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

000
FZUS63 KMQT 201956
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
356 PM EDT THU APR 20 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 29.7 INCH LOW OVER NORTHEAST WISCONSIN WILL REACH
NORTHERN LAKE MICHIGAN THIS EVENING. THE LOW WILL TRACK ACROSS
SOUTHERN QUEBEC FRIDAY EVENING WHILE A 30.3 INCH RIDGE MOVES OVER
THE NORTHERN GREAT LAKES. A 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.

LSZ162-210400-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
356 PM EDT THU APR 20 2017 /256 PM CDT THU APR 20 2017/

...GALE WARNING IN EFFECT UNTIL 5 PM EDT /4 PM CDT/ THIS
AFTERNOON...

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

$$

LSZ263-210400-
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-
356 PM EDT THU APR 20 2017

...GALE WARNING IN EFFECT UNTIL 5 PM EDT THIS AFTERNOON...

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

$$

LSZ264-210400-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
356 PM EDT THU APR 20 2017

...GALE WARNING IN EFFECT UNTIL 5 PM EDT THIS AFTERNOON...

.LATE THIS AFTERNOON...NORTHEAST GALES TO 35 KNOTS DIMINISHING TO
NORTHEAST WINDS TO 30 KNOTS. RAIN SHOWERS AND SNOW SHOWERS. WAVES
6 TO 10 FEET OCCASIONALLY TO 13 FEET.
.TONIGHT...NORTHEAST WINDS 20 TO 30 KNOTS BECOMING NORTH. RAIN
SHOWERS AND SNOW SHOWERS THROUGH MIDNIGHT...THEN A CHANCE OF RAIN
AND SNOW SHOWERS AFTER MIDNIGHT. 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...WEST WINDS 5 TO 15 KNOTS. WAVES SUBSIDING TO CALM
TO 2 FEET.
.SATURDAY...SOUTHWEST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS BY MID AFTERNOON. A SLIGHT CHANCE OF DRIZZLE BY MID
AFTERNOON. 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...NORTH WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO 15 KNOTS
BY MID AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.SUNDAY NIGHT...SOUTHEAST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.MONDAY...SOUTHEAST WINDS 15 TO 25 KNOTS. A CHANCE OF RAIN AND
SNOW SHOWERS...THEN RAIN SHOWERS LIKELY. WAVES BUILDING TO 4 TO
7 FEET OCCASIONALLY TO 9 FEET...THEN SUBSIDING TO 3 TO 6 FEET
OCCASIONALLY TO 8 FEET.
.TUESDAY...NORTH WINDS 15 TO 25 KNOTS. SNOW SHOWERS...POSSIBLY
MIXED WITH RAIN SHOWERS...THEN A CHANCE OF SNOW SHOWERS. WAVES
BUILDING TO 6 TO 9 FEET OCCASIONALLY TO 11 FEET...THEN SUBSIDING
TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.

$$

LSZ265-210400-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
356 PM EDT THU APR 20 2017

...GALE WARNING IN EFFECT UNTIL 5 PM EDT THIS AFTERNOON...

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

$$

LSZ266-210400-
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-
356 PM EDT THU APR 20 2017

...GALE WARNING IN EFFECT UNTIL 6 PM EDT THIS EVENING...

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

$$

LSZ267-210400-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
356 PM EDT THU APR 20 2017

...GALE WARNING IN EFFECT UNTIL 6 PM EDT THIS EVENING...

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

$$

LSZ261-210400-
MAFOR 2021/
SUPERIOR WEST 11147 11837 11830 11730 11720 12710 11500. CHANCE
OF RAIN AND SNOW SHOWERS LATE THIS EVENING. CHANCE OF SNOW
SHOWERS AFTER MIDNIGHT TONIGHT. WAVES 6 TO 10 FEET SUBSIDING TO 3
TO 5 FEET TONIGHT. WAVES 2 TO 4 FEET FRIDAY.

SUPERIOR NORTH CENTRAL 13147 12840 12830 11720. CHANCE OF RAIN
AND SNOW SHOWERS LATE TONIGHT. WAVES 6 TO 10 FEET SUBSIDING TO 5
TO 8 FEET TONIGHT. WAVES 4 TO 7 FEET SUBSIDING TO 2 TO 3 FEET
FRIDAY.

SUPERIOR SOUTH CENTRAL...GALE WARNING IN EFFECT...11156 11147
11847 12840 12840 11730. CHANCE OF SNOW SHOWERS EARLY THIS
EVENING. CHANCE OF SNOW AND RAIN SHOWERS LATE TONIGHT. CHANCE OF
SNOW SHOWERS THROUGH MID MORNING FRIDAY. WAVES 6 TO 10 FEET
TONIGHT. WAVES 5 TO 8 FEET SUBSIDING TO 3 TO 5 FEET FRIDAY.

SUPERIOR EAST...GALE WARNING IN EFFECT...11157 12147 12840 12840
11740. CHANCE OF RAIN AND SNOW SHOWERS LATE TONIGHT. CHANCE OF
RAIN AND SNOW SHOWERS THROUGH MID MORNING FRIDAY. WAVES 5 TO 9
FEET TONIGHT. WAVES 4 TO 7 FEET FRIDAY.

$$

BEACHLER

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.