Great Lakes Forecast
Issued by NWS

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000
FZUS63 KMQT 231417
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
1017 AM EDT SUN AUG 23 2015

FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE SUPERIOR

.SYNOPSIS...AS 29.4 INCH LOW PRESSURE TO THE NORTH OF THE LAKE OF
THE WOODS DRIFTS EAST...A COLD FRONT WILL SWEEP ACROSS LAKE
SUPERIOR TODAY. AS THE LOW WEAKENS TO 29.7 INCHES WHILE DRIFTING TO
JAMES BAY BY TUESDAY AFTERNOON...IT WILL SWEEP ANOTHER TROUGH OF
29.6 INCHES ACROSS LAKE SUPERIOR LATE TONIGHT THROUGH MONDAY NIGHT.
THE LOW WILL REMAIN NEAR JAMES BAY TUESDAY AND THEN DRIFT TO QUEBEC
WEDNESDAY AS HIGH PRESSURE OF 30.1 INCHES BUILDS INTO THE UPPER
MISSISSIPPI VALLEY. THE HIGH WILL BUILD ACROSS THE UPPER GREAT LAKES
ON THURSDAY.

LSZ162-232230-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
1017 AM EDT SUN AUG 23 2015 /917 AM CDT SUN AUG 23 2015/

...GALE WARNING IN EFFECT FROM 2 PM EDT /1 PM CDT/ THIS AFTERNOON
THROUGH MONDAY EVENING...

.REST OF TODAY...SOUTHWEST WINDS 20 TO 30 KNOTS BECOMING WEST
GALES TO 35 KNOTS BY MID AFTERNOON. A SLIGHT CHANCE OF THUNDERSTORMS
THROUGH LATE MORNING. A CHANCE OF SHOWERS. WAVES 3 TO 5 FEET BUILDING
TO 5 TO 8 FEET.
.TONIGHT...WEST GALES TO 35 KNOTS. A CHANCE OF SHOWERS. WAVES
SUBSIDING TO 4 TO 7 FEET.
.MONDAY...NORTHWEST GALES TO 35 KNOTS. A CHANCE OF SHOWERS. WAVES
4 TO 7 FEET.
.MONDAY NIGHT...NORTHWEST WINDS 20 TO 30 KNOTS. A SLIGHT CHANCE
OF SHOWERS. WAVES SUBSIDING TO 2 TO 4 FEET.
.TUESDAY...NORTHWEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.TUESDAY NIGHT...NORTHWEST WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
.WEDNESDAY...NORTHWEST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
.THURSDAY...SOUTHWEST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.

$$

LSZ263-232230-
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-
1017 AM EDT SUN AUG 23 2015

...GALE WARNING IN EFFECT FROM 2 PM EDT THIS AFTERNOON THROUGH
MONDAY EVENING...

.REST OF TODAY...SOUTHWEST WINDS 20 TO 30 KNOTS INCREASING TO
GALES TO 35 KNOTS BY MID AFTERNOON. A SLIGHT CHANCE OF
THUNDERSTORMS THROUGH LATE MORNING. A SLIGHT CHANCE OF SHOWERS.
WAVES 3 TO 5 FEET BUILDING TO 6 TO 9 FEET.
.TONIGHT...WEST GALES TO 35 KNOTS. A CHANCE OF SHOWERS. WAVES
BUILDING TO 6 TO 10 FEET.
.MONDAY...WEST GALES TO 35 KNOTS VEERING NORTHWEST BY MID
AFTERNOON. A CHANCE OF SHOWERS. WAVES SUBSIDING TO 5 TO 8 FEET.
.MONDAY NIGHT...NORTHWEST GALES TO 35 KNOTS DIMINISHING TO 20 TO
30 KNOTS AFTER MIDNIGHT. A CHANCE OF SHOWERS. WAVES SUBSIDING TO
3 TO 5 FEET.
.TUESDAY...NORTHWEST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO 1 TO 3 FEET.
.TUESDAY NIGHT...NORTHWEST WINDS 10 TO 20 KNOTS. WAVES SUBSIDING
TO CALM TO 2 FEET.
.WEDNESDAY...NORTHWEST WINDS 10 TO 20 KNOTS BECOMING WEST 5 TO
15 KNOTS. WAVES CALM TO 2 FEET.
.THURSDAY...SOUTHWEST WINDS 5 TO 15 KNOTS. WAVES BUILDING TO 1 TO
3 FEET.

$$

LSZ264-232230-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
1017 AM EDT SUN AUG 23 2015

...GALE WARNING IN EFFECT FROM 2 PM EDT THIS AFTERNOON THROUGH
MONDAY EVENING...

