Great Lakes Forecast
Issued by NWS

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000
FZUS63 KMQT 232004
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
404 PM EDT SUN AUG 23 2015

FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE SUPERIOR

.SYNOPSIS...A COLD FRONT ASSOCIATED WITH A 29.4 INCH LOW PRESSURE TO
THE NORTH OF INTERNATIONAL FALLS WILL EXIT EASTERN LAKE SUPERIOR
THIS EVENING. AS THE LOW WEAKENS TO 29.7 INCHES WHILE DRIFTING TO
JAMES BAY BY TUESDAY AFTERNOON...HIGH PRESSURE OF 30.1 INCHES WILL
BUILD INTO THE NORTHERN PLAINS. THE LOW WILL LIFT INTO QUEBEC ON
WEDNESDAY...ALLOWING THE HIGH PRESSURE TO BUILD INTO THE UPPER
MISSISSIPPI VALLEY WEDNESDAY AND THEN THE GREAT LAKES ON THURSDAY.
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.

LSZ162-240415-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
404 PM EDT SUN AUG 23 2015 /304 PM CDT SUN AUG 23 2015/

...GALE WARNING IN EFFECT THROUGH MONDAY EVENING...

.LATE THIS AFTERNOON...WEST GALES TO 35 KNOTS. A CHANCE OF
SHOWERS. WAVES 5 TO 8 FEET.
.TONIGHT...WEST GALES TO 35 KNOTS. A SLIGHT CHANCE OF SHOWERS.
WAVES SUBSIDING TO 4 TO 7 FEET.
.MONDAY...NORTHWEST GALES TO 35 KNOTS DIMINISHING TO 20 TO
30 KNOTS BY MID AFTERNOON. A CHANCE OF SHOWERS. WAVES SUBSIDING
TO 3 TO 6 FEET.
.MONDAY NIGHT...NORTHWEST WINDS 20 TO 30 KNOTS DIMINISHING TO
15 TO 25 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF SHOWERS. WAVES
SUBSIDING TO 2 TO 4 FEET.
.TUESDAY...NORTHWEST WINDS 10 TO 20 KNOTS. A SLIGHT CHANCE OF
SHOWERS. 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 BACKING WEST BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
.WEDNESDAY NIGHT...WEST 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 5 TO 15 KNOTS. A CHANCE OF SHOWERS AND
THUNDERSTORMS. WAVES CALM TO 2 FEET.

$$

LSZ263-240415-
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-
404 PM EDT SUN AUG 23 2015

...GALE WARNING IN EFFECT THROUGH MONDAY EVENING...

.LATE THIS AFTERNOON...WEST GALES TO 35 KNOTS. A SLIGHT CHANCE OF
SHOWERS. WAVES 5 TO 9 FEET.
.TONIGHT...WEST WINDS 20 TO 30 KNOTS WITH GALE FORCE GUSTS TO 35
KNOTS. A CHANCE OF SHOWERS. WAVES BUILDING TO 6 TO 10 FEET.
.MONDAY...NORTHWEST GALES TO 35 KNOTS. A CHANCE OF SHOWERS. WAVES
SUBSIDING TO 4 TO 7 FEET.
.MONDAY NIGHT...NORTHWEST WINDS 20 TO 30 KNOTS WITH GALE FORCE GUSTS
TO 35 KNOTS. A CHANCE OF SHOWERS. WAVES SUBSIDING TO 3 TO 5 FEET.
.TUESDAY...NORTHWEST WINDS 20 TO 30 KNOTS DIMINISHING TO 10 TO
20 KNOTS BY MID AFTERNOON. A SLIGHT CHANCE OF SHOWERS. WAVES
SUBSIDING TO 1 TO 3 FEET.
.TUESDAY NIGHT...NORTHWEST WINDS 10 TO 20 KNOTS VEERING NORTH
AFTER MIDNIGHT. WAVES 1 TO 3 FEET.
.WEDNESDAY...NORTHWEST WINDS 10 TO 20 KNOTS BECOMING WEST 5 TO
15 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.WEDNESDAY NIGHT...WEST 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 5 TO 15 KNOTS. A CHANCE OF SHOWERS AND
THUNDERSTORMS. WAVES CALM TO 2 FEET.

$$

LSZ264-240415-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
404 PM EDT SUN AUG 23 2015

...GALE WARNING IN EFFECT THROUGH MONDAY EVENING...

.LATE THIS AFTERNOON...SOUTHWEST WINDS 15 TO 25 KNOTS. A SLIGHT
CHANCE OF SHOWERS. WAVES 3 TO 6 FEET BUILDING TO 5 TO 8 FEET.
.TONIGHT...WEST WINDS 20 TO 30 KNOTS INCREASING TO GALES TO
35 KNOTS AFTER MIDNIGHT. A CHANCE OF SHOWERS. WAVES BUILDING TO
7 TO 10 FEET...THEN SUBSIDING TO 5 TO 8 FEET.
.MONDAY...WEST WINDS 20 TO 30 KNOTS WITH GALE FORCE GUSTS TO 35 KNOTS
VEERING NORTHWEST BY MID AFTERNOON. SHOWERS LIKELY. WAVES SUBSIDING
TO 3 TO 6 FEET.
.MONDAY NIGHT...NORTHWEST WINDS 20 TO 30 KNOTS WITH GALE FORCE
GUSTS TO 35 KNOTS. A CHANCE OF SHOWERS. WAVES 3 TO 6 FEET.
.TUESDAY...NORTHWEST WINDS 20 TO 30 KNOTS. A CHANCE OF SHOWERS.
WAVES SUBSIDING TO 2 TO 4 FEET.
.TUESDAY NIGHT...NORTH WINDS 15 TO 25 KNOTS. A CHANCE OF SHOWERS.
WAVES 2 TO 4 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...WEST 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 DIMINISHING TO 5 TO
15 KNOTS. A CHANCE OF SHOWERS AND THUNDERSTORMS. WAVES CALM TO
2 FEET.

$$

LSZ265-240415-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
404 PM EDT SUN AUG 23 2015

...GALE WARNING IN EFFECT FROM 2 AM EDT MONDAY THROUGH MONDAY
EVENING...

