Great Lakes Forecast
Issued by NWS

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566
FZUS63 KMQT 231958
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
358 PM EDT THU MAR 23 2017

FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE SUPERIOR

.SYNOPSIS...A 30.6 INCH HIGH PRESSURE RIDGE CENTERED OVER THE
LOWER GREAT LAKES WILL DRIFT TO THE EAST COAST THIS EVENING AS A
29.3 INCH LOW PRESSURE DEEPENS OVER EASTERN COLORADO. A 29.9 INCH
TROUGH MOVES ACROSS THE UPPER GREAT LAKES TONIGHT AND FRIDAY
MORNING. ON FRIDAY AFTERNOON...THE 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.
HIGH PRESSURE WILL MOVE TO NEW ENGLAND SATURDAY NIGHT AND SUNDAY
WHILE THE LOW OVER ILLINOIS FURTHER WEAKENS. A 29.7 INCH TROUGH
WILL THEN MOVE THROUGH THE EASTERN GREAT LAKES MONDAY NIGHT AND
TUESDAY AS A 30.2 INCH RIDGE BUILDS OVER THE WESTERN GREAT LAKES
TUESDAY.

LSZ162-240400-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
358 PM EDT THU MAR 23 2017 /258 PM CDT THU MAR 23 2017/

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

$$

LSZ263-240400-
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-
358 PM EDT THU MAR 23 2017

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

$$

LSZ264-240400-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
358 PM EDT THU MAR 23 2017

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

$$

LSZ265-240400-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
358 PM EDT THU MAR 23 2017

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

$$

LSZ266-240400-
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-
358 PM EDT THU MAR 23 2017

.LATE THIS AFTERNOON...SOUTH WINDS 20 TO 30 KNOTS. A CHANCE OF
RAIN AND SNOW. WAVES 4 TO 7 FEET SUBSIDING TO 3 TO 6 FEET.
.TONIGHT...SOUTH WINDS 20 TO 30 KNOTS DIMINISHING TO 10 TO
20 KNOTS AFTER MIDNIGHT. RAIN AND SNOW LIKELY...POSSIBLY MIXED
WITH FREEZING RAIN. WAVES BUILDING TO 4 TO 7 FEET...THEN
SUBSIDING TO 1 TO 3 FEET.
.FRIDAY...NORTHWEST WINDS 5 TO 15 KNOTS BECOMING NORTH 15 TO
25 KNOTS BY MID AFTERNOON. A CHANCE OF RAIN. WAVES SUBSIDING TO
CALM TO 2 FEET...THEN BUILDING TO 2 TO 4 FEET.
.FRIDAY NIGHT...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. WAVES SUBSIDING TO 2 TO
4 FEET.
.SATURDAY NIGHT...EAST WINDS 15 TO 25 KNOTS. A CHANCE OF RAIN. A
CHANCE OF FREEZING RAIN AFTER MIDNIGHT. WAVES 2 TO 4 FEET.
.SUNDAY...EAST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO 20 KNOTS
BY MID AFTERNOON. A CHANCE OF RAIN AND FREEZING RAIN. WAVES
SUBSIDING TO CALM TO 2 FEET.
.SUNDAY NIGHT...EAST WINDS 10 TO 20 KNOTS BECOMING NORTHEAST 5 TO
15 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN. WAVES CALM TO 2 FEET.
.MONDAY...NORTH WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS. RAIN LIKELY IN THE MORNING...THEN A CHANCE OF RAIN. A
CHANCE OF SNOW. WAVES CALM TO 2 FEET.
.TUESDAY...NORTH WINDS 15 TO 25 KNOTS. WAVES BUILDING TO 1 TO
3 FEET...THEN SUBSIDING TO CALM TO 2 FEET.

$$

LSZ267-240400-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
358 PM EDT THU MAR 23 2017

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

$$

LSZ261-240400-
MAFOR 2321/
SUPERIOR WEST 11410 12416 11507 12700 11810 11110. CHANCE OF RAIN
THROUGH EARLY EVENING. CHANCE OF RAIN AND SNOW OVERNIGHT THROUGH
MID MORNING FRIDAY. WAVES 2 FEET OR LESS.

SUPERIOR NORTH CENTRAL 11430 11436 11437 11427 11507 11610 11810
11820. CHANCE OF RAIN AND SNOW THROUGH EARLY EVENING. CHANCE OF
RAIN AND SNOW OVERNIGHT THROUGH MID MORNING FRIDAY. WAVES 1 TO 6
FEET.

SUPERIOR SOUTH CENTRAL 11430 11446 11436 11427 11506 11600 11710
11810. CHANCE OF RAIN AND SNOW THROUGH EARLY EVENING. CHANCE OF
LIGHT FREEZING RAIN OVERNIGHT THROUGH FRIDAY MORNING. CHANCE OF
RAIN FRIDAY. WAVES 1 TO 5 FEET.

SUPERIOR EAST 12440 11447 11427 11417 11510 11710 11810. CHANCE
OF RAIN AND SNOW THROUGH EARLY EVENING. CHANCE OF LIGHT FREEZING
RAIN LATE TONIGHT THROUGH FRIDAY MORNING. CHANCE OF RAIN FRIDAY.
WAVES 1 TO 6 FEET.


$$

KEC



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