Great Lakes Forecast
Issued by NWS

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000
FZUS63 KMQT 201949
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
349 PM EDT SAT SEP 20 2014

FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE SUPERIOR

.SYNOPSIS...A 29.5 INCH LOW PRESSURE OVER ONTARIO WILL MOVE INTO
SOUTHERN QUEBEC THIS EVENING. ANOTHER LOW PRESSURE TROUGH AVERAGING
29.7 INCHES WILL SWING THROUGH THE UPPER GREAT LAKES TONIGHT...AND
REACH THE LOWER GREAT LAKES BY SUNDAY EVENING. A 30.3 INCH HIGH
PRESSURE CENTER OVER THE NORTHERN PLAINS ON SUNDAY WILL THEN MOVE
SOUTHEAST INTO THE OHIO RIVER VALLEY ON MONDAY. LOOK FOR ANOTHER LOW
PRESSURE TROUGH AVERAGING 30.0 INCHES TO SLIDE ACROSS LAKE SUPERIOR
ON MONDAY NIGHT IN ADVANCE OF A 30.3 INCH HIGH PRESSURE BUILDING INTO
NORTHWEST ONTARIO. THIS HIGH PRESSURE SYSTEM WILL SHIFT OVER NEW
ENGLAND ON WEDNESDAY WITH RIDGING REMAINING ACROSS THE GREAT LAKES.

LSZ162-210300-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
349 PM EDT SAT SEP 20 2014 /249 PM CDT SAT SEP 20 2014/

.LATE THIS AFTERNOON...WEST WINDS 5 TO 15 KNOTS. A SLIGHT CHANCE
OF SHOWERS AND THUNDERSTORMS. WAVES CALM TO 2 FEET.
.TONIGHT...NORTH WINDS 5 TO 15 KNOTS VEERING NORTHEAST AFTER
MIDNIGHT. A SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS. WAVES
CALM TO 2 FEET.
.SUNDAY...NORTHEAST WINDS 5 TO 15 KNOTS VEERING SOUTH BY MID
AFTERNOON. WAVES BUILDING TO 1 TO 3 FEET...THEN SUBSIDING TO CALM
TO 2 FEET.
.SUNDAY NIGHT...SOUTHWEST WINDS 5 TO 15 KNOTS VEERING WEST AFTER
MIDNIGHT. WAVES CALM TO 2 FEET.
.MONDAY...WEST WINDS 5 TO 15 KNOTS BECOMING SOUTHWEST 10 TO
20 KNOTS BY MID AFTERNOON. WAVES BUILDING TO 1 TO 3 FEET.
.MONDAY NIGHT...WEST WINDS 5 TO 15 KNOTS. WAVES SUBSIDING TO CALM
TO 2 FEET.
.TUESDAY...SOUTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTH BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
.TUESDAY NIGHT...SOUTHEAST WINDS 5 TO 15 KNOTS VEERING SOUTH
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.WEDNESDAY...SOUTH WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
.THURSDAY...SOUTH WINDS 5 TO 15 KNOTS BACKING SOUTHEAST. WAVES
CALM TO 2 FEET.

$$

LSZ263-210300-
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-
349 PM EDT SAT SEP 20 2014

.LATE THIS AFTERNOON...WEST WINDS 5 TO 15 KNOTS. PATCHY FOG.
WAVES CALM TO 2 FEET.
.TONIGHT...NORTHEAST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS AFTER MIDNIGHT. PATCHY FOG THROUGH MIDNIGHT. A SLIGHT
CHANCE OF SHOWERS AND THUNDERSTORMS. WAVES CALM TO 2 FEET.
.SUNDAY...NORTH WINDS 5 TO 15 KNOTS. WAVES BUILDING TO 1 TO
3 FEET...THEN SUBSIDING TO CALM TO 2 FEET.
.SUNDAY NIGHT...SOUTHWEST WINDS LESS THAN 10 KNOTS INCREASING TO
5 TO 15 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.MONDAY...SOUTHWEST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS BY MID AFTERNOON. WAVES BUILDING TO 2 TO 4 FEET.
.MONDAY NIGHT...WEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.TUESDAY...SOUTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTH BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
.TUESDAY NIGHT...SOUTH WINDS 10 TO 20 KNOTS. WAVES CALM TO
2 FEET.
.WEDNESDAY...SOUTH WINDS 10 TO 20 KNOTS. WAVES CALM TO 2 FEET.
.THURSDAY...SOUTH WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.

$$

LSZ264-210300-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
349 PM EDT SAT SEP 20 2014

.LATE THIS AFTERNOON...NORTH WINDS 5 TO 15 KNOTS. AREAS OF FOG.
WAVES CALM TO 2 FEET.
.TONIGHT...NORTH WINDS 5 TO 15 KNOTS BECOMING NORTHEAST 10 TO
20 KNOTS AFTER MIDNIGHT. AREAS OF FOG THROUGH MIDNIGHT. WAVES
CALM TO 2 FEET.
.SUNDAY...NORTH WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO 15 KNOTS
BY MID AFTERNOON. WAVES BUILDING TO 1 TO 3 FEET.
.SUNDAY NIGHT...NORTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST
AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.MONDAY...SOUTHWEST WINDS 10 TO 20 KNOTS BECOMING WEST 15 TO
25 KNOTS BY MID AFTERNOON. WAVES BUILDING TO 2 TO 4 FEET.
.MONDAY NIGHT...WEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.TUESDAY...WEST WINDS 5 TO 15 KNOTS BACKING SOUTH BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
.TUESDAY NIGHT...SOUTH WINDS 10 TO 20 KNOTS. WAVES CALM TO
2 FEET.
.WEDNESDAY...SOUTH WINDS 10 TO 20 KNOTS. WAVES CALM TO 2 FEET.
.THURSDAY...SOUTH WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS. WAVES CALM TO 2 FEET.

