Great Lakes Forecast
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000
FZUS63 KMQT 221402
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
1002 AM EDT SAT APR 22 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...AS HIGH PRESSURE OF 30.2 INCHES OVER THE UPPER GREAT
LAKES REACHES THE LOWER GREAT LAKES BY SUNDAY MORNING...A 30.0
INCH LOW PRESSURE TROUGH FROM JAMES BAY TO NORTH DAKOTA WILL SLIDE
ACROSS THE UPPER LAKES. EXPECT THIS TROUGH TO STALL OVER THE
CENTRAL GREAT LAKES SUNDAY ON THE SOUTHERN FLANK OF A 30.4 INCH
HIGH PRESSURE RIDGE THAT WILL BUILD OVER FAR NORTHERN ONTARIO BY
MONDAY MORNING. AS THIS RIDGE DRIFTS TO THE EAST AND THROUGH THE
CANADIAN MARITIMES...A 29.5 INCH LOW PRESSURE SYSTEM OVER THE
NORTHERN PLAINS ON MONDAY WILL MOVE ACROSS WESTERN LAKE SUPERIOR
ON TUESDAY AND INTO QUEBEC ON WEDNESDAY WHILE ANOTHER LOW PRESSURE
SYSTEM OF 29.4 INCHES MOVES FROM THE CENTRAL PLAINS TO THE
WESTERN GREAT LAKES.

LSZ162-222215-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
1002 AM EDT SAT APR 22 2017 /902 AM CDT SAT APR 22 2017/

.REST OF TODAY...SOUTHWEST WINDS 10 TO 20 KNOTS. WAVES CALM TO 2
FEET BUILDING TO 1 TO 3 FEET.
.TONIGHT...WEST WINDS 10 TO 20 KNOTS VEERING NORTHEAST AFTER
MIDNIGHT. SCATTERED RAIN SHOWERS. WAVES SUBSIDING TO CALM TO
2 FEET...THEN BUILDING TO 1 TO 3 FEET.
.SUNDAY...EAST WINDS 10 TO 20 KNOTS. A CHANCE OF RAIN SHOWERS...
POSSIBLY MIXED WITH SNOW. WAVES 1 TO 3 FEET.
.SUNDAY NIGHT...EAST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN AND SNOW SHOWERS. A
SLIGHT CHANCE OF FREEZING RAIN AFTER MIDNIGHT. WAVES BUILDING TO
3 TO 6 FEET OCCASIONALLY TO 8 FEET.
.MONDAY...EAST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO 30 KNOTS
BY MID AFTERNOON. A CHANCE OF SNOW SHOWERS THROUGH EARLY
AFTERNOON. A CHANCE OF RAIN SHOWERS. WAVES BUILDING TO 5 TO
8 FEET OCCASIONALLY TO 10 FEET.
.MONDAY NIGHT...EAST WINDS 15 TO 25 KNOTS BECOMING SOUTH 10 TO
20 KNOTS AFTER MIDNIGHT. RAIN SHOWERS LIKELY. WAVES SUBSIDING TO
2 TO 4 FEET.
.TUESDAY...WEST WINDS 10 TO 20 KNOTS BECOMING NORTHEAST 15 TO
25 KNOTS. A CHANCE OF RAIN SHOWERS. A CHANCE OF SNOW SHOWERS.
WAVES SUBSIDING TO CALM TO 2 FEET...THEN BUILDING TO 2 TO 4 FEET.
.WEDNESDAY...NORTHEAST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS. A CHANCE OF SNOW SHOWERS...POSSIBLY MIXED WITH RAIN.
WAVES 2 TO 4 FEET.

$$

LSZ263-222215-
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 AM EDT SAT APR 22 2017

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

$$

LSZ264-222215-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
1002 AM EDT SAT APR 22 2017

