Great Lakes Forecast
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498
FZUS63 KMQT 240206
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
1006 PM EDT SUN APR 23 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 30.1 INCH RIDGE OVER NORTHERN ONTARIO WILL SHIFT
EASTWARD TO QUEBEC THROUGH MONDAY AS A 29.4 INCH LOW PRESSURE OVER
THE CENTRAL PLAINS LIFTS A 29.7 INCH TROUGH NORTHWARD ACROSS LAKE
SUPERIOR. BY TUESDAY...THE LOW WILL DEVOLVE INTO AN ELONGATED
TROUGH FROM NORTHERN ONTARIO TO THE MID MISSISSIPPI VALLEY...WHERE
IT WILL REMAIN THROUGH WEDNESDAY. A 29.3 INCH LOW WILL ORGANIZE
ALONG THIS TROUGH OVER NORTHERN ILLINOIS WEDNESDAY
AFTERNOON...THEN LIFT NORTHWARD ACROSS UPPER MICHIGAN ON THURSDAY.
AS THE LOW EXITS INTO QUEBEC THURSDAY NIGHT AND FRIDAY...A 30.3
INCH RIDGE WILL BUILD OVER THE UPPER GREAT LAKES.

LSZ162-241015-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
1006 PM EDT SUN APR 23 2017 /906 PM CDT SUN APR 23 2017/

.REST OF TONIGHT...EAST WINDS 10 TO 20 KNOTS INCREASING TO 20 TO
30 KNOTS. ISOLATED SNOW SHOWERS THROUGH MIDNIGHT...THEN SCATTERED
SNOW SHOWERS. WAVES 1 TO 3 FEET BUILDING TO 4 TO 7 FEET
OCCASIONALLY TO 9 FEET.
.MONDAY...EAST WINDS 20 TO 30 KNOTS. A SLIGHT CHANCE OF SNOW
SHOWERS THROUGH MID MORNING. A CHANCE OF RAIN SHOWERS BY MID
AFTERNOON. WAVES BUILDING TO 6 TO 9 FEET OCCASIONALLY TO 11 FEET.
.MONDAY NIGHT...EAST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS AFTER MIDNIGHT...THEN VEERING SOUTH LATE. RAIN LIKELY
THROUGH MIDNIGHT...THEN A CHANCE OF RAIN. WAVES SUBSIDING TO 3 TO
5 FEET OCCASIONALLY TO 7 FEET.
.TUESDAY...WEST WINDS 5 TO 15 KNOTS VEERING NORTHWEST BY MID
AFTERNOON. A CHANCE OF RAIN. WAVES SUBSIDING TO 1 TO 3 FEET.
.TUESDAY NIGHT...NORTH WINDS 20 TO 30 KNOTS VEERING NORTHEAST
AFTER MIDNIGHT. RAIN LIKELY. SLEET LIKELY AFTER MIDNIGHT. WAVES
BUILDING TO 5 TO 8 FEET OCCASIONALLY TO 10 FEET.
.WEDNESDAY...NORTHEAST WINDS 20 TO 30 KNOTS INCREASING TO GALES
TO 35 KNOTS BY MID AFTERNOON. SNOW...POSSIBLY MIXED WITH RAIN AND
SLEET THROUGH EARLY AFTERNOON. A CHANCE OF SNOW BY MID AFTERNOON.
WAVES BUILDING TO 7 TO 10 FEET OCCASIONALLY TO 13 FEET.
.WEDNESDAY NIGHT...NORTHEAST GALES TO 35 KNOTS. A CHANCE OF SNOW
THROUGH MIDNIGHT...THEN SNOW LIKELY. WAVES 7 TO 11 FEET
OCCASIONALLY TO 14 FEET.
.THURSDAY...NORTH WINDS 20 TO 30 KNOTS BECOMING WEST 10 TO
20 KNOTS. A CHANCE OF SNOW...POSSIBLY MIXED WITH RAIN. WAVES
SUBSIDING TO 1 TO 3 FEET.
.FRIDAY...WEST WINDS 10 TO 20 KNOTS VEERING NORTHEAST. WAVES
SUBSIDING TO CALM TO 2 FEET.

