Great Lakes Forecast
Issued by NWS

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225
FZUS63 KMQT 241952
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
352 PM EDT FRI MAR 24 2017

FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE SUPERIOR

.SYNOPSIS...A 29.9 INCH TROUGH WILL EXIT ACROSS THE NEW ENGLAND
STATES THIS EVENING. MEANWHILE...A 29.5 INCH LOW WILL MOVE INTO THE
CENTRAL PLAINS AS 30.5 INCH HIGH PRESSURE BUILDS OVER NORTHERN
ONTARIO. THE HIGH WILL BUILD TO 30.6 INCHES OVER JAMES BAY SATURDAY
AFTERNOON AS THE LOW WEAKENS TO 29.7 INCHES OVER WESTERN ILLINOIS.
THE HIGH PRESSURE WILL THEN MOVE TO NEW ENGLAND SATURDAY NIGHT
AND SUNDAY WHILE THE LOW OVER ILLINOIS WEAKENS FURTHER. A 29.7
INCH TROUGH WILL THEN MOVE THROUGH THE LOWER GREAT LAKES MONDAY
NIGHT AND TUESDAY AS A 30.2 INCH RIDGE BUILDS OVER THE WESTERN GREAT
LAKES TUESDAY. THIS RIDGE BUILDS TO 30.4 INCHES OVER THE UPPER GREAT
LAKES ON WEDNESDAY.

LSZ162-250400-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
352 PM EDT FRI MAR 24 2017 /252 PM CDT FRI MAR 24 2017/

.LATE THIS AFTERNOON...NORTHEAST WINDS 10 TO 20 KNOTS. WAVES CALM
TO 2 FEET BUILDING TO 1 TO 3 FEET.
.TONIGHT...EAST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO 30 KNOTS
AFTER MIDNIGHT. WAVES BUILDING TO 3 TO 6 FEET.
.SATURDAY...EAST WINDS 20 TO 30 KNOTS. WAVES BUILDING TO 4 TO
7 FEET.
.SATURDAY NIGHT...EAST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS AFTER MIDNIGHT. A CHANCE OF FREEZING RAIN...POSSIBLY
MIXED WITH RAIN AFTER MIDNIGHT. WAVES SUBSIDING TO 2 TO 4 FEET.
.SUNDAY...NORTHEAST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS BY MID AFTERNOON. A CHANCE OF FREEZING RAIN THROUGH
EARLY AFTERNOON. A CHANCE OF RAIN. WAVES SUBSIDING TO 1 TO
3 FEET.
.SUNDAY NIGHT...NORTHEAST WINDS 5 TO 15 KNOTS BACKING NORTHWEST
AFTER MIDNIGHT. A CHANCE OF RAIN...POSSIBLY MIXED WITH FREEZING
RAIN. WAVES SUBSIDING TO CALM TO 2 FEET.
.MONDAY...NORTHWEST WINDS 5 TO 15 KNOTS BACKING WEST BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
.MONDAY NIGHT...NORTHWEST WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
.TUESDAY...NORTH WINDS 5 TO 15 KNOTS VEERING NORTHEAST. WAVES
CALM TO 2 FEET.
.WEDNESDAY...EAST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS. WAVES CALM TO 2 FEET.

$$

LSZ263-250400-
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-
352 PM EDT FRI MAR 24 2017

.LATE THIS AFTERNOON...NORTHEAST WINDS 10 TO 20 KNOTS. WAVES 1 TO
3 FEET BUILDING TO 2 TO 4 FEET.
.TONIGHT...NORTHEAST WINDS 15 TO 25 KNOTS VEERING EAST AFTER
MIDNIGHT. WAVES BUILDING TO 3 TO 6 FEET.
.SATURDAY...EAST WINDS 15 TO 25 KNOTS. WAVES 3 TO 6 FEET.
.SATURDAY NIGHT...EAST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN. A CHANCE OF FREEZING
RAIN...POSSIBLY MIXED WITH SNOW AFTER MIDNIGHT. WAVES SUBSIDING
TO 2 TO 4 FEET.
.SUNDAY...EAST WINDS 10 TO 20 KNOTS BECOMING NORTHEAST 5 TO
15 KNOTS BY MID AFTERNOON. A CHANCE OF FREEZING RAIN THROUGH
EARLY AFTERNOON. A CHANCE OF RAIN. WAVES SUBSIDING TO 1 TO
3 FEET.
.SUNDAY NIGHT...NORTHEAST WINDS 5 TO 15 KNOTS BACKING NORTH AFTER
MIDNIGHT. A CHANCE OF RAIN. WAVES SUBSIDING TO CALM TO 2 FEET.
.MONDAY...NORTHWEST WINDS 5 TO 15 KNOTS BACKING WEST BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
.MONDAY NIGHT...NORTHWEST WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
.TUESDAY...NORTH WINDS 5 TO 15 KNOTS VEERING NORTHEAST. WAVES
CALM TO 2 FEET.
.WEDNESDAY...EAST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.

