Great Lakes Forecast
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000
FZUS63 KMQT 272000
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
400 PM 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 LOW PRESSURE SYSTEM AT 29.2 INCHES OVER FAR EASTERN
LAKE SUPERIOR WILL LIFT NORTHWARD TO JAMES BAY BY LATE TONIGHT. 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.

LSZ162-280400-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
400 PM EDT THU APR 27 2017 /300 PM CDT THU APR 27 2017/

.LATE THIS AFTERNOON...WEST WINDS 15 TO 25 KNOTS. A CHANCE OF
SNOW. WAVES 2 TO 4 FEET.
.TONIGHT...WEST WINDS 15 TO 25 KNOTS. ISOLATED SNOW SHOWERS.
WAVES 2 TO 4 FEET.
.FRIDAY...WEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO 20 KNOTS
BY MID AFTERNOON. A SLIGHT CHANCE OF RAIN AND SNOW SHOWERS
THROUGH EARLY AFTERNOON. WAVES SUBSIDING TO 1 TO 3 FEET.
.FRIDAY NIGHT...NORTHWEST WINDS 10 TO 20 KNOTS VEERING NORTH
AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.SATURDAY...NORTH WINDS 5 TO 15 KNOTS VEERING EAST 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 20 TO
30 KNOTS BY MID AFTERNOON. A CHANCE OF RAIN SHOWERS. A CHANCE OF
SNOW SHOWERS BY MID AFTERNOON. WAVES BUILDING TO 3 TO 5 FEET
OCCASIONALLY TO 7 FEET.
.SUNDAY NIGHT...NORTHEAST WINDS 20 TO 30 KNOTS INCREASING TO
GALES TO 35 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN AND SNOW
SHOWERS THROUGH MIDNIGHT...THEN RAIN AND SNOW SHOWERS LIKELY
AFTER MIDNIGHT. WAVES BUILDING TO 6 TO 9 FEET OCCASIONALLY TO
11 FEET.
.MONDAY...NORTHEAST GALES TO 35 KNOTS BECOMING NORTH 15 TO
25 KNOTS. SNOW SHOWERS. RAIN SHOWERS LIKELY. A CHANCE OF SNOW
SHOWERS. WAVES BUILDING TO 7 TO 10 FEET OCCASIONALLY TO 13 FEET...
THEN SUBSIDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
.TUESDAY...NORTHWEST WINDS 15 TO 25 KNOTS BECOMING NORTH 10 TO
20 KNOTS. A CHANCE OF RAIN SHOWERS...POSSIBLY MIXED WITH SNOW.
WAVES SUBSIDING TO CALM TO 2 FEET.

$$

LSZ263-280400-
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-
400 PM EDT THU APR 27 2017

.LATE THIS AFTERNOON...WEST WINDS 15 TO 25 KNOTS. SNOW. WAVES
3 TO 5 FEET OCCASIONALLY TO 7 FEET.
.TONIGHT...WEST WINDS 15 TO 25 KNOTS. SCATTERED SNOW SHOWERS.
WAVES BUILDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.
.FRIDAY...WEST WINDS 15 TO 25 KNOTS. A CHANCE OF RAIN AND SNOW
SHOWERS. WAVES SUBSIDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
.FRIDAY NIGHT...NORTHWEST WINDS 10 TO 20 KNOTS BECOMING NORTH
5 TO 15 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET...
THEN BUILDING TO 1 TO 3 FEET.
.SATURDAY...NORTH WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
.SATURDAY NIGHT...NORTHEAST WINDS 5 TO 15 KNOTS INCREASING TO
10 TO 20 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.SUNDAY...NORTHEAST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS BY MID AFTERNOON. A CHANCE OF RAIN SHOWERS. WAVES
BUILDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
.SUNDAY NIGHT...NORTHEAST WINDS 15 TO 25 KNOTS INCREASING TO
GALES TO 35 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN SHOWERS...
POSSIBLY MIXED WITH SNOW THROUGH MIDNIGHT...THEN RAIN AND SNOW
SHOWERS LIKELY AFTER MIDNIGHT. WAVES BUILDING TO 6 TO 9 FEET
OCCASIONALLY TO 11 FEET.
.MONDAY...NORTHEAST GALES TO 35 KNOTS BECOMING NORTH 20 TO
30 KNOTS. SNOW SHOWERS. RAIN SHOWERS. A CHANCE OF SNOW SHOWERS.
WAVES BUILDING TO 7 TO 10 FEET OCCASIONALLY TO 13 FEET...THEN
SUBSIDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
.TUESDAY...NORTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS. A CHANCE OF SNOW SHOWERS. A CHANCE OF RAIN SHOWERS.
WAVES SUBSIDING TO CALM TO 2 FEET.

