Great Lakes Forecast
Issued by NWS

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FZUS63 KMQT 190755
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
355 AM EDT SUN MAR 19 2017

FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE SUPERIOR

.SYNOPSIS...A 30.4 INCH RIDGE OVER THE UPPER GREAT LAKES THIS
MORNING WILL DRIFT EASTWARD TO THE LOWER GREAT LAKES THIS
AFTERNOON. A 29.9 INCH TROUGH WILL FOLLOW ACROSS THE UPPER GREAT
LAKES TONIGHT AND MOVE INTO THE LOWER GREAT LAKES ON MONDAY. A
30.6 INCH HIGH PRESSURE WILL MOVE INTO SOUTH CENTRAL CANADA MONDAY
NIGHT AND WILL BUILD INTO THE UPPER GREAT LAKES ON WEDNESDAY WHILE
STRENGTHENING TO 30.7 INCHES. THE RIDGE WILL CONTINUE TO THE EAST
COAST ON THURSDAY AS A 29.4 INCH LOW PRESSURE ORGANIZES OVER THE
CENTRAL PLAINS.

LSZ162-191600-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
355 AM EDT SUN MAR 19 2017 /255 AM CDT SUN MAR 19 2017/

.TODAY...SOUTH WINDS 5 TO 15 KNOTS. ISOLATED RAIN SHOWERS BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
.TONIGHT...SOUTHWEST WINDS 5 TO 15 KNOTS BECOMING WEST 10 TO
20 KNOTS AFTER MIDNIGHT. ISOLATED RAIN SHOWERS THROUGH MIDNIGHT.
WAVES BUILDING TO 1 TO 3 FEET...THEN SUBSIDING TO CALM TO 2 FEET.
.MONDAY...WEST WINDS 10 TO 20 KNOTS. WAVES BUILDING TO 1 TO
3 FEET.
.MONDAY NIGHT...WEST WINDS 10 TO 20 KNOTS BECOMING NORTHWEST
15 TO 25 KNOTS AFTER MIDNIGHT. WAVES BUILDING TO 2 TO 4 FEET.
.TUESDAY...NORTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.TUESDAY NIGHT...NORTH WINDS 10 TO 20 KNOTS BECOMING NORTHEAST
5 TO 15 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.WEDNESDAY...EAST WINDS 5 TO 15 KNOTS BECOMING SOUTH 10 TO
20 KNOTS. A CHANCE OF SNOW SHOWERS. WAVES BUILDING TO 1 TO
3 FEET.
.THURSDAY...SOUTH WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS. A CHANCE OF RAIN AND SNOW SHOWERS...THEN RAIN SHOWERS...
POSSIBLY MIXED WITH SNOW. WAVES SUBSIDING TO CALM TO 2 FEET.

$$

LSZ263-191600-
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-
355 AM EDT SUN MAR 19 2017

.TODAY...SOUTH WINDS 5 TO 15 KNOTS. ISOLATED RAIN SHOWERS BY MID
AFTERNOON. WAVES CALM TO 2 FEET BUILDING TO 1 TO 3 FEET.
.TONIGHT...SOUTHWEST WINDS 10 TO 20 KNOTS VEERING WEST AFTER
MIDNIGHT. ISOLATED RAIN SHOWERS THROUGH MIDNIGHT. WAVES BUILDING
TO 2 TO 4 FEET...THEN SUBSIDING TO 1 TO 3 FEET.
.MONDAY...WEST WINDS 10 TO 20 KNOTS. WAVES 1 TO 3 FEET.
.MONDAY NIGHT...WEST WINDS 5 TO 15 KNOTS BECOMING NORTHWEST 10 TO
20 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF RAIN AND SNOW SHOWERS
AFTER MIDNIGHT. WAVES BUILDING TO 3 TO 5 FEET.
.TUESDAY...NORTH WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS BY MID AFTERNOON. A CHANCE OF SNOW SHOWERS. WAVES
SUBSIDING TO 1 TO 3 FEET.
.TUESDAY NIGHT...NORTH WINDS 5 TO 15 KNOTS. WAVES 1 TO 3 FEET.
.WEDNESDAY...NORTHEAST WINDS 5 TO 15 KNOTS VEERING SOUTH. A
CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO CALM TO 2 FEET...THEN
BUILDING TO 1 TO 3 FEET.
.THURSDAY...SOUTH WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS. A CHANCE OF RAIN AND SNOW SHOWERS...THEN RAIN AND SNOW
SHOWERS LIKELY. WAVES BUILDING TO 2 TO 4 FEET...THEN SUBSIDING TO
CALM TO 2 FEET.

$$

LSZ264-191600-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
355 AM EDT SUN MAR 19 2017

