Great Lakes Forecast
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230
FZUS63 KMQT 250754
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
354 AM EDT SUN SEP 25 2016

FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE SUPERIOR

.SYNOPSIS...A 30.3 INCH HIGH PRESSURE SYSTEM OVER EASTERN ONTARIO
WILL DRIFT EASTWARD TO CENTRAL QUEBEC TODAY AS A 29.6 INCH LOW
PRESSURE NEAR LAKE WINNIPEG THIS MORNING MOVES TO NORTHWEST ONTARIO
BY THIS EVENING. EXPECT THIS LOW TO THEN SHIFT SOUTHEASTWARD ACROSS
ONTARIO ON MONDAY AND MOVE INTO NORTHERN LAKE SUPERIOR BY MONDAY
EVENING WHILE DEEPENING TO 29.4 INCHES. THE LOW WILL THEN SLOWLY
DRIFT TO EASTERN LAKE SUPERIOR ON TUESDAY AND WEAKEN TO 29.6 INCHES
BY TUESDAY EVENING. THE LOW WILL CONTINUE TO WEAKEN TO 29.9 INCHES
WEDNESDAY AFTERNOON AS IT MOVES TO LOWER MICHIGAN. HIGH PRESSURE OF
30.3 INCHES WILL SETTLE ACROSS THE UPPER MISSISSIPPI VALLEY AND UPPER
GREAT LAKES FOR THURSDAY.

LSZ162-251600-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
354 AM EDT SUN SEP 25 2016 /254 AM CDT SUN SEP 25 2016/

...GALE WATCH IN EFFECT FROM MONDAY MORNING THROUGH LATE MONDAY
NIGHT...

.EARLY THIS MORNING...SOUTHEAST WINDS 5 TO 15 KNOTS. SCATTERED
SHOWERS AND ISOLATED THUNDERSTORMS. WAVES 1 TO 3 FEET.
.TODAY...SOUTHEAST WINDS 10 TO 20 KNOTS VEERING SOUTHWEST BY MID
AFTERNOON. NUMEROUS SHOWERS THROUGH EARLY AFTERNOON. ISOLATED
THUNDERSTORMS. SCATTERED SHOWERS BY MID AFTERNOON. WAVES 1 TO
3 FEET.
.TONIGHT...SOUTHWEST WINDS 15 TO 25 KNOTS VEERING WEST AFTER
MIDNIGHT. SCATTERED SHOWERS. WAVES BUILDING TO 3 TO 6 FEET.
.MONDAY...WEST GALES TO 35 KNOTS BECOMING NORTHWEST GALES TO
40 KNOTS BY MID AFTERNOON. A SLIGHT CHANCE OF THUNDERSTORMS
THROUGH EARLY AFTERNOON. SHOWERS LIKELY. WAVES BUILDING 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 6 FEET.
.TUESDAY...NORTHWEST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS BY MID AFTERNOON. A CHANCE OF SHOWERS. WAVES SUBSIDING
TO 2 TO 4 FEET.
.TUESDAY NIGHT...NORTH WINDS 10 TO 20 KNOTS. WAVES 2 TO 4 FEET.
.WEDNESDAY...NORTH WINDS 5 TO 15 KNOTS BACKING WEST. WAVES
SUBSIDING TO CALM TO 2 FEET.
.THURSDAY...WEST WINDS 5 TO 15 KNOTS BACKING SOUTHEAST. WAVES
CALM TO 2 FEET.

$$

LSZ263-251600-
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-
354 AM EDT SUN SEP 25 2016

...GALE WATCH IN EFFECT FROM MONDAY MORNING THROUGH LATE MONDAY
NIGHT...

