Great Lakes Forecast
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789
FZUS63 KMQT 262006
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
406 PM EDT WED APR 26 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 SYSTEM OVER NORTHEAST
WISCONSIN LATE THIS AFTERNOON WILL TRACK TO EASTERN LAKE SUPERIOR
THROUGH THIS EVENING AS ANOTHER LOW PRESSURE SYSTEM OF 29.3 INCHES
ORGANIZES OVER THE MID MISSISSIPPI RIVER VALLEY. THIS LOW WILL
LIFT NORTHWARD ACROSS EASTERN UPPER MICHIGAN AND LAKE SUPERIOR ON
THURSDAY WHILE DEEPENING TO 29.3 INCHES THURSDAY MORNING BEFORE
REACHING JAMES BAY LATE THURSDAY NIGHT. A RIDGE WILL BUILD FROM
30.0 INCHES TO 30.3 INCHES OVER THE UPPER GREAT LAKES ON FRIDAY
THROUGH SATURDAY. THE RIDGE WILL DRIFT NORTHWARD ON SUNDAY AS 29.5
INCH LOW PRESSURE MOVES NORTHWARD INTO THE MID MISSISSIPPI
VALLEY.

LSZ162-270415-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
406 PM EDT WED APR 26 2017 /306 PM CDT WED APR 26 2017/

...GALE WARNING IN EFFECT UNTIL 11 PM EDT /10 PM CDT/ THIS
EVENING...

.LATE THIS AFTERNOON...NORTHEAST GALES TO 40 KNOTS DIMINISHING TO
35 KNOTS. FREEZING RAIN LIKELY. A CHANCE OF SNOW AND SLEET. WAVES
10 TO 14 FEET OCCASIONALLY TO 18 FEET SUBSIDING TO 8 TO 11 FEET
OCCASIONALLY TO 14 FEET.
.TONIGHT...NORTH WINDS 20 TO 30 KNOTS DIMINISHING TO 10 TO
20 KNOTS. GALE FORCE GUSTS TO 35 KNOTS IN THE EVENING. A CHANCE
OF FREEZING RAIN. WAVES SUBSIDING TO 3 TO 6 FEET OCCASIONALLY TO 8
FEET.
.THURSDAY...NORTH WINDS 10 TO 20 KNOTS BECOMING NORTHWEST 15 TO
25 KNOTS IN THE AFTERNOON. A SLIGHT CHANCE OF FREEZING RAIN
THROUGH EARLY AFTERNOON. A CHANCE OF SNOW. A SLIGHT CHANCE OF
RAIN BY MID AFTERNOON. WAVES SUBSIDING TO 2 TO 4 FEET.
.THURSDAY NIGHT...WEST WINDS 15 TO 25 KNOTS. A SLIGHT CHANCE OF
RAIN SHOWERS THROUGH MIDNIGHT. A SLIGHT CHANCE OF SNOW SHOWERS.
WAVES SUBSIDING TO 1 TO 3 FEET...THEN BUILDING TO 2 TO 4 FEET.
.FRIDAY...WEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO 20 KNOTS
BY MID AFTERNOON. A SLIGHT CHANCE OF SNOW SHOWERS THROUGH EARLY
AFTERNOON. A SLIGHT CHANCE OF RAIN SHOWERS. WAVES SUBSIDING TO
CALM TO 2 FEET.
.FRIDAY NIGHT...NORTHWEST WINDS 10 TO 20 KNOTS. WAVES 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 INCREASING TO 10 TO
20 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.SUNDAY...NORTHEAST WINDS 15 TO 25 KNOTS INCREASING TO GALES TO
35 KNOTS. RAIN SHOWERS...POSSIBLY MIXED WITH SNOW SHOWERS. WAVES
BUILDING TO 5 TO 8 FEET OCCASIONALLY TO 10 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 SUBSIDING TO 2 TO
4 FEET.

$$

LSZ263-270415-
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-
406 PM EDT WED APR 26 2017

...GALE WARNING IN EFFECT UNTIL 2 AM EDT THURSDAY...

