Great Lakes Forecast
Issued by NWS

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050
FZUS63 KMQT 030203
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
1003 PM EDT MON MAY 2 2016

FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE SUPERIOR

.SYNOPSIS...A 30.1 INCH HIGH PRESSURE RIDGE FROM NEAR JAMES BAY INTO
THE UPPER GREAT LAKES WILL SLIDE SOUTHEAST OF THE AREA LATER TONIGHT
AS A 29.5 INCH LOW PRESSURE APPROACHES FROM NORTHERN ONTARIO. THIS
LOW WILL PUSH A 29.6 INCH TROUGH ACROSS LAKE SUPERIOR BY TUESDAY
AFTERNOON. AS THE TROUGH MOVES EASTWARD TUESDAY NIGHT INTO
WEDNESDAY...30.1 INCH HIGH PRESSURE WILL BUILD ACROSS MANITOBA AND
FAR NORTHWEST ONTARIO AND THEN INTO THE UPPER GREAT LAKES THURSDAY
INTO FRIDAY. FRIDAY NIGHT INTO SATURDAY...LOW PRESSURE OF 29.6 INCHES
WILL SLIDE ACROSS CENTRAL CANADA TO NEAR JAMES BAY. THIS WILL PUSH A
29.7 INCH TROUGH ACROSS LAKE SUPERIOR THROUGH THE SAME TIME PERIOD.

LSZ162-031015-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
1003 PM EDT MON MAY 2 2016 /903 PM CDT MON MAY 2 2016/

.REST OF TONIGHT...SOUTHWEST WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET BUILDING TO 1 TO 3 FEET.
.TUESDAY...SOUTHWEST WINDS 10 TO 20 KNOTS VEERING NORTH BY MID
AFTERNOON. A CHANCE OF RAIN SHOWERS AND A SLIGHT CHANCE OF
THUNDERSTORMS. WAVES BUILDING TO 2 TO 4 FEET...THEN SUBSIDING TO
CALM TO 2 FEET.
.TUESDAY NIGHT...NORTH WINDS 10 TO 20 KNOTS. A SLIGHT CHANCE OF
RAIN SHOWERS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.WEDNESDAY...NORTH WINDS 5 TO 15 KNOTS BECOMING EAST LESS THAN
10 KNOTS BY MID AFTERNOON. WAVES CALM TO 2 FEET.
.WEDNESDAY NIGHT...SOUTHEAST WINDS 5 TO 15 KNOTS BECOMING SOUTH LESS
THAN 10 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.THURSDAY...SOUTH WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
.THURSDAY NIGHT...SOUTHWEST WINDS 10 TO 20 KNOTS DIMINISHING TO
5 TO 15 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.FRIDAY...SOUTHWEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS. A CHANCE OF RAIN SHOWERS. WAVES CALM TO 2 FEET.
.SATURDAY...NORTHWEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS. A CHANCE OF RAIN SHOWERS. WAVES CALM TO 2 FEET.

$$

LSZ263-031015-
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-
1003 PM EDT MON MAY 2 2016

.REST OF TONIGHT...SOUTHWEST WINDS 5 TO 15 KNOTS INCREASING TO
10 TO 20 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET BUILDING TO
1 TO 3 FEET.
.TUESDAY...SOUTHWEST WINDS 10 TO 20 KNOTS BECOMING WEST 5 TO
15 KNOTS BY MID AFTERNOON. A CHANCE OF RAIN SHOWERS AND A SLIGHT
CHANCE OF THUNDERSTORMS. WAVES BUILDING TO 3 TO 5 FEET...THEN
SUBSIDING TO 1 TO 3 FEET.
.TUESDAY NIGHT...NORTH WINDS 10 TO 20 KNOTS. A SLIGHT CHANCE OF
RAIN SHOWERS. A SLIGHT CHANCE OF SNOW SHOWERS AFTER MIDNIGHT.
WAVES BUILDING TO 2 TO 4 FEET.
.WEDNESDAY...NORTH WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS BY MID AFTERNOON. A SLIGHT CHANCE OF RAIN SHOWERS
THROUGH EARLY AFTERNOON. WAVES SUBSIDING TO 1 TO 3 FEET.
.WEDNESDAY NIGHT...NORTH WINDS 5 TO 15 KNOTS BECOMING WEST LESS
THAN 10 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.THURSDAY...SOUTHWEST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
.THURSDAY NIGHT...SOUTHWEST WINDS 10 TO 20 KNOTS DIMINISHING TO
5 TO 15 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.FRIDAY...SOUTHWEST WINDS 5 TO 15 KNOTS. A CHANCE OF RAIN
SHOWERS. WAVES CALM TO 2 FEET.
.SATURDAY...WEST WINDS 10 TO 20 KNOTS. WAVES CALM TO 2 FEET.

