293
FZUS63 KMQT 301401
GLFLS
OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
1000 AM EDT MON MAR 30 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
THIS MORNING, LAKE SUPERIOR IS BETWEEN A 29.8 INCH LOW OVER QUEBEC,
A 29.7 INCH LOW OVER THE CENTRAL PLAINS, A BROAD 30.2 INCH HIGH OVER
THE CANADIAN PRAIRIE, AND A 30.5 INCH HIGH OFF THE EAST COAST.
TONIGHT, AS THE QUEBEC LOW AND EAST COAST HIGH SHIFT EAST, THE
CANADIAN HIGH SHIFTS OVER FAR NORTHERN ONTARIO. MEANWHILE, THE
PLAINS LOW EXTENDS A WEAKENING 29.7 INCH TROUGH OVER LAKE MICHIGAN
AND THE LOWER PENINSULA. THIS TROUGH LINGERS IN PLACE THROUGH
TUESDAY BEFORE CONSOLIDATING INTO A 29.8 INCH LOW OVER THE LOWER
GREAT LAKES TUESDAY NIGHT WHILE THE CANADIAN HIGH BUILDS TO 30.4
INCHES AND EXTENDS A 30.3 INCH RIDGE OVER NORTH DAKOTA. THE RIDGE
THEN BUILDS ALONG WITH THE PARENT HIGH TO 30.5 INCHES EXTENDING FROM
LAKE SUPERIOR TO JAMES BAY WEDNESDAY WHILE THE LOW DEPARTS TO THE
EAST. BY THURSDAY MORNING, THE HIGH BUILDS TO 30.8 INCHES WHILE A
29.5 INCH LOW DEVELOPS OVER THE CENTRAL PLAINS. THIS LOW PASSES JUST
SOUTH OF LAKE SUPERIOR AT 29.7 INCHES OVERNIGHT INTO FRIDAY MORNING
WHILE ANOTHER LOW OF 29.6 INCHES DEVELOPS OVER THE OKLAHOMA
PANHANDLE. THIS LOW APPROACHES THE BAY OF GREEN BAY SATURDAY
AFTERNOON, TRACKING OVER EASTERN LAKE SUPERIOR AT NEAR 29.4 INCHES
BY SUNDAY MORNING.
LSZ162-302000-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
1001 AM EDT MON MAR 30 2026 /901 AM CDT MON MAR 30 2026/
REST OF TODAY
NORTHEAST WINDS 10 TO 20 KNOTS INCREASING TO
20 TO 30 KNOTS. WAVES CALM TO 2 FEET BUILDING TO 3 TO 6 FEET
OCCASIONALLY TO 8 FEET.
TONIGHT
EAST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS LATE. A CHANCE OF RAIN AND SNOW SHOWERS, POSSIBLY MIXED
WITH FREEZING RAIN 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
NORTHEAST WINDS 15 TO 25 KNOTS BACKING NORTHWEST LATE.
A SLIGHT CHANCE OF FREEZING RAIN THROUGH EARLY AFTERNOON. A
CHANCE OF SNOW SHOWERS, POSSIBLY MIXED WITH RAIN. WAVES SUBSIDING
TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
TUESDAY NIGHT
NORTHWEST WINDS 10 TO 20 KNOTS VEERING NORTH
AFTER MIDNIGHT. A SLIGHT CHANCE OF SNOW SHOWERS THROUGH MIDNIGHT.
WAVES SUBSIDING TO 1 TO 3 FEET.
WEDNESDAY
NORTHEAST WINDS 10 TO 20 KNOTS VEERING EAST BY MID
AFTERNOON. WAVES BUILDING TO 2 TO 4 FEET.
WEDNESDAY NIGHT
EAST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO
30 KNOTS AFTER MIDNIGHT. WAVES BUILDING TO 5 TO 8 FEET
OCCASIONALLY TO 10 FEET.
THURSDAY
EAST GALES TO 45 KNOTS BECOMING NORTHEAST GALES TO
40 KNOTS. A CHANCE OF SNOW SHOWERS, THEN SNOW SHOWERS LIKELY.
WAVES BUILDING TO 12 TO 17 FEET OCCASIONALLY TO 21 FEET, THEN
SUBSIDING TO 10 TO 14 FEET OCCASIONALLY TO 18 FEET.
FRIDAY
NORTHEAST WINDS 20 TO 30 KNOTS BECOMING EAST GALES TO
35 KNOTS. A CHANCE OF SNOW SHOWERS. RAIN SHOWERS LIKELY. WAVES
SUBSIDING TO 6 TO 9 FEET OCCASIONALLY TO 11 FEET, THEN BUILDING
TO 9 TO 12 FEET OCCASIONALLY TO 15 FEET.
