Great Lakes Forecast
Issued by NWS

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000
FZUS63 KMQT 200808
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
408 AM EDT SAT AUG 20 2016

FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE SUPERIOR

.SYNOPSIS...A LOW PRESSURE TROUGH OF 29.7 INCHES STRETCHING FROM
HUDSON BAY TO IOWA WILL LINGER THROUGH THIS MORNING. ANOTHER 29.7
INCH LOW FORMING ALONG THE TROUGH OVER CENTRAL WISCONSIN THIS
MORNING WILL SLIDE INTO EASTERN LAKE SUPERIOR THIS EVENING WHILE
DEEPENING TO 29.4 INCHES. THE LOW WILL SHIFT TO NEAR JAMES BAY
SUNDAY MORNING...AS THE TROUGH LIFTS TO THE NORTHEAST. A 30.1 INCH
HIGH PRESSURE OVER THE SOUTHERN PLAINS SUNDAY MORNING WILL BUILD TO
30.2 INCHES OVER THE OHIO VALLEY MONDAY AND REACH THE EAST COAST
TUESDAY. THIS WILL PLACE A RIDGE AVERAGING 30.0 INCHES ACROSS LAKE
SUPERIOR. A LOW PRESSURE OF 29.6 INCHES OVER THE NORTHERN PLAINS
TUESDAY AFTERNOON WILL EDGE EASTWARD THROUGH WEDNESDAY...WITH A 29.8
INCH TROUGH EXTENDING SOUTHWARD TO THE CENTRAL PLAINS.

LSZ162-201615-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
408 AM EDT SAT AUG 20 2016 /308 AM CDT SAT AUG 20 2016/

.EARLY THIS MORNING...NORTH WINDS 5 TO 15 KNOTS. A CHANCE OF
RAIN. WAVES CALM TO 2 FEET.
.TODAY...NORTHEAST WINDS 5 TO 15 KNOTS BECOMING NORTH 10 TO
20 KNOTS BY MID AFTERNOON. RAIN. WAVES CALM TO 2 FEET.
.TONIGHT...NORTH WINDS 15 TO 25 KNOTS. A CHANCE OF SHOWERS. WAVES
BUILDING TO 3 TO 6 FEET.
.SUNDAY...NORTHWEST WINDS 15 TO 25 KNOTS BECOMING WEST 10 TO
20 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO 1 TO 3 FEET.
.SUNDAY NIGHT...WEST WINDS 5 TO 15 KNOTS. WAVES SUBSIDING TO CALM
TO 2 FEET.
.MONDAY...SOUTH WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
.MONDAY NIGHT...SOUTH WINDS 10 TO 20 KNOTS VEERING SOUTHWEST
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.TUESDAY...SOUTH WINDS 10 TO 20 KNOTS BECOMING SOUTHWEST 15 TO
25 KNOTS. A CHANCE OF SHOWERS AND THUNDERSTORMS. WAVES BUILDING
TO 1 TO 3 FEET.
.WEDNESDAY...SOUTHWEST WINDS 10 TO 20 KNOTS VEERING WEST. A
CHANCE OF SHOWERS AND THUNDERSTORMS. WAVES SUBSIDING TO CALM TO
2 FEET.

$$

LSZ263-201615-
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-
408 AM EDT SAT AUG 20 2016

.EARLY THIS MORNING...NORTH WINDS 5 TO 15 KNOTS. A CHANCE OF
RAIN. WAVES CALM TO 2 FEET.
.TODAY...EAST WINDS 5 TO 15 KNOTS BECOMING NORTHEAST 10 TO
20 KNOTS BY MID AFTERNOON. RAIN. WAVES CALM TO 2 FEET.
.TONIGHT...NORTH WINDS 20 TO 30 KNOTS. A FEW GALE FORCE WIND GUSTS TO 35
KNOTS ARE POSSIBLE AFTER MIDNIGHT. SHOWERS THROUGH MIDNIGHT...THEN A
CHANCE OF SHOWERS. WAVES BUILDING TO 6 TO 9 FEET.
.SUNDAY...NORTH WINDS 15 TO 25 KNOTS BECOMING WEST 10 TO 20 KNOTS
BY MID AFTERNOON. ISOLATED SHOWERS THROUGH EARLY AFTERNOON. WAVES
SUBSIDING TO 1 TO 3 FEET.
.SUNDAY NIGHT...WEST WINDS 5 TO 15 KNOTS. WAVES SUBSIDING TO CALM
TO 2 FEET.
.MONDAY...SOUTHWEST WINDS 5 TO 15 KNOTS BECOMING SOUTH 10 TO
20 KNOTS BY MID AFTERNOON. WAVES CALM TO 2 FEET.
.MONDAY NIGHT...SOUTH WINDS 10 TO 20 KNOTS VEERING SOUTHWEST
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.TUESDAY...SOUTHWEST WINDS 10 TO 20 KNOTS BECOMING SOUTH 15 TO
25 KNOTS. A CHANCE OF SHOWERS AND THUNDERSTORMS. WAVES BUILDING
TO 1 TO 3 FEET.
.WEDNESDAY...SOUTHWEST WINDS 10 TO 20 KNOTS. A CHANCE OF SHOWERS
AND THUNDERSTORMS. WAVES SUBSIDING TO CALM TO 2 FEET.

$$

LSZ264-201615-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
408 AM EDT SAT AUG 20 2016

...GALE WARNING IN EFFECT FROM THIS EVENING THROUGH SUNDAY
AFTERNOON...