$$

LSZ263-241015-
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-
1006 PM EDT SUN APR 23 2017

.REST OF TONIGHT...EAST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS LATE. SCATTERED SNOW SHOWERS. WAVES 1 TO 3 FEET BUILDING
TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
.MONDAY...EAST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO 30 KNOTS
IN THE AFTERNOON. A SLIGHT CHANCE OF SNOW SHOWERS IN THE MORNING.
A CHANCE OF RAIN SHOWERS LATE. WAVES BUILDING TO 7 TO 10 FEET
OCCASIONALLY TO 13 FEET.
.MONDAY NIGHT...SOUTHEAST WINDS 20 TO 30 KNOTS DIMINISHING TO
15 TO 25 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN. WAVES SUBSIDING
TO 4 TO 7 FEET OCCASIONALLY TO 9 FEET.
.TUESDAY...SOUTH WINDS 10 TO 20 KNOTS BECOMING NORTH 5 TO
15 KNOTS BY MID AFTERNOON. A CHANCE OF RAIN. WAVES SUBSIDING TO
2 TO 4 FEET.
.TUESDAY NIGHT...NORTH WINDS 20 TO 30 KNOTS BECOMING NORTHEAST
GALES TO 35 KNOTS AFTER MIDNIGHT. RAIN OR FREEZING RAIN. SLEET
LIKELY AFTER MIDNIGHT. WAVES BUILDING TO 6 TO 9 FEET OCCASIONALLY
TO 11 FEET.
.WEDNESDAY...NORTHEAST GALES TO 35 KNOTS. SNOW...POSSIBLY MIXED
WITH RAIN THROUGH EARLY AFTERNOON. SLEET LIKELY. A CHANCE OF SNOW
BY MID AFTERNOON. WAVES BUILDING TO 8 TO 11 FEET OCCASIONALLY TO
14 FEET.
.WEDNESDAY NIGHT...NORTHEAST GALES TO 35 KNOTS. A CHANCE OF
FREEZING RAIN THROUGH MIDNIGHT. SNOW LIKELY. WAVES 8 TO 11 FEET
OCCASIONALLY TO 14 FEET.
.THURSDAY...NORTH GALES TO 35 KNOTS BECOMING WEST 10 TO 20 KNOTS.
A CHANCE OF SNOW...POSSIBLY MIXED WITH RAIN. WAVES SUBSIDING TO
2 TO 4 FEET.
.FRIDAY...WEST WINDS 5 TO 15 KNOTS VEERING NORTHEAST. WAVES
SUBSIDING TO CALM TO 2 FEET.

$$

LSZ264-241015-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
1006 PM EDT SUN APR 23 2017

.REST OF TONIGHT...EAST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS LATE. ISOLATED SNOW SHOWERS THROUGH MIDNIGHT...THEN
SCATTERED SNOW SHOWERS. WAVES CALM TO 2 FEET.
.MONDAY...EAST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO 30 KNOTS
WITH A FEW GALE FORCE GUSTS TO 35 KNOTS IN THE AFTERNOON. A
CHANCE OF SNOW SHOWERS...POSSIBLY MIXED WITH RAIN. WAVES BUILDING
TO 7 TO 10 FEET OCCASIONALLY TO 13 FEET.
.MONDAY NIGHT...SOUTHEAST WINDS 20 TO 30 KNOTS. A FEW GALE FORCE
GUSTS TO 35 KNOTS IN THE EVENING. A CHANCE OF RAIN. WAVES
BUILDING TO 8 TO 11 FEET OCCASIONALLY TO 14 FEET...THEN SUBSIDING
TO 5 TO 8 FEET OCCASIONALLY TO 10 FEET.
.TUESDAY...SOUTH WINDS 15 TO 25 KNOTS DIMINISHING TO 5 TO
15 KNOTS BY MID AFTERNOON. A CHANCE OF RAIN. WAVES SUBSIDING TO
2 TO 4 FEET.
.TUESDAY NIGHT...NORTH WINDS 20 TO 30 KNOTS BECOMING NORTHEAST
GALES TO 35 KNOTS AFTER MIDNIGHT. RAIN OR FREEZING RAIN. WAVES
BUILDING TO 7 TO 10 FEET OCCASIONALLY TO 13 FEET.
.WEDNESDAY...NORTHEAST GALES TO 35 KNOTS. RAIN THROUGH EARLY
AFTERNOON. SNOW AND SLEET LIKELY BY MID AFTERNOON. WAVES BUILDING
TO 8 TO 11 FEET OCCASIONALLY TO 14 FEET.
.WEDNESDAY NIGHT...NORTHEAST GALES TO 35 KNOTS. SNOW LIKELY.
WAVES BUILDING TO 9 TO 12 FEET OCCASIONALLY TO 15 FEET.
.THURSDAY...NORTHEAST GALES TO 35 KNOTS BECOMING WEST 10 TO
20 KNOTS. SNOW LIKELY. A CHANCE OF RAIN. WAVES SUBSIDING TO 3 TO
6 FEET OCCASIONALLY TO 8 FEET.
.FRIDAY...WEST WINDS 10 TO 20 KNOTS BECOMING NORTH 5 TO 15 KNOTS.
WAVES SUBSIDING TO CALM TO 2 FEET.

