Great Lakes Forecast
Issued by NWS

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103
FZUS63 KMQT 231346
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
946 AM EDT THU MAR 23 2017

FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE SUPERIOR

.SYNOPSIS...30.6 INCH HIGH PRESSURE CENTERED OVER LOWER GREAT
LAKES THIS MORNING WILL DRIFT TO THE EAST COAST THIS EVENING AS A
29.5 INCH LOW PRESSURE ORGANIZES OVER THE WESTERN PLAINS. A 29.9
INCH TROUGH MOVES ACROSS THE UPPER GREAT LAKES TONIGHT. ON FRIDAY
AFTERNOON...THIS LOW WILL MOVE INTO THE CENTRAL PLAINS AS 30.5
INCH HIGH PRESSURE BUILDS OVER NORTHERN ONTARIO. THE HIGH WILL
BUILD TO 30.6 INCHES OVER JAMES BAY SATURDAY AFTERNOON AS THE LOW
WEAKENS TO 29.7 INCHES OVER WESTERN ILLINOIS. HIGH PRESSURE WILL
LIFT MOVE TO NEW ENGLAND ON SUNDAY WHILE THE LOW OVER ILLINOIS
FURTHER WEAKENS. A 29.9 INCH RIDGE WILL BUILD OVER THE UPPER GREAT
LAKES MONDAY.

LSZ162-232200-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
946 AM EDT THU MAR 23 2017 /846 AM CDT THU MAR 23 2017/

.REST OF TODAY...SOUTH WINDS 10 TO 20 KNOTS. A SLIGHT CHANCE OF
SNOW BY LATE MORNING. A CHANCE OF RAIN. WAVES 2 TO 4 FEET
SUBSIDING TO CALM TO 2 FEET.
.TONIGHT...SOUTH WINDS 5 TO 15 KNOTS BECOMING NORTHEAST LESS THAN
10 KNOTS AFTER MIDNIGHT. RAIN. A SLIGHT CHANCE OF SNOW AFTER
MIDNIGHT. WAVES CALM TO 2 FEET.
.FRIDAY...NORTH WINDS 5 TO 15 KNOTS BECOMING NORTHEAST 10 TO
20 KNOTS BY MID AFTERNOON. A SLIGHT CHANCE OF RAIN. WAVES CALM TO
2 FEET.
.FRIDAY NIGHT...NORTHEAST WINDS 15 TO 25 KNOTS INCREASING TO
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 BY MID AFTERNOON. WAVES 3 TO 6 FEET.
.SATURDAY NIGHT...EAST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET.
.SUNDAY...EAST WINDS 10 TO 20 KNOTS BECOMING NORTHEAST 5 TO
15 KNOTS. A CHANCE OF RAIN SHOWERS...POSSIBLY MIXED WITH FREEZING
RAIN. WAVES SUBSIDING TO CALM TO 2 FEET.
.MONDAY...NORTH WINDS 5 TO 15 KNOTS BACKING NORTHWEST. WAVES CALM
TO 2 FEET.

$$

LSZ263-232200-
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-
946 AM EDT THU MAR 23 2017

.REST OF TODAY...SOUTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS BY MID AFTERNOON. A SLIGHT CHANCE OF SNOW BY LATE
MORNING. A CHANCE OF RAIN. WAVES 2 TO 4 FEET SUBSIDING TO 1 TO
3 FEET.
.TONIGHT...SOUTH WINDS 5 TO 15 KNOTS VEERING WEST AFTER MIDNIGHT.
RAIN...POSSIBLY MIXED WITH SNOW. WAVES SUBSIDING TO CALM TO
2 FEET.
.FRIDAY...NORTH WINDS 5 TO 15 KNOTS BECOMING NORTHEAST 10 TO
20 KNOTS BY MID AFTERNOON. A SLIGHT CHANCE OF RAIN. WAVES
BUILDING TO 1 TO 3 FEET.
.FRIDAY NIGHT...NORTHEAST WINDS 15 TO 25 KNOTS. A SLIGHT CHANCE
OF RAIN THROUGH MIDNIGHT. WAVES BUILDING TO 3 TO 6 FEET.
.SATURDAY...EAST WINDS 15 TO 25 KNOTS. WAVES 3 TO 6 FEET.
.SATURDAY NIGHT...EAST WINDS 10 TO 20 KNOTS. WAVES SUBSIDING TO
2 TO 4 FEET.
.SUNDAY...EAST WINDS 5 TO 15 KNOTS BACKING NORTHEAST. A CHANCE OF
RAIN SHOWERS...POSSIBLY MIXED WITH FREEZING RAIN. WAVES SUBSIDING
TO CALM TO 2 FEET.
.MONDAY...NORTH WINDS 5 TO 15 KNOTS BACKING WEST. A CHANCE OF
FREEZING RAIN. WAVES CALM TO 2 FEET.

