM EDT SAT MAY 16 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
RIDGING BUILDS TO 30.1 INCHES BY SUNDAY MORNING OVER LAKE SUPERIOR
AS THE 30.2 INCH PARENT HIGH MOVES INTO NORTHERN ONTARIO. THIS RIDGE
IS FOLLOWED BY A 29.7 INCH TROUGH EXTENDING NORTHEAST OVER THE UPPER
GREAT LAKES FROM THE CENTRAL PLAINS BY EARLY MONDAY. A LOW OF AROUND
29.6 INCHES THEN MOVES OVER LAKE SUPERIOR ON TUESDAY BEFORE RIDGING
OF 30.2 TO 30.3 INCHES BUILDS BACK OVER THE LAKE WEDNESDAY; THE
RIDGING MAY INCREASE TO 30.4 INCHES OVER THE UPPER GREAT LAKES BY
THURSDAY AS IT CONTINUES EAST TOWARDS THE ST. LAWRENCE SEAWAY.
LSZ162-170800-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
1001 PM EDT SAT MAY 16 2026 /901 PM CDT SAT MAY 16 2026/
REST OF TONIGHT
NORTH WINDS 5 TO 15 KNOTS BECOMING NORTHEAST
10 TO 20 KNOTS AFTER MIDNIGHT, THEN BECOMING EAST 15 TO 25 KNOTS
LATE. WAVES CALM TO 2 FEET BUILDING TO 2 TO 4 FEET.
SUNDAY
EAST WINDS 20 TO 30 KNOTS BECOMING NORTHEAST TO
30 KNOTS WITH A FEW GALE FORCE GUSTS TO 35 KNOTS POSSIBLE IN THE
AFTERNOON. A CHANCE OF RAIN SHOWERS BY MID AFTERNOON. WAVES
BUILDING TO 7 TO 10 FEET OCCASIONALLY TO 13 FEET.
SUNDAY NIGHT
NORTHEAST WINDS TO 30 KNOTS WITH A FEW GALE FORCE
GUSTS TO 35 KNOTS POSSIBLE DIMINISHING TO 15 TO 25 KNOTS. RAIN
SHOWERS AND A CHANCE OF THUNDERSTORMS. WAVES BUILDING TO 8 TO
11 FEET OCCASIONALLY TO 14 FEET, THEN SUBSIDING TO 3 TO 6 FEET
OCCASIONALLY TO 8 FEET.
MONDAY
NORTHEAST WINDS 10 TO 20 KNOTS. RAIN SHOWERS LIKELY
THROUGH EARLY AFTERNOON. A SLIGHT CHANCE OF THUNDERSTORMS. A
CHANCE OF RAIN SHOWERS BY MID AFTERNOON. WAVES SUBSIDING TO 2 TO
4 FEET, THEN BUILDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
MONDAY NIGHT
NORTHEAST WINDS 20 TO 30 KNOTS. A CHANCE OF RAIN
SHOWERS THROUGH MIDNIGHT. A SLIGHT CHANCE OF THUNDERSTORMS. RAIN
SHOWERS AFTER MIDNIGHT. WAVES BUILDING TO 8 TO 11 FEET
OCCASIONALLY TO 14 FEET.
TUESDAY
NORTHEAST WINDS 20 TO 30 KNOTS BECOMING NORTH 15 TO
25 KNOTS BY MID AFTERNOON. RAIN SHOWERS THROUGH EARLY AFTERNOON.
WAVES BUILDING TO 9 TO 12 FEET OCCASIONALLY TO 15 FEET, THEN
SUBSIDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.
TUESDAY NIGHT
NORTH 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 BACKING WEST. WAVES
CALM TO 2 FEET.
THURSDAY
SOUTH WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
LSZ263-170800-
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 SAT MAY 16 2026
REST OF TONIGHT
NORTH WINDS 5 TO 15 KNOTS VEERING NORTHEAST
AFTER MIDNIGHT. WAVES 1 TO 3 FEET SUBSIDING TO CALM TO 2 FEET.
SUNDAY
EAST WINDS 10 TO 20 KNOTS INCREASING TO 20 TO 30 KNOTS
IN THE AFTERNOON. A CHANCE OF RAIN SHOWERS BY MID AFTERNOON.