.REST OF TODAY...SOUTHWEST WINDS 10 TO 20 KNOTS INCREASING TO
20 TO 30 KNOTS BY MID AFTERNOON. GALE FORCE GUSTS TO 35 KNOTS LATE.
A CHANCE OF THUNDERSTORMS THROUGH LATE MORNING. A CHANCE OF SHOWERS.
WAVES 3 TO 6 FEET BUILDING TO 5 TO 8 FEET.
.TONIGHT...WEST GALES TO 35 KNOTS DIMINISHING TO 20 TO 30 KNOTS
AFTER MIDNIGHT. A CHANCE OF SHOWERS. WAVES BUILDING TO 7 TO
10 FEET...THEN SUBSIDING TO 5 TO 8 FEET.
.MONDAY...WEST GALES TO 35 KNOTS BECOMING NORTHWEST 20 TO
30 KNOTS BY MID AFTERNOON. SHOWERS LIKELY THROUGH EARLY
AFTERNOON...THEN A CHANCE OF SHOWERS. WAVES SUBSIDING TO 3 TO 6
FEET.
.MONDAY NIGHT...NORTHWEST GALES TO 35 KNOTS DIMINISHING TO 20 TO
30 KNOTS AFTER MIDNIGHT. A CHANCE OF SHOWERS. WAVES BUILDING TO
4 TO 7 FEET...THEN SUBSIDING TO 3 TO 6 FEET.
.TUESDAY...NORTHWEST WINDS 20 TO 30 KNOTS. A CHANCE OF SHOWERS.
WAVES SUBSIDING TO 2 TO 4 FEET.
.TUESDAY NIGHT...NORTHWEST WINDS 15 TO 25 KNOTS. A CHANCE OF
SHOWERS. WAVES SUBSIDING TO 1 TO 3 FEET.
.WEDNESDAY...NORTHWEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS. WAVES SUBSIDING TO CALM TO 2 FEET.
.THURSDAY...SOUTHWEST WINDS 5 TO 15 KNOTS. WAVES BUILDING TO 1 TO
3 FEET.

$$

LSZ265-232230-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
1017 AM EDT SUN AUG 23 2015

...GALE WARNING IN EFFECT FROM LATE TONIGHT THROUGH MONDAY
EVENING...

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

$$

LSZ266-232230-
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-
1017 AM EDT SUN AUG 23 2015

.REST OF TODAY...SOUTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS BY MID AFTERNOON. SHOWERS THROUGH LATE MORNING...THEN A
SLIGHT CHANCE OF SHOWERS BY MID AFTERNOON. A CHANCE OF
THUNDERSTORMS. WAVES 3 TO 6 FEET SUBSIDING TO 2 TO 4 FEET...THEN
BUILDING TO 3 TO 5 FEET.
.TONIGHT...WEST WINDS 20 TO 30 KNOTS. A CHANCE OF SHOWERS. WAVES
BUILDING TO 4 TO 8 FEET.
.MONDAY...WEST WINDS 20 TO 30 KNOTS. A FEW GALE FORCE GUSTS TO
35 KNOTS. SHOWERS LIKELY. WAVES SUBSIDING TO 3 TO 6 FEET.
.MONDAY NIGHT...NORTHWEST WINDS 20 TO 30 KNOTS DIMINISHING TO
15 TO 25 KNOTS AFTER MIDNIGHT. A CHANCE OF SHOWERS THROUGH
MIDNIGHT...THEN SHOWERS LIKELY AFTER MIDNIGHT. WAVES 3 TO 6 FEET.
.TUESDAY...NORTHWEST WINDS 20 TO 30 KNOTS. SHOWERS LIKELY THROUGH
EARLY AFTERNOON...THEN A CHANCE OF SHOWERS. WAVES SUBSIDING TO 3 TO
5 FEET.
.TUESDAY NIGHT...NORTHWEST WINDS 20 TO 30 KNOTS. A CHANCE OF
SHOWERS. WAVES SUBSIDING TO 2 TO 4 FEET.
.WEDNESDAY...NORTHWEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS. WAVES SUBSIDING TO CALM TO 2 FEET.
.THURSDAY...WEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST. WAVES
BUILDING TO 1 TO 3 FEET.

$$

LSZ267-232230-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
1017 AM EDT SUN AUG 23 2015

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

$$
LSZ261-232230-
MAFOR 2315/
SUPERIOR WEST...GALE WARNING IN EFFECT...11540 11550 14650 11650
11750. CHANCE OF SHOWERS. WAVES 3 TO 6 FEET BUILDING TO 5 TO 8 FEET
THIS AFTERNOON. WAVES 5 TO 9 FEET TONIGHT AND MONDAY MORNING.

SUPERIOR NORTH CENTRAL...GALE WARNING IN EFFECT...11520 11530
11540 19550 11550 11650 12640 11646. CHANCE OF SHOWERS. CHANCE OF
THUNDERSTORMS LATE THIS MORNING. WAVES 3 TO 6 FEET THIS AFTERNOON.
WAVES 5 TO 9 FEET TONIGHT AND MONDAY MORNING.

SUPERIOR SOUTH CENTRAL...GALE WARNING IN EFFECT...11430 11520
14640 11646 11656. CHANCE OF SHOWERS AND THUNDERSTORMS THROUGH EARLY
THIS AFTERNOON. CHANCE OF SHOWERS AFTER MIDNIGHT TONIGHT. WAVES 1 TO
5 FEET THIS AFTERNOON. WAVES 3 TO 7 FEET TONIGHT AND MONDAY MORNING.

SUPERIOR EAST 11336 11430 11420 12620 13630. CHANCE OF SHOWERS.
CHANCE OF THUNDERSTORMS EARLY THIS AFTERNOON. SLIGHT CHANCE OF
THUNDERSTORMS LATE THIS AFTERNOON AND EVENING. WAVES 3 TO 5 FEET
THIS AFTERNOON. WAVES 2 TO 6 FEET TONIGHT AND MONDAY MORNING.

$$

ROLFSON



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