Great Lakes Forecast
Issued by NWS

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000
FZUS63 KMQT 202003
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
403 PM EDT SAT AUG 20 2016

FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE SUPERIOR

.SYNOPSIS...A LOW PRESSURE OF 29.4 INCHES OVER NORTHERN LAKE MICHIGAN
WILL WILL MOVE OVER JAMES BAY SUNDAY MORNING. 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.
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. BY THURSDAY...THE
LOW WILL REACH NORTHERN QUEBEC WITH THE TROUGH CROSSING THE UPPER
GREAT LAKES.

LSZ162-210415-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
403 PM EDT SAT AUG 20 2016 /303 PM CDT SAT AUG 20 2016/

.LATE THIS AFTERNOON...NORTH WINDS 5 TO 15 KNOTS. SHOWERS. WAVES
CALM TO 2 FEET.
.TONIGHT...NORTH WINDS 15 TO 25 KNOTS. SHOWERS THROUGH MIDNIGHT...
THEN A SLIGHT CHANCE OF SHOWERS AFTER MIDNIGHT. WAVES BUILDING TO
3 TO 5 FEET.
.SUNDAY...NORTHWEST WINDS 10 TO 20 KNOTS BACKING WEST BY MID
AFTERNOON. WAVES SUBSIDING TO 1 TO 3 FEET.
.SUNDAY NIGHT...WEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST AFTER
MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.MONDAY...SOUTHWEST WINDS 10 TO 20 KNOTS BACKING SOUTH BY MID
AFTERNOON. WAVES BUILDING TO 1 TO 3 FEET...THEN SUBSIDING TO 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 BACKING SOUTH BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
.TUESDAY NIGHT...SOUTH WINDS 10 TO 20 KNOTS BECOMING SOUTHWEST
15 TO 25 KNOTS AFTER MIDNIGHT. 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.
.THURSDAY...WEST WINDS 15 TO 25 KNOTS BECOMING NORTHWEST 10 TO
20 KNOTS. WAVES CALM TO 2 FEET.

$$

LSZ263-210415-
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-
403 PM EDT SAT AUG 20 2016

.LATE THIS AFTERNOON...NORTH WINDS 10 TO 20 KNOTS. SHOWERS. WAVES
CALM TO 2 FEET.
.TONIGHT...NORTH WINDS 20 TO 30 KNOTS. SHOWERS THROUGH MIDNIGHT...
THEN A CHANCE OF SHOWERS AFTER MIDNIGHT. WAVES BUILDING TO 5 TO
8 FEET.
.SUNDAY...NORTH WINDS 15 TO 25 KNOTS BACKING WEST BY MID
AFTERNOON. WAVES SUBSIDING TO 2 TO 4 FEET.
.SUNDAY NIGHT...WEST WINDS 10 TO 20 KNOTS. WAVES SUBSIDING TO
CALM TO 2 FEET...THEN BUILDING TO 1 TO 3 FEET.
.MONDAY...SOUTHWEST WINDS 10 TO 20 KNOTS BECOMING SOUTH 15 TO
25 KNOTS 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 1 TO 3 FEET.
.TUESDAY...SOUTHWEST WINDS 10 TO 20 KNOTS BACKING SOUTH BY MID
AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.TUESDAY NIGHT...SOUTH WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS AFTER MIDNIGHT. 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.
.THURSDAY...WEST WINDS 10 TO 20 KNOTS VEERING NORTHWEST. WAVES
CALM TO 2 FEET.

$$

LSZ264-210415-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
403 PM EDT SAT AUG 20 2016

...GALE WARNING IN EFFECT FROM 8 PM EDT THIS EVENING THROUGH
SUNDAY MORNING...

