Great Lakes Forecast
Issued by NWS

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000
FZUS63 KMQT 180752
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
352 AM EDT SAT APR 18 2015

FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE SUPERIOR

.SYNOPSIS...30.3 INCH HIGH PRESSURE OVER NORTHWEST ONTARIO THIS
MORNING WILL DRIFT EAST INTO QUEBEC ON SUNDAY. MEANWHILE...29.6 INCH
LOW PRESSURE MOVING INTO MINNESOTA ON SUNDAY MORNING WILL MERGE WITH
ANOTHER 29.5 INCH LOW PRESSURE SYSTEM LIFTING NORTHEAST INTO THE
LOWER LAKES...RESULTING IN A DEEPER 29.2 INCH LOW PRESSURE NEAR THE
UPPER GREAT LAKES ON MONDAY. ALTHOUGH THIS LOW WILL SHIFT NORTHEAST
TO NEAR JAMES BAY ON TUESDAY...A TROUGH OF LOW PRESSURE AVERAGING
29.5 INCHES ON ITS SOUTHWEST FLANK WILL EXTEND BACK INTO THE UPPER
GREAT LAKES. THESE FEATURES WILL REMAIN NEARLY STATIONARY BUT WEAKEN
SLOWLY THROUGH WEDNESDAY...TO THE EAST OF A 30.1 INCH HIGH PRESSURE
RIDGE BUILDING OVER THE NORTHERN PLAINS.

LSZ162-181600-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
352 AM EDT SAT APR 18 2015

.EARLY THIS MORNING...NORTHEAST WINDS 10 TO 20 KNOTS. WAVES CALM
TO 2 FEET.
.TODAY...EAST WINDS 10 TO 20 KNOTS BACKING NORTHEAST BY MID
AFTERNOON. WAVES BUILDING TO 3 TO 5 FEET.
.TONIGHT...EAST WINDS 10 TO 20 KNOTS. A CHANCE OF RAIN AFTER
MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET.
.SUNDAY...EAST WINDS 5 TO 15 KNOTS. RAIN. WAVES SUBSIDING TO CALM
TO 2 FEET.
.SUNDAY NIGHT...NORTH WINDS 5 TO 15 KNOTS BACKING NORTHWEST AFTER
MIDNIGHT. A CHANCE OF RAIN THROUGH MIDNIGHT...THEN RAIN LIKELY
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.MONDAY...WEST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO 20 KNOTS
BY MID AFTERNOON. A CHANCE OF RAIN SHOWERS. WAVES CALM TO 2 FEET.
.MONDAY NIGHT...WEST WINDS 15 TO 25 KNOTS VEERING NORTHWEST AFTER
MIDNIGHT. A CHANCE OF RAIN SHOWERS THROUGH MIDNIGHT. A CHANCE OF
SNOW SHOWERS. WAVES BUILDING TO 1 TO 3 FEET...THEN SUBSIDING TO
CALM TO 2 FEET.
.TUESDAY...NORTHWEST WINDS 15 TO 25 KNOTS. A CHANCE OF RAIN
SHOWERS. A CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO CALM TO
2 FEET.
.WEDNESDAY...NORTHWEST WINDS 10 TO 20 KNOTS. WAVES CALM TO
2 FEET.

$$

LSZ263-181600-
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 AM EDT SAT APR 18 2015

