Great Lakes Forecast
Issued by NWS

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000
FZUS63 KMQT 250752
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
352 AM EDT THU AUG 25 2016

FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE SUPERIOR

.SYNOPSIS...A 29.8 INCH LOW PRESSURE TROUGH CURRENTLY EXTENDING FROM
SOUTHERN MANITOBA TO JUST SOUTH OF JAMES BAY WILL DROP SOUTH...
CROSSING LAKE SUPERIOR TONIGHT. IN ITS WAKE...A 30.2 INCH HIGH
PRESSURE WILL BUILD OVER THE WESTERN GREAT LAKES ON FRIDAY. AS THE
HIGH QUICKLY SHIFTS TO SOUTHERN QUEBEC BY SATURDAY MORNING...WEAK
30.0 INCH LOW PRESSURE WILL BEGIN TO TAKE SHAPE OVER THE CENTRAL
PLAINS. THIS LOW WILL TRACK NORTHEAST...REACHING EASTERN UPPER
MICHIGAN LATE SATURDAY NIGHT. AS THE LOW MOVES TO SOUTHERN QUEBEC ON
SUNDAY...30.1 INCH HIGH PRESSURE WILL BUILD INTO THE UPPER GREAT
LAKES. THE HIGH WILL SHIFT TO THE LOWER GREAT LAKES ON MONDAY AS A
29.7 INCH LOW PRESSURE TRACKS EAST TO NORTHERN ONTARIO.

LSZ162-251600-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
352 AM EDT THU AUG 25 2016 /252 AM CDT THU AUG 25 2016/

.EARLY THIS MORNING...WEST WINDS 15 TO 25 KNOTS. WAVES CALM TO
2 FEET BUILDING TO 1 TO 3 FEET.
.TODAY...WEST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO 30 KNOTS
BY MID AFTERNOON. WAVES BUILDING TO 3 TO 6 FEET.
.TONIGHT...WEST WINDS 15 TO 25 KNOTS BECOMING NORTHWEST 10 TO
20 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.FRIDAY...NORTH WINDS 5 TO 15 KNOTS VEERING SOUTH BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
.FRIDAY NIGHT...SOUTH WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
.SATURDAY...SOUTHEAST WINDS LESS THAN 10 KNOTS BECOMING EAST 5 TO
15 KNOTS BY MID AFTERNOON. WAVES CALM TO 2 FEET.
.SATURDAY NIGHT...SOUTHEAST WINDS 5 TO 15 KNOTS BECOMING WEST
LESS THAN 10 KNOTS AFTER MIDNIGHT. A CHANCE OF SHOWERS. WAVES
CALM TO 2 FEET.
.SUNDAY...EAST WINDS 5 TO 15 KNOTS VEERING SOUTH. WAVES CALM TO
2 FEET.
.MONDAY...SOUTH WINDS 5 TO 15 KNOTS VEERING SOUTHWEST. A CHANCE
OF SHOWERS AND THUNDERSTORMS. WAVES CALM TO 2 FEET.

$$

LSZ263-251600-
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-
352 AM EDT THU AUG 25 2016

.EARLY THIS MORNING...WEST WINDS 10 TO 20 KNOTS. WAVES 1 TO
3 FEET.
.TODAY...WEST WINDS 10 TO 20 KNOTS INCREASING TO 20 TO 30 KNOTS
BY MID AFTERNOON. WAVES BUILDING TO 4 TO 7 FEET.
.TONIGHT...WEST WINDS 15 TO 25 KNOTS BECOMING NORTH 10 TO
20 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF SHOWERS AFTER
MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET.
.FRIDAY...NORTH WINDS 5 TO 15 KNOTS BACKING SOUTHWEST BY MID
AFTERNOON. A SLIGHT CHANCE OF SHOWERS IN THE MORNING. WAVES
SUBSIDING TO CALM TO 2 FEET.
.FRIDAY NIGHT...SOUTH WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
.SATURDAY...SOUTH WINDS 5 TO 15 KNOTS BACKING SOUTHEAST BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
.SATURDAY NIGHT...SOUTHEAST WINDS 5 TO 15 KNOTS BECOMING WEST
LESS THAN 10 KNOTS AFTER MIDNIGHT. A CHANCE OF SHOWERS. WAVES
CALM TO 2 FEET.
.SUNDAY...NORTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTH. WAVES CALM
TO 2 FEET.
.MONDAY...SOUTH WINDS 5 TO 15 KNOTS VEERING SOUTHWEST. A CHANCE
OF SHOWERS AND THUNDERSTORMS. WAVES CALM TO 2 FEET.

$$

LSZ264-251600-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
352 AM EDT THU AUG 25 2016

.EARLY THIS MORNING...WEST WINDS 15 TO 25 KNOTS. WAVES 1 TO
3 FEET.
.TODAY...WEST WINDS 15 TO 25 KNOTS BACKING SOUTHWEST BY MID
AFTERNOON. WAVES BUILDING TO 3 TO 6 FEET.
.TONIGHT...NORTHWEST WINDS 15 TO 25 KNOTS BECOMING NORTH 10 TO
20 KNOTS AFTER MIDNIGHT. WAVES BUILDING TO 4 TO 7 FEET...THEN
SUBSIDING TO 1 TO 3 FEET.
.FRIDAY...NORTH WINDS 5 TO 15 KNOTS BACKING WEST BY MID
AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.FRIDAY NIGHT...SOUTHWEST WINDS 5 TO 15 KNOTS BECOMING SOUTH
10 TO 20 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.SATURDAY...SOUTH WINDS 10 TO 20 KNOTS BACKING SOUTHEAST BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
.SATURDAY NIGHT...SOUTHEAST WINDS 5 TO 15 KNOTS. A CHANCE OF
SHOWERS. WAVES CALM TO 2 FEET.
.SUNDAY...NORTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTH. WAVES CALM
TO 2 FEET.
.MONDAY...SOUTH WINDS 10 TO 20 KNOTS VEERING SOUTHWEST. WAVES
CALM TO 2 FEET.

