Great Lakes Forecast
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500
FZUS63 KMQT 180202
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
1002 PM EDT MON APR 17 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 30.4 INCH RIDGE FROM NORTHERN QUEBEC TO THE UPPER
GREAT LAKES WILL MOVE OVER THE EASTERN GREAT LAKES TUESDAY
MORNING AS A 29.5 INCH LOW TRACKS EASTWARD TO MINNESOTA. THE LOW
WILL CROSS LAKE SUPERIOR AT 29.7 INCHES TUESDAY NIGHT WHILE A 30.4
INCH HIGH PRESSURE MOVES INTO NORTHERN ONTARIO. THE HIGH WILL
MOVE OVER QUEBEC ON THURSDAY AS A 29.7 INCH LOW PRESSURE MOVES
FROM THE CENTRAL PLAINS TO LOWER MICHIGAN. THE LOW WILL MOVE OFF
THE EAST COAST FRIDAY AFTERNOON AS A 30.4 INCH RIDGE MOVES OVER
THE NORTHERN GREAT LAKES. THE RIDGE WILL LINGER OVER THE NORTHERN
GREAT LAKES THROUGH SATURDAY.

LSZ162-181015-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
1002 PM EDT MON APR 17 2017 /902 PM CDT MON APR 17 2017/

.REST OF TONIGHT...EAST WINDS 10 TO 20 KNOTS. SCATTERED RAIN
SHOWERS...POSSIBLY MIXED WITH SLEET AFTER MIDNIGHT. WAVES CALM TO
2 FEET BUILDING TO 2 TO 4 FEET.
.TUESDAY...EAST WINDS 15 TO 25 KNOTS BECOMING SOUTHEAST 20 TO
30 KNOTS IN THE AFTERNOON...THEN BECOMING WEST 15 TO 25 KNOTS
LATE. RAIN SHOWERS...POSSIBLY MIXED WITH SLEET THROUGH NOON...THEN
NUMEROUS RAIN SHOWERS AND ISOLATED THUNDERSTORMS. WAVES BUILDING
TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.
.TUESDAY NIGHT...WEST WINDS 15 TO 25 KNOTS BECOMING NORTHWEST
10 TO 20 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF RAIN SHOWERS
THROUGH MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET.
.WEDNESDAY...NORTHEAST WINDS 10 TO 20 KNOTS VEERING EAST BY MID
AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.WEDNESDAY NIGHT...NORTHEAST WINDS 15 TO 25 KNOTS. A SLIGHT
CHANCE OF RAIN. A SLIGHT CHANCE OF SNOW AFTER MIDNIGHT. WAVES
BUILDING TO 1 TO 3 FEET.
.THURSDAY...NORTHEAST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS BY MID AFTERNOON. WAVES 1 TO 3 FEET.
.THURSDAY NIGHT...NORTHEAST WINDS 5 TO 15 KNOTS. WAVES SUBSIDING
TO CALM TO 2 FEET.
.FRIDAY...EAST WINDS 5 TO 15 KNOTS VEERING SOUTHWEST. WAVES CALM
TO 2 FEET.
.SATURDAY...SOUTHWEST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.

$$

LSZ263-181015-
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-
1002 PM EDT MON APR 17 2017

.REST OF TONIGHT...EAST WINDS 5 TO 15 KNOTS BECOMING SOUTHEAST
10 TO 20 KNOTS LATE. ISOLATED RAIN SHOWERS AFTER MIDNIGHT. WAVES
CALM TO 2 FEET BUILDING TO 1 TO 3 FEET.
.TUESDAY...SOUTHEAST WINDS 10 TO 20 KNOTS INCREASING TO 20 TO
30 KNOTS IN THE AFTERNOON...THEN VEERING SOUTH LATE. RAIN
SHOWERS...POSSIBLY MIXED WITH SLEET THROUGH NOON...THEN NUMEROUS
RAIN SHOWERS. WAVES BUILDING TO 5 TO 8 FEET OCCASIONALLY TO 10
FEET.
.TUESDAY NIGHT...WEST WINDS 10 TO 20 KNOTS VEERING NORTHWEST
AFTER MIDNIGHT. A SLIGHT CHANCE OF RAIN SHOWERS THROUGH MIDNIGHT.
WAVES SUBSIDING TO 2 TO 4 FEET.
.WEDNESDAY...NORTH WINDS 10 TO 20 KNOTS VEERING NORTHEAST BY MID
AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.WEDNESDAY NIGHT...NORTHEAST WINDS 10 TO 20 KNOTS. A SLIGHT
CHANCE OF RAIN AFTER MIDNIGHT. WAVES BUILDING TO 2 TO 4 FEET.
.THURSDAY...NORTHEAST WINDS 10 TO 20 KNOTS. WAVES 2 TO 4 FEET.
.THURSDAY NIGHT...NORTHEAST WINDS 5 TO 15 KNOTS. WAVES SUBSIDING
TO CALM TO 2 FEET...THEN BUILDING TO 1 TO 3 FEET.
.FRIDAY...NORTHEAST WINDS 5 TO 15 KNOTS BECOMING SOUTHWEST LESS
THAN 10 KNOTS. WAVES SUBSIDING TO CALM TO 2 FEET.
.SATURDAY...SOUTHWEST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.

