Great Lakes Forecast
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000
FZUS63 KMQT 182001
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
401 PM EDT TUE APR 18 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 NEAR DULUTH WILL TRACK NORTHEASTWARD
ACROSS LAKE SUPERIOR TONIGHT AS A 30.3 INCH HIGH PRESSURE MOVES
INTO FAR NORTHWESTERN ONTARIO. THE HIGH WILL MOVE OVER QUEBEC ON
THURSDAY AS A 29.7 INCH LOW PRESSURE MOVES FROM THE CENTRAL PLAINS
TO LOWER MICHIGAN. THE LOW WILL MOVE OFF THE EAST COAST LATE
FRIDAY AFTERNOON AS A 30.4 INCH RIDGE MOVES OVER THE NORTHERN
GREAT LAKES. THE 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 30.3 INCH
RIDGE OVER THE UPPER GREAT LAKES BY SUNDAY AFTERNOON.

LSZ162-190415-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
401 PM EDT TUE APR 18 2017 /301 PM CDT TUE APR 18 2017/

.LATE THIS AFTERNOON...NORTHEAST WINDS 15 TO 25 KNOTS BACKING
NORTH. RAIN SHOWERS. WAVES 2 TO 4 FEET.
.TONIGHT...NORTHWEST WINDS 10 TO 20 KNOTS VEERING NORTH LATE. A
SLIGHT CHANCE OF RAIN SHOWERS THROUGH MIDNIGHT. WAVES SUBSIDING
TO 1 TO 3 FEET.
.WEDNESDAY...NORTHEAST WINDS 10 TO 20 KNOTS VEERING EAST IN THE
AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET...THEN BUILDING TO
1 TO 3 FEET.
.WEDNESDAY NIGHT...EAST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO
30 KNOTS AFTER MIDNIGHT...THEN BACKING NORTHEAST LATE. A CHANCE
OF RAIN. SNOW LIKELY AFTER MIDNIGHT. WAVES BUILDING TO 3 TO 6 FEET
OCCASIONALLY TO 8 FEET.
.THURSDAY...NORTHEAST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS BY MID AFTERNOON. GALE FORCE GUSTS TO 35 KNOTS IN THE
MORNING. RAIN...POSSIBLY MIXED WITH SNOW. WAVES BUILDING TO 5 TO
8 FEET OCCASIONALLY TO 10 FEET...THEN SUBSIDING TO 3 TO 6 FEET
OCCASIONALLY TO 8 FEET.
.THURSDAY NIGHT...NORTH WINDS 10 TO 20 KNOTS BECOMING NORTHWEST
5 TO 15 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN THROUGH MIDNIGHT.
WAVES SUBSIDING TO CALM TO 2 FEET.
.FRIDAY...NORTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
.FRIDAY NIGHT...SOUTHWEST WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
.SATURDAY...SOUTHWEST WINDS 5 TO 15 KNOTS BECOMING NORTH 10 TO
20 KNOTS. WAVES BUILDING TO 1 TO 3 FEET.
.SUNDAY...EAST WINDS 10 TO 20 KNOTS. WAVES 1 TO 3 FEET.

$$

LSZ263-190415-
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-
401 PM EDT TUE APR 18 2017

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

$$

LSZ264-190415-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
401 PM EDT TUE APR 18 2017

...GALE WARNING IN EFFECT UNTIL 8 PM EDT THIS EVENING...

