Great Lakes Forecast
Issued by NWS

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000
FZUS63 KMQT 010756
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
356 AM EDT TUE SEP 1 2015

FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE SUPERIOR

.SYNOPSIS...A 30.0 INCH RIDGE WILL REMAIN OVER THE LOWER GREAT LAKES
THROUGH THURSDAY AS A HIGH STRETCHES WESTWARD FROM THE CENTRAL
APPALACHIANS. THIS HIGH WILL BE REPLACED BY STRONGER 30.3 INCH HIGH
PRESSURE OVER NEW ENGLAND BY FRIDAY. MEANWHILE...A 29.4 INCH LOW
PRESSURE OVER FAR NORTHERN ONTARIO WILL STRENGTHEN TO 29.2 INCHES AS
IT MOVES ACROSS SOUTHERN HUDSON BAY THIS MORNING. THIS WILL SHIFT A
WEAKENING TROUGH AVERAGING 29.9 INCHES ACROSS LAKE SUPERIOR TODAY AND
TONIGHT. A 30.0 INCH RIDGE WILL BRIEFLY BUILD ACROSS ALL OF LAKE
SUPERIOR WEDNESDAY. LOOK FOR A BROAD 29.6 INCH LOW PRESSURE SYSTEM
ACROSS SOUTH CENTRAL CANADA AND THE CENTRAL PLAINS ON THURSDAY TO
REMAIN NEARLY STATIONARY THROUGH FRIDAY BEFORE DRIFTING EASTWARD TO
THE UPPER MISSISSIPPI VALLEY BY LATE THIS WEEKEND.

LSZ162-011600-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
356 AM EDT TUE SEP 1 2015 /256 AM CDT TUE SEP 1 2015/

.EARLY THIS MORNING...SOUTHWEST WINDS 5 TO 15 KNOTS. PATCHY FOG.
A SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS. WAVES CALM TO
2 FEET.
.TODAY...SOUTHWEST WINDS 5 TO 15 KNOTS. PATCHY FOG. WAVES CALM TO
2 FEET.
.TONIGHT...SOUTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTH AFTER
MIDNIGHT. PATCHY FOG. WAVES CALM TO 2 FEET.
.WEDNESDAY...EAST WINDS 5 TO 15 KNOTS. PATCHY FOG. A SLIGHT
CHANCE OF SHOWERS AND THUNDERSTORMS BY MID AFTERNOON. WAVES CALM
TO 2 FEET.
.WEDNESDAY NIGHT...EAST WINDS 5 TO 15 KNOTS. A SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS. WAVES CALM TO 2 FEET.
.THURSDAY...EAST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
.THURSDAY NIGHT...EAST WINDS 10 TO 20 KNOTS BECOMING SOUTHEAST
5 TO 15 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.FRIDAY...SOUTHEAST WINDS 5 TO 15 KNOTS VEERING SOUTH. A CHANCE
OF SHOWERS AND THUNDERSTORMS. WAVES CALM TO 2 FEET.
.SATURDAY...SOUTH WINDS 5 TO 15 KNOTS. A CHANCE OF SHOWERS AND
THUNDERSTORMS. WAVES CALM TO 2 FEET.

$$

LSZ263-011600-
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-
356 AM EDT TUE SEP 1 2015

.EARLY THIS MORNING...SOUTHWEST WINDS 10 TO 20 KNOTS. PATCHY FOG.
WAVES 1 TO 3 FEET.
.TODAY...SOUTHWEST WINDS 10 TO 20 KNOTS BECOMING WEST 5 TO
15 KNOTS BY MID AFTERNOON. PATCHY FOG. WAVES SUBSIDING TO CALM TO
2 FEET.
.TONIGHT...SOUTHWEST WINDS 5 TO 15 KNOTS. PATCHY FOG. WAVES CALM
TO 2 FEET.
.WEDNESDAY...SOUTHEAST WINDS LESS THAN 10 KNOTS BECOMING EAST
5 TO 15 KNOTS BY MID AFTERNOON. AREAS OF FOG. A SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS BY MID AFTERNOON. WAVES CALM TO 2 FEET.
.WEDNESDAY NIGHT...EAST WINDS 5 TO 15 KNOTS VEERING SOUTHEAST
AFTER MIDNIGHT. A SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS
THROUGH MIDNIGHT. WAVES CALM TO 2 FEET.
.THURSDAY...EAST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
.THURSDAY NIGHT...SOUTHEAST WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
.FRIDAY...SOUTHEAST WINDS 5 TO 15 KNOTS VEERING SOUTH. WAVES CALM
TO 2 FEET.
.SATURDAY...SOUTH WINDS 10 TO 20 KNOTS. A CHANCE OF SHOWERS AND
THUNDERSTORMS. WAVES CALM TO 2 FEET.

