Great Lakes Forecast
Issued by NWS

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000
FZUS63 KMQT 220203
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
1003 PM EDT FRI AUG 21 2015

FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE SUPERIOR

.SYNOPSIS...30.2 INCH HIGH PRESSURE CENTERED OVER LAKE ERIE WILL
MOVE TO NEAR MONTREAL BY LATE SATURDAY NIGHT AS 29.5 INCH LOW
PRESSURE ORGANIZING ACROSS THE NORTHERN HIGH PLAINS MOVES TO
NORTHWEST ONTARIO AND DEEPENS TO 29.3 INCHES. EXPECT THIS LOW TO DRAG
A COLD FRONT ACROSS THE UPPER GREAT LAKES ON LATE SATURDAY NIGHT INTO
SUNDAY AS IT EDGES SLOWLY TO THE EAST. THE LOW WILL CONTINUE TO NEAR
JAMES BAY ON TUESDAY AND WEAKEN TO 29.8 INCHES. A TRAILING 30.2 INCH
HIGH PRESSURE RIDGE IN THE PLAINS ON MONDAY WILL THEN MOVE THROUGH
THE UPPER MISSISSIPPI RIVER VALLEY AND INTO THE WESTERN GREAT LAKES
TUESDAY NIGHT AND WEDNESDAY.

LSZ162-221015-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
1003 PM EDT FRI AUG 21 2015 /903 PM CDT FRI AUG 21 2015/

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

$$

LSZ263-221015-
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-
1003 PM EDT FRI AUG 21 2015

.REST OF TONIGHT...SOUTH WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS AFTER MIDNIGHT. WAVES 1 TO 3 FEET.
.SATURDAY...SOUTH WINDS 15 TO 25 KNOTS. WAVES BUILDING TO 2 TO
4 FEET.
.SATURDAY NIGHT...SOUTH WINDS 15 TO 25 KNOTS. A CHANCE OF SHOWERS
THROUGH MIDNIGHT...THEN SHOWERS LIKELY. A CHANCE OF THUNDERSTORMS.
WAVES BUILDING TO 3 TO 5 FEET.
.SUNDAY...SOUTHWEST WINDS 15 TO 25 KNOTS BECOMING WEST 20 TO
30 KNOTS BY MID AFTERNOON. SHOWERS LIKELY AND A CHANCE OF
THUNDERSTORMS THROUGH EARLY AFTERNOON...THEN A CHANCE OF SHOWERS.
WAVES 3 TO 6 FEET.
.SUNDAY NIGHT...WEST WINDS 20 TO 30 KNOTS. A CHANCE OF SHOWERS.
WAVES BUILDING TO 4 TO 8 FEET.
.MONDAY...WEST GALES TO 35 KNOTS BECOMING NORTHWEST 20 TO
30 KNOTS BY MID AFTERNOON. A CHANCE OF SHOWERS. WAVES SUBSIDING
TO 3 TO 5 FEET.
.MONDAY NIGHT...NORTHWEST WINDS 15 TO 25 KNOTS. WAVES SUBSIDING
TO 2 TO 4 FEET.
.TUESDAY...NORTHWEST WINDS 15 TO 25 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.

$$

LSZ264-221015-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
1003 PM EDT FRI AUG 21 2015

.REST OF TONIGHT...SOUTH WINDS 15 TO 25 KNOTS. WAVES 2 TO 4 FEET.
.SATURDAY...SOUTH WINDS 15 TO 25 KNOTS BACKING SOUTHEAST BY MID
AFTERNOON. WAVES SUBSIDING TO 1 TO 3 FEET...THEN BUILDING TO 3 TO
5 FEET.
.SATURDAY NIGHT...SOUTH WINDS 20 TO 30 KNOTS. A SLIGHT CHANCE OF
SHOWERS THROUGH MIDNIGHT...THEN SHOWERS LIKELY. A CHANCE OF
THUNDERSTORMS. WAVES BUILDING TO 4 TO 7 FEET.
.SUNDAY...SOUTH WINDS 15 TO 25 KNOTS VEERING SOUTHWEST BY MID
AFTERNOON. SHOWERS LIKELY AND A CHANCE OF THUNDERSTORMS THROUGH
EARLY AFTERNOON...THEN A CHANCE OF SHOWERS. WAVES SUBSIDING TO 3 TO
5 FEET.
.SUNDAY NIGHT...WEST WINDS 20 TO 30 KNOTS. A CHANCE OF SHOWERS.
WAVES BUILDING TO 4 TO 7 FEET.
.MONDAY...WEST GALES TO 35 KNOTS BECOMING NORTHWEST 20 TO
30 KNOTS BY MID AFTERNOON. A CHANCE OF SHOWERS. WAVES SUBSIDING
TO 3 TO 5 FEET.
.MONDAY NIGHT...NORTHWEST WINDS 20 TO 30 KNOTS. A CHANCE OF
SHOWERS. WAVES SUBSIDING TO 2 TO 4 FEET.
.TUESDAY...NORTHWEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS. WAVES SUBSIDING TO CALM TO 2 FEET.
.WEDNESDAY...WEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST. WAVES
CALM TO 2 FEET.

$$

LSZ265-221015-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
1003 PM EDT FRI AUG 21 2015