$$

LSZ264-250400-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
352 PM EDT FRI MAR 24 2017

.LATE THIS AFTERNOON...NORTHEAST WINDS 15 TO 25 KNOTS. WAVES 1 TO
3 FEET BUILDING TO 2 TO 4 FEET.
.TONIGHT...NORTHEAST WINDS 15 TO 25 KNOTS VEERING EAST AFTER
MIDNIGHT. WAVES BUILDING TO 3 TO 6 FEET.
.SATURDAY...EAST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO 2 TO 4 FEET...THEN
BUILDING TO 3 TO 5 FEET.
.SATURDAY NIGHT...EAST WINDS 15 TO 25 KNOTS VEERING SOUTHEAST
AFTER MIDNIGHT. A CHANCE OF FREEZING RAIN...RAIN AND SNOW AFTER
MIDNIGHT. WAVES SUBSIDING TO 2 TO 4 FEET...THEN BUILDING TO 3 TO
5 FEET.
.SUNDAY...EAST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO 15 KNOTS
BY MID AFTERNOON. A SLIGHT CHANCE OF FREEZING RAIN THROUGH EARLY
AFTERNOON. A CHANCE OF RAIN. WAVES SUBSIDING TO 1 TO 3 FEET.
.SUNDAY NIGHT...NORTHEAST WINDS 5 TO 15 KNOTS BACKING NORTH AFTER
MIDNIGHT. A CHANCE OF RAIN. WAVES SUBSIDING TO CALM TO 2 FEET.
.MONDAY...NORTH WINDS 5 TO 15 KNOTS BACKING NORTHWEST BY MID
AFTERNOON. A CHANCE OF RAIN. WAVES CALM TO 2 FEET.
.MONDAY NIGHT...NORTHWEST WINDS 5 TO 15 KNOTS VEERING NORTH AFTER
MIDNIGHT. WAVES CALM TO 2 FEET.
.TUESDAY...NORTH WINDS 5 TO 15 KNOTS VEERING NORTHEAST. WAVES
CALM TO 2 FEET.
.WEDNESDAY...NORTHEAST WINDS 5 TO 15 KNOTS VEERING EAST. WAVES
CALM TO 2 FEET.

$$

LSZ265-250400-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
352 PM EDT FRI MAR 24 2017

.LATE THIS AFTERNOON...NORTH WINDS 15 TO 25 KNOTS. WAVES 1 TO
3 FEET BUILDING TO 2 TO 4 FEET.
.TONIGHT...NORTHEAST WINDS 20 TO 30 KNOTS VEERING EAST AFTER
MIDNIGHT. WAVES BUILDING TO 3 TO 6 FEET.
.SATURDAY...EAST WINDS 15 TO 25 KNOTS. WAVES 3 TO 5 FEET.
.SATURDAY NIGHT...EAST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS AFTER MIDNIGHT. A CHANCE OF FREEZING RAIN...POSSIBLY
MIXED WITH RAIN AFTER MIDNIGHT. WAVES SUBSIDING TO 2 TO 4 FEET...
THEN BUILDING TO 3 TO 5 FEET.
.SUNDAY...EAST WINDS 10 TO 20 KNOTS. A CHANCE OF RAIN...POSSIBLY
MIXED WITH FREEZING RAIN THROUGH EARLY AFTERNOON...THEN RAIN
LIKELY BY MID AFTERNOON. WAVES SUBSIDING TO 1 TO 3 FEET.
.SUNDAY NIGHT...EAST WINDS 5 TO 15 KNOTS BACKING NORTHWEST AFTER
MIDNIGHT. RAIN LIKELY THROUGH MIDNIGHT. A CHANCE OF RAIN AFTER
MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.MONDAY...NORTHWEST WINDS 10 TO 20 KNOTS. A CHANCE OF RAIN. WAVES
CALM TO 2 FEET.
.MONDAY NIGHT...NORTHWEST WINDS 10 TO 20 KNOTS. WAVES CALM TO
2 FEET.
.TUESDAY...NORTH WINDS 10 TO 20 KNOTS. WAVES CALM TO 2 FEET.
.WEDNESDAY...NORTHEAST WINDS 10 TO 20 KNOTS VEERING SOUTHEAST.
WAVES CALM TO 2 FEET.

$$

LSZ266-250400-
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-
352 PM EDT FRI MAR 24 2017