.EARLY THIS MORNING...EAST WINDS LESS THAN 10 KNOTS. WAVES CALM
TO 2 FEET.
.TODAY...SOUTH WINDS 5 TO 15 KNOTS INCREASING TO 10 TO 20 KNOTS
LATE. ISOLATED RAIN AND SNOW SHOWERS BY MID AFTERNOON. WAVES
BUILDING TO 3 TO 6 FEET.
.TONIGHT...SOUTH WINDS 10 TO 20 KNOTS VEERING WEST AFTER
MIDNIGHT. ISOLATED RAIN SHOWERS THROUGH MIDNIGHT. WAVES SUBSIDING
TO 2 TO 4 FEET.
.MONDAY...NORTHWEST WINDS 5 TO 15 KNOTS BECOMING WEST 10 TO
20 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO 1 TO 3 FEET...THEN
BUILDING TO 2 TO 4 FEET.
.MONDAY NIGHT...WEST WINDS 10 TO 20 KNOTS VEERING NORTHWEST AFTER
MIDNIGHT. A CHANCE OF SNOW SHOWERS...POSSIBLY MIXED WITH RAIN.
WAVES BUILDING TO 3 TO 6 FEET.
.TUESDAY...NORTH WINDS 10 TO 20 KNOTS. FREEZING SPRAY THROUGH
EARLY AFTERNOON. A CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO
3 TO 5 FEET.
.TUESDAY NIGHT...NORTH WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS AFTER MIDNIGHT. A CHANCE OF SNOW SHOWERS. WAVES
SUBSIDING TO 1 TO 3 FEET.
.WEDNESDAY...NORTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTH. WAVES
SUBSIDING TO CALM TO 2 FEET...THEN BUILDING TO 1 TO 3 FEET.
.THURSDAY...SOUTH WINDS 10 TO 20 KNOTS. SNOW SHOWERS...POSSIBLY
MIXED WITH RAIN SHOWERS. WAVES BUILDING TO 3 TO 5 FEET...THEN
SUBSIDING TO 1 TO 3 FEET.

$$

LSZ265-191600-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
355 AM EDT SUN MAR 19 2017

.EARLY THIS MORNING...WEST WINDS 5 TO 15 KNOTS. ISOLATED SNOW
SHOWERS...PATCHY DRIZZLE AND FREEZING DRIZZLE. WAVES CALM TO
2 FEET.
.TODAY...SOUTH WINDS 5 TO 15 KNOTS INCREASING TO 10 TO 20 KNOTS
BY MID AFTERNOON. ISOLATED RAIN SHOWERS BY MID AFTERNOON. WAVES
BUILDING TO 3 TO 5 FEET.
.TONIGHT...SOUTH WINDS 10 TO 20 KNOTS VEERING WEST AFTER
MIDNIGHT. SCATTERED RAIN SHOWERS THROUGH MIDNIGHT. WAVES
SUBSIDING TO 1 TO 3 FEET.
.MONDAY...WEST WINDS 15 TO 25 KNOTS. WAVES 1 TO 3 FEET.
.MONDAY NIGHT...WEST WINDS 15 TO 25 KNOTS VEERING NORTHWEST AFTER
MIDNIGHT. A CHANCE OF SNOW SHOWERS...POSSIBLY MIXED WITH RAIN
AFTER MIDNIGHT. WAVES BUILDING TO 3 TO 5 FEET.
.TUESDAY...NORTH WINDS 20 TO 30 KNOTS. FREEZING SPRAY. A CHANCE
OF SNOW SHOWERS. WAVES BUILDING TO 3 TO 6 FEET.
.TUESDAY NIGHT...NORTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS AFTER MIDNIGHT. FREEZING SPRAY THROUGH MIDNIGHT. A
CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO 2 TO 4 FEET.
.WEDNESDAY...NORTH WINDS 5 TO 15 KNOTS BECOMING SOUTH 10 TO
20 KNOTS. WAVES SUBSIDING TO CALM TO 2 FEET...THEN BUILDING TO
1 TO 3 FEET.
.THURSDAY...SOUTH WINDS 15 TO 25 KNOTS. RAIN SHOWERS AND SNOW
SHOWERS LIKELY. WAVES BUILDING TO 2 TO 4 FEET...THEN SUBSIDING TO
CALM TO 2 FEET.

$$

LSZ266-191600-
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-
355 AM EDT SUN MAR 19 2017