$$

LSZ264-011600-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
356 AM EDT TUE SEP 1 2015

.EARLY THIS MORNING...SOUTHWEST WINDS 10 TO 20 KNOTS. AREAS OF
FOG. WAVES 1 TO 3 FEET.
.TODAY...SOUTHWEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS BY MID AFTERNOON. A SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS THROUGH EARLY AFTERNOON. PATCHY FOG. WAVES
SUBSIDING TO CALM TO 2 FEET.
.TONIGHT...SOUTHWEST WINDS 5 TO 15 KNOTS VEERING WEST AFTER
MIDNIGHT. AREAS OF FOG. WAVES CALM TO 2 FEET.
.WEDNESDAY...EAST WINDS 5 TO 15 KNOTS VEERING SOUTHEAST BY MID
AFTERNOON. AREAS OF FOG. WAVES CALM TO 2 FEET.
.WEDNESDAY NIGHT...SOUTHEAST WINDS 5 TO 15 KNOTS INCREASING TO
10 TO 20 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS THROUGH MIDNIGHT. PATCHY FOG. WAVES CALM TO 2 FEET.
.THURSDAY...SOUTHEAST WINDS 5 TO 15 KNOTS. PATCHY FOG THROUGH
EARLY AFTERNOON. WAVES BUILDING TO 1 TO 3 FEET...THEN SUBSIDING
TO CALM TO 2 FEET.
.THURSDAY NIGHT...SOUTHEAST WINDS 10 TO 20 KNOTS. WAVES CALM TO
2 FEET.
.FRIDAY...SOUTHEAST WINDS 5 TO 15 KNOTS BECOMING SOUTH 10 TO
20 KNOTS. WAVES BUILDING TO 1 TO 3 FEET...THEN SUBSIDING TO CALM
TO 2 FEET.
.SATURDAY...SOUTH WINDS 10 TO 20 KNOTS. A CHANCE OF SHOWERS AND
THUNDERSTORMS. WAVES BUILDING TO 1 TO 3 FEET.

$$

LSZ265-011600-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
356 AM EDT TUE SEP 1 2015

.EARLY THIS MORNING...SOUTHWEST WINDS 10 TO 20 KNOTS. WAVES CALM
TO 2 FEET.
.TODAY...SOUTHWEST WINDS 5 TO 15 KNOTS VEERING WEST BY MID
AFTERNOON. A SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
.TONIGHT...SOUTHWEST WINDS LESS THAN 10 KNOTS BECOMING WEST 5 TO
15 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS THROUGH MIDNIGHT. PATCHY FOG. WAVES CALM TO 2 FEET.
.WEDNESDAY...NORTH WINDS 5 TO 15 KNOTS VEERING EAST BY MID
AFTERNOON. PATCHY FOG. WAVES CALM TO 2 FEET.
.WEDNESDAY NIGHT...SOUTHEAST WINDS 5 TO 15 KNOTS. A SLIGHT CHANCE
OF SHOWERS AND THUNDERSTORMS THROUGH MIDNIGHT. WAVES CALM TO
2 FEET.
.THURSDAY...SOUTHEAST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS BY MID AFTERNOON. WAVES CALM TO 2 FEET.
.THURSDAY NIGHT...SOUTHEAST WINDS 10 TO 20 KNOTS. WAVES CALM TO
2 FEET.
.FRIDAY...SOUTHEAST WINDS 10 TO 20 KNOTS VEERING SOUTH. WAVES
BUILDING TO 1 TO 3 FEET...THEN SUBSIDING TO CALM TO 2 FEET.
.SATURDAY...SOUTH WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS. A CHANCE OF SHOWERS AND THUNDERSTORMS. WAVES BUILDING
TO 1 TO 3 FEET...THEN SUBSIDING TO CALM TO 2 FEET.

$$

LSZ266-011600-
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-
356 AM EDT TUE SEP 1 2015