$$

LSZ265-210300-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
349 PM EDT SAT SEP 20 2014

.LATE THIS AFTERNOON...NORTHWEST WINDS 10 TO 20 KNOTS. PATCHY
FOG. WAVES CALM TO 2 FEET.
.TONIGHT...NORTH WINDS 5 TO 15 KNOTS BECOMING NORTHEAST 10 TO
20 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.SUNDAY...NORTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS BY MID AFTERNOON. WAVES BUILDING TO 3 TO 5 FEET.
.SUNDAY NIGHT...NORTH WINDS 5 TO 15 KNOTS BACKING WEST AFTER
MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.MONDAY...WEST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
.MONDAY NIGHT...WEST WINDS 10 TO 20 KNOTS. WAVES BUILDING TO 1 TO
3 FEET...THEN SUBSIDING TO CALM TO 2 FEET.
.TUESDAY...WEST WINDS 5 TO 15 KNOTS BECOMING SOUTH LESS THAN
10 KNOTS BY MID AFTERNOON. WAVES CALM TO 2 FEET.
.TUESDAY NIGHT...SOUTHEAST WINDS 10 TO 20 KNOTS VEERING SOUTH
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.WEDNESDAY...SOUTH WINDS 10 TO 20 KNOTS. WAVES CALM TO 2 FEET.
.THURSDAY...SOUTHEAST WINDS 5 TO 15 KNOTS VEERING SOUTH. WAVES
CALM TO 2 FEET.

$$

LSZ266-210300-
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-
349 PM EDT SAT SEP 20 2014

.LATE THIS AFTERNOON...NORTHWEST WINDS 10 TO 20 KNOTS. AREAS OF
FOG. WAVES 1 TO 3 FEET SUBSIDING TO CALM TO 2 FEET.
.TONIGHT...NORTH WINDS 10 TO 20 KNOTS. AREAS OF FOG. WAVES
BUILDING TO 1 TO 3 FEET...THEN SUBSIDING TO CALM TO 2 FEET.
.SUNDAY...NORTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS BY MID AFTERNOON. WAVES BUILDING TO 3 TO 5 FEET.
.SUNDAY NIGHT...NORTH WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.MONDAY...WEST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO 20 KNOTS
BY MID AFTERNOON. WAVES BUILDING TO 2 TO 4 FEET.
.MONDAY NIGHT...WEST WINDS 10 TO 20 KNOTS. WAVES SUBSIDING TO
1 TO 3 FEET.
.TUESDAY...WEST WINDS 5 TO 15 KNOTS BECOMING SOUTHWEST LESS THAN
10 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.TUESDAY NIGHT...SOUTHEAST WINDS 5 TO 15 KNOTS BECOMING SOUTH
10 TO 20 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.WEDNESDAY...SOUTH WINDS 10 TO 20 KNOTS. WAVES BUILDING TO 1 TO
3 FEET...THEN SUBSIDING TO CALM TO 2 FEET.
.THURSDAY...SOUTH WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS. WAVES CALM TO 2 FEET.

$$

LSZ267-210300-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
349 PM EDT SAT SEP 20 2014

.LATE THIS AFTERNOON...WEST WINDS 10 TO 20 KNOTS. AREAS OF FOG. A
SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS. WAVES 1 TO 3 FEET.
.TONIGHT...NORTHWEST WINDS 10 TO 20 KNOTS BECOMING NORTH 15 TO
25 KNOTS AFTER MIDNIGHT. AREAS OF FOG. WAVES 1 TO 3 FEET.
.SUNDAY...NORTH WINDS 15 TO 25 KNOTS. WAVES BUILDING TO 3 TO
5 FEET.
.SUNDAY NIGHT...NORTH WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.MONDAY...WEST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
.MONDAY NIGHT...WEST WINDS 5 TO 15 KNOTS. WAVES BUILDING TO 1 TO
3 FEET...THEN SUBSIDING TO CALM TO 2 FEET.
.TUESDAY...WEST WINDS 5 TO 15 KNOTS BACKING SOUTH BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
.TUESDAY NIGHT...SOUTHEAST WINDS 5 TO 15 KNOTS BECOMING SOUTH
10 TO 20 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.WEDNESDAY...SOUTH WINDS 10 TO 20 KNOTS. WAVES CALM TO 2 FEET.
.THURSDAY...SOUTH WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS. WAVES CALM TO 2 FEET.

$$

LSZ261-210300-
MAFOR 2021/
SUPERIOR WEST 11610 11600 11810 13110 12200. SLIGHT CHANCE OF RAIN
SHOWERS AND THUNDERSTORMS TONIGHT. WAVES 2 FEET OR LESS.

SUPERIOR NORTH CENTRAL 11713 11813 13110 13820. WAVES 1 TO 3 FEET.

SUPERIOR SOUTH CENTRAL 11723 12810 11110 11820 13830. WAVES 1 TO 5
FEET.

SUPERIOR EAST 12723 12823 11820 13830. SLIGHT CHANCE OF RAIN SHOWERS
AND THUNDERSTORMS THIS EVENING. WAVES 2 TO 4 FEET.

$$

MZ




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