.REST OF TONIGHT...SOUTH WINDS 15 TO 25 KNOTS. WAVES 2 TO 4 FEET
SUBSIDING TO 1 TO 3 FEET.
.SATURDAY...SOUTH WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS BY MID AFTERNOON. WAVES BUILDING TO 2 TO 4 FEET.
.SATURDAY NIGHT...SOUTH WINDS 20 TO 30 KNOTS. A SLIGHT CHANCE OF
SHOWERS THROUGH MIDNIGHT...THEN SHOWERS LIKELY. A CHANCE OF
THUNDERSTORMS. WAVES BUILDING TO 3 TO 6 FEET.
.SUNDAY...SOUTH WINDS 15 TO 25 KNOTS BECOMING SOUTHWEST 10 TO
20 KNOTS BY MID AFTERNOON. SHOWERS LIKELY AND A CHANCE OF
THUNDERSTORMS THROUGH EARLY AFTERNOON...THEN A SLIGHT CHANCE OF
SHOWERS. WAVES SUBSIDING TO 1 TO 3 FEET.
.SUNDAY NIGHT...WEST WINDS 20 TO 30 KNOTS. A CHANCE OF SHOWERS.
WAVES BUILDING TO 3 TO 5 FEET.
.MONDAY...WEST GALES TO 35 KNOTS. A CHANCE OF SHOWERS. WAVES
SUBSIDING TO 2 TO 4 FEET.
.MONDAY NIGHT...NORTHWEST WINDS 20 TO 30 KNOTS. A CHANCE OF
SHOWERS. WAVES BUILDING TO 3 TO 5 FEET...THEN SUBSIDING TO 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 5 TO 15 KNOTS BACKING SOUTHWEST.
WAVES CALM TO 2 FEET.

$$

LSZ266-221015-
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-
1003 PM EDT FRI AUG 21 2015

.REST OF TONIGHT...SOUTH WINDS 20 TO 30 KNOTS DIMINISHING TO
15 TO 25 KNOTS AFTER MIDNIGHT. WAVES 3 TO 5 FEET SUBSIDING TO
2 TO 4 FEET.
.SATURDAY...SOUTH WINDS 15 TO 25 KNOTS. WAVES BUILDING TO 3 TO
5 FEET.
.SATURDAY NIGHT...SOUTH WINDS 20 TO 30 KNOTS. A CHANCE OF SHOWERS
AND THUNDERSTORMS AFTER MIDNIGHT. WAVES BUILDING TO 4 TO 8 FEET.
.SUNDAY...SOUTH WINDS 20 TO 30 KNOTS DIMINISHING TO 10 TO
20 KNOTS BY MID AFTERNOON. SHOWERS LIKELY THROUGH EARLY
AFTERNOON...THEN A CHANCE OF SHOWERS. A CHANCE OF THUNDERSTORMS.
WAVES SUBSIDING TO 2 TO 4 FEET.
.SUNDAY NIGHT...WEST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO
30 KNOTS AFTER MIDNIGHT. A CHANCE OF SHOWERS. WAVES BUILDING TO
3 TO 6 FEET.
.MONDAY...WEST WINDS 20 TO 30 KNOTS. A CHANCE OF SHOWERS. WAVES
3 TO 5 FEET.
.MONDAY NIGHT...NORTHWEST WINDS 20 TO 30 KNOTS. A CHANCE OF
SHOWERS. WAVES 3 TO 6 FEET.
.TUESDAY...NORTHWEST WINDS 15 TO 25 KNOTS. WAVES SUBSIDING TO
1 TO 3 FEET.
.WEDNESDAY...NORTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST.
WAVES SUBSIDING TO CALM TO 2 FEET.

$$

LSZ267-221015-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
1003 PM EDT FRI AUG 21 2015

.REST OF TONIGHT...SOUTH WINDS 15 TO 25 KNOTS. WAVES 1 TO 3 FEET
BUILDING TO 2 TO 4 FEET.
.SATURDAY...SOUTH WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO 1 TO 3 FEET.
.SATURDAY NIGHT...SOUTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS AFTER MIDNIGHT. 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...THEN SHOWERS LIKELY. A CHANCE OF THUNDERSTORMS. WAVES 2
TO 4 FEET.
.SUNDAY NIGHT...SOUTHWEST WINDS 15 TO 25 KNOTS VEERING WEST AFTER
MIDNIGHT. A CHANCE OF SHOWERS. WAVES SUBSIDING TO CALM TO
2 FEET...THEN BUILDING TO 2 TO 4 FEET.
.MONDAY...WEST WINDS 15 TO 25 KNOTS. A CHANCE OF SHOWERS. WAVES
BUILDING TO 3 TO 5 FEET...THEN SUBSIDING TO 2 TO 4 FEET.
.MONDAY NIGHT...WEST WINDS 15 TO 25 KNOTS VEERING NORTHWEST AFTER
MIDNIGHT. A CHANCE OF SHOWERS. WAVES BUILDING TO 3 TO 5 FEET.
.TUESDAY...NORTHWEST WINDS 15 TO 25 KNOTS. 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.

$$
LSZ261-221015-
MAFOR 2203/
SUPERIOR WEST 14420 11420 11320 12430. WAVES 1 TO 4 FEET.

SUPERIOR NORTH CENTRAL 11430 14420 11320 11330 11430. WAVES 2 TO
5 FEET.

SUPERIOR SOUTH CENTRAL 12430 13420 11430 12440. WAVES 1 TO 4 FEET
OVERNIGHT AND SATURDAY. WAVES 3 TO 6 FEET SATURDAY EVENING.

SUPERIOR EAST 12430 14420 12430. WAVES 2 TO 5 FEET.

$$

JS


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