.LATE THIS AFTERNOON...NORTHEAST GALES TO 40 KNOTS. FREEZING RAIN
LIKELY...POSSIBLY MIXED WITH SLEET. WAVES 10 TO 14 FEET
OCCASIONALLY TO 18 FEET SUBSIDING TO 9 TO 12 FEET OCCASIONALLY TO
15 FEET.
.TONIGHT...NORTHEAST GALES TO 35 KNOTS BECOMING NORTH 20 TO
30 KNOTS AFTER MIDNIGHT...THEN DIMINISHING TO 15 TO 25 KNOTS
LATE. A CHANCE OF FREEZING RAIN. A SLIGHT CHANCE OF SLEET AFTER
MIDNIGHT. WAVES SUBSIDING TO 4 TO 7 FEET OCCASIONALLY TO 9 FEET.
.THURSDAY...NORTH WINDS 15 TO 25 KNOTS BACKING WEST LATE. SLEET
LIKELY THROUGH EARLY AFTERNOON. SNOW LIKELY...POSSIBLY MIXED WITH
FREEZING RAIN. WAVES SUBSIDING TO 3 TO 5 FEET OCCASIONALLY TO 7
FEET.
.THURSDAY NIGHT...WEST WINDS 15 TO 25 KNOTS. A CHANCE OF RAIN
SHOWERS THROUGH MIDNIGHT. A CHANCE OF SNOW SHOWERS. WAVES 3 TO
5 FEET OCCASIONALLY TO 7 FEET.
.FRIDAY...WEST WINDS 15 TO 25 KNOTS. A CHANCE OF RAIN AND SNOW
SHOWERS. WAVES SUBSIDING TO 2 TO 4 FEET.
.FRIDAY NIGHT...NORTHWEST WINDS 10 TO 20 KNOTS DIMINISHING TO
5 TO 15 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.SATURDAY...NORTH WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
.SATURDAY NIGHT...NORTHEAST WINDS 5 TO 15 KNOTS VEERING EAST
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.SUNDAY...NORTHEAST WINDS 15 TO 25 KNOTS INCREASING TO GALES TO
35 KNOTS. RAIN SHOWERS...POSSIBLY MIXED WITH SNOW. WAVES BUILDING
TO 5 TO 8 FEET OCCASIONALLY TO 10 FEET.
.MONDAY...NORTHEAST GALES TO 35 KNOTS BECOMING NORTH 15 TO
25 KNOTS. RAIN AND SNOW SHOWERS. WAVES BUILDING TO 6 TO 9 FEET
OCCASIONALLY TO 11 FEET...THEN SUBSIDING TO 3 TO 5 FEET
OCCASIONALLY TO 7 FEET.

$$

LSZ264-270415-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
406 PM EDT WED APR 26 2017

...GALE WARNING IN EFFECT UNTIL 3 AM EDT THURSDAY...

