Great Lakes Forecast
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925
FZUS63 KMQT 230209
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
1009 PM EDT SAT APR 22 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 30.0 INCH TROUGH OVER LAKE SUPERIOR LATE THIS
EVENING WILL MOVE SOUTHEASTWARD THROUGH SUNDAY ON THE SOUTHERN
FLANK OF A 30.4 INCH RIDGE BUILDING OVER NORTHERN ONTARIO. AS
THIS RIDGE DRIFTS TO QUEBEC ON MONDAY...A 29.5 INCH LOW PRESSURE
WILL ORGANIZE OVER THE CENTRAL PLAINS. THE LOW WILL TRACK ACROSS
WESTERN LAKE SUPERIOR ON TUESDAY THEN EXIT INTO QUEBEC ON TUESDAY
NIGHT WHILE ANOTHER LOW PRESSURE SYSTEM OF 29.4 INCHES MOVES FROM
THE CENTRAL PLAINS TO THE UPPER GREAT LAKES. THE LOW IS EXPECTED
TO MOVE ACROSS THE UPPER GREAT LAKES AT 29.3 INCHES ON WEDNESDAY.

LSZ162-231015-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
1009 PM EDT SAT APR 22 2017 /909 PM CDT SAT APR 22 2017/

.REST OF TONIGHT...NORTHWEST WINDS 10 TO 20 KNOTS BECOMING
NORTHEAST 5 TO 15 KNOTS AFTER MIDNIGHT...THEN INCREASING TO 10 TO
20 KNOTS LATE. A SLIGHT CHANCE OF RAIN THROUGH MIDNIGHT...THEN
RAIN...POSSIBLY MIXED WITH SNOW. WAVES 1 TO 3 FEET SUBSIDING TO
CALM TO 2 FEET.
.SUNDAY...NORTHEAST WINDS 10 TO 20 KNOTS VEERING EAST IN THE
AFTERNOON. A CHANCE OF RAIN AND SNOW. WAVES BUILDING TO 2 TO
4 FEET.
.SUNDAY NIGHT...EAST WINDS 10 TO 20 KNOTS INCREASING TO 20 TO
30 KNOTS. SCATTERED SNOW SHOWERS THROUGH MIDNIGHT. A CHANCE OF
RAIN SHOWERS. NUMEROUS SNOW SHOWERS...POSSIBLY MIXED WITH
FREEZING RAIN AFTER MIDNIGHT. WAVES BUILDING TO 3 TO 6 FEET
OCCASIONALLY TO 8 FEET.
.MONDAY...EAST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO 30 KNOTS
BY MID AFTERNOON. ISOLATED SNOW SHOWERS THROUGH EARLY AFTERNOON.
A CHANCE OF RAIN SHOWERS. WAVES BUILDING TO 5 TO 8 FEET
OCCASIONALLY TO 10 FEET.
.MONDAY NIGHT...EAST WINDS 20 TO 30 KNOTS BECOMING SOUTH 10 TO
20 KNOTS AFTER MIDNIGHT. RAIN SHOWERS LIKELY. WAVES SUBSIDING TO
2 TO 4 FEET.
.TUESDAY...WEST WINDS 10 TO 20 KNOTS VEERING NORTH BY MID
AFTERNOON. WAVES SUBSIDING TO 1 TO 3 FEET.
.TUESDAY NIGHT...NORTHEAST WINDS 15 TO 25 KNOTS. SCATTERED SNOW
SHOWERS AFTER MIDNIGHT. WAVES BUILDING TO 4 TO 7 FEET
OCCASIONALLY TO 9 FEET.
.WEDNESDAY...NORTHEAST WINDS 15 TO 25 KNOTS BACKING NORTH.
SCATTERED SNOW SHOWERS...POSSIBLY MIXED WITH RAIN. WAVES BUILDING
TO 6 TO 9 FEET OCCASIONALLY TO 11 FEET...THEN SUBSIDING TO 4 TO
7 FEET OCCASIONALLY TO 9 FEET.
.THURSDAY...NORTH WINDS 10 TO 20 KNOTS VEERING EAST. WAVES
SUBSIDING TO CALM TO 2 FEET.

$$

LSZ263-231015-
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-
1009 PM EDT SAT APR 22 2017

