Great Lakes Forecast
Issued by NWS

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000
FZUS63 KMQT 171950
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
350 PM EDT WED SEP 17 2014

FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE SUPERIOR

.SYNOPSIS...A 30.2 INCH HIGH PRESSURE WILL BUILD SOUTHEASTWARD FROM
CENTRAL CANADA THIS EVENING AND BECOME CENTERED JUST NORTHEAST OF
LAKE SUPERIOR BY THURSDAY MORNING. THE HIGH WILL MOVE TO NEW ENGLAND
ON FRIDAY BEFORE A 29.5 INCH TROUGH TRACKS INTO NORTHWEST ONTARIO
LATE FRIDAY. ANOTHER AREA OF LOW PRESSURE AVERAGING 29.6 INCHES WILL
DEVELOP OVER THE NORTHERN PLAINS FRIDAY NIGHT. THIS LOW WILL DEEPEN
TO 29.5 INCHES AS IT SHIFTS OVER THE UPPER GREAT LAKES REGION LATE
SATURDAY INTO SATURDAY NIGHT AND THEN INTO QUEBEC ON SUNDAY. AS THE
LOW SHIFTS INTO NORTHEASTERN QUEBEC SUNDAY NIGHT INTO MONDAY...HIGH
PRESSURE OF 30.2 INCHES WILL BUILD ACROSS THE NORTHERN PLAINS AND
INTO THE UPPER GREAT LAKES REGION.

LSZ162-180400-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
350 PM EDT WED SEP 17 2014 /250 PM CDT WED SEP 17 2014/

.LATE THIS AFTERNOON...EAST WINDS 15 TO 25 KNOTS. WAVES 3 TO 6 FEET.
.TONIGHT...EAST WINDS 10 TO 20 KNOTS. WAVES SUBSIDING TO 1 TO
3 FEET.
.THURSDAY...EAST WINDS 10 TO 20 KNOTS. WAVES SUBSIDING TO CALM TO
2 FEET...THEN BUILDING TO 1 TO 3 FEET.
.THURSDAY NIGHT...EAST WINDS 5 TO 15 KNOTS BECOMING SOUTH 10 TO
20 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF SHOWERS AFTER
MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET...THEN BUILDING TO
2 TO 4 FEET.
.FRIDAY...SOUTH WINDS 15 TO 25 KNOTS BECOMING SOUTHWEST 10 TO
20 KNOTS BY MID AFTERNOON. SHOWERS LIKELY AND A SLIGHT CHANCE OF
THUNDERSTORMS. WAVES BUILDING TO 3 TO 5 FEET...THEN SUBSIDING TO
1 TO 3 FEET.
.FRIDAY NIGHT...SOUTHWEST WINDS 5 TO 15 KNOTS. A CHANCE OF
SHOWERS AND THUNDERSTORMS. WAVES SUBSIDING TO CALM TO 2 FEET.
.SATURDAY...WEST WINDS 5 TO 15 KNOTS. A CHANCE OF SHOWERS AND
THUNDERSTORMS. WAVES CALM TO 2 FEET.
.SATURDAY NIGHT...WEST WINDS 10 TO 20 KNOTS. A CHANCE OF SHOWERS.
WAVES BUILDING TO 1 TO 3 FEET.
.SUNDAY...WEST WINDS 10 TO 20 KNOTS VEERING NORTH. WAVES
SUBSIDING TO CALM TO 2 FEET.
.MONDAY...NORTH WINDS 10 TO 20 KNOTS BECOMING WEST 5 TO 15 KNOTS.
WAVES CALM TO 2 FEET.

$$

LSZ263-180400-
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-
350 PM EDT WED SEP 17 2014