.EARLY THIS MORNING...SOUTHWEST WINDS 10 TO 20 KNOTS. PATCHY FOG.
WAVES 1 TO 3 FEET.
.TODAY...SOUTHWEST WINDS 10 TO 20 KNOTS BECOMING SOUTH 5 TO
15 KNOTS BY MID AFTERNOON. PATCHY FOG. A SLIGHT CHANCE OF SHOWERS
AND THUNDERSTORMS BY MID AFTERNOON. WAVES SUBSIDING TO CALM TO
2 FEET.
.TONIGHT...NORTHEAST WINDS 5 TO 15 KNOTS BACKING WEST AFTER
MIDNIGHT. A SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS THROUGH
MIDNIGHT. AREAS OF FOG. WAVES CALM TO 2 FEET.
.WEDNESDAY...NORTHWEST WINDS 5 TO 15 KNOTS VEERING NORTH BY MID
AFTERNOON. AREAS OF FOG. WAVES CALM TO 2 FEET.
.WEDNESDAY NIGHT...EAST WINDS 5 TO 15 KNOTS VEERING SOUTHEAST
AFTER MIDNIGHT. AREAS OF FOG. WAVES CALM TO 2 FEET.
.THURSDAY...SOUTHEAST WINDS 5 TO 15 KNOTS. PATCHY FOG THROUGH
EARLY AFTERNOON. WAVES CALM TO 2 FEET.
.THURSDAY NIGHT...SOUTHEAST WINDS 10 TO 20 KNOTS. WAVES BUILDING
TO 1 TO 3 FEET.
.FRIDAY...SOUTHEAST WINDS 10 TO 20 KNOTS VEERING SOUTH. WAVES
BUILDING TO 2 TO 4 FEET...THEN SUBSIDING TO 1 TO 3 FEET.
.SATURDAY...SOUTH WINDS 10 TO 20 KNOTS. A CHANCE OF SHOWERS AND
THUNDERSTORMS. WAVES BUILDING TO 2 TO 4 FEET...THEN SUBSIDING TO
1 TO 3 FEET.

$$

LSZ267-011600-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
356 AM EDT TUE SEP 1 2015

.EARLY THIS MORNING...SOUTHWEST WINDS 10 TO 20 KNOTS. AREAS OF
FOG. WAVES 1 TO 3 FEET.
.TODAY...SOUTH WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO 15 KNOTS
BY MID AFTERNOON. PATCHY FOG. A SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS BY MID AFTERNOON. WAVES SUBSIDING TO CALM TO
2 FEET.
.TONIGHT...SOUTH WINDS 5 TO 15 KNOTS VEERING NORTHWEST AFTER
MIDNIGHT. AREAS OF FOG. A SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. WAVES CALM TO 2 FEET.
.WEDNESDAY...NORTHWEST WINDS 5 TO 15 KNOTS. AREAS OF FOG. WAVES
CALM TO 2 FEET.
.WEDNESDAY NIGHT...NORTH WINDS 5 TO 15 KNOTS VEERING EAST AFTER
MIDNIGHT. AREAS OF FOG. WAVES CALM TO 2 FEET.
.THURSDAY...EAST WINDS 5 TO 15 KNOTS. PATCHY FOG THROUGH EARLY
AFTERNOON. WAVES CALM TO 2 FEET.
.THURSDAY NIGHT...SOUTHEAST WINDS 10 TO 20 KNOTS. WAVES CALM TO
2 FEET.
.FRIDAY...SOUTHEAST WINDS 10 TO 20 KNOTS. WAVES CALM TO 2 FEET.
.SATURDAY...SOUTH WINDS 10 TO 20 KNOTS. WAVES BUILDING TO 1 TO
3 FEET.

$$

LSZ261-011600-
MAFOR 0109/
SUPERIOR WEST 11520 14510 13500. PATCHY FOG. WAVES 2 FEET OR LESS.

SUPERIOR NORTH CENTRAL 11523 14510 12500 11600. PATCHY FOG. WAVES 1
TO 3 FEET.

SUPERIOR SOUTH CENTRAL 13510 11400 12100 11500 11600. PATCHY FOG.
WAVES 2 FEET OR LESS.

SUPERIOR EAST 12523 11513 11410 11300 11200 11100 11703. PATCHY.
WAVES 1 TO 3 FEET TODAY. WAVES 2 FEET OR LESS TONIGHT.

$$

SRF


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