Great Lakes Forecast
Issued by NWS

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000
FZUS63 KMQT 060155
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
955 PM EDT THU MAY 5 2016

FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE SUPERIOR

.SYNOPSIS...A HIGH PRESSURE RIDGE AVERAGING 30.0 INCHES OVER LAKE
HURON WILL DRIFT EAST OVERNIGHT AND FRIDAY AS LOW PRESSURE OF 29.7
INCHES OVER SOUTHERN MANITOBA MOVES SOUTHEAST INTO THE UPPER GREAT
LAKES. THIS LOW WILL REACH LAKE HURON BY SATURDAY MORNING. A 30.1
HIGH PRESSURE OVER THE NORTHERN PLAINS ON SATURDAY WILL BUILD TOWARD
THE GREAT LAKES REGION SATURDAY NIGHT AS THE LOW LIFTS NORTHEAST INTO
QUEBEC. A SECONDARY LOW PRESSURE TROUGH OF 29.8 INCHES WILL CROSS THE
UPPER GREAT LAKES LATE SATURDAY NIGHT BEFORE THE RIDGE EXPANDS ACROSS
LAKE SUPERIOR SUNDAY NIGHT. THE RIDGE WILL THEN WEAKEN TO 30.0 INCHES
OVER THE UPPER GREAT LAKES ON MONDAY. A 29.6 INCH LOW PRESSURE OVER
THE PLAINS MONDAY WILL LIFT INTO THE SOUTHERN GREAT LAKES TUESDAY AS
30.2 INCH HIGH PRESSURE BUILDS OVER NORTHERN ONTARIO.

LSZ162-061000-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
955 PM EDT THU MAY 5 2016 /855 PM CDT THU MAY 5 2016/

.REST OF TONIGHT...SOUTH WINDS 5 TO 15 KNOTS VEERING SOUTHWEST
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.FRIDAY...SOUTHWEST WINDS 5 TO 15 KNOTS. A CHANCE OF SHOWERS AND
THUNDERSTORMS LATE. WAVES BUILDING TO 1 TO 3 FEET... THEN SUBSIDING
TO CALM TO 2 FEET.
.FRIDAY NIGHT...NORTH WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS AFTER MIDNIGHT. A CHANCE OF SHOWERS AND THUNDERSTORMS.
WAVES CALM TO 2 FEET.
.SATURDAY...NORTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST BY
MID AFTERNOON. A SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS BY
MID AFTERNOON. WAVES CALM TO 2 FEET.
.SATURDAY NIGHT...WEST WINDS 5 TO 15 KNOTS VEERING NORTH AFTER
MIDNIGHT. WAVES CALM TO 2 FEET.
.SUNDAY...NORTH WINDS 5 TO 15 KNOTS VEERING SOUTHEAST BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
.SUNDAY NIGHT...SOUTHEAST WINDS 5 TO 15 KNOTS BACKING EAST AFTER
MIDNIGHT. WAVES CALM TO 2 FEET.
.MONDAY...EAST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO 20 KNOTS.
WAVES CALM TO 2 FEET.
.TUESDAY...NORTHEAST WINDS 10 TO 20 KNOTS. WAVES BUILDING TO 1 TO
3 FEET...THEN SUBSIDING TO CALM TO 2 FEET.

$$

LSZ263-061000-
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-
955 PM EDT THU MAY 5 2016

