Great Lakes Forecast
Issued by NWS

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary Off
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

000
FZUS63 KMQT 252009
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
409 PM EDT TUE APR 25 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 29.5 INCH LOW PRESSURE TROUGH OVER THE UPPER
MISSISSIPPI RIVER VALLEY WILL REMAIN STATIONARY THROUGH TONIGHT AS
30.5 INCH HIGH PRESSURE REMAINS OVER HUDSON BAY. A 29.4 INCH LOW
WILL ORGANIZE ALONG THIS TROUGH OVER CENTRAL WISCONSIN WEDNESDAY
MORNING...THEN LIFT NORTHWARD ACROSS UPPER MICHIGAN THURSDAY
MORNING WHILE DEEPENING TO 29.3 INCHES. THIS LOW WILL HEAD NORTH
INTO JAMES BAY BY FRIDAY MORNING AND FURTHER DEEPEN TO 29.2
INCHES. A 30.0 INCH RIDGE WILL BUILD OVER THE UPPER GREAT LAKES ON
FRIDAY. THE RIDGE WILL BUILD TO 30.3 INCHES OVER THE UPPER GREAT
LAKES ON SATURDAY.

LSZ162-260415-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
409 PM EDT TUE APR 25 2017 /309 PM CDT TUE APR 25 2017/

...GALE WARNING IN EFFECT FROM 8 PM EDT /7 PM CDT/ THIS EVENING
THROUGH WEDNESDAY EVENING...

.LATE THIS AFTERNOON...NORTHEAST WINDS 15 TO 25 KNOTS. A SLIGHT
CHANCE OF RAIN. WAVES 2 TO 4 FEET BUILDING TO 3 TO 5 FEET
OCCASIONALLY TO 7 FEET.
.TONIGHT...NORTHEAST WINDS 20 TO 30 KNOTS INCREASING TO GALES TO
40 KNOTS AFTER MIDNIGHT. RAIN SHOWERS. A CHANCE OF FREEZING RAIN
AFTER MIDNIGHT. WAVES BUILDING TO 9 TO 12 FEET OCCASIONALLY TO
15 FEET.
.WEDNESDAY...NORTHEAST GALES TO 40 KNOTS. RAIN SHOWERS...POSSIBLY
MIXED WITH FREEZING RAIN. A SLIGHT CHANCE OF SLEET BY MID
AFTERNOON. WAVES BUILDING TO 11 TO 15 FEET OCCASIONALLY TO
19 FEET...THEN SUBSIDING TO 9 TO 12 FEET OCCASIONALLY TO 15 FEET.
.WEDNESDAY NIGHT...NORTH WINDS 20 TO 30 KNOTS DIMINISHING TO
15 TO 25 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN SHOWERS AND SLEET
THROUGH MIDNIGHT. A CHANCE OF FREEZING RAIN AND SNOW SHOWERS.
WAVES SUBSIDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
.THURSDAY...NORTH WINDS 10 TO 20 KNOTS BACKING WEST BY MID
AFTERNOON. A CHANCE OF FREEZING RAIN THROUGH EARLY AFTERNOON. A
CHANCE OF RAIN AND SNOW SHOWERS. WAVES SUBSIDING TO 1 TO 3 FEET.
.THURSDAY NIGHT...WEST WINDS 15 TO 25 KNOTS. A CHANCE OF RAIN
SHOWERS THROUGH MIDNIGHT. A CHANCE OF SNOW SHOWERS. WAVES 1 TO
3 FEET.
.FRIDAY...WEST WINDS 10 TO 20 KNOTS. WAVES SUBSIDING TO CALM TO
2 FEET.
.FRIDAY NIGHT...NORTHWEST WINDS 10 TO 20 KNOTS VEERING NORTH
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.SATURDAY...NORTHEAST WINDS 10 TO 20 KNOTS VEERING EAST. WAVES
BUILDING TO 1 TO 3 FEET.
.SUNDAY...NORTHEAST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO
30 KNOTS. A CHANCE OF RAIN SHOWERS...THEN RAIN SHOWERS...POSSIBLY
MIXED WITH SNOW. WAVES BUILDING TO 6 TO 9 FEET OCCASIONALLY TO
11 FEET.

$$

LSZ263-260415-
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-
409 PM EDT TUE APR 25 2017

...GALE WARNING IN EFFECT THROUGH LATE WEDNESDAY NIGHT...