.LATE THIS AFTERNOON...NORTH WINDS 15 TO 25 KNOTS. SHOWERS. WAVES
CALM TO 2 FEET BUILDING TO 2 TO 4 FEET.
.TONIGHT...NORTH GALES TO 35 KNOTS. SHOWERS LIKELY THROUGH
MIDNIGHT...THEN A CHANCE OF SHOWERS AFTER MIDNIGHT. WAVES
BUILDING TO 7 TO 10 FEET.
.SUNDAY...NORTH WINDS 20 TO 30 KNOTS BECOMING WEST 15 TO 25 KNOTS
BY MID AFTERNOON. A SLIGHT CHANCE OF SHOWERS THROUGH EARLY
AFTERNOON. WAVES SUBSIDING TO 2 TO 4 FEET.
.SUNDAY NIGHT...WEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.MONDAY...SOUTHWEST WINDS 10 TO 20 KNOTS BACKING SOUTH BY MID
AFTERNOON. A SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS BY MID
AFTERNOON. WAVES BUILDING TO 1 TO 3 FEET.
.MONDAY NIGHT...SOUTH WINDS 10 TO 20 KNOTS BECOMING SOUTHWEST
15 TO 25 KNOTS AFTER MIDNIGHT. WAVES 1 TO 3 FEET.
.TUESDAY...SOUTHWEST WINDS 15 TO 25 KNOTS BECOMING SOUTH 10 TO
20 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.TUESDAY NIGHT...SOUTH WINDS 15 TO 25 KNOTS. WAVES BUILDING TO
1 TO 3 FEET.
.WEDNESDAY...SOUTHWEST WINDS 15 TO 25 KNOTS BECOMING WEST 10 TO
20 KNOTS. A CHANCE OF SHOWERS AND THUNDERSTORMS. WAVES BUILDING
TO 2 TO 4 FEET...THEN SUBSIDING TO CALM TO 2 FEET.
.THURSDAY...NORTHWEST WINDS 10 TO 20 KNOTS. WAVES BUILDING TO
1 TO 3 FEET...THEN SUBSIDING TO CALM TO 2 FEET.

$$

LSZ265-210415-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
403 PM EDT SAT AUG 20 2016

...GALE WARNING IN EFFECT FROM 8 PM EDT THIS EVENING THROUGH
SUNDAY MORNING...

.LATE THIS AFTERNOON...NORTH WINDS 20 TO 30 KNOTS. SHOWERS. WAVES
2 TO 4 FEET BUILDING TO 3 TO 5 FEET.
.TONIGHT...NORTH GALES TO 35 KNOTS. SHOWERS. WAVES BUILDING TO
8 TO 11 FEET.
.SUNDAY...NORTHWEST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS BY MID AFTERNOON. A CHANCE OF SHOWERS THROUGH EARLY
AFTERNOON. WAVES SUBSIDING TO 3 TO 5 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. A SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
.MONDAY NIGHT...SOUTH WINDS 10 TO 20 KNOTS BECOMING SOUTHWEST
15 TO 25 KNOTS AFTER MIDNIGHT. WAVES BUILDING TO 1 TO 3 FEET...
THEN SUBSIDING TO CALM TO 2 FEET.
.TUESDAY...SOUTHWEST WINDS 10 TO 20 KNOTS BACKING SOUTH BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
.TUESDAY NIGHT...SOUTH WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS AFTER MIDNIGHT. WAVES BUILDING TO 1 TO 3 FEET.
.WEDNESDAY...SOUTH WINDS 10 TO 20 KNOTS VEERING WEST. A CHANCE OF
SHOWERS AND THUNDERSTORMS. WAVES SUBSIDING TO CALM TO 2 FEET.
.THURSDAY...WEST WINDS 15 TO 25 KNOTS VEERING NORTHWEST. WAVES
CALM TO 2 FEET.

$$

LSZ266-210415-
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-
403 PM EDT SAT AUG 20 2016

...GALE WARNING IN EFFECT FROM 8 PM EDT THIS EVENING THROUGH
SUNDAY AFTERNOON...

.LATE THIS AFTERNOON...NORTH WINDS 20 TO 30 KNOTS. SHOWERS. WAVES
2 TO 4 FEET BUILDING TO 3 TO 6 FEET.
.TONIGHT...NORTH WINDS 20 TO 30 KNOTS INCREASING TO GALES TO
40 KNOTS AFTER MIDNIGHT. SHOWERS. WAVES BUILDING TO 10 TO
14 FEET.
.SUNDAY...NORTH GALES TO 40 KNOTS BECOMING NORTHWEST 20 TO
30 KNOTS BY MID AFTERNOON. A CHANCE OF SHOWERS THROUGH EARLY
AFTERNOON. WAVES SUBSIDING TO 3 TO 6 FEET.
.SUNDAY NIGHT...NORTHWEST WINDS 15 TO 25 KNOTS BECOMING WEST
10 TO 20 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET.
.MONDAY...SOUTHWEST WINDS 10 TO 20 KNOTS BECOMING SOUTH 15 TO
25 KNOTS BY MID AFTERNOON. A SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS BY MID AFTERNOON. WAVES SUBSIDING TO CALM TO
2 FEET...THEN BUILDING TO 1 TO 3 FEET.
.MONDAY NIGHT...SOUTH WINDS 15 TO 25 KNOTS VEERING SOUTHWEST
AFTER MIDNIGHT. WAVES BUILDING TO 2 TO 4 FEET.
.TUESDAY...SOUTHWEST WINDS 15 TO 25 KNOTS BECOMING SOUTH 10 TO
20 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO 1 TO 3 FEET.
.TUESDAY NIGHT...SOUTH WINDS 15 TO 25 KNOTS. WAVES BUILDING TO
2 TO 4 FEET.
.WEDNESDAY...SOUTH WINDS 15 TO 25 KNOTS BECOMING WEST 10 TO
20 KNOTS. A CHANCE OF SHOWERS AND THUNDERSTORMS. WAVES SUBSIDING
TO CALM TO 2 FEET.
.THURSDAY...NORTHWEST WINDS 15 TO 25 KNOTS. WAVES CALM TO 2 FEET.

