Great Lakes Forecast
Issued by NWS

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000
FZUS63 KMQT 251953
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
353 PM EDT SAT MAR 25 2017

FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE SUPERIOR

.SYNOPSIS...A 29.7 INCH LOW OVER NORTHERN MISSOURI WILL TRACK
INTO NORTHERN ILLINOIS LATE TONIGHT WHILE HIGH PRESSURE OF 30.6
INCHES MOVES EAST ACROSS QUEBEC. THE HIGH WILL SLIDE ACROSS NEW
ENGLAND AND FAR EASTERN QUEBEC SUNDAY INTO SUNDAY NIGHT WHILE THE
LOW OVER ILLINOIS LIFTS ACROSS CENTRAL LAKE MICHIGAN. EXPECT THE LOW
TO TRACK NEAR GEORGIAN BAY AT 29.8 INCHES ON MONDAY MORNING AND THEN
DRIFT ACROSS THE LOWER GREAT LAKES MONDAY AFTERNOON INTO TUESDAY AS
A 30.2 INCH RIDGE BUILDS OVER THE WESTERN GREAT LAKES. THIS RIDGE
WILL BUILD TO 30.4 INCHES OVER THE UPPER GREAT LAKES ON WEDNESDAY.
THE RIDGE AXIS SHIFTS TO THE EAST ON THURSDAY AS A 29.9 INCH LOW
MOVES ACROSS NORTHERN ONTARIO.

LSZ162-260400-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
353 PM EDT SAT MAR 25 2017 /253 PM CDT SAT MAR 25 2017/

.LATE THIS AFTERNOON...EAST WINDS 20 TO 30 KNOTS. WAVES 3 TO
6 FEET BUILDING TO 4 TO 7 FEET.
.TONIGHT...EAST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN WITH A SLIGHT CHANCE OF
FREEZING RAIN AFTER MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET.
.SUNDAY...NORTHEAST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS BY MID AFTERNOON. A SLIGHT CHANCE OF FREEZING RAIN
THROUGH EARLY AFTERNOON...OTHERWISE A CHANCE OF RAIN. WAVES 1 TO
3 FEET.
.SUNDAY NIGHT...NORTHEAST WINDS 5 TO 15 KNOTS BACKING NORTHWEST
AFTER MIDNIGHT. A SLIGHT CHANCE OF RAIN THROUGH MIDNIGHT. PATCHY
FOG. WAVES SUBSIDING TO CALM TO 2 FEET.
.MONDAY...NORTH WINDS 5 TO 15 KNOTS BECOMING SOUTH LESS THAN
10 KNOTS BY MID AFTERNOON. WAVES CALM TO 2 FEET.
.MONDAY NIGHT...EAST WINDS 5 TO 15 KNOTS BACKING NORTHEAST AFTER
MIDNIGHT. WAVES CALM TO 2 FEET.
.TUESDAY...NORTHEAST WINDS 5 TO 15 KNOTS VEERING EAST BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
.TUESDAY NIGHT...EAST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
.WEDNESDAY...EAST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS. WAVES BUILDING TO 1 TO 3 FEET...THEN SUBSIDING TO CALM
TO 2 FEET.
.THURSDAY...EAST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS. WAVES CALM TO 2 FEET.

$$

LSZ263-260400-
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-
353 PM EDT SAT MAR 25 2017

.LATE THIS AFTERNOON...EAST WINDS 15 TO 25 KNOTS. WAVES 3 TO
6 FEET.
.TONIGHT...EAST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN...POSSIBLY MIXED WITH
FREEZING RAIN AFTER MIDNIGHT. WAVES SUBSIDING TO 3 TO 5 FEET.
.SUNDAY...EAST WINDS 5 TO 15 KNOTS BACKING NORTHEAST BY MID
AFTERNOON. A SLIGHT CHANCE OF FREEZING RAIN THROUGH EARLY
AFTERNOON...OTHERWISE A CHANCE OF RAIN. WAVES SUBSIDING TO 1 TO 3
FEET.
.SUNDAY NIGHT...NORTH WINDS 5 TO 15 KNOTS. PATCHY FOG. A SLIGHT
CHANCE OF RAIN. WAVES SUBSIDING TO CALM TO 2 FEET.
.MONDAY...NORTH WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
.MONDAY NIGHT...NORTH WINDS LESS THAN 10 KNOTS INCREASING TO 5 TO
15 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.TUESDAY...NORTHEAST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
.TUESDAY NIGHT...NORTHEAST WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
.WEDNESDAY...EAST WINDS 5 TO 15 KNOTS VEERING SOUTHEAST. WAVES
BUILDING TO 1 TO 3 FEET...THEN SUBSIDING TO CALM TO 2 FEET.
.THURSDAY...SOUTHEAST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.