.REST OF TONIGHT...NORTHEAST WINDS 5 TO 15 KNOTS INCREASING TO
10 TO 20 KNOTS AFTER MIDNIGHT. RAIN AND SNOW LIKELY AFTER
MIDNIGHT. WAVES 1 TO 3 FEET BUILDING TO 2 TO 4 FEET.
.SUNDAY...NORTHEAST WINDS 10 TO 20 KNOTS VEERING EAST IN THE
AFTERNOON. A CHANCE OF SNOW...POSSIBLY MIXED WITH RAIN. WAVES
SUBSIDING TO 1 TO 3 FEET.
.SUNDAY NIGHT...EAST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN SHOWERS. SCATTERED SNOW
SHOWERS THROUGH MIDNIGHT. NUMEROUS SNOW SHOWERS AFTER MIDNIGHT.
WAVES BUILDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
.MONDAY...EAST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO 30 KNOTS
BY MID AFTERNOON. SCATTERED SNOW SHOWERS THROUGH EARLY AFTERNOON.
A CHANCE OF RAIN SHOWERS. WAVES BUILDING TO 5 TO 8 FEET
OCCASIONALLY TO 10 FEET.
.MONDAY NIGHT...EAST WINDS 20 TO 30 KNOTS BECOMING SOUTHEAST
15 TO 25 KNOTS AFTER MIDNIGHT. RAIN SHOWERS LIKELY. WAVES
SUBSIDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
.TUESDAY...WEST WINDS 5 TO 15 KNOTS BECOMING NORTH 10 TO 20 KNOTS
BY MID AFTERNOON. A CHANCE OF RAIN SHOWERS. WAVES SUBSIDING TO
1 TO 3 FEET...THEN BUILDING TO 2 TO 4 FEET.
.TUESDAY NIGHT...NORTH WINDS 15 TO 25 KNOTS BECOMING NORTHEAST
20 TO 30 KNOTS AFTER MIDNIGHT. SCATTERED SNOW SHOWERS. WAVES
BUILDING TO 5 TO 8 FEET OCCASIONALLY TO 10 FEET.
.WEDNESDAY...NORTHEAST WINDS 20 TO 30 KNOTS BACKING NORTH.
NUMEROUS SNOW SHOWERS...THEN SCATTERED SNOW SHOWERS...POSSIBLY
MIXED WITH RAIN. WAVES BUILDING TO 8 TO 11 FEET OCCASIONALLY TO
14 FEET...THEN SUBSIDING TO 6 TO 9 FEET OCCASIONALLY TO 11 FEET.
.THURSDAY...NORTH WINDS 15 TO 25 KNOTS BECOMING NORTHEAST 5 TO
15 KNOTS. SCATTERED SNOW SHOWERS...POSSIBLY MIXED WITH RAIN.
WAVES SUBSIDING TO 1 TO 3 FEET.

$$

LSZ264-231015-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
1009 PM EDT SAT APR 22 2017

.REST OF TONIGHT...NORTH WINDS 10 TO 20 KNOTS. A CHANCE OF RAIN
BY MIDNIGHT...THEN RAIN LIKELY...POSSIBLY MIXED WITH SNOW AFTER
MIDNIGHT. WAVES 1 TO 3 FEET BUILDING TO 3 TO 5 FEET OCCASIONALLY
TO 7 FEET.
.SUNDAY...NORTH WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO 15 KNOTS
IN THE AFTERNOON...THEN VEERING NORTHEAST LATE. A SLIGHT CHANCE
OF SNOW THROUGH EARLY AFTERNOON. WAVES SUBSIDING TO CALM TO
2 FEET.
.SUNDAY NIGHT...EAST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS LATE. SCATTERED SNOW SHOWERS. WAVES CALM TO 2 FEET.
.MONDAY...EAST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO 30 KNOTS
BY MID AFTERNOON. SCATTERED SNOW SHOWERS THROUGH EARLY AFTERNOON.
A CHANCE OF RAIN SHOWERS. WAVES BUILDING TO 5 TO 8 FEET
OCCASIONALLY TO 10 FEET.
.MONDAY NIGHT...SOUTHEAST WINDS 20 TO 30 KNOTS. A CHANCE OF RAIN
SHOWERS THROUGH MIDNIGHT...THEN RAIN SHOWERS LIKELY. WAVES
SUBSIDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.
.TUESDAY...SOUTH WINDS 15 TO 25 KNOTS BECOMING NORTH 10 TO
20 KNOTS BY MID AFTERNOON. A CHANCE OF RAIN SHOWERS. WAVES
SUBSIDING TO 2 TO 4 FEET.
.TUESDAY NIGHT...NORTH WINDS 15 TO 25 KNOTS INCREASING TO 20 TO
30 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN SHOWERS THROUGH
MIDNIGHT. SCATTERED SNOW SHOWERS. WAVES BUILDING TO 6 TO 9 FEET
OCCASIONALLY TO 11 FEET.
.WEDNESDAY...NORTHEAST WINDS 20 TO 30 KNOTS BACKING NORTH.
NUMEROUS SNOW SHOWERS...THEN SCATTERED SNOW SHOWERS. WAVES
BUILDING TO 9 TO 12 FEET OCCASIONALLY TO 15 FEET...THEN SUBSIDING
TO 7 TO 10 FEET OCCASIONALLY TO 13 FEET.
.THURSDAY...NORTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS. SCATTERED SNOW SHOWERS...POSSIBLY MIXED WITH RAIN.
WAVES SUBSIDING TO 1 TO 3 FEET.

