Great Lakes Forecast
Issued by NWS

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FZUS63 KMQT 212001
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
401 PM EDT TUE MAR 21 2017

FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE SUPERIOR

.SYNOPSIS...A 29.9 INCH LOW WILL TRACK EASTWARD ACROSS SOUTHERN
QUEBEC THROUGH TONIGHT AS A 30.6 INCH HIGH PRESSURE BUILDS FROM
SOUTHERN MANITOBA TO LAKE SUPERIOR. THIS HIGH WILL THEN DRIFT TO
THE EAST COAST THROUGH THURSDAY AS A 29.5 INCH LOW PRESSURE
ORGANIZES OVER THE WESTERN PLAINS. BY FRIDAY AFTERNOON...THIS LOW
WILL MOVE INTO THE CENTRAL PLAINS AS 30.5 INCH HIGH PRESSURE
BUILDS ACROSS NORTHERN ONTARIO. THE HIGH WILL BUILD TO 30.7 INCHES
OVER JAMES BAY SATURDAY AFTERNOON AS THE LOW WEAKENS TO 29.7
INCHES OVER ILLINOIS. HIGH PRESSURE WILL LIFT EAST OF HUDSON
BAY ON SUNDAY...WHILE THE 29.7 INCH LOW OVER ILLINOIS FURTHER
WEAKENS.

LSZ162-220415-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
401 PM EDT TUE MAR 21 2017 /301 PM CDT TUE MAR 21 2017/

.LATE THIS AFTERNOON...NORTHWEST WINDS 15 TO 25 KNOTS. WAVES 2 TO
4 FEET.
.TONIGHT...NORTH WINDS 15 TO 25 KNOTS BECOMING NORTHEAST 10 TO
20 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.WEDNESDAY...SOUTHEAST WINDS 5 TO 15 KNOTS BACKING EAST BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
.WEDNESDAY NIGHT...SOUTHEAST WINDS 5 TO 15 KNOTS BECOMING SOUTH
10 TO 20 KNOTS AFTER MIDNIGHT. A CHANCE OF SNOW AFTER MIDNIGHT.
WAVES BUILDING TO 1 TO 3 FEET.
.THURSDAY...SOUTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS BY MID AFTERNOON. A SLIGHT CHANCE OF SNOW THROUGH EARLY
AFTERNOON. A CHANCE OF RAIN. WAVES BUILDING TO 2 TO 4 FEET...THEN
SUBSIDING TO 1 TO 3 FEET.
.THURSDAY NIGHT...SOUTHWEST WINDS 10 TO 20 KNOTS DIMINISHING TO
5 TO 15 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN. A CHANCE OF
FREEZING RAIN AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.FRIDAY...WEST WINDS 5 TO 15 KNOTS BECOMING NORTHEAST 10 TO
20 KNOTS BY MID AFTERNOON. WAVES CALM TO 2 FEET.
.FRIDAY NIGHT...NORTHEAST WINDS 10 TO 20 KNOTS BECOMING EAST
20 TO 30 KNOTS AFTER MIDNIGHT. WAVES BUILDING TO 3 TO 6 FEET.
.SATURDAY...EAST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS. A CHANCE OF SNOW...POSSIBLY MIXED WITH RAIN OR FREEZING
RAIN. WAVES BUILDING TO 4 TO 7 FEET...THEN SUBSIDING TO 2 TO 4
FEET.
.SUNDAY...EAST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO 15 KNOTS.
WAVES SUBSIDING TO CALM TO 2 FEET.

$$

LSZ263-220415-
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 TUE MAR 21 2017