LSZ263-302000-
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 AM EDT MON MAR 30 2026
REST OF TODAY
NORTHEAST WINDS 5 TO 15 KNOTS INCREASING TO
15 TO 25 KNOTS. WAVES CALM TO 2 FEET BUILDING TO 3 TO 6 FEET
OCCASIONALLY TO 8 FEET.
TONIGHT
EAST WINDS 15 TO 25 KNOTS. A CHANCE OF SNOW AND RAIN
SHOWERS AFTER MIDNIGHT. WAVES 3 TO 6 FEET OCCASIONALLY TO 8 FEET.
TUESDAY
EAST WINDS 15 TO 25 KNOTS BACKING NORTHEAST IN THE
AFTERNOON, THEN BECOMING NORTH 10 TO 20 KNOTS LATE. A SLIGHT
CHANCE OF FREEZING RAIN THROUGH EARLY AFTERNOON. A CHANCE OF SNOW
SHOWERS, POSSIBLY MIXED WITH RAIN. WAVES BUILDING TO 4 TO 7 FEET
OCCASIONALLY TO 9 FEET, THEN SUBSIDING TO 3 TO 5 FEET
OCCASIONALLY TO 7 FEET.
TUESDAY NIGHT
NORTH WINDS 10 TO 20 KNOTS. A SLIGHT CHANCE OF
SNOW SHOWERS THROUGH MIDNIGHT. WAVES SUBSIDING TO 2 TO 4 FEET.
WEDNESDAY
NORTHEAST WINDS 10 TO 20 KNOTS VEERING EAST BY MID
AFTERNOON. WAVES SUBSIDING TO 1 TO 3 FEET, THEN BUILDING TO 2 TO
4 FEET.
WEDNESDAY NIGHT
EAST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS AFTER MIDNIGHT. WAVES BUILDING TO 3 TO 6 FEET
OCCASIONALLY TO 8 FEET.
THURSDAY
EAST GALES TO 40 KNOTS BACKING NORTHEAST. A CHANCE OF
SNOW SHOWERS, THEN SNOW SHOWERS LIKELY. WAVES BUILDING TO 11 TO
15 FEET OCCASIONALLY TO 19 FEET, THEN SUBSIDING TO 10 TO 14 FEET
OCCASIONALLY TO 18 FEET.
FRIDAY
NORTHEAST WINDS 20 TO 30 KNOTS BECOMING EAST GALES TO
35 KNOTS. A CHANCE OF SNOW SHOWERS. A CHANCE OF RAIN SHOWERS.
WAVES SUBSIDING TO 5 TO 8 FEET OCCASIONALLY TO 10 FEET, THEN
BUILDING TO 9 TO 12 FEET OCCASIONALLY TO 15 FEET.
LSZ264-302000-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
1001 AM EDT MON MAR 30 2026
REST OF TODAY
NORTH WINDS 5 TO 15 KNOTS VEERING NORTHEAST IN
THE AFTERNOON, THEN INCREASING TO 10 TO 20 KNOTS LATE. A SLIGHT
CHANCE OF SNOW SHOWERS BY MID AFTERNOON. WAVES CALM TO 2 FEET
BUILDING TO 1 TO 3 FEET.
TONIGHT
EAST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO 25 KNOTS
AFTER MIDNIGHT. A CHANCE OF SNOW SHOWERS AFTER MIDNIGHT. WAVES
BUILDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.
TUESDAY
EAST WINDS 15 TO 25 KNOTS BECOMING NORTHEAST 10 TO
20 KNOTS LATE. SNOW SHOWERS LIKELY, POSSIBLY MIXED WITH FREEZING
RAIN AND SLEET THROUGH EARLY AFTERNOON, THEN A CHANCE OF SNOW
SHOWERS 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
NORTH WINDS 10 TO 20 KNOTS. A SLIGHT CHANCE OF
SNOW SHOWERS THROUGH MIDNIGHT. WAVES SUBSIDING TO 2 TO 4 FEET,
THEN BUILDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
WEDNESDAY
NORTHEAST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
WEDNESDAY NIGHT
EAST WINDS 10 TO 20 KNOTS INCREASING TO 20 TO
30 KNOTS AFTER MIDNIGHT. WAVES BUILDING TO 3 TO 6 FEET
OCCASIONALLY TO 8 FEET.
