Great Lakes Forecast
Issued by NWS

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FZUS63 KMQT 121410
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
1010 AM EDT SUN APR 12 2015

FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE SUPERIOR

.SYNOPSIS...A 30.1 INCH HIGH PRESSURE RIDGE OVER THE LOWER GREAT
LAKES AND THE OHIO RIVER VALLEY WILL SHIFT EAST OF THE MID ATLANTIC
STATES TODAY. A 29.1 INCH LOW PRESSURE SYSTEM MOVING THROUGH CENTRAL
CANADA TODAY WILL MOVE TO HUDSON BAY ON MONDAY...DRAGGING A LOW
PRESSURE TROUGH OF 29.7 INCHES ACROSS THE GREAT LAKES TONIGHT. A
TRAILING 30.1 INCH HIGH PRESSURE SYSTEM WILL MOVE INTO THE GREAT
LAKES MONDAY NIGHT AND LINGER THROUGH WEDNESDAY NIGHT. THURSDAY...LOW
PRESSURE OF 29.5 INCHES WILL SLIDE OVER HUDSON BAY BRINGING A WEAK
TROUGH OF 30.0 INCHES ACROSS LAKE SUPERIOR.

LSZ162-122215-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
1010 AM EDT SUN APR 12 2015

.REST OF TODAY...SOUTH WINDS 15 TO 25 KNOTS. A SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS BY MID AFTERNOON. WAVES 2 TO 4 FEET.
.TONIGHT...SOUTHWEST WINDS 15 TO 25 KNOTS VEERING WEST AFTER
MIDNIGHT. RAIN SHOWERS LIKELY THROUGH MIDNIGHT. A SLIGHT CHANCE
OF THUNDERSTORMS. A SLIGHT CHANCE OF RAIN SHOWERS AFTER MIDNIGHT.
WAVES SUBSIDING TO 1 TO 3 FEET.
.MONDAY...WEST WINDS 20 TO 30 KNOTS INCREASING TO GALES TO
35 KNOTS BY MID AFTERNOON. WAVES BUILDING TO 3 TO 5 FEET.
.MONDAY NIGHT...WEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET.
.TUESDAY...WEST WINDS 5 TO 15 KNOTS BACKING SOUTH BY MID
AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.TUESDAY NIGHT...SOUTHEAST WINDS 10 TO 20 KNOTS VEERING SOUTH
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.WEDNESDAY...SOUTH WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS. WAVES CALM TO 2 FEET.
.THURSDAY...SOUTHWEST WINDS 5 TO 15 KNOTS VEERING WEST. WAVES
CALM TO 2 FEET.

$$

LSZ263-122215-
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-
1010 AM EDT SUN APR 12 2015

.REST OF TODAY...SOUTH WINDS 15 TO 25 KNOTS INCREASING TO 20 TO
30 KNOTS BY MID AFTERNOON. WAVES 2 TO 4 FEET.
.TONIGHT...SOUTH WINDS 15 TO 25 KNOTS VEERING WEST AFTER
MIDNIGHT. RAIN SHOWERS LIKELY AND A SLIGHT CHANCE OF
THUNDERSTORMS. WAVES BUILDING TO 3 TO 5 FEET...THEN SUBSIDING TO
1 TO 3 FEET.
.MONDAY...WEST WINDS 20 TO 30 KNOTS INCREASING TO GALES TO
35 KNOTS BY MID AFTERNOON. WAVES BUILDING TO 4 TO 7 FEET...THEN
SUBSIDING TO 3 TO 6 FEET.
.MONDAY NIGHT...WEST WINDS 20 TO 30 KNOTS DIMINISHING TO 10 TO
20 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO 2 TO 4 FEET.
.TUESDAY...WEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST BY MID
AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.TUESDAY NIGHT...SOUTH WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.WEDNESDAY...SOUTH WINDS 10 TO 20 KNOTS. WAVES CALM TO 2 FEET.
.THURSDAY...SOUTHWEST WINDS 5 TO 15 KNOTS VEERING WEST. WAVES
CALM TO 2 FEET.

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

$$

LSZ264-122215-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
1010 AM EDT SUN APR 12 2015

.REST OF TODAY...SOUTH WINDS 15 TO 25 KNOTS INCREASING TO 20 TO
30 KNOTS BY MID AFTERNOON.
.TONIGHT...SOUTH WINDS 20 TO 30 KNOTS BECOMING SOUTHWEST 15 TO
25 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN SHOWERS THROUGH
MIDNIGHT. A SLIGHT CHANCE OF THUNDERSTORMS. RAIN SHOWERS LIKELY
AFTER MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET.
.MONDAY...WEST WINDS 20 TO 30 KNOTS INCREASING TO GALES TO
35 KNOTS BY MID AFTERNOON. A SLIGHT CHANCE OF RAIN SHOWERS
THROUGH EARLY AFTERNOON. WAVES BUILDING TO 3 TO 5 FEET.
.MONDAY NIGHT...WEST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET.
.TUESDAY...WEST WINDS 10 TO 20 KNOTS BACKING SOUTHWEST BY MID
AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.TUESDAY NIGHT...SOUTH WINDS 10 TO 20 KNOTS. WAVES CALM TO
2 FEET.
.WEDNESDAY...SOUTH WINDS 10 TO 20 KNOTS. WAVES BUILDING TO 1 TO
3 FEET...THEN SUBSIDING TO CALM TO 2 FEET.
.THURSDAY...SOUTH WINDS 5 TO 15 KNOTS VEERING WEST. WAVES CALM TO
2 FEET.