$$

LSZ264-181015-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
1002 PM EDT MON APR 17 2017

...GALE WARNING IN EFFECT FROM TUESDAY AFTERNOON THROUGH TUESDAY
EVENING...

.REST OF TONIGHT...SOUTHEAST WINDS 5 TO 15 KNOTS INCREASING TO
10 TO 20 KNOTS LATE. WAVES CALM TO 2 FEET BUILDING TO 2 TO
4 FEET.
.TUESDAY...SOUTHEAST WINDS 15 TO 25 KNOTS INCREASING TO GALES TO
40 KNOTS IN THE AFTERNOON. SCATTERED RAIN SHOWERS...POSSIBLY
MIXED WITH SLEET AND SNOW THROUGH EARLY NOON...THEN NUMEROUS RAIN
SHOWERS. WAVES BUILDING TO 8 TO 11 FEET OCCASIONALLY TO 14 FEET.
.TUESDAY NIGHT...SOUTH WINDS 15 TO 25 KNOTS BECOMING NORTHWEST
10 TO 20 KNOTS AFTER MIDNIGHT...THEN INCREASING TO 15 TO 25 KNOTS
LATE. GALE FORCE GUSTS TO 35 KNOTS EARLY IN THE EVENING. A CHANCE
OF RAIN SHOWERS THROUGH MIDNIGHT. WAVES SUBSIDING TO 3 TO 5 FEET
OCCASIONALLY TO 7 FEET.
.WEDNESDAY...NORTH WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.WEDNESDAY NIGHT...NORTHEAST WINDS 10 TO 20 KNOTS VEERING EAST
AFTER MIDNIGHT. WAVES BUILDING TO 2 TO 4 FEET.
.THURSDAY...NORTHEAST WINDS 10 TO 20 KNOTS. WAVES 2 TO 4 FEET.
.THURSDAY NIGHT...NORTHEAST WINDS 5 TO 15 KNOTS. WAVES SUBSIDING
TO 1 TO 3 FEET.
.FRIDAY...NORTHEAST WINDS 5 TO 15 KNOTS BECOMING WEST LESS THAN
10 KNOTS. WAVES SUBSIDING TO CALM TO 2 FEET.
.SATURDAY...SOUTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTH. WAVES
BUILDING TO 1 TO 3 FEET.

$$

LSZ265-181015-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
1002 PM EDT MON APR 17 2017

...GALE WARNING IN EFFECT FROM TUESDAY AFTERNOON THROUGH TUESDAY
EVENING...

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

$$

LSZ266-181015-
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-
1002 PM EDT MON APR 17 2017

...GALE WARNING IN EFFECT FROM TUESDAY AFTERNOON THROUGH TUESDAY
EVENING...

.REST OF TONIGHT...EAST WINDS 5 TO 15 KNOTS VEERING SOUTHEAST
AFTER MIDNIGHT...THEN INCREASING TO 10 TO 20 KNOTS LATE. WAVES
CALM TO 2 FEET BUILDING TO 1 TO 3 FEET.
.TUESDAY...SOUTHEAST WINDS 10 TO 20 KNOTS INCREASING TO GALES TO
40 KNOTS IN THE AFTERNOON. SCATTERED RAIN SHOWERS BY NOON...THEN
NUMEROUS RAIN SHOWERS BY MID AFTERNOON. WAVES BUILDING TO 8 TO 11
FEET OCCASIONALLY TO 14 FEET.
.TUESDAY NIGHT...SOUTH GALES TO 35 KNOTS BECOMING WEST 15 TO
25 KNOTS AFTER MIDNIGHT...THEN BECOMING NORTHWEST 20 TO 30 KNOTS
LATE. A CHANCE OF RAIN SHOWERS. WAVES SUBSIDING TO 3 TO 5 FEET
OCCASIONALLY TO 7 FEET.
.WEDNESDAY...NORTH WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO 1 TO 3 FEET.
.WEDNESDAY NIGHT...NORTHEAST WINDS 10 TO 20 KNOTS BECOMING EAST
15 TO 25 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN...POSSIBLY MIXED
WITH SNOW AFTER MIDNIGHT. WAVES BUILDING TO 3 TO 5 FEET
OCCASIONALLY TO 7 FEET.
.THURSDAY...NORTHEAST WINDS 15 TO 25 KNOTS. WAVES 3 TO 6 FEET
OCCASIONALLY TO 8 FEET.
.THURSDAY NIGHT...NORTHEAST WINDS 15 TO 25 KNOTS DIMINISHING TO
10 TO 20 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO 2 TO 4 FEET.
.FRIDAY...NORTH WINDS 10 TO 20 KNOTS BECOMING NORTHWEST 5 TO
15 KNOTS. WAVES SUBSIDING TO CALM TO 2 FEET.
.SATURDAY...SOUTH WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS. WAVES CALM TO 2 FEET.

