631
FZUS63 KMQT 162002
GLFLS
OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
401 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
A 29.7 INCH TROUGH WILL SHIFT EAST OF LAKE SUPERIOR THIS EVENING AS
AN ASSOCIATED 29.1 INCH LOW MOVES FROM HUDSON BAY TO NORTHERN
QUEBEC. IN ITS WAKE, RIDGING OF 30.1 INCHES WILL BUILD OVER THE LAKE
FROM NORTHERN ONTARIO TONIGHT INTO SUNDAY. THIS IS FOLLOWED BY
ANOTHER 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 THE LAKE ON TUESDAY. RIDGING OF 30.2 TO 30.3
INCHES BUILDS BACK OVER THE LAKE WEDNESDAY INTO THURSDAY.
LSZ162-170800-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
401 PM EDT SAT MAY 16 2026 /301 PM CDT SAT MAY 16 2026/
LATE THIS AFTERNOON
NORTHWEST WINDS 10 TO 20 KNOTS. WAVES 1 TO
3 FEET.
TONIGHT
NORTH WINDS 5 TO 15 KNOTS BECOMING NORTHEAST 10 TO
20 KNOTS AFTER MIDNIGHT, THEN BECOMING EAST 15 TO 25 KNOTS LATE.
WAVES SUBSIDING TO CALM TO 2 FEET, THEN 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 5 FEET
OCCASIONALLY TO 7 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. 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 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-
401 PM EDT SAT MAY 16 2026
LATE THIS AFTERNOON
NORTHWEST WINDS 10 TO 20 KNOTS. WAVES 1 TO
3 FEET.
TONIGHT
NORTH WINDS 5 TO 15 KNOTS VEERING NORTHEAST AFTER
MIDNIGHT. WAVES 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.
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 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 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-
401 PM EDT SAT MAY 16 2026
LATE THIS AFTERNOON
NORTHWEST WINDS 5 TO 15 KNOTS. WAVES 1 TO
3 FEET.
TONIGHT
NORTH WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS AFTER MIDNIGHT, THEN VEERING NORTHEAST LATE. WAVES
BUILDING TO 2 TO 4 FEET, THEN 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 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
BUILDING TO 8 TO 11 FEET OCCASIONALLY TO 14 FEET, THEN SUBSIDING
TO 6 TO 9 FEET OCCASIONALLY TO 11 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-
401 PM EDT SAT MAY 16 2026
LATE THIS AFTERNOON
NORTHWEST WINDS 15 TO 25 KNOTS. WAVES 1 TO
3 FEET.
TONIGHT
NORTH WINDS 10 TO 20 KNOTS. WAVES SUBSIDING TO 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. RAIN SHOWERS AFTER MIDNIGHT. WAVES BUILDING TO 4 TO
7 FEET OCCASIONALLY TO 9 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 10 FEET OCCASIONALLY TO 13 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-
401 PM EDT SAT MAY 16 2026
LATE THIS AFTERNOON
NORTHWEST WINDS 15 TO 25 KNOTS. WAVES 2 TO
4 FEET SUBSIDING TO 1 TO 3 FEET.
TONIGHT
NORTH WINDS 10 TO 20 KNOTS. WAVES BUILDING TO 2 TO
4 FEET, THEN 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. RAIN SHOWERS AFTER MIDNIGHT. WAVES BUILDING TO 5 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-
401 PM EDT SAT MAY 16 2026
LATE THIS AFTERNOON
NORTHWEST WINDS 15 TO 25 KNOTS. WAVES 1 TO
3 FEET.
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. 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.
LSZ261-170200-
MAFOR 1621/
SUPERIOR WEST 11720 11710 11810 11210 11220 11230 11140 11150.
WAVES 1 TO 3 FEET TONIGHT. WAVES 1 TO 3 FEET BUILDING TO 5 TO 8
FEET SUNDAY.
SUPERIOR NORTH CENTRAL 11720 12820 11810 11110 11120 12220. WAVES
2 TO 4 FEET TONIGHT. WAVES 1 TO 2 FEET SUNDAY.
SUPERIOR SOUTH CENTRAL 11720 12820 11810 11110 11210 12220. WAVES
1 TO 3 FEET.
SUPERIOR EAST 13720 11820 13120 11110. 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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