Great Lakes Forecast
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918
FZUS63 KMQT 290201
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
1001 PM EDT FRI APR 28 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 RIDGE OF 30.4 INCHES WILL BUILD OVER THE UPPER
GREAT LAKES TONIGHT INTO SATURDAY. THIS RIDGE WILL MOVE OVER
EASTERN ONTARIO AND WESTERN QUEBEC BY SUNDAY AND WEAKEN TO 30.3
INCHES...WHILE A 29.6 INCH LOW OVER MISSOURI DEEPENS TO 29.2
INCHES...AND LIFTS OVER IOWA BY MONDAY MORNING. THIS AREA OF LOW
PRESSURE WILL CONTINUE TO LIFT NORTHEAST ACROSS WISCONSIN AND UP
INTO CENTRAL PORTIONS OF UPPER MICHIGAN BY TUESDAY MORNING AS A
29.2 INCH LOW. THE LOW WILL WEAKEN TO AROUND 29.4 INCHES AS IT
LIFTS NORTHEAST INTO QUEBEC BY WEDNESDAY MORNING...LEAVING A
TROUGH OF 29.9 INCHES DRAPED ACROSS THE UPPER GREAT LAKES.

LSZ162-291015-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
1001 PM EDT FRI APR 28 2017 /901 PM CDT FRI APR 28 2017/

.REST OF TONIGHT...NORTHWEST WINDS 5 TO 15 KNOTS VEERING NORTH
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.SATURDAY...NORTH WINDS 5 TO 15 KNOTS VEERING EAST BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
.SATURDAY NIGHT...NORTHEAST WINDS 5 TO 15 KNOTS INCREASING TO
10 TO 20 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.SUNDAY...NORTHEAST WINDS 15 TO 25 KNOTS. A SLIGHT CHANCE OF SNOW
THROUGH EARLY AFTERNOON. A SLIGHT CHANCE OF RAIN. WAVES BUILDING
TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
.SUNDAY NIGHT...NORTHEAST WINDS 20 TO 30 KNOTS INCREASING TO
GALES TO 35 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN THROUGH
MIDNIGHT. A CHANCE OF SNOW. RAIN LIKELY AFTER MIDNIGHT. WAVES
BUILDING TO 5 TO 8 FEET OCCASIONALLY TO 10 FEET.
.MONDAY...NORTHEAST GALES TO 40 KNOTS. RAIN...POSSIBLY MIXED WITH
SNOW. WAVES BUILDING TO 5 TO 9 FEET OCCASIONALLY TO 11 FEET.
.MONDAY NIGHT...NORTH WINDS 20 TO 30 KNOTS. RAIN SHOWERS AND SNOW
SHOWERS LIKELY THROUGH MIDNIGHT...THEN A CHANCE OF RAIN AND SNOW
SHOWERS AFTER MIDNIGHT. WAVES SUBSIDING TO 3 TO 6 FEET
OCCASIONALLY TO 8 FEET.
.TUESDAY...NORTH WINDS 15 TO 25 KNOTS BECOMING NORTHWEST 5 TO
15 KNOTS. A CHANCE OF SNOW SHOWERS. A CHANCE OF RAIN SHOWERS.
WAVES SUBSIDING TO CALM TO 2 FEET.
.WEDNESDAY...SOUTH WINDS 5 TO 15 KNOTS VEERING SOUTHWEST. WAVES
CALM TO 2 FEET.

$$

LSZ263-291015-
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-
1001 PM EDT FRI APR 28 2017

.REST OF TONIGHT...NORTHWEST WINDS 5 TO 15 KNOTS VEERING NORTH
AFTER MIDNIGHT. WAVES 1 TO 3 FEET SUBSIDING TO CALM TO 2 FEET.
.SATURDAY...NORTH WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
.SATURDAY NIGHT...NORTHEAST WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
.SUNDAY...NORTHEAST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS BY MID AFTERNOON. A SLIGHT CHANCE OF RAIN BY MID
AFTERNOON. WAVES BUILDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
.SUNDAY NIGHT...NORTHEAST WINDS 15 TO 25 KNOTS INCREASING TO
GALES TO 35 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN THROUGH
MIDNIGHT. A CHANCE OF SNOW. RAIN LIKELY AFTER MIDNIGHT. WAVES
BUILDING TO 4 TO 7 FEET OCCASIONALLY TO 9 FEET.
.MONDAY...NORTHEAST GALES TO 40 KNOTS. RAIN...POSSIBLY MIXED WITH
SNOW. WAVES BUILDING TO 6 TO 9 FEET OCCASIONALLY TO 11 FEET.
.MONDAY NIGHT...NORTHEAST WINDS 20 TO 30 KNOTS BACKING NORTH
AFTER MIDNIGHT. RAIN SHOWERS AND SNOW SHOWERS LIKELY. WAVES
SUBSIDING TO 4 TO 7 FEET OCCASIONALLY TO 9 FEET.
.TUESDAY...NORTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS. A CHANCE OF RAIN SHOWERS...POSSIBLY MIXED WITH SNOW.
WAVES SUBSIDING TO CALM TO 2 FEET.
.WEDNESDAY...NORTH WINDS 5 TO 15 KNOTS BACKING SOUTHWEST. WAVES
CALM TO 2 FEET.