$$

LSZ267-181015-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
1002 PM EDT MON APR 17 2017

...GALE WARNING IN EFFECT FROM TUESDAY AFTERNOON THROUGH TUESDAY
EVENING...

.REST OF TONIGHT...NORTHEAST WINDS 5 TO 15 KNOTS BECOMING EAST
10 TO 20 KNOTS AFTER MIDNIGHT...THEN VEERING SOUTHEAST LATE.
WAVES CALM TO 2 FEET.
.TUESDAY...SOUTHEAST WINDS 15 TO 25 KNOTS INCREASING TO GALES TO
35 KNOTS BY MID AFTERNOON. ISOLATED RAIN SHOWERS BY NOON...THEN
NUMEROUS RAIN SHOWERS BY LATE AFTERNOON. WAVES BUILDING TO 6 TO 9
FEET OCCASIONALLY TO 11 FEET.
.TUESDAY NIGHT...SOUTHEAST GALES TO 35 KNOTS BECOMING SOUTH 20 TO
30 KNOTS AFTER MIDNIGHT...THEN BECOMING WEST 15 TO 25 KNOTS LATE.
RAIN SHOWERS LIKELY THROUGH MIDNIGHT...THEN A SLIGHT CHANCE OF
RAIN SHOWERS. WAVES SUBSIDING TO 2 TO 4 FEET.
.WEDNESDAY...NORTHWEST WINDS 15 TO 25 KNOTS BECOMING NORTH 10 TO
20 KNOTS BY MID AFTERNOON. WAVES BUILDING TO 3 TO 5 FEET
OCCASIONALLY TO 7 FEET...THEN SUBSIDING TO 1 TO 3 FEET.
.WEDNESDAY NIGHT...NORTHEAST WINDS 10 TO 20 KNOTS BECOMING EAST
15 TO 25 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF RAIN AND SNOW
AFTER MIDNIGHT. WAVES BUILDING TO 2 TO 4 FEET.
.THURSDAY...NORTHEAST WINDS 15 TO 25 KNOTS. A CHANCE OF RAIN AND
SNOW. WAVES BUILDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
.THURSDAY NIGHT...NORTHEAST WINDS 15 TO 25 KNOTS. WAVES SUBSIDING
TO 2 TO 4 FEET.
.FRIDAY...NORTH WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS. WAVES SUBSIDING TO CALM TO 2 FEET.
.SATURDAY...WEST WINDS 10 TO 20 KNOTS BACKING SOUTH. WAVES CALM
TO 2 FEET.

$$
LSZ261-181015-
MAFOR 1803/
SUPERIOR WEST 11210 12220 11226 11346 11446 11520 11620.
SCATTERED RAIN SHOWERS TUESDAY MORNING. SCATTERED RAIN SHOWERS
TUESDAY EVENING. WAVES 1 TO 3 FEET OVERNIGHT. WAVES 2 TO 6 FEET
TUESDAY AND TUESDAY EVENING.

SUPERIOR NORTH CENTRAL...GALE WARNING IN EFFECT...11310 12320
11330 11346 12356 11430. SCATTERED RAIN SHOWERS LATE TUESDAY
MORNING. CHANCE OF RAIN SHOWERS LATE TUESDAY EVENING. WAVES 1 TO
3 FEET OVERNIGHT BUILDING TO 6 TO 11 FEET TUESDAY AND TUESDAY
EVENING.

SUPERIOR SOUTH CENTRAL...GALE WARNING IN EFFECT...11310 12320
12330 11356 11450 11440. SCATTERED RAIN SHOWERS TUESDAY AFTERNOON
AND EVENING. WAVES 1 TO 3 FEET OVERNIGHT BUILDING TO 6 TO 9 FEET
TUESDAY. WAVES 4 TO 9 FEET TUESDAY EVENING.

SUPERIOR EAST...GALE WARNING IN EFFECT...11200 12310 11320 11340
11346 12356. SCATTERED RAIN SHOWERS EARLY TUESDAY AFTERNOON.
WAVES AROUND 1 FOOT OVERNIGHT BUILDING TO 5 TO 9 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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