$$

LSZ265-231015-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
1009 PM EDT SAT APR 22 2017

.REST OF TONIGHT...NORTH WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS LATE. RAIN...POSSIBLY MIXED WITH SNOW AFTER MIDNIGHT.
WAVES CALM TO 2 FEET BUILDING TO 2 TO 4 FEET.
.SUNDAY...NORTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS IN THE AFTERNOON...THEN VEERING NORTHEAST LATE. A CHANCE
OF RAIN THROUGH EARLY AFTERNOON. A CHANCE OF SNOW. WAVES
SUBSIDING TO CALM TO 2 FEET.
.SUNDAY NIGHT...NORTHEAST WINDS 5 TO 15 KNOTS BECOMING EAST 10 TO
20 KNOTS AFTER MIDNIGHT. SCATTERED SNOW SHOWERS. WAVES CALM TO
2 FEET.
.MONDAY...EAST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO 30 KNOTS
BY MID AFTERNOON. SCATTERED SNOW SHOWERS...POSSIBLY MIXED WITH
RAIN THROUGH EARLY AFTERNOON. WAVES BUILDING TO 4 TO 7 FEET
OCCASIONALLY TO 9 FEET.
.MONDAY NIGHT...SOUTHEAST WINDS 20 TO 30 KNOTS. A CHANCE OF RAIN
SHOWERS THROUGH MIDNIGHT...THEN RAIN SHOWERS LIKELY AFTER
MIDNIGHT. WAVES SUBSIDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
.TUESDAY...SOUTH WINDS 15 TO 25 KNOTS BECOMING NORTHWEST 10 TO
20 KNOTS BY MID AFTERNOON. A CHANCE OF RAIN SHOWERS. WAVES
SUBSIDING TO 1 TO 3 FEET.
.TUESDAY NIGHT...NORTH WINDS 15 TO 25 KNOTS INCREASING TO 20 TO
30 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN AND SNOW SHOWERS
THROUGH MIDNIGHT...THEN NUMEROUS SNOW SHOWERS...POSSIBLY MIXED
WITH RAIN. WAVES BUILDING TO 6 TO 9 FEET OCCASIONALLY TO 11 FEET.
.WEDNESDAY...NORTH WINDS 20 TO 30 KNOTS. NUMEROUS SNOW SHOWERS.
WAVES BUILDING TO 8 TO 12 FEET OCCASIONALLY TO 15 FEET.
.THURSDAY...NORTH WINDS 15 TO 25 KNOTS. SCATTERED SNOW SHOWERS...
POSSIBLY MIXED WITH RAIN. WAVES SUBSIDING TO 1 TO 3 FEET.

$$

LSZ266-231015-
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-
1009 PM EDT SAT APR 22 2017

.REST OF TONIGHT...NORTHWEST WINDS 10 TO 20 KNOTS BECOMING NORTH
15 TO 25 KNOTS AFTER MIDNIGHT. RAIN...POSSIBLY MIXED WITH SNOW
AFTER MIDNIGHT. WAVES 1 TO 3 FEET BUILDING TO 3 TO 5 FEET
OCCASIONALLY TO 7 FEET.
.SUNDAY...NORTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS IN THE AFTERNOON. A CHANCE OF RAIN AND SNOW THROUGH
EARLY AFTERNOON. WAVES SUBSIDING TO 1 TO 3 FEET.
.SUNDAY NIGHT...NORTH WINDS 5 TO 15 KNOTS BECOMING NORTHEAST
10 TO 20 KNOTS AFTER MIDNIGHT...THEN VEERING EAST LATE. SCATTERED
SNOW SHOWERS. WAVES SUBSIDING TO CALM TO 2 FEET.
.MONDAY...EAST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO 30 KNOTS
BY MID AFTERNOON. SCATTERED SNOW SHOWERS THROUGH EARLY AFTERNOON.
A CHANCE OF RAIN SHOWERS. WAVES BUILDING TO 5 TO 8 FEET
OCCASIONALLY TO 10 FEET.
.MONDAY NIGHT...SOUTHEAST WINDS 20 TO 30 KNOTS. A CHANCE OF RAIN
SHOWERS. WAVES SUBSIDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.
.TUESDAY...SOUTH WINDS 20 TO 30 KNOTS DIMINISHING TO 10 TO
20 KNOTS BY MID AFTERNOON. A CHANCE OF RAIN SHOWERS. WAVES
SUBSIDING TO 2 TO 4 FEET.
.TUESDAY NIGHT...NORTH WINDS 15 TO 25 KNOTS INCREASING TO 20 TO
30 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN AND SNOW SHOWERS THROUGH
MIDNIGHT...THEN NUMEROUS SNOW SHOWERS...POSSIBLY MIXED WITH RAIN.
WAVES BUILDING TO 6 TO 9 FEET OCCASIONALLY TO 11 FEET.
.WEDNESDAY...NORTHEAST WINDS 20 TO 30 KNOTS BACKING NORTH.
NUMEROUS SNOW SHOWERS...POSSIBLY MIXED WITH RAIN. WAVES BUILDING
TO 8 TO 12 FEET OCCASIONALLY TO 15 FEET.
.THURSDAY...NORTH WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS. SCATTERED SNOW SHOWERS...POSSIBLY MIXED WITH RAIN.
WAVES SUBSIDING TO 2 TO 4 FEET.

