Great Lakes Forecast
Issued by NWS

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000
FZUS63 KMQT 210740
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
340 AM EDT SAT MAY 21 2016

FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE SUPERIOR

.SYNOPSIS...A WEAK LOW PRESSURE TROUGH AVERAGING 30.0 INCHES
DROPPING SOUTH THROUGH ONTARIO WILL DRIFT INTO THE UPPER LAKES TODAY
BUT THEN DISSIPATE TONIGHT AS A 30.2 INCH HIGH PRESSURE NEAR JAMES
BAY EXPANDS AND MERGES WITH ANOTHER 30.1 INCH HIGH ACROSS THE UPPER
MIDWEST. EXPECT THE HIGH TO THEN SHIFT SLOWLY SOUTHEAST OVER LOWER
MICHIGAN ON SUNDAY AND INTO THE MID ATLANTIC STATES ON TUESDAY.
MEANWHILE...A 29.4 INCH LOW PRESSURE DEVELOPING OVER SASKATCHEWAN ON
SUNDAY WILL MOVE EAST ACROSS SOUTHERN CANADA AND INTO ONTARIO ON
TUESDAY...WEAKENING TO 29.7 INCHES. THIS LOW WILL CONTINUE INTO
QUEBEC ON WEDNESDAY AND DRAG A COLD FRONT INTO THE UPPER GREAT LAKES
ON TUESDAY NIGHT. THE FRONT WILL THEN STALL JUST TO THE SOUTH OF
LAKE SUPERIOR ON WEDNESDAY TO THE NORTHEAST OF ANOTHER 29.7 INCH LOW
PRESSURE MOVING TOWARD THE UPPER MISSISSIPPI RIVER VALLEY.

LSZ162-211545-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
340 AM EDT SAT MAY 21 2016 /240 AM CDT SAT MAY 21 2016/

.EARLY THIS MORNING...WEST WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
.TODAY...WEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST BY MID
AFTERNOON. WAVES BUILDING TO 1 TO 3 FEET.
.TONIGHT...SOUTHEAST WINDS 5 TO 15 KNOTS BECOMING EAST LESS THAN
10 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.SUNDAY...SOUTHEAST WINDS LESS THAN 10 KNOTS BECOMING EAST 5 TO
15 KNOTS BY MID AFTERNOON. WAVES CALM TO 2 FEET.
.SUNDAY NIGHT...SOUTH WINDS 5 TO 15 KNOTS. A SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.MONDAY...SOUTH WINDS 5 TO 15 KNOTS. A CHANCE OF SHOWERS AND
THUNDERSTORMS. WAVES CALM TO 2 FEET.
.MONDAY NIGHT...SOUTH WINDS 5 TO 15 KNOTS VEERING SOUTHWEST AFTER
MIDNIGHT. SHOWERS LIKELY AND A CHANCE OF THUNDERSTORMS. WAVES
CALM TO 2 FEET.
.TUESDAY...SOUTHWEST WINDS 5 TO 15 KNOTS BACKING EAST. A CHANCE
OF RAIN SHOWERS. WAVES CALM TO 2 FEET.
.WEDNESDAY...EAST WINDS 5 TO 15 KNOTS BECOMING NORTHEAST 10 TO
20 KNOTS. A CHANCE OF RAIN SHOWERS. WAVES CALM TO 2 FEET.

$$

LSZ263-211545-
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-
340 AM EDT SAT MAY 21 2016

.EARLY THIS MORNING...SOUTHWEST WINDS 5 TO 15 KNOTS. WAVES CALM
TO 2 FEET.
.TODAY...SOUTHWEST WINDS 5 TO 15 KNOTS. WAVES BUILDING TO 1 TO
3 FEET.
.TONIGHT...SOUTHEAST WINDS LESS THAN 10 KNOTS. WAVES SUBSIDING TO
CALM TO 2 FEET.
.SUNDAY...SOUTHEAST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
.SUNDAY NIGHT...SOUTH WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
.MONDAY...SOUTH WINDS 10 TO 20 KNOTS. A CHANCE OF SHOWERS AND
THUNDERSTORMS. WAVES CALM TO 2 FEET.
.MONDAY NIGHT...SOUTH WINDS 10 TO 20 KNOTS VEERING SOUTHWEST
AFTER MIDNIGHT. SHOWERS LIKELY AND A CHANCE OF THUNDERSTORMS.
WAVES CALM TO 2 FEET.
.TUESDAY...SOUTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTHEAST. WAVES
CALM TO 2 FEET.
.WEDNESDAY...NORTHEAST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS. A CHANCE OF SHOWERS AND THUNDERSTORMS. WAVES CALM TO
2 FEET.

$$

LSZ264-211545-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
340 AM EDT SAT MAY 21 2016

