Great Lakes Forecast
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859
FZUS63 KMQT 250211
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
1011 PM EDT MON APR 24 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 29.5 INCH LOW PRESSURE OVER THE CENTRAL PLAINS WILL
LIFT A 29.7 INCH TROUGH NORTHWARD ACROSS WESTERN LAKE SUPERIOR
TONIGHT. ON TUESDAY...THE LOW WILL DEVOLVE INTO AN ELONGATED
TROUGH FROM NORTHERN ONTARIO TO THE MID MISSISSIPPI VALLEY...WHERE
IT WILL REMAIN THROUGH WEDNESDAY. A 29.4 INCH LOW WILL ORGANIZE
ALONG THIS TROUGH OVER NORTHERN WISCONSIN WEDNESDAY
AFTERNOON...THEN LIFT NORTHWARD ACROSS UPPER MICHIGAN ON THURSDAY.
AS THE LOW EXITS INTO QUEBEC THURSDAY NIGHT AND FRIDAY...A 30.1
INCH RIDGE BUILDS OVER THE UPPER GREAT LAKES. THE RIDGE BUILDS TO
30.3 INCHES OVER THE UPPER GREAT LAKES ON SATURDAY WHILE A 29.6
INCH LOW DEVELOPS OVER THE SOUTHERN PLAINS.

LSZ162-251015-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
1011 PM EDT MON APR 24 2017 /911 PM CDT MON APR 24 2017/

...GALE WATCH IN EFFECT FROM TUESDAY EVENING THROUGH WEDNESDAY
EVENING...

.REST OF TONIGHT...NORTHEAST WINDS 15 TO 25 KNOTS BECOMING
SOUTHEAST 10 TO 20 KNOTS LATE. A CHANCE OF RAIN. WAVES 5 TO
8 FEET OCCASIONALLY TO 10 FEET SUBSIDING TO 3 TO 5 FEET
OCCASIONALLY TO 7 FEET.
.TUESDAY...NORTHEAST WINDS 5 TO 15 KNOTS INCREASING TO 15 TO
25 KNOTS LATE. A CHANCE OF RAIN. WAVES SUBSIDING TO 1 TO 3
FEET...THEN BUILDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
.TUESDAY NIGHT...NORTHEAST GALES TO 40 KNOTS. RAIN. WAVES
BUILDING TO 9 TO 12 FEET OCCASIONALLY TO 15 FEET.
.WEDNESDAY...NORTHEAST GALES TO 40 KNOTS. RAIN OR FREEZING
RAIN...POSSIBLY MIXED WITH SLEET. CHANCE OF SNOW BY MID AFTERNOON.
WAVES BUILDING TO 10 TO 14 FEET OCCASIONALLY TO 18 FEET...THEN
SUBSIDING TO 6 TO 9 FEET OCCASIONALLY TO 11 FEET.
.WEDNESDAY NIGHT...NORTHEAST WINDS 20 TO 30 KNOTS BECOMING NORTH
15 TO 25 KNOTS AFTER MIDNIGHT. A CHANCE OF FREEZING RAIN. WAVES
SUBSIDING TO 4 TO 7 FEET OCCASIONALLY TO 9 FEET.
.THURSDAY...NORTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS BY MID AFTERNOON. A CHANCE OF FREEZING RAIN IN THE
MORNING. RAIN LIKELY IN THE AFTERNOON. WAVES SUBSIDING TO 2 TO 4
FEET.
.THURSDAY NIGHT...NORTHWEST WINDS 15 TO 25 KNOTS BECOMING WEST
10 TO 20 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN THROUGH MIDNIGHT.
A CHANCE OF SNOW. WAVES BUILDING TO 3 TO 5 FEET OCCASIONALLY TO
7 FEET.
.FRIDAY...WEST WINDS 10 TO 20 KNOTS VEERING NORTH. WAVES
SUBSIDING TO CALM TO 2 FEET.
.SATURDAY...NORTHEAST WINDS 10 TO 20 KNOTS. A CHANCE OF RAIN AND
SNOW. WAVES BUILDING TO 2 TO 4 FEET.

$$

LSZ263-251015-
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-
1011 PM EDT MON APR 24 2017

...GALE WATCH IN EFFECT FROM TUESDAY EVENING THROUGH WEDNESDAY
EVENING...

