Great Lakes Forecast
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685
FZUS63 KMQT 270747
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
347 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 WILL
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.

LSZ162-271600-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
347 AM EDT THU APR 27 2017 /247 AM CDT THU APR 27 2017/

.EARLY THIS MORNING...NORTH WINDS 15 TO 25 KNOTS. A SLIGHT CHANCE
OF FREEZING RAIN. WAVES 3 TO 6 FEET OCCASIONALLY TO 8 FEET.
.TODAY...NORTH WINDS 15 TO 25 KNOTS BACKING NORTHWEST BY MID
AFTERNOON. A SLIGHT CHANCE OF FREEZING RAIN THROUGH EARLY
AFTERNOON. A CHANCE OF SNOW. WAVES 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.

$$

LSZ263-271600-
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-
347 AM EDT THU APR 27 2017

.EARLY THIS MORNING...NORTH WINDS 15 TO 25 KNOTS. A CHANCE OF
SNOW...SLEET AND FREEZING RAIN. WAVES 4 TO 7 FEET OCCASIONALLY TO
9 FEET SUBSIDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.
.TODAY...NORTH WINDS 15 TO 25 KNOTS BACKING NORTHWEST BY MID
AFTERNOON. SLEET...POSSIBLY MIXED WITH FREEZING RAIN THROUGH
EARLY AFTERNOON. SNOW. WAVES SUBSIDING TO 3 TO 5 FEET
OCCASIONALLY TO 7 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.

$$

LSZ264-271600-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
347 AM EDT THU APR 27 2017

.EARLY THIS MORNING...NORTH WINDS 15 TO 25 KNOTS. A CHANCE OF
FREEZING RAIN...POSSIBLY MIXED WITH RAIN. WAVES 4 TO 7 FEET
OCCASIONALLY TO 9 FEET SUBSIDING TO 3 TO 6 FEET OCCASIONALLY TO
8 FEET.
.TODAY...NORTH WINDS 15 TO 25 KNOTS BECOMING NORTHWEST 20 TO
30 KNOTS BY MID AFTERNOON. FREEZING RAIN...POSSIBLY MIXED WITH
SLEET THROUGH EARLY AFTERNOON. SNOW...POSSIBLY MIXED WITH RAIN. A
SLIGHT CHANCE OF FREEZING RAIN BY MID AFTERNOON. 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.

$$

LSZ265-271600-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
347 AM EDT THU APR 27 2017

.EARLY THIS MORNING...NORTH WINDS 15 TO 25 KNOTS. RAIN. WAVES
3 TO 6 FEET OCCASIONALLY TO 8 FEET.
.TODAY...NORTHWEST WINDS 15 TO 25 KNOTS BECOMING WEST 20 TO
30 KNOTS BY MID AFTERNOON. RAIN. SNOW LIKELY BY MID AFTERNOON.
WAVES SUBSIDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET...THEN
BUILDING TO 4 TO 7 FEET OCCASIONALLY TO 9 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.

$$

LSZ266-271600-
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-
347 AM EDT THU APR 27 2017

.EARLY THIS MORNING...NORTH WINDS 10 TO 20 KNOTS. RAIN. WAVES
4 TO 7 FEET OCCASIONALLY TO 9 FEET SUBSIDING TO 3 TO 6 FEET
OCCASIONALLY TO 8 FEET.
.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
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.

$$

LSZ267-271600-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
347 AM EDT THU APR 27 2017

.EARLY THIS MORNING...NORTHEAST WINDS 5 TO 15 KNOTS. RAIN. WAVES
CALM TO 2 FEET.
.TODAY...NORTHEAST WINDS 10 TO 20 KNOTS BECOMING WEST 15 TO
25 KNOTS BY MID AFTERNOON. A CHANCE OF RAIN. WAVES 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.

$$

LSZ261-271600-
MAFOR 2709/
SUPERIOR WEST 12830 11727 11737 11730 11640 12630. A CHANCE OF
LIGHT FREEZING RAIN LATE THIS MORNING. A CHANCE OF SNOW TONIGHT.
WAVES 3 TO 6 FEET.

SUPERIOR NORTH CENTRAL 11830 11836 11846 11746 11747 11647 12630.
A CHANCE OF RAIN EARLY THIS MORNING. A CHANCE OF LIGHT FREEZING
RAIN EARLY THIS AFTERNOON...THEN A CHANCE OF SNOW LATE TODAY
THROUGH TONIGHT. WAVES 4 TO 7 FEET.

SUPERIOR SOUTH CENTRAL 12826 11736 11746 11647 11640 11630 11530.
A CHANCE OF SNOW LATE TODAY AND THIS EVENING. WAVES 3 TO 6 FEET
BUILDING TO 4 TO 7 FEET TODAY. WAVES 4 TO 7 FEET SUBSIDING TO 2
TO 4 FEET TONIGHT.

SUPERIOR EAST 12116 11110 11520 11640 11540 12530. PATCHY FOG
EARLY THIS MORNING. A CHANCE OF RAIN THIS AFTERNOON THROUGH EARLY
EVENING...THEN A CHANCE OF SNOW AND RAIN LATE IN THE EVENING. A
CHANCE OF SNOW AFTER MIDNIGHT TONIGHT. WAVES 1 TO 3 FEET BUILDING
TO 3 TO 5 FEET TODAY. WAVES 4 TO 7 FEET TONIGHT.

$$

07

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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