Great Lakes Forecast
Issued by NWS

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000
FZUS63 KMQT 242003
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
403 PM EDT MON AUG 24 2015

FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE SUPERIOR

.SYNOPSIS...A 29.5 INCH LOW PRESSURE OVER NORTHERN ONTARIO WILL MOVE
OVER JAMES BAY TONIGHT AND DRIFT OVER NORTHERN QUEBEC ON WEDNESDAY.
A 30.2 INCH HIGH PRESSURE CENTERED OVER MINNESOTA WEDNESDAY MORNING
WILL MOVE OVER THE GREAT LAKES THURSDAY AND REACH THE EAST COAST
FRIDAY. A 29.7 INCH LOW PRESSURE OVER THE CENTRAL PLAINS FRIDAY
MORNING WILL MOVE OVER THE MID MISSISSIPPI VALLEY SATURDAY...AS A
HIGH PRESSURE RIDGE OF 30.1 INCHES BUILDS OVER THE NORTHERN GREAT
LAKES.

LSZ162-250415-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
403 PM EDT MON AUG 24 2015 /303 PM CDT MON AUG 24 2015/

.LATE THIS AFTERNOON...NORTHWEST WINDS 20 TO 30 KNOTS. SCATTERED
SHOWERS. WAVES 3 TO 6 FEET BUILDING TO 4 TO 7 FEET.
.TONIGHT...NORTHWEST WINDS 20 TO 30 KNOTS. ISOLATED SHOWERS.
WAVES SUBSIDING TO 3 TO 5 FEET.
.TUESDAY...NORTHWEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS BY MID AFTERNOON. ISOLATED SHOWERS THROUGH EARLY
AFTERNOON. WAVES SUBSIDING TO 1 TO 3 FEET.
.TUESDAY NIGHT...NORTH WINDS 5 TO 15 KNOTS BACKING NORTHWEST
AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.WEDNESDAY...NORTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST BY
MID AFTERNOON. WAVES CALM TO 2 FEET.
.WEDNESDAY NIGHT...SOUTHWEST WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
.THURSDAY...SOUTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTH BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
.THURSDAY NIGHT...SOUTHWEST WINDS 5 TO 15 KNOTS. A CHANCE OF
SHOWERS AND THUNDERSTORMS. WAVES CALM TO 2 FEET.
.FRIDAY...SOUTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTH. A CHANCE
OF SHOWERS AND THUNDERSTORMS. WAVES CALM TO 2 FEET.
.SATURDAY...SOUTH WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.

$$

LSZ263-250415-
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-
403 PM EDT MON AUG 24 2015

.LATE THIS AFTERNOON...NORTHWEST WINDS 20 TO 30 KNOTS WITH A FEW
GALE FORCE GUSTS TO 35 KNOTS. NUMEROUS SHOWERS. WAVES 5 TO 8 FEET.
.TONIGHT...NORTHWEST WINDS 20 TO 30 KNOTS...WITH A FEW GALE FORCE
GUSTS TO 35 KNOTS THROUGH MIDNIGHT. SCATTERED SHOWERS. WAVES
SUBSIDING TO 3 TO 6 FEET.
.TUESDAY...NORTHWEST WINDS 20 TO 30 KNOTS. ISOLATED SHOWERS.
WAVES 3 TO 5 FEET.
.TUESDAY NIGHT...NORTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF SHOWERS THROUGH
MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET.
.WEDNESDAY...NORTHWEST WINDS 5 TO 15 KNOTS BACKING WEST BY MID
AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.WEDNESDAY NIGHT...SOUTHWEST WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
.THURSDAY...SOUTHWEST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
.THURSDAY NIGHT...SOUTHWEST WINDS 5 TO 15 KNOTS INCREASING TO
10 TO 20 KNOTS AFTER MIDNIGHT. A CHANCE OF SHOWERS AND
THUNDERSTORMS. WAVES CALM TO 2 FEET.
.FRIDAY...SOUTHWEST WINDS 10 TO 20 KNOTS BECOMING SOUTH 5 TO
15 KNOTS. A CHANCE OF SHOWERS AND THUNDERSTORMS. WAVES CALM TO
2 FEET.
.SATURDAY...SOUTH WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.