.REST OF TODAY...SOUTHWEST WINDS 10 TO 20 KNOTS INCREASING TO
15 TO 25 KNOTS THIS AFTERNOON. ISOLATED RAIN SHOWERS BY LATE
AFTERNOON. WAVES 1 TO 3 FEET.
.TONIGHT...NORTH WINDS 10 TO 20 KNOTS. SCATTERED RAIN SHOWERS
THROUGH MIDNIGHT...THEN NUMEROUS RAIN SHOWERS AFTER MIDNIGHT...
POSSIBLY MIXED WITH SNOW. WAVES 1 TO 3 FEET.
.SUNDAY...NORTHEAST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS BY MID AFTERNOON. A SLIGHT CHANCE OF RAIN AND SNOW
SHOWERS THROUGH EARLY AFTERNOON. WAVES SUBSIDING TO CALM TO
2 FEET.
.SUNDAY NIGHT...EAST WINDS 5 TO 15 KNOTS. A CHANCE OF SNOW
SHOWERS...POSSIBLY MIXED WITH RAIN. WAVES CALM TO 2 FEET.
.MONDAY...EAST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO 30 KNOTS
BY MID AFTERNOON. A CHANCE OF SNOW SHOWERS...POSSIBLY MIXED WITH
RAIN. 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 SHOWERS THROUGH
MIDNIGHT...THEN RAIN SHOWERS LIKELY AFTER MIDNIGHT. WAVES
BUILDING TO 5 TO 9 FEET OCCASIONALLY TO 11 FEET.
.TUESDAY...SOUTH WINDS 15 TO 25 KNOTS BACKING NORTH. RAIN SHOWERS
LIKELY...THEN A CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO 2 TO
4 FEET...THEN BUILDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.
.WEDNESDAY...NORTHEAST WINDS 15 TO 25 KNOTS. A CHANCE OF SNOW
SHOWERS...POSSIBLY MIXED WITH RAIN. WAVES BUILDING TO 4 TO 7 FEET
OCCASIONALLY TO 9 FEET...THEN SUBSIDING TO 2 TO 4 FEET.

$$

LSZ265-222215-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
1002 AM EDT SAT APR 22 2017

.REST OF TODAY...SOUTHWEST WINDS 5 TO 15 KNOTS INCREASING TO
10 TO 20 KNOTS BY MID AFTERNOON. WAVES CALM TO 2 FEET.
.TONIGHT...WEST WINDS 10 TO 20 KNOTS VEERING NORTH AFTER
MIDNIGHT. SCATTERED RAIN SHOWERS. WAVES BUILDING TO 1 TO 3 FEET.
.SUNDAY...NORTHEAST WINDS 10 TO 20 KNOTS. A CHANCE OF SNOW
SHOWERS...POSSIBLY MIXED WITH RAIN THROUGH EARLY AFTERNOON. WAVES
BUILDING TO 2 TO 4 FEET...THEN SUBSIDING TO CALM TO 2 FEET.
.SUNDAY NIGHT...NORTHEAST WINDS 5 TO 15 KNOTS BECOMING EAST 10 TO
20 KNOTS AFTER MIDNIGHT. A CHANCE OF SNOW SHOWERS. WAVES CALM TO
2 FEET.
.MONDAY...EAST WINDS 15 TO 25 KNOTS. A CHANCE OF RAIN AND SNOW
SHOWERS THROUGH EARLY AFTERNOON. WAVES BUILDING TO 4 TO 7 FEET
OCCASIONALLY TO 9 FEET.
.MONDAY NIGHT...SOUTHEAST WINDS 15 TO 25 KNOTS. A CHANCE OF RAIN
SHOWERS THROUGH MIDNIGHT...THEN RAIN SHOWERS LIKELY AFTER
MIDNIGHT. WAVES SUBSIDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.
.TUESDAY...SOUTH WINDS 15 TO 25 KNOTS BACKING NORTH. A CHANCE OF
RAIN SHOWERS. A CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO 1 TO
3 FEET...THEN BUILDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.
.WEDNESDAY...NORTH WINDS 20 TO 30 KNOTS BECOMING NORTHEAST 15 TO
25 KNOTS. A CHANCE OF SNOW SHOWERS...POSSIBLY MIXED WITH RAIN.
WAVES BUILDING TO 4 TO 7 FEET OCCASIONALLY TO 9 FEET...THEN
SUBSIDING TO 2 TO 4 FEET.

$$

LSZ266-222215-
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 AM EDT SAT APR 22 2017

.REST OF TODAY...SOUTHWEST WINDS 10 TO 20 KNOTS. WAVES CALM TO
2 FEET BUILDING TO 1 TO 3 FEET.
.TONIGHT...SOUTHWEST WINDS 5 TO 15 KNOTS BECOMING NORTH 10 TO
20 KNOTS AFTER MIDNIGHT. SCATTERED RAIN SHOWERS. SCATTERED SNOW
SHOWERS AFTER MIDNIGHT. WAVES BUILDING TO 2 TO 4 FEET.
.SUNDAY...NORTH WINDS 15 TO 25 KNOTS DIMINISHING TO 5 TO 15 KNOTS
BY MID AFTERNOON. A CHANCE OF SNOW SHOWERS...POSSIBLY MIXED WITH
RAIN THROUGH EARLY AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.SUNDAY NIGHT...NORTH WINDS 5 TO 15 KNOTS BECOMING EAST 10 TO
20 KNOTS AFTER MIDNIGHT. A CHANCE OF SNOW SHOWERS. A CHANCE OF
RAIN SHOWERS AFTER MIDNIGHT. WAVES BUILDING TO 1 TO 3 FEET.
.MONDAY...EAST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO 30 KNOTS
BY MID AFTERNOON. A CHANCE OF SNOW SHOWERS THROUGH EARLY
AFTERNOON. A CHANCE OF RAIN SHOWERS. 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 SHOWERS. WAVES
5 TO 8 FEET OCCASIONALLY TO 10 FEET.
.TUESDAY...SOUTH WINDS 15 TO 25 KNOTS BACKING NORTH. A CHANCE OF
RAIN SHOWERS. A CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO 2 TO
4 FEET...THEN BUILDING TO 4 TO 7 FEET OCCASIONALLY TO 9 FEET.
.WEDNESDAY...NORTHEAST WINDS 15 TO 25 KNOTS. A CHANCE OF SNOW
SHOWERS...POSSIBLY MIXED WITH RAIN. WAVES SUBSIDING TO 2 TO
4 FEET.

