379
FZUS63 KMQT 200854
GLFLS
OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
354 AM EST FRI DEC 20 2024
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, A 30.0 INCH LOW IS OVER THE CHICAGO AREA
WITH A 30.4 INCH HIGH OVER QUEBEC AND A 30.7 INCH HIGH OVER THE
NORTHERN PLAINS. WITH THE LOW DEPARTING TO THE SOUTHEAST, HIGH
PRESSURE WEAKENS TO 30.6 INCHES OVER THE MINNESOTA/ONTARIO BORDER
THIS AFTERNOON. THIS HIGH PRESSURE WILL SLOWLY MEANDER EAST
THROUGH THE WEEKEND, TRACKING OVER NORTHERN ONTARIO SATURDAY AND
TO THE LOWER GREAT LAKES BY SUNDAY EVENING. MONDAY, THE HIGH WILL
BUILD TO 30.7 INCHES OVER THE NORTHEAST US WHILE A WEAK 30.0 INCH
LOW PRESSURE APPROACHES LAKE MICHIGAN. THIS FEATURE SLIDES INTO
THE LOWER GREAT LAKES BY TUESDAY MORNING, FOLLOWED BY WEAK RIDGING
THE REST OF THE DAY.
LSZ162-201700-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
354 AM EST FRI DEC 20 2024 /254 AM CST FRI DEC 20 2024/
EARLY THIS MORNING
NORTH WINDS 15 TO 25 KNOTS. ISOLATED SNOW
SHOWERS. WAVES 3 TO 6 FEET OCCASIONALLY TO 8 FEET.
TODAY
NORTH WINDS 10 TO 20 KNOTS BACKING NORTHWEST BY MID
AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET, THEN BUILDING TO
1 TO 3 FEET.
TONIGHT
NORTH WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS BY MIDNIGHT, THEN VEERING NORTHEAST LATE. WAVES
SUBSIDING TO CALM TO 2 FEET.
SATURDAY
NORTHEAST WINDS 5 TO 15 KNOTS VEERING EAST BY LATE
MORNING, THEN VEERING SOUTH BY MID AFTERNOON. A SLIGHT CHANCE OF
SNOW SHOWERS. WAVES CALM TO 2 FEET.
SATURDAY NIGHT
SOUTH WINDS 5 TO 15 KNOTS INCREASING TO 15 TO
25 KNOTS AFTER MIDNIGHT. WAVES BUILDING TO 1 TO 3 FEET.
SUNDAY
SOUTH WINDS 15 TO 25 KNOTS. WAVES BUILDING TO 2 TO
4 FEET.
SUNDAY NIGHT
SOUTH WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
MONDAY
NORTH WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
TUESDAY
SOUTH WINDS 5 TO 15 KNOTS BECOMING SOUTHWEST 10 TO
20 KNOTS. WAVES CALM TO 2 FEET.
LSZ263-201700-
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-
354 AM EST FRI DEC 20 2024
EARLY THIS MORNING
NORTH WINDS 15 TO 25 KNOTS. SCATTERED SNOW
SHOWERS. WAVES 3 TO 6 FEET OCCASIONALLY TO 8 FEET.
TODAY
NORTH WINDS 15 TO 25 KNOTS. WAVES SUBSIDING TO 2 TO
4 FEET.
TONIGHT
NORTH WINDS 15 TO 25 KNOTS DIMINISHING TO 5 TO
15 KNOTS. A SLIGHT CHANCE OF SNOW SHOWERS AFTER MIDNIGHT. WAVES
SUBSIDING TO 1 TO 3 FEET.
SATURDAY
NORTH WINDS 5 TO 15 KNOTS VEERING EAST BY LATE
MORNING, THEN VEERING SOUTH BY MID AFTERNOON. A SLIGHT CHANCE OF
SNOW SHOWERS. WAVES SUBSIDING TO CALM TO 2 FEET.
SATURDAY NIGHT
SOUTH WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS AFTER MIDNIGHT. WAVES BUILDING TO 1 TO 3 FEET.
