Great Lakes Forecast
Issued by NWS

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000
FZUS63 KMQT 290154
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
954 PM EDT TUE JUL 28 2015

FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE SUPERIOR

.SYNOPSIS...A 29.3 INCH LOW PRESSURE MOVING NORTHEAST THROUGH
MANITOBA WILL DRAG A COLD FRONT ACROSS LAKE SUPERIOR LATE TONIGHT AND
WEDNESDAY MORNING. THE LOW WILL DRIFT OVER HUDSON BAY ON THURSDAY AND
REMAIN THERE THROUGH THE WEEKEND WHILE SLOWLY FILLING TO 29.5 INCHES.
EXPECT A LOW PRESSURE TROUGH AVERAGING 29.7 INCHES AND ROTATING
AROUND THE HUDSON BAY LOW TO CROSS THE UPPER GREAT LAKES ON FRIDAY
MORNING. A TRAILING 30.0 INCH HIGH PRESSURE WILL THEN MOVE THROUGH
THE GREAT LAKES ON SATURDAY AHEAD OF A 29.8 INCH LOW PRESSURE
DEVELOPING IN THE NORTHERN PLAINS. ON SUNDAY...THE HIGH PRESSURE
RIDGE WILL MOVE INTO THE MID ATLANTIC STATES AS THE PLAINS LOW DRIFTS
THROUGH NORTHWEST ONTARIO AND DRAGS ANOTHER COLD FRONT ACROSS THE
UPPER GREAT LAKES.

LSZ162-291000-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
954 PM EDT TUE JUL 28 2015

...GALE WARNING IN EFFECT FROM 8 AM EDT /7 AM CDT/ WEDNESDAY
THROUGH WEDNESDAY EVENING...

.REST OF TONIGHT...SOUTH WINDS 10 TO 20 KNOTS BECOMING SOUTHWEST
20 TO 30 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS BY LATE EVENING. WAVES CALM TO 2 FEET BUILDING TO
3 TO 5 FEET.
.WEDNESDAY...SOUTHWEST GALES TO 35 KNOTS VEERING WEST BY MID
AFTERNOON. WAVES BUILDING TO 6 TO 9 FEET...THEN SUBSIDING TO 3 TO
6 FEET.
.WEDNESDAY NIGHT...WEST WINDS 20 TO 30 KNOTS. WAVES 3 TO 6 FEET.
.THURSDAY...WEST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO 1 TO 3 FEET.
.THURSDAY NIGHT...WEST WINDS 10 TO 20 KNOTS. WAVES SUBSIDING TO
CALM TO 2 FEET.
.FRIDAY...WEST WINDS 10 TO 20 KNOTS. WAVES CALM TO 2 FEET.
.FRIDAY NIGHT...WEST WINDS 10 TO 20 KNOTS. WAVES CALM TO 2 FEET.
.SATURDAY...WEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST. WAVES
CALM TO 2 FEET.
.SUNDAY...WEST WINDS 5 TO 15 KNOTS VEERING NORTHWEST. WAVES CALM
TO 2 FEET.

$$

LSZ263-291000-
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-
954 PM EDT TUE JUL 28 2015

...GALE WARNING IN EFFECT FROM 8 AM EDT WEDNESDAY THROUGH
WEDNESDAY EVENING...

.REST OF TONIGHT...SOUTH WINDS 10 TO 20 KNOTS BECOMING SOUTHWEST
15 TO 25 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. PATCHY FOG AFTER MIDNIGHT. WAVES CALM TO 2 FEET
BUILDING TO 2 TO 4 FEET.
.WEDNESDAY...SOUTHWEST GALES TO 35 KNOTS. WAVES BUILDING TO 5 TO
9 FEET.
.WEDNESDAY NIGHT...WEST WINDS 20 TO 30 KNOTS. WAVES SUBSIDING TO
3 TO 6 FEET...THEN BUILDING TO 4 TO 7 FEET.
.THURSDAY...WEST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO 2 TO 4 FEET.
.THURSDAY NIGHT...WEST WINDS 10 TO 20 KNOTS. WAVES SUBSIDING TO
CALM TO 2 FEET.
.FRIDAY...WEST WINDS 10 TO 20 KNOTS. WAVES CALM TO 2 FEET.
.FRIDAY NIGHT...WEST WINDS 10 TO 20 KNOTS. WAVES CALM TO 2 FEET.
.SATURDAY...WEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST. WAVES
CALM TO 2 FEET.
.SUNDAY...WEST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.

$$

LSZ264-291000-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
954 PM EDT TUE JUL 28 2015

...GALE WARNING IN EFFECT FROM WEDNESDAY MORNING THROUGH
WEDNESDAY EVENING...

