Great Lakes Forecast
Issued by NWS

Home | Current Version | Previous Version | Graphics & Text | Print | Product List | Glossary On
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
000
FZUS63 KMQT 192001
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
401 PM EDT WED APR 19 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 30.2 INCH RIDGE OVER THE UPPER GREAT LAKES WILL
SHIFT OVER QUEBEC ON THURSDAY AS A 29.7 INCH LOW PRESSURE MOVES
FROM THE CENTRAL PLAINS TO NORTHERN LAKE MICHIGAN BY LATE THURSDAY
AFTERNOON. THE LOW WILL TRACK ACROSS SOUTHERN QUEBEC ON FRIDAY
EVENING WHILE A 30.3 INCH RIDGE MOVES OVER THE NORTHERN GREAT
LAKES. THE RIDGE WILL LINGER OVER THE NORTHERN GREAT LAKES THROUGH
SATURDAY. A WEAK 30.0 INCH TROUGH QUICKLY MOVES SOUTH ACROSS LAKE
SUPERIOR SUNDAY MORNING...FOLLOWED BY A 30.2 INCH RIDGE OVER THE
UPPER GREAT LAKES BY SUNDAY AFTERNOON. THE RIDGE DEPARTS TO THE
EAST ON MONDAY AS A 29.4 INCH LOW PRESSURE SYSTEM LIFTS NORTHEAST
ACROSS THE NORTHERN PLAINS. THE LOW IS EXPECTED TO REACH THE UPPER
GREAT LAKES ON TUESDAY MORNING.


LSZ162-200415-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
401 PM EDT WED APR 19 2017 /301 PM CDT WED APR 19 2017/

...GALE WARNING IN EFFECT FROM THURSDAY MORNING THROUGH THURSDAY
AFTERNOON...

.LATE THIS AFTERNOON...NORTHEAST WINDS 10 TO 20 KNOTS VEERING EAST.
WAVES 1 TO 3 FEET.
.TONIGHT...EAST WINDS 15 TO 25 KNOTS INCREASING TO GALES TO
35 KNOTS LATE. A CHANCE OF RAIN THROUGH MIDNIGHT...THEN RAIN...
POSSIBLY MIXED WITH SNOW. WAVES BUILDING TO 5 TO 8 FEET
OCCASIONALLY TO 10 FEET.
.THURSDAY...NORTHEAST GALES TO 40 KNOTS DIMINISHING TO 20 TO
30 KNOTS LATE. RAIN AND SNOW. WAVES BUILDING TO 8 TO 11 FEET
OCCASIONALLY TO 14 FEET...THEN SUBSIDING TO 5 TO 8 FEET
OCCASIONALLY TO 10 FEET.
.THURSDAY NIGHT...NORTH WINDS 10 TO 20 KNOTS. A CHANCE OF DRIZZLE
AND SNOW THROUGH MIDNIGHT. WAVES SUBSIDING TO 2 TO 4 FEET.
.FRIDAY...NORTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST BY MID
AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.FRIDAY NIGHT...SOUTHWEST WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
.SATURDAY...SOUTHWEST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS BY MID AFTERNOON. WAVES CALM TO 2 FEET.
.SATURDAY NIGHT...WEST WINDS 10 TO 20 KNOTS VEERING NORTHEAST
AFTER MIDNIGHT. A CHANCE OF RAIN SHOWERS. A CHANCE OF SNOW
SHOWERS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.SUNDAY...EAST WINDS 10 TO 20 KNOTS. A CHANCE OF SNOW SHOWERS.
WAVES BUILDING TO 2 TO 4 FEET.
.MONDAY...EAST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO 25 KNOTS.
A CHANCE OF RAIN AND SNOW SHOWERS...THEN RAIN SHOWERS...POSSIBLY
MIXED WITH SNOW. WAVES BUILDING TO 3 TO 6 FEET OCCASIONALLY TO
8 FEET.

$$

LSZ263-200415-
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-
401 PM EDT WED APR 19 2017

...GALE WARNING IN EFFECT FROM THURSDAY MORNING THROUGH THURSDAY
AFTERNOON...