$$

LSZ264-280400-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
400 PM EDT THU APR 27 2017

.LATE THIS AFTERNOON...NORTHWEST WINDS 20 TO 30 KNOTS. SNOW.
WAVES 3 TO 6 FEET OCCASIONALLY TO 8 FEET.
.TONIGHT...WEST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS AFTER MIDNIGHT. NUMEROUS SNOW SHOWERS THROUGH MIDNIGHT...
THEN SCATTERED SNOW SHOWERS AFTER MIDNIGHT. WAVES 3 TO 6 FEET
OCCASIONALLY TO 8 FEET.
.FRIDAY...WEST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO 30 KNOTS
BY MID AFTERNOON. A CHANCE OF SNOW SHOWERS...POSSIBLY MIXED WITH
RAIN. WAVES SUBSIDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.
.FRIDAY NIGHT...NORTHWEST WINDS 10 TO 20 KNOTS. WAVES SUBSIDING
TO 2 TO 4 FEET.
.SATURDAY...NORTH WINDS 5 TO 15 KNOTS BACKING NORTHWEST 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 5 TO 15 KNOTS BECOMING NORTHEAST 10 TO
20 KNOTS BY MID AFTERNOON. WAVES BUILDING TO 1 TO 3 FEET.
.SUNDAY NIGHT...NORTHEAST WINDS 10 TO 20 KNOTS INCREASING TO
20 TO 30 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN SHOWERS...
POSSIBLY MIXED WITH SNOW THROUGH MIDNIGHT...THEN RAIN AND SNOW
SHOWERS LIKELY AFTER MIDNIGHT. WAVES BUILDING TO 4 TO 7 FEET
OCCASIONALLY TO 9 FEET.
.MONDAY...NORTHEAST GALES TO 35 KNOTS DIMINISHING TO 20 TO
30 KNOTS. RAIN SHOWERS...POSSIBLY MIXED WITH SNOW SHOWERS. WAVES
BUILDING TO 7 TO 10 FEET OCCASIONALLY TO 13 FEET...THEN SUBSIDING
TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
.TUESDAY...NORTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS. A CHANCE OF RAIN AND SNOW SHOWERS. WAVES SUBSIDING TO
1 TO 3 FEET.

$$

LSZ265-280400-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
400 PM EDT THU APR 27 2017

.LATE THIS AFTERNOON...WEST WINDS 20 TO 30 KNOTS. SNOW...POSSIBLY
MIXED WITH RAIN AND FREEZING RAIN LIKELY. 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. SCATTERED SNOW SHOWERS.
WAVES SUBSIDING TO 2 TO 4 FEET.
.FRIDAY...WEST WINDS 15 TO 25 KNOTS. A CHANCE OF RAIN AND SNOW
SHOWERS. WAVES 2 TO 4 FEET.
.FRIDAY NIGHT...NORTHWEST WINDS 15 TO 25 KNOTS. WAVES SUBSIDING
TO 1 TO 3 FEET...THEN BUILDING TO 2 TO 4 FEET.
.SATURDAY...NORTH WINDS 10 TO 20 KNOTS. 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 BACKING NORTHEAST BY MID
AFTERNOON. A CHANCE OF RAIN SHOWERS. WAVES BUILDING TO 2 TO
4 FEET.
.SUNDAY NIGHT...NORTHEAST WINDS 20 TO 30 KNOTS. A CHANCE OF RAIN
SHOWERS...POSSIBLY MIXED WITH SNOW THROUGH MIDNIGHT...THEN RAIN
AND SNOW SHOWERS LIKELY AFTER MIDNIGHT. WAVES BUILDING TO 4 TO
7 FEET OCCASIONALLY TO 9 FEET.
.MONDAY...NORTHEAST WINDS 20 TO 30 KNOTS BECOMING NORTHWEST 15 TO
25 KNOTS. RAIN SHOWERS AND SNOW SHOWERS...THEN A CHANCE OF RAIN
AND SNOW SHOWERS. WAVES BUILDING TO 6 TO 9 FEET OCCASIONALLY TO
11 FEET...THEN SUBSIDING TO 2 TO 4 FEET.
.TUESDAY...NORTHWEST WINDS 15 TO 25 KNOTS. A CHANCE OF RAIN AND
SNOW SHOWERS. WAVES SUBSIDING TO 2 TO 4 FEET...THEN BUILDING TO
3 TO 5 FEET OCCASIONALLY TO 7 FEET.

