Great Lakes Forecast
Issued by NWS

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000
FZUS63 KMQT 100140
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
940 PM EDT WED APR 9 2014

FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE SUPERIOR

.SYNOPSIS...A HIGH PRESSURE RIDGE OF 30.0 INCHES FROM NEW YORK STATE
TO QUEBEC WILL MOVE EASTWARD OVERNIGHT. MEANWHILE...LOW PRESSURE OF
29.0 INCHES OVER FAR NORTHERN ONTARIO WILL DEEPEN TO 28.7 INCHES AS
IT MOVES OVER JAMES BAY THURSDAY. AN ASSOCIATED LOW PRESSURE TROUGH
OF 29.4 INCHES WILL CROSS LAKE SUPERIOR OVERNIGHT AND THURSDAY
MORNING. IN ITS WAKE...HIGH PRESSURE OF 30.0 INCHES WILL SHIFT FROM
THE PLAINS STATES THURSDAY TO THE OHIO VALLEY FRIDAY. A LOW PRESSURE
TROUGH OF 29.8 INCHES WILL THEN PUSH THROUGH THE UPPER GREAT LAKES
LATE FRIDAY BEFORE A HIGH PRESSURE RIDGE OF 30.1 INCHES MOVES OVER
LAKE SUPERIOR SATURDAY. A LOW PRESSURE TROUGH OF 29.7 INCHES
DEVELOPING IN THE PLAINS ON SATURDAY WILL MOVE OVER THE WESTERN GREAT
LAKES SUNDAY. LOW PRESSURE OF 29.6 INCHES OVER THE MISSISSIPPI RIVER
VALLEY WILL DEEPEN TO 29.4 INCHES AS IT MOVES OVER THE LOWER LAKES ON
MONDAY AFTERNOON.

LSZ162-100945-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
940 PM EDT WED APR 9 2014 /840 PM CDT WED APR 9 2014/

.REST OF TONIGHT...WEST WINDS 15 TO 25 KNOTS. A SLIGHT CHANCE OF
THUNDERSTORMS BY LATE EVENING. A CHANCE OF RAIN SHOWERS.
.THURSDAY...WEST WINDS 20 TO 30 KNOTS.
.THURSDAY NIGHT...WEST WINDS 10 TO 20 KNOTS BECOMING SOUTHWEST
5 TO 15 KNOTS AFTER MIDNIGHT.
.FRIDAY...SOUTHWEST WINDS 5 TO 15 KNOTS BECOMING WEST 10 TO
20 KNOTS BY MID AFTERNOON. A SLIGHT CHANCE OF RAIN SHOWERS.
.FRIDAY NIGHT...WEST WINDS 5 TO 15 KNOTS VEERING NORTHEAST AFTER
MIDNIGHT.
.SATURDAY...EAST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS BY MID AFTERNOON. A CHANCE OF RAIN THROUGH EARLY
AFTERNOON. RAIN LIKELY BY MID AFTERNOON.
.SATURDAY NIGHT...NORTHEAST WINDS 15 TO 25 KNOTS BECOMING NORTH
10 TO 20 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN AND SNOW.
.SUNDAY...NORTH WINDS 10 TO 20 KNOTS.
.MONDAY...NORTHWEST WINDS 10 TO 20 KNOTS VEERING NORTH.

NOTE...WAVES OMITTED FOR MOSTLY ICE COVERED AREAS.

$$

LSZ263-100945-
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-
940 PM EDT WED APR 9 2014