.LATE THIS AFTERNOON...NORTHEAST WINDS 10 TO 20 KNOTS. WAVES 1 TO
3 FEET.
.TONIGHT...EAST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO 30 KNOTS
AFTER MIDNIGHT. A CHANCE OF RAIN THROUGH MIDNIGHT...THEN RAIN.
WAVES BUILDING TO 5 TO 8 FEET OCCASIONALLY TO 10 FEET.
.THURSDAY...EAST GALES TO 35 KNOTS BACKING NORTHEAST IN THE
AFTERNOON. RAIN AND SNOW. WAVES BUILDING TO 6 TO 10 FEET
OCCASIONALLY TO 13 FEET.
.THURSDAY NIGHT...NORTH WINDS 20 TO 30 KNOTS DIMINISHING TO 10 TO
20 KNOTS THROUGH THE NIGHT. DRIZZLE AND SNOW LIKELY THROUGH
MIDNIGHT...THEN A SLIGHT CHANCE OF DRIZZLE AND SNOW. WAVES
SUBSIDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
.FRIDAY...NORTH WINDS 10 TO 20 KNOTS BECOMING WEST 5 TO 15 KNOTS
BY MID AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.FRIDAY NIGHT...WEST WINDS LESS THAN 10 KNOTS BACKING SOUTHWEST
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.SATURDAY...SOUTHWEST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
.SATURDAY NIGHT...WEST WINDS 5 TO 15 KNOTS BECOMING NORTHEAST
10 TO 20 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN SHOWERS. A CHANCE
OF SNOW SHOWERS AFTER MIDNIGHT. WAVES BUILDING TO 1 TO 3 FEET...
THEN SUBSIDING TO CALM TO 2 FEET.
.SUNDAY...NORTHEAST WINDS 10 TO 20 KNOTS BECOMING EAST 5 TO
15 KNOTS. WAVES BUILDING TO 2 TO 4 FEET...THEN SUBSIDING TO 1 TO
3 FEET.
.MONDAY...SOUTHEAST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS. A CHANCE OF RAIN AND SNOW SHOWERS...THEN RAIN SHOWERS...
POSSIBLY MIXED WITH SNOW. WAVES BUILDING TO 5 TO 8 FEET
OCCASIONALLY TO 10 FEET.

$$

LSZ264-200415-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
401 PM EDT WED APR 19 2017

...GALE WARNING IN EFFECT FROM THURSDAY MORNING THROUGH THURSDAY
AFTERNOON...

.LATE THIS AFTERNOON...NORTHEAST WINDS 5 TO 15 KNOTS. WAVES CALM
TO 2 FEET.
.TONIGHT...EAST WINDS 5 TO 15 KNOTS INCREASING TO 20 TO 30 KNOTS
AFTER MIDNIGHT. A SLIGHT CHANCE OF RAIN THROUGH MIDNIGHT...THEN
RAIN...POSSIBLY MIXED WITH SNOW. WAVES BUILDING TO 4 TO 7 FEET
OCCASIONALLY TO 9 FEET.
.THURSDAY...EAST GALES TO 35 KNOTS BACKING NORTHEAST IN THE
AFTERNOON. RAIN AND SNOW. WAVES BUILDING TO 7 TO 10 FEET
OCCASIONALLY TO 13 FEET.
.THURSDAY NIGHT...NORTHEAST WINDS 20 TO 30 KNOTS BACKING NORTH
AFTER MIDNIGHT. DRIZZLE AND SNOW LIKELY THROUGH MIDNIGHT...THEN A
CHANCE OF DRIZZLE AND SNOW. WAVES SUBSIDING TO 4 TO 7 FEET
OCCASIONALLY TO 9 FEET.
.FRIDAY...NORTH WINDS 15 TO 25 KNOTS BECOMING NORTHWEST 10 TO
20 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO 1 TO 3 FEET.
.FRIDAY NIGHT...NORTHWEST WINDS 5 TO 15 KNOTS BECOMING WEST LESS
THAN 10 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.SATURDAY...SOUTHWEST WINDS 5 TO 15 KNOTS. WAVES BUILDING TO 1 TO
3 FEET.
.SATURDAY NIGHT...WEST WINDS 10 TO 20 KNOTS VEERING NORTH AFTER
MIDNIGHT. A CHANCE OF RAIN SHOWERS. A CHANCE OF SNOW SHOWERS
AFTER MIDNIGHT. WAVES BUILDING TO 2 TO 4 FEET.
.SUNDAY...NORTHEAST WINDS 10 TO 20 KNOTS BECOMING EAST 5 TO
15 KNOTS. WAVES SUBSIDING TO 1 TO 3 FEET.
.MONDAY...SOUTHEAST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS. A CHANCE OF SNOW SHOWERS...POSSIBLY MIXED WITH RAIN...
THEN RAIN SHOWERS...POSSIBLY MIXED WITH SNOW. WAVES BUILDING TO
5 TO 8 FEET OCCASIONALLY TO 10 FEET.

$$

LSZ265-200415-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
401 PM EDT WED APR 19 2017

...GALE WARNING IN EFFECT FROM THURSDAY MORNING THROUGH THURSDAY
AFTERNOON...