$$

LSZ267-222215-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
1002 AM EDT SAT APR 22 2017

.REST OF TODAY...SOUTHWEST WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
.TONIGHT...SOUTHWEST WINDS 10 TO 20 KNOTS VEERING NORTH AFTER
MIDNIGHT. SCATTERED RAIN SHOWERS. SCATTERED SNOW SHOWERS AFTER
MIDNIGHT. WAVES CALM TO 2 FEET.
.SUNDAY...NORTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS BY MID AFTERNOON. A CHANCE OF RAIN AND SNOW SHOWERS
THROUGH EARLY AFTERNOON. WAVES BUILDING TO 1 TO 3 FEET...THEN
SUBSIDING TO CALM TO 2 FEET.
.SUNDAY NIGHT...NORTH WINDS 10 TO 20 KNOTS VEERING EAST AFTER
MIDNIGHT. A CHANCE OF SNOW SHOWERS...POSSIBLY MIXED WITH RAIN
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.MONDAY...EAST WINDS 15 TO 25 KNOTS BECOMING SOUTHEAST 20 TO
30 KNOTS BY MID AFTERNOON. A CHANCE OF SNOW SHOWERS...POSSIBLY
MIXED WITH RAIN THROUGH EARLY AFTERNOON. WAVES BUILDING TO 3 TO
5 FEET OCCASIONALLY TO 7 FEET.
.MONDAY NIGHT...SOUTHEAST WINDS 20 TO 30 KNOTS. WAVES BUILDING TO
3 TO 6 FEET OCCASIONALLY TO 8 FEET.
.TUESDAY...SOUTH WINDS 20 TO 30 KNOTS BECOMING NORTH 10 TO
20 KNOTS. A CHANCE OF RAIN SHOWERS. A CHANCE OF SNOW SHOWERS.
WAVES SUBSIDING TO CALM TO 2 FEET...THEN BUILDING TO 3 TO 5 FEET
OCCASIONALLY TO 7 FEET.
.WEDNESDAY...NORTHEAST WINDS 15 TO 25 KNOTS. A CHANCE OF RAIN AND
SNOW SHOWERS. WAVES BUILDING TO 3 TO 6 FEET OCCASIONALLY TO
8 FEET...THEN SUBSIDING TO 2 TO 4 FEET.

$$
LSZ261-222215-
MAFOR 2215/
SUPERIOR WEST 13520 11610 12116 11126 11220. SCATTERED RAIN
SHOWERS LATE THIS EVENING THROUGH MID SUNDAY MORNING...THEN
CHANCE OF RAIN AND SNOW SHOWERS LATE SUNDAY MORNING. WAVES 1
TO 3 FEET.

SUPERIOR NORTH CENTRAL 11520 11530 11630 11720 11820 11826 11126
11120. SCATTERED RAIN SHOWERS LATE THIS EVENING. SCATTERED RAIN
AND SNOW SHOWERS LATE TONIGHT THROUGH MID SUNDAY MORNING. WAVES 2
TO 3 FEET.

SUPERIOR SOUTH CENTRAL 14510 11710 11810 12820. SCATTERED RAIN
SHOWERS LATE TONIGHT THROUGH MID SUNDAY MORNING...THEN CHANCE OF
SNOW SHOWERS LATE SUNDAY MORNING. WAVES 1 TO 4 FEET.


SUPERIOR EAST 14510 11610 11710 12820. SCATTERED RAIN SHOWERS
LATE TONIGHT. CHANCE OF RAIN SHOWERS AND SCATTERED SNOW SHOWERS
THROUGH MID MORNING...THEN CHANCE OF SNOW AND RAIN SHOWERS LATE
SUNDAY MORNING. WAVES 1 TO 3 FEET.

$$

JSS

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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