.EARLY THIS MORNING...NORTHEAST WINDS 10 TO 20 KNOTS. WAVES 1 TO
3 FEET.
.TODAY...NORTHEAST WINDS 5 TO 15 KNOTS BECOMING EAST 10 TO
20 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET...
THEN BUILDING TO 3 TO 5 FEET.
.TONIGHT...EAST WINDS 10 TO 20 KNOTS VEERING SOUTHEAST AFTER
MIDNIGHT. A SLIGHT CHANCE OF RAIN AFTER MIDNIGHT. WAVES SUBSIDING
TO 1 TO 3 FEET.
.SUNDAY...SOUTHEAST WINDS 10 TO 20 KNOTS BACKING EAST BY MID
AFTERNOON. RAIN LIKELY. WAVES BUILDING TO 3 TO 6 FEET.
.SUNDAY NIGHT...SOUTHEAST WINDS 5 TO 15 KNOTS. RAIN LIKELY. WAVES
SUBSIDING TO 1 TO 3 FEET.
.MONDAY...WEST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO 20 KNOTS
BY MID AFTERNOON. A CHANCE OF RAIN SHOWERS. WAVES SUBSIDING TO
CALM TO 2 FEET...THEN BUILDING TO 1 TO 3 FEET.
.MONDAY NIGHT...WEST WINDS 10 TO 20 KNOTS BECOMING NORTHWEST
15 TO 25 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN AND SNOW SHOWERS.
WAVES 1 TO 3 FEET.
.TUESDAY...NORTHWEST WINDS 15 TO 25 KNOTS. A CHANCE OF RAIN
SHOWERS. A CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO CALM TO
2 FEET...THEN BUILDING TO 1 TO 3 FEET.
.WEDNESDAY...NORTHWEST WINDS 10 TO 20 KNOTS. A CHANCE OF SNOW
SHOWERS. WAVES SUBSIDING TO CALM TO 2 FEET.

$$

LSZ264-181600-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
352 AM EDT SAT APR 18 2015

.EARLY THIS MORNING...NORTH WINDS 10 TO 20 KNOTS. WAVES 1 TO
3 FEET.
.TODAY...NORTHEAST WINDS 5 TO 15 KNOTS VEERING EAST BY MID
AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.TONIGHT...EAST WINDS 10 TO 20 KNOTS BECOMING SOUTHEAST 15 TO
25 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF RAIN AFTER MIDNIGHT.
WAVES BUILDING TO 2 TO 4 FEET.
.SUNDAY...SOUTHEAST WINDS 20 TO 30 KNOTS. A CHANCE OF RAIN
THROUGH EARLY AFTERNOON...THEN RAIN LIKELY BY MID AFTERNOON.
WAVES BUILDING TO 5 TO 8 FEET.
.SUNDAY NIGHT...SOUTHEAST WINDS 15 TO 25 KNOTS DIMINISHING TO
10 TO 20 KNOTS AFTER MIDNIGHT. RAIN LIKELY. WAVES SUBSIDING TO
2 TO 4 FEET.
.MONDAY...SOUTHEAST WINDS 5 TO 15 KNOTS BECOMING WEST 10 TO
20 KNOTS BY MID AFTERNOON. A CHANCE OF RAIN SHOWERS. WAVES
SUBSIDING TO CALM TO 2 FEET...THEN BUILDING TO 1 TO 3 FEET.
.MONDAY NIGHT...WEST WINDS 10 TO 20 KNOTS VEERING NORTHWEST AFTER
MIDNIGHT. A CHANCE OF RAIN AND SNOW SHOWERS. WAVES SUBSIDING TO
CALM TO 2 FEET.
.TUESDAY...NORTHWEST WINDS 15 TO 25 KNOTS. A CHANCE OF SNOW
SHOWERS. WAVES BUILDING TO 1 TO 3 FEET.
.WEDNESDAY...NORTHWEST WINDS 15 TO 25 KNOTS. A CHANCE OF SNOW
SHOWERS. WAVES SUBSIDING TO CALM TO 2 FEET.

NOTE...WAVE HEIGHT FORECASTS ARE FOR ICE FREE AREAS.

$$

LSZ265-181600-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
352 AM EDT SAT APR 18 2015

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

NOTE...WAVE HEIGHT FORECASTS ARE FOR ICE FREE AREAS.

$$

LSZ266-181600-
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 AM EDT SAT APR 18 2015