.REST OF TONIGHT...EAST WINDS 20 TO 30 KNOTS BECOMING SOUTHEAST
10 TO 20 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF RAIN. WAVES 7
TO 10 FEET OCCASIONALLY TO 13 FEET SUBSIDING TO 3 TO 5 FEET
OCCASIONALLY TO 7 FEET.
.TUESDAY...SOUTHEAST WINDS 10 TO 20 KNOTS BECOMING NORTHEAST 5 TO
15 KNOTS IN THE AFTERNOON...THEN INCREASING TO 15 TO 25 KNOTS
LATE. A CHANCE OF RAIN. WAVES SUBSIDING TO 2 TO 4 FEET...THEN
BUILDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
.TUESDAY NIGHT...NORTHEAST GALES TO 35 KNOTS INCREASING TO GALES
TO 40 KNOTS AFTER MIDNIGHT. RAIN. A CHANCE OF FREEZING RAIN AFTER
MIDNIGHT. WAVES BUILDING TO 9 TO 12 FEET OCCASIONALLY TO 15 FEET.
.WEDNESDAY...NORTHEAST GALES TO 40 KNOTS. RAIN OR FREEZING
RAIN...POSSIBLY MIXED WITH SLEET. WAVES BUILDING TO 10 TO 14 FEET
OCCASIONALLY TO 18 FEET...THEN SUBSIDING TO 7 TO 10 FEET
OCCASIONALLY TO 13 FEET.
.WEDNESDAY NIGHT...NORTH GALES TO 35 KNOTS DIMINISHING TO 15 TO
25 KNOTS AFTER MIDNIGHT. A CHANCE OF SLEET. FREEZING RAIN LIKELY.
WAVES SUBSIDING TO 5 TO 8 FEET OCCASIONALLY TO 10 FEET.
.THURSDAY...NORTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS BY MID AFTERNOON. FREEZING RAIN LIKELY THROUGH EARLY
AFTERNOON...THEN RAIN LIKELY. WAVES SUBSIDING TO 3 TO 6 FEET
OCCASIONALLY TO 8 FEET.
.THURSDAY NIGHT...NORTHWEST WINDS 10 TO 20 KNOTS BACKING WEST
AFTER MIDNIGHT. A CHANCE OF RAIN THROUGH MIDNIGHT. A CHANCE OF
SNOW. WAVES 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
.FRIDAY...WEST WINDS 10 TO 20 KNOTS BECOMING NORTH 5 TO 15 KNOTS.
WAVES SUBSIDING TO CALM TO 2 FEET.
.SATURDAY...NORTH WINDS 5 TO 15 KNOTS BECOMING NORTHEAST 10 TO
20 KNOTS. A CHANCE OF RAIN AND SNOW. WAVES BUILDING TO 3 TO
5 FEET OCCASIONALLY TO 7 FEET.

$$

LSZ264-251015-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
1011 PM EDT MON APR 24 2017

...GALE WATCH IN EFFECT FROM TUESDAY EVENING THROUGH LATE
WEDNESDAY NIGHT...

.REST OF TONIGHT...EAST WINDS 20 TO 30 KNOTS BECOMING SOUTHEAST
15 TO 25 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF RAIN AFTER
MIDNIGHT. WAVES 8 TO 11 FEET OCCASIONALLY TO 14 FEET SUBSIDING TO
3 TO 6 FEET OCCASIONALLY TO 8 FEET.
.TUESDAY...SOUTHEAST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS IN THE AFTERNOON...THEN BECOMING NORTHEAST 15 TO
25 KNOTS LATE. A SLIGHT CHANCE OF RAIN. WAVES SUBSIDING TO 2 TO
4 FEET.
.TUESDAY NIGHT...NORTHEAST GALES TO 35 KNOTS INCREASING TO GALES
TO 40 KNOTS AFTER MIDNIGHT. RAIN. A CHANCE OF FREEZING RAIN AFTER
MIDNIGHT. WAVES BUILDING TO 7 TO 10 FEET OCCASIONALLY TO 13 FEET.
.WEDNESDAY...NORTHEAST GALES TO 40 KNOTS. FREEZING RAIN OR RAIN.
A CHANCE OF SLEET BY MID AFTERNOON. WAVES BUILDING TO 10 TO 14
FEET OCCASIONALLY TO 18 FEET...THEN SUBSIDING TO 9 TO 12 FEET
OCCASIONALLY TO 15 FEET.
.WEDNESDAY NIGHT...NORTHEAST GALES TO 35 KNOTS DIMINISHING TO
20 TO 30 KNOTS AFTER MIDNIGHT. FREEZING RAIN OR RAIN. WAVES
SUBSIDING TO 5 TO 8 FEET OCCASIONALLY TO 10 FEET.
.THURSDAY...NORTHEAST WINDS 15 TO 25 KNOTS BACKING NORTH BY MID
AFTERNOON. FREEZING RAIN LIKELY THROUGH EARLY AFTERNOON. RAIN
LIKELY. WAVES SUBSIDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.
.THURSDAY NIGHT...NORTHWEST WINDS 15 TO 25 KNOTS BACKING WEST
AFTER MIDNIGHT. A CHANCE OF RAIN THROUGH MIDNIGHT. A CHANCE OF
SNOW. WAVES BUILDING TO 4 TO 7 FEET OCCASIONALLY TO 9 FEET...THEN
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 1 TO 3 FEET.
.SATURDAY...NORTH WINDS 5 TO 15 KNOTS BECOMING NORTHEAST 10 TO
20 KNOTS. WAVES BUILDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.

