Great Lakes Forecast
Issued by NWS

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000
FZUS63 KMQT 270144
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
944 PM EDT SUN JUL 26 2015

FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE SUPERIOR

.SYNOPSIS...30.0 INCH HIGH PRESSURE OVER LOWER MICHIGAN WILL KEEP A
RIDGE AVERAGING 29.9 INCHES ACROSS LAKE SUPERIOR THROUGH EARLY
TUESDAY. 29.4 INCH LOW PRESSURE OVER SOUTHERN SASKATCHEWAN TUESDAY
MORNING WILL RACE ACROSS MANITOBA TUESDAY NIGHT...AND ACROSS ONTARIO
TO HUDSON BAY WHILE DEEPENING TO 29.2 INCHES BY WEDNESDAY NIGHT.
LOOK FOR THIS AREA OF LOW PRESSURE TO REMAIN ACROSS HUDSON BAY
THROUGH AT LEAST FRIDAY. THE RESULT WILL BE A TROUGH EXTENDING DOWN
THROUGH LAKE SUPERIOR AVERAGING 29.7 INCHES TUESDAY NIGHT AND
WEDNESDAY. THE TROUGH WILL SHIFT TO THE NEW ENGLAND STATES
THURSDAY...ALLOWING A 29.9 INCH RIDGE TO BUILD INTO THE UPPER GREAT
LAKES THURSDAY. IT WILL QUICKLY BE REPLACED BY A WEAK 29.8 INCH
TROUGH THURSDAY NIGHT INTO FRIDAY ROTATING AROUND THE HUDSON BAY LOW.

LSZ162-270945-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
944 PM EDT SUN JUL 26 2015

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

$$

LSZ263-270945-
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-
944 PM EDT SUN JUL 26 2015

.REST OF TONIGHT...SOUTH WINDS 5 TO 15 KNOTS VEERING SOUTHWEST
AFTER MIDNIGHT. PATCHY FOG BY LATE EVENING. WAVES CALM TO 2 FEET.
.MONDAY...SOUTHWEST WINDS LESS THAN 10 KNOTS BECOMING EAST 5 TO
15 KNOTS BY MID AFTERNOON. WAVES CALM TO 2 FEET.
.MONDAY NIGHT...EAST WINDS 5 TO 15 KNOTS VEERING SOUTHEAST AFTER
MIDNIGHT. WAVES CALM TO 2 FEET.
.TUESDAY...SOUTHEAST WINDS 5 TO 15 KNOTS VEERING SOUTH BY MID
AFTERNOON. A CHANCE OF SHOWERS AND THUNDERSTORMS. WAVES CALM TO
2 FEET.
.TUESDAY NIGHT...SOUTH WINDS 5 TO 15 KNOTS BECOMING SOUTHWEST
10 TO 20 KNOTS AFTER MIDNIGHT. A CHANCE OF SHOWERS AND
THUNDERSTORMS. WAVES BUILDING TO 1 TO 3 FEET.
.WEDNESDAY...SOUTHWEST WINDS 20 TO 30 KNOTS VEERING WEST BY MID
AFTERNOON. WAVES BUILDING TO 3 TO 5 FEET.
.WEDNESDAY NIGHT...WEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET.
.THURSDAY...WEST WINDS 10 TO 20 KNOTS. WAVES SUBSIDING TO CALM TO
2 FEET.
.FRIDAY...WEST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.

$$

LSZ264-270945-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
944 PM EDT SUN JUL 26 2015

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

$$

LSZ265-270945-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
944 PM EDT SUN JUL 26 2015

.REST OF TONIGHT...SOUTHEAST WINDS 5 TO 15 KNOTS BECOMING SOUTH
LESS THAN 10 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.MONDAY...SOUTHWEST WINDS LESS THAN 10 KNOTS BECOMING EAST 5 TO
15 KNOTS BY MID AFTERNOON. WAVES CALM TO 2 FEET.
.MONDAY NIGHT...SOUTHEAST WINDS 5 TO 15 KNOTS VEERING SOUTH AFTER
MIDNIGHT. WAVES CALM TO 2 FEET.
.TUESDAY...SOUTHEAST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS BY MID AFTERNOON. A SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS BY MID AFTERNOON. WAVES BUILDING TO 1 TO 3 FEET.
.TUESDAY NIGHT...SOUTH WINDS 10 TO 20 KNOTS. A CHANCE OF SHOWERS
AND THUNDERSTORMS. WAVES SUBSIDING TO CALM TO 2 FEET.
.WEDNESDAY...SOUTHWEST WINDS 15 TO 25 KNOTS VEERING WEST BY MID
AFTERNOON. WAVES BUILDING TO 1 TO 3 FEET.
.WEDNESDAY NIGHT...WEST WINDS 15 TO 25 KNOTS. WAVES 1 TO 3 FEET.
.THURSDAY...WEST WINDS 10 TO 20 KNOTS. WAVES SUBSIDING TO CALM TO
2 FEET.
.FRIDAY...WEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO 15 KNOTS.
WAVES CALM TO 2 FEET.

