Great Lakes Forecast
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283
FZUS63 KMQT 280756
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
356 AM 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 LOW PRESSURE SYSTEM OF 29.3 INCHES WILL CONTINUE TO
LIFT NORTH TOWARDS THE HUDSON BAY TODAY. A RIDGE BUILDS FROM 30.0
INCHES TO 30.4 INCHES 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 EASTERN 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.

LSZ162-281600-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
356 AM EDT FRI APR 28 2017 /256 AM CDT FRI APR 28 2017/

.EARLY THIS MORNING...WEST WINDS 15 TO 25 KNOTS. WAVES 2 TO
4 FEET.
.TODAY...WEST WINDS 15 TO 25 KNOTS. WAVES SUBSIDING TO CALM TO
2 FEET.
.TONIGHT...NORTHWEST WINDS 10 TO 20 KNOTS BECOMING NORTH 5 TO
15 KNOTS 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 INCREASING TO 20 TO
30 KNOTS BY MID AFTERNOON. 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 AND SNOW.
WAVES BUILDING TO 5 TO 8 FEET OCCASIONALLY TO 10 FEET.
.MONDAY...NORTHEAST GALES TO 40 KNOTS BECOMING NORTH 20 TO
30 KNOTS. RAIN...POSSIBLY MIXED WITH SNOW. WAVES BUILDING TO 7 TO
10 FEET OCCASIONALLY TO 13 FEET...THEN SUBSIDING TO 3 TO 6 FEET
OCCASIONALLY TO 8 FEET.
.TUESDAY...NORTHWEST 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.

$$

LSZ263-281600-
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-
356 AM EDT FRI APR 28 2017

.EARLY THIS MORNING...WEST WINDS 15 TO 25 KNOTS. ISOLATED SNOW
SHOWERS. WAVES 3 TO 6 FEET OCCASIONALLY TO 8 FEET.
.TODAY...WEST WINDS 20 TO 30 KNOTS. A SLIGHT CHANCE OF RAIN AND
SNOW SHOWERS. WAVES SUBSIDING TO 3 TO 5 FEET OCCASIONALLY TO
7 FEET.
.TONIGHT...NORTHWEST WINDS 10 TO 20 KNOTS BECOMING NORTH 5 TO
15 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET.
.SATURDAY...NORTH WINDS 5 TO 15 KNOTS. WAVES SUBSIDING TO 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. 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...POSSIBLY
MIXED WITH SNOW. WAVES BUILDING TO 5 TO 8 FEET OCCASIONALLY TO
10 FEET.
.MONDAY...NORTHEAST GALES TO 40 KNOTS DIMINISHING TO 20 TO
30 KNOTS. RAIN LIKELY...POSSIBLY MIXED WITH SNOW EARLY. WAVES
BUILDING TO 7 TO 10 FEET OCCASIONALLY TO 13 FEET...THEN SUBSIDING
TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.
.TUESDAY...NORTH WINDS 20 TO 30 KNOTS DIMINISHING TO 10 TO
20 KNOTS. A CHANCE OF RAIN AND SNOW SHOWERS. WAVES SUBSIDING TO
CALM TO 2 FEET.

$$

LSZ264-281600-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
356 AM EDT FRI APR 28 2017