.LATE THIS AFTERNOON...SOUTHEAST GALES TO 35 KNOTS. RAIN SHOWERS.
WAVES 6 TO 9 FEET OCCASIONALLY TO 11 FEET.
.TONIGHT...SOUTH WINDS 20 TO 30 KNOTS BECOMING NORTH 10 TO 20
KNOTS AFTER MIDNIGHT...THEN INCREASING TO 15 TO 25 KNOTS LATE. A
CHANCE OF RAIN SHOWERS THROUGH MIDNIGHT. WAVES SUBSIDING TO 3 TO 6
FEET OCCASIONALLY TO 8 FEET.
.WEDNESDAY...NORTH WINDS 10 TO 20 KNOTS BECOMING NORTHEAST 5 TO
15 KNOTS LATE. WAVES SUBSIDING TO CALM TO 2 FEET.
.WEDNESDAY NIGHT...NORTHEAST WINDS 5 TO 15 KNOTS BECOMING EAST
15 TO 25 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF RAIN AND SNOW
AFTER MIDNIGHT. WAVES BUILDING TO 3 TO 6 FEET OCCASIONALLY TO
8 FEET.
.THURSDAY...EAST WINDS 15 TO 25 KNOTS BACKING NORTHEAST BY MID
AFTERNOON. A CHANCE OF RAIN AND SNOW THROUGH EARLY AFTERNOON...
THEN RAIN...POSSIBLY MIXED WITH SNOW BY MID AFTERNOON. WAVES
BUILDING TO 4 TO 7 FEET OCCASIONALLY TO 9 FEET...THEN SUBSIDING
TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.
.THURSDAY NIGHT...NORTHEAST WINDS 15 TO 25 KNOTS BECOMING NORTH
10 TO 20 KNOTS AFTER MIDNIGHT. RAIN...POSSIBLY MIXED WITH SNOW
THROUGH MIDNIGHT...THEN A CHANCE OF RAIN AND SNOW AFTER MIDNIGHT.
WAVES SUBSIDING TO 2 TO 4 FEET.
.FRIDAY...NORTH WINDS 10 TO 20 KNOTS BECOMING NORTHWEST 5 TO
15 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.FRIDAY NIGHT...NORTHWEST WINDS 5 TO 15 KNOTS BECOMING WEST LESS
THAN 10 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.SATURDAY...SOUTHWEST WINDS 5 TO 15 KNOTS BECOMING NORTH 10 TO
20 KNOTS. WAVES BUILDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
.SUNDAY...NORTH WINDS 10 TO 20 KNOTS VEERING EAST. A CHANCE OF
SNOW SHOWERS. WAVES SUBSIDING TO CALM TO 2 FEET...THEN BUILDING
TO 2 TO 4 FEET.

$$

LSZ265-190415-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
401 PM EDT TUE APR 18 2017

...GALE WARNING IN EFFECT UNTIL 8 PM EDT THIS EVENING...

.LATE THIS AFTERNOON...SOUTHEAST WINDS 20 TO 30 KNOTS WITH GALE
FORCE GUSTS TO 35 KNOTS. RAIN SHOWERS. WAVES 4 TO 7 FEET
OCCASIONALLY TO 9 FEET.
.TONIGHT...SOUTH WINDS 15 TO 25 KNOTS VEERING WEST AFTER
MIDNIGHT...THEN VEERING NORTHWEST LATE. A CHANCE OF RAIN SHOWERS
THROUGH MIDNIGHT. WAVES SUBSIDING TO 2 TO 4 FEET...THEN BUILDING
TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
.WEDNESDAY...NORTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS IN THE AFTERNOON...THEN VEERING NORTHEAST LATE. WAVES
SUBSIDING TO 1 TO 3 FEET.
.WEDNESDAY NIGHT...NORTHEAST WINDS 10 TO 20 KNOTS BECOMING EAST
15 TO 25 KNOTS AFTER MIDNIGHT...THEN INCREASING TO 20 TO 30 KNOTS
LATE. A CHANCE OF RAIN. A SLIGHT CHANCE OF SNOW AFTER MIDNIGHT.
WAVES SUBSIDING TO CALM TO 2 FEET...THEN BUILDING TO 3 TO 6 FEET
OCCASIONALLY TO 8 FEET.
.THURSDAY...EAST WINDS 20 TO 30 KNOTS BACKING NORTHEAST BY MID
AFTERNOON. GALE FORCE GUSTS TO 35 KNOTS. RAIN AND SNOW. WAVES
BUILDING TO 5 TO 8 FEET OCCASIONALLY TO 10 FEET...THEN SUBSIDING
TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.
.THURSDAY NIGHT...NORTH WINDS 15 TO 25 KNOTS. RAIN AND SNOW
LIKELY THROUGH MIDNIGHT...THEN A CHANCE OF SNOW...POSSIBLY MIXED
WITH RAIN. WAVES 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
.FRIDAY...NORTH WINDS 15 TO 25 KNOTS BECOMING NORTHWEST 10 TO
20 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO 1 TO 3 FEET.
.FRIDAY NIGHT...NORTHWEST WINDS 5 TO 15 KNOTS. WAVES SUBSIDING TO
CALM TO 2 FEET.
.SATURDAY...SOUTHWEST WINDS 5 TO 15 KNOTS BECOMING NORTH 10 TO
20 KNOTS. WAVES BUILDING TO 2 TO 4 FEET.
.SUNDAY...NORTH WINDS 15 TO 25 KNOTS BECOMING EAST 10 TO
20 KNOTS. A CHANCE OF SNOW SHOWERS. WAVES BUILDING TO 3 TO 5 FEET
OCCASIONALLY TO 7 FEET...THEN SUBSIDING TO CALM TO 2 FEET.