.LATE THIS AFTERNOON...NORTHWEST WINDS 20 TO 30 KNOTS. WAVES 3 TO
5 FEET.
.TONIGHT...NORTH WINDS 20 TO 30 KNOTS DIMINISHING TO 10 TO 20
KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET.
.WEDNESDAY...EAST WINDS 5 TO 15 KNOTS VEERING SOUTH BY MID
AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.WEDNESDAY NIGHT...SOUTHEAST WINDS 5 TO 15 KNOTS BECOMING SOUTH
15 TO 25 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF SNOW AFTER
MIDNIGHT. WAVES BUILDING TO 1 TO 3 FEET.
.THURSDAY...SOUTH WINDS 15 TO 25 KNOTS. A CHANCE OF RAIN...
POSSIBLY MIXED WITH SNOW. WAVES BUILDING TO 2 TO 4 FEET...THEN
SUBSIDING TO 1 TO 3 FEET.
.THURSDAY NIGHT...SOUTHWEST WINDS 10 TO 20 KNOTS. A CHANCE OF
SNOW THROUGH MIDNIGHT. A CHANCE OF RAIN. WAVES SUBSIDING TO CALM
TO 2 FEET.
.FRIDAY...WEST WINDS 5 TO 15 KNOTS VEERING NORTH BY MID
AFTERNOON. WAVES BUILDING TO 1 TO 3 FEET.
.FRIDAY NIGHT...NORTHEAST WINDS 5 TO 15 KNOTS INCREASING TO 15 TO
25 KNOTS AFTER MIDNIGHT. WAVES BUILDING TO 3 TO 6 FEET.
.SATURDAY...EAST WINDS 15 TO 25 KNOTS. A CHANCE OF RAIN AND
SNOW...POSSIBLY MIXED WITH FREEZING RAIN. WAVES 3 TO 5 FEET.
.SUNDAY...EAST WINDS 10 TO 20 KNOTS. A CHANCE OF RAIN OR FREEZING
RAIN...POSSIBLY MIXED WITH SNOW. WAVES SUBSIDING TO CALM TO 2
FEET.

$$

LSZ264-220415-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
401 PM EDT TUE MAR 21 2017

.LATE THIS AFTERNOON...NORTHWEST WINDS 20 TO 30 KNOTS. FREEZING
SPRAY. WAVES 4 TO 7 FEET.
.TONIGHT...NORTH WINDS 20 TO 30 KNOTS DIMINISHING TO 10 TO 20
KNOTS AFTER MIDNIGHT. FREEZING SPRAY THROUGH MIDNIGHT. WAVES
SUBSIDING TO 2 TO 4 FEET.
.WEDNESDAY...NORTH WINDS 5 TO 15 KNOTS BACKING SOUTHWEST BY MID
AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.WEDNESDAY NIGHT...SOUTH WINDS 5 TO 15 KNOTS INCREASING TO 15 TO
25 KNOTS AFTER MIDNIGHT. WAVES BUILDING TO 2 TO 4 FEET.
.THURSDAY...SOUTH WINDS 20 TO 30 KNOTS. A CHANCE OF RAIN...
POSSIBLY MIXED WITH SNOW. WAVES BUILDING TO 3 TO 5 FEET.
.THURSDAY NIGHT...SOUTH WINDS 15 TO 25 KNOTS BECOMING SOUTHWEST
10 TO 15 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN...POSSIBLY MIXED
WITH SNOW. WAVES SUBSIDING TO 1 TO 3 FEET.
.FRIDAY...WEST WINDS 5 TO 15 KNOTS BECOMING NORTH 10 TO 20 KNOTS
BY MID AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET...THEN
BUILDING TO 1 TO 3 FEET.
.FRIDAY NIGHT...NORTHEAST WINDS 15 TO 25 KNOTS. WAVES BUILDING TO
3 TO 6 FEET.
.SATURDAY...EAST WINDS 15 TO 25 KNOTS. A CHANCE OF FREEZING RAIN
AND SNOW. WAVES SUBSIDING TO 3 TO 6 FEET.
.SUNDAY...EAST WINDS 15 TO 25 KNOTS VEERING SOUTHEAST. A CHANCE
OF FREEZING RAIN. A CHANCE OF SNOW...POSSIBLY MIXED WITH RAIN.
WAVES SUBSIDING TO CALM TO 2 FEET.

$$

LSZ265-220415-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
401 PM EDT TUE MAR 21 2017

