Great Lakes Forecast
Issued by NWS

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000
FZUS63 KMQT 051330
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
930 AM EDT THU MAY 5 2016

FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE SUPERIOR

.SYNOPSIS...A 30.1 INCH HIGH PRESSURE RIDGE OVER CENTRAL LAKE
SUPERIOR WILL DRIFT EASTWARD TO LAKE HURON THROUGH TONIGHT. LOW
PRESSURE OF 29.6 INCHES OVER SOUTH CENTRAL CANADA TONIGHT WILL LIFT
ACROSS NORTHERN ONTARIO TO JUST SOUTH OF JAMES BAY ON FRIDAY NIGHT AT
29.5 INCHES. THIS LOW WILL PUSH A 29.7 INCH TROUGH ACROSS LAKE
SUPERIOR FRIDAY EVENING AHEAD OF 30.1 HIGH PRESSURE BUILDING OVER THE
NORTHERN PLAINS ON SATURDAY. 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.

LSZ162-052130-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
930 AM EDT THU MAY 5 2016 /830 AM CDT THU MAY 5 2016/

.REST OF TODAY...SOUTHWEST WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
.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 BY MID AFTERNOON. WAVES CALM TO 2 FEET.
.FRIDAY NIGHT...NORTH WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS AFTER MIDNIGHT. RAIN SHOWERS LIKELY AND A SLIGHT CHANCE
OF THUNDERSTORMS THROUGH MIDNIGHT. WAVES CALM TO 2 FEET.
.SATURDAY...NORTHWEST WINDS 5 TO 15 KNOTS BACKING WEST BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
.SATURDAY NIGHT...WEST WINDS 5 TO 15 KNOTS VEERING NORTHWEST
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.SUNDAY...SOUTHEAST WINDS 5 TO 15 KNOTS VEERING SOUTH. WAVES CALM
TO 2 FEET.
.MONDAY...EAST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.

$$

LSZ263-052130-
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-
930 AM EDT THU MAY 5 2016

.REST OF TODAY...SOUTHWEST WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET BUILDING TO 1 TO 3 FEET.
.TONIGHT...SOUTH WINDS 5 TO 15 KNOTS. WAVES SUBSIDING TO CALM TO
2 FEET.
.FRIDAY...SOUTHWEST WINDS 5 TO 15 KNOTS. A SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS BY MID AFTERNOON. WAVES CALM TO 2 FEET.
.FRIDAY NIGHT...NORTH WINDS 5 TO 15 KNOTS. RAIN SHOWERS LIKELY
AND A SLIGHT CHANCE OF THUNDERSTORMS THROUGH MIDNIGHT...THEN A
SLIGHT CHANCE OF RAIN SHOWERS AFTER MIDNIGHT. WAVES BUILDING TO
1 TO 3 FEET...THEN SUBSIDING TO CALM TO 2 FEET.
.SATURDAY...NORTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST 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 SOUTH. WAVES CALM TO
2 FEET.
.MONDAY...EAST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.

$$

LSZ264-052130-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
930 AM EDT THU MAY 5 2016

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

$$

LSZ265-052130-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
930 AM EDT THU MAY 5 2016

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

$$

LSZ266-052130-
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-
930 AM EDT THU MAY 5 2016

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

$$

LSZ267-052130-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
930 AM EDT THU MAY 5 2016

.REST OF TODAY...NORTH WINDS 5 TO 15 KNOTS BACKING WEST BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
.TONIGHT...SOUTHEAST WINDS 5 TO 15 KNOTS. 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 VEERING NORTHWEST
AFTER MIDNIGHT. A CHANCE OF RAIN SHOWERS THROUGH MIDNIGHT. A
SLIGHT CHANCE OF THUNDERSTORMS. RAIN SHOWERS LIKELY AFTER
MIDNIGHT. WAVES BUILDING TO 2 TO 4 FEET...THEN SUBSIDING TO 1 TO
3 FEET.
.SATURDAY...NORTHWEST WINDS 15 TO 25 KNOTS. WAVES BUILDING TO
3 TO 5 FEET...THEN SUBSIDING TO 2 TO 4 FEET.
.SATURDAY NIGHT...NORTHWEST WINDS 10 TO 20 KNOTS VEERING NORTH
AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.SUNDAY...NORTHWEST WINDS 10 TO 20 KNOTS BACKING WEST. WAVES CALM
TO 2 FEET.
.MONDAY...SOUTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTH. WAVES CALM
TO 2 FEET.

$$
LSZ261-052130-
MAFOR 0515/
SUPERIOR WEST 12510 14410 12500. WAVES 1 TO 2 FEET.

SUPERIOR NORTH CENTRAL 12510 13410 12310 11410. WAVES 1 TO 3
FEET.

SUPERIOR SOUTH CENTRAL 11600 14310 13410. WAVES 1 TO 2 FEET.

SUPERIOR EAST 11700 12500 11300 12310 12410. WAVES CALM TO 3 FEET.

$$

JLB


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