Great Lakes Forecast
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000
FZUS63 KMQT 200803
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
403 AM EDT THU APR 20 2017

FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE SUPERIOR

WAVES ARE PROVIDED AS A RANGE OF SIGNIFICANT WAVE HEIGHTS, WHICH
IS THE AVERAGE OF THE HIGHEST 1/3 OF THE WAVE, ALONG WITH THE
AVERAGE HEIGHT OF THE HIGHEST 10% OF THE WAVES WHICH WILL
OCCASIONALLY BE ENCOUNTERED.

.SYNOPSIS...A 29.7 INCH LOW OVER IOWA WILL MOVE TO NORTHERN LAKE
MICHIGAN BY LATE THIS AFTERNOON. THE LOW WILL TRACK ACROSS
SOUTHERN QUEBEC ON FRIDAY EVENING WHILE A 30.3 INCH RIDGE MOVES
OVER THE NORTHERN GREAT LAKES. A RIDGE WILL LINGER OVER THE
NORTHERN GREAT LAKES THROUGH SATURDAY. A WEAK 30.0 INCH TROUGH
QUICKLY MOVES SOUTH ACROSS LAKE SUPERIOR SUNDAY MORNING...FOLLOWED
BY A 30.2 INCH RIDGE OVER THE UPPER GREAT LAKES BY SUNDAY
AFTERNOON. THE RIDGE DEPARTS TO THE EAST ON MONDAY AS A 29.4 INCH
LOW PRESSURE SYSTEM LIFTS NORTHEAST ACROSS THE NORTHERN PLAINS.
THE LOW IS EXPECTED TO REACH THE UPPER GREAT LAKES ON TUESDAY
MORNING.


LSZ162-201615-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
403 AM EDT THU APR 20 2017 /303 AM CDT THU APR 20 2017/

...GALE WARNING IN EFFECT THROUGH THIS AFTERNOON...

.EARLY THIS MORNING...NORTHEAST GALES TO 35 KNOTS. RAIN. WAVES
4 TO 8 FEET OCCASIONALLY TO 10 FEET.
.TODAY...NORTHEAST GALES TO 40 KNOTS. RAIN...POSSIBLY MIXED WITH
SNOW. WAVES BUILDING TO 6 TO 10 FEET OCCASIONALLY TO 13 FEET.
.TONIGHT...NORTH WINDS 15 TO 25 KNOTS BECOMING NORTHWEST 10 TO
20 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN SHOWERS...POSSIBLY
MIXED WITH SNOW THROUGH MIDNIGHT. WAVES SUBSIDING TO 2 TO 4 FEET.
.FRIDAY...NORTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST BY MID
AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.FRIDAY NIGHT...SOUTHWEST WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
.SATURDAY...SOUTHWEST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS BY MID AFTERNOON. WAVES BUILDING TO 1 TO 3 FEET...THEN
SUBSIDING TO CALM TO 2 FEET.
.SATURDAY NIGHT...WEST WINDS 10 TO 20 KNOTS VEERING NORTHEAST
AFTER MIDNIGHT. A CHANCE OF RAIN SHOWERS. WAVES CALM TO 2 FEET.
.SUNDAY...EAST WINDS 10 TO 20 KNOTS. A CHANCE OF SNOW SHOWERS.
WAVES BUILDING TO 1 TO 3 FEET...THEN SUBSIDING TO CALM TO 2 FEET.
.MONDAY...EAST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS. A CHANCE OF RAIN AND SNOW SHOWERS...THEN RAIN SHOWERS
LIKELY. WAVES BUILDING TO 2 TO 4 FEET...THEN SUBSIDING TO 1 TO
3 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-
403 AM EDT THU APR 20 2017

...GALE WARNING IN EFFECT THROUGH THIS AFTERNOON...

