Great Lakes Forecast
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000
FZUS63 KMQT 270201
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
1001 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 OVER CENTRAL UPPER MICHIGAN
LATE THIS EVENING WILL TRACK ACROSS EASTERN LAKE SUPERIOR
OVERNIGHT AS ANOTHER LOW PRESSURE SYSTEM OF 29.3 INCHES ORGANIZES
OVER THE MID MISSISSIPPI 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.

LSZ162-271015-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
1001 PM EDT WED APR 26 2017 /901 PM CDT WED APR 26 2017/

.REST OF TONIGHT...NORTH WINDS 20 TO 30 KNOTS DIMINISHING TO
10 TO 20 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF FREEZING RAIN
THROUGH MIDNIGHT...THEN A CHANCE OF FREEZING RAIN. WAVES 6 TO 9
FEET OCCASIONALLY TO 11 FEET 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.

$$

LSZ263-271015-
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-
1001 PM EDT WED APR 26 2017

.REST OF TONIGHT...NORTH WINDS 20 TO 30 KNOTS DIMINISHING TO
15 TO 25 KNOTS AFTER MIDNIGHT. A CHANCE OF FREEZING RAIN. A
SLIGHT CHANCE OF SLEET AFTER MIDNIGHT. WAVES 8 TO 11 FEET
OCCASIONALLY TO 14 FEET SUBSIDING TO 3 TO 6 FEET OCCASIONALLY TO 8
FEET.
.THURSDAY...NORTH WINDS 15 TO 25 KNOTS BACKING WEST LATE. SLEET
LIKELY THROUGH EARLY AFTERNOON. SNOW LIKELY...POSSIBLY MIXED WITH
FREEZING RAIN. WAVES 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.

$$

LSZ264-271015-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
1001 PM EDT WED APR 26 2017

.REST OF TONIGHT...NORTHEAST WINDS 20 TO 30 KNOTS BECOMING NORTH
15 TO 25 KNOTS AFTER MIDNIGHT. A FEW GALE FORCE GUSTS TO 35 KNOTS
THROUGH MIDNIGHT. A SLIGHT CHANCE OF RAIN THROUGH MIDNIGHT...THEN
RAIN OR FREEZING RAIN BECOMING LIKELY OVERNIGHT. WAVES 8 TO 11
FEET OCCASIONALLY TO 14 FEET SUBSIDING TO 3 TO 6 FEET OCCASIONALLY
TO 8 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 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.

$$

LSZ265-271015-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
1001 PM EDT WED APR 26 2017

.REST OF TONIGHT...NORTH WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS LATE. A SLIGHT CHANCE OF RAIN...BECOMING LIKELY OVERNIGHT.
WAVES 4 TO 7 FEET OCCASIONALLY TO 9 FEET SUBSIDING TO 3 TO 6 FEET
OCCASIONALLY TO 8 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.

$$

LSZ266-271015-
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-
1001 PM EDT WED APR 26 2017

.REST OF TONIGHT...NORTHEAST WINDS 20 TO 30 KNOTS BECOMING NORTH
15 TO 25 KNOTS AFTER MIDNIGHT...THEN DIMINISHING TO 10 TO
20 KNOTS LATE. A CHANCE OF RAIN...BECOMING LIKELY LATE. AREAS OF
FOG. WAVES 7 TO 11 FEET OCCASIONALLY TO 13 FEET SUBSIDING TO 3 TO
6 FEET OCCASIONALLY TO 8 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 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.

$$

LSZ267-271015-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
1001 PM EDT WED APR 26 2017

.REST OF TONIGHT...SOUTH WINDS 10 TO 20 KNOTS BECOMING WEST 5 TO
15 KNOTS THROUGH THE NIGHT. A SLIGHT CHANCE OF RAIN...BECOMING
LIKELY OVERNIGHT. AREAS OF FOG. WAVES 3 TO 5 FEET OCCASIONALLY TO
7 FEET SUBSIDING TO 1 TO 3 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 1 TO 3 FEET 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.

$$
LSZ261-271015-
MAFOR 2703/
SUPERIOR WEST...GALE WARNING IN EFFECT...14830 12720 11730 11630.
CHANCE OF FREEZING RAIN THROUGH THURSDAY MORNING. CHANCE OF RAIN
AND SNOW THURSDAY AND THURSDAY EVENING. WAVES 5 TO 10 FEET
OVERNIGHT SUBSIDING TO 3 TO 6 FEET THURSDAY AND THURSDAY EVENING.

SUPERIOR NORTH CENTRAL...GALE WARNING IN EFFECT...11140 11830
12836 11846 11746 11647 11640. CHANCE OF FREEZING RAIN AND RAIN
LATE OVERNIGHT. CHANCE OF SNOW SHOWERS LATE THURSDAY EVENING.
WAVES 7 TO 11 FEET SUBSIDING TO 5 TO 8 FEET OVERNIGHT. WAVES 4 TO
7 FEET THURSDAY AND THURSDAY EVENING.

SUPERIOR SOUTH CENTRAL 12720 12826 11736 11747 11647 11640.
CHANCE OF RAIN AND SNOW SHOWERS THURSDAY EVENING. WAVES 3 TO 7
FEET.

SUPERIOR EAST 11413 11516 11716 11116 11610 11630 11640 11540.
AREAS OF FOG TONIGHT. CHANCE OF RAIN LATE THURSDAY MORNING
THROUGH THURSDAY EVENING. CHANCE OF SNOW SHOWERS THURSDAY EVENING.
WAVES 2 TO 6 FEET OVERNIGHT AND THURSDAY BUILDING TO 5 TO 7 FEET
THURSDAY EVENING.

$$

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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