$$

LSZ266-280400-
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-
400 PM EDT THU APR 27 2017

.LATE THIS AFTERNOON...WEST WINDS 20 TO 30 KNOTS. A CHANCE OF
RAIN...POSSIBLY MIXED WITH SNOW. WAVES 4 TO 7 FEET OCCASIONALLY
TO 9 FEET.
.TONIGHT...WEST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS AFTER MIDNIGHT. SCATTERED SNOW SHOWERS...POSSIBLY MIXED
WITH RAIN. WAVES SUBSIDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.
.FRIDAY...WEST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO 30 KNOTS
BY MID AFTERNOON. A CHANCE OF RAIN AND SNOW SHOWERS. WAVES 3 TO
6 FEET OCCASIONALLY TO 8 FEET.
.FRIDAY NIGHT...NORTHWEST WINDS 15 TO 25 KNOTS. WAVES SUBSIDING
TO 2 TO 4 FEET.
.SATURDAY...NORTH WINDS 10 TO 20 KNOTS. 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 BACKING NORTHEAST BY MID
AFTERNOON. A CHANCE OF RAIN SHOWERS. WAVES BUILDING TO 2 TO
4 FEET.
.SUNDAY NIGHT...NORTHEAST WINDS 20 TO 30 KNOTS. A CHANCE OF RAIN
SHOWERS...POSSIBLY MIXED WITH SNOW THROUGH MIDNIGHT...THEN RAIN
AND SNOW SHOWERS LIKELY AFTER MIDNIGHT. WAVES BUILDING TO 5 TO
8 FEET OCCASIONALLY TO 10 FEET.
.MONDAY...EAST GALES TO 35 KNOTS DIMINISHING TO 20 TO 30 KNOTS.
RAIN SHOWERS LIKELY WITH POCKETS OF SNOW SHOWERS...THEN A CHANCE
OF RAIN SHOWERS...POSSIBLY MIXED WITH SNOW. WAVES BUILDING TO
6 TO 9 FEET OCCASIONALLY TO 11 FEET...THEN SUBSIDING TO 3 TO
5 FEET OCCASIONALLY TO 7 FEET.
.TUESDAY...NORTHWEST WINDS 15 TO 25 KNOTS VEERING NORTH. A CHANCE
OF RAIN SHOWERS...POSSIBLY MIXED WITH SNOW. WAVES BUILDING TO
3 TO 6 FEET OCCASIONALLY TO 8 FEET...THEN SUBSIDING TO 1 TO
3 FEET.

$$

LSZ267-280400-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
400 PM EDT THU APR 27 2017

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

$$

LSZ261-280400-
MAFOR 2721/
SUPERIOR WEST 11730 15630 11630. CHANCE OF SNOW THROUGH EARLY
EVENING. SCATTERED SNOW SHOWERS FROM LATE EVENING ON TONIGHT.
WAVES 3 TO 5 FEET SUBSIDING TO 2 TO 4 FEET...THEN BUILDING TO 3
TO 5 FEET TONIGHT. WAVES 3 TO 5 FEET SUBSIDING TO 2 TO 4 FEET
FRIDAY.

SUPERIOR NORTH CENTRAL 11747 11647 13640 11630 12640. SCATTERED
SNOW SHOWERS OVERNIGHT. CHANCE OF SNOW SHOWERS THROUGH MID
MORNING...THEN CHANCE OF SNOW AND RAIN SHOWERS LATE IN THE
MORNING. CHANCE OF RAIN AND SNOW SHOWERS EARLY FRIDAY AFTERNOON.
WAVES 4 TO 6 FEET.

SUPERIOR SOUTH CENTRAL 11647 11640 15630. SCATTERED SNOW SHOWERS
WITH A CHANCE OF RAIN THROUGH EARLY EVENING. SCATTERED SNOW
SHOWERS TONIGHT. WAVES 4 TO 7 FEET SUBSIDING TO 2 TO 4 FEET
TONIGHT. WAVES 2 TO 4 FEET FRIDAY.

SUPERIOR EAST 12640 11540 11630 12530 12630. CHANCE OF RAIN EARLY
THIS EVENING...THEN SCATTERED RAIN SHOWERS THROUGH EARLY EVENING.
SCATTERED RAIN AND SNOW SHOWERS FROM LATE EVENING ON TONIGHT.
CHANCE OF RAIN AND SNOW SHOWERS THROUGH EARLY AFTERNOON FRIDAY.
WAVES 3 TO 5 FEET BUILDING TO 4 TO 7 FEET TONIGHT. WAVES 3 TO 6
FEET FRIDAY.

$$

TITUS

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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