.LATE THIS AFTERNOON...NORTH WINDS 15 TO 25 KNOTS. WAVES 1 TO
3 FEET BUILDING TO 2 TO 4 FEET.
.TONIGHT...NORTHEAST WINDS 15 TO 25 KNOTS BECOMING EAST 20 TO
30 KNOTS AFTER MIDNIGHT. WAVES BUILDING TO 3 TO 6 FEET.
.SATURDAY...EAST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO
30 KNOTS BY MID AFTERNOON. WAVES 3 TO 5 FEET.
.SATURDAY NIGHT...EAST WINDS 15 TO 25 KNOTS. A CHANCE OF FREEZING
RAIN...POSSIBLY MIXED WITH RAIN...SNOW AND SLEET AFTER MIDNIGHT.
WAVES SUBSIDING TO 2 TO 4 FEET...THEN BUILDING TO 3 TO 5 FEET.
.SUNDAY...EAST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO 20 KNOTS
BY MID AFTERNOON. A SLIGHT CHANCE OF FREEZING RAIN THROUGH EARLY
AFTERNOON. RAIN LIKELY. WAVES SUBSIDING TO 1 TO 3 FEET.
.SUNDAY NIGHT...EAST WINDS 5 TO 15 KNOTS BACKING NORTH AFTER
MIDNIGHT. RAIN LIKELY. WAVES SUBSIDING TO CALM TO 2 FEET.
.MONDAY...NORTHWEST WINDS 10 TO 20 KNOTS. A CHANCE OF RAIN. WAVES
CALM TO 2 FEET.
.MONDAY NIGHT...NORTHWEST WINDS 10 TO 20 KNOTS VEERING NORTH
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.TUESDAY...NORTH WINDS 10 TO 20 KNOTS. WAVES CALM TO 2 FEET.
.WEDNESDAY...NORTHEAST WINDS 10 TO 20 KNOTS VEERING EAST. WAVES
CALM TO 2 FEET.

$$

LSZ267-250400-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
352 PM EDT FRI MAR 24 2017

.LATE THIS AFTERNOON...NORTH WINDS 10 TO 20 KNOTS. WAVES CALM TO
2 FEET.
.TONIGHT...NORTHEAST WINDS 15 TO 25 KNOTS VEERING EAST AFTER
MIDNIGHT. WAVES BUILDING TO 3 TO 5 FEET...THEN SUBSIDING TO 2 TO
4 FEET.
.SATURDAY...EAST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO 1 TO 3 FEET.
.SATURDAY NIGHT...EAST WINDS 15 TO 25 KNOTS BECOMING SOUTHEAST
20 TO 30 KNOTS AFTER MIDNIGHT. A CHANCE OF FREEZING RAIN...
POSSIBLY MIXED WITH SNOW AND SLEET AFTER MIDNIGHT. WAVES BUILDING
TO 3 TO 5 FEET...THEN SUBSIDING TO 2 TO 4 FEET.
.SUNDAY...SOUTHEAST WINDS 15 TO 25 KNOTS BACKING EAST BY MID
AFTERNOON. FREEZING RAIN LIKELY THROUGH EARLY AFTERNOON. RAIN
LIKELY. WAVES SUBSIDING TO CALM TO 2 FEET.
.SUNDAY NIGHT...EAST WINDS 10 TO 20 KNOTS BECOMING NORTHEAST 5 TO
15 KNOTS AFTER MIDNIGHT. RAIN LIKELY THROUGH MIDNIGHT...THEN A
CHANCE OF RAIN AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.MONDAY...NORTHWEST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS BY MID AFTERNOON. A CHANCE OF RAIN. WAVES CALM TO
2 FEET.
.MONDAY NIGHT...NORTHWEST WINDS 10 TO 20 KNOTS VEERING NORTH
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.TUESDAY...NORTHWEST WINDS 10 TO 20 KNOTS VEERING NORTH. WAVES
CALM TO 2 FEET.
.WEDNESDAY...NORTH WINDS 10 TO 20 KNOTS VEERING EAST. WAVES CALM
TO 2 FEET.

$$

LSZ261-250400-
MAFOR 2421/
SUPERIOR WEST 11120 11130 14230 11230 11240. WAVES 1 TO 6 FEET.

SUPERIOR NORTH CENTRAL 11130 12140 11130 11230 12220 11230. WAVES
1 TO 6 FEET.

SUPERIOR SOUTH CENTRAL 11820 13130 11230 12220 11230. WAVES 1 TO
6 FEET.

SUPERIOR EAST 11820 11130 12140 12230 12220. WAVES 1 TO 6 FEET.

$$

KEC



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