.LATE THIS AFTERNOON...NORTHEAST WINDS 15 TO 25 KNOTS. WAVES 2 TO
4 FEET BUILDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
.TONIGHT...NORTHEAST WINDS 20 TO 30 KNOTS INCREASING TO GALES TO
40 KNOTS AFTER MIDNIGHT. RAIN SHOWERS...POSSIBLY MIXED WITH
FREEZING RAIN. WAVES BUILDING TO 9 TO 12 FEET OCCASIONALLY TO
15 FEET.
.WEDNESDAY...NORTHEAST GALES TO 40 KNOTS. FREEZING RAIN THROUGH
EARLY AFTERNOON. RAIN SHOWERS. A SLIGHT CHANCE OF FREEZING RAIN
BY MID AFTERNOON. WAVES BUILDING TO 11 TO 15 FEET OCCASIONALLY TO
19 FEET...THEN SUBSIDING TO 9 TO 12 FEET OCCASIONALLY TO 15 FEET.
.WEDNESDAY NIGHT...NORTH GALES TO 35 KNOTS DIMINISHING TO 15 TO
25 KNOTS AFTER MIDNIGHT. FREEZING RAIN...POSSIBLY MIXED WITH RAIN
SHOWERS THROUGH MIDNIGHT. A SLIGHT CHANCE OF SLEET. A CHANCE OF
FREEZING RAIN...POSSIBLY MIXED WITH RAIN AND SNOW SHOWERS AFTER
MIDNIGHT. WAVES SUBSIDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.
.THURSDAY...NORTH WINDS 15 TO 25 KNOTS BECOMING WEST 10 TO
20 KNOTS BY MID AFTERNOON. A CHANCE OF RAIN SHOWERS AND FREEZING
RAIN...POSSIBLY MIXED WITH SNOW SHOWERS. WAVES SUBSIDING TO 1 TO
3 FEET.
.THURSDAY NIGHT...WEST WINDS 10 TO 20 KNOTS. A CHANCE OF RAIN
SHOWERS THROUGH MIDNIGHT. A CHANCE OF SNOW SHOWERS. WAVES 1 TO
3 FEET.
.FRIDAY...WEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO 15 KNOTS
BY MID AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.FRIDAY NIGHT...NORTHWEST WINDS 5 TO 15 KNOTS VEERING NORTH AFTER
MIDNIGHT. WAVES CALM TO 2 FEET.
.SATURDAY...NORTH WINDS 5 TO 15 KNOTS BECOMING NORTHEAST 10 TO
20 KNOTS. WAVES BUILDING TO 1 TO 3 FEET.
.SUNDAY...NORTHEAST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO
30 KNOTS. A CHANCE OF RAIN SHOWERS...THEN RAIN SHOWERS...POSSIBLY
MIXED WITH SNOW. WAVES BUILDING TO 6 TO 9 FEET OCCASIONALLY TO
11 FEET.

$$

LSZ264-260415-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
409 PM EDT TUE APR 25 2017

...GALE WARNING IN EFFECT FROM 8 PM EDT THIS EVENING THROUGH LATE
WEDNESDAY NIGHT...