$$

LSZ265-241015-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
1006 PM EDT SUN APR 23 2017

.REST OF TONIGHT...NORTHEAST WINDS 5 TO 15 KNOTS BECOMING EAST
10 TO 20 KNOTS AFTER MIDNIGHT. ISOLATED SNOW SHOWERS AFTER
MIDNIGHT. WAVES CALM TO 2 FEET.
.MONDAY...EAST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO 30 KNOTS
IN THE AFTERNOON. A SLIGHT CHANCE OF RAIN SHOWERS LATE. WAVES
BUILDING TO 5 TO 8 FEET OCCASIONALLY TO 10 FEET.
.MONDAY NIGHT...SOUTHEAST WINDS 20 TO 30 KNOTS DIMINISHING TO
15 TO 25 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN. WAVES SUBSIDING
TO 4 TO 7 FEET OCCASIONALLY TO 9 FEET.
.TUESDAY...SOUTHEAST WINDS 15 TO 25 KNOTS DIMINISHING TO 5 TO
15 KNOTS BY MID AFTERNOON. A CHANCE OF RAIN. WAVES SUBSIDING TO
1 TO 3 FEET.
.TUESDAY NIGHT...NORTH WINDS 10 TO 20 KNOTS INCREASING TO 20 TO
30 KNOTS AFTER MIDNIGHT. RAIN. WAVES SUBSIDING TO CALM TO
2 FEET...THEN BUILDING TO 5 TO 8 FEET OCCASIONALLY TO 10 FEET.
.WEDNESDAY...NORTH GALES TO 35 KNOTS VEERING NORTHEAST BY MID
AFTERNOON. RAIN. SLEET LIKELY BY LATE AFTERNOON. WAVES BUILDING
TO 8 TO 11 FEET OCCASIONALLY TO 14 FEET.
.WEDNESDAY NIGHT...NORTHEAST GALES TO 35 KNOTS. RAIN...POSSIBLY
MIXED WITH SLEET THROUGH MIDNIGHT. SNOW LIKELY. WAVES 8 TO 12
FEET OCCASIONALLY TO 15 FEET.
.THURSDAY...NORTH WINDS 20 TO 30 KNOTS BECOMING WEST 15 TO
25 KNOTS. SNOW LIKELY. A CHANCE OF RAIN. WAVES SUBSIDING TO 2 TO
4 FEET.
.FRIDAY...WEST WINDS 10 TO 20 KNOTS VEERING NORTHEAST. WAVES
SUBSIDING TO CALM TO 2 FEET.

$$

LSZ266-241015-
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-
1006 PM EDT SUN APR 23 2017