$$

LSZ264-031015-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
1003 PM EDT MON MAY 2 2016

.REST OF TONIGHT...SOUTHWEST WINDS 5 TO 15 KNOTS INCREASING TO
10 TO 20 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF RAIN SHOWERS
AFTER MIDNIGHT. WAVES CALM TO 2 FEET BUILDING TO 1 TO 3 FEET.
.TUESDAY...SOUTHWEST WINDS 10 TO 20 KNOTS VEERING NORTHWEST BY
MID AFTERNOON. A CHANCE OF RAIN SHOWERS. WAVES BUILDING TO 2 TO
4 FEET...THEN SUBSIDING TO 1 TO 3 FEET.
.TUESDAY NIGHT...NORTH WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF RAIN SHOWERS. A
SLIGHT CHANCE OF SNOW SHOWERS AFTER MIDNIGHT. WAVES BUILDING TO
3 TO 5 FEET...THEN SUBSIDING TO 2 TO 4 FEET.
.WEDNESDAY...NORTH WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS BY MID AFTERNOON. WAVES BUILDING TO 3 TO 6 FEET...THEN
SUBSIDING TO 1 TO 3 FEET.
.WEDNESDAY NIGHT...NORTH WINDS 5 TO 15 KNOTS. WAVES SUBSIDING TO
CALM TO 2 FEET.
.THURSDAY...WEST WINDS LESS THAN 10 KNOTS BECOMING SOUTHWEST 5 TO
15 KNOTS BY MID AFTERNOON. WAVES CALM TO 2 FEET.
.THURSDAY NIGHT...SOUTHWEST WINDS 10 TO 20 KNOTS. WAVES CALM TO
2 FEET.
.FRIDAY...SOUTH WINDS 5 TO 15 KNOTS. A CHANCE OF RAIN SHOWERS.
WAVES CALM TO 2 FEET.
.SATURDAY...NORTHWEST WINDS 10 TO 20 KNOTS. WAVES BUILDING TO
1 TO 3 FEET...THEN SUBSIDING TO CALM TO 2 FEET.

$$

LSZ265-031015-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
1003 PM EDT MON MAY 2 2016

.REST OF TONIGHT...SOUTH WINDS 5 TO 15 KNOTS VEERING SOUTHWEST
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.TUESDAY...SOUTHWEST WINDS 10 TO 20 KNOTS VEERING WEST BY MID
AFTERNOON. A CHANCE OF RAIN SHOWERS AND A SLIGHT CHANCE OF
THUNDERSTORMS. WAVES CALM TO 2 FEET.
.TUESDAY NIGHT...NORTH WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF RAIN SHOWERS. A
SLIGHT CHANCE OF SNOW SHOWERS AFTER MIDNIGHT. WAVES BUILDING TO
3 TO 5 FEET.
.WEDNESDAY...NORTH WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS BY MID AFTERNOON. A SLIGHT CHANCE OF RAIN SHOWERS
THROUGH EARLY AFTERNOON. WAVES 3 TO 6 FEET.
.WEDNESDAY NIGHT...NORTH WINDS 5 TO 15 KNOTS. WAVES SUBSIDING TO
CALM TO 2 FEET.
.THURSDAY...NORTHWEST WINDS LESS THAN 10 KNOTS BACKING WEST BY
MID AFTERNOON. WAVES CALM TO 2 FEET.
.THURSDAY NIGHT...SOUTH WINDS 5 TO 15 KNOTS BECOMING SOUTHWEST
10 TO 20 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.FRIDAY...WEST WINDS 5 TO 15 KNOTS BACKING SOUTH. WAVES CALM TO
2 FEET.
.SATURDAY...NORTHWEST WINDS 10 TO 20 KNOTS. A CHANCE OF
THUNDERSTORMS. WAVES CALM TO 2 FEET.

$$

LSZ266-031015-
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-
1003 PM EDT MON MAY 2 2016