.EARLY THIS MORNING...SOUTHEAST WINDS 5 TO 15 KNOTS. ISOLATED
SHOWERS AND THUNDERSTORMS. WAVES 1 TO 3 FEET.
.TODAY...SOUTHEAST WINDS 10 TO 20 KNOTS BECOMING SOUTH 20 TO
30 KNOTS BY MID AFTERNOON. SCATTERED SHOWERS THROUGH EARLY
AFTERNOON. ISOLATED THUNDERSTORMS. NUMEROUS SHOWERS BY MID
AFTERNOON. WAVES BUILDING TO 4 TO 7 FEET.
.TONIGHT...SOUTHWEST WINDS 15 TO 25 KNOTS BECOMING WEST 20 TO
30 KNOTS AFTER MIDNIGHT. ISOLATED THUNDERSTORMS THROUGH MIDNIGHT.
SCATTERED SHOWERS. WAVES SUBSIDING TO 3 TO 5 FEET...THEN BUILDING
TO 5 TO 8 FEET.
.MONDAY...WEST WINDS 20 TO 30 KNOTS BECOMING NORTHWEST GALES TO
40 KNOTS BY MID AFTERNOON. SHOWERS AND A SLIGHT CHANCE OF
THUNDERSTORMS. WAVES BUILDING TO 7 TO 10 FEET.
.MONDAY NIGHT...NORTHWEST GALES TO 40 KNOTS. SHOWERS LIKELY.
WAVES SUBSIDING TO 5 TO 8 FEET.
.TUESDAY...NORTHWEST WINDS 20 TO 30 KNOTS. SHOWERS LIKELY THROUGH
EARLY AFTERNOON...THEN A CHANCE OF SHOWERS BY MID AFTERNOON.
WAVES SUBSIDING TO 4 TO 7 FEET.
.TUESDAY NIGHT...NORTH WINDS 15 TO 25 KNOTS. A CHANCE OF SHOWERS.
WAVES SUBSIDING TO 2 TO 4 FEET.
.WEDNESDAY...NORTH WINDS 5 TO 15 KNOTS BACKING WEST. WAVES
SUBSIDING TO CALM TO 2 FEET.
.THURSDAY...WEST WINDS 5 TO 15 KNOTS BACKING SOUTH. WAVES CALM TO
2 FEET.

$$

LSZ264-251600-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
354 AM EDT SUN SEP 25 2016

...GALE WATCH IN EFFECT FROM MONDAY AFTERNOON THROUGH LATE MONDAY
NIGHT...

.EARLY THIS MORNING...SOUTH WINDS 10 TO 20 KNOTS. WAVES 2 TO
4 FEET.
.TODAY...SOUTHEAST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO
30 KNOTS BY MID AFTERNOON. SCATTERED SHOWERS THROUGH EARLY
AFTERNOON. ISOLATED THUNDERSTORMS. PERIODS OF SHOWERS BY MID
AFTERNOON. WAVES BUILDING TO 6 TO 10 FEET.
.TONIGHT...SOUTH WINDS 20 TO 30 KNOTS BECOMING SOUTHWEST 15 TO
25 KNOTS AFTER MIDNIGHT. NUMEROUS SHOWERS AND ISOLATED
THUNDERSTORMS THROUGH MIDNIGHT...THEN SCATTERED SHOWERS AFTER
MIDNIGHT. WAVES SUBSIDING TO 3 TO 5 FEET...THEN BUILDING TO 4 TO
7 FEET.
.MONDAY...SOUTHWEST WINDS 15 TO 25 KNOTS BECOMING WEST GALES TO
35 KNOTS BY MID AFTERNOON. A CHANCE OF SHOWERS THROUGH EARLY
AFTERNOON...THEN SHOWERS LIKELY AND A SLIGHT CHANCE OF
THUNDERSTORMS BY MID AFTERNOON. WAVES BUILDING TO 6 TO 9 FEET.
.MONDAY NIGHT...NORTHWEST GALES TO 35 KNOTS. SHOWERS. WAVES
BUILDING TO 6 TO 10 FEET.
.TUESDAY...NORTHWEST WINDS 20 TO 30 KNOTS VEERING NORTH BY MID
AFTERNOON. SHOWERS LIKELY. WAVES 6 TO 9 FEET.
.TUESDAY NIGHT...NORTH 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...NORTH WINDS 10 TO 20 KNOTS BACKING NORTHWEST. WAVES
SUBSIDING TO CALM TO 2 FEET.
.THURSDAY...WEST WINDS 10 TO 20 KNOTS BECOMING SOUTH 5 TO
15 KNOTS. WAVES CALM TO 2 FEET.

$$

LSZ265-251600-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
354 AM EDT SUN SEP 25 2016

...GALE WATCH IN EFFECT FROM MONDAY AFTERNOON THROUGH LATE MONDAY
NIGHT...