$$

LSZ264-232200-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
946 AM EDT THU MAR 23 2017

.REST OF TODAY...SOUTH WINDS 15 TO 25 KNOTS. A SLIGHT CHANCE OF
SNOW BY LATE MORNING. A CHANCE OF RAIN. WAVES 2 TO 4 FEET
BUILDING TO 3 TO 6 FEET.
.TONIGHT...SOUTH WINDS 15 TO 25 KNOTS BECOMING SOUTHWEST 5 TO
15 KNOTS AFTER MIDNIGHT. SNOW LIKELY THROUGH MIDNIGHT. RAIN. A
CHANCE OF SNOW AFTER MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET.
.FRIDAY...NORTH WINDS 5 TO 15 KNOTS INCREASING TO 10 TO 20 KNOTS
BY MID AFTERNOON. A SLIGHT CHANCE OF RAIN THROUGH EARLY
AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET...THEN BUILDING TO
1 TO 3 FEET.
.FRIDAY NIGHT...NORTHEAST WINDS 15 TO 25 KNOTS. A SLIGHT CHANCE
OF RAIN...FREEZING RAIN AND SNOW THROUGH MIDNIGHT. WAVES BUILDING
TO 3 TO 6 FEET.
.SATURDAY...EAST WINDS 10 TO 20 KNOTS. WAVES SUBSIDING TO 2 TO
4 FEET.
.SATURDAY NIGHT...EAST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS AFTER MIDNIGHT. WAVES 2 TO 4 FEET.
.SUNDAY...EAST WINDS 5 TO 15 KNOTS BACKING NORTHEAST. A CHANCE OF
FREEZING RAIN. A CHANCE OF RAIN SHOWERS. WAVES SUBSIDING TO CALM
TO 2 FEET.
.MONDAY...NORTHWEST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.

$$

LSZ265-232200-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
946 AM EDT THU MAR 23 2017

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

$$

LSZ266-232200-
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-
946 AM EDT THU MAR 23 2017

.REST OF TODAY...SOUTH WINDS 15 TO 25 KNOTS INCREASING TO 20 TO
30 KNOTS THIS MID AFTERNOON. A SLIGHT CHANCE OF RAIN BY MID
AFTERNOON. WAVES 3 TO 5 FEET BUILDING TO 4 TO 7 FEET...THEN
SUBSIDING TO 3 TO 6 FEET.
.TONIGHT...SOUTH WINDS 20 TO 30 KNOTS DIMINISHING TO 10 TO
20 KNOTS AFTER MIDNIGHT. RAIN...POSSIBLY MIXED WITH SNOW AND
FREEZING RAIN. WAVES BUILDING TO 4 TO 7 FEET...THEN SUBSIDING TO
1 TO 3 FEET.
.FRIDAY...NORTHWEST WINDS 5 TO 15 KNOTS BECOMING NORTH 10 TO
20 KNOTS BY MID AFTERNOON. A CHANCE OF RAIN. WAVES SUBSIDING TO
CALM TO 2 FEET...THEN BUILDING TO 1 TO 3 FEET.
.FRIDAY NIGHT...NORTHEAST WINDS 15 TO 25 KNOTS INCREASING TO
20 TO 30 KNOTS AFTER MIDNIGHT. WAVES BUILDING TO 3 TO 6 FEET.
.SATURDAY...EAST WINDS 15 TO 25 KNOTS. WAVES SUBSIDING TO 3 TO
5 FEET.
.SATURDAY NIGHT...EAST WINDS 15 TO 25 KNOTS. A CHANCE OF RAIN
SHOWERS. A CHANCE OF FREEZING RAIN AFTER MIDNIGHT. WAVES
SUBSIDING TO 2 TO 4 FEET.
.SUNDAY...EAST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO 15 KNOTS.
A CHANCE OF FREEZING RAIN. A CHANCE OF RAIN SHOWERS. WAVES
SUBSIDING TO CALM TO 2 FEET.
.MONDAY...NORTHWEST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS. A CHANCE OF RAIN AND SNOW SHOWERS. WAVES CALM TO
2 FEET.