.REST OF TONIGHT...SOUTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTH
AFTER MIDNIGHT. WAVES CALM TO 2 FEET BUILDING TO 1 TO 3 FEET.
.TUESDAY...SOUTHWEST WINDS 10 TO 20 KNOTS BECOMING WEST 5 TO
15 KNOTS BY MID AFTERNOON. A CHANCE OF RAIN SHOWERS. A SLIGHT
CHANCE OF THUNDERSTORMS BY MID AFTERNOON. WAVES BUILDING TO 2 TO
4 FEET...THEN SUBSIDING TO 1 TO 3 FEET.
.TUESDAY NIGHT...NORTHWEST WINDS 10 TO 20 KNOTS BECOMING NORTH
15 TO 25 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF RAIN SHOWERS. A
SLIGHT CHANCE OF SNOW SHOWERS AFTER MIDNIGHT. WAVES BUILDING TO
3 TO 6 FEET.
.WEDNESDAY...NORTH WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS BY MID AFTERNOON. WAVES BUILDING TO 4 TO 7 FEET...THEN
SUBSIDING TO 3 TO 6 FEET.
.WEDNESDAY NIGHT...NORTH WINDS 15 TO 25 KNOTS DIMINISHING TO 5 TO
15 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET.
.THURSDAY...NORTH WINDS 5 TO 15 KNOTS BACKING WEST BY MID
AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.THURSDAY NIGHT...SOUTHWEST WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
.FRIDAY...SOUTH WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
.SATURDAY...WEST WINDS 10 TO 20 KNOTS VEERING NORTHWEST. WAVES
BUILDING TO 1 TO 3 FEET...THEN SUBSIDING TO CALM TO 2 FEET.

$$

LSZ267-031015-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
1003 PM EDT MON MAY 2 2016

.REST OF TONIGHT...WEST WINDS 5 TO 15 KNOTS BACKING SOUTH AFTER
MIDNIGHT. WAVES CALM TO 2 FEET.
.TUESDAY...SOUTH WINDS 10 TO 20 KNOTS BECOMING SOUTHWEST 5 TO
15 KNOTS BY MID AFTERNOON. A CHANCE OF RAIN SHOWERS. WAVES
BUILDING TO 1 TO 3 FEET...THEN SUBSIDING TO CALM TO 2 FEET.
.TUESDAY NIGHT...WEST WINDS 5 TO 15 KNOTS BECOMING NORTH 10 TO
20 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF RAIN SHOWERS. A
SLIGHT CHANCE OF SNOW SHOWERS AFTER MIDNIGHT. WAVES BUILDING TO
3 TO 5 FEET.
.WEDNESDAY...NORTH WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS BY MID AFTERNOON. A SLIGHT CHANCE OF RAIN SHOWERS
THROUGH EARLY AFTERNOON. WAVES BUILDING TO 4 TO 7 FEET...THEN
SUBSIDING TO 3 TO 6 FEET.
.WEDNESDAY NIGHT...NORTH WINDS 15 TO 25 KNOTS DIMINISHING TO
10 TO 20 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET.
.THURSDAY...NORTH WINDS 10 TO 20 KNOTS BACKING WEST BY MID
AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.THURSDAY NIGHT...WEST WINDS 5 TO 15 KNOTS BACKING SOUTH AFTER
MIDNIGHT. WAVES CALM TO 2 FEET.
.FRIDAY...SOUTH WINDS 5 TO 15 KNOTS. A CHANCE OF RAIN SHOWERS.
WAVES CALM TO 2 FEET.
.SATURDAY...WEST WINDS 10 TO 20 KNOTS VEERING NORTHWEST. WAVES
BUILDING TO 1 TO 3 FEET...THEN SUBSIDING TO CALM TO 2 FEET.

$$
LSZ261-031015-
MAFOR 0303/
SUPERIOR WEST 11500 11510 13520 11610 12810. CHANCE OF SHOWERS
LATE TUESDAY MORNING THROUGH TUESDAY AFTERNOON. SLIGHT CHANCE OF
THUNDERSTORMS EARLY TUESDAY AFTERNOON. WAVES 2 TO 4 FEET.

SUPERIOR NORTH CENTRAL 11510 14520 11610 11710 11820. CHANCE OF
RAIN SHOWERS TUESDAY. WAVES 1 TO 4 FEET.

SUPERIOR SOUTH CENTRAL 12400 13510 12610 11710. CHANCE OF SHOWERS
AND SLIGHT CHANCE OF THUNDERSTORMS TUESDAY AFTERNOON. WAVES 1 TO 3
FEET.

SUPERIOR EAST 12500 13410 11500 11600 11610. CHANCE OF RAIN
SHOWERS TUESDAY AFTERNOON. WAVES 1 TO 3 FEET.

$$

JS



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