$$

LSZ264-291015-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
1001 PM EDT FRI APR 28 2017

.REST OF TONIGHT...NORTHWEST WINDS 10 TO 20 KNOTS. WAVES 2 TO
4 FEET SUBSIDING TO 1 TO 3 FEET.
.SATURDAY...NORTHWEST WINDS 5 TO 15 KNOTS. WAVES SUBSIDING TO
CALM TO 2 FEET.
.SATURDAY NIGHT...NORTHEAST WINDS 5 TO 15 KNOTS VEERING EAST
AFTER MIDNIGHT. WAVES BUILDING TO 1 TO 3 FEET.
.SUNDAY...EAST WINDS 5 TO 15 KNOTS BACKING NORTHEAST BY MID
AFTERNOON. A SLIGHT CHANCE OF RAIN BY MID AFTERNOON. WAVES
SUBSIDING TO CALM TO 2 FEET.
.SUNDAY NIGHT...NORTHEAST WINDS 10 TO 20 KNOTS BECOMING EAST
20 TO 30 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN. A CHANCE OF SNOW
AFTER MIDNIGHT. WAVES BUILDING TO 3 TO 5 FEET OCCASIONALLY TO
7 FEET.
.MONDAY...NORTHEAST GALES TO 35 KNOTS. SNOW LIKELY THROUGH EARLY
AFTERNOON. RAIN. A CHANCE OF SNOW BY MID AFTERNOON. WAVES
BUILDING TO 6 TO 9 FEET OCCASIONALLY TO 11 FEET.
.MONDAY NIGHT...NORTHEAST WINDS 20 TO 30 KNOTS. RAIN SHOWERS...
POSSIBLY MIXED WITH SNOW SHOWERS. WAVES SUBSIDING TO 4 TO 7 FEET
OCCASIONALLY TO 9 FEET.
.TUESDAY...NORTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS. A CHANCE OF RAIN SHOWERS...POSSIBLY MIXED WITH SNOW.
WAVES SUBSIDING TO 1 TO 3 FEET.
.WEDNESDAY...NORTH WINDS 5 TO 15 KNOTS BACKING SOUTHWEST. WAVES
SUBSIDING TO CALM TO 2 FEET.

$$

LSZ265-291015-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
1001 PM EDT FRI APR 28 2017

.REST OF TONIGHT...NORTHWEST WINDS 15 TO 25 KNOTS DIMINISHING TO
10 TO 20 KNOTS AFTER MIDNIGHT. WAVES 1 TO 3 FEET.
.SATURDAY...NORTH WINDS 10 TO 20 KNOTS. WAVES SUBSIDING TO CALM
TO 2 FEET.
.SATURDAY NIGHT...NORTHEAST WINDS 10 TO 20 KNOTS VEERING EAST
AFTER MIDNIGHT. WAVES BUILDING TO 1 TO 3 FEET.
.SUNDAY...EAST WINDS 10 TO 20 KNOTS BACKING NORTHEAST BY MID
AFTERNOON. A SLIGHT CHANCE OF RAIN...POSSIBLY MIXED WITH SNOW BY
MID AFTERNOON. WAVES 1 TO 3 FEET.
.SUNDAY NIGHT...EAST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO
30 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN...POSSIBLY MIXED WITH
SNOW THROUGH MIDNIGHT...THEN RAIN LIKELY AFTER MIDNIGHT. WAVES
SUBSIDING TO CALM TO 2 FEET...THEN BUILDING TO 3 TO 6 FEET
OCCASIONALLY TO 8 FEET.
.MONDAY...EAST WINDS 20 TO 30 KNOTS. RAIN. WAVES BUILDING TO 4 TO
7 FEET OCCASIONALLY TO 9 FEET...THEN SUBSIDING TO 3 TO 6 FEET
OCCASIONALLY TO 8 FEET.
.MONDAY NIGHT...EAST WINDS 10 TO 20 KNOTS. A CHANCE OF RAIN
SHOWERS THROUGH MIDNIGHT...THEN RAIN SHOWERS...POSSIBLY MIXED
WITH SNOW AFTER MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET...THEN
BUILDING TO 2 TO 4 FEET.
.TUESDAY...NORTH WINDS 15 TO 25 KNOTS. A CHANCE OF RAIN AND SNOW
SHOWERS. WAVES BUILDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET...
THEN SUBSIDING TO 1 TO 3 FEET.
.WEDNESDAY...NORTH WINDS 10 TO 20 KNOTS VEERING SOUTH. WAVES
SUBSIDING TO CALM TO 2 FEET.

$$

LSZ266-291015-
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-
1001 PM EDT FRI APR 28 2017