.EARLY THIS MORNING...EAST GALES TO 35 KNOTS. RAIN. WAVES 3 TO
5 FEET OCCASIONALLY TO 7 FEET BUILDING TO 4 TO 7 FEET
OCCASIONALLY TO 9 FEET.
.TODAY...NORTHEAST GALES TO 35 KNOTS. RAIN AND SNOW. WAVES
BUILDING TO 6 TO 10 FEET OCCASIONALLY TO 13 FEET.
.TONIGHT...NORTH WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS AFTER MIDNIGHT. SNOW SHOWERS LIKELY THROUGH MIDNIGHT. A
CHANCE OF RAIN SHOWERS. A CHANCE OF SNOW SHOWERS AFTER MIDNIGHT.
WAVES SUBSIDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
.FRIDAY...NORTH WINDS 10 TO 20 KNOTS BECOMING WEST 5 TO 15 KNOTS
BY MID AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.FRIDAY NIGHT...SOUTHWEST WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
.SATURDAY...SOUTHWEST WINDS 5 TO 15 KNOTS. WAVES BUILDING TO 1 TO
3 FEET.
.SATURDAY NIGHT...WEST WINDS 5 TO 15 KNOTS BECOMING NORTHEAST
10 TO 20 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN SHOWERS. WAVES
SUBSIDING TO CALM TO 2 FEET...THEN BUILDING TO 1 TO 3 FEET.
.SUNDAY...NORTHEAST WINDS 5 TO 15 KNOTS VEERING EAST. A CHANCE OF
SNOW SHOWERS. WAVES SUBSIDING TO CALM TO 2 FEET.
.MONDAY...EAST WINDS 10 TO 20 KNOTS VEERING SOUTHEAST. A CHANCE
OF RAIN SHOWERS...POSSIBLY MIXED WITH SNOW...THEN RAIN SHOWERS
LIKELY. WAVES BUILDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.

$$

LSZ264-201615-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
403 AM EDT THU APR 20 2017

...GALE WARNING IN EFFECT FROM 8 AM EDT THIS MORNING THROUGH THIS
AFTERNOON...

.EARLY THIS MORNING...EAST WINDS 20 TO 30 KNOTS. A CHANCE OF
RAIN. WAVES 3 TO 6 FEET OCCASIONALLY TO 8 FEET.
.TODAY...EAST GALES TO 35 KNOTS BACKING NORTHEAST BY MID
AFTERNOON. RAIN...POSSIBLY MIXED WITH SNOW. WAVES BUILDING TO
7 TO 10 FEET OCCASIONALLY TO 13 FEET.
.TONIGHT...NORTHEAST WINDS 20 TO 30 KNOTS BACKING NORTH AFTER
MIDNIGHT. RAIN SHOWERS AND SNOW SHOWERS THROUGH MIDNIGHT...THEN A
CHANCE OF RAIN AND SNOW SHOWERS AFTER MIDNIGHT. WAVES SUBSIDING
TO 4 TO 7 FEET OCCASIONALLY TO 9 FEET.
.FRIDAY...NORTH WINDS 15 TO 25 KNOTS BECOMING NORTHWEST 5 TO
15 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO 1 TO 3 FEET.
.FRIDAY NIGHT...WEST WINDS 5 TO 15 KNOTS DIMINISHING TO LESS THAN
10 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.SATURDAY...SOUTHWEST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS BY MID AFTERNOON. WAVES BUILDING TO 1 TO 3 FEET.
.SATURDAY NIGHT...NORTH WINDS 10 TO 20 KNOTS. A CHANCE OF SNOW
SHOWERS...POSSIBLY MIXED WITH RAIN. WAVES BUILDING TO 2 TO
4 FEET.
.SUNDAY...NORTHEAST WINDS 10 TO 20 KNOTS BECOMING SOUTHEAST 5 TO
15 KNOTS. WAVES SUBSIDING TO CALM TO 2 FEET.
.MONDAY...SOUTHEAST WINDS 15 TO 25 KNOTS. A CHANCE OF SNOW
SHOWERS...POSSIBLY MIXED WITH RAIN...THEN RAIN SHOWERS. WAVES
BUILDING TO 5 TO 8 FEET OCCASIONALLY TO 10 FEET.

$$

LSZ265-201615-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
403 AM EDT THU APR 20 2017

...GALE WARNING IN EFFECT FROM 8 AM EDT THIS MORNING THROUGH THIS
AFTERNOON...