$$

LSZ264-250415-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
403 PM EDT MON AUG 24 2015

.LATE THIS AFTERNOON...NORTHWEST WINDS 20 TO 30 KNOTS WITH A FEW
GALES FORCE GUSTS TO 35 KNOTS. SHOWERS. WAVES 3 TO 6 FEET BUILDING
TO 4 TO 7 FEET.
.TONIGHT...NORTHWEST WINDS 20 TO 30 KNOTS WITH A FEW GALE FORCE
GUSTS TO 35 KNOTS. NUMEROUS SHOWERS THROUGH MIDNIGHT...THEN
SCATTERED SHOWERS. WAVES 4 TO 7 FEET.
.TUESDAY...NORTHWEST WINDS 20 TO 30 KNOTS WITH A FEW GALE FORCE
GUSTS TO 35 KNOTS. SCATTERED SHOWERS. WAVES SUBSIDING TO 3 TO 6
FEET.
.TUESDAY NIGHT...NORTH WINDS 20 TO 30 KNOTS BECOMING NORTHWEST
15 TO 25 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF SHOWERS. WAVES
SUBSIDING TO 2 TO 4 FEET.
.WEDNESDAY...NORTHWEST WINDS 10 TO 20 KNOTS BACKING WEST BY MID
AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.WEDNESDAY NIGHT...WEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.THURSDAY...SOUTHWEST WINDS 10 TO 20 KNOTS BECOMING SOUTH 5 TO
15 KNOTS BY MID AFTERNOON. WAVES CALM TO 2 FEET.
.THURSDAY NIGHT...SOUTH WINDS 5 TO 15 KNOTS BECOMING SOUTHWEST
10 TO 20 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.FRIDAY...SOUTHWEST WINDS 10 TO 20 KNOTS. A CHANCE OF SHOWERS AND
THUNDERSTORMS. WAVES CALM TO 2 FEET.
.SATURDAY...SOUTH WINDS 5 TO 15 KNOTS VEERING SOUTHWEST. WAVES
CALM TO 2 FEET.

$$

LSZ265-250415-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
403 PM EDT MON AUG 24 2015

.LATE THIS AFTERNOON...WEST WINDS 20 TO 30 KNOTS WITH A FEW GALE
FORCE GUSTS TO 35 KNOTS. NUMEROUS SHOWERS. WAVES 3 TO 6 FEET
BUILDING TO 4 TO 7 FEET.
.TONIGHT...NORTHWEST WINDS 20 TO 30 KNOTS WITH A FEW GALE FORCE
GUSTS TO 35 KNOTS. NUMEROUS SHOWERS. WAVES SUBSIDING TO 3 TO 6 FEET.
.TUESDAY...NORTHWEST WINDS 20 TO 30 KNOTS. SCATTERED SHOWERS.
WAVES BUILDING TO 4 TO 7 FEET...THEN SUBSIDING TO 3 TO 6 FEET.
.TUESDAY NIGHT...NORTHWEST WINDS 15 TO 25 KNOTS. A SLIGHT CHANCE
OF SHOWERS. WAVES SUBSIDING TO 2 TO 4 FEET.
.WEDNESDAY...NORTHWEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.WEDNESDAY NIGHT...NORTHWEST WINDS 5 TO 15 KNOTS BACKING
SOUTHWEST AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.THURSDAY...SOUTH WINDS 5 TO 15 KNOTS BACKING SOUTHEAST BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
.THURSDAY NIGHT...SOUTH WINDS 5 TO 15 KNOTS BECOMING SOUTHWEST
10 TO 20 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.FRIDAY...SOUTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTH. A CHANCE
OF SHOWERS AND THUNDERSTORMS. WAVES CALM TO 2 FEET.
.SATURDAY...SOUTH WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS. WAVES CALM TO 2 FEET.

$$

LSZ266-250415-
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-
403 PM EDT MON AUG 24 2015