$$

LSZ266-190415-
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-
401 PM EDT TUE APR 18 2017

...GALE WARNING IN EFFECT UNTIL 11 PM EDT THIS EVENING...

.LATE THIS AFTERNOON...SOUTHEAST GALES TO 35 KNOTS. RAIN SHOWERS
LIKELY. WAVES 6 TO 9 FEET OCCASIONALLY TO 11 FEET.
.TONIGHT...SOUTH GALES TO 35 KNOTS BECOMING WEST 15 TO 25 KNOTS
BY MIDNIGHT...THEN VEERING NORTHWEST LATE. A CHANCE OF RAIN
SHOWERS. WAVES SUBSIDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
.WEDNESDAY...NORTH WINDS 20 TO 30 KNOTS DIMINISHING TO 10 TO
20 KNOTS. WAVES 3 TO 6 FEET OCCASIONALLY TO 8 FEET SUBSIDING TO 1
TO 3 FEET.
.WEDNESDAY NIGHT...NORTHEAST WINDS 10 TO 20 KNOTS BECOMING EAST
15 TO 25 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN. A SLIGHT CHANCE
OF SNOW AFTER MIDNIGHT. WAVES BUILDING TO 3 TO 6 FEET
OCCASIONALLY TO 8 FEET.
.THURSDAY...EAST WINDS 20 TO 30 KNOTS BACKING NORTHEAST BY MID
AFTERNOON. GALE FORCE GUSTS TO 35 KNOTS. RAIN AND SNOW. WAVES
BUILDING TO 5 TO 8 FEET OCCASIONALLY TO 10 FEET...THEN SUBSIDING
TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.
.THURSDAY NIGHT...NORTHEAST WINDS 20 TO 30 KNOTS BACKING NORTH
AFTER MIDNIGHT. RAIN AND SNOW LIKELY THROUGH MIDNIGHT...THEN A
CHANCE OF RAIN AND SNOW. WAVES 3 TO 5 FEET OCCASIONALLY TO 7
FEET.
.FRIDAY...NORTH WINDS 15 TO 25 KNOTS BACKING NORTHWEST BY MID
AFTERNOON. WAVES SUBSIDING TO 2 TO 4 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...SOUTHWEST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS. WAVES BUILDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
.SUNDAY...NORTH WINDS 15 TO 25 KNOTS VEERING EAST. A CHANCE OF
SNOW SHOWERS. WAVES SUBSIDING TO CALM TO 2 FEET...THEN BUILDING
TO 2 TO 4 FEET.

$$

LSZ267-190415-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
401 PM EDT TUE APR 18 2017

...GALE WARNING IN EFFECT UNTIL 11 PM EDT THIS EVENING...