THURSDAY
EAST GALES TO 40 KNOTS. FREEZING SPRAY. A CHANCE OF
SNOW SHOWERS, THEN SNOW SHOWERS LIKELY. WAVES BUILDING TO 10 TO
14 FEET OCCASIONALLY TO 18 FEET, THEN SUBSIDING TO 9 TO 12 FEET
OCCASIONALLY TO 15 FEET.
FRIDAY
NORTHEAST WINDS 20 TO 30 KNOTS BECOMING EAST GALES TO
35 KNOTS. A CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO 3 TO
6 FEET OCCASIONALLY TO 8 FEET, THEN BUILDING TO 8 TO 11 FEET
OCCASIONALLY TO 14 FEET.
LSZ265-302000-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
1001 AM EDT MON MAR 30 2026
REST OF TODAY
NORTH WINDS 10 TO 20 KNOTS VEERING NORTHEAST IN
THE AFTERNOON. WAVES CALM TO 2 FEET.
TONIGHT
EAST WINDS 10 TO 20 KNOTS INCREASING TO 20 TO
30 KNOTS. A CHANCE OF SNOW SHOWERS, RAIN SHOWERS AND FREEZING
RAIN AFTER MIDNIGHT. WAVES 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. FREEZING
RAIN, POSSIBLY MIXED WITH RAIN SHOWERS THROUGH EARLY AFTERNOON. A
CHANCE OF SNOW SHOWERS. A SLIGHT CHANCE OF FREEZING RAIN AND
SLEET 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
NORTHWEST WINDS 20 TO 30 KNOTS BECOMING NORTH
15 TO 25 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF SNOW SHOWERS.
FREEZING SPRAY AFTER MIDNIGHT. WAVES SUBSIDING TO 2 TO 4 FEET,
THEN BUILDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
WEDNESDAY
NORTH WINDS 15 TO 25 KNOTS BECOMING NORTHEAST 10 TO
20 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO 1 TO 3 FEET.
WEDNESDAY NIGHT
EAST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO
30 KNOTS AFTER MIDNIGHT. FREEZING SPRAY AFTER MIDNIGHT. WAVES
BUILDING TO 5 TO 8 FEET OCCASIONALLY TO 10 FEET.
THURSDAY
EAST GALES TO 40 KNOTS. FREEZING SPRAY. A CHANCE OF
SNOW SHOWERS, THEN SNOW SHOWERS, POSSIBLY MIXED WITH RAIN AND
FREEZING RAIN LIKELY. WAVES BUILDING TO 11 TO 15 FEET
OCCASIONALLY TO 19 FEET, THEN SUBSIDING TO 9 TO 12 FEET
OCCASIONALLY TO 15 FEET.
FRIDAY
NORTHEAST WINDS 20 TO 30 KNOTS BECOMING EAST GALES TO
35 KNOTS. A CHANCE OF RAIN AND SNOW SHOWERS. WAVES SUBSIDING TO
3 TO 6 FEET OCCASIONALLY TO 8 FEET, THEN BUILDING TO 9 TO 12 FEET
OCCASIONALLY TO 15 FEET.
LSZ266-302000-
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 AM EDT MON MAR 30 2026
REST OF TODAY
NORTH WINDS 10 TO 20 KNOTS VEERING NORTHEAST
LATE. WAVES CALM TO 2 FEET.
TONIGHT
NORTHEAST WINDS 15 TO 25 KNOTS VEERING EAST AFTER
MIDNIGHT. A SLIGHT CHANCE OF RAIN SHOWERS. A SLIGHT CHANCE OF
FREEZING RAIN AND SNOW SHOWERS AFTER MIDNIGHT. WAVES 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 INCREASING TO 20 TO 30 KNOTS
LATE. SNOW SHOWERS, POSSIBLY MIXED WITH FREEZING RAIN THROUGH
EARLY AFTERNOON. RAIN SHOWERS LIKELY, POSSIBLY MIXED WITH SLEET.
A CHANCE OF SNOW SHOWERS 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
NORTH WINDS 20 TO 30 KNOTS. A SLIGHT CHANCE OF
SNOW SHOWERS. FREEZING SPRAY AFTER MIDNIGHT. WAVES SUBSIDING TO
2 TO 4 FEET, THEN BUILDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
WEDNESDAY
NORTH WINDS 15 TO 25 KNOTS BECOMING NORTHEAST 10 TO
20 KNOTS BY MID AFTERNOON. FREEZING SPRAY THROUGH EARLY
AFTERNOON. WAVES SUBSIDING TO 1 TO 3 FEET.
