Great Lakes Forecast
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FZUS63 KMQT 210201
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
1001 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 NORTHERN LOWER MICHIGAN 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.

LSZ162-211015-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
1001 PM EDT THU APR 20 2017 /901 PM CDT THU APR 20 2017/

.REST OF TONIGHT...NORTH WINDS 15 TO 25 KNOTS BECOMING NORTHWEST
10 TO 20 KNOTS AFTER MIDNIGHT. SCATTERED RAIN AND SNOW
SHOWERS...ENDING AFTER MIDNIGHT. WAVES 4 TO 7 FEET OCCASIONALLY
TO 9 FEET SUBSIDING TO 2 TO 4 FEET.
.FRIDAY...NORTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST IN THE
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.

$$

LSZ263-211015-
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 THU APR 20 2017

.REST OF TONIGHT...NORTH WINDS 20 TO 30 KNOTS DIMINISHING TO
10 TO 20 KNOTS. NUMEROUS RAIN SHOWERS...POSSIBLY MIXED WITH SNOW
THROUGH MIDNIGHT...GRADUALLY ENDING OVERNIGHT. WAVES 4 TO 8 FEET
OCCASIONALLY TO 10 FEET SUBSIDING TO 2 TO 4 FEET.
.FRIDAY...NORTH WINDS 5 TO 15 KNOTS BACKING NORTHWEST IN THE
AFTERNOON...THEN BACKING SOUTHWEST LATE. 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 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.

$$

LSZ264-211015-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
1001 PM EDT THU APR 20 2017

.REST OF TONIGHT...NORTHEAST WINDS 20 TO 30 KNOTS BECOMING NORTH
15 TO 25 KNOTS AFTER MIDNIGHT. NUMEROUS RAIN AND SNOW SHOWERS
THROUGH MIDNIGHT...THEN SCATTERED RAIN AND SNOW SHOWERS. WAVES 5
TO 8 FEET OCCASIONALLY TO 10 FEET SUBSIDING TO 3 TO 6 FEET
OCCASIONALLY TO 8 FEET.
.FRIDAY...NORTH WINDS 10 TO 20 KNOTS BECOMING WEST 5 TO 15 KNOTS
LATE. WAVES SUBSIDING TO CALM TO 2 FEET.
.FRIDAY NIGHT...WEST 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. 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...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.

$$

LSZ265-211015-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
1001 PM EDT THU APR 20 2017

.REST OF TONIGHT...NORTHEAST WINDS 20 TO 30 KNOTS BACKING NORTH
AFTER MIDNIGHT. NUMEROUS RAIN AND SNOW SHOWERS THROUGH
MIDNIGHT...THEN SCATTERED RAIN AND SNOW SHOWERS. WAVES 6 TO 9
FEET OCCASIONALLY TO 11 FEET SUBSIDING TO 4 TO 7 FEET OCCASIONALLY
TO 9 FEET.
.FRIDAY...NORTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS IN THE AFTERNOON...THEN BECOMING NORTHWEST 5 TO 15 KNOTS
LATE. ISOLATED RAIN SHOWERS EARLY. WAVES SUBSIDING TO 1 TO 3
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.

$$

LSZ266-211015-
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 THU APR 20 2017

.REST OF TONIGHT...NORTHEAST WINDS 20 TO 30 KNOTS BACKING NORTH
LATE. NUMEROUS RAIN AND SNOW SHOWERS THROUGH MIDNIGHT...THEN
SCATTERED RAIN AND SNOW SHOWERS. WAVES 6 TO 9 FEET OCCASIONALLY
TO 11 FEET SUBSIDING TO 4 TO 7 FEET OCCASIONALLY TO 9 FEET.
.FRIDAY...NORTH WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS IN THE AFTERNOON...THEN BACKING NORTHWEST LATE. ISOLATED
RAIN SHOWERS EARLY. 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...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.

$$

LSZ267-211015-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
1001 PM EDT THU APR 20 2017

.REST OF TONIGHT...NORTHEAST WINDS 20 TO 30 KNOTS BECOMING NORTH
15 TO 25 KNOTS LATE. RAIN SHOWERS...POSSIBLY MIXED WITH SNOW
THROUGH MIDNIGHT...THEN SCATTERED RAIN SHOWERS...POSSIBLY MIXED
WITH SNOW. WAVES 4 TO 7 FEET OCCASIONALLY TO 9 FEET SUBSIDING TO 3
TO 6 FEET OCCASIONALLY TO 8 FEET.
.FRIDAY...NORTH WINDS 20 TO 30 KNOTS BECOMING NORTHWEST 15 TO
25 KNOTS LATE. ISOLATED RAIN AND SNOW SHOWERS THROUGH NOON. WAVES
SUBSIDING TO 2 TO 4 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 RAIN AND SNOW SHOWERS...THEN SNOW SHOWERS
LIKELY AND A CHANCE OF RAIN SHOWERS. 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...THEN A CHANCE
OF SNOW SHOWERS. WAVES SUBSIDING TO 2 TO 4 FEET...THEN BUILDING
TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.

$$
LSZ261-211015-
MAFOR 2103/
SUPERIOR WEST 11830 11720 12710 11700 13500. SCATTERED RAIN AND
SNOW SHOWERS LATE THIS EVENING. WAVES 3 TO 7 FEET OVERNIGHT
SUBSIDING TO 1 TO 4 FEET FRIDAY AND FRIDAY EVENING.

SUPERIOR NORTH CENTRAL 11147 12830 12820 11710 12610. SCATTERED
RAIN AND SNOW SHOWERS LATE OVERNIGHT. WAVES 4 TO 9 FEET OVERNIGHT
SUBSIDING TO 1 TO 3 FEET FRIDAY AND FRIDAY EVENING.

SUPERIOR SOUTH CENTRAL 11147 14830 13720. SCATTERED RAIN AND SNOW
SHOWERS LATE TONIGHT AND EARLY FRIDAY MORNING. WAVES 5 TO 9 FEET
OVERNIGHT SUBSIDING TO 2 TO 5 FEET FRIDAY AND FRIDAY EVENING.

SUPERIOR EAST 11147 11130 13830 13720. SCATTERED RAIN AND SNOW
SHOWERS LATE TONIGHT THROUGH MID MORNING FRIDAY. WAVES 5 TO 8
FEET OVERNIGHT SUBSIDING TO 2 TO 6 FEET FRIDAY AND FRIDAY
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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