Great Lakes Forecast
Issued by NWS

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000
FZUS63 KMQT 241406
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
1006 AM EDT MON AUG 24 2015

FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE SUPERIOR

.SYNOPSIS...A 29.5 INCH LOW PRESSURE SYSTEM OVER NORTHERN ONTARIO
WILL WEAKEN TO 29.7 INCHES WHILE DRIFTING TO JAMES BAY TUESDAY
AFTERNOON. THE LOW WILL LIFT INTO QUEBEC ON WEDNESDAY...ALLOWING A
30.2 INCH HIGH PRESSURE TO BUILD INTO THE GREAT LAKES BY LATE
WEDNESDAY. AS THE HIGH SHIFTS TO THE MID ATLANTIC STATES ON
FRIDAY...A 29.9 INCH LOW PRESSURE TROUGH WILL APPROACH NORTHERN LAKE
SUPERIOR FROM THE NORTHWEST.

LSZ162-242215-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
1006 AM EDT MON AUG 24 2015 /906 AM CDT MON AUG 24 2015/

...GALE WARNING IN EFFECT UNTIL 8 PM EDT /7 PM CDT/ THIS
EVENING...

.REST OF TODAY...NORTHWEST GALES TO 35 KNOTS. SCATTERED SHOWERS.
WAVES 4 TO 7 FEET.
.TONIGHT...NORTHWEST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS AFTER MIDNIGHT. ISOLATED SHOWERS. WAVES SUBSIDING TO
2 TO 4 FEET.
.TUESDAY...NORTHWEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS BY MID AFTERNOON. A SLIGHT CHANCE OF SHOWERS THROUGH
EARLY AFTERNOON. WAVES SUBSIDING TO 1 TO 3 FEET.
.TUESDAY NIGHT...NORTHWEST WINDS 5 TO 15 KNOTS. A SLIGHT CHANCE
OF SHOWERS THROUGH MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.WEDNESDAY...NORTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST BY
MID AFTERNOON. WAVES CALM TO 2 FEET.
.WEDNESDAY NIGHT...SOUTHWEST WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
.THURSDAY...SOUTH WINDS 5 TO 15 KNOTS VEERING SOUTHWEST. A CHANCE
OF SHOWERS AND THUNDERSTORMS. WAVES CALM TO 2 FEET.
.FRIDAY...SOUTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTH. A CHANCE
OF SHOWERS AND THUNDERSTORMS. WAVES CALM TO 2 FEET.

$$

LSZ263-242215-
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-
1006 AM EDT MON AUG 24 2015

...GALE WARNING IN EFFECT UNTIL 8 PM EDT THIS EVENING...

.REST OF TODAY...NORTHWEST GALES TO 35 KNOTS. SCATTERED SHOWERS.
WAVES 5 TO 9 FEET.
.TONIGHT...NORTHWEST WINDS 20 TO 30 KNOTS. SCATTERED SHOWERS.
WAVES SUBSIDING TO 3 TO 5 FEET.
.TUESDAY...NORTHWEST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS BY MID AFTERNOON. A SLIGHT CHANCE OF SHOWERS. WAVES
SUBSIDING TO 2 TO 4 FEET.
.TUESDAY NIGHT...NORTHWEST WINDS 15 TO 25 KNOTS DIMINISHING TO
10 TO 20 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF SHOWERS. WAVES
SUBSIDING TO 1 TO 3 FEET.
.WEDNESDAY...NORTHWEST WINDS 5 TO 15 KNOTS BACKING WEST BY MID
AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.WEDNESDAY NIGHT...SOUTHWEST WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
.THURSDAY...SOUTHWEST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
.FRIDAY...SOUTHWEST WINDS 10 TO 20 KNOTS BACKING SOUTH. A CHANCE
OF SHOWERS AND THUNDERSTORMS. WAVES CALM TO 2 FEET.

$$

LSZ264-242215-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
1006 AM EDT MON AUG 24 2015

.REST OF TODAY...WEST WINDS 20 TO 30 KNOTS VEERING NORTHWEST BY
MID AFTERNOON. SHOWERS THROUGH LATE MORNING...THEN SCATTERED
SHOWERS. WAVES 5 TO 8 FEET SUBSIDING TO 3 TO 6 FEET.
.TONIGHT...NORTHWEST WINDS 20 TO 30 KNOTS. A FEW GALE FORCE GUSTS TO
35 KNOTS AFTER MIDNIGHT. SCATTERED SHOWERS. WAVES 3 TO 6 FEET.
.TUESDAY...NORTHWEST WINDS 20 TO 30 KNOTS. A FEW GALE FORCE
GUSTS TO 35 KNOTS. A CHANCE OF SHOWERS. WAVES 3 TO 6 FEET.
.TUESDAY NIGHT...NORTHWEST WINDS 20 TO 30 KNOTS BECOMING NORTH
15 TO 25 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF SHOWERS. WAVES
SUBSIDING TO 1 TO 3 FEET.
.WEDNESDAY...NORTHWEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.WEDNESDAY NIGHT...WEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.THURSDAY...SOUTHWEST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
.FRIDAY...SOUTHWEST WINDS 10 TO 20 KNOTS. A CHANCE OF SHOWERS AND
THUNDERSTORMS. WAVES CALM TO 2 FEET.

$$

LSZ265-242215-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
1006 AM EDT MON AUG 24 2015

...GALE WARNING IN EFFECT UNTIL 8 PM EDT THIS EVENING...