WAVES BUILDING TO 5 TO 8 FEET OCCASIONALLY TO 10 FEET.
SUNDAY NIGHT
EAST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS AFTER MIDNIGHT, THEN BACKING NORTHEAST LATE. RAIN
SHOWERS AND A CHANCE OF THUNDERSTORMS. WAVES SUBSIDING TO 3 TO
6 FEET OCCASIONALLY TO 8 FEET, THEN BUILDING TO 4 TO 7 FEET
OCCASIONALLY TO 9 FEET.
MONDAY
NORTH WINDS 10 TO 20 KNOTS VEERING NORTHEAST BY MID
AFTERNOON. RAIN SHOWERS THROUGH EARLY AFTERNOON. A SLIGHT CHANCE
OF THUNDERSTORMS. A CHANCE OF RAIN SHOWERS BY MID AFTERNOON.
WAVES SUBSIDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
MONDAY NIGHT
NORTHEAST WINDS 20 TO 30 KNOTS. A CHANCE OF RAIN
SHOWERS AND A SLIGHT CHANCE OF THUNDERSTORMS THROUGH MIDNIGHT,
THEN RAIN SHOWERS AFTER MIDNIGHT. WAVES BUILDING TO 8 TO 11 FEET
OCCASIONALLY TO 14 FEET.
TUESDAY
NORTH WINDS 20 TO 30 KNOTS. RAIN SHOWERS LIKELY
THROUGH EARLY AFTERNOON. WAVES BUILDING TO 9 TO 12 FEET
OCCASIONALLY TO 15 FEET, THEN SUBSIDING TO 5 TO 8 FEET
OCCASIONALLY TO 10 FEET.
TUESDAY NIGHT
NORTH WINDS 15 TO 25 KNOTS. WAVES SUBSIDING TO
3 TO 5 FEET OCCASIONALLY TO 7 FEET.
WEDNESDAY
SOUTHWEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS. WAVES SUBSIDING TO CALM TO 2 FEET.
THURSDAY
SOUTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTH. WAVES
CALM TO 2 FEET.
LSZ264-170800-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
1001 PM EDT SAT MAY 16 2026
REST OF TONIGHT
NORTH WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS AFTER MIDNIGHT, THEN VEERING NORTHEAST LATE. WAVES 2 TO
4 FEET SUBSIDING TO CALM TO 2 FEET.
SUNDAY
EAST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO 20 KNOTS
IN THE AFTERNOON. A SLIGHT CHANCE OF RAIN SHOWERS BY MID
AFTERNOON. WAVES BUILDING TO 2 TO 4 FEET, THEN SUBSIDING TO 1 TO
3 FEET.
SUNDAY NIGHT
EAST WINDS 15 TO 25 KNOTS. RAIN SHOWERS AND A
CHANCE OF THUNDERSTORMS. WAVES BUILDING TO 4 TO 7 FEET
OCCASIONALLY TO 9 FEET.
MONDAY
NORTH WINDS 10 TO 20 KNOTS INCREASING TO 15 TO 25 KNOTS
BY MID AFTERNOON. RAIN SHOWERS THROUGH EARLY AFTERNOON. A SLIGHT
CHANCE OF THUNDERSTORMS. A CHANCE OF RAIN SHOWERS BY MID
AFTERNOON. WAVES SUBSIDING TO 3 TO 5 FEET OCCASIONALLY TO 7 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 7 TO 10 FEET
OCCASIONALLY TO 13 FEET.
TUESDAY
NORTH WINDS 20 TO 30 KNOTS. RAIN SHOWERS THROUGH EARLY
AFTERNOON. A CHANCE OF RAIN SHOWERS BY MID AFTERNOON. WAVES 7 TO
10 FEET OCCASIONALLY TO 13 FEET.
TUESDAY NIGHT
NORTH 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 15 TO 25 KNOTS BECOMING WEST 5 TO
15 KNOTS. WAVES SUBSIDING TO CALM TO 2 FEET.
THURSDAY
SOUTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTH. WAVES
CALM TO 2 FEET.