.REST OF TONIGHT...SOUTHWEST WINDS 20 TO 30 KNOTS VEERING WEST
AFTER MIDNIGHT. A SLIGHT CHANCE OF THUNDERSTORMS BY LATE EVENING.
A CHANCE OF RAIN SHOWERS.
.THURSDAY...WEST WINDS 20 TO 30 KNOTS.
.THURSDAY NIGHT...WEST WINDS 15 TO 25 KNOTS BECOMING SOUTHWEST
5 TO 15 KNOTS AFTER MIDNIGHT.
.FRIDAY...SOUTHWEST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS BY MID AFTERNOON. A SLIGHT CHANCE OF RAIN SHOWERS BY MID
AFTERNOON.
.FRIDAY NIGHT...WEST WINDS 5 TO 15 KNOTS VEERING NORTH AFTER
MIDNIGHT.
.SATURDAY...EAST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS BY MID AFTERNOON. A CHANCE OF RAIN THROUGH EARLY
AFTERNOON. RAIN LIKELY BY MID AFTERNOON.
.SATURDAY NIGHT...NORTHEAST WINDS 15 TO 25 KNOTS. A CHANCE OF
RAIN AND SNOW.
.SUNDAY...NORTH WINDS 10 TO 20 KNOTS.
.MONDAY...NORTHWEST WINDS 10 TO 20 KNOTS VEERING NORTH.

NOTE...WAVES OMITTED FOR MOSTLY ICE COVERED AREAS.

$$

LSZ264-100945-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
940 PM EDT WED APR 9 2014

.REST OF TONIGHT...SOUTHWEST WINDS 20 TO 30 KNOTS VEERING WEST
AFTER MIDNIGHT. A SLIGHT CHANCE OF THUNDERSTORMS BY LATE EVENING.
A CHANCE OF RAIN SHOWERS.
.THURSDAY...WEST WINDS 20 TO 30 KNOTS. A FEW GALE FORCE GUSTS TO 35
KNOTS.
.THURSDAY NIGHT...WEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS AFTER MIDNIGHT.
.FRIDAY...SOUTHWEST WINDS 10 TO 20 KNOTS. A SLIGHT CHANCE OF RAIN
SHOWERS BY MID AFTERNOON.
.FRIDAY NIGHT...WEST WINDS 10 TO 20 KNOTS VEERING NORTH AFTER
MIDNIGHT.
.SATURDAY...NORTHEAST WINDS 10 TO 20 KNOTS BECOMING EAST 15 TO
25 KNOTS BY MID AFTERNOON. A CHANCE OF RAIN.
.SATURDAY NIGHT...NORTHEAST WINDS 15 TO 25 KNOTS. A CHANCE OF
SNOW.
.SUNDAY...NORTH WINDS 15 TO 25 KNOTS.
.MONDAY...NORTH WINDS 10 TO 20 KNOTS.

NOTE...WAVES OMITTED FOR MOSTLY ICE COVERED AREAS.

$$

LSZ265-100945-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
940 PM EDT WED APR 9 2014

.REST OF TONIGHT...SOUTHWEST WINDS 20 TO 30 KNOTS VEERING WEST
AFTER MIDNIGHT. A CHANCE OF RAIN SHOWERS.
.THURSDAY...WEST WINDS 20 TO 30 KNOTS.
.THURSDAY NIGHT...WEST WINDS 15 TO 25 KNOTS DIMINISHING TO 5 TO
15 KNOTS AFTER MIDNIGHT.
.FRIDAY...SOUTHWEST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS BY MID AFTERNOON. A SLIGHT CHANCE OF RAIN SHOWERS.
.FRIDAY NIGHT...WEST WINDS 10 TO 20 KNOTS VEERING NORTH AFTER
MIDNIGHT.
.SATURDAY...EAST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS BY MID AFTERNOON. A CHANCE OF RAIN THROUGH EARLY
AFTERNOON...THEN RAIN LIKELY BY MID AFTERNOON.
.SATURDAY NIGHT...NORTHEAST WINDS 10 TO 20 KNOTS. A CHANCE OF
RAIN.
.SUNDAY...NORTH WINDS 15 TO 25 KNOTS.
.MONDAY...NORTH WINDS 10 TO 20 KNOTS.

