Great Lakes Forecast
Issued by NWS

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000
FZUS63 KMQT 301957
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
357 PM EDT THU APR 30 2015

FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE SUPERIOR

.SYNOPSIS...A HIGH PRESSURE RIDGE OF 30.1 INCHES FROM HUDSON BAY TO
THE WESTERN GREAT LAKES WILL SETTLE ACROSS THE OHIO VALLEY AND LOWER
GREAT LAKES THROUGH SATURDAY. AS THIS RIDGE REACHES THE EASTERN
SEABOARD BY MONDAY MORNING...LOW PRESSURE OF 29.4 INCHES WILL CROSS
NORTHERN ONTARIO AND QUEBEC WHILE DRAGGING A LOW PRESSURE TROUGH OF
29.7 INCHES ACROSS LAKE SUPERIOR SUNDAY NIGHT. IN THE WAKE OF THE
TROUGH...HIGH PRESSURE OF 30.2 INCHES WILL EXPAND FROM CENTRAL
CANADA ACROSS THE GREAT LAKES MONDAY INTO TUESDAY.

LSZ162-010400-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
357 PM EDT THU APR 30 2015

.LATE THIS AFTERNOON...EAST WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
.TONIGHT...EAST WINDS 5 TO 15 KNOTS DIMINISHING TO LESS THAN
10 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.FRIDAY...SOUTH WINDS LESS THAN 10 KNOTS INCREASING TO 5 TO
15 KNOTS BY MID AFTERNOON. ISOLATED RAIN SHOWERS THROUGH EARLY
AFTERNOON. WAVES CALM TO 2 FEET.
.FRIDAY NIGHT...SOUTHWEST WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
.SATURDAY...SOUTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTH BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
.SATURDAY NIGHT...SOUTH WINDS 5 TO 15 KNOTS VEERING SOUTHWEST
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.SUNDAY...SOUTHWEST WINDS 5 TO 15 KNOTS BECOMING WEST 10 TO
20 KNOTS BY MID AFTERNOON. A CHANCE OF RAIN SHOWERS. WAVES CALM
TO 2 FEET.
.SUNDAY NIGHT...WEST WINDS 10 TO 20 KNOTS BECOMING NORTHWEST 5 TO
15 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.MONDAY...EAST WINDS 5 TO 15 KNOTS VEERING WEST. WAVES CALM TO
2 FEET.
.TUESDAY...EAST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.

$$

LSZ263-010400-
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-
357 PM EDT THU APR 30 2015

.LATE THIS AFTERNOON...SOUTHWEST WINDS LESS THAN 10 KNOTS. WAVES
CALM TO 2 FEET.
.TONIGHT...WEST WINDS LESS THAN 10 KNOTS BACKING SOUTH AFTER
MIDNIGHT. WAVES CALM TO 2 FEET.
.FRIDAY...SOUTH WINDS 5 TO 15 KNOTS VEERING SOUTHWEST BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
.FRIDAY NIGHT...SOUTHWEST WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
.SATURDAY...SOUTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTH BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
.SATURDAY NIGHT...SOUTH WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
.SUNDAY...SOUTHWEST WINDS 10 TO 20 KNOTS. A CHANCE OF RAIN
SHOWERS. WAVES CALM TO 2 FEET.
.SUNDAY NIGHT...WEST WINDS 10 TO 20 KNOTS BECOMING NORTHWEST 5 TO
15 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.MONDAY...SOUTHWEST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
.TUESDAY...SOUTH WINDS 5 TO 15 KNOTS BACKING SOUTHEAST. WAVES
CALM TO 2 FEET.

$$

LSZ264-010400-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
357 PM EDT THU APR 30 2015

.LATE THIS AFTERNOON...NORTHWEST WINDS 5 TO 15 KNOTS. WAVES CALM
TO 2 FEET.
.TONIGHT...WEST WINDS LESS THAN 10 KNOTS BECOMING SOUTHWEST 5 TO
15 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.FRIDAY...SOUTH WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
.FRIDAY NIGHT...SOUTHWEST WINDS 5 TO 15 KNOTS BECOMING SOUTH LESS
THAN 10 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.SATURDAY...SOUTHWEST WINDS LESS THAN 10 KNOTS BECOMING SOUTH
5 TO 15 KNOTS BY MID AFTERNOON. WAVES CALM TO 2 FEET.
.SATURDAY NIGHT...SOUTH WINDS 10 TO 20 KNOTS. WAVES BUILDING TO
1 TO 3 FEET...THEN SUBSIDING TO CALM TO 2 FEET.
.SUNDAY...SOUTHWEST WINDS 10 TO 20 KNOTS. A CHANCE OF RAIN
SHOWERS. WAVES CALM TO 2 FEET.
.SUNDAY NIGHT...WEST WINDS 10 TO 20 KNOTS VEERING NORTHWEST AFTER
MIDNIGHT. WAVES CALM TO 2 FEET.
.MONDAY...NORTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST. WAVES
CALM TO 2 FEET.
.TUESDAY...SOUTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTH. WAVES
CALM TO 2 FEET.

$$

LSZ265-010400-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
357 PM EDT THU APR 30 2015