.LATE THIS AFTERNOON...WEST WINDS 20 TO 30 KNOTS WITH A FEW GALE
FORCE GUSTS TO 35 KNOTS. SHOWERS. WAVES 4 TO 8 FEET.
.TONIGHT...NORTHWEST WINDS 20 TO 30 KNOTS WITH A FEW GALE FORCE
GUSTS TO 35 KNOTS. SHOWERS. WAVES 4 TO 8 FEET.
.TUESDAY...NORTHWEST WINDS 20 TO 30 KNOTS...WITH A FEW GALES FORCE
GUSTS TO 35 KNOTS THROUGH MID AFTERNOON. SCATTERED SHOWERS. WAVES 4
TO 7 FEET.
.TUESDAY NIGHT...NORTHWEST WINDS 20 TO 30 KNOTS. A SLIGHT CHANCE
OF SHOWERS. WAVES SUBSIDING TO 3 TO 5 FEET.
.WEDNESDAY...NORTHWEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO 1 TO 3 FEET.
.WEDNESDAY NIGHT...NORTHWEST WINDS 5 TO 15 KNOTS BACKING WEST
AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.THURSDAY...SOUTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTH BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
.THURSDAY NIGHT...SOUTH WINDS 10 TO 20 KNOTS VEERING SOUTHWEST
AFTER MIDNIGHT. WAVES BUILDING TO 1 TO 3 FEET...THEN SUBSIDING TO
CALM TO 2 FEET.
.FRIDAY...SOUTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTH. A CHANCE
OF SHOWERS AND THUNDERSTORMS. WAVES CALM TO 2 FEET.
.SATURDAY...SOUTH WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.

$$

LSZ267-250415-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
403 PM EDT MON AUG 24 2015

.LATE THIS AFTERNOON...WEST WINDS 20 TO 30 KNOTS. A SLIGHT CHANCE
OF WATERSPOUTS. SHOWERS. WAVES 3 TO 6 FEET BUILDING TO 4 TO
7 FEET.
.TONIGHT...WEST WINDS 20 TO 30 KNOTS WITH A FEW GALE FORCE GUSTS TO
35 KNOTS VEERING NORTHWEST AFTER MIDNIGHT. SHOWERS. WAVES 4 TO 8
FEET.
.TUESDAY...NORTHWEST WINDS 20 TO 30 KNOTS WITH A FEW GALE FORCE GUSTS
TO 35 KNOTS. SCATTERED SHOWERS. WAVES 4 TO 7 FEET.
.TUESDAY NIGHT...NORTHWEST WINDS 20 TO 30 KNOTS. A SLIGHT CHANCE
OF SHOWERS. WAVES SUBSIDING TO 3 TO 5 FEET.
.WEDNESDAY...NORTHWEST WINDS 15 TO 25 KNOTS. A SLIGHT CHANCE OF
SHOWERS THROUGH EARLY AFTERNOON. WAVES SUBSIDING TO 1 TO 3 FEET.
.WEDNESDAY NIGHT...NORTHWEST WINDS 10 TO 20 KNOTS DIMINISHING TO
5 TO 15 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.THURSDAY...SOUTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTH BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
.THURSDAY NIGHT...SOUTH WINDS 5 TO 15 KNOTS BECOMING SOUTHWEST
10 TO 20 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.FRIDAY...SOUTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTH. A CHANCE
OF SHOWERS AND THUNDERSTORMS. WAVES CALM TO 2 FEET.
.SATURDAY...SOUTHEAST WINDS 5 TO 15 KNOTS VEERING SOUTH. WAVES
CALM TO 2 FEET.

$$

LSZ261-250415-
MAFOR 2421/
SUPERIOR WEST 14740 14730. SCATTERED SHOWERS THIS EVENING. WAVES
3 TO 7 FEET TONIGHT SUBSIDING TO 2 TO 5 FEET TUESDAY.

SUPERIOR NORTH CENTRAL 12746 15740. SCATTERED SHOWERS OVERNIGHT
THROUGH LATE TUESDAY MORNING. WAVES 4 TO 7 FEET.

SUPERIOR SOUTH CENTRAL 11646 14746 11746 11740 11740. SCATTERED
SHOWERS LATE TUESDAY. WAVES 5 TO 8 FEET.

SUPERIOR EAST 12646 13746 13740. SLIGHT CHANCE OF WATERSPOUTS
THIS EVENING. SCATTERED SHOWERS EARLY TUESDAY AFTERNOON. WAVES 5
TO 8 FEET.

$$

JS



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