.EARLY THIS MORNING...NORTHEAST WINDS 5 TO 15 KNOTS. A SLIGHT
CHANCE OF RAIN. WAVES CALM TO 2 FEET.
.TODAY...EAST WINDS LESS THAN 10 KNOTS BECOMING NORTH 15 TO
25 KNOTS BY MID AFTERNOON. RAIN. WAVES BUILDING TO 2 TO 4 FEET.
.TONIGHT...NORTH GALES TO 40 KNOTS. SHOWERS. WAVES BUILDING TO
10 TO 14 FEET.
.SUNDAY...NORTH GALES TO 35 KNOTS BECOMING NORTHWEST 15 TO
25 KNOTS BY MID AFTERNOON. ISOLATED SHOWERS THROUGH EARLY
AFTERNOON. WAVES SUBSIDING TO 1 TO 3 FEET.
.SUNDAY NIGHT...NORTHWEST WINDS 10 TO 20 KNOTS BACKING WEST AFTER
MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.MONDAY...SOUTHWEST WINDS 10 TO 20 KNOTS BACKING SOUTH BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
.MONDAY NIGHT...SOUTH WINDS 10 TO 20 KNOTS VEERING SOUTHWEST
AFTER MIDNIGHT. WAVES BUILDING TO 1 TO 3 FEET.
.TUESDAY...SOUTHWEST WINDS 15 TO 25 KNOTS BACKING SOUTH. WAVES
SUBSIDING TO CALM TO 2 FEET...THEN BUILDING TO 1 TO 3 FEET.
.WEDNESDAY...SOUTHWEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS. A CHANCE OF SHOWERS AND THUNDERSTORMS. WAVES BUILDING
TO 2 TO 4 FEET...THEN SUBSIDING TO CALM TO 2 FEET.

$$

LSZ265-201615-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
408 AM EDT SAT AUG 20 2016

...GALE WARNING IN EFFECT FROM THIS EVENING THROUGH SUNDAY
AFTERNOON...

.EARLY THIS MORNING...WEST WINDS LESS THAN 10 KNOTS. A CHANCE OF
RAIN. WAVES CALM TO 2 FEET.
.TODAY...NORTH WINDS 5 TO 15 KNOTS BECOMING NORTHEAST 15 TO
25 KNOTS BY MID AFTERNOON. RAIN. WAVES BUILDING TO 3 TO 5 FEET.
.TONIGHT...NORTH GALES TO 40 KNOTS. SHOWERS. WAVES BUILDING TO
10 TO 14 FEET.
.SUNDAY...NORTHWEST GALES TO 35 KNOTS DIMINISHING TO 15 TO
25 KNOTS BY MID AFTERNOON. SCATTERED SHOWERS THROUGH EARLY
AFTERNOON. WAVES SUBSIDING TO 2 TO 4 FEET.
.SUNDAY NIGHT...WEST WINDS 10 TO 20 KNOTS. WAVES SUBSIDING TO
CALM TO 2 FEET.
.MONDAY...SOUTHWEST WINDS 10 TO 20 KNOTS BACKING SOUTH BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
.MONDAY NIGHT...SOUTH WINDS 10 TO 20 KNOTS VEERING SOUTHWEST
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.TUESDAY...SOUTHWEST WINDS 10 TO 20 KNOTS BECOMING SOUTH 15 TO
25 KNOTS. WAVES BUILDING TO 1 TO 3 FEET.
.WEDNESDAY...SOUTH WINDS 15 TO 25 KNOTS BECOMING SOUTHWEST 10 TO
20 KNOTS. A CHANCE OF SHOWERS AND THUNDERSTORMS. WAVES SUBSIDING
TO CALM TO 2 FEET.

$$

LSZ266-201615-
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-
408 AM EDT SAT AUG 20 2016

...GALE WARNING IN EFFECT FROM THIS EVENING THROUGH SUNDAY
AFTERNOON...