$$

LSZ267-231015-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
1009 PM EDT SAT APR 22 2017

.REST OF TONIGHT...SOUTHWEST WINDS 15 TO 25 KNOTS BECOMING WEST
10 TO 20 KNOTS BY MIDNIGHT...THEN BECOMING NORTH 15 TO 25 KNOTS
LATE. RAIN LIKELY...POSSIBLY MIXED WITH SNOW AFTER MIDNIGHT. WAVES
CALM TO 2 FEET BUILDING TO 1 TO 3 FEET.
.SUNDAY...NORTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS IN THE AFTERNOON...THEN BACKING NORTHWEST LATE. A CHANCE
OF SNOW...POSSIBLY MIXED WITH RAIN THROUGH EARLY AFTERNOON. WAVES
BUILDING TO 2 TO 4 FEET...THEN SUBSIDING TO 1 TO 3 FEET.
.SUNDAY NIGHT...NORTH WINDS 10 TO 20 KNOTS VEERING EAST LATE.
SCATTERED SNOW SHOWERS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.MONDAY...EAST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO 30 KNOTS
BY MID AFTERNOON. SCATTERED SNOW SHOWERS...POSSIBLY MIXED WITH
RAIN THROUGH EARLY AFTERNOON. WAVES BUILDING TO 3 TO 5 FEET
OCCASIONALLY TO 7 FEET.
.MONDAY NIGHT...SOUTHEAST WINDS 20 TO 30 KNOTS. WAVES 3 TO 5 FEET
OCCASIONALLY TO 7 FEET.
.TUESDAY...SOUTHEAST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS BY MID AFTERNOON. A CHANCE OF RAIN SHOWERS. WAVES
SUBSIDING TO 1 TO 3 FEET.
.TUESDAY NIGHT...SOUTHEAST WINDS 10 TO 20 KNOTS BACKING EAST
AFTER MIDNIGHT. A CHANCE OF RAIN SHOWERS THROUGH MIDNIGHT...THEN
RAIN SHOWERS LIKELY WITH A CHANCE OF SNOW SHOWERS. WAVES
SUBSIDING TO CALM TO 2 FEET...THEN BUILDING TO 3 TO 5 FEET
OCCASIONALLY TO 7 FEET.
.WEDNESDAY...NORTHEAST WINDS 20 TO 30 KNOTS. NUMEROUS RAIN AND
SNOW SHOWERS. WAVES BUILDING TO 6 TO 10 FEET OCCASIONALLY TO 13
FEET.
.THURSDAY...NORTHWEST WINDS 15 TO 25 KNOTS VEERING NORTH.
SCATTERED SNOW SHOWERS...POSSIBLY MIXED WITH RAIN. WAVES
SUBSIDING TO 2 TO 4 FEET.

$$
LSZ261-231015-
MAFOR 2303/
SUPERIOR WEST 11110 11116 11117 11110 14220. CHANCE OF RAIN LATE
THIS EVENING. CHANCE OF RAIN AND SNOW LATE SUNDAY MORNING THROUGH
SUNDAY EVENING. WAVES 1 TO 3 FEET.

SUPERIOR NORTH CENTRAL 11820 11837 11830 12820 11810 12100.
CHANCE OF SNOW LATE TONIGHT. WAVES 1 TO 5 FEET.

SUPERIOR SOUTH CENTRAL 11820 11720 11827 12820 11810 11110 11100.
CHANCE OF SNOW LATE SUNDAY MORNING. WAVES 1 TO 4 FEET.

SUPERIOR EAST 11620 11720 11836 11830 12820 11720 11810. CHANCE
OF RAIN LATE OVERNIGHT. CHANCE OF SNOW SUNDAY MORNING. WAVES 2 TO
5 FEET.

$$

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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