Great Lakes Forecast
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812
FZUS63 KMQT 271411
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
1011 AM EDT THU APR 27 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 29.4 INCH LOW PRESSURE OVER NORTHERN LAKE MICHIGAN
THIS MORNING WILL SLOWLY MOVE NORTHEAST AND DEEPEN TO 29.2 INCHES
AS IT MOVES NORTHEAST OF WAWA ONTARIO THIS EVENING. THIS LOW CWILL
LIFT NORTHWARD TO JAMES BAY BY FRIDAY MORNING. A RIDGE WILL BUILD
FROM 30.0 INCHES ON FRIDAY TO 30.4 INCHES OVER THE UPPER GREAT
LAKES ON SATURDAY. THIS RIDGE WILL REMAIN OVER WESTERN QUEBEC ON
SUNDAY AND WEAKEN TO 30.3 INCHES. 29.6 INCH LOW PRESSURE OVER
MISSOURI SUNDAY MORNING WILL DEEPEN TO 29.3 INCHES OVER SOUTHWEST
WISCONSIN MONDAY MORNING AND TO 29.1 INCHES OVER NORTHERN
WISCONSIN BY MONDAY EVENING.

LSZ162-272215-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
1011 AM EDT THU APR 27 2017 /911 AM CDT THU APR 27 2017/

.REST OF TODAY...NORTH WINDS 15 TO 25 KNOTS BACKING NORTHWEST BY
MID AFTERNOON. A SLIGHT CHANCE OF FREEZING RAIN BY LATE MORNING.
A CHANCE OF SNOW. WAVES 3 TO 5 FEET OCCASIONALLY TO 7 FEET
SUBSIDING TO 2 TO 4 FEET.
.TONIGHT...WEST WINDS 15 TO 25 KNOTS. A SLIGHT CHANCE OF SNOW.
WAVES 2 TO 4 FEET.
.FRIDAY...WEST WINDS 15 TO 25 KNOTS. A CHANCE OF SNOW SHOWERS. A
SLIGHT CHANCE OF RAIN SHOWERS BY MID AFTERNOON. WAVES SUBSIDING
TO 1 TO 3 FEET.
.FRIDAY NIGHT...NORTHWEST WINDS 10 TO 20 KNOTS. A SLIGHT CHANCE
OF RAIN AND SNOW SHOWERS. WAVES SUBSIDING TO CALM TO 2 FEET.
.SATURDAY...NORTH WINDS 5 TO 15 KNOTS VEERING SOUTH BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
.SATURDAY NIGHT...EAST WINDS 5 TO 15 KNOTS BECOMING NORTHEAST
10 TO 20 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.SUNDAY...NORTHEAST WINDS 15 TO 25 KNOTS INCREASING TO GALES TO
35 KNOTS. A CHANCE OF RAIN SHOWERS...THEN SNOW SHOWERS WITH RAIN
SHOWERS. WAVES BUILDING TO 6 TO 9 FEET OCCASIONALLY TO 11 FEET.
.MONDAY...NORTHEAST GALES TO 35 KNOTS BECOMING NORTH 15 TO
25 KNOTS. RAIN SHOWERS...POSSIBLY MIXED WITH SNOW SHOWERS...THEN
A CHANCE OF RAIN AND SNOW SHOWERS. WAVES BUILDING TO 8 TO 11 FEET
OCCASIONALLY TO 14 FEET...THEN SUBSIDING TO 3 TO 5 FEET
OCCASIONALLY TO 7 FEET.

$$

LSZ263-272215-
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 AM EDT THU APR 27 2017

.REST OF TODAY...NORTH WINDS 15 TO 25 KNOTS BACKING NORTHWEST BY
MID AFTERNOON. SNOW. WAVES 3 TO 6 FEET OCCASIONALLY TO 8 FEET.
.TONIGHT...WEST WINDS 15 TO 25 KNOTS. A CHANCE OF SNOW...POSSIBLY
MIXED WITH RAIN AND FREEZING RAIN. WAVES BUILDING TO 3 TO 6 FEET
OCCASIONALLY TO 8 FEET.
.FRIDAY...WEST WINDS 15 TO 25 KNOTS. A CHANCE OF SNOW SHOWERS. A
CHANCE OF RAIN SHOWERS BY MID AFTERNOON. WAVES SUBSIDING TO 3 TO
5 FEET OCCASIONALLY TO 7 FEET.
.FRIDAY NIGHT...NORTHWEST WINDS 10 TO 20 KNOTS DIMINISHING TO
5 TO 15 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF RAIN AND SNOW
SHOWERS. WAVES SUBSIDING TO CALM TO 2 FEET.
.SATURDAY...NORTH WINDS 5 TO 15 KNOTS BECOMING NORTHWEST LESS
THAN 10 KNOTS BY MID AFTERNOON. WAVES CALM TO 2 FEET.
.SATURDAY NIGHT...NORTHEAST WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
.SUNDAY...NORTHEAST WINDS 15 TO 25 KNOTS INCREASING TO GALES TO
35 KNOTS. A CHANCE OF RAIN SHOWERS. SNOW SHOWERS LIKELY. WAVES
BUILDING TO 6 TO 9 FEET OCCASIONALLY TO 11 FEET.
.MONDAY...NORTHEAST GALES TO 35 KNOTS BECOMING NORTH 15 TO
25 KNOTS. RAIN SHOWERS...POSSIBLY MIXED WITH SNOW SHOWERS...THEN
A CHANCE OF RAIN AND SNOW SHOWERS. WAVES BUILDING TO 8 TO 11 FEET
OCCASIONALLY TO 14 FEET...THEN SUBSIDING TO 3 TO 5 FEET
OCCASIONALLY TO 7 FEET.