.EARLY THIS MORNING...NORTHWEST WINDS 5 TO 15 KNOTS. A CHANCE OF
RAIN. WAVES CALM TO 2 FEET.
.TODAY...NORTH WINDS 5 TO 15 KNOTS BECOMING NORTHEAST 15 TO
25 KNOTS BY MID AFTERNOON. RAIN. WAVES BUILDING TO 3 TO 5 FEET.
.TONIGHT...NORTH WINDS 20 TO 30 KNOTS INCREASING TO GALES TO
40 KNOTS AFTER MIDNIGHT. A FEW STORM FORCE GUSTS TO 50 KNOTS ARE
POSSIBLE AFTER MIDNIGHT. SHOWERS...WITH A SLIGHT CHANCE OF
THUNDERSTORMS THROUGH MIDNIGHT. WAVES BUILDING TO 12 TO 17 FEET.
.SUNDAY...NORTH GALES TO 40 KNOTS BECOMING NORTHWEST 20 TO
30 KNOTS BY MID AFTERNOON. SCATTERED SHOWERS. WAVES SUBSIDING TO
3 TO 5 FEET.
.SUNDAY NIGHT...NORTHWEST WINDS 10 TO 20 KNOTS BACKING WEST AFTER
MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET.
.MONDAY...SOUTHWEST WINDS 10 TO 20 KNOTS BACKING SOUTH BY MID
AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.MONDAY NIGHT...SOUTH WINDS 10 TO 20 KNOTS BECOMING SOUTHWEST
15 TO 25 KNOTS AFTER MIDNIGHT. WAVES BUILDING TO 2 TO 4 FEET.
.TUESDAY...SOUTH WINDS 15 TO 25 KNOTS. WAVES SUBSIDING TO 1 TO
3 FEET...THEN BUILDING TO 2 TO 4 FEET.
.WEDNESDAY...SOUTH WINDS 15 TO 25 KNOTS BECOMING SOUTHWEST 10 TO
20 KNOTS. A CHANCE OF SHOWERS AND THUNDERSTORMS. WAVES SUBSIDING
TO CALM TO 2 FEET.

$$

LSZ267-201615-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
408 AM EDT SAT AUG 20 2016

...GALE WARNING IN EFFECT FROM LATE TONIGHT THROUGH SUNDAY
AFTERNOON...

.EARLY THIS MORNING...NORTHWEST WINDS 5 TO 15 KNOTS. A CHANCE OF
RAIN. WAVES CALM TO 2 FEET.
.TODAY...NORTHEAST WINDS 5 TO 15 KNOTS BECOMING EAST 10 TO
20 KNOTS BY MID AFTERNOON. RAIN...WITH A SLIGHT CHANCE OF
THUNDERSTORMS BY MID AFTERNOON. WAVES CALM TO 2 FEET.
.TONIGHT...SOUTH WINDS 5 TO 15 KNOTS BECOMING NORTH GALES TO 35
KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF THUNDERSTORMS THROUGH
MIDNIGHT. SHOWERS. WAVES BUILDING TO 9 TO 12 FEET.
.SUNDAY...NORTH GALES TO 40 KNOTS BECOMING NORTHWEST 20 TO
30 KNOTS BY MID AFTERNOON. NUMEROUS SHOWERS THROUGH EARLY
AFTERNOON...THEN ISOLATED SHOWERS BY MID AFTERNOON. WAVES
BUILDING TO 10 TO 14 FEET...THEN SUBSIDING TO 3 TO 5 FEET.
.SUNDAY NIGHT...NORTHWEST WINDS 15 TO 25 KNOTS DIMINISHING TO
10 TO 20 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET.
.MONDAY...WEST WINDS 10 TO 20 KNOTS BACKING SOUTHWEST BY MID
AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.MONDAY NIGHT...SOUTH WINDS 15 TO 25 KNOTS VEERING SOUTHWEST
AFTER MIDNIGHT. WAVES BUILDING TO 2 TO 4 FEET.
.TUESDAY...SOUTHWEST WINDS 10 TO 20 KNOTS BECOMING SOUTH 15 TO
25 KNOTS. WAVES SUBSIDING TO CALM TO 2 FEET...THEN BUILDING TO
2 TO 4 FEET.
.WEDNESDAY...SOUTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS. A CHANCE OF SHOWERS AND THUNDERSTORMS. WAVES SUBSIDING
TO CALM TO 2 FEET.

$$

LSZ261-201615-
MAFOR 2009/
SUPERIOR WEST 11800 11100 12106 11826 11846 12840. CHANCE OF RAIN
THROUGH MID MORNING. CHANCE OF SHOWERS OVERNIGHT. WAVES 1 FOOT OR
LESS TODAY. WAVES 1 TO 3 FEET BUILDING TO 3 TO 6 FEET TONIGHT.

SUPERIOR NORTH CENTRAL...GALE WARNING IN EFFECT...11800 11200
11206 11116 11846 13856. CHANCE OF RAIN THIS MORNING. WAVES 2
FEET OR LESS TODAY. WAVES 3 TO 5 FEET BUILDING TO 8 TO 12 FEET
TONIGHT.

SUPERIOR SOUTH CENTRAL...GALE WARNING IN EFFECT...11700 11806
11816 11136 11146 12856 11866. CHANCE OF RAIN EARLY THIS MORNING.
WAVES 2 FEET OR LESS BUILDING TO 2 TO 4 FEET TODAY. WAVES 4 TO 7
FEET BUILDING TO 10 TO 14 FEET TONIGHT.

SUPERIOR EAST...GALE WARNING IN EFFECT...11700 11800 11106 11116
12126 11146 11856. CHANCE OF RAIN THIS MORNING. SLIGHT CHANCE OF
THUNDERSTORMS LATE THIS EVENING. WAVES 2 FEET OR LESS TODAY.
WAVES 1 TO 3 FEET BUILDING TO 6 TO 9 FEET TONIGHT.

$$

RJT



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