.EARLY THIS MORNING...WEST WINDS 20 TO 30 KNOTS. ISOLATED SNOW
SHOWERS. WAVES 3 TO 6 FEET OCCASIONALLY TO 8 FEET.
.TODAY...WEST WINDS 20 TO 30 KNOTS. A CHANCE OF RAIN AND SNOW
SHOWERS. WAVES BUILDING TO 4 TO 7 FEET OCCASIONALLY TO 9 FEET...
THEN SUBSIDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.
.TONIGHT...NORTHWEST WINDS 10 TO 20 KNOTS. WAVES SUBSIDING TO
2 TO 4 FEET.
.SATURDAY...NORTHWEST WINDS 5 TO 15 KNOTS. WAVES SUBSIDING TO
CALM TO 2 FEET.
.SATURDAY NIGHT...NORTH WINDS 5 TO 15 KNOTS VEERING NORTHEAST
AFTER MIDNIGHT. WAVES BUILDING TO 1 TO 3 FEET.
.SUNDAY...EAST WINDS 10 TO 20 KNOTS BACKING NORTHEAST BY MID
AFTERNOON. WAVES 1 TO 3 FEET.
.SUNDAY NIGHT...NORTHEAST WINDS 15 TO 25 KNOTS BECOMING EAST
GALES TO 35 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN...POSSIBLY
MIXED WITH SNOW AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO
2 FEET...THEN BUILDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.
.MONDAY...NORTHEAST GALES TO 40 KNOTS. RAIN...POSSIBLY MIXED WITH
SNOW. WAVES BUILDING TO 7 TO 10 FEET OCCASIONALLY TO 13 FEET...
THEN SUBSIDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.
.TUESDAY...NORTH WINDS 20 TO 30 KNOTS DIMINISHING TO 10 TO
20 KNOTS. A CHANCE OF SNOW SHOWERS...POSSIBLY MIXED WITH RAIN.
WAVES SUBSIDING TO 1 TO 3 FEET.

$$

LSZ265-281600-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
356 AM EDT FRI APR 28 2017

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

$$

LSZ266-281600-
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-
356 AM EDT FRI APR 28 2017

.EARLY THIS MORNING...WEST WINDS 20 TO 30 KNOTS. SCATTERED SNOW
SHOWERS. WAVES 3 TO 6 FEET OCCASIONALLY TO 8 FEET BUILDING TO
4 TO 7 FEET OCCASIONALLY TO 9 FEET.
.TODAY...WEST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO 30 KNOTS
BY MID AFTERNOON. A SLIGHT CHANCE OF RAIN AND SNOW SHOWERS. WAVES
SUBSIDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET...THEN BUILDING
TO 4 TO 7 FEET OCCASIONALLY TO 9 FEET.
.TONIGHT...NORTHWEST WINDS 15 TO 25 KNOTS. WAVES SUBSIDING 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 NORTHEAST
AFTER MIDNIGHT. WAVES BUILDING TO 1 TO 3 FEET.
.SUNDAY...EAST WINDS 15 TO 25 KNOTS BACKING NORTHEAST BY MID
AFTERNOON. WAVES BUILDING TO 2 TO 4 FEET...THEN SUBSIDING TO 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 AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET...THEN
BUILDING TO 4 TO 7 FEET OCCASIONALLY TO 9 FEET.
.MONDAY...EAST GALES TO 35 KNOTS BECOMING SOUTHEAST 15 TO
25 KNOTS. RAIN LIKELY. WAVES BUILDING TO 6 TO 9 FEET OCCASIONALLY
TO 11 FEET...THEN SUBSIDING TO 3 TO 5 FEET OCCASIONALLY TO 7
FEET.
.TUESDAY...NORTH WINDS 15 TO 25 KNOTS BACKING NORTHWEST. A CHANCE
OF RAIN AND SNOW SHOWERS. WAVES SUBSIDING TO 1 TO 3 FEET.

$$

LSZ267-281600-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
356 AM EDT FRI APR 28 2017

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

$$

LSZ261-281600-
MAFOR 2809/
SUPERIOR WEST 14630 11620 13710. WAVES 1 TO 5 FEET.

SUPERIOR NORTH CENTRAL 14640 11640 12730 11720. SCATTERED SNOW
SHOWERS WITH A CHANCE OF RAIN SHOWERS EARLY THIS AFTERNOON. WAVES
4 TO 7 FEET TODAY...SUBSIDING TO 3 TO 5 FEET TONIGHT.

SUPERIOR SOUTH CENTRAL 14630 11630 11620 12720. WAVES 3 TO 5 FEET.

SUPERIOR EAST 13540 13630 11730 11720. SCATTERED SNOW SHOWERS
EARLY THIS MORNING. WAVES 3 TO 7 FEET.

$$

RITZMAN

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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