.EARLY THIS MORNING...EAST WINDS 20 TO 30 KNOTS. RAIN...POSSIBLY
MIXED WITH SNOW. WAVES 3 TO 6 FEET OCCASIONALLY TO 8 FEET BUILDING
TO 4 TO 7 FEET OCCASIONALLY TO 9 FEET.
.TODAY...EAST GALES TO 40 KNOTS BECOMING NORTHEAST GALES TO
35 KNOTS BY MID AFTERNOON. RAIN AND SNOW. WAVES BUILDING TO 7 TO
10 FEET OCCASIONALLY TO 13 FEET.
.TONIGHT...NORTHEAST WINDS 20 TO 30 KNOTS BECOMING NORTH AFTER
MIDNIGHT. RAIN SHOWERS AND SNOW SHOWERS LIKELY THROUGH
MIDNIGHT...THEN A CHANCE OF SNOW SHOWERS...POSSIBLY MIXED WITH
RAIN AFTER MIDNIGHT. WAVES SUBSIDING TO 5 TO 8 FEET OCCASIONALLY
TO 10 FEET.
.FRIDAY...NORTH WINDS 15 TO 25 KNOTS BECOMING NORTHWEST 10 TO
20 KNOTS BY MID AFTERNOON. A SLIGHT CHANCE OF RAIN SHOWERS
THROUGH EARLY AFTERNOON. WAVES SUBSIDING TO 2 TO 4 FEET.
.FRIDAY NIGHT...NORTHWEST WINDS 5 TO 15 KNOTS BACKING WEST AFTER
MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.SATURDAY...SOUTHWEST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
.SATURDAY NIGHT...WEST WINDS 10 TO 20 KNOTS BECOMING NORTH 15 TO
25 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN SHOWERS. A CHANCE OF
SNOW SHOWERS AFTER MIDNIGHT. WAVES BUILDING TO 2 TO 4 FEET.
.SUNDAY...NORTHEAST WINDS 10 TO 20 KNOTS BECOMING EAST 5 TO
15 KNOTS. WAVES SUBSIDING TO CALM TO 2 FEET.
.MONDAY...SOUTHEAST WINDS 15 TO 25 KNOTS. RAIN SHOWERS LIKELY.
WAVES BUILDING TO 4 TO 7 FEET OCCASIONALLY TO 9 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-
403 AM EDT THU APR 20 2017

...GALE WARNING IN EFFECT FROM 8 AM EDT THIS MORNING THROUGH THIS
AFTERNOON...

.EARLY THIS MORNING...EAST WINDS 20 TO 30 KNOTS. RAIN. WAVES 3 TO
6 FEET OCCASIONALLY TO 8 FEET.
.TODAY...EAST GALES TO 40 KNOTS. RAIN...POSSIBLY MIXED WITH SNOW.
WAVES BUILDING TO 7 TO 10 FEET OCCASIONALLY TO 13 FEET.
.TONIGHT...NORTHEAST WINDS 20 TO 30 KNOTS BECOMING NORTH AFTER
MIDNIGHT. RAIN SHOWERS AND SNOW SHOWERS LIKELY THROUGH
MIDNIGHT...THEN A CHANCE OF RAIN AND SNOW SHOWERS AFTER MIDNIGHT.
WAVES SUBSIDING TO 5 TO 8 FEET OCCASIONALLY TO 10 FEET.
.FRIDAY...NORTH WINDS 20 TO 30 KNOTS BECOMING NORTHWEST 15 TO
25 KNOTS BY MID AFTERNOON. A SLIGHT CHANCE OF RAIN SHOWERS
THROUGH EARLY AFTERNOON. WAVES SUBSIDING TO 3 TO 5 FEET
OCCASIONALLY TO 7 FEET.
.FRIDAY NIGHT...NORTHWEST WINDS 10 TO 20 KNOTS DIMINISHING TO
5 TO 15 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.SATURDAY...SOUTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTH BY MID
AFTERNOON. WAVES BUILDING TO 1 TO 3 FEET.
.SATURDAY NIGHT...WEST WINDS 10 TO 20 KNOTS BECOMING NORTH 15 TO
25 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN SHOWERS AFTER MIDNIGHT.
WAVES BUILDING TO 2 TO 4 FEET.
.SUNDAY...NORTH WINDS 10 TO 20 KNOTS BECOMING EAST 5 TO 15 KNOTS.
WAVES SUBSIDING TO CALM TO 2 FEET.
.MONDAY...SOUTHEAST WINDS 15 TO 25 KNOTS. RAIN SHOWERS...POSSIBLY
MIXED WITH SNOW SHOWERS. WAVES BUILDING TO 5 TO 8 FEET
OCCASIONALLY TO 10 FEET.

$$

LSZ267-201615-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
403 AM EDT THU APR 20 2017

...GALE WARNING IN EFFECT FROM 8 AM EDT THIS MORNING THROUGH THIS
AFTERNOON...