.EARLY THIS MORNING...NORTH WINDS 15 TO 25 KNOTS. WAVES 3 TO
5 FEET.
.TODAY...NORTH WINDS 5 TO 15 KNOTS DIMINISHING TO LESS THAN
10 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.TONIGHT...EAST WINDS 5 TO 15 KNOTS BECOMING SOUTHEAST 10 TO
20 KNOTS AFTER MIDNIGHT. WAVES BUILDING TO 3 TO 5 FEET.
.SUNDAY...SOUTHEAST WINDS 20 TO 30 KNOTS. A CHANCE OF RAIN. WAVES
BUILDING TO 5 TO 8 FEET.
.SUNDAY NIGHT...SOUTHEAST WINDS 15 TO 25 KNOTS DIMINISHING TO
10 TO 20 KNOTS AFTER MIDNIGHT. RAIN. WAVES SUBSIDING TO 2 TO
4 FEET.
.MONDAY...SOUTH WINDS 5 TO 15 KNOTS BECOMING WEST 10 TO 20 KNOTS
BY MID AFTERNOON. RAIN SHOWERS LIKELY THROUGH EARLY AFTERNOON...
THEN A CHANCE OF RAIN SHOWERS BY MID AFTERNOON. WAVES SUBSIDING
TO CALM TO 2 FEET...THEN BUILDING TO 1 TO 3 FEET.
.MONDAY NIGHT...WEST WINDS 10 TO 20 KNOTS. A CHANCE OF RAIN AND
SNOW SHOWERS. WAVES SUBSIDING TO CALM TO 2 FEET.
.TUESDAY...WEST WINDS 15 TO 25 KNOTS VEERING NORTHWEST. A CHANCE
OF SNOW SHOWERS. WAVES BUILDING TO 2 TO 4 FEET.
.WEDNESDAY...NORTHWEST WINDS 15 TO 25 KNOTS. A CHANCE OF SNOW
SHOWERS. WAVES SUBSIDING TO 1 TO 3 FEET.

NOTE...WAVE HEIGHT FORECASTS ARE FOR ICE FREE AREAS.

$$

LSZ267-181600-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
352 AM EDT SAT APR 18 2015

.EARLY THIS MORNING...NORTH WINDS 15 TO 25 KNOTS. WAVES 1 TO
3 FEET.
.TODAY...NORTH WINDS 5 TO 15 KNOTS BACKING NORTHWEST BY MID
AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.TONIGHT...EAST WINDS 5 TO 15 KNOTS BECOMING SOUTHEAST 15 TO
25 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.SUNDAY...SOUTHEAST WINDS 20 TO 30 KNOTS. A CHANCE OF RAIN BY MID
AFTERNOON. WAVES BUILDING TO 1 TO 3 FEET.
.SUNDAY NIGHT...SOUTHEAST WINDS 15 TO 25 KNOTS DIMINISHING TO
10 TO 20 KNOTS AFTER MIDNIGHT. RAIN. WAVES SUBSIDING TO CALM TO
2 FEET.
.MONDAY...SOUTHEAST WINDS 10 TO 20 KNOTS VEERING WEST BY MID
AFTERNOON. RAIN SHOWERS LIKELY THROUGH EARLY AFTERNOON...THEN A
CHANCE OF RAIN SHOWERS BY MID AFTERNOON. WAVES CALM TO 2 FEET.
.MONDAY NIGHT...WEST WINDS 10 TO 20 KNOTS BACKING SOUTHWEST AFTER
MIDNIGHT. A CHANCE OF SNOW SHOWERS. WAVES CALM TO 2 FEET.
.TUESDAY...WEST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS. A CHANCE OF SNOW SHOWERS. WAVES BUILDING TO 1 TO
3 FEET.
.WEDNESDAY...NORTHWEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS. A CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO CALM TO
2 FEET.

NOTE...WAVE HEIGHT FORECASTS ARE FOR ICE FREE AREAS.

$$

LSZ261-181600-
MAFOR 1809/
SUPERIOR WEST 11120 11200 11210 12120 11230 12220. WAVES 1 TO 5
FEET.

SUPERIOR NORTH CENTRAL 11830 12110 11200 12210 11310 11320. WAVES
1 TO 3 FEET.

SUPERIOR SOUTH CENTRAL 11830 11810 11110 11100 11200 11210 12310.
WAVES 1 TO 4 FEET.

SUPERIOR EAST 11830 12810 11700 11800 11100 11210 11320. WAVES 1 TO
4 FEET.

$$

KF


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