.EARLY THIS MORNING...SOUTH WINDS 10 TO 20 KNOTS. WAVES 2 TO
4 FEET.
.TODAY...SOUTHEAST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO
30 KNOTS BY MID AFTERNOON. SCATTERED SHOWERS THROUGH EARLY
AFTERNOON. ISOLATED THUNDERSTORMS. PERIODS OF SHOWERS BY MID
AFTERNOON. WAVES BUILDING TO 4 TO 8 FEET.
.TONIGHT...SOUTH WINDS 20 TO 30 KNOTS BECOMING SOUTHWEST 15 TO
25 KNOTS AFTER MIDNIGHT. NUMEROUS SHOWERS AND ISOLATED
THUNDERSTORMS THROUGH MIDNIGHT...THEN SCATTERED SHOWERS AFTER
MIDNIGHT. WAVES SUBSIDING TO 2 TO 4 FEET...THEN BUILDING TO 3 TO
5 FEET.
.MONDAY...SOUTHWEST WINDS 20 TO 30 KNOTS BECOMING WEST GALES TO
35 KNOTS BY MID AFTERNOON. SHOWERS. A SLIGHT CHANCE OF
THUNDERSTORMS BY MID AFTERNOON. WAVES BUILDING TO 3 TO 6 FEET.
.MONDAY NIGHT...WEST GALES TO 40 KNOTS BECOMING NORTHWEST GALES
TO 35 KNOTS AFTER MIDNIGHT. SHOWERS. WAVES BUILDING TO 6 TO
9 FEET.
.TUESDAY...NORTHWEST WINDS 20 TO 30 KNOTS. SHOWERS. WAVES
SUBSIDING TO 5 TO 8 FEET...THEN BUILDING TO 6 TO 9 FEET.
.TUESDAY NIGHT...NORTH WINDS 15 TO 25 KNOTS. A CHANCE OF SHOWERS.
WAVES SUBSIDING TO 3 TO 5 FEET.
.WEDNESDAY...NORTH WINDS 10 TO 20 KNOTS BACKING NORTHWEST. WAVES
SUBSIDING TO CALM TO 2 FEET.
.THURSDAY...NORTHWEST WINDS 10 TO 20 KNOTS BECOMING SOUTH 5 TO
15 KNOTS. WAVES CALM TO 2 FEET.

$$

LSZ266-251600-
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-
354 AM EDT SUN SEP 25 2016

...GALE WATCH IN EFFECT FROM MONDAY AFTERNOON THROUGH LATE MONDAY
NIGHT...

.EARLY THIS MORNING...SOUTH WINDS 10 TO 20 KNOTS. WAVES 2 TO
4 FEET.
.TODAY...SOUTH WINDS 15 TO 25 KNOTS BECOMING SOUTHEAST 20 TO
30 KNOTS BY MID AFTERNOON. SCATTERED SHOWERS AND ISOLATED
THUNDERSTORMS. WAVES BUILDING TO 6 TO 9 FEET.
.TONIGHT...SOUTH WINDS 20 TO 30 KNOTS BECOMING SOUTHWEST 15 TO
25 KNOTS AFTER MIDNIGHT. A FEW GALE FORCE GUSTS TO 35 KNOTS IN THE
EVENING. NUMEROUS SHOWERS AND ISOLATED THUNDERSTORMS THROUGH
MIDNIGHT...THEN SCATTERED SHOWERS AFTER MIDNIGHT. WAVES SUBSIDING TO
3 TO 6 FEET.
.MONDAY...SOUTHWEST WINDS 20 TO 30 KNOTS BECOMING WEST GALES TO
35 KNOTS BY MID AFTERNOON. A CHANCE OF SHOWERS THROUGH EARLY
AFTERNOON...THEN SHOWERS LIKELY AND A SLIGHT CHANCE OF
THUNDERSTORMS BY MID AFTERNOON. WAVES BUILDING TO 4 TO 8 FEET.
.MONDAY NIGHT...WEST GALES TO 35 KNOTS BECOMING NORTHWEST 20 TO
30 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF THUNDERSTORMS THROUGH
MIDNIGHT. SHOWERS. WAVES BUILDING TO 8 TO 12 FEET.
.TUESDAY...NORTHWEST WINDS 20 TO 30 KNOTS. SHOWERS LIKELY. WAVES
SUBSIDING TO 6 TO 9 FEET.
.TUESDAY NIGHT...NORTH WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS AFTER MIDNIGHT. A CHANCE OF SHOWERS. WAVES SUBSIDING TO
3 TO 5 FEET.
.WEDNESDAY...NORTH WINDS 10 TO 20 KNOTS. WAVES SUBSIDING TO CALM
TO 2 FEET.
.THURSDAY...NORTHWEST WINDS 10 TO 20 KNOTS BECOMING SOUTH 5 TO
15 KNOTS. WAVES CALM TO 2 FEET.