WEDNESDAY NIGHT
EAST WINDS 10 TO 20 KNOTS INCREASING TO 20 TO
30 KNOTS AFTER MIDNIGHT. WAVES BUILDING TO 5 TO 8 FEET
OCCASIONALLY TO 10 FEET.
THURSDAY
EAST GALES TO 40 KNOTS. FREEZING SPRAY. A CHANCE OF
SNOW SHOWERS, THEN SNOW SHOWERS, POSSIBLY MIXED WITH RAIN AND
FREEZING RAIN LIKELY. WAVES BUILDING TO 10 TO 14 FEET
OCCASIONALLY TO 18 FEET, THEN SUBSIDING TO 9 TO 12 FEET
OCCASIONALLY TO 15 FEET.
FRIDAY
NORTHEAST GALES TO 35 KNOTS VEERING EAST. A CHANCE OF
RAIN AND SNOW SHOWERS. WAVES SUBSIDING TO 3 TO 6 FEET
OCCASIONALLY TO 8 FEET, THEN BUILDING TO 8 TO 11 FEET
OCCASIONALLY TO 14 FEET.
LSZ267-302000-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
1001 AM EDT MON MAR 30 2026
REST OF TODAY
NORTH WINDS 10 TO 20 KNOTS VEERING NORTHEAST
LATE. WAVES CALM TO 2 FEET.
TONIGHT
NORTHEAST WINDS 10 TO 20 KNOTS BECOMING EAST 15 TO
25 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF RAIN AND SNOW
SHOWERS. A SLIGHT CHANCE OF FREEZING RAIN AFTER MIDNIGHT. WAVES
BUILDING TO 2 TO 4 FEET.
TUESDAY
EAST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS IN THE AFTERNOON, THEN BACKING NORTHEAST LATE. RAIN
SHOWERS, POSSIBLY MIXED WITH SNOW. SLEET LIKELY BY MID AFTERNOON.
WAVES BUILDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET, THEN
SUBSIDING TO 2 TO 4 FEET.
TUESDAY NIGHT
NORTH WINDS 15 TO 25 KNOTS INCREASING TO 20 TO
30 KNOTS AFTER MIDNIGHT. A CHANCE OF SNOW SHOWERS. FREEZING SPRAY
AFTER MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET, THEN BUILDING TO
2 TO 4 FEET.
WEDNESDAY
NORTH WINDS 10 TO 20 KNOTS. WAVES SUBSIDING TO CALM
TO 2 FEET.
WEDNESDAY NIGHT
EAST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS AFTER MIDNIGHT. WAVES BUILDING TO 3 TO 6 FEET
OCCASIONALLY TO 8 FEET.
THURSDAY
EAST GALES TO 40 KNOTS. SNOW SHOWERS LIKELY. RAIN
SHOWERS LIKELY. WAVES BUILDING TO 6 TO 10 FEET OCCASIONALLY TO
13 FEET.
FRIDAY
NORTHEAST WINDS 20 TO 30 KNOTS BECOMING EAST GALES TO
35 KNOTS. A CHANCE OF RAIN AND SNOW SHOWERS. WAVES SUBSIDING TO
2 TO 4 FEET, THEN BUILDING TO 5 TO 8 FEET OCCASIONALLY TO
10 FEET.
LSZ261-302000-
MAFOR 3015/
SUPERIOR WEST 11120 12130 13240 11230 11130. A CHANCE OF SNOW AND
RAIN SHOWERS TUESDAY MORNING. WAVES 1 TO 3 FEET BUILDING TO 3 TO
5 FEET THIS AFTERNOON. WAVES 4 TO 7 FEET TONIGHT AND TUESDAY
MORNING.
SUPERIOR NORTH CENTRAL 12110 12120 13230 11237. WAVES 2 FEET OR
LESS THIS AFTERNOON. WAVES 1 TO 3 FEET BUILDING TO 3 TO 5 FEET
TONIGHT. WAVES 3 TO 6 FEET BUILDING TO 4 TO 7 FEET TUESDAY
MORNING.
SUPERIOR SOUTH CENTRAL 11810 11110 11120 11220 13230 11237. WAVES
1 TO 2 FEET THIS AFTERNOON. WAVES 1 TO 3 FEET BUILDING TO 3 TO 5
FEET TONIGHT. WAVES 4 TO 7 FEET TUESDAY MORNING.
SUPERIOR EAST 11810 12110 11120 13230 11237. WAVES 1 TO 2 FEET
THIS AFTERNOON. WAVES 1 TO 3 FEET BUILDING TO 3 TO 5 FEET
TONIGHT. WAVES 3 TO 6 FEET TUESDAY MORNING.
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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