LSZ265-170800-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
1001 PM EDT SAT MAY 16 2026
REST OF TONIGHT
NORTH WINDS 10 TO 20 KNOTS. WAVES CALM TO
2 FEET.
SUNDAY
EAST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO 25 KNOTS
IN THE AFTERNOON. A CHANCE OF RAIN SHOWERS BY MID AFTERNOON.
WAVES BUILDING TO 1 TO 3 FEET.
SUNDAY NIGHT
EAST WINDS 15 TO 25 KNOTS BECOMING SOUTHEAST
20 TO 30 KNOTS AFTER MIDNIGHT, THEN DIMINISHING TO 15 TO 25 KNOTS
LATE. A CHANCE OF RAIN SHOWERS THROUGH MIDNIGHT. A CHANCE OF
THUNDERSTORMS. RAIN SHOWERS AFTER MIDNIGHT. WAVES BUILDING TO
3 TO 6 FEET OCCASIONALLY TO 8 FEET.
MONDAY
SOUTH WINDS 10 TO 20 KNOTS BECOMING NORTH 15 TO
25 KNOTS BY MID AFTERNOON. A CHANCE OF SHOWERS THROUGH EARLY
AFTERNOON. A CHANCE OF THUNDERSTORMS. SHOWERS LIKELY BY MID
AFTERNOON. WAVES SUBSIDING TO 1 TO 3 FEET.
MONDAY NIGHT
NORTH WINDS 15 TO 25 KNOTS BECOMING NORTHEAST
10 TO 20 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN SHOWERS THROUGH
MIDNIGHT. A SLIGHT CHANCE OF THUNDERSTORMS. RAIN SHOWERS AFTER
MIDNIGHT. WAVES BUILDING 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 LIKELY THROUGH EARLY
AFTERNOON. A CHANCE OF RAIN SHOWERS BY MID AFTERNOON. WAVES
BUILDING TO 7 TO 11 FEET OCCASIONALLY TO 14 FEET.
TUESDAY NIGHT
NORTHWEST GALES TO 35 KNOTS. WAVES SUBSIDING TO
6 TO 9 FEET OCCASIONALLY TO 11 FEET.
WEDNESDAY
NORTHWEST WINDS 20 TO 30 KNOTS BECOMING WEST 10 TO
20 KNOTS. WAVES SUBSIDING TO CALM TO 2 FEET.
THURSDAY
SOUTHEAST WINDS 10 TO 20 KNOTS VEERING SOUTH. WAVES
CALM TO 2 FEET.
LSZ266-170800-
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 SAT MAY 16 2026
REST OF TONIGHT
NORTH WINDS 10 TO 20 KNOTS. WAVES 2 TO 4 FEET
SUBSIDING TO 1 TO 3 FEET.
SUNDAY
NORTHEAST WINDS 10 TO 20 KNOTS VEERING EAST IN THE
AFTERNOON. A SLIGHT CHANCE OF RAIN SHOWERS BY MID AFTERNOON.
WAVES 1 TO 3 FEET.
SUNDAY NIGHT
EAST WINDS 15 TO 25 KNOTS BECOMING SOUTHEAST
20 TO 30 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN SHOWERS THROUGH
MIDNIGHT. A CHANCE OF THUNDERSTORMS. RAIN SHOWERS AFTER MIDNIGHT.
WAVES BUILDING TO 4 TO 7 FEET OCCASIONALLY TO 9 FEET.
MONDAY
SOUTH WINDS 15 TO 25 KNOTS BACKING NORTH BY MID
AFTERNOON. A CHANCE OF SHOWERS THROUGH EARLY AFTERNOON. A SLIGHT
CHANCE OF THUNDERSTORMS. SHOWERS BY MID AFTERNOON. WAVES
SUBSIDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
MONDAY NIGHT
NORTH WINDS 15 TO 25 KNOTS BECOMING NORTHEAST
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 4 TO 8 FEET OCCASIONALLY TO 10 FEET.
