Great Lakes Forecast
Issued by NWS

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527
FZUS63 KMQT 240201
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
1001 PM EDT SAT APR 23 2016

FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE SUPERIOR

.SYNOPSIS...A 30.1 INCH RIDGE OF HIGH PRESSURE OVER THE LOWER GREAT
LAKES WILL MOVE EAST AS A 29.4 INCH LOW PRESSURE DEVELOPING OVER THE
NORTHERN PLAINS MOVES INTO THE UPPER MISSISSIPPI VALLEY ON MONDAY.
A 30.4 INCH HIGH PRESSURE RIDGE OVER CENTRAL CANADA SHIFTS SOUTHEAST
INTO FAR NORTHWEST ONTARIO ON MONDAY AND THEN PUSHES INTO THE GREAT
LAKES REGION ON TUESDAY AS THE LOW MOVES EAST. THIS RIDGE AXIS WILL
HOLD OVER THE GREAT LAKE THROUGH WEDNESDAY WHILE A 29.4 INCH LOW
PRESSURE DEVELOPS OVER THE CENTRAL PLAINS. THE LOW WILL FILL TO 29.7
INCHES AS IT SLIDES TO THE OHIO RIVER VALLEY...WITH THE RIDGE
WEAKENING TO 30.1 INCHES THURSDAY.

LSZ162-241015-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
1001 PM EDT SAT APR 23 2016 /901 PM CDT SAT APR 23 2016/

...GALE WARNING IN EFFECT FROM SUNDAY MORNING THROUGH MONDAY
EVENING...

.REST OF TONIGHT...NORTHEAST WINDS 15 TO 25 KNOTS. RAIN LIKELY.
WAVES 2 TO 4 FEET BUILDING TO 3 TO 6 FEET.
.SUNDAY...NORTHEAST WINDS 20 TO 30 KNOTS INCREASING TO GALES TO
35 KNOTS BY NOON. RAIN. WAVES BUILDING TO 7 TO 10 FEET.
.SUNDAY NIGHT...NORTHEAST GALES TO 40 KNOTS. A CHANCE OF RAIN.
WAVES 7 TO 10 FEET.
.MONDAY...NORTHEAST GALES TO 40 KNOTS. A CHANCE OF RAIN. A SLIGHT
CHANCE OF SNOW BY MID AFTERNOON. WAVES SUBSIDING TO 6 TO 9 FEET.
.MONDAY NIGHT...NORTHEAST WINDS 20 TO 30 KNOTS DIMINISHING TO
15 TO 25 KNOTS AFTER MIDNIGHT. OCCASIONAL GALE FORCE GUSTS TO 35
KNOTS IN THE EVENING. WAVES SUBSIDING TO 3 TO 5 FEET.
.TUESDAY...EAST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO 2 TO 4 FEET.
.TUESDAY NIGHT...EAST WINDS 5 TO 15 KNOTS. WAVES SUBSIDING TO
CALM TO 2 FEET.
.WEDNESDAY...EAST WINDS 10 TO 20 KNOTS. WAVES BUILDING TO 3 TO
5 FEET...THEN SUBSIDING TO 1 TO 3 FEET.
.THURSDAY...NORTHEAST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS. WAVES BUILDING TO 2 TO 4 FEET...THEN SUBSIDING TO CALM
TO 2 FEET.

$$

LSZ263-241015-
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 SAT APR 23 2016

.REST OF TONIGHT...NORTHEAST WINDS 10 TO 20 KNOTS VEERING EAST
AFTER MIDNIGHT. RAIN LIKELY. WAVES 1 TO 3 FEET BUILDING TO 2 TO
4 FEET...THEN SUBSIDING TO 1 TO 3 FEET.
.SUNDAY...EAST WINDS 20 TO 30 KNOTS. RAIN LIKELY THROUGH EARLY
AFTERNOON...THEN A CHANCE OF RAIN BY MID AFTERNOON. WAVES
BUILDING TO 5 TO 8 FEET.
.SUNDAY NIGHT...EAST WINDS 20 TO 30 KNOTS. A FEW GALE FORCE GUSTS TO
35 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN. WAVES BUILDING TO 6 TO 9
FEET.
.MONDAY...NORTHEAST WINDS 25 TO 30 KNOTS WITH A FEW GALE FORCE GUSTS
TO 35 KNOTS. A CHANCE OF RAIN. WAVES BUILDING TO 7 TO 10 FEET...THEN
SUBSIDING TO 5 TO 8 FEET.
.MONDAY NIGHT...NORTHEAST WINDS 15 TO 25 KNOTS. WAVES SUBSIDING
TO 3 TO 5 FEET.
.TUESDAY...NORTHEAST WINDS 10 TO 20 KNOTS VEERING EAST BY MID
AFTERNOON. WAVES SUBSIDING TO 2 TO 4 FEET.
.TUESDAY NIGHT...EAST WINDS 5 TO 15 KNOTS. WAVES SUBSIDING TO
CALM TO 2 FEET.
.WEDNESDAY...EAST WINDS 10 TO 20 KNOTS. WAVES BUILDING TO 2 TO
4 FEET...THEN SUBSIDING TO CALM TO 2 FEET.
.THURSDAY...NORTHEAST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS. WAVES BUILDING TO 2 TO 4 FEET...THEN SUBSIDING TO CALM
TO 2 FEET.