$$

LSZ267-232200-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
946 AM EDT THU MAR 23 2017

.REST OF TODAY...SOUTH WINDS 15 TO 25 KNOTS. A SLIGHT CHANCE OF
RAIN BY MID AFTERNOON. WAVES 1 TO 3 FEET BUILDING TO 3 TO 5 FEET.
.TONIGHT...SOUTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN AND SNOW...POSSIBLY
MIXED WITH FREEZING RAIN AND SLEET. WAVES SUBSIDING TO CALM TO 2
FEET.
.FRIDAY...WEST WINDS 5 TO 15 KNOTS VEERING NORTH BY MID
AFTERNOON. A SLIGHT CHANCE OF FREEZING RAIN THROUGH EARLY
AFTERNOON. A CHANCE OF RAIN. WAVES CALM TO 2 FEET.
.FRIDAY NIGHT...NORTHEAST WINDS 10 TO 20 KNOTS INCREASING TO
15 TO 25 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF RAIN THROUGH
MIDNIGHT. WAVES BUILDING TO 3 TO 5 FEET.
.SATURDAY...EAST WINDS 15 TO 25 KNOTS. WAVES SUBSIDING TO 1 TO
3 FEET.
.SATURDAY NIGHT...EAST WINDS 15 TO 25 KNOTS. A CHANCE OF FREEZING
RAIN...POSSIBLY MIXED WITH RAIN SHOWERS AND SLEET. WAVES 1 TO
3 FEET.
.SUNDAY...EAST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO 15 KNOTS.
RAIN SHOWERS LIKELY...POSSIBLY MIXED WITH FREEZING RAIN. WAVES
SUBSIDING TO CALM TO 2 FEET.
.MONDAY...NORTHWEST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS. A CHANCE OF RAIN SHOWERS. A CHANCE OF SNOW SHOWERS.
WAVES CALM TO 2 FEET.

$$
LSZ261-232200-
MAFOR 2315/
SUPERIOR WEST 11430 11420 11400 12406 11506 11706 11700. CHANCE
OF RAIN LATE THIS AFTERNOON THROUGH EARLY EVENING TONIGHT. CHANCE
OF RAIN THROUGH MID MORNING FRIDAY MORNING. WAVES 2 TO 4 FEET
SUBSIDING TO 1 TO 3 FEET THIS AFTERNOON. WAVES 2 FEET OR LESS
TONIGHT AND FRIDAY MORNING.

SUPERIOR NORTH CENTRAL 13430 12437 11416 11506 11710. CHANCE OF
RAIN THROUGH EARLY EVENING. CHANCE OF SNOW AFTER MIDNIGHT
TONIGHT. WAVES 2 TO 4 FEET BUILDING TO 3 TO 6 FEET THIS
AFTERNOON. WAVES 3 TO 6 FEET SUBSIDING TO 2 TO 4 FEET TONIGHT.
WAVES 1 TO 3 FEET FRIDAY MORNING.

SUPERIOR SOUTH CENTRAL 13430 12436 11416 11506 11600. CHANCE OF
RAIN THROUGH EARLY EVENING TONIGHT. CHANCE OF RAIN LATE FRIDAY
MORNING. WAVES 2 TO 4 FEET BUILDING TO 3 TO 5 FEET THIS
AFTERNOON. WAVES 3 TO 5 FEET SUBSIDING TO 1 TO 3 FEET TONIGHT.
WAVES 1 FOOT OR LESS FRIDAY MORNING.

SUPERIOR EAST 12430 12440 11437 11426 11416 11600. CHANCE OF RAIN
AND SNOW LATE IN THE EVENING. CHANCE OF SNOW AND LIGHT FREEZING
RAIN AFTER MIDNIGHT. CHANCE OF RAIN FRIDAY MORNING. WAVES 3 TO 5
FEET THIS AFTERNOON. WAVES 3 TO 6 FEET SUBSIDING TO 2 TO 4 FEET
TONIGHT. WAVES 1 TO 3 FEET FRIDAY MORNING.

$$

VOSS



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