$$

LSZ264-272215-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
1011 AM EDT THU APR 27 2017

.REST OF TODAY...NORTH WINDS 15 TO 25 KNOTS BECOMING NORTHWEST
20 TO 30 KNOTS BY MID AFTERNOON. SLEET BY LATE MORNING. SNOW...
POSSIBLY MIXED WITH RAIN AND FREEZING RAIN. WAVES 3 TO 6 FEET
OCCASIONALLY TO 8 FEET.
.TONIGHT...WEST WINDS 15 TO 25 KNOTS. A CHANCE OF SNOW. A SLIGHT
CHANCE OF FREEZING RAIN AFTER MIDNIGHT. WAVES 3 TO 6 FEET
OCCASIONALLY TO 8 FEET.
.FRIDAY...WEST WINDS 15 TO 25 KNOTS. A CHANCE OF SNOW SHOWERS. A
CHANCE OF RAIN SHOWERS BY MID AFTERNOON. WAVES SUBSIDING TO 3 TO
6 FEET OCCASIONALLY TO 8 FEET.
.FRIDAY NIGHT...NORTHWEST WINDS 10 TO 20 KNOTS. A CHANCE OF RAIN
SHOWERS...POSSIBLY MIXED WITH SNOW. WAVES SUBSIDING TO 2 TO
4 FEET.
.SATURDAY...NORTHWEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.SATURDAY NIGHT...NORTH WINDS 5 TO 15 KNOTS VEERING EAST AFTER
MIDNIGHT. WAVES CALM TO 2 FEET.
.SUNDAY...EAST WINDS 10 TO 20 KNOTS BECOMING NORTHEAST 20 TO
30 KNOTS. RAIN SHOWERS...POSSIBLY MIXED WITH SNOW SHOWERS. WAVES
BUILDING TO 5 TO 8 FEET OCCASIONALLY TO 10 FEET.
.MONDAY...NORTHEAST WINDS 20 TO 30 KNOTS BECOMING NORTH 15 TO
25 KNOTS. RAIN SHOWERS...POSSIBLY MIXED WITH SNOW SHOWERS. WAVES
BUILDING TO 8 TO 11 FEET OCCASIONALLY TO 14 FEET...THEN SUBSIDING
TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.

$$

LSZ265-272215-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
1011 AM EDT THU APR 27 2017

.REST OF TODAY...NORTHWEST WINDS 20 TO 30 KNOTS BACKING WEST BY
MID AFTERNOON. RAIN...POSSIBLY MIXED WITH SNOW AND FREEZING RAIN
LIKELY. WAVES 3 TO 5 FEET OCCASIONALLY TO 7 FEET BUILDING TO 4 TO
7 FEET OCCASIONALLY TO 9 FEET...THEN SUBSIDING TO 3 TO 6 FEET
OCCASIONALLY TO 8 FEET.
.TONIGHT...WEST WINDS 15 TO 25 KNOTS. A CHANCE OF SNOW...POSSIBLY
MIXED WITH RAIN. A SLIGHT CHANCE OF FREEZING RAIN AFTER MIDNIGHT.
WAVES SUBSIDING TO 2 TO 4 FEET.
.FRIDAY...WEST WINDS 15 TO 25 KNOTS. A SLIGHT CHANCE OF FREEZING
RAIN THROUGH EARLY AFTERNOON. A CHANCE OF SNOW SHOWERS. A SLIGHT
CHANCE OF RAIN SHOWERS BY MID AFTERNOON. WAVES 2 TO 4 FEET.
.FRIDAY NIGHT...WEST WINDS 15 TO 25 KNOTS VEERING NORTHWEST AFTER
MIDNIGHT. A SLIGHT CHANCE OF RAIN AND SNOW SHOWERS. WAVES
SUBSIDING TO 1 TO 3 FEET...THEN BUILDING TO 2 TO 4 FEET.
.SATURDAY...NORTHWEST WINDS 10 TO 20 KNOTS VEERING NORTH BY MID
AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.SATURDAY NIGHT...NORTH WINDS 10 TO 20 KNOTS VEERING EAST AFTER
MIDNIGHT. WAVES CALM TO 2 FEET.
.SUNDAY...EAST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO 30 KNOTS.
A CHANCE OF RAIN SHOWERS. SNOW SHOWERS LIKELY. WAVES BUILDING TO
5 TO 8 FEET OCCASIONALLY TO 10 FEET.
.MONDAY...NORTHEAST WINDS 20 TO 30 KNOTS BECOMING NORTH 15 TO
25 KNOTS. RAIN SHOWERS...POSSIBLY MIXED WITH SNOW SHOWERS...THEN
A CHANCE OF RAIN SHOWERS...POSSIBLY MIXED WITH SNOW. WAVES
BUILDING TO 7 TO 10 FEET OCCASIONALLY TO 13 FEET...THEN SUBSIDING
TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.