.REST OF TODAY...WEST GALES TO 35 KNOTS. NUMEROUS SHOWERS. WAVES
3 TO 6 FEET.
.TONIGHT...NORTHWEST WINDS 20 TO 30 KNOTS. SCATTERED SHOWERS.
WAVES 3 TO 6 FEET.
.TUESDAY...NORTHWEST WINDS 20 TO 30 KNOTS. A CHANCE OF SHOWERS.
WAVES 3 TO 6 FEET.
.TUESDAY NIGHT...NORTHWEST WINDS 20 TO 30 KNOTS BECOMING NORTH
15 TO 25 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF SHOWERS. WAVES
3 TO 5 FEET.
.WEDNESDAY...NORTHWEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.WEDNESDAY NIGHT...NORTHWEST WINDS 5 TO 15 KNOTS BACKING WEST
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.THURSDAY...SOUTH WINDS 5 TO 15 KNOTS VEERING SOUTHWEST. WAVES
CALM TO 2 FEET.
.FRIDAY...SOUTHWEST WINDS 10 TO 20 KNOTS BECOMING SOUTH 5 TO
15 KNOTS. A CHANCE OF SHOWERS AND THUNDERSTORMS. WAVES CALM TO
2 FEET.

$$

LSZ266-242215-
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-
1006 AM EDT MON AUG 24 2015

.REST OF TODAY...WEST WINDS 20 TO 30 KNOTS. A FEW GALE FORCE GUSTS TO
35 KNOTS THROUGH EARLY AFTERNOON. A SLIGHT CHANCE OF WATERSPOUTS.
SHOWERS. WAVES 4 TO 7 FEET.
.TONIGHT...NORTHWEST WINDS 20 TO 30 KNOTS. NUMEROUS SHOWERS.
WAVES 4 TO 7 FEET.
.TUESDAY...NORTHWEST WINDS 20 TO 30 KNOTS. A FEW GALE FORCE GUSTS
TO 35 KNOTS. SHOWERS LIKELY THROUGH EARLY AFTERNOON...THEN A CHANCE
OF SHOWERS. WAVES 4 TO 7 FEET.
.TUESDAY NIGHT...NORTHWEST WINDS 20 TO 30 KNOTS DIMINISHING TO
15 TO 25 KNOTS AFTER MIDNIGHT. A CHANCE OF SHOWERS. WAVES
BUILDING TO 5 TO 8 FEET...THEN SUBSIDING TO 3 TO 5 FEET.
.WEDNESDAY...NORTHWEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO 1 TO 3 FEET.
.WEDNESDAY NIGHT...NORTHWEST WINDS 5 TO 15 KNOTS BACKING WEST
AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.THURSDAY...SOUTH WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS. WAVES BUILDING TO 1 TO 3 FEET.
.FRIDAY...SOUTHWEST WINDS 10 TO 20 KNOTS BECOMING SOUTH 5 TO
15 KNOTS. A CHANCE OF SHOWERS AND THUNDERSTORMS. WAVES SUBSIDING
TO CALM TO 2 FEET.

$$

LSZ267-242215-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
1006 AM EDT MON AUG 24 2015

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

$$
LSZ261-242215-
MAFOR 2415/
SUPERIOR WEST...GALE WARNING IN EFFECT...13750 12740 13730.
SCATTERED SHOWERS THROUGH LATE THIS EVENING. WAVES 4 TO 7 FEET THIS
AFTERNOON...SUBSIDING TO 2 TO 4 FEET BY TUESDAY MORNING.

SUPERIOR NORTH CENTRAL 11646 11736 12730 14740. SCATTERED SHOWERS
TONIGHT AND TUESDAY MORNING. WAVES 4 TO 7 FEET.

SUPERIOR SOUTH CENTRAL...GALE WARNING IN EFFECT...12656 11756
14746 11746. WAVES 3 TO 7 FEET.

SUPERIOR EAST 13636 14736 11730. SLIGHT CHANCE OF WATERSPOUTS
THROUGH EARLY THIS EVENING. CHANCE OF SHOWERS TUESDAY MORNING. WAVES
3 TO 6 FEET.

$$

PETRO


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