.LATE THIS AFTERNOON...NORTHWEST WINDS 5 TO 15 KNOTS. WAVES CALM
TO 2 FEET.
.TONIGHT...NORTHWEST WINDS LESS THAN 10 KNOTS BACKING SOUTHWEST
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.FRIDAY...SOUTH WINDS 5 TO 15 KNOTS BACKING SOUTHEAST BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
.FRIDAY NIGHT...SOUTH WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
.SATURDAY...SOUTH WINDS 5 TO 15 KNOTS BACKING SOUTHEAST BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
.SATURDAY NIGHT...SOUTH WINDS 10 TO 20 KNOTS. WAVES CALM TO
2 FEET.
.SUNDAY...SOUTH WINDS 10 TO 20 KNOTS BECOMING SOUTHWEST 5 TO
15 KNOTS BY MID AFTERNOON. A CHANCE OF SHOWERS AND THUNDERSTORMS.
WAVES CALM TO 2 FEET.
.SUNDAY NIGHT...WEST WINDS 10 TO 20 KNOTS VEERING NORTHWEST AFTER
MIDNIGHT. A CHANCE OF RAIN SHOWERS. WAVES CALM TO 2 FEET.
.MONDAY...NORTHWEST WINDS 5 TO 15 KNOTS BACKING WEST. WAVES CALM
TO 2 FEET.
.TUESDAY...SOUTHEAST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS. WAVES CALM TO 2 FEET.

$$

LSZ266-010400-
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-
357 PM EDT THU APR 30 2015

.LATE THIS AFTERNOON...NORTHWEST WINDS 10 TO 20 KNOTS. WAVES CALM
TO 2 FEET.
.TONIGHT...NORTHWEST WINDS 5 TO 15 KNOTS DIMINISHING TO LESS THAN
10 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.FRIDAY...SOUTH WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
.FRIDAY NIGHT...SOUTHEAST WINDS 5 TO 15 KNOTS VEERING SOUTH AFTER
MIDNIGHT. WAVES CALM TO 2 FEET.
.SATURDAY...SOUTH WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
.SATURDAY NIGHT...SOUTH WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS AFTER MIDNIGHT. WAVES BUILDING TO 1 TO 3 FEET...THEN
SUBSIDING TO CALM TO 2 FEET.
.SUNDAY...SOUTH WINDS 10 TO 20 KNOTS. A CHANCE OF RAIN SHOWERS.
WAVES CALM TO 2 FEET.
.SUNDAY NIGHT...WEST WINDS 10 TO 20 KNOTS VEERING NORTHWEST AFTER
MIDNIGHT. A CHANCE OF THUNDERSTORMS THROUGH MIDNIGHT. A CHANCE OF
RAIN SHOWERS. WAVES BUILDING TO 1 TO 3 FEET...THEN SUBSIDING TO
CALM TO 2 FEET.
.MONDAY...NORTHWEST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
.TUESDAY...SOUTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTH. WAVES
CALM TO 2 FEET.

$$

LSZ267-010400-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
357 PM EDT THU APR 30 2015

.LATE THIS AFTERNOON...NORTHWEST WINDS 10 TO 20 KNOTS. WAVES CALM
TO 2 FEET.
.TONIGHT...NORTHWEST WINDS 5 TO 15 KNOTS BECOMING NORTH LESS THAN
10 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.FRIDAY...SOUTHWEST WINDS LESS THAN 10 KNOTS BACKING SOUTHEAST BY
MID AFTERNOON. WAVES CALM TO 2 FEET.
.FRIDAY NIGHT...SOUTHEAST WINDS LESS THAN 10 KNOTS INCREASING TO
5 TO 15 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.SATURDAY...SOUTH WINDS LESS THAN 10 KNOTS. WAVES CALM TO 2 FEET.
.SATURDAY NIGHT...SOUTH WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
.SUNDAY...SOUTH WINDS 10 TO 20 KNOTS. WAVES CALM TO 2 FEET.
.SUNDAY NIGHT...SOUTHWEST WINDS 10 TO 20 KNOTS BECOMING WEST 5 TO
15 KNOTS AFTER MIDNIGHT. A CHANCE OF THUNDERSTORMS THROUGH
MIDNIGHT. A CHANCE OF RAIN SHOWERS. WAVES BUILDING TO 1 TO
3 FEET...THEN SUBSIDING TO CALM TO 2 FEET.
.MONDAY...NORTHWEST WINDS 5 TO 15 KNOTS VEERING NORTH. WAVES CALM
TO 2 FEET.
.TUESDAY...NORTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTHEAST. WAVES
CALM TO 2 FEET.

NOTE...WAVE HEIGHT FORECASTS ARE FOR ICE FREE AREAS.

$$

LSZ261-010400-
MAFOR 3021/
SUPERIOR WEST 11200 11100 13200 11300 12400. WAVES 1 FOOT OR
LESS.

SUPERIOR NORTH CENTRAL 11700 13600 11500 13400. WAVES 2 FEET OR
LESS.

SUPERIOR SOUTH CENTRAL 13700 11600 11500 11400 12300. WAVES 2
FEET OR LESS.

SUPERIOR EAST 12710 13800 11300 12400. WAVES 2 FEET OR LESS.

$$

PETRO



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