.LATE THIS AFTERNOON...SOUTHEAST GALES TO 35 KNOTS. A CHANCE OF
RAIN SHOWERS. WAVES 5 TO 8 FEET OCCASIONALLY TO 10 FEET.
.TONIGHT...SOUTHEAST GALES TO 35 KNOTS BECOMING SOUTH 15 TO
25 KNOTS BY MIDNIGHT...THEN BECOMING WEST 10 TO 20 KNOTS LATE. A
CHANCE OF RAIN SHOWERS. WAVES BUILDING TO 6 TO 9 FEET OCCASIONALLY
TO 11 FEET...THEN SUBSIDING TO 1 TO 3 FEET.
.WEDNESDAY...NORTHWEST WINDS 15 TO 25 KNOTS VEERING NORTH IN THE
AFTERNOON...THEN DIMINISHING TO 10 TO 20 KNOTS LATE. WAVES 1 TO 3
FEET.
.WEDNESDAY NIGHT...NORTHEAST WINDS 10 TO 20 KNOTS BECOMING EAST
15 TO 25 KNOTS AFTER MIDNIGHT...THEN INCREASING TO 20 TO 30 KNOTS
LATE. A CHANCE OF RAIN...POSSIBLY MIXED WITH SNOW AFTER MIDNIGHT.
WAVES 1 TO 3 FEET.
.THURSDAY...EAST WINDS 20 TO 30 KNOTS. RAIN...POSSIBLY MIXED WITH
SNOW. WAVES BUILDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
.THURSDAY NIGHT...NORTHEAST WINDS 20 TO 30 KNOTS BACKING NORTH
AFTER MIDNIGHT. RAIN AND SNOW LIKELY THROUGH MIDNIGHT...THEN A
CHANCE OF RAIN AND SNOW. WAVES 3 TO 5 FEET OCCASIONALLY TO 7
FEET.
.FRIDAY...NORTH WINDS 15 TO 25 KNOTS BACKING NORTHWEST BY MID
AFTERNOON. WAVES SUBSIDING TO 2 TO 4 FEET.
.FRIDAY NIGHT...NORTH WINDS 10 TO 20 KNOTS. WAVES SUBSIDING TO
CALM TO 2 FEET.
.SATURDAY...WEST WINDS 5 TO 15 KNOTS BECOMING SOUTHWEST 10 TO
20 KNOTS. WAVES BUILDING TO 2 TO 4 FEET.
.SUNDAY...NORTH WINDS 15 TO 25 KNOTS VEERING EAST. WAVES
SUBSIDING TO CALM TO 2 FEET...THEN BUILDING TO 1 TO 3 FEET.

$$

LSZ261-190415-
MAFOR 1821/
SUPERIOR WEST 11236 13710 12810 11110 11220. WAVES 1 TO 4 FEET.

SUPERIOR NORTH CENTRAL...GALE WARNING IN EFFECT...11356 11436
11620 13830 12820. WAVES 4 TO 9 FEET TONIGHT SUBSIDING TO 2 TO 4
FEET WEDNESDAY.

SUPERIOR SOUTH CENTRAL...GALE WARNING IN EFFECT...11346 19356
11440 11530 11620 11730 11830 12820. CHANCE OF RAIN SHOWERS LATE
THIS EVENING. WAVES 3 TO 7 FEET.

SUPERIOR EAST...GALE WARNING IN EFFECT...12356 11446 11520 12730
12820. CHANCE OF RAIN SHOWERS OVERNIGHT. WAVES 5 TO 9 FEET
SUBSIDING TO 3 TO 5 FEET TONIGHT. WAVES 3 TO 5 FEET WEDNESDAY.

$$

KLUBER

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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