.REST OF TONIGHT...NORTH WINDS 5 TO 15 KNOTS BECOMING NORTHEAST
10 TO 20 KNOTS AFTER MIDNIGHT...THEN VEERING EAST LATE. SCATTERED
SNOW SHOWERS...POSSIBLY MIXED WITH RAIN AFTER MIDNIGHT. WAVES 1 TO
3 FEET SUBSIDING TO CALM TO 2 FEET.
.MONDAY...EAST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO 30 KNOTS
WITH A FEW GALE FORCE GUSTS TO 35 KNOTS IN THE AFTERNOON. A
SLIGHT CHANCE OF RAIN AND SNOW SHOWERS IN THE MORNING. WAVES
BUILDING TO 6 TO 9 FEET OCCASIONALLY TO 11 FEET.
.MONDAY NIGHT...SOUTHEAST WINDS 20 TO 30 KNOTS. A FEW GALE FORCE
GUSTS TO 35 KNOTS IN THE EVENING. A SLIGHT CHANCE OF RAIN. WAVES
SUBSIDING TO 5 TO 8 FEET OCCASIONALLY TO 10 FEET.
.TUESDAY...SOUTHEAST WINDS 20 TO 30 KNOTS DIMINISHING TO 10 TO
20 KNOTS BY MID AFTERNOON. A CHANCE OF RAIN. WAVES SUBSIDING TO
2 TO 4 FEET.
.TUESDAY NIGHT...SOUTHEAST WINDS 15 TO 25 KNOTS BECOMING
NORTHEAST GALES TO 35 KNOTS AFTER MIDNIGHT. RAIN. WAVES SUBSIDING
TO 1 TO 3 FEET...THEN BUILDING TO 6 TO 9 FEET OCCASIONALLY TO
11 FEET.
.WEDNESDAY...NORTHEAST GALES TO 35 KNOTS. FREEZING RAIN THROUGH
EARLY AFTERNOON. RAIN. SLEET LIKELY BY LATE AFTERNOON. WAVES
BUILDING TO 8 TO 11 FEET OCCASIONALLY TO 14 FEET.
.WEDNESDAY NIGHT...NORTHEAST GALES TO 35 KNOTS. SNOW...POSSIBLY
MIXED WITH RAIN. WAVES 8 TO 12 FEET OCCASIONALLY TO 15 FEET.
.THURSDAY...NORTHEAST GALES TO 35 KNOTS BECOMING WEST 15 TO
25 KNOTS. SNOW LIKELY. A CHANCE OF RAIN. WAVES SUBSIDING TO 3 TO
5 FEET OCCASIONALLY TO 7 FEET.
.FRIDAY...WEST WINDS 15 TO 25 KNOTS BECOMING NORTH 10 TO
20 KNOTS. A CHANCE OF SNOW. WAVES SUBSIDING TO CALM TO 2 FEET.

$$

LSZ267-241015-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
1006 PM EDT SUN APR 23 2017

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

$$
LSZ261-241015-
MAFOR 2403/
SUPERIOR WEST 11220 11230 14240 11240 11246. SCATTERED SNOW
SHOWERS OVERNIGHT. WAVES 2 TO 6 FEET OVERNIGHT BUILDING TO 5 TO 9
FEET MONDAY AND MONDAY EVENING.

SUPERIOR NORTH CENTRAL 11110 11210 11220 11230 13240 11340 19350.
SCATTERED SNOW SHOWERS OVERNIGHT THROUGH MID MORNING MONDAY.
CHANCE OF RAIN MONDAY EVENING. WAVES 1 TO 2 FEET OVERNIGHT
BUILDING TO 6 TO 10 FEET MONDAY AND MONDAY EVENING.

SUPERIOR SOUTH CENTRAL 11100 11210 11220 14230 11340. WAVES 1 TO
2 FEET OVERNIGHT BUILDING TO 3 TO 6 FEET MONDAY AND MONDAY
EVENING.

SUPERIOR EAST 11800 11110 11210 11230 12240 11340 11340 19350.
SCATTERED SNOW SHOWERS LATE OVERNIGHT THROUGH MID MORNING MONDAY.
WAVES 1 TO 2 FEET OVERNIGHT BUILDING TO 4 TO 8 FEET MONDAY AND
MONDAY EVENING.

$$

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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