Great Lakes Forecast
Issued by NWS

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000
FZUS63 KMQT 221353
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
953 AM EDT SAT AUG 22 2015

FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE SUPERIOR

.SYNOPSIS...AS A 30.2 INCH HIGH PRESSURE CENTERED NEAR LAKE ONTARIO
THIS MORNING MOVES INTO THE CANADIAN MARITIMES ON SUNDAY...A 29.4
INCH LOW PRESSURE IN THE NORTHERN PLAINS WILL MOVE INTO FAR NORTHWEST
ONTARIO AND DRAG A COLD FRONT ACROSS LAKE SUPERIOR LATE TONIGHT INTO
SUNDAY. EXPECT THIS LOW TO MEANDER SLOWLY EAST ACROSS ONTARIO TO
NEAR JAMES BAY BY LATE TUESDAY WHILE WEAKENING TO 29.7 INCHES. A
TRAILING 30.2 INCH HIGH PRESSURE RIDGE OVER THE PLAINS ON MONDAY WILL
THEN DRIFT EAST THROUGH THE UPPER MISSISSIPPI RIVER VALLEY INTO THE
WESTERN GREAT LAKES ON WEDNESDAY AS THE CANADIAN LOW EXITS THROUGH
QUEBEC.

LSZ162-222200-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
953 AM EDT SAT AUG 22 2015 /853 AM CDT SAT AUG 22 2015/

.REST OF TODAY...SOUTH WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS BY MID AFTERNOON. A SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS BY MID AFTERNOON. WAVES 1 TO 3 FEET SUBSIDING TO
CALM TO 2 FEET...THEN BUILDING TO 1 TO 3 FEET.
.TONIGHT...SOUTH WINDS 15 TO 25 KNOTS. A CHANCE OF SHOWERS
THROUGH MIDNIGHT. A CHANCE OF THUNDERSTORMS. SHOWERS LIKELY AFTER
MIDNIGHT. WAVES BUILDING TO 2 TO 4 FEET.
.SUNDAY...SOUTHWEST WINDS 20 TO 30 KNOTS VEERING WEST BY MID
AFTERNOON. A FEW GALE FORCE GUSTS TO 35 KNOTS IN THE AFTERNOON. A
SLIGHT CHANCE OF SHOWERS. WAVES BUILDING TO 4 TO 7 FEET...THEN
SUBSIDING TO 3 TO 6 FEET.
.SUNDAY NIGHT...WEST WINDS 20 TO 30 KNOTS...WITH A FEW GALE FORCE
GUSTS TO 35 KNOTS. A CHANCE OF SHOWERS. WAVES 3 TO 6 FEET.
.MONDAY...WEST WINDS 20 TO 30 KNOTS VEERING NORTHWEST BY MID
AFTERNOON. A CHANCE OF SHOWERS. WAVES SUBSIDING TO 2 TO 4 FEET.
.MONDAY NIGHT...NORTHWEST WINDS 15 TO 25 KNOTS. WAVES SUBSIDING
TO 1 TO 3 FEET.
.TUESDAY...NORTHWEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS. WAVES SUBSIDING TO CALM TO 2 FEET.
.WEDNESDAY...WEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST. WAVES
CALM TO 2 FEET.

$$

LSZ263-222200-
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-
953 AM EDT SAT AUG 22 2015

...GALE WATCH IN EFFECT FROM SUNDAY AFTERNOON THROUGH MONDAY
MORNING...

.REST OF TODAY...SOUTH WINDS 15 TO 25 KNOTS. WAVES 2 TO 4 FEET.
.TONIGHT...SOUTH WINDS 20 TO 30 KNOTS. A SLIGHT CHANCE OF SHOWERS
THROUGH MIDNIGHT. SHOWERS LIKELY AFTER MIDNIGHT. A CHANCE OF
THUNDERSTORMS...MAINLY AFTER MIDNIGHT. WAVES BUILDING TO 3 TO 6
FEET.
.SUNDAY...SOUTHWEST WINDS 20 TO 30 KNOTS INCREASING TO GALES TO
35 KNOTS BY MID AFTERNOON. A SLIGHT CHANCE OF THUNDERSTORMS
THROUGH EARLY AFTERNOON. A SLIGHT CHANCE OF SHOWERS. WAVES
SUBSIDING TO 3 TO 5 FEET...THEN BUILDING TO 5 TO 8 FEET.
.SUNDAY NIGHT...WEST GALES TO 35 KNOTS DIMINISHING TO 20 TO
30 KNOTS AFTER MIDNIGHT. A CHANCE OF SHOWERS. WAVES BUILDING TO
6 TO 9 FEET...THEN SUBSIDING TO 4 TO 7 FEET.
.MONDAY...WEST WINDS 20 TO 30 KNOTS VEERING NORTHWEST BY MID
AFTERNOON. A CHANCE OF SHOWERS. WAVES SUBSIDING TO 3 TO 5 FEET.
.MONDAY NIGHT...NORTHWEST WINDS 15 TO 25 KNOTS. A CHANCE OF
SHOWERS. WAVES SUBSIDING TO 2 TO 4 FEET.
.TUESDAY...NORTHWEST WINDS 10 TO 20 KNOTS. WAVES SUBSIDING TO
CALM TO 2 FEET.
.WEDNESDAY...WEST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.

$$

LSZ264-222200-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
953 AM EDT SAT AUG 22 2015

...GALE WATCH IN EFFECT FROM SUNDAY AFTERNOON THROUGH MONDAY
MORNING...