$$

LSZ265-251015-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
1011 PM EDT MON APR 24 2017

.REST OF TONIGHT...SOUTHEAST WINDS 15 TO 25 KNOTS. WAVES 5 TO
8 FEET OCCASIONALLY TO 10 FEET SUBSIDING TO 2 TO 4 FEET.
.TUESDAY...SOUTHEAST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS IN THE AFTERNOON...THEN INCREASING TO 15 TO 25 KNOTS
LATE. A SLIGHT CHANCE OF RAIN THROUGH MID MORNING. A SLIGHT CHANCE
OF RAIN LATE IN THE AFTERNOON. WAVES BUILDING TO 3 TO 5 FEET
OCCASIONALLY TO 7 FEET...THEN SUBSIDING TO 2 TO 4 FEET.
.TUESDAY NIGHT...SOUTHEAST WINDS 10 TO 20 KNOTS BACKING EAST
AFTER MIDNIGHT...THEN INCREASING TO 15 TO 25 KNOTS LATE. RAIN.
WAVES SUBSIDING TO 1 TO 3 FEET...THEN BUILDING TO 3 TO 6 FEET
OCCASIONALLY TO 8 FEET.
.WEDNESDAY...NORTHEAST WINDS 20 TO 30 KNOTS BACKING NORTH BY MID
AFTERNOON. RAIN. WAVES BUILDING TO 7 TO 11 FEET OCCASIONALLY TO
14 FEET.
.WEDNESDAY NIGHT...NORTH WINDS 20 TO 30 KNOTS DIMINISHING TO
15 TO 25 KNOTS AFTER MIDNIGHT. RAIN LIKELY. WAVES SUBSIDING TO
4 TO 7 FEET OCCASIONALLY TO 9 FEET.
.THURSDAY...NORTH WINDS 15 TO 25 KNOTS BACKING NORTHWEST BY MID
AFTERNOON. RAIN LIKELY THROUGH EARLY AFTERNOON...THEN A CHANCE OF
RAIN. WAVES SUBSIDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.
.THURSDAY NIGHT...WEST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO 2 TO 4 FEET.
.FRIDAY...WEST WINDS 10 TO 20 KNOTS VEERING NORTH. WAVES
SUBSIDING TO CALM TO 2 FEET...THEN BUILDING TO 1 TO 3 FEET.
.SATURDAY...NORTH WINDS 10 TO 20 KNOTS VEERING NORTHEAST. WAVES
BUILDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.

$$

LSZ266-251015-
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-
1011 PM EDT MON APR 24 2017

.REST OF TONIGHT...SOUTHEAST WINDS 20 TO 30 KNOTS DIMINISHING TO
15 TO 25 KNOTS AFTER MIDNIGHT. WAVES 7 TO 10 FEET OCCASIONALLY TO
13 FEET SUBSIDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.
.TUESDAY...SOUTHEAST WINDS 15 TO 25 KNOTS. A SLIGHT CHANCE OF
RAIN BY LATE AFTERNOON. WAVES 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
.TUESDAY NIGHT...SOUTHEAST WINDS 15 TO 25 KNOTS INCREASING TO
20 TO 30 KNOTS AFTER MIDNIGHT...THEN BECOMING EAST GALES TO
35 KNOTS LATE. RAIN. WAVES SUBSIDING TO 2 TO 4 FEET...THEN
BUILDING TO 6 TO 9 FEET OCCASIONALLY TO 11 FEET.
.WEDNESDAY...EAST WINDS 20 TO 30 KNOTS BACKING NORTHEAST BY MID
AFTERNOON. GALE FORCE GUSTS TO 35 KNOTS NORTHERN PORTIONS. RAIN.
WAVES BUILDING TO 8 TO 12 FEET OCCASIONALLY TO 15 FEET.
.WEDNESDAY NIGHT...NORTHEAST WINDS 20 TO 30 KNOTS. GALE FORCE
GUSTS TO 35 KNOTS NORTHERN PORTIONS IN THE EVENING. RAIN LIKELY.
WAVES SUBSIDING TO 4 TO 7 FEET OCCASIONALLY TO 9 FEET.
.THURSDAY...NORTHEAST WINDS 15 TO 25 KNOTS BACKING WEST BY MID
AFTERNOON. RAIN LIKELY THROUGH EARLY AFTERNOON...THEN A CHANCE OF
RAIN. WAVES SUBSIDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.
.THURSDAY NIGHT...WEST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS AFTER MIDNIGHT. WAVES BUILDING TO 4 TO 7 FEET
OCCASIONALLY TO 9 FEET...THEN SUBSIDING TO 3 TO 6 FEET
OCCASIONALLY TO 8 FEET.
.FRIDAY...WEST WINDS 10 TO 20 KNOTS VEERING NORTH. WAVES
SUBSIDING TO CALM TO 2 FEET...THEN BUILDING TO 1 TO 3 FEET.
.SATURDAY...NORTH WINDS 15 TO 25 KNOTS VEERING NORTHEAST. A
CHANCE OF RAIN. WAVES BUILDING TO 3 TO 5 FEET OCCASIONALLY TO 7
FEET.