TUESDAY
EAST WINDS 20 TO 30 KNOTS BECOMING NORTHWEST GALES TO
35 KNOTS BY MID AFTERNOON. RAIN SHOWERS THROUGH EARLY AFTERNOON.
A 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. WAVES SUBSIDING TO
7 TO 10 FEET OCCASIONALLY TO 13 FEET.
WEDNESDAY
NORTHWEST WINDS 20 TO 30 KNOTS BECOMING WEST 10 TO
20 KNOTS. WAVES SUBSIDING TO CALM TO 2 FEET.
THURSDAY
SOUTHWEST WINDS 5 TO 15 KNOTS BECOMING SOUTH 10 TO
20 KNOTS. WAVES BUILDING TO 1 TO 3 FEET, THEN SUBSIDING TO CALM
TO 2 FEET.
LSZ267-170800-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
1001 PM EDT SAT MAY 16 2026
REST OF TONIGHT
NORTHWEST WINDS 10 TO 20 KNOTS VEERING NORTH
LATE. WAVES 1 TO 3 FEET.
SUNDAY
NORTHEAST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS LATE. A SLIGHT CHANCE OF RAIN SHOWERS BY MID AFTERNOON.
WAVES SUBSIDING TO CALM TO 2 FEET.
SUNDAY NIGHT
EAST WINDS 15 TO 25 KNOTS BECOMING SOUTHEAST
20 TO 30 KNOTS AFTER MIDNIGHT, THEN INCREASING TO 30 KNOTS WITH A
FEW GALE FORCE GUSTS TO 35 KNOTS POSSIBLE LATE. A CHANCE OF RAIN
SHOWERS THROUGH MIDNIGHT, THEN RAIN SHOWERS LIKELY AND A CHANCE
OF THUNDERSTORMS AFTER MIDNIGHT. WAVES BUILDING TO 4 TO 7 FEET
OCCASIONALLY TO 9 FEET.
MONDAY
SOUTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS BY MID AFTERNOON. SHOWERS AND A SLIGHT CHANCE OF
THUNDERSTORMS. WAVES SUBSIDING TO CALM TO 2 FEET.
MONDAY NIGHT
NORTH WINDS 10 TO 20 KNOTS VEERING EAST AFTER
MIDNIGHT. A CHANCE OF RAIN SHOWERS THROUGH MIDNIGHT. A SLIGHT
CHANCE OF THUNDERSTORMS. RAIN SHOWERS LIKELY AFTER MIDNIGHT.
WAVES BUILDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.
TUESDAY
SOUTHEAST WINDS 15 TO 25 KNOTS BECOMING WEST 20 TO
30 KNOTS BY MID AFTERNOON. RAIN SHOWERS LIKELY THROUGH EARLY
AFTERNOON, THEN A CHANCE OF RAIN SHOWERS BY MID AFTERNOON. WAVES
BUILDING TO 7 TO 10 FEET OCCASIONALLY TO 13 FEET.
TUESDAY NIGHT
NORTHWEST GALES TO 35 KNOTS. WAVES 7 TO 10 FEET
OCCASIONALLY TO 13 FEET.
WEDNESDAY
NORTHWEST WINDS 20 TO 30 KNOTS DIMINISHING TO 10 TO
20 KNOTS. WAVES SUBSIDING TO CALM TO 2 FEET.
THURSDAY
WEST WINDS 5 TO 15 KNOTS BACKING SOUTH. WAVES CALM TO
2 FEET.
LSZ261-170800-
MAFOR 1703/
SUPERIOR WEST 11810 11210 11220 11230 11140 12150 11246. A CHANCE
OF THUNDERSTORMS SUNDAY EVENING. WAVES 1 TO 2 FEET OVERNIGHT.
WAVES 1 TO 3 FEET BUILDING TO 6 TO 9 FEET SUNDAY. WAVES 7 TO 10
FEET SUNDAY EVENING.
SUPERIOR NORTH CENTRAL 11820 11810 11110 11120 13220 11230. A
CHANCE OF SHOWERS SUNDAY EVENING. WAVES 2 TO 4 FEET OVERNIGHT.
WAVES 1 TO 3 FEET SUNDAY AND SUNDAY EVENING.
SUPERIOR SOUTH CENTRAL 11820 11810 11110 11210 12220 12230. A
CHANCE OF SHOWERS SUNDAY EVENING. WAVES 1 TO 3 FEET.
SUPERIOR EAST 11720 11820 13120 11110 11120 11230. A CHANCE OF
SHOWERS SUNDAY EVENING. WAVES 1 TO 3 FEET.
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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