.REST OF TODAY...SOUTH WINDS 15 TO 25 KNOTS BACKING SOUTHEAST BY
MID AFTERNOON. WAVES 2 TO 4 FEET BUILDING TO 3 TO 5 FEET.
.TONIGHT...SOUTH WINDS 20 TO 30 KNOTS. A CHANCE OF SHOWERS AND
THUNDERSTORMS. WAVES BUILDING TO 4 TO 7 FEET.
.SUNDAY...SOUTH WINDS 15 TO 25 KNOTS BECOMING SOUTHWEST 20 TO
30 KNOTS BY MID AFTERNOON. GALE FORCE GUSTS TO 35 KNOTS IN THE
AFTERNOON. SHOWERS AND A CHANCE OF THUNDERSTORMS THROUGH EARLY
AFTERNOON...THEN A SLIGHT CHANCE OF SHOWERS BY MID AFTERNOON. WAVES
BUILDING TO 5 TO 8 FEET.
.SUNDAY NIGHT...WEST WINDS 20 TO 30 KNOTS...WITH GALE FORCE GUSTS TO
35 KNOTS. A CHANCE OF SHOWERS. WAVES SUBSIDING TO 4 TO 7 FEET.
.MONDAY...WEST WINDS 15 TO 25 KNOTS VEERING NORTHWEST BY MID
AFTERNOON. SHOWERS LIKELY THROUGH EARLY AFTERNOON...THEN A CHANCE
OF SHOWERS BY MID AFTERNOON. WAVES SUBSIDING TO 3 TO 5 FEET.
.MONDAY NIGHT...NORTHWEST WINDS 15 TO 25 KNOTS INCREASING TO
20 TO 30 KNOTS AFTER MIDNIGHT. A CHANCE OF SHOWERS. WAVES
SUBSIDING TO 2 TO 4 FEET...THEN BUILDING TO 3 TO 5 FEET.
.TUESDAY...NORTHWEST WINDS 15 TO 25 KNOTS. WAVES SUBSIDING TO
CALM TO 2 FEET.
.WEDNESDAY...WEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS. WAVES CALM TO 2 FEET.

$$

LSZ265-222200-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
953 AM EDT SAT AUG 22 2015

.REST OF TODAY...SOUTH WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS BY MID AFTERNOON. WAVES 1 TO 3 FEET BUILDING TO 2 TO
4 FEET.
.TONIGHT...SOUTH WINDS 20 TO 30 KNOTS. A CHANCE OF SHOWERS AND
THUNDERSTORMS AFTER MIDNIGHT. WAVES BUILDING TO 3 TO 6 FEET.
.SUNDAY...SOUTH WINDS 20 TO 30 KNOTS BECOMING WEST 15 TO 25 KNOTS
BY MID AFTERNOON. SHOWERS AND A CHANCE OF THUNDERSTORMS THROUGH
EARLY AFTERNOON...THEN A SLIGHT CHANCE OF SHOWERS BY MID
AFTERNOON. WAVES SUBSIDING TO 2 TO 4 FEET.
.SUNDAY NIGHT...WEST WINDS 20 TO 30 KNOTS. A CHANCE OF SHOWERS
THROUGH MIDNIGHT...THEN SHOWERS LIKELY AFTER MIDNIGHT. WAVES
BUILDING TO 3 TO 5 FEET...THEN SUBSIDING TO 2 TO 4 FEET.
.MONDAY...WEST WINDS 20 TO 30 KNOTS. A CHANCE OF SHOWERS. WAVES
2 TO 4 FEET.
.MONDAY NIGHT...NORTHWEST WINDS 15 TO 25 KNOTS. A CHANCE OF
SHOWERS. WAVES 2 TO 4 FEET.
.TUESDAY...NORTHWEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS. A CHANCE OF SHOWERS. WAVES SUBSIDING TO CALM TO 2 FEET.
.WEDNESDAY...NORTHWEST WINDS 10 TO 20 KNOTS BACKING WEST. WAVES
CALM TO 2 FEET.

$$

LSZ266-222200-
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-
953 AM EDT SAT AUG 22 2015