$$

LSZ267-251600-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
354 AM EDT SUN SEP 25 2016

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

.EARLY THIS MORNING...SOUTH WINDS 10 TO 20 KNOTS. WAVES CALM TO
2 FEET BUILDING TO 1 TO 3 FEET.
.TODAY...SOUTHEAST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO
30 KNOTS BY MID AFTERNOON. NUMEROUS SHOWERS AND ISOLATED
THUNDERSTORMS BY MID AFTERNOON. WAVES BUILDING TO 3 TO 5 FEET.
.TONIGHT...SOUTHEAST GALES TO 35 KNOTS BECOMING SOUTH 20 TO
30 KNOTS AFTER MIDNIGHT. PERIODS OF SHOWERS AND ISOLATED
THUNDERSTORMS. WAVES BUILDING TO 4 TO 7 FEET...THEN SUBSIDING TO
3 TO 5 FEET.
.MONDAY...SOUTHWEST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO
30 KNOTS BY MID AFTERNOON. SHOWERS LIKELY. WAVES SUBSIDING TO
2 TO 4 FEET...THEN BUILDING TO 7 TO 10 FEET.
.MONDAY NIGHT...WEST WINDS 20 TO 30 KNOTS. A SLIGHT CHANCE OF
THUNDERSTORMS THROUGH MIDNIGHT. SHOWERS LIKELY. WAVES BUILDING TO
8 TO 12 FEET.
.TUESDAY...NORTHWEST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS BY MID AFTERNOON. SHOWERS THROUGH EARLY AFTERNOON...THEN
A CHANCE OF SHOWERS BY MID AFTERNOON. WAVES SUBSIDING TO 5 TO
8 FEET.
.TUESDAY NIGHT...NORTH WINDS 10 TO 20 KNOTS BECOMING NORTHEAST
15 TO 25 KNOTS AFTER MIDNIGHT. A CHANCE OF SHOWERS. WAVES
SUBSIDING TO 3 TO 5 FEET.
.WEDNESDAY...NORTH WINDS 10 TO 20 KNOTS. WAVES SUBSIDING TO CALM
TO 2 FEET.
.THURSDAY...NORTHWEST WINDS 10 TO 20 KNOTS. WAVES CALM TO 2 FEET.

$$

LSZ261-251600-
MAFOR 2509/
SUPERIOR WEST 11310 11320 11326 11426 12520 11530 11640. SCATTERED
SHOWERS THROUGH MID MORNING. ISOLATED THUNDERSTORMS FROM LATE MORNING
THROUGH EARLY EVENING. SCATTERED SHOWERS EARLY EVENING AND OVERNIGHT.
WAVES 1 TO 4 FEET TODAY BUILDING TO 3 TO 6 FEET TONIGHT.

SUPERIOR NORTH CENTRAL 11420 11330 11340 12346 11446 11420 11530.
SCATTERED SHOWERS WITH ISOLATED THUNDERSTORMS EARLY THIS AFTERNOON.
ISOLATED THUNDERSTORMS LATE TODAY THROUGH LATE EVENING. SCATTERED
SHOWERS LATE IN THE EVENING AND OVERNIGHT. WAVES 2 TO 4 FEET
BUILDING TO 7 TO 10 FEET TODAY. WAVES 7 TO 10 FEET SUBSIDING TO 3 TO
5 FEET TONIGHT.

SUPERIOR SOUTH CENTRAL 11420 11430 11330 12346 11446 11430 11520.
SCATTERED SHOWERS WITH ISOLATED THUNDERSTORMS EARLY THIS
AFTERNOON. ISOLATED THUNDERSTORMS LATE TODAY THROUGH THIS EVENING.
SCATTERED SHOWERS OVERNIGHT. WAVES 2 TO 4 FEET BUILDING TO 4 TO 7
FEET TODAY. WAVES 4 TO 7 FEET SUBSIDING TO 3 TO 5 FEET TONIGHT.

SUPERIOR EAST...GALE WARNING IN EFFECT...11420 11320 11330 11340
11346 12356 11446. SCATTERED SHOWERS WITH ISOLATED THUNDERSTORMS
LATE TODAY. ISOLATED THUNDERSTORMS TONIGHT. WAVES 2 TO 4 FEET
BUILDING TO 3 TO 6 FEET TODAY. WAVES 4 TO 7 FEET TONIGHT.

$$

07



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