.LATE THIS AFTERNOON...NORTHEAST WINDS 10 TO 20 KNOTS. WAVES 3 TO
5 FEET.
.TONIGHT...NORTHEAST WINDS 10 TO 20 KNOTS BECOMING EAST 5 TO
15 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET.
.THURSDAY...SOUTHEAST WINDS 5 TO 15 KNOTS BACKING EAST BY MID
AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.THURSDAY NIGHT...SOUTHEAST WINDS 5 TO 15 KNOTS BECOMING SOUTH
10 TO 20 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF RAIN SHOWERS
AFTER MIDNIGHT. WAVES BUILDING TO 2 TO 4 FEET.
.FRIDAY...SOUTH WINDS 15 TO 25 KNOTS VEERING SOUTHWEST BY MID
AFTERNOON. A CHANCE OF SHOWERS THROUGH EARLY AFTERNOON. A SLIGHT
CHANCE OF THUNDERSTORMS. SHOWERS LIKELY BY MID AFTERNOON. WAVES
BUILDING TO 3 TO 5 FEET...THEN SUBSIDING TO 2 TO 4 FEET.
.FRIDAY NIGHT...SOUTHWEST WINDS 10 TO 20 KNOTS DIMINISHING TO
5 TO 15 KNOTS AFTER MIDNIGHT. A CHANCE OF SHOWERS AND
THUNDERSTORMS. WAVES SUBSIDING TO CALM TO 2 FEET.
.SATURDAY...WEST WINDS 5 TO 15 KNOTS. A CHANCE OF SHOWERS AND
THUNDERSTORMS. WAVES CALM TO 2 FEET.
.SATURDAY NIGHT...WEST WINDS 10 TO 20 KNOTS. A CHANCE OF SHOWERS.
WAVES BUILDING TO 1 TO 3 FEET.
.SUNDAY...WEST WINDS 10 TO 20 KNOTS VEERING NORTH. WAVES 1 TO
3 FEET.
.MONDAY...NORTH WINDS 10 TO 20 KNOTS BACKING WEST. WAVES
SUBSIDING TO CALM TO 2 FEET.

$$

LSZ264-180400-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
350 PM EDT WED SEP 17 2014

.LATE THIS AFTERNOON...NORTHEAST WINDS 10 TO 20 KNOTS. WAVES 2 TO
4 FEET.
.TONIGHT...NORTHEAST WINDS 5 TO 15 KNOTS BECOMING EAST 10 TO
20 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.THURSDAY...SOUTHEAST WINDS 10 TO 20 KNOTS. WAVES CALM TO 2 FEET.
.THURSDAY NIGHT...SOUTHEAST WINDS 15 TO 25 KNOTS VEERING SOUTH
AFTER MIDNIGHT. WAVES BUILDING TO 3 TO 6 FEET.
.FRIDAY...SOUTH WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS BY MID AFTERNOON. A CHANCE OF SHOWERS THROUGH EARLY
AFTERNOON. A SLIGHT CHANCE OF THUNDERSTORMS. SHOWERS BY MID
AFTERNOON. WAVES SUBSIDING TO 3 TO 6 FEET.
.FRIDAY NIGHT...SOUTHWEST WINDS 10 TO 20 KNOTS DIMINISHING TO
5 TO 15 KNOTS AFTER MIDNIGHT. A CHANCE OF SHOWERS AND
THUNDERSTORMS. WAVES SUBSIDING TO CALM TO 2 FEET.
.SATURDAY...WEST WINDS 5 TO 15 KNOTS. A CHANCE OF SHOWERS AND
THUNDERSTORMS. WAVES CALM TO 2 FEET.
.SATURDAY NIGHT...WEST WINDS 10 TO 20 KNOTS. A CHANCE OF SHOWERS.
WAVES BUILDING TO 2 TO 4 FEET.
.SUNDAY...NORTHWEST WINDS 10 TO 20 KNOTS VEERING NORTH. A CHANCE
OF RAIN SHOWERS. WAVES SUBSIDING TO 1 TO 3 FEET.
.MONDAY...NORTHWEST WINDS 10 TO 20 KNOTS BACKING WEST. WAVES
BUILDING TO 2 TO 4 FEET...THEN SUBSIDING TO CALM TO 2 FEET.

$$

LSZ265-180400-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
350 PM EDT WED SEP 17 2014