$$

LSZ266-270945-
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-
944 PM EDT SUN JUL 26 2015

.REST OF TONIGHT...SOUTH WINDS LESS THAN 10 KNOTS. PATCHY FOG.
WAVES CALM TO 2 FEET.
.MONDAY...SOUTH WINDS LESS THAN 10 KNOTS BACKING SOUTHEAST BY MID
AFTERNOON. PATCHY FOG. WAVES CALM TO 2 FEET.
.MONDAY NIGHT...SOUTHEAST WINDS 5 TO 15 KNOTS VEERING SOUTH AFTER
MIDNIGHT. PATCHY FOG. WAVES CALM TO 2 FEET.
.TUESDAY...SOUTHEAST WINDS 10 TO 20 KNOTS. A SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS BY MID AFTERNOON. WAVES BUILDING TO
1 TO 3 FEET.
.TUESDAY NIGHT...SOUTH WINDS 10 TO 20 KNOTS. A CHANCE OF SHOWERS
AND THUNDERSTORMS. WAVES BUILDING TO 2 TO 4 FEET...THEN SUBSIDING
TO 1 TO 3 FEET.
.WEDNESDAY...SOUTHWEST WINDS 15 TO 25 KNOTS VEERING WEST BY MID
AFTERNOON. WAVES BUILDING TO 3 TO 6 FEET.
.WEDNESDAY NIGHT...WEST WINDS 15 TO 25 KNOTS. WAVES SUBSIDING TO
2 TO 4 FEET.
.THURSDAY...WEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS. WAVES SUBSIDING TO CALM TO 2 FEET.
.FRIDAY...WEST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.

$$

LSZ267-270945-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
944 PM EDT SUN JUL 26 2015

.REST OF TONIGHT...NORTH WINDS LESS THAN 10 KNOTS VEERING EAST
AFTER MIDNIGHT. PATCHY FOG. WAVES CALM TO 2 FEET.
.MONDAY...SOUTHEAST WINDS LESS THAN 10 KNOTS VEERING SOUTH BY MID
AFTERNOON. PATCHY FOG. WAVES CALM TO 2 FEET.
.MONDAY NIGHT...EAST WINDS LESS THAN 10 KNOTS BECOMING SOUTHEAST
5 TO 15 KNOTS AFTER MIDNIGHT. PATCHY FOG. WAVES CALM TO 2 FEET.
.TUESDAY...SOUTHEAST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS BY MID AFTERNOON. WAVES CALM TO 2 FEET.
.TUESDAY NIGHT...SOUTH WINDS 10 TO 20 KNOTS. A CHANCE OF SHOWERS
AND THUNDERSTORMS...THEN SHOWERS AND THUNDERSTORMS LIKELY AFTER
MIDNIGHT. WAVES BUILDING TO 1 TO 3 FEET.
.WEDNESDAY...SOUTHWEST 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.
.WEDNESDAY NIGHT...WEST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS AFTER MIDNIGHT. WAVES BUILDING TO 3 TO 5 FEET...THEN
SUBSIDING TO 2 TO 4 FEET.
.THURSDAY...WEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS. WAVES SUBSIDING TO CALM TO 2 FEET.
.FRIDAY...WEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO 15 KNOTS.
WAVES CALM TO 2 FEET.

$$
LSZ261-270945-
MAFOR 2703/
SUPERIOR WEST 14500 11400 11300 11200 11210. WAVES 1 FOOT OR
LESS.

SUPERIOR NORTH CENTRAL 12400 13500 11300 11400 11300. PATCHY FOG
OVERNIGHT AND LATE MONDAY EVENING. WAVES 1 FOOT OR LESS.

SUPERIOR SOUTH CENTRAL 11300 11400 12500 11300 11200 12300. WAVES
1 FOOT OR LESS.

SUPERIOR EAST 11500 14300 12400 11300. PATCHY FOG OVERNIGHT THROUGH
MONDAY EVENING. WAVES 1 FOOT OR LESS.

$$

JS


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