.EARLY THIS MORNING...SOUTHWEST WINDS 5 TO 15 KNOTS. WAVES CALM
TO 2 FEET.
.TODAY...WEST WINDS 5 TO 15 KNOTS VEERING NORTHWEST BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
.TONIGHT...EAST WINDS LESS THAN 10 KNOTS BECOMING SOUTHEAST 5 TO
15 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.SUNDAY...SOUTHEAST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
.SUNDAY NIGHT...SOUTH WINDS 10 TO 20 KNOTS. WAVES CALM TO 2 FEET.
.MONDAY...SOUTH WINDS 10 TO 20 KNOTS. WAVES BUILDING TO 2 TO
4 FEET.
.MONDAY NIGHT...SOUTH WINDS 10 TO 20 KNOTS. A CHANCE OF SHOWERS
AND THUNDERSTORMS. WAVES SUBSIDING TO 1 TO 3 FEET.
.TUESDAY...SOUTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTH. A CHANCE
OF RAIN SHOWERS. WAVES SUBSIDING TO CALM TO 2 FEET.
.WEDNESDAY...NORTHEAST WINDS 10 TO 20 KNOTS. A CHANCE OF RAIN
SHOWERS. WAVES CALM TO 2 FEET.

$$

LSZ265-211545-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
340 AM EDT SAT MAY 21 2016

.EARLY THIS MORNING...SOUTHWEST WINDS 5 TO 15 KNOTS. WAVES CALM
TO 2 FEET.
.TODAY...WEST WINDS 5 TO 15 KNOTS VEERING NORTH BY MID AFTERNOON.
WAVES CALM TO 2 FEET.
.TONIGHT...NORTH WINDS LESS THAN 10 KNOTS VEERING EAST AFTER
MIDNIGHT. WAVES CALM TO 2 FEET.
.SUNDAY...SOUTHEAST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS BY MID AFTERNOON. WAVES CALM TO 2 FEET.
.SUNDAY NIGHT...SOUTH WINDS 10 TO 20 KNOTS. WAVES CALM TO 2 FEET.
.MONDAY...SOUTH WINDS 10 TO 20 KNOTS INCREASING TO 15 TO 25 KNOTS
BY MID AFTERNOON. WAVES BUILDING TO 2 TO 4 FEET.
.MONDAY NIGHT...SOUTH WINDS 10 TO 20 KNOTS. A CHANCE OF SHOWERS.
WAVES SUBSIDING TO CALM TO 2 FEET.
.TUESDAY...SOUTH WINDS 5 TO 15 KNOTS BACKING NORTH. A CHANCE OF
SHOWERS AND THUNDERSTORMS. WAVES CALM TO 2 FEET.
.WEDNESDAY...NORTHEAST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS. A CHANCE OF SHOWERS AND THUNDERSTORMS. WAVES CALM TO
2 FEET.

$$

LSZ266-211545-
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-
340 AM EDT SAT MAY 21 2016

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

$$

LSZ267-211545-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
340 AM EDT SAT MAY 21 2016

.EARLY THIS MORNING...WEST WINDS LESS THAN 10 KNOTS. WAVES CALM
TO 2 FEET.
.TODAY...WEST WINDS LESS THAN 10 KNOTS BECOMING NORTHWEST 5 TO
15 KNOTS BY MID AFTERNOON. WAVES CALM TO 2 FEET.
.TONIGHT...NORTHWEST WINDS 5 TO 15 KNOTS VEERING EAST AFTER
MIDNIGHT. WAVES CALM TO 2 FEET.
.SUNDAY...EAST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO 20 KNOTS
BY MID AFTERNOON. WAVES CALM TO 2 FEET.
.SUNDAY NIGHT...SOUTH WINDS 10 TO 20 KNOTS. WAVES BUILDING TO
1 TO 3 FEET.
.MONDAY...SOUTH WINDS 10 TO 20 KNOTS. WAVES SUBSIDING TO CALM TO
2 FEET...THEN BUILDING TO 1 TO 3 FEET.
.MONDAY NIGHT...SOUTH WINDS 10 TO 20 KNOTS. A CHANCE OF SHOWERS
AFTER MIDNIGHT. WAVES 1 TO 3 FEET.
.TUESDAY...SOUTH WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS. RAIN SHOWERS LIKELY...THEN A CHANCE OF SHOWERS AND
THUNDERSTORMS. WAVES SUBSIDING TO CALM TO 2 FEET.
.WEDNESDAY...EAST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS. A CHANCE OF RAIN SHOWERS. WAVES CALM TO 2 FEET.

$$

LSZ261-211545-
MAFOR 2109/
SUPERIOR WEST 12600 11610 12510 11400 12300. WAVES 1 TO 3 FEET.

SUPERIOR NORTH CENTRAL 11500 11610 11710 13700 12200. WAVES 1 TO
2 FEET.

SUPERIOR SOUTH CENTRAL 11500 12600 14800 11200. WAVES 2 FEET OR
LESS.

SUPERIOR EAST 13600 12700 12800 11100. WAVES 2 FEET OR LESS.

$$

JLB



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