$$

LSZ264-241015-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
1001 PM EDT SAT APR 23 2016

.REST OF TONIGHT...SOUTHEAST WINDS 5 TO 15 KNOTS BACKING EAST
AFTER MIDNIGHT. A CHANCE OF RAIN BY LATE EVENING...THEN RAIN
LIKELY...POSSIBLY MIXED WITH SNOW AFTER MIDNIGHT. WAVES CALM TO
2 FEET.
.SUNDAY...EAST WINDS 15 TO 25 KNOTS. A SLIGHT CHANCE OF SNOW
THROUGH EARLY AFTERNOON. A SLIGHT CHANCE OF RAIN. WAVES BUILDING
TO 2 TO 4 FEET.
.SUNDAY NIGHT...EAST WINDS 15 TO 25 KNOTS INCREASING TO 30 KNOTS AFTER
MIDNIGHT. A FEW GALE FORCE GUSTS TO 35 KNOTS AFTER MIDNIGHT. WAVES
BUILDING TO 4 TO 7 FEET.
.MONDAY...NORTHEAST WINDS TO 30 KNOTS DIMINISHING TO 15 TO 25 KNOTS
BY MID AFTERNOON. A FEW GALE FORCE GUSTS TO 35 KNOTS IN THE MORNING.
WAVES BUILDING TO 5 TO 8 FEET...THEN SUBSIDING TO 3 TO 5 FEET.
.MONDAY NIGHT...NORTHEAST WINDS 10 TO 20 KNOTS INCREASING TO
15 TO 25 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET...
THEN BUILDING TO 2 TO 4 FEET.
.TUESDAY...NORTHEAST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.TUESDAY NIGHT...NORTHEAST WINDS 5 TO 15 KNOTS INCREASING TO
10 TO 20 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.WEDNESDAY...EAST WINDS 5 TO 15 KNOTS. WAVES BUILDING TO 1 TO
3 FEET.
.THURSDAY...NORTHEAST WINDS 10 TO 20 KNOTS. WAVES SUBSIDING TO
CALM TO 2 FEET.

$$

LSZ265-241015-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
1001 PM EDT SAT APR 23 2016

.REST OF TONIGHT...EAST WINDS 10 TO 20 KNOTS. A CHANCE OF RAIN BY
LATE EVENING...THEN RAIN LIKELY AFTER MIDNIGHT. WAVES CALM TO
2 FEET.
.SUNDAY...EAST WINDS 15 TO 25 KNOTS. RAIN LIKELY. WAVES BUILDING
TO 2 TO 4 FEET.
.SUNDAY NIGHT...EAST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO
30 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN. WAVES BUILDING TO 3 TO
6 FEET.
.MONDAY...EAST WINDS TO 30 KNOTS BECOMING NORTHEAST 20 TO 30 KNOTS
BY MID AFTERNOON. A FEW GALE FORCE GUSTS TO 35 KNOTS IN THE MORNING. A
SLIGHT CHANCE OF RAIN. WAVES BUILDING TO 5 TO 8 FEET...THEN SUBSIDING
TO 3 TO 5 FEET.
.MONDAY NIGHT...NORTHEAST WINDS 15 TO 25 KNOTS VEERING EAST AFTER
MIDNIGHT. WAVES SUBSIDING TO 2 TO 4 FEET.
.TUESDAY...EAST WINDS 15 TO 25 KNOTS BECOMING NORTHEAST 5 TO
15 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.TUESDAY NIGHT...NORTHEAST WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
.WEDNESDAY...EAST WINDS 5 TO 15 KNOTS. WAVES BUILDING TO 1 TO
3 FEET.
.THURSDAY...EAST WINDS 10 TO 20 KNOTS BACKING NORTHEAST. WAVES
SUBSIDING TO CALM TO 2 FEET...THEN BUILDING TO 1 TO 3 FEET.

$$

LSZ266-241015-
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 SAT APR 23 2016