NOTE...WAVES OMITTED FOR MOSTLY ICE COVERED AREAS.

$$

LSZ266-100945-
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-
940 PM EDT WED APR 9 2014

.REST OF TONIGHT...SOUTH WINDS 20 TO 30 KNOTS BECOMING SOUTHWEST
AFTER MIDNIGHT. A CHANCE OF RAIN SHOWERS.
.THURSDAY...WEST WINDS 20 TO 30 KNOTS. A FEW GALE FORCE GUSTS TO 35
KNOTS BY MID AFTERNOON.
.THURSDAY NIGHT...WEST WINDS 15 TO 25 KNOTS DIMINISHING TO 5 TO
15 KNOTS AFTER MIDNIGHT.
.FRIDAY...SOUTHWEST WINDS 10 TO 20 KNOTS BACKING SOUTH BY MID
AFTERNOON. A SLIGHT CHANCE OF RAIN SHOWERS BY MID AFTERNOON.
.FRIDAY NIGHT...WEST WINDS 10 TO 20 KNOTS VEERING NORTH AFTER
MIDNIGHT.
.SATURDAY...NORTHEAST WINDS 10 TO 20 KNOTS BECOMING EAST 15 TO
25 KNOTS BY MID AFTERNOON. A CHANCE OF RAIN.
.SATURDAY NIGHT...EAST WINDS 15 TO 25 KNOTS BECOMING NORTHEAST
10 TO 20 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN AND SNOW.
.SUNDAY...NORTH WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS. A CHANCE OF RAIN.
.MONDAY...NORTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS.

NOTE...WAVES OMITTED FOR MOSTLY ICE COVERED AREAS.

$$

LSZ267-100945-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
940 PM EDT WED APR 9 2014

.REST OF TONIGHT...SOUTH WINDS 20 TO 30 KNOTS VEERING SOUTHWEST
AFTER MIDNIGHT. A CHANCE OF RAIN SHOWERS AFTER MIDNIGHT.
.THURSDAY...WEST WINDS 20 TO 30 KNOTS. A FEW GALE FORCE GUSTS TO 35
KNOTS. A SLIGHT CHANCE OF RAIN SHOWERS THROUGH EARLY AFTERNOON.
.THURSDAY NIGHT...WEST WINDS 15 TO 25 KNOTS DIMINISHING TO 5 TO
15 KNOTS AFTER MIDNIGHT.
.FRIDAY...SOUTH WINDS 5 TO 15 KNOTS INCREASING TO 10 TO 20 KNOTS
BY MID AFTERNOON. A SLIGHT CHANCE OF RAIN SHOWERS...POSSIBLY
MIXED WITH SNOW BY MID AFTERNOON.
.FRIDAY NIGHT...SOUTHWEST WINDS 10 TO 20 KNOTS VEERING WEST AFTER
MIDNIGHT.
.SATURDAY...NORTHEAST WINDS 10 TO 20 KNOTS VEERING EAST BY MID
AFTERNOON. A CHANCE OF RAIN.
.SATURDAY NIGHT...EAST WINDS 15 TO 25 KNOTS BECOMING NORTHEAST
10 TO 20 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN AND SNOW.
.SUNDAY...NORTH WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS. A CHANCE OF RAIN. A CHANCE OF SNOW.
.MONDAY...NORTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS. A CHANCE OF SNOW SHOWERS.

NOTE...WAVES OMITTED FOR MOSTLY ICE COVERED AREAS.

$$
LSZ261-100945-
MAFOR 1003/
SUPERIOR WEST 16640. CHANCE OF RAIN SHOWERS AND SLIGHT CHANCE OF
THUNDERSTORMS OVERNIGHT. NOTE...WAVES OMITTED FOR MOSTLY ICE COVERED
AREAS.

SUPERIOR NORTH CENTRAL 11540 11646 15640. SLIGHT CHANCE OF RAIN
SHOWERS LATE THIS EVENING AND THURSDAY MORNING. NOTE...WAVES OMITTED
FOR MOSTLY ICE COVERED AREAS.

SUPERIOR SOUTH CENTRAL 11540 11546 15640. CHANCE OF RAIN SHOWERS
THURSDAY MORNING. NOTE...WAVES OMITTED FOR MOSTLY ICE COVERED AREAS.

SUPERIOR EAST 11440 11546 14640 11650 11640. CHANCE OF RAIN SHOWERS
THURSDAY MORNING. NOTE...WAVES OMITTED FOR MOSTLY ICE COVERED AREAS.

$$

PETRO





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