.LATE THIS AFTERNOON...NORTHEAST WINDS 10 TO 20 KNOTS. WAVES 2 TO
4 FEET.
.TONIGHT...NORTHEAST WINDS 20 TO 30 KNOTS INCREASING TO GALES TO
35 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN SHOWERS THROUGH
MIDNIGHT...THEN RAIN SHOWERS...POSSIBLY MIXED WITH FREEZING RAIN
AFTER MIDNIGHT. WAVES BUILDING TO 9 TO 12 FEET OCCASIONALLY TO
15 FEET.
.WEDNESDAY...NORTHEAST GALES TO 40 KNOTS. FREEZING RAIN THROUGH
EARLY AFTERNOON. RAIN SHOWERS. A SLIGHT CHANCE OF FREEZING RAIN
BY MID AFTERNOON. WAVES BUILDING TO 10 TO 14 FEET OCCASIONALLY TO
18 FEET...THEN SUBSIDING TO 9 TO 12 FEET OCCASIONALLY TO 15 FEET.
.WEDNESDAY NIGHT...NORTH GALES TO 35 KNOTS DIMINISHING TO 20 TO
30 KNOTS AFTER MIDNIGHT. RAIN SHOWERS LIKELY...POSSIBLY MIXED
WITH FREEZING RAIN. WAVES SUBSIDING TO 3 TO 6 FEET OCCASIONALLY
TO 8 FEET.
.THURSDAY...NORTH WINDS 15 TO 25 KNOTS BACKING WEST BY MID
AFTERNOON. A SLIGHT CHANCE OF SLEET THROUGH EARLY AFTERNOON. A
CHANCE OF RAIN SHOWERS...POSSIBLY MIXED WITH FREEZING RAIN AND
SNOW SHOWERS. WAVES SUBSIDING TO 2 TO 4 FEET.
.THURSDAY NIGHT...WEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS AFTER MIDNIGHT. A CHANCE OF SNOW SHOWERS. WAVES
SUBSIDING TO 1 TO 3 FEET.
.FRIDAY...WEST WINDS 10 TO 20 KNOTS. A CHANCE OF SNOW SHOWERS.
WAVES 1 TO 3 FEET.
.FRIDAY NIGHT...NORTHWEST WINDS 5 TO 15 KNOTS VEERING NORTH AFTER
MIDNIGHT. A CHANCE OF RAIN AND SNOW SHOWERS. WAVES SUBSIDING TO
CALM TO 2 FEET.
.SATURDAY...NORTH WINDS 5 TO 15 KNOTS BECOMING EAST 10 TO
20 KNOTS. WAVES BUILDING TO 1 TO 3 FEET.
.SUNDAY...EAST WINDS 10 TO 20 KNOTS BECOMING NORTHEAST 20 TO
30 KNOTS. A CHANCE OF SNOW SHOWERS. A CHANCE OF RAIN SHOWERS.
SNOW SHOWERS. WAVES BUILDING TO 2 TO 4 FEET...THEN SUBSIDING TO
1 TO 3 FEET.

$$

LSZ265-260415-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
409 PM EDT TUE APR 25 2017

.LATE THIS AFTERNOON...EAST WINDS 10 TO 20 KNOTS. WAVES 2 TO
4 FEET SUBSIDING TO 1 TO 3 FEET.
.TONIGHT...NORTHEAST WINDS 5 TO 15 KNOTS INCREASING TO 15 TO
25 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN SHOWERS THROUGH
MIDNIGHT...THEN RAIN SHOWERS AFTER MIDNIGHT. WAVES BUILDING TO
5 TO 8 FEET OCCASIONALLY TO 10 FEET.
.WEDNESDAY...EAST WINDS 20 TO 30 KNOTS. RAIN SHOWERS. WAVES
BUILDING TO 8 TO 11 FEET OCCASIONALLY TO 14 FEET...THEN SUBSIDING
TO 6 TO 9 FEET OCCASIONALLY TO 11 FEET.
.WEDNESDAY NIGHT...NORTHWEST WINDS 15 TO 25 KNOTS. RAIN SHOWERS
LIKELY. WAVES SUBSIDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
.THURSDAY...NORTHWEST WINDS 15 TO 25 KNOTS BACKING WEST BY MID
AFTERNOON. A CHANCE OF RAIN SHOWERS. A SLIGHT CHANCE OF SNOW
SHOWERS BY MID AFTERNOON. WAVES SUBSIDING TO 2 TO 4 FEET.
.THURSDAY NIGHT...WEST WINDS 15 TO 25 KNOTS. A CHANCE OF RAIN
SHOWERS. WAVES SUBSIDING TO 1 TO 3 FEET.
.FRIDAY...WEST WINDS 15 TO 25 KNOTS. WAVES SUBSIDING TO CALM TO
2 FEET.
.FRIDAY NIGHT...NORTHWEST WINDS 10 TO 20 KNOTS. WAVES CALM TO
2 FEET.
.SATURDAY...NORTH WINDS 10 TO 20 KNOTS VEERING NORTHEAST. WAVES
BUILDING TO 1 TO 3 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 4 TO 7 FEET
OCCASIONALLY TO 9 FEET.