$$

LSZ266-272215-
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 AM EDT THU APR 27 2017

.REST OF TODAY...NORTH WINDS 15 TO 25 KNOTS BECOMING WEST 20 TO
30 KNOTS BY MID AFTERNOON. RAIN. A CHANCE OF SNOW BY MID
AFTERNOON. WAVES 3 TO 6 FEET OCCASIONALLY TO 8 FEET BUILDING TO
4 TO 7 FEET OCCASIONALLY TO 9 FEET...THEN SUBSIDING TO 3 TO
6 FEET OCCASIONALLY TO 8 FEET.
.TONIGHT...WEST WINDS 20 TO 30 KNOTS BECOMING SOUTHWEST 15 TO
25 KNOTS AFTER MIDNIGHT. A CHANCE OF SNOW...POSSIBLY MIXED WITH
RAIN. A SLIGHT CHANCE OF FREEZING RAIN AFTER MIDNIGHT. WAVES
3 TO 6 FEET OCCASIONALLY TO 8 FEET.
.FRIDAY...SOUTHWEST WINDS 15 TO 25 KNOTS VEERING WEST BY MID
AFTERNOON. A SLIGHT CHANCE OF FREEZING RAIN THROUGH EARLY
AFTERNOON. A CHANCE OF RAIN SHOWERS...POSSIBLY MIXED WITH SNOW.
WAVES 3 TO 6 FEET OCCASIONALLY TO 8 FEET.
.FRIDAY NIGHT...WEST WINDS 10 TO 20 KNOTS BECOMING NORTHWEST
15 TO 25 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF RAIN AND SNOW
SHOWERS. WAVES SUBSIDING TO 2 TO 4 FEET.
.SATURDAY...NORTHWEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO 1 TO 3 FEET.
.SATURDAY NIGHT...NORTH WINDS 10 TO 20 KNOTS VEERING EAST AFTER
MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET...THEN BUILDING TO
1 TO 3 FEET.
.SUNDAY...EAST WINDS 15 TO 25 KNOTS BECOMING NORTHEAST 20 TO
30 KNOTS. RAIN SHOWERS...POSSIBLY MIXED WITH SNOW SHOWERS. WAVES
BUILDING TO 5 TO 8 FEET OCCASIONALLY TO 10 FEET.
.MONDAY...EAST WINDS 20 TO 30 KNOTS BECOMING SOUTHEAST 15 TO
25 KNOTS. RAIN SHOWERS...POSSIBLY MIXED WITH SNOW SHOWERS...THEN
A CHANCE OF RAIN SHOWERS...POSSIBLY MIXED WITH SNOW. WAVES
BUILDING TO 7 TO 10 FEET OCCASIONALLY TO 13 FEET...THEN SUBSIDING
TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.

$$

LSZ267-272215-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
1011 AM EDT THU APR 27 2017

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

$$
LSZ261-272215-
MAFOR 2715/
SUPERIOR WEST 11727 11737 11730 11640 14630. CHANCE OF LIGHT
FREEZING RAIN LATE THIS MORNING. CHANCE OF SNOW TONIGHT THROUGH
FRIDAY MORNING. WAVES 3 TO 5 FEET.

SUPERIOR NORTH CENTRAL 11847 12747 11647 14630. CHANCE OF LIGHT
FREEZING RAIN THROUGH EARLY THIS EVENING...THEN CHANCE OF SNOW
FROM LATE EVENING ON TONIGHT THROUGH FRIDAY MORNING. WAVES 4 TO
6 FEET.

SUPERIOR SOUTH CENTRAL 11736 11746 11647 11640 11630 13530.
CHANCE OF LIGHT FREEZING RAIN EARLY THIS AFTERNOON. CHANCE OF SNOW
LATE THIS AFTERNOON THROUGH LATE THIS EVENING. WAVES 3 TO 7 FEET
SUBSIDING TO 2 TO 4 FEET TONIGHT AND FRIDAY MORNING.

SUPERIOR EAST 11110 11520 11640 11540 14530. CHANCE OF RAIN THIS
AFTERNOON THROUGH EARLY THIS EVENING...THEN CHANCE OF SNOW AND
RAIN LATE IN THE EVENING. CHANCE OF SNOW AFTER MIDNIGHT TONIGHT.
CHANCE OF LIGHT FREEZING OVERNIGHT THROUGH MID FRIDAY MORNING.
WAVES 2 TO 7 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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