.EARLY THIS MORNING...WEST WINDS 5 TO 15 KNOTS. PATCHY DRIZZLE.
WAVES CALM TO 2 FEET.
.TODAY...SOUTH WINDS 5 TO 15 KNOTS INCREASING TO 15 TO 25 KNOTS
BY MID AFTERNOON. ISOLATED RAIN SHOWERS BY MID AFTERNOON. WAVES
BUILDING TO 3 TO 6 FEET.
.TONIGHT...SOUTH WINDS 15 TO 25 KNOTS VEERING SOUTHWEST AFTER
MIDNIGHT. SCATTERED RAIN SHOWERS. WAVES BUILDING TO 4 TO 7 FEET...
THEN SUBSIDING TO 3 TO 5 FEET.
.MONDAY...NORTHWEST WINDS 15 TO 25 KNOTS BACKING WEST BY MID
AFTERNOON. WAVES SUBSIDING TO 2 TO 4 FEET.
.MONDAY NIGHT...WEST WINDS 15 TO 25 KNOTS BECOMING NORTHWEST
20 TO 30 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN SHOWERS. A CHANCE
OF SNOW SHOWERS AFTER MIDNIGHT. WAVES BUILDING TO 3 TO 5 FEET...
THEN SUBSIDING TO 2 TO 4 FEET.
.TUESDAY...NORTH WINDS 20 TO 30 KNOTS. FREEZING SPRAY. A CHANCE
OF SNOW SHOWERS. WAVES BUILDING TO 4 TO 7 FEET.
.TUESDAY NIGHT...NORTH WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS AFTER MIDNIGHT. FREEZING SPRAY. A CHANCE OF SNOW
SHOWERS. WAVES SUBSIDING TO 2 TO 4 FEET.
.WEDNESDAY...NORTH WINDS 10 TO 20 KNOTS VEERING SOUTH. WAVES
2 TO 4 FEET.
.THURSDAY...SOUTH WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS. SNOW SHOWERS...POSSIBLY MIXED WITH RAIN SHOWERS. WAVES
BUILDING TO 3 TO 6 FEET...THEN SUBSIDING TO 1 TO 3 FEET.

$$

LSZ267-191600-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
355 AM EDT SUN MAR 19 2017

.EARLY THIS MORNING...WEST WINDS 5 TO 15 KNOTS. ISOLATED SNOW
SHOWERS...PATCHY DRIZZLE AND FREEZING DRIZZLE. WAVES CALM TO
2 FEET.
.TODAY...SOUTH WINDS 5 TO 15 KNOTS INCREASING TO 10 TO 20 KNOTS
BY MID AFTERNOON. WAVES BUILDING TO 1 TO 3 FEET.
.TONIGHT...SOUTH WINDS 15 TO 25 KNOTS VEERING SOUTHWEST AFTER
MIDNIGHT. SCATTERED RAIN SHOWERS. WAVES BUILDING TO 3 TO 6 FEET.
.MONDAY...WEST WINDS 15 TO 25 KNOTS VEERING NORTHWEST BY MID
AFTERNOON. WAVES SUBSIDING TO 2 TO 4 FEET.
.MONDAY NIGHT...WEST WINDS 10 TO 20 KNOTS BECOMING NORTHWEST 15
TO 25 KNOTS AFTER MIDNIGHT. A CHANCE OF SNOW SHOWERS...POSSIBLY
MIXED WITH RAIN AFTER MIDNIGHT. WAVES BUILDING TO 3 TO 5 FEET.
.TUESDAY...NORTH WINDS 20 TO 30 KNOTS BECOMING NORTHWEST BY MID
AFTERNOON. FREEZING SPRAY. A CHANCE OF SNOW SHOWERS. WAVES
BUILDING TO 4 TO 7 FEET.
.TUESDAY NIGHT...NORTH WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS AFTER MIDNIGHT. FREEZING SPRAY. A CHANCE OF SNOW
SHOWERS. WAVES SUBSIDING TO 2 TO 4 FEET.
.WEDNESDAY...NORTHWEST WINDS 10 TO 20 KNOTS BACKING SOUTH. WAVES
SUBSIDING TO CALM TO 2 FEET.
.THURSDAY...SOUTH WINDS 15 TO 25 KNOTS. SNOW SHOWERS LIKELY...
POSSIBLY MIXED WITH RAIN SHOWERS. WAVES BUILDING TO 2 TO 4 FEET...
THEN SUBSIDING TO 1 TO 3 FEET.

$$

LSZ261-191600-
MAFOR 1909/
SUPERIOR WEST 13410 11310 11410 12520 11620. WAVES 1 TO 3 FEET.

SUPERIOR NORTH CENTRAL 11200 11410 12420 11430 11420 12520. WAVES
1 TO 3 FEET BUILDING TO 3 TO 5 FEET TODAY. WAVES 3 TO 6 FEET
TONIGHT.

SUPERIOR SOUTH CENTRAL 11600 11500 12420 12430 11420 11520. AREAS
OF DRIZZLE AND LIGHT FREEZING DRIZZLE EARLY THIS MORNING...THEN
PATCHY LIGHT FREEZING DRIZZLE THROUGH MID MORNING. SCATTERED RAIN
SHOWERS THIS EVENING. WAVES 2 FEET OR LESS BUILDING TO 2 TO 4
FEET TODAY. WAVES 3 TO 5 FEET SUBSIDING TO 2 TO 4 FEET TONIGHT.

SUPERIOR EAST 11100 11400 11410 11420 13430 11530. SCATTERED RAIN
SHOWERS TONIGHT. WAVES 1 TO 3 FEET TODAY. WAVES 3 TO 5 FEET
BUILDING TO 4 TO 7 FEET TONIGHT.

$$

07



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