.REST OF TODAY...SOUTH WINDS 15 TO 25 KNOTS INCREASING TO 20 TO
30 KNOTS BY MID AFTERNOON. WAVES 2 TO 4 FEET BUILDING TO 3 TO
5 FEET.
.TONIGHT...SOUTH WINDS 20 TO 30 KNOTS. A SLIGHT CHANCE OF SHOWERS
AND THUNDERSTORMS AFTER MIDNIGHT. WAVES BUILDING TO 4 TO 7 FEET.
.SUNDAY...SOUTH WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS BY MID AFTERNOON. SHOWERS THROUGH EARLY AFTERNOON. A
CHANCE OF THUNDERSTORMS. A CHANCE OF SHOWERS BY MID AFTERNOON.
WAVES SUBSIDING TO 3 TO 5 FEET.
.SUNDAY NIGHT...WEST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO
30 KNOTS AFTER MIDNIGHT. A CHANCE OF SHOWERS. WAVES BUILDING TO
4 TO 7 FEET...THEN SUBSIDING TO 3 TO 6 FEET.
.MONDAY...WEST WINDS 15 TO 25 KNOTS. A CHANCE OF SHOWERS. WAVES
SUBSIDING TO 2 TO 4 FEET.
.MONDAY NIGHT...NORTHWEST WINDS 10 TO 20 KNOTS INCREASING TO
15 TO 25 KNOTS AFTER MIDNIGHT. A CHANCE OF SHOWERS. WAVES
BUILDING TO 3 TO 6 FEET.
.TUESDAY...NORTHWEST WINDS 15 TO 25 KNOTS. A CHANCE OF SHOWERS.
WAVES SUBSIDING TO 1 TO 3 FEET LATE.
.WEDNESDAY...NORTHWEST WINDS 10 TO 20 KNOTS BECOMING WEST 5 TO
15 KNOTS. WAVES SUBSIDING TO CALM TO 2 FEET.

$$

LSZ267-222200-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
953 AM EDT SAT AUG 22 2015

.REST OF TODAY...SOUTH WINDS 15 TO 25 KNOTS. WAVES 2 TO 4 FEET
SUBSIDING TO 1 TO 3 FEET...THEN BUILDING TO 2 TO 4 FEET.
.TONIGHT...SOUTH WINDS 15 TO 25 KNOTS. WAVES BUILDING TO 3 TO
5 FEET...THEN SUBSIDING TO 2 TO 4 FEET.
.SUNDAY...SOUTHEAST WINDS 20 TO 30 KNOTS BECOMING SOUTH 15 TO
25 KNOTS BY MID AFTERNOON. A CHANCE OF SHOWERS THROUGH EARLY
AFTERNOON. A CHANCE OF THUNDERSTORMS. SHOWERS BY MID AFTERNOON.
WAVES BUILDING TO 3 TO 5 FEET...THEN SUBSIDING TO 1 TO 3 FEET.
.SUNDAY NIGHT...SOUTHWEST WINDS 10 TO 20 KNOTS BECOMING WEST
15 TO 25 KNOTS AFTER MIDNIGHT. A CHANCE OF SHOWERS. WAVES
BUILDING TO 2 TO 4 FEET.
.MONDAY...WEST WINDS 15 TO 25 KNOTS. A CHANCE OF SHOWERS. WAVES
2 TO 4 FEET.
.MONDAY NIGHT...WEST WINDS 10 TO 20 KNOTS VEERING NORTHWEST AFTER
MIDNIGHT. A CHANCE OF SHOWERS. WAVES SUBSIDING TO 1 TO 3 FEET...
THEN BUILDING TO 3 TO 5 FEET.
.TUESDAY...NORTHWEST WINDS 15 TO 25 KNOTS. A CHANCE OF SHOWERS.
WAVES SUBSIDING TO 1 TO 3 FEET.
.WEDNESDAY...NORTHWEST WINDS 10 TO 20 KNOTS BECOMING WEST 5 TO
15 KNOTS. WAVES SUBSIDING TO CALM TO 2 FEET.

$$
LSZ261-222200-
MAFOR 2215/
SUPERIOR WEST 11420 11320 13430 12436 11530. A CHANCE OF
THUNDERSTORMS LATE TONIGHT INTO SUNDAY MORNING. WAVES 2 TO 4 FEET
BUILDING TO 3 TO 5 FEET TONIGHT AND SUNDAY MORNING.

SUPERIOR NORTH CENTRAL 11420 12330 12430 12440 11446. A CHANCE OF
THUNDERSTORMS LATE TONIGHT INTO SUNDAY MORNING. WAVES 2 TO 4 FEET
THIS AFTERNOON BUILDING TO 4 TO 7 FEET TONIGHT AND SUNDAY MORNING.

SUPERIOR SOUTH CENTRAL 11420 11430 14440 12446. CHANCE OF
THUNDERSTORMS LATE TONIGHT INTO SUNDAY MORNING. WAVES 1 TO 3 FEET
BUILDING TO 2 TO 4 FEET THIS AFTERNOON. WAVES 3 TO 6 FEET TONIGHT AND
SUNDAY MORNING.

SUPERIOR EAST 11420 14430 11430 12330. WAVES 2 TO 4 FEET THIS
AFTERNOON BUILDING TO 3 TO 6 FEET TONIGHT AND SUNDAY MORNING.

$$

MRD


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