Great Lakes Forecast
Issued by NWS

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FZUS63 KMQT 030757
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
357 AM EDT FRI JUL 3 2015

FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE SUPERIOR

.SYNOPSIS...A 30.0 INCH HIGH PRESSURE RIDGE OVER THE GREAT LAKES
WILL DISSIPATE TODAY. MEANWHILE...A LOW PRESSURE TROUGH OF 29.7
INCHES OVER NORTHERN ONTARIO WILL WEAKEN TO 29.8 INCHES AS IT MOVES
SOUTHEAST...CROSSING LAKE SUPERIOR LATE THIS AFTERNOON AND EVENING.
IN ITS WAKE...A WEAK HIGH PRESSURE RIDGE OF 30.0 INCHES WILL BUILD
OVER THE UPPER GREAT LAKES ON SATURDAY AND THEN SHIFT TO THE EAST
COAST BY LATE SUNDAY EVENING. A LOW PRESSURE TROUGH AVERAGING 29.7
INCHES EXTENDING FROM HUDSON BAY TO THE CENTRAL PLAINS SUNDAY
AFTERNOON WILL MOVE EAST...CROSSING THE UPPER GREAT LAKES MONDAY. AS
THE TROUGH MOVES TO THE LOWER GREAT LAKES BY LATE TUESDAY...HIGH
PRESSURE OF 30.1 INCHES WILL BUILD INTO THE UPPER GREAT LAKES.

LSZ162-031600-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
357 AM EDT FRI JUL 3 2015

.EARLY THIS MORNING...SOUTHWEST WINDS 15 TO 25 KNOTS. ISOLATED
SHOWERS AND THUNDERSTORMS. WAVES 1 TO 3 FEET.
.TODAY...SOUTHWEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS BY MID AFTERNOON. ISOLATED THUNDERSTORMS THROUGH EARLY
AFTERNOON. ISOLATED SHOWERS. WAVES SUBSIDING TO CALM TO 2 FEET.
.TONIGHT...NORTH WINDS 5 TO 15 KNOTS VEERING NORTHEAST AFTER
MIDNIGHT. WAVES CALM TO 2 FEET.
.SATURDAY...EAST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
.SATURDAY NIGHT...NORTHEAST WINDS 5 TO 15 KNOTS VEERING EAST
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.SUNDAY...EAST WINDS 5 TO 15 KNOTS VEERING SOUTH BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
.SUNDAY NIGHT...SOUTH WINDS 5 TO 15 KNOTS VEERING SOUTHWEST AFTER
MIDNIGHT. A CHANCE OF SHOWERS AND THUNDERSTORMS THROUGH
MIDNIGHT...THEN SHOWERS AND THUNDERSTORMS LIKELY. WAVES CALM TO 2
FEET.
.MONDAY...WEST WINDS 5 TO 15 KNOTS VEERING NORTHWEST. SHOWERS AND
THUNDERSTORMS LIKELY. AREAS OF FOG. WAVES CALM TO 2 FEET.
.TUESDAY...SOUTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTH. WAVES
CALM TO 2 FEET.

$$

LSZ263-031600-
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-
357 AM EDT FRI JUL 3 2015

.EARLY THIS MORNING...SOUTHWEST WINDS 15 TO 25 KNOTS. PATCHY FOG.
SCATTERED SHOWERS AND THUNDERSTORMS. WAVES 1 TO 3 FEET BUILDING
TO 2 TO 4 FEET.
.TODAY...SOUTHWEST WINDS 15 TO 25 KNOTS DIMINISHING TO 5 TO
15 KNOTS BY MID AFTERNOON. PATCHY FOG THROUGH EARLY AFTERNOON.
SCATTERED SHOWERS AND THUNDERSTORMS THROUGH EARLY AFTERNOON...THEN
ISOLATED RAIN SHOWERS. WAVES SUBSIDING TO 1 TO 3 FEET.
.TONIGHT...NORTH WINDS 5 TO 15 KNOTS. WAVES SUBSIDING TO CALM TO
2 FEET.
.SATURDAY...NORTHEAST WINDS LESS THAN 10 KNOTS BECOMING EAST 5 TO
15 KNOTS BY MID AFTERNOON. WAVES CALM TO 2 FEET.
.SATURDAY NIGHT...EAST WINDS 5 TO 15 KNOTS BECOMING SOUTHEAST
LESS THAN 10 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.SUNDAY...SOUTH WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
.SUNDAY NIGHT...SOUTH WINDS 10 TO 20 KNOTS VEERING SOUTHWEST
AFTER MIDNIGHT. A CHANCE OF SHOWERS AND THUNDERSTORMS THROUGH
MIDNIGHT...THEN SHOWERS AND THUNDERSTORMS LIKELY. WAVES CALM TO 2
FEET.
.MONDAY...WEST WINDS 5 TO 15 KNOTS VEERING NORTHWEST. SHOWERS AND
THUNDERSTORMS LIKELY. AREAS OF FOG. WAVES CALM TO 2 FEET.
.TUESDAY...NORTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST. WAVES
CALM TO 2 FEET.