.LATE THIS AFTERNOON...NORTH WINDS 10 TO 20 KNOTS. WAVES 2 TO
4 FEET.
.TONIGHT...NORTHEAST WINDS 10 TO 20 KNOTS VEERING EAST AFTER
MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET.
.THURSDAY...EAST WINDS 10 TO 20 KNOTS VEERING SOUTHEAST BY MID
AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET...THEN BUILDING TO
1 TO 3 FEET.
.THURSDAY NIGHT...SOUTHEAST WINDS 10 TO 20 KNOTS BECOMING SOUTH
15 TO 25 KNOTS AFTER MIDNIGHT. WAVES BUILDING TO 3 TO 5 FEET.
.FRIDAY...SOUTH WINDS 15 TO 25 KNOTS. A CHANCE OF SHOWERS THROUGH
EARLY AFTERNOON...THEN SHOWERS LIKELY AND A SLIGHT CHANCE OF
THUNDERSTORMS BY MID AFTERNOON. WAVES SUBSIDING TO 2 TO 4 FEET...
THEN BUILDING TO 3 TO 5 FEET.
.FRIDAY NIGHT...SOUTHWEST WINDS 10 TO 20 KNOTS. A CHANCE OF
SHOWERS AND THUNDERSTORMS. WAVES SUBSIDING TO CALM TO 2 FEET.
.SATURDAY...WEST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO 20 KNOTS
BY MID AFTERNOON. A CHANCE OF SHOWERS AND THUNDERSTORMS. WAVES
CALM TO 2 FEET.
.SATURDAY NIGHT...WEST WINDS 10 TO 20 KNOTS. A CHANCE OF SHOWERS.
WAVES BUILDING TO 2 TO 4 FEET.
.SUNDAY...NORTHWEST WINDS 10 TO 20 KNOTS VEERING NORTH. WAVES
SUBSIDING TO 1 TO 3 FEET...THEN BUILDING TO 2 TO 4 FEET.
.MONDAY...NORTH WINDS 10 TO 20 KNOTS BACKING NORTHWEST. WAVES
SUBSIDING TO CALM TO 2 FEET.

$$

LSZ266-180400-
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-
350 PM EDT WED SEP 17 2014

.LATE THIS AFTERNOON...NORTH WINDS 10 TO 20 KNOTS. WAVES 2 TO
4 FEET.
.TONIGHT...NORTH WINDS 10 TO 20 KNOTS VEERING NORTHEAST AFTER
MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET.
.THURSDAY...EAST WINDS 5 TO 15 KNOTS. WAVES SUBSIDING TO CALM TO
2 FEET.
.THURSDAY NIGHT...SOUTHEAST WINDS 10 TO 20 KNOTS BECOMING SOUTH
15 TO 25 KNOTS AFTER MIDNIGHT. WAVES BUILDING TO 3 TO 6 FEET.
.FRIDAY...SOUTH WINDS 20 TO 30 KNOTS. A SLIGHT CHANCE OF SHOWERS
THROUGH EARLY AFTERNOON...THEN SHOWERS LIKELY BY MID AFTERNOON.
WAVES BUILDING TO 4 TO 7 FEET.
.FRIDAY NIGHT...SOUTH WINDS 15 TO 25 KNOTS BECOMING SOUTHWEST
10 TO 20 KNOTS AFTER MIDNIGHT. SHOWERS LIKELY THROUGH MIDNIGHT. A
CHANCE OF THUNDERSTORMS. A CHANCE OF SHOWERS AFTER MIDNIGHT.
WAVES SUBSIDING TO 1 TO 3 FEET.
.SATURDAY...SOUTHWEST WINDS 5 TO 15 KNOTS VEERING WEST BY MID
AFTERNOON. A CHANCE OF SHOWERS THROUGH EARLY AFTERNOON. A CHANCE
OF THUNDERSTORMS. SHOWERS LIKELY BY MID AFTERNOON. WAVES
SUBSIDING TO CALM TO 2 FEET.
.SATURDAY NIGHT...WEST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS AFTER MIDNIGHT. A CHANCE OF SHOWERS. WAVES BUILDING TO
2 TO 4 FEET.
.SUNDAY...NORTHWEST WINDS 15 TO 25 KNOTS VEERING NORTH. WAVES
BUILDING TO 3 TO 5 FEET...THEN SUBSIDING TO 2 TO 4 FEET.
.MONDAY...NORTH WINDS 15 TO 25 KNOTS BECOMING NORTHWEST 10 TO
20 KNOTS. WAVES SUBSIDING TO 1 TO 3 FEET.

$$

LSZ267-180400-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
350 PM EDT WED SEP 17 2014

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

$$

LSZ261-180400-
MAFOR 1721/
SUPERIOR WEST 11130 13220 11210 12310 11210. WAVES 2 TO 6 FEET.

SUPERIOR NORTH CENTRAL 11120 11810 12110 11210 13310. WAVES 1 TO 4
FEET.

SUPERIOR SOUTH CENTRAL 12820 11120 11110 12210 11310 11320. WAVES 2
TO 4 FEET.

SUPERIOR EAST 12820 12120 11110 12210 11200. WAVES 1 TO 4 FEET.

$$

KF




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