Great Lakes Forecast
Issued by NWS

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000
FZUS63 KMQT 271953
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
353 PM EDT MON APR 27 2015

FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE SUPERIOR

.SYNOPSIS...A 30.2 INCH AREA OF HIGH PRESSURE OVER LAKE SUPERIOR
WILL WEAKEN TO 30.1 INCHES TUESDAY. LOOK FOR A WEAK 30.0 INCH TROUGH
OF LOW PRESSURE TO CROSS WESTERN LAKE SUPERIOR TUESDAY NIGHT INTO
WEDNESDAY. 30.3 INCH HIGH PRESSURE OVER HUDSON BAY WILL EXTEND A
RIDGE AVERAGING 30.1 INCHES ACROSS LAKE SUPERIOR FOR THE SECOND HALF
OF THE WORK WEEK. LOW PRESSURE OF 29.5 INCHES ACROSS CENTRAL CANADA
ON FRIDAY WILL BRING A 29.7 INCH TROUGH TO LAKE SUPERIOR LATE FRIDAY
INTO SATURDAY.

LSZ162-280400-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
353 PM EDT MON APR 27 2015

.LATE THIS AFTERNOON...SOUTHEAST WINDS 5 TO 15 KNOTS. WAVES CALM
TO 2 FEET.
.TONIGHT...SOUTHEAST WINDS LESS THAN 10 KNOTS VEERING SOUTH AFTER
MIDNIGHT. WAVES CALM TO 2 FEET.
.TUESDAY...WEST WINDS 5 TO 15 KNOTS DIMINISHING TO LESS THAN
10 KNOTS BY MID AFTERNOON. A SLIGHT CHANCE OF RAIN SHOWERS BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
.TUESDAY NIGHT...NORTH WINDS 5 TO 15 KNOTS VEERING NORTHEAST
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.WEDNESDAY...NORTH WINDS 5 TO 15 KNOTS BECOMING SOUTHEAST LESS
THAN 10 KNOTS BY MID AFTERNOON. WAVES CALM TO 2 FEET.
.WEDNESDAY NIGHT...EAST WINDS 5 TO 15 KNOTS BACKING NORTHEAST
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.THURSDAY...NORTHEAST WINDS 5 TO 15 KNOTS VEERING EAST BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
.THURSDAY NIGHT...EAST WINDS 5 TO 15 KNOTS VEERING SOUTHEAST
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.FRIDAY...SOUTH WINDS 5 TO 15 KNOTS VEERING WEST. WAVES CALM TO
2 FEET.
.SATURDAY...WEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST. WAVES
CALM TO 2 FEET.

$$

LSZ263-280400-
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-
353 PM EDT MON APR 27 2015

.LATE THIS AFTERNOON...SOUTHWEST WINDS 5 TO 15 KNOTS. WAVES CALM
TO 2 FEET.
.TONIGHT...WEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST AFTER
MIDNIGHT. WAVES CALM TO 2 FEET.
.TUESDAY...SOUTHWEST WINDS 5 TO 15 KNOTS VEERING WEST BY MID
AFTERNOON. A SLIGHT CHANCE OF RAIN SHOWERS BY MID AFTERNOON.
WAVES CALM TO 2 FEET.
.TUESDAY NIGHT...NORTH WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
.WEDNESDAY...NORTH WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
.WEDNESDAY NIGHT...NORTH WINDS 5 TO 15 KNOTS VEERING NORTHEAST
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.THURSDAY...NORTHEAST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
.THURSDAY NIGHT...EAST WINDS 5 TO 15 KNOTS VEERING SOUTH AFTER
MIDNIGHT. WAVES CALM TO 2 FEET.
.FRIDAY...SOUTH WINDS 5 TO 15 KNOTS VEERING SOUTHWEST. WAVES CALM
TO 2 FEET.
.SATURDAY...WEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST. WAVES
CALM TO 2 FEET.

$$

LSZ264-280400-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
353 PM EDT MON APR 27 2015

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

$$

LSZ265-280400-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
353 PM EDT MON APR 27 2015

.LATE THIS AFTERNOON...NORTH WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
.TONIGHT...NORTHWEST WINDS 5 TO 15 KNOTS BACKING WEST AFTER
MIDNIGHT. WAVES CALM TO 2 FEET.
.TUESDAY...SOUTH WINDS 5 TO 15 KNOTS BACKING SOUTHEAST BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
.TUESDAY NIGHT...NORTH WINDS 5 TO 15 KNOTS BACKING NORTHWEST
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.WEDNESDAY...NORTHWEST WINDS 10 TO 20 KNOTS VEERING NORTH BY MID
AFTERNOON. WAVES BUILDING TO 1 TO 3 FEET.
.WEDNESDAY NIGHT...NORTH WINDS 10 TO 20 KNOTS. WAVES 1 TO 3 FEET.
.THURSDAY...NORTH WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.THURSDAY NIGHT...NORTH WINDS 5 TO 15 KNOTS VEERING NORTHEAST
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.FRIDAY...EAST WINDS 5 TO 15 KNOTS VEERING SOUTH. WAVES CALM TO
2 FEET.
.SATURDAY...WEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST. WAVES
CALM TO 2 FEET.

$$

LSZ266-280400-
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-
353 PM EDT MON APR 27 2015

.LATE THIS AFTERNOON...NORTHWEST WINDS 10 TO 20 KNOTS. WAVES 1 TO
3 FEET.
.TONIGHT...NORTHWEST WINDS 5 TO 15 KNOTS. WAVES SUBSIDING TO CALM
TO 2 FEET.
.TUESDAY...SOUTHWEST WINDS LESS THAN 10 KNOTS BACKING SOUTH BY
MID AFTERNOON. WAVES CALM TO 2 FEET.
.TUESDAY NIGHT...NORTHWEST WINDS 5 TO 15 KNOTS INCREASING TO
10 TO 20 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF RAIN SHOWERS
THROUGH MIDNIGHT. SPRINKLES AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.WEDNESDAY...NORTH WINDS 15 TO 25 KNOTS. SPRINKLES THROUGH EARLY
AFTERNOON. A SLIGHT CHANCE OF RAIN SHOWERS BY MID AFTERNOON.
WAVES BUILDING TO 2 TO 4 FEET.
.WEDNESDAY NIGHT...NORTH WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET.
.THURSDAY...NORTH WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.THURSDAY NIGHT...NORTH WINDS 5 TO 15 KNOTS VEERING NORTHEAST
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.FRIDAY...SOUTH WINDS 5 TO 15 KNOTS VEERING SOUTHWEST. WAVES CALM
TO 2 FEET.
.SATURDAY...SOUTHWEST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.

$$

LSZ267-280400-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
353 PM EDT MON APR 27 2015

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

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

$$

LSZ261-280400-
MAFOR 2721/
SUPERIOR WEST 14400 12500 12600. WAVES 1 FOOT OR LESS.

SUPERIOR NORTH CENTRAL 12610 13600 13500. WAVES 1 FOOT OR LESS.

SUPERIOR SOUTH CENTRAL 12710 12700 11600 11500 11400 11300. WAVES
2 FEET OR LESS.

SUPERIOR EAST 11720 11710 11810 11800 11700 11600 12500. WAVES CALM
TO 3 FEET.

$$

PETRO



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