Great Lakes Forecast
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000
FZUS63 KMQT 242102 AAA
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR...UPDATED
NATIONAL WEATHER SERVICE MARQUETTE MI
502 PM EDT MON APR 24 2017

FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE SUPERIOR

UPDATED TO REPRESENT AN EARLIER START TIME FOR THE GALE WATCH
TUESDAY EVENING ON THE WEST HALF OF 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
THIS EVENING. 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.

LSZ162-250515-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
502 PM EDT MON APR 24 2017 /402 PM CDT MON APR 24 2017/

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

.LATE THIS AFTERNOON...NORTHEAST WINDS 20 TO 30 KNOTS. A FEW GALE
FORCE GUSTS TO 35 KNOTS NEAR THE MINNESOTA SHORE AND NEAR DULUTH.
ISOLATED RAIN SHOWERS. WAVES 6 TO 9 FEET OCCASIONALLY TO 11 FEET
BUILDING TO 7 TO 10 FEET OCCASIONALLY TO 13 FEET.
.TONIGHT...NORTHEAST WINDS 20 TO 30 KNOTS BECOMING EAST 10 TO
20 KNOTS AFTER MIDNIGHT...THEN BECOMING SOUTHEAST 5 TO 15 KNOTS
LATE. A CHANCE OF RAIN. WAVES SUBSIDING TO 3 TO 5 FEET
OCCASIONALLY TO 7 FEET.
.TUESDAY...SOUTHEAST WINDS 5 TO 15 KNOTS BACKING NORTHEAST IN THE
AFTERNOON...THEN INCREASING TO 15 TO 25 KNOTS LATE. A CHANCE OF
RAIN. WAVES SUBSIDING TO 1 TO 3 FEET.
.TUESDAY NIGHT...NORTHEAST GALES TO 40 KNOTS. RAIN. A SLIGHT
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. 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 RAIN OR 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.

$$

LSZ263-250515-
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-
502 PM EDT MON APR 24 2017

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

.LATE THIS AFTERNOON...EAST WINDS 20 TO 30 KNOTS. ISOLATED RAIN
SHOWERS. WAVES 5 TO 8 FEET OCCASIONALLY TO 10 FEET BUILDING TO
7 TO 10 FEET OCCASIONALLY TO 13 FEET.
.TONIGHT...SOUTHEAST WINDS 20 TO 30 KNOTS DIMINISHING TO 10 TO 20
KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN. WAVES BUILDING TO 8 TO 11
FEET OCCASIONALLY TO 14 FEET...THEN SUBSIDING TO 3 TO 6 FEET
OCCASIONALLY TO 8 FEET.
.TUESDAY...SOUTHEAST WINDS 5 TO 15 KNOTS BECOMING NORTHEAST 15 TO
25 KNOTS LATE. A CHANCE OF RAIN. WAVES SUBSIDING TO 2 TO 4 FEET.
.TUESDAY NIGHT...NORTHEAST GALES TO 40 KNOTS. RAIN THROUGH
MIDNIGHT...THEN FREEZING 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. 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 AND RAIN OR FREEZING
RAIN. 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. RAIN OR 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 SUBSIDING TO 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.

$$

LSZ264-250515-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
502 PM EDT MON APR 24 2017

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

.LATE THIS AFTERNOON...EAST WINDS 20 TO 30 KNOTS WITH A FEW GALE
FORCE GUSTS TO 35 KNOTS. WAVES 6 TO 9 FEET OCCASIONALLY TO 11
FEET BUILDING TO 7 TO 10 FEET OCCASIONALLY TO 13 FEET.
.TONIGHT...SOUTHEAST WINDS 20 TO 30 KNOTS DIMINISHING TO 10 TO 20
KNOTS AFTER MIDNIGHT. A FEW GALE FORCE GUSTS TO 35 KNOTS THROUGH
MID EVENING. A CHANCE OF RAIN. WAVES BUILDING TO 8 TO 11 FEET
OCCASIONALLY TO 14 FEET...THEN SUBSIDING TO 3 TO 6 FEET
OCCASIONALLY TO 8 FEET.
.TUESDAY...SOUTHEAST WINDS 10 TO 20 KNOTS BECOMING EAST 15 TO
25 KNOTS LATE. A CHANCE OF RAIN. WAVES SUBSIDING TO 2 TO 4 FEET.
.TUESDAY NIGHT...NORTHEAST GALES TO 35 KNOTS. RAIN. A SLIGHT
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 CALM TO 2 FEET...THEN BUILDING TO 1 TO 3 FEET.
.SATURDAY...NORTH WINDS 5 TO 15 KNOTS BECOMING NORTHEAST 10 TO
20 KNOTS. WAVES SUBSIDING TO CALM TO 2 FEET...THEN BUILDING TO
3 TO 5 FEET OCCASIONALLY TO 7 FEET.