.REST OF TONIGHT...NORTHWEST WINDS 15 TO 25 KNOTS. WAVES 3 TO
5 FEET OCCASIONALLY TO 7 FEET SUBSIDING TO 2 TO 4 FEET...THEN
BUILDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
.SATURDAY...NORTH WINDS 10 TO 20 KNOTS. WAVES SUBSIDING TO CALM
TO 2 FEET.
.SATURDAY NIGHT...NORTH WINDS 10 TO 20 KNOTS VEERING EAST AFTER
MIDNIGHT. WAVES BUILDING TO 1 TO 3 FEET.
.SUNDAY...EAST WINDS 15 TO 25 KNOTS BECOMING NORTHEAST 10 TO
20 KNOTS BY MID AFTERNOON. A SLIGHT CHANCE OF RAIN BY MID
AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.SUNDAY NIGHT...EAST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO
30 KNOTS AFTER MIDNIGHT. A CHANCE OF SNOW THROUGH MIDNIGHT. A
CHANCE OF RAIN. WAVES BUILDING TO 3 TO 6 FEET OCCASIONALLY TO
8 FEET.
.MONDAY...EAST WINDS 20 TO 30 KNOTS. RAIN. WAVES BUILDING TO 4 TO
7 FEET OCCASIONALLY TO 9 FEET.
.MONDAY NIGHT...SOUTHEAST WINDS 15 TO 25 KNOTS BACKING NORTHEAST
AFTER MIDNIGHT. RAIN SHOWERS LIKELY. SNOW SHOWERS LIKELY AFTER
MIDNIGHT. WAVES SUBSIDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.
.TUESDAY...NORTH WINDS 15 TO 25 KNOTS. A CHANCE OF RAIN SHOWERS...
POSSIBLY MIXED WITH SNOW. WAVES SUBSIDING TO 1 TO 3 FEET.
.WEDNESDAY...NORTH WINDS 10 TO 20 KNOTS BACKING SOUTHWEST. WAVES
SUBSIDING TO CALM TO 2 FEET.

$$

LSZ267-291015-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
1001 PM EDT FRI APR 28 2017

.REST OF TONIGHT...NORTHWEST WINDS 15 TO 25 KNOTS. WAVES 3 TO
5 FEET OCCASIONALLY TO 7 FEET SUBSIDING TO 2 TO 4 FEET.
.SATURDAY...NORTHWEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.SATURDAY NIGHT...NORTH WINDS 10 TO 20 KNOTS VEERING EAST AFTER
MIDNIGHT. WAVES CALM TO 2 FEET.
.SUNDAY...EAST WINDS 10 TO 20 KNOTS BACKING NORTHEAST BY MID
AFTERNOON. A SLIGHT CHANCE OF RAIN BY MID AFTERNOON. WAVES CALM
TO 2 FEET.
.SUNDAY NIGHT...EAST WINDS 10 TO 20 KNOTS INCREASING TO 20 TO
30 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN...POSSIBLY MIXED WITH
SNOW THROUGH MIDNIGHT...THEN RAIN LIKELY AFTER MIDNIGHT. WAVES
BUILDING TO 2 TO 4 FEET.
.MONDAY...EAST WINDS 20 TO 30 KNOTS BECOMING SOUTHEAST 15 TO
25 KNOTS BY MID AFTERNOON. RAIN. WAVES BUILDING TO 3 TO 5 FEET
OCCASIONALLY TO 7 FEET...THEN SUBSIDING TO 1 TO 3 FEET.
.MONDAY NIGHT...SOUTHEAST WINDS 10 TO 20 KNOTS VEERING SOUTH
AFTER MIDNIGHT. A CHANCE OF RAIN SHOWERS THROUGH MIDNIGHT...THEN
RAIN SHOWERS LIKELY AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO
2 FEET.
.TUESDAY...NORTH WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS. A CHANCE OF RAIN SHOWERS...POSSIBLY MIXED WITH SNOW.
WAVES BUILDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET...THEN
SUBSIDING TO 1 TO 3 FEET.
.WEDNESDAY...NORTHWEST WINDS 10 TO 20 KNOTS. WAVES SUBSIDING TO
CALM TO 2 FEET.

$$
LSZ261-291015-
MAFOR 2903/
SUPERIOR WEST 12710 11810 11800 11700 11800 11200 11210. WAVES 1
FOOT OR LESS.

SUPERIOR NORTH CENTRAL 12720 12820 12710 11700 11800. WAVES 2 TO
4 FEET OVERNIGHT. WAVES 1 TO 3 FEET SATURDAY. WAVES 1 FOOT OR
LESS SATURDAY EVENING.

SUPERIOR SOUTH CENTRAL 12720 12820 11710 13810. WAVES 2 TO 4 FEET
OVERNIGHT. WAVES 2 TO 4 FEET SUBSIDING TO 1 TO 3 FEET SATURDAY.
WAVES 1 TO 2 FEET SATURDAY EVENING.

SUPERIOR EAST 13730 11820 13710 11810. WAVES 3 TO 5 FEET
OVERNIGHT. WAVES 3 TO 5 FEET SUBSIDING TO 2 TO 3 FEET SATURDAY.
WAVES AROUND 2 FEET SATURDAY EVENING.

$$

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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