$$

LSZ265-251600-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
352 AM EDT THU AUG 25 2016

.EARLY THIS MORNING...WEST WINDS 15 TO 25 KNOTS. WAVES 1 TO 3
FEET.
.TODAY...WEST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO 20 KNOTS BY
MID AFTERNOON. WAVES 1 TO 3 FEET.
.TONIGHT...WEST WINDS 15 TO 25 KNOTS BECOMING NORTHWEST 10 TO
20 KNOTS AFTER MIDNIGHT. WAVES BUILDING TO 2 TO 4 FEET...THEN
SUBSIDING TO CALM TO 2 FEET.
.FRIDAY...NORTH WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
.FRIDAY NIGHT...SOUTHEAST WINDS LESS THAN 10 KNOTS BECOMING SOUTH
5 TO 15 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.SATURDAY...SOUTHEAST WINDS 5 TO 15 KNOTS BECOMING EAST 10 TO
20 KNOTS BY MID AFTERNOON. A CHANCE OF SHOWERS. WAVES CALM TO
2 FEET.
.SATURDAY NIGHT...SOUTHEAST WINDS 5 TO 15 KNOTS BECOMING NORTH
LESS THAN 10 KNOTS AFTER MIDNIGHT. A CHANCE OF SHOWERS. WAVES
CALM TO 2 FEET.
.SUNDAY...NORTH WINDS 5 TO 15 KNOTS VEERING SOUTH. WAVES CALM TO
2 FEET.
.MONDAY...SOUTH WINDS 5 TO 15 KNOTS BECOMING SOUTHWEST 10 TO
20 KNOTS. WAVES CALM TO 2 FEET.

$$

LSZ266-251600-
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-
352 AM EDT THU AUG 25 2016

.EARLY THIS MORNING...WEST WINDS 15 TO 25 KNOTS. WAVES 1 TO
3 FEET.
.TODAY...WEST WINDS 10 TO 20 KNOTS BACKING SOUTHWEST BY MID
AFTERNOON. WAVES BUILDING TO 3 TO 5 FEET.
.TONIGHT...WEST WINDS 15 TO 25 KNOTS BECOMING NORTHWEST 10 TO
20 KNOTS AFTER MIDNIGHT. WAVES 3 TO 6 FEET SUBSIDING TO 1 TO 3 FEET.
.FRIDAY...NORTH WINDS 10 TO 20 KNOTS BECOMING NORTHWEST 5 TO
15 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.FRIDAY NIGHT...SOUTHWEST WINDS LESS THAN 10 KNOTS BECOMING SOUTH
5 TO 15 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.SATURDAY...SOUTHEAST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS BY MID AFTERNOON. A CHANCE OF SHOWERS. WAVES CALM TO
2 FEET.
.SATURDAY NIGHT...EAST WINDS 5 TO 15 KNOTS. A CHANCE OF SHOWERS.
WAVES CALM TO 2 FEET.
.SUNDAY...NORTH WINDS 5 TO 15 KNOTS BACKING NORTHWEST. WAVES CALM
TO 2 FEET.
.MONDAY...SOUTH WINDS 5 TO 15 KNOTS BECOMING SOUTHWEST 10 TO
20 KNOTS. WAVES CALM TO 2 FEET.

$$

LSZ267-251600-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
352 AM EDT THU AUG 25 2016

.EARLY THIS MORNING...WEST WINDS 10 TO 20 KNOTS. PATCHY FOG.
WAVES CALM TO 2 FEET.
.TODAY...WEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO 15 KNOTS
BY MID AFTERNOON. WAVES BUILDING TO 1 TO 3 FEET...THEN SUBSIDING
TO CALM TO 2 FEET.
.TONIGHT...WEST WINDS 10 TO 20 KNOTS BECOMING NORTHWEST 15 TO
25 KNOTS AFTER MIDNIGHT. WAVES BUILDING TO 3 TO 5 FEET...THEN
SUBSIDING TO 2 TO 4 FEET.
.FRIDAY...NORTHWEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.FRIDAY NIGHT...NORTHWEST WINDS 5 TO 15 KNOTS BECOMING NORTH LESS
THAN 10 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.SATURDAY...SOUTHEAST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS BY MID AFTERNOON. A CHANCE OF SHOWERS. WAVES CALM TO
2 FEET.
.SATURDAY NIGHT...EAST WINDS 5 TO 15 KNOTS. SHOWERS LIKELY
THROUGH MIDNIGHT...THEN A CHANCE OF SHOWERS. WAVES CALM TO 2 FEET.
.SUNDAY...NORTHWEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS. A CHANCE OF SHOWERS. WAVES CALM TO 2 FEET.
.MONDAY...SOUTH WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.

$$

LSZ261-251600-
MAFOR 2509/
SUPERIOR WEST 12620 11530 11540 12640 11630 11720. WAVES 1 TO 6
FEET.

SUPERIOR NORTH CENTRAL 13620 11530 11540 11640 11730 11820. WAVES
2 TO 6 FEET.

SUPERIOR SOUTH CENTRAL 12620 11610 11620 13630 11720. WAVES 1 TO
4 FEET.

SUPERIOR EAST 13620 12510 12620 11720. PATCHY FOG EARLY THIS
MORNING. WAVES 1 TO 4 FEET.

$$

ROLFSON



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