$$

LSZ265-250515-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
502 PM EDT MON APR 24 2017

.LATE THIS AFTERNOON...EAST WINDS 15 TO 25 KNOTS. WAVES 5 TO
8 FEET OCCASIONALLY TO 10 FEET.
.TONIGHT...SOUTHEAST WINDS 15 TO 25 KNOTS. A SLIGHT CHANCE OF
RAIN AFTER MIDNIGHT. WAVES SUBSIDING TO 3 TO 6 FEET OCCASIONALLY
TO 8 FEET.
.TUESDAY...SOUTHEAST WINDS 10 TO 20 KNOTS. A SLIGHT CHANCE OF
RAIN. WAVES 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
SUBSIDING TO CALM TO 2 FEET...THEN BUILDING TO 3 TO 5 FEET
OCCASIONALLY TO 7 FEET.

$$

LSZ266-250515-
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-
502 PM EDT MON APR 24 2017

.LATE THIS AFTERNOON...EAST WINDS 20 TO 30 KNOTS. WAVES 5 TO
8 FEET OCCASIONALLY TO 10 FEET BUILDING TO 7 TO 10 FEET
OCCASIONALLY TO 13 FEET.
.TONIGHT...SOUTHEAST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF RAIN AFTER MIDNIGHT.
WAVES SUBSIDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.
.TUESDAY...SOUTHEAST WINDS 15 TO 25 KNOTS. A SLIGHT CHANCE OF
RAIN. WAVES SUBSIDING TO 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 GALES TO 40 KNOTS BACKING NORTHEAST BY MID
AFTERNOON. RAIN. WAVES BUILDING TO 8 TO 12 FEET OCCASIONALLY TO
15 FEET.
.WEDNESDAY NIGHT...NORTHEAST GALES TO 35 KNOTS DIMINISHING TO
20 TO 30 KNOTS AFTER MIDNIGHT. 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 SUBSIDING TO CALM TO 2 FEET...THEN BUILDING
TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.

$$

LSZ267-250515-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
502 PM EDT MON APR 24 2017

.LATE THIS AFTERNOON...SOUTHEAST WINDS 20 TO 30 KNOTS. WAVES 3 TO
6 FEET OCCASIONALLY TO 8 FEET BUILDING TO 4 TO 7 FEET
OCCASIONALLY TO 9 FEET.
.TONIGHT...SOUTHEAST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO 3 TO 6 FEET
OCCASIONALLY TO 8 FEET.
.TUESDAY...SOUTHEAST WINDS 15 TO 25 KNOTS. WAVES SUBSIDING TO
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 CALM TO 2 FEET...THEN BUILDING
TO 1 TO 3 FEET.
.SATURDAY...NORTH WINDS 15 TO 25 KNOTS VEERING NORTHEAST. WAVES
SUBSIDING TO CALM TO 2 FEET...THEN BUILDING TO 2 TO 4 FEET.

$$

LSZ261-250515-
MAFOR 2421/
SUPERIOR WEST 11140 11240 11230 11220 13310 11210. CHANCE OF RAIN
FROM LATE EVENING THROUGH MID MORNING TUESDAY. WAVES 6 TO 10 FEET
SUBSIDING TO 4 TO 7 FEET TONIGHT. WAVES SUBSIDING TO 1 TO 3 FEET
TUESDAY.

SUPERIOR NORTH CENTRAL 11250 11350 11340 13330 11320 11310.
CHANCE OF RAIN LATE TONIGHT AND TUESDAY MORNING. WAVES 6 TO 11
FEET TONIGHT SUBSIDING TO 3 TO 6 FEET TUESDAY.

SUPERIOR SOUTH CENTRAL 13330 11320 13330 11320. WAVES 3 TO 7 FEET.


SUPERIOR EAST 13340 14330 11330. WAVES 5 TO 8 FEET TONIGHT
SUBSIDING TO 3 TO 6 FEET TUESDAY.

$$

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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