.REST OF TONIGHT...EAST WINDS 10 TO 20 KNOTS VEERING SOUTHEAST
AFTER MIDNIGHT. A CHANCE OF RAIN BY LATE EVENING...THEN RAIN
LIKELY...POSSIBLY MIXED WITH SNOW AFTER MIDNIGHT. WAVES CALM TO
2 FEET.
.SUNDAY...EAST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO 25 KNOTS
BY MID AFTERNOON. RAIN LIKELY...POSSIBLY MIXED WITH SNOW THROUGH
EARLY AFTERNOON...THEN A SLIGHT CHANCE OF RAIN BY MID AFTERNOON.
WAVES BUILDING TO 2 TO 4 FEET.
.SUNDAY NIGHT...EAST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO
30 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN. WAVES BUILDING TO 3 TO
6 FEET.
.MONDAY...EAST WINDS TO 30 KNOTS BECOMING NORTHEAST 15 TO 25 KNOTS
BY MID AFTERNOON. A FEW GALE FORCE GUSTS TO 35 KNOTS IN THE MORNING. A
SLIGHT CHANCE OF RAIN. WAVES BUILDING TO 5 TO 8 FEET...THEN SUBSIDING
TO 3 TO 5 FEET.
.MONDAY NIGHT...NORTHEAST WINDS 15 TO 25 KNOTS. WAVES SUBSIDING
TO 2 TO 4 FEET.
.TUESDAY...NORTHEAST WINDS 15 TO 25 KNOTS BECOMING NORTH 10 TO
20 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.TUESDAY NIGHT...NORTH WINDS 10 TO 20 KNOTS BECOMING NORTHEAST
5 TO 15 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.WEDNESDAY...NORTHEAST WINDS 5 TO 15 KNOTS. WAVES BUILDING TO
1 TO 3 FEET.
.THURSDAY...NORTHEAST WINDS 10 TO 20 KNOTS. WAVES 1 TO 3 FEET.

$$

LSZ267-241015-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
1001 PM EDT SAT APR 23 2016

.REST OF TONIGHT...SOUTHEAST WINDS 5 TO 15 KNOTS INCREASING TO
10 TO 20 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN. A SLIGHT CHANCE
OF SNOW AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.SUNDAY...EAST WINDS 15 TO 25 KNOTS. RAIN LIKELY...POSSIBLY MIXED
WITH SNOW THROUGH EARLY AFTERNOON...THEN A CHANCE OF RAIN BY MID
AFTERNOON. WAVES BUILDING TO 1 TO 3 FEET.
.SUNDAY NIGHT...EAST WINDS 15 TO 25 KNOTS. A SLIGHT CHANCE OF
RAIN. WAVES BUILDING TO 3 TO 5 FEET.
.MONDAY...EAST WINDS 15 TO 25 KNOTS BECOMING NORTHEAST 10 TO
20 KNOTS BY MID AFTERNOON. A SLIGHT CHANCE OF RAIN. WAVES
SUBSIDING TO 1 TO 3 FEET.
.MONDAY NIGHT...NORTHEAST WINDS 10 TO 20 KNOTS INCREASING TO
15 TO 25 KNOTS AFTER MIDNIGHT. WAVES 1 TO 3 FEET.
.TUESDAY...NORTHEAST WINDS 10 TO 20 KNOTS BACKING NORTH BY MID
AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.TUESDAY NIGHT...NORTH WINDS 10 TO 20 KNOTS VEERING NORTHEAST
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.WEDNESDAY...NORTH WINDS 10 TO 20 KNOTS VEERING NORTHEAST. WAVES
CALM TO 2 FEET.
.THURSDAY...NORTHEAST WINDS 10 TO 20 KNOTS. WAVES CALM TO 2 FEET.

$$
LSZ261-241015-
MAFOR 2403/
SUPERIOR WEST...GALE WARNING IN EFFECT...11136 11126 11136 11146
13156 11150. CHANCE OF RAIN. CHANCE OF RAIN LATE SUNDAY EVENING.
WAVES 2 TO 4 FEET OVERNIGHT. WAVES 3 TO 6 FEET BUILDING TO 5 TO 9
FEET SUNDAY AND SUNDAY EVENING.

SUPERIOR NORTH CENTRAL 11316 11216 12220 14230. CHANCE OF RAIN. CHANCE
OF RAIN AND SLIGHT CHANCE OF SNOW LATE OVERNIGHT THROUGH MID MORNING
SUNDAY. WAVES AROUND 1 FOOT OVERNIGHT. WAVES 1 TO 3 FEET BUILDING TO
2 TO 4 FEET SUNDAY AND SUNDAY EVENING.

SUPERIOR SOUTH CENTRAL 11210 12316 14226 11230. CHANCE OF RAIN.
CHANCE OF RAIN LATE SUNDAY EVENING. WAVES 1 TO 2 FEET OVERNIGHT.
WAVES 1 TO 3 FEET BUILDING TO 2 TO 4 FEET SUNDAY AND SUNDAY EVENING.

SUPERIOR EAST 12300 11316 12226 13220. CHANCE OF RAIN. CHANCE OF
RAIN AND SLIGHT CHANCE OF SNOW LATE OVERNIGHT THROUGH THE MORNING.
CHANCE OF RAIN EARLY SUNDAY AFTERNOON. WAVES 1 FOOT OR LESS
OVERNIGHT. WAVES 1 TO 3 FEET SUNDAY. WAVES 2 TO 4 FEET SUNDAY
EVENING.

$$

RJT



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