.LATE THIS AFTERNOON...WEST WINDS 15 TO 25 KNOTS. A SLIGHT CHANCE
OF SHOWERS. WAVES 1 TO 3 FEET BUILDING TO 2 TO 4 FEET.
.TONIGHT...WEST WINDS 20 TO 30 KNOTS WITH GALE FORCE GUSTS TO
35 KNOTS. A CHANCE OF SHOWERS. WAVES BUILDING TO 3 TO 6 FEET.
.MONDAY...WEST GALES TO 35 KNOTS. A CHANCE OF SHOWERS THROUGH
EARLY AFTERNOON...THEN SHOWERS LIKELY BY MID AFTERNOON. WAVES
BUILDING TO 4 TO 7 FEET...THEN SUBSIDING TO 3 TO 6 FEET.
.MONDAY NIGHT...NORTHWEST WINDS 20 TO 30 KNOTS WITH GALE FORCE
GUSTS TO 35 KNOTS. A CHANCE OF SHOWERS. WAVES SUBSIDING TO 3 TO 5
FEET.
.TUESDAY...NORTHWEST WINDS 20 TO 30 KNOTS. A CHANCE OF SHOWERS.
WAVES 3 TO 6 FEET.
.TUESDAY NIGHT...NORTHWEST WINDS 15 TO 25 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 BY MID AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.WEDNESDAY NIGHT...NORTHWEST WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
.THURSDAY...WEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST. WAVES
CALM TO 2 FEET.
.FRIDAY...SOUTHWEST WINDS 5 TO 15 KNOTS VEERING WEST. A CHANCE OF
SHOWERS AND THUNDERSTORMS. WAVES CALM TO 2 FEET.

$$

LSZ266-240415-
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-
404 PM EDT SUN AUG 23 2015

.LATE THIS AFTERNOON...WEST WINDS 10 TO 20 KNOTS. A SLIGHT CHANCE
OF SHOWERS. WAVES 2 TO 4 FEET BUILDING TO 3 TO 5 FEET.
.TONIGHT...WEST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO 30 KNOTS
AFTER MIDNIGHT. A CHANCE OF SHOWERS. WAVES BUILDING TO 4 TO
8 FEET.
.MONDAY...WEST WINDS 20 TO 30 KNOTS WITH A FEW GALE FORCE GUSTS
TO 35 KNOTS BY MID AFTERNOON. SHOWERS LIKELY. WAVES SUBSIDING TO 3
TO 6 FEET... THEN BUILDING TO 4 TO 7 FEET.
.MONDAY NIGHT...NORTHWEST WINDS 20 TO 30 KNOTS. A CHANCE OF
SHOWERS THROUGH MIDNIGHT...THEN SHOWERS LIKELY AFTER MIDNIGHT.
WAVES SUBSIDING TO 3 TO 6 FEET.
.TUESDAY...NORTHWEST WINDS 20 TO 30 KNOTS. SHOWERS LIKELY THROUGH
EARLY AFTERNOON...THEN A CHANCE OF SHOWERS BY MID AFTERNOON.
WAVES 3 TO 6 FEET.
.TUESDAY NIGHT...NORTHWEST WINDS 20 TO 30 KNOTS. A 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 1 TO 3 FEET.
.WEDNESDAY NIGHT...NORTHWEST WINDS 10 TO 20 KNOTS DIMINISHING TO
5 TO 15 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.THURSDAY...WEST WINDS 5 TO 15 KNOTS BACKING SOUTH. WAVES
BUILDING TO 1 TO 3 FEET...THEN SUBSIDING TO CALM TO 2 FEET.
.FRIDAY...SOUTHWEST WINDS 5 TO 15 KNOTS VEERING WEST. A CHANCE OF
SHOWERS AND THUNDERSTORMS. WAVES CALM TO 2 FEET.

$$

LSZ267-240415-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
404 PM EDT SUN AUG 23 2015

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

$$

LSZ261-240415-
MAFOR 2321/
SUPERIOR WEST...GALE WARNING IN EFFECT...14650 11650 12750 11740.
CHANCE OF SHOWERS EARLY THIS EVENING AND MONDAY. WAVES 5 TO 9
FEET.

SUPERIOR NORTH CENTRAL...GALE WARNING IN EFFECT...11540 11550
11650 12640 11646 12746. CHANCE OF SHOWERS OVERNIGHT. WAVES 4 TO
9 FEET.

SUPERIOR SOUTH CENTRAL...GALE WARNING IN EFFECT...11630 13640
11646 11650 11656 11646. CHANCE OF SHOWERS OVERNIGHT THROUGH EARLY
MONDAY AFTERNOON. WAVES 1 TO 3 FEET BUILDING TO 4 TO 7 FEET TONIGHT
AND MONDAY.

SUPERIOR EAST 11430 11620 12520 11630 13636. CHANCE OF SHOWERS
TONIGHT THROUGH LATE MONDAY MORNING. WAVES 2 TO 6 FEET.

$$

JS


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