.LATE THIS AFTERNOON...NORTHWEST WINDS 20 TO 30 KNOTS WITH A FEW
GALE FORCE GUSTS TO 35 KNOTS. FREEZING SPRAY. ISOLATED SNOW
SHOWERS. WAVES 4 TO 8 FEET.
.TONIGHT...NORTH WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS AFTER MIDNIGHT. FREEZING SPRAY. ISOLATED SNOW SHOWERS.
WAVES SUBSIDING TO 2 TO 4 FEET.
.WEDNESDAY...NORTH WINDS 5 TO 15 KNOTS VEERING SOUTHEAST BY MID
AFTERNOON. ISOLATED SNOW SHOWERS THROUGH EARLY AFTERNOON. WAVES
SUBSIDING TO CALM TO 2 FEET.
.WEDNESDAY NIGHT...SOUTHEAST WINDS 10 TO 20 KNOTS VEERING SOUTH
AFTER MIDNIGHT. WAVES BUILDING TO 1 TO 3 FEET.
.THURSDAY...SOUTH WINDS 15 TO 25 KNOTS. A SLIGHT CHANCE OF RAIN
AND SNOW BY MID AFTERNOON. WAVES BUILDING TO 2 TO 4 FEET...THEN
SUBSIDING TO 1 TO 3 FEET.
.THURSDAY NIGHT...SOUTH WINDS 10 TO 20 KNOTS VEERING SOUTHWEST
AFTER MIDNIGHT. RAIN...POSSIBLY MIXED WITH SNOW THROUGH
MIDNIGHT...THEN A CHANCE OF RAIN...POSSIBLY MIXED WITH SNOW.
WAVES SUBSIDING TO CALM TO 2 FEET.
.FRIDAY...WEST WINDS 10 TO 20 KNOTS VEERING NORTH BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
.FRIDAY NIGHT...NORTHEAST WINDS 15 TO 25 KNOTS. WAVES BUILDING TO
3 TO 5 FEET.
.SATURDAY...EAST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO
30 KNOTS. A CHANCE OF FREEZING RAIN AND SNOW. WAVES 3 TO 6 FEET.
.SUNDAY...EAST WINDS 15 TO 25 KNOTS BECOMING SOUTHEAST 10 TO
20 KNOTS. A CHANCE OF FREEZING RAIN...RAIN AND SNOW. WAVES
SUBSIDING TO CALM TO 2 FEET.

$$

LSZ266-220415-
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 TUE MAR 21 2017

...GALE WARNING IN EFFECT UNTIL 2 AM EDT WEDNESDAY...

.LATE THIS AFTERNOON...NORTHWEST GALES TO 40 KNOTS. FREEZING
SPRAY. ISOLATED SNOW SHOWERS. WAVES 6 TO 10 FEET.
.TONIGHT...NORTH GALES TO 35 KNOTS DIMINISHING TO 15 TO 25 KNOTS
AFTER MIDNIGHT. FREEZING SPRAY. ISOLATED SNOW SHOWERS. WAVES
BUILDING TO 7 TO 11 FEET...THEN SUBSIDING TO 3 TO 5 FEET.
.WEDNESDAY...NORTH WINDS 5 TO 15 KNOTS BACKING WEST BY MID
AFTERNOON. ISOLATED SNOW SHOWERS THROUGH EARLY AFTERNOON. WAVES
SUBSIDING TO CALM TO 2 FEET.
.WEDNESDAY NIGHT...SOUTH WINDS 5 TO 15 KNOTS INCREASING TO 15 TO
25 KNOTS AFTER MIDNIGHT. WAVES BUILDING TO 2 TO 4 FEET.
.THURSDAY...SOUTH WINDS 20 TO 30 KNOTS. A SLIGHT CHANCE OF RAIN
AND SNOW BY MID AFTERNOON. WAVES BUILDING TO 3 TO 6 FEET.
.THURSDAY NIGHT...SOUTH WINDS 15 TO 25 KNOTS BECOMING SOUTHWEST
10 TO 20 KNOTS AFTER MIDNIGHT. RAIN AND SNOW THROUGH MIDNIGHT.
RAIN AND A CHANCE OF SNOW AFTER MIDNIGHT. WAVES SUBSIDING TO 1 TO
3 FEET.
.FRIDAY...WEST WINDS 10 TO 20 KNOTS VEERING NORTH BY MID
AFTERNOON. WAVES 1 TO 3 FEET.
.FRIDAY NIGHT...NORTHEAST WINDS 15 TO 25 KNOTS. WAVES BUILDING TO
3 TO 6 FEET.
.SATURDAY...EAST WINDS 15 TO 25 KNOTS. WAVES 3 TO 6 FEET.
.SUNDAY...EAST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS. A CHANCE OF FREEZING RAIN...RAIN AND SNOW. WAVES
SUBSIDING TO CALM TO 2 FEET.

