097
FZUS63 KMQT 300801
GLFLS
OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
400 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
AS WEAK RIDGING OF 30.0 INCHES RETURNS TO THE LAKE TODAY, ANOTHER
LOW PRESSURE DEEPENS TO 29.4 INCHES IN THE LEE OF THE ROCKIES BEFORE
PUSHING INTO THE PLAINS THIS EVENING. THIS LOW WEAKENS TO 29.6
INCHES AS IT MOVES THROUGH THE GREAT LAKES ON TUESDAY. THE LOW THEN
TRACKS ALONG THE ST. LAWRENCE SEAWAY TUESDAY NIGHT AND A 30.3 INCH
HIGH PRESSURE BUILDS OVER THE NORTHERN PLAINS. THIS HIGH GRADUALLY
BUILDS OVER NORTHERN ONTARIO NEAR JAMES BAY TO 30.5 INCHES BY
WEDNESDAY. BY THURSDAY, THE HIGH BUILDS TO 30.8 INCHES OVER NORTHERN
QUEBEC WHILE A 29.8 INCH LOW PASSES OVER LOWER MICHIGAN AND A 29.3
INCH LOW PRESSURE ORGANIZES IN THE LEE OF THE ROCKIES THURSDAY
NIGHT. THE LOW OVER THE ROCKIES WEAKENS TO 29.6 INCHES BY FRIDAY
BEFORE LIFTING TOWARDS THE GREAT LAKES BASIN AT AROUND 29.7 INCHES
ON SATURDAY.
LSZ162-302000-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
400 AM EDT MON MAR 30 2026 /300 AM CDT MON MAR 30 2026/
EARLY THIS MORNING
NORTHEAST WINDS 5 TO 15 KNOTS. WAVES CALM
TO 2 FEET.
TODAY
NORTHEAST WINDS 5 TO 15 KNOTS INCREASING TO 20 TO
30 KNOTS. WAVES 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 10 TO 14 FEET OCCASIONALLY TO 18 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-
400 AM EDT MON MAR 30 2026
EARLY THIS MORNING
NORTH WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
TODAY
NORTHEAST WINDS 5 TO 15 KNOTS INCREASING TO 15 TO
25 KNOTS. WAVES 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-
400 AM EDT MON MAR 30 2026
EARLY THIS MORNING
NORTH WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
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 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-
400 AM EDT MON MAR 30 2026
EARLY THIS MORNING
NORTHWEST WINDS 10 TO 20 KNOTS. WAVES CALM
TO 2 FEET.
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-
400 AM EDT MON MAR 30 2026
EARLY THIS MORNING
NORTHWEST WINDS 10 TO 20 KNOTS. WAVES CALM
TO 2 FEET.
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-
400 AM EDT MON MAR 30 2026
EARLY THIS MORNING
NORTHWEST WINDS 10 TO 20 KNOTS. WAVES CALM
TO 2 FEET.
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 1 TO 3 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 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 9 FEET OCCASIONALLY TO
11 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.
LSZ261-301400-
MAFOR 3009/
SUPERIOR WEST 11100 11110 11120 12130 13240. WAVES 1 TO 3 FEET
BUILDING TO 3 TO 5 FEET TODAY. WAVES 4 TO 7 FEET TONIGHT.
SUPERIOR NORTH CENTRAL 12810 12110 12120 12230. WAVES 2 FEET OR
LESS TODAY. WAVES 1 TO 3 FEET BUILDING TO 3 TO 5 FEET TONIGHT.
SUPERIOR SOUTH CENTRAL 11710 12810 11110 11120 11220 12230. WAVES
1 TO 2 FEET TODAY. WAVES 2 TO 4 FEET BUILDING TO 3 TO 5 FEET
TONIGHT.
SUPERIOR EAST 11710 12810 12110 11120 12230. WAVES 1 TO 2 FEET
TODAY. WAVES 1 TO 3 FEET BUILDING TO 2 TO 4 FEET TONIGHT.
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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