$$

LSZ267-210415-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
403 PM EDT SAT AUG 20 2016

...GALE WARNING IN EFFECT FROM 3 AM EDT SUNDAY THROUGH SUNDAY
AFTERNOON...

.LATE THIS AFTERNOON...NORTHEAST WINDS 15 TO 25 KNOTS. SHOWERS
AND A SLIGHT CHANCE OF THUNDERSTORMS. WAVES CALM TO 2 FEET
BUILDING TO 1 TO 3 FEET.
.TONIGHT...NORTH WINDS 10 TO 20 KNOTS BECOMING NORTHWEST GALES TO
35 KNOTS AFTER MIDNIGHT. A CHANCE OF SHOWERS AND A SLIGHT CHANCE
OF THUNDERSTORMS THROUGH MIDNIGHT...THEN SHOWERS LIKELY AFTER
MIDNIGHT. WAVES BUILDING TO 10 TO 14 FEET.
.SUNDAY...NORTHWEST GALES TO 40 KNOTS DIMINISHING TO 20 TO 30 KNOTS
BY EARLY AFTERNOON. SHOWERS LIKELY THROUGH EARLY AFTERNOON...THEN A
SLIGHT CHANCE OF SHOWERS BY MID AFTERNOON. WAVES SUBSIDING TO 3 TO 6
FEET.
.SUNDAY NIGHT...NORTHWEST WINDS 20 TO 30 KNOTS DIMINISHING TO
15 TO 25 KNOTS AFTER MIDNIGHT. ISOLATED SHOWERS THROUGH 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...THEN BUILDING TO
1 TO 3 FEET.
.MONDAY NIGHT...SOUTH WINDS 15 TO 25 KNOTS VEERING SOUTHWEST
AFTER MIDNIGHT. A CHANCE OF SHOWERS. WAVES BUILDING TO 2 TO
4 FEET.
.TUESDAY...SOUTHWEST WINDS 15 TO 25 KNOTS BECOMING SOUTH 10 TO
20 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET...
THEN BUILDING TO 1 TO 3 FEET.
.TUESDAY NIGHT...SOUTH WINDS 15 TO 25 KNOTS. WAVES BUILDING TO
2 TO 4 FEET.
.WEDNESDAY...SOUTH WINDS 15 TO 25 KNOTS BECOMING SOUTHWEST 10 TO
20 KNOTS. A CHANCE OF SHOWERS. A CHANCE OF THUNDERSTORMS. SHOWERS
LIKELY. WAVES SUBSIDING TO CALM TO 2 FEET.
.THURSDAY...WEST WINDS 10 TO 20 KNOTS VEERING NORTHWEST. WAVES
CALM TO 2 FEET.

$$

LSZ261-210415-
MAFOR 2021/
SUPERIOR WEST 11826 11836 11846 11840 12830 11720 11620. CHANCE
OF SHOWERS AFTER MIDNIGHT TONIGHT. WAVES 2 TO 6 FEET.

SUPERIOR NORTH CENTRAL...GALE WARNING IN EFFECT...11146 11846
12856 11850 11840 12730. CHANCE OF SHOWERS LATE TONIGHT. WAVES 2
FEET OR LESS BUILDING TO 6 TO 9 FEET TONIGHT. WAVES 6 TO 9 FEET
SUBSIDING TO 3 TO 5 FEET SUNDAY.

SUPERIOR SOUTH CENTRAL...GALE WARNING IN EFFECT...12846 13856
11840 11740 11730. CHANCE OF SHOWERS THROUGH MID MORNING SUNDAY.
WAVES 3 TO 6 FEET BUILDING TO 9 TO 12 FEET TONIGHT. WAVES 9 TO 12
FEET SUBSIDING TO 5 TO 8 FEET SUNDAY.

SUPERIOR EAST...GALE WARNING IN EFFECT...11136 11830 11846 11856
11766 11756 11750 11730. CHANCE OF SHOWERS LATE THIS EVENING.
WAVES 1 TO 2 FEET BUILDING TO 9 TO 12 FEET TONIGHT. WAVES 10 TO
14 FEET SUBSIDING TO 5 TO 7 FEET SUNDAY.

$$

JS



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