$$

LSZ266-260415-
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-
409 PM EDT TUE APR 25 2017

.LATE THIS AFTERNOON...SOUTHEAST WINDS 10 TO 20 KNOTS. WAVES 3 TO
5 FEET OCCASIONALLY TO 7 FEET.
.TONIGHT...SOUTHEAST WINDS 20 TO 30 KNOTS BACKING EAST AFTER
MIDNIGHT. A CHANCE OF RAIN SHOWERS THROUGH MIDNIGHT...THEN RAIN
SHOWERS AFTER MIDNIGHT. WAVES SUBSIDING TO 2 TO 4 FEET...THEN
BUILDING TO 7 TO 10 FEET OCCASIONALLY TO 13 FEET.
.WEDNESDAY...EAST WINDS 20 TO 30 KNOTS. RAIN SHOWERS. WAVES
BUILDING TO 10 TO 14 FEET OCCASIONALLY TO 18 FEET...THEN SUBSIDING
TO 8 TO 11 FEET OCCASIONALLY TO 14 FEET.
.WEDNESDAY NIGHT...SOUTH WINDS 15 TO 25 KNOTS VEERING NORTHWEST
AFTER MIDNIGHT. RAIN SHOWERS LIKELY. WAVES SUBSIDING TO 3 TO
6 FEET OCCASIONALLY TO 8 FEET.
.THURSDAY...NORTHWEST WINDS 10 TO 20 KNOTS BECOMING WEST 15 TO
25 KNOTS BY MID AFTERNOON. RAIN SHOWERS LIKELY THROUGH EARLY
AFTERNOON...THEN A CHANCE OF RAIN SHOWERS...POSSIBLY MIXED WITH
SNOW BY MID AFTERNOON. WAVES SUBSIDING TO 2 TO 4 FEET.
.THURSDAY NIGHT...WEST WINDS 15 TO 25 KNOTS. A CHANCE OF SNOW
SHOWERS...POSSIBLY MIXED WITH RAIN. WAVES BUILDING TO 3 TO 5 FEET
OCCASIONALLY TO 7 FEET...THEN SUBSIDING TO 2 TO 4 FEET.
.FRIDAY...WEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO 20 KNOTS
BY MID AFTERNOON. A CHANCE OF FREEZING RAIN THROUGH EARLY
AFTERNOON. A CHANCE OF SNOW SHOWERS. WAVES 2 TO 4 FEET.
.FRIDAY NIGHT...NORTHWEST WINDS 15 TO 25 KNOTS BECOMING NORTH
10 TO 20 KNOTS AFTER MIDNIGHT. A CHANCE OF SNOW SHOWERS...
POSSIBLY MIXED WITH RAIN. WAVES SUBSIDING TO CALM TO 2 FEET.
.SATURDAY...NORTH WINDS 10 TO 20 KNOTS VEERING NORTHEAST. WAVES
BUILDING TO 1 TO 3 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 4 TO 7 FEET
OCCASIONALLY TO 9 FEET.

$$

LSZ267-260415-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
409 PM EDT TUE APR 25 2017