.LATE THIS AFTERNOON...NORTHEAST GALES TO 40 KNOTS. RAIN OR
FREEZING RAIN. WAVES 10 TO 14 FEET OCCASIONALLY TO 18 FEET
SUBSIDING TO 9 TO 12 FEET OCCASIONALLY TO 15 FEET.
.TONIGHT...NORTHEAST GALES TO 35 KNOTS DIMINISHING TO 20 TO
30 KNOTS AFTER MIDNIGHT...THEN BECOMING NORTH 15 TO 25 KNOTS
LATE. A CHANCE OF RAIN OR FREEZING RAIN THROUGH MIDNIGHT...THEN
RAIN OR FREEZING RAIN LIKELY. WAVES SUBSIDING TO 4 TO 7 FEET
OCCASIONALLY TO 9 FEET.
.THURSDAY...NORTH WINDS 15 TO 25 KNOTS BECOMING NORTHWEST 20 TO
30 KNOTS LATE. RAIN OR FREEZING RAIN...POSSIBLY MIXED WITH SLEET
THROUGH EARLY AFTERNOON...THEN SNOW LIKELY...POSSIBLY MIXED WITH
FREEZING RAIN. WAVES SUBSIDING TO 3 TO 5 FEET OCCASIONALLY TO 7
FEET.
.THURSDAY NIGHT...WEST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF RAIN OR FREEZING RAIN
THROUGH MIDNIGHT. A CHANCE OF 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 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
.FRIDAY NIGHT...NORTHWEST WINDS 10 TO 20 KNOTS. WAVES SUBSIDING
TO 1 TO 3 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 10 TO 20 KNOTS BECOMING NORTHEAST 20 TO
30 KNOTS. RAIN SHOWERS...POSSIBLY MIXED WITH SNOW SHOWERS. WAVES
BUILDING TO 4 TO 7 FEET OCCASIONALLY TO 9 FEET.
.MONDAY...NORTHEAST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS. RAIN SHOWERS...POSSIBLY MIXED WITH SNOW SHOWERS. WAVES
BUILDING TO 6 TO 9 FEET OCCASIONALLY TO 11 FEET...THEN SUBSIDING
TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.

$$

LSZ265-270415-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
406 PM EDT WED APR 26 2017

.LATE THIS AFTERNOON...NORTHEAST WINDS 15 TO 25 KNOTS. RAIN.
WAVES 7 TO 10 FEET OCCASIONALLY TO 13 FEET SUBSIDING TO 5 TO 8
FEET OCCASIONALLY TO 10 FEET.
.TONIGHT...NORTH WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS LATE. A CHANCE OF RAIN THROUGH MIDNIGHT...THEN RAIN
LIKELY. WAVES SUBSIDING TO 4 TO 8 FEET OCCASIONALLY TO 10 FEET.
.THURSDAY...NORTHWEST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO
30 KNOTS IN THE AFTERNOON...THEN BACKING WEST LATE. RAIN. SNOW
LIKELY BY MID AFTERNOON. WAVES SUBSIDING TO 2 TO 4 FEET...THEN
BUILDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
.THURSDAY NIGHT...WEST WINDS 15 TO 25 KNOTS BECOMING SOUTHWEST
20 TO 30 KNOTS LATE. A CHANCE OF RAIN AND SNOW SHOWERS. WAVES
SUBSIDING TO 2 TO 4 FEET.
.FRIDAY...WEST WINDS 15 TO 25 KNOTS. A CHANCE OF RAIN AND SNOW
SHOWERS. WAVES SUBSIDING TO 1 TO 3 FEET...THEN BUILDING TO 2 TO
4 FEET.
.FRIDAY NIGHT...WEST WINDS 10 TO 20 KNOTS BECOMING NORTHWEST
15 TO 25 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO
2 FEET...THEN BUILDING TO 1 TO 3 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 BECOMING NORTHEAST 20 TO
30 KNOTS. A CHANCE OF SNOW SHOWERS...POSSIBLY MIXED WITH RAIN...
THEN RAIN SHOWERS...POSSIBLY MIXED WITH SNOW. WAVES BUILDING TO
2 TO 4 FEET...THEN SUBSIDING TO 1 TO 3 FEET.
.MONDAY...NORTHEAST WINDS 20 TO 30 KNOTS BECOMING NORTH 15 TO
25 KNOTS. RAIN SHOWERS...POSSIBLY MIXED WITH SNOW...THEN A CHANCE
OF RAIN AND SNOW SHOWERS. WAVES BUILDING TO 5 TO 8 FEET
OCCASIONALLY TO 10 FEET...THEN SUBSIDING TO 3 TO 5 FEET
OCCASIONALLY TO 7 FEET.

$$

LSZ266-270415-
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-
406 PM EDT WED APR 26 2017