$$

LSZ264-031600-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
357 AM EDT FRI JUL 3 2015

.EARLY THIS MORNING...SOUTHWEST WINDS 15 TO 25 KNOTS. PATCHY FOG.
SCATTERED SHOWERS AND THUNDERSTORMS. WAVES 1 TO 3 FEET BUILDING
TO 2 TO 4 FEET.
.TODAY...SOUTHWEST WINDS 15 TO 25 KNOTS BECOMING WEST 10 TO
20 KNOTS BY MID AFTERNOON. PATCHY FOG THROUGH EARLY AFTERNOON.
SCATTERED THUNDERSTORMS THROUGH EARLY AFTERNOON. SCATTERED RAIN
SHOWERS. WAVES SUBSIDING TO 1 TO 3 FEET.
.TONIGHT...NORTHWEST WINDS 5 TO 15 KNOTS. WAVES SUBSIDING TO CALM
TO 2 FEET.
.SATURDAY...NORTHWEST WINDS 5 TO 15 KNOTS BECOMING SOUTHWEST LESS
THAN 10 KNOTS BY MID AFTERNOON. WAVES CALM TO 2 FEET.
.SATURDAY NIGHT...SOUTH WINDS 5 TO 15 KNOTS BACKING SOUTHEAST
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.SUNDAY...SOUTHEAST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
.SUNDAY NIGHT...SOUTH WINDS 10 TO 20 KNOTS VEERING SOUTHWEST
AFTER MIDNIGHT. A CHANCE OF SHOWERS AND THUNDERSTORMS. WAVES
BUILDING TO 1 TO 3 FEET.
.MONDAY...WEST WINDS 10 TO 20 KNOTS VEERING NORTHWEST. SHOWERS
AND THUNDERSTORMS LIKELY. AREAS OF FOG. WAVES SUBSIDING TO CALM
TO 2 FEET.
.TUESDAY...WEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST. WAVES CALM
TO 2 FEET.

$$

LSZ265-031600-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
357 AM EDT FRI JUL 3 2015

.EARLY THIS MORNING...SOUTHWEST WINDS 15 TO 25 KNOTS. ISOLATED
SHOWERS. WAVES CALM TO 2 FEET BUILDING TO 1 TO 3 FEET.
.TODAY...SOUTHWEST WINDS 10 TO 20 KNOTS BECOMING WEST 5 TO
15 KNOTS BY MID AFTERNOON. ISOLATED SHOWERS. ISOLATED
THUNDERSTORMS BY MID AFTERNOON. WAVES SUBSIDING TO CALM TO
2 FEET.
.TONIGHT...NORTH WINDS 5 TO 15 KNOTS BACKING NORTHWEST AFTER
MIDNIGHT. ISOLATED SHOWERS AND THUNDERSTORMS THIS EVENING. WAVES
CALM TO 2 FEET.
.SATURDAY...NORTHWEST WINDS 5 TO 15 KNOTS BECOMING SOUTHEAST LESS
THAN 10 KNOTS BY MID AFTERNOON. WAVES CALM TO 2 FEET.
.SATURDAY NIGHT...SOUTHEAST WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
.SUNDAY...SOUTHEAST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
.SUNDAY NIGHT...SOUTH WINDS 10 TO 20 KNOTS. A CHANCE OF SHOWERS
AND THUNDERSTORMS. WAVES BUILDING TO 1 TO 3 FEET.
.MONDAY...SOUTHWEST WINDS 10 TO 20 KNOTS BECOMING NORTHWEST 5 TO
15 KNOTS. AREAS OF FOG. SHOWERS AND THUNDERSTORMS LIKELY. WAVES
SUBSIDING TO CALM TO 2 FEET.
.TUESDAY...NORTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST. WAVES
CALM TO 2 FEET.