.EARLY THIS MORNING...EAST WINDS 20 TO 30 KNOTS. RAIN...POSSIBLY
MIXED WITH SNOW. WAVES 2 TO 4 FEET.
.TODAY...EAST GALES TO 35 KNOTS. SNOW THROUGH EARLY AFTERNOON.
RAIN. WAVES BUILDING TO 4 TO 8 FEET OCCASIONALLY TO 10 FEET.
.TONIGHT...NORTHEAST WINDS 20 TO 30 KNOTS BECOMING NORTH 15 TO
25 KNOTS AFTER MIDNIGHT. RAIN SHOWERS AND SNOW SHOWERS THROUGH
MIDNIGHT...THEN A CHANCE OF SNOW SHOWERS...POSSIBLY MIXED WITH
RAIN AFTER MIDNIGHT. WAVES 4 TO 7 FEET OCCASIONALLY TO 9 FEET.
.FRIDAY...NORTH WINDS 20 TO 30 KNOTS BACKING NORTHWEST BY MID
AFTERNOON. A SLIGHT CHANCE OF RAIN AND SNOW SHOWERS THROUGH EARLY
AFTERNOON. WAVES SUBSIDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
.FRIDAY NIGHT...NORTH WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.SATURDAY...WEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
.SATURDAY NIGHT...SOUTHWEST WINDS 5 TO 15 KNOTS BECOMING NORTH
10 TO 20 KNOTS AFTER MIDNIGHT. WAVES BUILDING TO 1 TO 3 FEET.
.SUNDAY...NORTH WINDS 15 TO 25 KNOTS BECOMING EAST 10 TO
20 KNOTS. WAVES BUILDING TO 2 TO 4 FEET...THEN SUBSIDING TO CALM
TO 2 FEET.
.MONDAY...SOUTHEAST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO
30 KNOTS. A CHANCE OF RAIN SHOWERS...POSSIBLY MIXED WITH SNOW.
WAVES BUILDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.

$$

LSZ261-201615-
MAFOR 2009/
SUPERIOR WEST...GALE WARNING IN EFFECT...12156 13157 12830 11820.
CHANCE OF RAIN AND SNOW SHOWERS LATE IN THE EVENING. CHANCE OF
RAIN SHOWERS AFTER MIDNIGHT TONIGHT. WAVES 5 TO 8 FEET BUILDING
TO 6 TO 10 FEET TODAY. WAVES 5 TO 9 FEET SUBSIDING TO 3 TO 6 FEET
TONIGHT.

SUPERIOR NORTH CENTRAL...GALE WARNING IN EFFECT...11240 11257
13157 12147 11840. CHANCE OF RAIN EARLY THIS MORNING. CHANCE OF
RAIN AND SNOW SHOWERS LATE TONIGHT. WAVES 3 TO 5 FEET BUILDING TO
7 TO 10 FEET TODAY. WAVES 6 TO 10 FEET SUBSIDING TO 5 TO 8 FEET
TONIGHT.

SUPERIOR SOUTH CENTRAL...GALE WARNING IN EFFECT...11246 13257
13147 11840. CHANCE OF SNOW AND RAIN SHOWERS LATE TONIGHT. WAVES
3 TO 5 FEET BUILDING TO 7 TO 10 FEET TODAY. WAVES 6 TO 10 FEET
TONIGHT.

SUPERIOR EAST...GALE WARNING IN EFFECT...11246 12257 11256 11156
12147 11140. CHANCE OF RAIN AND SNOW SHOWERS AFTER MIDNIGHT.
CHANCE OF SNOW AND RAIN SHOWERS LATE TONIGHT. WAVES 2 TO 4 FEET
BUILDING TO 5 TO 9 FEET TODAY. WAVES 5 TO 9 FEET TONIGHT.

$$

TITUS

EXPERIMENTAL MODERNIZED OPEN LAKE FORECAST IS AVAILABLE ONLINE AT
WEATHER.GOV/MQT/GLFTABLE

GRAPHICAL MARINE FORECASTS ARE AVAILABLE ONLINE AT:
WEATHER.GOV/GREATLAKES



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