.LATE THIS AFTERNOON...EAST WINDS 20 TO 30 KNOTS. OCCASIONAL GALE
FORCE GUSTS TO 35 KNOTS NORTH HALF. RAIN. WAVES 8 TO 11 FEET
OCCASIONALLY TO 14 FEET.
.TONIGHT...NORTHEAST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS AFTER MIDNIGHT...THEN BACKING NORTH LATE. A CHANCE OF
RAIN THROUGH MIDNIGHT...THEN RAIN. WAVES 7 TO 11 FEET
OCCASIONALLY TO 14 FEET.
.THURSDAY...NORTH WINDS 15 TO 25 KNOTS BACKING NORTHWEST IN THE
AFTERNOON...THEN BECOMING WEST 20 TO 30 KNOTS LATE. RAIN LIKELY.
A CHANCE OF SNOW BY MID AFTERNOON. WAVES SUBSIDING TO 3 TO 6 FEET
OCCASIONALLY TO 8 FEET.
.THURSDAY NIGHT...WEST WINDS 20 TO 30 KNOTS BECOMING SOUTHWEST
15 TO 25 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN SHOWERS...
POSSIBLY MIXED WITH FREEZING RAIN AND SNOW. WAVES SUBSIDING TO 3
TO 5 FEET OCCASIONALLY TO 7 FEET.
.FRIDAY...WEST WINDS 15 TO 25 KNOTS. A CHANCE OF RAIN AND SNOW
SHOWERS. WAVES 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
.FRIDAY NIGHT...WEST WINDS 10 TO 20 KNOTS BECOMING NORTHWEST
15 TO 25 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET.
.SATURDAY...NORTHWEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.SATURDAY NIGHT...NORTH WINDS 10 TO 20 KNOTS VEERING EAST AFTER
MIDNIGHT. WAVES BUILDING TO 1 TO 3 FEET.
.SUNDAY...EAST WINDS 10 TO 20 KNOTS BECOMING NORTHEAST 20 TO
30 KNOTS. A CHANCE OF RAIN AND SNOW SHOWERS...THEN RAIN SHOWERS...
POSSIBLY MIXED WITH SNOW. WAVES BUILDING TO 2 TO 4 FEET...THEN
SUBSIDING TO 1 TO 3 FEET.
.MONDAY...EAST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS. RAIN SHOWERS...POSSIBLY MIXED WITH SNOW...THEN A CHANCE
OF RAIN SHOWERS...POSSIBLY MIXED WITH SNOW. WAVES SUBSIDING TO 3
TO 5 FEET OCCASIONALLY TO 7 FEET.

$$

LSZ267-270415-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
406 PM EDT WED APR 26 2017

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

$$

LSZ261-270415-
MAFOR 2621/
SUPERIOR WEST...GALE WARNING IN EFFECT...11150 11140 11840 13830
12720. CHANCE OF RAIN OR FREEZING RAIN. CHANCE OF SNOW THURSDAY.
WAVES 9 TO 13 FEET SUBSIDING TO 6 TO 10 FEET TONIGHT. WAVES
SUBSIDING TO 3 TO 5 FEET THURSDAY.

SUPERIOR NORTH CENTRAL...GALE WARNING IN EFFECT...11156 11150
12140 11836 12846 11746. CHANCE OF FREEZING RAIN TONIGHT. CHANCE
OF SNOW LATE THURSDAY. WAVES 9 TO 13 FEET SUBSIDING TO 6 TO 9 FEET
TONIGHT. WAVES SUBSIDING TO 4 TO 7 FEET THURSDAY.

SUPERIOR SOUTH CENTRAL 11130 19140 12820 13726 11736 11747.
CHANCE OF RAIN THIS EVENING. WAVES 5 TO 9 FEET TONIGHT SUBSIDING
TO 3 TO 6 FEET THURSDAY.

SUPERIOR EAST 11246 11230 11320 13216 11520 11630. CHANCE OF RAIN
FROM THURSDAY MORNING. WAVES 5 TO 9 FEET SUBSIDING TO 3 TO 6 FEET
TONIGHT. WAVES 2 TO 4 FEET THURSDAY.

$$

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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