.REST OF TONIGHT...SOUTH WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET BUILDING TO 1 TO 3 FEET...THEN SUBSIDING TO CALM TO
2 FEET.
.FRIDAY...SOUTHWEST WINDS 5 TO 15 KNOTS. A SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS LATE. WAVES CALM TO 2 FEET.
.FRIDAY NIGHT...NORTH WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS AFTER MIDNIGHT. A CHANCE OF SHOWERS AND THUNDERSTORMS.
WAVES BUILDING TO 1 TO 3 FEET...THEN SUBSIDING TO CALM TO 2 FEET.
.SATURDAY...NORTH WINDS 5 TO 15 KNOTS BACKING SOUTHWEST BY MID
AFTERNOON. A SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
.SATURDAY NIGHT...WEST WINDS 5 TO 15 KNOTS VEERING NORTH AFTER
MIDNIGHT. WAVES CALM TO 2 FEET.
.SUNDAY...NORTHEAST WINDS 5 TO 15 KNOTS BECOMING SOUTH LESS THAN
10 KNOTS BY MID AFTERNOON. WAVES CALM TO 2 FEET.
.SUNDAY NIGHT...SOUTH WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
.MONDAY...EAST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
.TUESDAY...NORTHEAST WINDS 10 TO 20 KNOTS. WAVES BUILDING TO 1 TO
3 FEET...THEN SUBSIDING TO CALM TO 2 FEET.

$$

LSZ264-061000-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
955 PM EDT THU MAY 5 2016

.REST OF TONIGHT...SOUTH WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.FRIDAY...SOUTH WINDS 5 TO 15 KNOTS. A SLIGHT CHANCE OF SHOWERS
AND THUNDERSTORMS LATE. WAVES CALM TO 2 FEET.
.FRIDAY NIGHT...NORTH WINDS 10 TO 20 KNOTS. A CHANCE OF SHOWERS
AND THUNDERSTORMS. WAVES BUILDING TO 2 TO 4 FEET...THEN SUBSIDING
TO 1 TO 3 FEET.
.SATURDAY...NORTH WINDS 5 TO 15 KNOTS BACKING WEST BY MID
AFTERNOON. A SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS BY MID
AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.SATURDAY NIGHT...WEST WINDS 5 TO 15 KNOTS VEERING NORTH AFTER
MIDNIGHT. WAVES CALM TO 2 FEET.
.SUNDAY...NORTH WINDS 5 TO 15 KNOTS BACKING WEST BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
.SUNDAY NIGHT...SOUTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTH AFTER
MIDNIGHT. WAVES CALM TO 2 FEET.
.MONDAY...SOUTHEAST WINDS 5 TO 15 KNOTS BECOMING EAST 10 TO
20 KNOTS. WAVES CALM TO 2 FEET.
.TUESDAY...EAST WINDS 10 TO 20 KNOTS BACKING NORTHEAST. WAVES
CALM TO 2 FEET.

$$

LSZ265-061000-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
955 PM EDT THU MAY 5 2016

.REST OF TONIGHT...SOUTHEAST WINDS 5 TO 15 KNOTS VEERING SOUTH
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.FRIDAY...SOUTH WINDS 5 TO 15 KNOTS BACKING SOUTHEAST BY MID
AFTERNOON. WAVES BUILDING TO 1 TO 3 FEET.
.FRIDAY NIGHT...SOUTH WINDS 10 TO 20 KNOTS BACKING NORTH AFTER
MIDNIGHT. RAIN SHOWERS LIKELY THROUGH MIDNIGHT...THEN A CHANCE OF
RAIN SHOWERS. A CHANCE OF THUNDERSTORMS. WAVES SUBSIDING TO CALM TO
2 FEET...THEN BUILDING TO 2 TO 4 FEET.
.SATURDAY...NORTH WINDS 10 TO 20 KNOTS BECOMING NORTHWEST 5 TO
15 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
.SATURDAY NIGHT...WEST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
.SUNDAY...NORTH WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
.SUNDAY NIGHT...SOUTH WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
.MONDAY...EAST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
.TUESDAY...EAST WINDS 10 TO 20 KNOTS BECOMING NORTHEAST 5 TO
15 KNOTS. WAVES CALM TO 2 FEET.

$$

LSZ266-061000-
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-
955 PM EDT THU MAY 5 2016