SUNDAY
SOUTH WINDS 10 TO 20 KNOTS INCREASING TO 15 TO 25 KNOTS
IN THE AFTERNOON. WAVES BUILDING TO 2 TO 4 FEET.
SUNDAY NIGHT
SOUTH WINDS 10 TO 20 KNOTS. WAVES SUBSIDING TO
CALM TO 2 FEET.
MONDAY
NORTH WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
TUESDAY
SOUTHWEST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
LSZ264-201700-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
354 AM EST FRI DEC 20 2024
EARLY THIS MORNING
NORTH WINDS 15 TO 25 KNOTS. ISOLATED SNOW
SHOWERS. WAVES 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
TODAY
NORTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO 20 KNOTS
BY LATE MORNING, THEN INCREASING TO 15 TO 25 KNOTS BY MID
AFTERNOON. FREEZING SPRAY. ISOLATED SNOW SHOWERS. WAVES BUILDING
TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.
TONIGHT
NORTH WINDS 15 TO 25 KNOTS DIMINISHING TO 5 TO
15 KNOTS. FREEZING SPRAY IN THE EVENING. A CHANCE OF SNOW
SHOWERS. WAVES SUBSIDING TO 2 TO 4 FEET.
SATURDAY
NORTH WINDS 5 TO 15 KNOTS BECOMING NORTHEAST LESS
THAN 10 KNOTS BY LATE MORNING, THEN VEERING SOUTH BY MID
AFTERNOON. A SLIGHT CHANCE OF SNOW SHOWERS IN THE MORNING. WAVES
SUBSIDING TO CALM TO 2 FEET.
SATURDAY NIGHT
SOUTH WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS AFTER MIDNIGHT. WAVES BUILDING TO 1 TO 3 FEET.
SUNDAY
SOUTH WINDS 10 TO 20 KNOTS. WAVES BUILDING TO 2 TO
4 FEET.
SUNDAY NIGHT
SOUTH WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET.
MONDAY
NORTH WINDS 5 TO 15 KNOTS. WAVES SUBSIDING TO CALM TO
2 FEET.
TUESDAY
SOUTHWEST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
LSZ265-201700-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
354 AM EST FRI DEC 20 2024
EARLY THIS MORNING
NORTH WINDS 15 TO 25 KNOTS. SCATTERED SNOW
SHOWERS. WAVES 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
TODAY
NORTH WINDS 20 TO 30 KNOTS BACKING NORTHWEST BY MID
AFTERNOON. ISOLATED SNOW SHOWERS. FREEZING SPRAY IN THE
AFTERNOON. WAVES BUILDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.
TONIGHT
NORTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS LATE. FREEZING SPRAY IN THE EVENING. A CHANCE OF SNOW
SHOWERS. WAVES SUBSIDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
SATURDAY
NORTH WINDS 10 TO 20 KNOTS BECOMING NORTHWEST 5 TO
15 KNOTS BY MID AFTERNOON. A SLIGHT CHANCE OF SNOW SHOWERS. WAVES
SUBSIDING TO CALM TO 2 FEET.
SATURDAY NIGHT
SOUTH WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
SUNDAY
SOUTH WINDS 10 TO 20 KNOTS. WAVES CALM TO 2 FEET.
SUNDAY NIGHT
SOUTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
MONDAY
SOUTH WINDS 10 TO 20 KNOTS BECOMING NORTH 5 TO
15 KNOTS. A CHANCE OF SNOW SHOWERS. WAVES CALM TO 2 FEET.
TUESDAY
NORTH WINDS 5 TO 15 KNOTS VEERING SOUTH. WAVES CALM TO
2 FEET.
LSZ266-201700-
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-
354 AM EST FRI DEC 20 2024
EARLY THIS MORNING
NORTH WINDS 15 TO 25 KNOTS. NUMEROUS SNOW
SHOWERS. WAVES 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
TODAY
NORTH WINDS 15 TO 25 KNOTS INCREASING TO 20 TO 30 KNOTS.
SCATTERED SNOW SHOWERS. FREEZING SPRAY IN THE AFTERNOON. WAVES
BUILDING TO 4 TO 7 FEET OCCASIONALLY TO 9 FEET.