$$

LSZ266-031600-
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-
357 AM EDT FRI JUL 3 2015

.EARLY THIS MORNING...SOUTHWEST WINDS 15 TO 25 KNOTS. SCATTERED
SHOWERS AND THUNDERSTORMS. WAVES 2 TO 4 FEET.
.TODAY...SOUTHWEST WINDS 10 TO 20 KNOTS VEERING WEST BY MID
AFTERNOON. ISOLATED SHOWERS AND THUNDERSTORMS. WAVES SUBSIDING TO
1 TO 3 FEET.
.TONIGHT...WEST WINDS 5 TO 15 KNOTS VEERING NORTHWEST AFTER
MIDNIGHT. ISOLATED SHOWERS AND THUNDERSTORMS THIS EVENING. WAVES
SUBSIDING TO CALM TO 2 FEET.
.SATURDAY...NORTHWEST WINDS 5 TO 15 KNOTS BECOMING WEST LESS THAN
10 KNOTS BY MID AFTERNOON. WAVES CALM TO 2 FEET.
.SATURDAY NIGHT...SOUTH WINDS 5 TO 15 KNOTS BACKING SOUTHEAST
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.SUNDAY...SOUTHEAST WINDS 10 TO 20 KNOTS VEERING SOUTH BY MID
AFTERNOON. WAVES BUILDING TO 1 TO 3 FEET.
.SUNDAY NIGHT...SOUTH WINDS 15 TO 25 KNOTS. WAVES BUILDING TO
2 TO 4 FEET.
.MONDAY...SOUTH WINDS 10 TO 20 KNOTS BECOMING NORTHWEST 5 TO
15 KNOTS. AREAS OF FOG. SHOWERS AND THUNDERSTORMS LIKELY. WAVES
SUBSIDING TO CALM TO 2 FEET...THEN BUILDING TO 1 TO 3 FEET.
.TUESDAY...NORTHWEST WINDS 5 TO 15 KNOTS BACKING WEST. WAVES
SUBSIDING TO CALM TO 2 FEET.

$$

LSZ267-031600-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
357 AM EDT FRI JUL 3 2015

.EARLY THIS MORNING...SOUTHWEST WINDS 15 TO 25 KNOTS. SCATTERED
SHOWERS AND THUNDERSTORMS. WAVES 1 TO 3 FEET BUILDING TO 2 TO
4 FEET.
.TODAY...SOUTHWEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS BY MID AFTERNOON. SCATTERED SHOWERS AND THUNDERSTORMS.
WAVES SUBSIDING TO CALM TO 2 FEET.
.TONIGHT...SOUTHWEST WINDS 5 TO 15 KNOTS VEERING NORTHWEST AFTER
MIDNIGHT. ISOLATED SHOWERS AND THUNDERSTORMS THIS EVENING. WAVES
CALM TO 2 FEET.
.SATURDAY...WEST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
.SATURDAY NIGHT...WEST WINDS 5 TO 15 KNOTS BACKING SOUTH AFTER
MIDNIGHT. WAVES CALM TO 2 FEET.
.SUNDAY...SOUTHEAST WINDS 5 TO 15 KNOTS BECOMING SOUTH 10 TO
20 KNOTS BY MID AFTERNOON. WAVES CALM TO 2 FEET.
.SUNDAY NIGHT...SOUTH WINDS 10 TO 20 KNOTS. WAVES BUILDING TO
1 TO 3 FEET.
.MONDAY...SOUTH WINDS 10 TO 20 KNOTS VEERING WEST. PATCHY FOG.
SHOWERS AND THUNDERSTORMS LIKELY. WAVES SUBSIDING TO CALM TO
2 FEET.
.TUESDAY...NORTHWEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS. WAVES CALM TO 2 FEET.

$$

LSZ261-031600-
MAFOR 0309/
SUPERIOR WEST 14520 11610 11700 11100 11200. WAVES 1 TO 4 FEET.

SUPERIOR NORTH CENTRAL 13530 11520 11620 13710. PATCHY FOG THIS
MORNING. SCATTERED SHOWERS AND THUNDERSTORMS THIS MORNING. WAVES
1 TO 4 FEET.

SUPERIOR SOUTH CENTRAL 13520 12610 13700. WAVES 1 TO 3 FEET.

SUPERIOR EAST 13520 11510 12500 11600 11700. SCATTERED SHOWERS
AND THUNDERSTORMS THROUGH THIS EVENING. WAVES 1 TO 4 FEET.

$$

ROLFSON



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