.REST OF TONIGHT...SOUTHEAST WINDS 10 TO 20 KNOTS VEERING SOUTH
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.FRIDAY...SOUTH WINDS 10 TO 20 KNOTS. WAVES BUILDING TO 2 TO
4 FEET.
.FRIDAY NIGHT...SOUTH WINDS 10 TO 20 KNOTS BACKING NORTH AFTER
MIDNIGHT. A CHANCE OF SHOWERS AND THUNDERSTORMS. WAVES SUBSIDING
TO 1 TO 3 FEET...THEN BUILDING TO 2 TO 4 FEET.
.SATURDAY...NORTH WINDS 10 TO 20 KNOTS BACKING NORTHWEST BY MID
AFTERNOON. WAVES BUILDING TO 3 TO 5 FEET...THEN SUBSIDING TO 1 TO
3 FEET.
.SATURDAY NIGHT...WEST WINDS 5 TO 15 KNOTS VEERING NORTHWEST
AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.SUNDAY...NORTH WINDS 5 TO 15 KNOTS BACKING NORTHWEST BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
.SUNDAY NIGHT...WEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST AFTER
MIDNIGHT. WAVES CALM TO 2 FEET.
.MONDAY...SOUTHEAST WINDS 5 TO 15 KNOTS BACKING EAST. WAVES CALM
TO 2 FEET.
.TUESDAY...EAST WINDS 10 TO 20 KNOTS BACKING NORTHEAST. WAVES
CALM TO 2 FEET.

$$

LSZ267-061000-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
955 PM EDT THU MAY 5 2016

.REST OF TONIGHT...SOUTHEAST WINDS 5 TO 15 KNOTS BECOMING SOUTH
10 TO 20 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.FRIDAY...SOUTH WINDS 10 TO 20 KNOTS. WAVES BUILDING TO 1 TO
3 FEET.
.FRIDAY NIGHT...SOUTH WINDS 10 TO 20 KNOTS BACKING NORTH AFTER
MIDNIGHT. A CHANCE OF SHOWERS AND THUNDERSTORMS THROUGH
MIDNIGHT...THEN RAIN SHOWERS LIKELY WITH A CHANCE OF THUNDERSTORMS.
WAVES BUILDING TO 2 TO 4 FEET...THEN SUBSIDING TO 1 TO 3 FEET.
.SATURDAY...NORTH WINDS 15 TO 25 KNOTS BACKING NORTHWEST BY MID
AFTERNOON. WAVES BUILDING TO 3 TO 5 FEET...THEN SUBSIDING TO 2 TO
4 FEET.
.SATURDAY NIGHT...NORTHWEST WINDS 10 TO 20 KNOTS DIMINISHING TO
5 TO 15 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.SUNDAY...NORTHWEST WINDS 5 TO 15 KNOTS BECOMING WEST 10 TO
20 KNOTS BY MID AFTERNOON. WAVES CALM TO 2 FEET.
.SUNDAY NIGHT...WEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.MONDAY...SOUTH WINDS 5 TO 15 KNOTS BACKING EAST. WAVES CALM TO
2 FEET.
.TUESDAY...NORTHEAST WINDS 10 TO 20 KNOTS. WAVES CALM TO 2 FEET.

$$
LSZ261-061000-
MAFOR 0603/
SUPERIOR WEST 11420 15510 11620. CHANCE OF SHOWERS AND
THUNDERSTORMS FRIDAY EVENING. WAVES 1 TO 3 FEET.

SUPERIOR NORTH CENTRAL 11410 11310 11400 14410 11510. CHANCE OF
SHOWERS AND THUNDERSTORMS FRIDAY EVENING. WAVES 1 TO 2 FEET.

SUPERIOR SOUTH CENTRAL 11310 13410 12310 12420. CHANCE OF SHOWERS
AND THUNDERSTORMS LATE FRIDAY EVENING. WAVES 1 TO 3 FEET.

SUPERIOR EAST 12310 12410 11310 11320 12420. WAVES CALM TO 3 FEET
TONIGHT AND FRIDAY. WAVES 2 TO 4 FEET FRIDAY EVENING.

$$

RJT


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