.REST OF TONIGHT...SOUTH WINDS 15 TO 25 KNOTS. PATCHY FOG. A
SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS. WAVES 1 TO 3 FEET
BUILDING TO 2 TO 4 FEET.
.WEDNESDAY...SOUTHWEST WINDS 20 TO 30 KNOTS INCREASING TO GALES
TO 35 KNOTS BY MID AFTERNOON. WAVES BUILDING TO 5 TO 8 FEET.
.WEDNESDAY NIGHT...WEST GALES TO 35 KNOTS DIMINISHING TO 20 TO
30 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO 3 TO 6 FEET...THEN
BUILDING TO 4 TO 7 FEET.
.THURSDAY...WEST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO 3 TO 5 FEET.
.THURSDAY NIGHT...WEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.FRIDAY...WEST WINDS 10 TO 20 KNOTS. WAVES CALM TO 2 FEET.
.FRIDAY NIGHT...WEST WINDS 10 TO 20 KNOTS. WAVES CALM TO 2 FEET.
.SATURDAY...WEST WINDS 10 TO 20 KNOTS BACKING SOUTHWEST. WAVES
CALM TO 2 FEET.
.SUNDAY...WEST WINDS 10 TO 20 KNOTS BECOMING NORTHWEST 5 TO
15 KNOTS. WAVES CALM TO 2 FEET.

$$

LSZ265-291000-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
954 PM EDT TUE JUL 28 2015

.REST OF TONIGHT...SOUTH WINDS 15 TO 25 KNOTS. A SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS. WAVES 1 TO 3 FEET.
.WEDNESDAY...SOUTHWEST WINDS 10 TO 20 KNOTS BECOMING WEST 15 TO
25 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET...
THEN BUILDING TO 3 TO 5 FEET.
.WEDNESDAY NIGHT...WEST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO
30 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO 2 TO 4 FEET...THEN
BUILDING TO 3 TO 5 FEET.
.THURSDAY...WEST WINDS 20 TO 30 KNOTS WITH A FEW GALE FORCE GUSTS
TO 35 KNOTS. WAVES SUBSIDING TO 1 TO 3 FEET.
.THURSDAY NIGHT...WEST WINDS 10 TO 20 KNOTS. WAVES SUBSIDING TO
CALM TO 2 FEET.
.FRIDAY...WEST WINDS 10 TO 20 KNOTS. WAVES CALM TO 2 FEET.
.FRIDAY NIGHT...WEST WINDS 10 TO 20 KNOTS. WAVES CALM TO 2 FEET.
.SATURDAY...WEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST. WAVES
CALM TO 2 FEET.
.SUNDAY...WEST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.

$$

LSZ266-291000-
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-
954 PM EDT TUE JUL 28 2015

.REST OF TONIGHT...SOUTH WINDS 15 TO 25 KNOTS. A SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS. WAVES 1 TO 3 FEET BUILDING TO 2 TO
4 FEET.
.WEDNESDAY...SOUTHWEST WINDS 15 TO 25 KNOTS BECOMING WEST 20 TO
30 KNOTS BY MID AFTERNOON. A SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS THROUGH EARLY AFTERNOON. WAVES BUILDING TO 5 TO
8 FEET.
.WEDNESDAY NIGHT...WEST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO
30 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO 3 TO 6 FEET.
.THURSDAY...WEST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO 3 TO 5 FEET.
.THURSDAY NIGHT...WEST WINDS 10 TO 20 KNOTS. WAVES SUBSIDING TO
1 TO 3 FEET.
.FRIDAY...WEST WINDS 10 TO 20 KNOTS. WAVES SUBSIDING TO CALM TO
2 FEET.
.FRIDAY NIGHT...WEST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.SATURDAY...WEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST. WAVES
CALM TO 2 FEET.
.SUNDAY...WEST WINDS 5 TO 15 KNOTS VEERING NORTHWEST. WAVES CALM
TO 2 FEET.

$$

LSZ267-291000-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
954 PM EDT TUE JUL 28 2015

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

$$
LSZ261-291000-
MAFOR 2903/
SUPERIOR WEST...GALE WARNING IN EFFECT...11430 11530 11540 13550
11650 11640. WAVES 1 TO 3 FEET OVERNIGHT. WAVES 3 TO 6 FEET
BUILDING TO 5 TO 9 FEET WEDNESDAY. WAVES 4 TO 7 FEET WEDNESDAY
EVENING.

SUPERIOR NORTH CENTRAL...GALE WARNING IN EFFECT...13430 11540
14550. PATCHY FOG LATE THIS EVENING. PATCHY FOG LATE WEDNESDAY
MORNING. WAVES 2 TO 4 FEET BUILDING TO 5 TO 8 FEET WEDNESDAY
AND WEDNESDAY EVENING.

SUPERIOR SOUTH CENTRAL 13430 11520 11620 11630 11640 11630. WAVES
1 TO 4 FEET.

SUPERIOR EAST 13430 11420 11510 11610 12630. CHANCE OF SHOWERS
AND THUNDERSTORMS LATE WEDNESDAY MORNING. WAVES 1 TO 4 FEET
BUILDING TO 3 TO 5 FEET WEDNESDAY EVENING.

$$

JS



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