$$

LSZ264-260400-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
353 PM EDT SAT MAR 25 2017

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

$$

LSZ265-260400-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
353 PM EDT SAT MAR 25 2017

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

$$

LSZ266-260400-
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-
353 PM EDT SAT MAR 25 2017

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

$$

LSZ267-260400-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
353 PM EDT SAT MAR 25 2017

.LATE THIS AFTERNOON...EAST WINDS 10 TO 20 KNOTS. WAVES 1 TO
3 FEET.
.TONIGHT...EAST WINDS 10 TO 20 KNOTS BECOMING SOUTHEAST 20 TO
30 KNOTS AFTER MIDNIGHT. FREEZING RAIN AFTER MIDNIGHT. WAVES
BUILDING TO 3 TO 5 FEET.
.SUNDAY...SOUTHEAST WINDS 15 TO 25 KNOTS. FREEZING RAIN THROUGH
EARLY AFTERNOON...THEN RAIN LIKELY WITH A SLIGHT CHANCE OF
FREEZING RAIN. WAVES SUBSIDING TO 1 TO 3 FEET.
.SUNDAY NIGHT...EAST WINDS 5 TO 15 KNOTS BACKING NORTH AFTER
MIDNIGHT. PATCHY FOG. RAIN LIKELY THROUGH MIDNIGHT...THEN A
CHANCE OF RAIN AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.MONDAY...NORTH WINDS 10 TO 20 KNOTS BACKING NORTHWEST BY MID
AFTERNOON. A CHANCE OF RAIN THROUGH EARLY AFTERNOON. WAVES CALM
TO 2 FEET.
.MONDAY NIGHT...NORTH WINDS 10 TO 20 KNOTS. WAVES BUILDING TO
1 TO 3 FEET...THEN SUBSIDING TO CALM TO 2 FEET.
.TUESDAY...NORTH WINDS 5 TO 15 KNOTS INCREASING TO 10 TO 20 KNOTS
BY MID AFTERNOON. WAVES CALM TO 2 FEET.
.TUESDAY NIGHT...NORTH WINDS 10 TO 20 KNOTS. WAVES CALM TO
2 FEET.
.WEDNESDAY...NORTH WINDS 10 TO 20 KNOTS VEERING EAST. WAVES CALM
TO 2 FEET.
.THURSDAY...SOUTHEAST WINDS 10 TO 20 KNOTS. WAVES CALM TO 2 FEET.

$$

LSZ261-260400-
MAFOR 2521/
SUPERIOR WEST 13230 12220 11210 12110. CHANCE OF RAIN OVERNIGHT
AND SUNDAY. WAVES 4 TO 7 FEET SUBSIDING TO 2 TO 4 FEET TONIGHT.
WAVES 2 TO 3 FEET SUNDAY.

SUPERIOR NORTH CENTRAL 11220 11230 13330 12326 11210. CHANCE OF
RAIN LATE. WAVES 3 TO 6 FEET.

SUPERIOR SOUTH CENTRAL 11220 11230 12330 11326 11226 11216 11210.
CHANCE OF LIGHT FREEZING RAIN LATE IN THE MORNING. CHANCE OF RAIN
LATE SUNDAY. WAVES 3 TO 5 FEET TONIGHT SUBSIDING TO 2 TO 3 FEET
SUNDAY.

SUPERIOR EAST 12220 13330 11340 12336. CHANCE OF LIGHT FREEZING
RAIN LATE TONIGHT AND EARLY SUNDAY AFTERNOON. WAVES 1 TO 3 FEET
BUILDING TO 3 TO 5 FEET TONIGHT. WAVES 3 TO 5 FEET SUNDAY.

$$

RJT



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