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

$$

LSZ265-122215-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
1010 AM EDT SUN APR 12 2015

.REST OF TODAY...SOUTH WINDS 20 TO 30 KNOTS. WAVES CALM TO 2 FEET
BUILDING TO 2 TO 4 FEET.
.TONIGHT...SOUTH WINDS 20 TO 30 KNOTS BECOMING SOUTHWEST 15 TO
25 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN SHOWERS THROUGH
MIDNIGHT. A SLIGHT CHANCE OF THUNDERSTORMS. RAIN SHOWERS LIKELY
AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.MONDAY...WEST WINDS 20 TO 30 KNOTS INCREASING TO GALES TO
35 KNOTS BY MID AFTERNOON. A CHANCE OF RAIN SHOWERS THROUGH EARLY
AFTERNOON. WAVES BUILDING TO 2 TO 4 FEET.
.MONDAY NIGHT...WEST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF RAIN SHOWERS THROUGH
MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.TUESDAY...WEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO 15 KNOTS
BY MID AFTERNOON. WAVES CALM TO 2 FEET.
.TUESDAY NIGHT...SOUTH WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.WEDNESDAY...SOUTH WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS. WAVES CALM TO 2 FEET.
.THURSDAY...SOUTH WINDS 5 TO 15 KNOTS VEERING WEST. WAVES CALM TO
2 FEET.

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

$$

LSZ266-122215-
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-
1010 AM EDT SUN APR 12 2015

...GALE WARNING IN EFFECT FROM 4 PM EDT THIS AFTERNOON THROUGH
LATE TONIGHT...

.REST OF TODAY...SOUTH WINDS 20 TO 30 KNOTS INCREASING TO GALES
TO 35 KNOTS BY MID AFTERNOON. WAVES 1 TO 3 FEET BUILDING TO 3 TO
5 FEET.
.TONIGHT...SOUTH GALES TO 35 KNOTS DIMINISHING TO 20 TO 30 KNOTS
AFTER MIDNIGHT. A SLIGHT CHANCE OF RAIN SHOWERS THROUGH MIDNIGHT.
A SLIGHT CHANCE OF THUNDERSTORMS. RAIN SHOWERS LIKELY AFTER
MIDNIGHT. WAVES BUILDING TO 3 TO 6 FEET...THEN SUBSIDING TO 1 TO
3 FEET.
.MONDAY...WEST WINDS 20 TO 30 KNOTS INCREASING TO GALES TO
35 KNOTS BY MID AFTERNOON. A CHANCE OF RAIN SHOWERS. WAVES
BUILDING TO 3 TO 5 FEET.
.MONDAY NIGHT...WEST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF RAIN SHOWERS THROUGH
MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET.
.TUESDAY...WEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO 15 KNOTS
BY MID AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.TUESDAY NIGHT...SOUTH WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.WEDNESDAY...SOUTH WINDS 10 TO 20 KNOTS. WAVES BUILDING TO 1 TO
3 FEET...THEN SUBSIDING TO CALM TO 2 FEET.
.THURSDAY...SOUTH WINDS 10 TO 20 KNOTS BECOMING WEST 5 TO
15 KNOTS. WAVES CALM TO 2 FEET.

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

$$

LSZ267-122215-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
1010 AM EDT SUN APR 12 2015

.REST OF TODAY...SOUTH WINDS 15 TO 25 KNOTS INCREASING TO 20 TO
30 KNOTS BY MID AFTERNOON.
.TONIGHT...SOUTH WINDS 20 TO 30 KNOTS. A FEW GALE FORCE GUSTS TO 35
KNOTS POSSIBLE IN THE EVENING. A CHANCE OF RAIN SHOWERS AFTER
MIDNIGHT.
.MONDAY...WEST WINDS 20 TO 30 KNOTS INCREASING TO GALES TO
35 KNOTS BY MID AFTERNOON. RAIN SHOWERS LIKELY THROUGH EARLY
AFTERNOON...THEN A SLIGHT CHANCE OF RAIN SHOWERS BY MID
AFTERNOON.
.MONDAY NIGHT...WEST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF RAIN SHOWERS THROUGH
MIDNIGHT.
.TUESDAY...WEST WINDS 10 TO 20 KNOTS.
.TUESDAY NIGHT...SOUTH WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS AFTER MIDNIGHT.
.WEDNESDAY...SOUTHEAST WINDS 10 TO 20 KNOTS VEERING SOUTH.
.THURSDAY...SOUTHEAST WINDS 10 TO 20 KNOTS BECOMING SOUTH 5 TO
15 KNOTS. A CHANCE OF RAIN.

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

$$
LSZ261-122215-
MAFOR 1215/
SUPERIOR WEST 12430 12440 11536 11520 12630. SLIGHT CHANCE OF
THUNDERSTORMS AFTER MIDNIGHT TONIGHT. WAVES 2 TO 4 FEET.

SUPERIOR NORTH CENTRAL 11430 12440 11430 11440 12536 11630.
SLIGHT CHANCE OF THUNDERSTORMS TONIGHT. CHANCE OF RAIN SHOWERS
MONDAY MORNING. WAVES OMITTED FOR MOSTLY ICE COVERED AREAS.

SUPERIOR SOUTH CENTRAL...GALE WARNING IN EFFECT...12440 12450 11440
11430 11526 11630. SLIGHT CHANCE OF THUNDERSTORMS TONIGHT. WAVES 1 TO
5 FEET.

SUPERIOR EAST...GALE WARNING IN EFFECT...12440 13450 11440 11446
11546. CHANCE OF RAIN SHOWERS TONIGHT. WAVES OMITTED FOR MOSTLY
ICE COVERED AREAS.

$$

MRD


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