Great Lakes Forecast
Issued by NWS

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000
FZUS63 KMQT 190150
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
950 PM EDT THU SEP 18 2014

FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE SUPERIOR

.SYNOPSIS...HIGH PRESSURE AT 30.3 INCHES OVER THE BORDER OF ONTARIO
AND QUEBEC WILL REACH NEW ENGLAND 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 OVER
THE NORTHERN PLAINS WILL MOVE OVER THE MID MISSISSIPPI VALLEY. A
29.7 INCH LOW PRESSURE OVER NORTHERN ONTARIO MONDAY AFTERNOON WILL
DISSIPATE OVER EASTERN ONTARIO TUESDAY MORNING AS HIGH PRESSURE OVER
THE OHIO VALLEY BUILDS OVER THE GREAT LAKES.

LSZ162-191000-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
950 PM EDT THU SEP 18 2014 /850 PM CDT THU SEP 18 2014/

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

$$

LSZ263-191000-
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-
950 PM EDT THU SEP 18 2014

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

$$

LSZ264-191000-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
950 PM EDT THU SEP 18 2014

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

$$

LSZ265-191000-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
950 PM EDT THU SEP 18 2014

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

$$

LSZ266-191000-
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-
950 PM EDT THU SEP 18 2014

.REST OF TONIGHT...SOUTHEAST WINDS 15 TO 25 KNOTS VEERING SOUTH
AFTER MIDNIGHT. WAVES 1 TO 3 FEET BUILDING TO 3 TO 6 FEET.
.FRIDAY...SOUTH WINDS 20 TO 30 KNOTS. A SLIGHT CHANCE OF SHOWERS
THROUGH EARLY AFTERNOON...THEN SHOWERS LIKELY. WAVES BUILDING TO 4
TO 7 FEET...THEN SUBSIDING TO 3 TO 6 FEET.
.FRIDAY NIGHT...SOUTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS AFTER MIDNIGHT. SHOWERS LIKELY AND A CHANCE OF
THUNDERSTORMS. WAVES SUBSIDING TO 1 TO 3 FEET.
.SATURDAY...SOUTH WINDS 10 TO 20 KNOTS VEERING WEST BY MID
AFTERNOON. SHOWERS LIKELY AND A CHANCE OF THUNDERSTORMS. WAVES
SUBSIDING TO CALM TO 2 FEET...THEN BUILDING TO 1 TO 3 FEET.
.SATURDAY NIGHT...NORTHWEST WINDS 10 TO 20 KNOTS. 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...NORTHWEST WINDS 10 TO 20 KNOTS. WAVES SUBSIDING TO CALM
TO 2 FEET.

$$

LSZ267-191000-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
950 PM EDT THU SEP 18 2014

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

$$
LSZ261-191000-
MAFOR 1903/
SUPERIOR WEST 11310 11420 13430 12536 11526. SLIGHT CHANCE OF RAIN
SHOWERS IN THE MORNING. SLIGHT CHANCE OF THUNDERSTORMS FRIDAY
EVENING. WAVES 1 TO 4 FEET.

SUPERIOR NORTH CENTRAL 11330 12430 12440 12446 11426. SLIGHT CHANCE
OF RAIN SHOWERS IN THE MORNING. WAVES 2 TO 6 FEET.

SUPERIOR SOUTH CENTRAL 11330 12430 13440 12446. CHANCE OF RAIN
SHOWERS FRIDAY AFTERNOON. WAVES 2 TO 5 FEET.

SUPERIOR EAST 11320 11420 12430 13440 11446. SLIGHT CHANCE OF RAIN
SHOWERS FRIDAY AFTERNOON. WAVES 1 TO 6 FEET.

$$

PETRO




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