.LATE THIS AFTERNOON...SOUTHEAST WINDS 15 TO 25 KNOTS. WAVES 3 TO
5 FEET OCCASIONALLY TO 7 FEET.
.TONIGHT...SOUTHEAST WINDS 15 TO 25 KNOTS BACKING EAST AFTER
MIDNIGHT. A CHANCE OF RAIN SHOWERS THROUGH MIDNIGHT...THEN RAIN
SHOWERS LIKELY AFTER MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET...
THEN BUILDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.
.WEDNESDAY...EAST WINDS 15 TO 25 KNOTS BECOMING SOUTHEAST 20 TO
30 KNOTS BY MID AFTERNOON. RAIN SHOWERS LIKELY. WAVES BUILDING TO
4 TO 7 FEET OCCASIONALLY TO 9 FEET...THEN SUBSIDING TO 3 TO
5 FEET OCCASIONALLY TO 7 FEET.
.WEDNESDAY NIGHT...SOUTHEAST WINDS 15 TO 25 KNOTS VEERING SOUTH
AFTER MIDNIGHT. RAIN SHOWERS. WAVES SUBSIDING TO CALM TO 2 FEET.
.THURSDAY...SOUTHWEST WINDS 10 TO 20 KNOTS BECOMING WEST 15 TO
25 KNOTS BY MID AFTERNOON. RAIN SHOWERS LIKELY THROUGH EARLY
AFTERNOON...THEN A CHANCE OF RAIN SHOWERS BY MID AFTERNOON. WAVES
BUILDING TO 2 TO 4 FEET.
.THURSDAY NIGHT...WEST WINDS 15 TO 25 KNOTS BACKING SOUTHWEST
AFTER MIDNIGHT. A CHANCE OF RAIN SHOWERS. WAVES 2 TO 4 FEET.
.FRIDAY...WEST WINDS 15 TO 25 KNOTS. WAVES 2 TO 4 FEET.
.FRIDAY NIGHT...NORTHWEST WINDS 15 TO 25 KNOTS BECOMING NORTH
10 TO 20 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.SATURDAY...NORTHWEST WINDS 10 TO 20 KNOTS BECOMING EAST 15 TO
25 KNOTS. WAVES BUILDING TO 1 TO 3 FEET.
.SUNDAY...EAST WINDS 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 5 FEET OCCASIONALLY TO 7 FEET.

$$

LSZ261-260415-
MAFOR 2521/
SUPERIOR WEST...GALE WARNING IN EFFECT...11130 11146 13156 12166
11156. CHANCE OF RAIN SHOWERS THROUGH EARLY EVENING. CHANCE OF
LIGHT FREEZING RAIN LATE TONIGHT THROUGH MID MORNING WEDNESDAY.
WAVES 2 TO 3 FEET BUILDING TO 7 TO 10 FEET TONIGHT. WAVES 10 TO 15
FEET WEDNESDAY.

SUPERIOR NORTH CENTRAL...GALE WARNING IN EFFECT...11120 11140
11146 14156 11156. CHANCE OF RAIN SHOWERS THIS EVENING. CHANCE OF
LIGHT FREEZING RAIN LATE TONIGHT AND WEDNESDAY. WAVES 3 TO 6 FEET
BUILDING TO 8 TO 11 FEET TONIGHT. WAVES 10 TO 14 FEET WEDNESDAY.

SUPERIOR SOUTH CENTRAL 12310 11210 11126 11136 11236 12246.
CHANCE OF RAIN SHOWERS TONIGHT. WAVES 2 TO 4 FEET BUILDING TO 3
TO 5 FEET TONIGHT. WAVES 5 TO 8 FEET BUILDING TO 7 TO 11 FEET
WEDNESDAY.

SUPERIOR EAST 11320 11330 11320 11236 11146 13246. CHANCE OF RAIN
SHOWERS TONIGHT. WAVES 3 TO 5 FEET SUBSIDING TO 2 TO 4 FEET...
THEN BUILDING TO 3 TO 5 FEET TONIGHT. WAVES 5 TO 9 FEET
WEDNESDAY.

$$

VOSS

EXPERIMENTAL MODERNIZED OPEN LAKE FORECAST IS AVAILABLE ONLINE AT
WEATHER.GOV/MQT/GLFTABLE

GRAPHICAL MARINE FORECASTS ARE AVAILABLE ONLINE AT:
WEATHER.GOV/GREATLAKES


USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.