TONIGHT
NORTH WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS LATE. FREEZING SPRAY. A CHANCE OF SNOW SHOWERS. WAVES
SUBSIDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
SATURDAY
NORTH WINDS 10 TO 20 KNOTS BECOMING NORTHEAST 5 TO
15 KNOTS BY LATE MORNING, THEN BACKING NORTH BY MID AFTERNOON. A
SLIGHT CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO CALM TO 2 FEET.
SATURDAY NIGHT
SOUTH WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
SUNDAY
SOUTH WINDS 15 TO 25 KNOTS. WAVES BUILDING TO 3 TO
5 FEET OCCASIONALLY TO 7 FEET.
SUNDAY NIGHT
SOUTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS AFTER MIDNIGHT. A CHANCE OF SNOW SHOWERS. WAVES
SUBSIDING TO 2 TO 4 FEET.
MONDAY
SOUTH WINDS 10 TO 20 KNOTS BECOMING NORTH 5 TO
15 KNOTS. A CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO CALM TO
2 FEET.
TUESDAY
SOUTH WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
LSZ267-201700-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
354 AM EST FRI DEC 20 2024
EARLY THIS MORNING
EAST WINDS 5 TO 15 KNOTS. NUMEROUS SNOW
SHOWERS. WAVES CALM TO 2 FEET.
TODAY
NORTH WINDS 10 TO 20 KNOTS INCREASING TO 20 TO 30 KNOTS.
SCATTERED SNOW SHOWERS. WAVES BUILDING TO 3 TO 6 FEET
OCCASIONALLY TO 8 FEET.
TONIGHT
NORTH WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS BY MIDNIGHT. FREEZING SPRAY. A CHANCE OF SNOW SHOWERS.
WAVES BUILDING TO 4 TO 7 FEET OCCASIONALLY TO 9 FEET, THEN
SUBSIDING TO 2 TO 4 FEET.
SATURDAY
NORTH WINDS 10 TO 20 KNOTS VEERING NORTHEAST BY LATE
MORNING, THEN BECOMING NORTH 5 TO 15 KNOTS BY MID AFTERNOON. A
SLIGHT CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO CALM TO 2 FEET.
SATURDAY NIGHT
SOUTHEAST WINDS 5 TO 15 KNOTS VEERING SOUTH
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
SUNDAY
SOUTH WINDS 15 TO 25 KNOTS. WAVES BUILDING TO 2 TO
4 FEET.
SUNDAY NIGHT
SOUTH WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS AFTER MIDNIGHT. A CHANCE OF SNOW SHOWERS. WAVES BUILDING
TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET, THEN SUBSIDING TO 2 TO
4 FEET.
MONDAY
SOUTH WINDS 10 TO 20 KNOTS BACKING NORTHEAST. SNOW
SHOWERS LIKELY, THEN A CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO
CALM TO 2 FEET.
TUESDAY
EAST WINDS 5 TO 15 KNOTS VEERING SOUTH. WAVES CALM TO
2 FEET.
LSZ261-201700-
MAFOR 2010/
SUPERIOR WEST 12830 11820 11720 13820 11110. WAVES 3 TO 6 FEET
SUBSIDING TO 1 TO 3 FEET TODAY. WAVES 1 TO 3 FEET TONIGHT.
SUPERIOR NORTH CENTRAL 15830 12820. A CHANCE OF SNOW SHOWERS THIS
EVENING. WAVES 3 TO 6 FEET TODAY SUBSIDING TO 2 TO 4 FEET
TONIGHT.
SUPERIOR SOUTH CENTRAL 11837 11830 19837 11830 12730 12830 11820.
WAVES 3 TO 6 FEET TODAY. WAVES 4 TO 7 FEET TONIGHT.
SUPERIOR EAST 11137 11837 13830 19837 12830 11820. WAVES 1 TO 3
FEET BUILDING TO 3 TO 5 FEET TODAY. WAVES 4 TO 7 FEET SUBSIDING
TO 3 TO 6 FEET TONIGHT.
GS
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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