$$

LSZ267-251015-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
1011 PM EDT MON APR 24 2017

.REST OF TONIGHT...SOUTHEAST WINDS 20 TO 30 KNOTS. WAVES 4 TO
7 FEET OCCASIONALLY TO 9 FEET SUBSIDING TO 3 TO 6 FEET
OCCASIONALLY TO 8 FEET.
.TUESDAY...SOUTHEAST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS IN THE AFTERNOON. WAVES 3 TO 5 FEET OCCASIONALLY TO 7
FEET.
.TUESDAY NIGHT...SOUTHEAST WINDS 15 TO 25 KNOTS BACKING EAST
LATE. A CHANCE OF RAIN THROUGH MIDNIGHT...THEN RAIN LIKELY. WAVES
SUBSIDING TO CALM TO 2 FEET...THEN BUILDING TO 1 TO 3 FEET.
.WEDNESDAY...EAST WINDS 20 TO 30 KNOTS BECOMING SOUTHEAST 15 TO
25 KNOTS BY MID AFTERNOON. RAIN. ISOLATED THUNDERSTORMS BY MID
AFTERNOON. WAVES BUILDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET...
THEN SUBSIDING TO 2 TO 4 FEET.
.WEDNESDAY NIGHT...SOUTHEAST WINDS 10 TO 20 KNOTS BACKING EAST
AFTER MIDNIGHT. RAIN LIKELY. WAVES 2 TO 4 FEET.
.THURSDAY...EAST WINDS 15 TO 25 KNOTS VEERING SOUTH BY MID
AFTERNOON. A CHANCE OF RAIN THROUGH EARLY AFTERNOON...THEN RAIN
LIKELY. WAVES SUBSIDING TO 1 TO 3 FEET...THEN BUILDING TO 2 TO 4
FEET.
.THURSDAY NIGHT...WEST WINDS 15 TO 25 KNOTS. WAVES BUILDING TO
3 TO 5 FEET OCCASIONALLY TO 7 FEET.
.FRIDAY...WEST WINDS 15 TO 25 KNOTS VEERING NORTH. A CHANCE OF
RAIN AND SNOW. WAVES SUBSIDING TO 1 TO 3 FEET.
.SATURDAY...NORTH WINDS 15 TO 25 KNOTS VEERING NORTHEAST. WAVES
BUILDING TO 2 TO 4 FEET.

$$
LSZ261-251015-
MAFOR 2503/
SUPERIOR WEST 11230 12330 11310 11200 11110 11140 11146 19156.
CHANCE OF RAIN LATE TONIGHT AND TUESDAY. WAVES 4 TO 7 FEET
OVERNIGHT. WAVES SUBSIDING TO 2 TO 4 FEET TUESDAY. WAVES BUILDING
TO 4 TO 7 FEET TUESDAY EVENING.

SUPERIOR NORTH CENTRAL 11340 14330 11320 11220 11146. WAVES 6 TO
10 FEET SUBSIDING TO 4 TO 7 FEET OVERNIGHT. WAVES SUBSIDING TO 3
TO 6 FEET TUESDAY AND TUESDAY EVENING.

SUPERIOR SOUTH CENTRAL 14330 11330 12320 11326. WAVES 3 TO 6
FEET.

SUPERIOR EAST 14340 14330. CHANCE OF RAIN TUESDAY EVENING. WAVES
5 TO 8 FEET OVERNIGHT SUBSIDING TO 3 TO 6 FEET TUESDAY AND
TUESDAY 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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