$$

LSZ267-220415-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
401 PM EDT TUE MAR 21 2017

...GALE WARNING IN EFFECT UNTIL 2 AM EDT WEDNESDAY...

.LATE THIS AFTERNOON...NORTHWEST GALES TO 40 KNOTS. FREEZING
SPRAY. ISOLATED SNOW SHOWERS. WAVES 6 TO 10 FEET.
.TONIGHT...NORTH GALES TO 35 KNOTS DIMINISHING TO 15 TO 25 KNOTS
AFTER MIDNIGHT. FREEZING SPRAY. ISOLATED SNOW SHOWERS. WAVES
SUBSIDING TO 3 TO 5 FEET.
.WEDNESDAY...NORTH WINDS 10 TO 20 KNOTS BECOMING NORTHWEST 5 TO
15 KNOTS BY MID AFTERNOON. ISOLATED SNOW SHOWERS THROUGH EARLY
AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.WEDNESDAY NIGHT...SOUTH WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS AFTER MIDNIGHT. WAVES BUILDING TO 1 TO 3 FEET.
.THURSDAY...SOUTH WINDS 15 TO 25 KNOTS INCREASING TO 20 TO
30 KNOTS BY MID AFTERNOON. WAVES BUILDING TO 3 TO 5 FEET.
.THURSDAY NIGHT...SOUTH WINDS 20 TO 30 KNOTS DIMINISHING TO 10 TO
20 KNOTS AFTER MIDNIGHT. RAIN. SNOW LIKELY THROUGH MIDNIGHT. A
CHANCE OF SNOW AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.FRIDAY...WEST WINDS 10 TO 20 KNOTS VEERING NORTHWEST BY MID
AFTERNOON. A CHANCE OF FREEZING RAIN THROUGH EARLY AFTERNOON.
WAVES CALM TO 2 FEET.
.FRIDAY NIGHT...NORTH WINDS 10 TO 20 KNOTS BECOMING NORTHEAST
15 TO 25 KNOTS AFTER MIDNIGHT. WAVES BUILDING TO 2 TO 4 FEET.
.SATURDAY...EAST WINDS 15 TO 25 KNOTS. A CHANCE OF SNOW...
POSSIBLY MIXED WITH FREEZING RAIN. WAVES 2 TO 4 FEET.
.SUNDAY...EAST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS. A CHANCE OF RAIN...FREEZING RAIN AND SNOW. WAVES
SUBSIDING TO CALM TO 2 FEET.

$$

LSZ261-220415-
MAFOR 2121/
SUPERIOR WEST 11730 12830 11120 11110 11200 12300. WAVES 1 TO 5
FEET.

SUPERIOR NORTH CENTRAL 11740 12840 11830 11820 11810 11700 11600.
FREEZING SPRAY THIS EVENING. WAVES 3 TO 7 FEET TONIGHT SUBSIDING
TO 1 TO 3 FEET WEDNESDAY.

SUPERIOR SOUTH CENTRAL...GALE WARNING IN EFFECT...11750 11740
12840 11820 11810 11700 11600. FREEZING SPRAY THIS EVENING. WAVES
4 TO 9 FEET TONIGHT SUBSIDING TO 1 TO 3 FEET WEDNESDAY.

SUPERIOR EAST...GALE WARNING IN EFFECT...11750 11850 12840 12820
11810 11700. FREEZING SPRAY THIS EVENING. WAVES 6 TO 10 FEET
SUBSIDING TO 4 TO 7 FEET TONIGHT. WAVES SUBSIDING TO 1 TO 3 FEET
WEDNESDAY.

$$

KLUBER



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