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

$$

LSZ266-200415-
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-
401 PM EDT WED APR 19 2017

...GALE WARNING IN EFFECT FROM THURSDAY MORNING THROUGH THURSDAY
AFTERNOON...

.LATE THIS AFTERNOON...NORTH WINDS 10 TO 20 KNOTS. WAVES 2 TO
4 FEET SUBSIDING TO 1 TO 3 FEET.
.TONIGHT...NORTHEAST WINDS 10 TO 20 KNOTS BECOMING EAST 15 TO
25 KNOTS AFTER MIDNIGHT...THEN INCREASING TO 20 TO 30 KNOTS LATE.
A CHANCE OF RAIN THROUGH MIDNIGHT...THEN RAIN...POSSIBLY MIXED
WITH SNOW. WAVES BUILDING TO 4 TO 7 FEET OCCASIONALLY TO 9 FEET.
.THURSDAY...EAST GALES TO 35 KNOTS BACKING NORTHEAST LATE. RAIN
AND SNOW. WAVES BUILDING TO 8 TO 11 FEET OCCASIONALLY TO
14 FEET...THEN SUBSIDING TO 6 TO 9 FEET OCCASIONALLY TO 11 FEET.
.THURSDAY NIGHT...NORTHEAST WINDS 20 TO 30 KNOTS BACKING NORTH
AFTER MIDNIGHT...THEN INCREASING TO GALES TO 35 KNOTS LATE.
DRIZZLE AND A CHANCE OF SNOW. WAVES SUBSIDING TO 5 TO 8 FEET
OCCASIONALLY TO 10 FEET.
.FRIDAY...NORTH WINDS 20 TO 30 KNOTS BECOMING NORTHWEST 15 TO
25 KNOTS BY MID AFTERNOON. A SLIGHT CHANCE OF DRIZZLE AND SNOW
THROUGH EARLY AFTERNOON. 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.
.SATURDAY...SOUTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTH BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
.SATURDAY NIGHT...WEST WINDS 10 TO 20 KNOTS BECOMING NORTH 15 TO
25 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN SHOWERS. A CHANCE OF
SNOW SHOWERS AFTER MIDNIGHT. WAVES BUILDING TO 2 TO 4 FEET.
.SUNDAY...NORTH WINDS 15 TO 25 KNOTS BECOMING EAST 10 TO
20 KNOTS. WAVES BUILDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET...
THEN SUBSIDING TO CALM TO 2 FEET.
.MONDAY...SOUTHEAST WINDS 15 TO 25 KNOTS. RAIN SHOWERS...POSSIBLY
MIXED WITH SNOW. WAVES BUILDING TO 5 TO 8 FEET OCCASIONALLY TO 10
FEET.

$$

LSZ267-200415-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
401 PM EDT WED APR 19 2017

...GALE WARNING IN EFFECT FROM THURSDAY MORNING THROUGH THURSDAY
AFTERNOON...

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

$$

LSZ261-200415-
MAFOR 1921/
SUPERIOR WEST...GALE WARNING IN EFFECT...11220 11230 11240 11246
11256 13157. WAVES 1 TO 2 FEET BUILDING TO 4 TO 7 FEET TONIGHT.
WAVES BUILDING TO 7 TO 11 FEET THURSDAY.

SUPERIOR NORTH CENTRAL...GALE WARNING IN EFFECT...11100 11210
11230 11240 12247 12157. CHANCE OF RAIN AFTER MIDNIGHT. CHANCE OF
RAIN AND SNOW LATE TONIGHT. WAVES 1 TO 3 FEET BUILDING TO 3 TO 6
FEET TONIGHT. WAVES BUILDING TO 6 TO 10 FEET THURSDAY.

SUPERIOR SOUTH CENTRAL...GALE WARNING IN EFFECT...11110 11120
11230 11246 11247 11257 11256 11257. CHANCE OF RAIN AFTER
MIDNIGHT TONIGHT. CHANCE OF SNOW EARLY THURSDAY AFTERNOON. WAVES
2 TO 6 FEET TONIGHT BUILDING TO 8 TO 11 FEET THURSDAY.

SUPERIOR EAST...GALE WARNING IN EFFECT...11810 11120 11130 11230
11247 11257 11256 11257. CHANCE OF RAIN AFTER MIDNIGHT TONIGHT.
CHANCE OF SNOW EARLY THURSDAY AFTERNOON. WAVES 2 TO 5 FEET
TONIGHT BUILDING TO 5 TO 9 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



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