Great Lakes Forecast
Issued by NWS

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249
FZUS63 KMQT 151405
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
1005 AM EDT FRI MAY 15 2015

FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE SUPERIOR

.SYNOPSIS...HIGH PRESSURE OF 30.4 INCHES OVER THE MID ATLANTIC
STATES WILL DRIFT OFF THE EASTERN SEABOARD TODAY WHILE LOW PRESSURE
OF 29.9 INCHES CROSSES THE UPPER GREAT LAKES. THIS LOW WILL SLIDE
TOWARD NEW ENGLAND THROUGH SATURDAY WHILE WEAKENING TO 30.1 INCHES AS
A WEAK 30.1 INCH HIGH BUILDS OVER THE UPPER GREAT LAKES. LOW PRESSURE
OF 29.5 INCHES DEVELOPING OVER THE NORTHERN PLAINS ON SATURDAY WILL
MOVE TO NORTHERN MINNESOTA BY LATE SUNDAY AFTERNOON AND THEN CROSS
LAKE SUPERIOR ON MONDAY. EXPECT THE LOW TO TRACK NORTHEAST OVER
QUEBEC ON TUESDAY WHILE WEAKENING TO 29.8 INCHES. IN THE WAKE OF THE
LOW...HIGH PRESSURE OF 30.5 INCHES WILL EXPAND FROM CENTRAL CANADA TO
THE WESTERN GREAT LAKES REGION THROUGH WEDNESDAY.

LSZ162-152215-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
1005 AM EDT FRI MAY 15 2015

.REST OF TODAY...NORTHEAST WINDS 5 TO 15 KNOTS BECOMING SOUTH
LESS THAN 10 KNOTS BY MID AFTERNOON. WAVES CALM TO 2 FEET.
.TONIGHT...EAST WINDS LESS THAN 10 KNOTS BECOMING NORTHEAST 5 TO
15 KNOTS AFTER MIDNIGHT. PATCHY FOG. WAVES CALM TO 2 FEET.
.SATURDAY...NORTHEAST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS BY MID AFTERNOON. WAVES BUILDING TO 2 TO 4 FEET.
.SATURDAY NIGHT...NORTHEAST WINDS 10 TO 20 KNOTS VEERING EAST
AFTER MIDNIGHT. A CHANCE OF RAIN SHOWERS AND A SLIGHT CHANCE OF
THUNDERSTORMS. PATCHY FOG AFTER MIDNIGHT. WAVES SUBSIDING TO CALM
TO 2 FEET.
.SUNDAY...SOUTHEAST WINDS 10 TO 20 KNOTS. AREAS OF FOG. SHOWERS
AND THUNDERSTORMS LIKELY. WAVES CALM TO 2 FEET.
.SUNDAY NIGHT...SOUTH WINDS 10 TO 20 KNOTS BECOMING WEST 15 TO
25 KNOTS AFTER MIDNIGHT. AREAS OF FOG THROUGH MIDNIGHT. RAIN
SHOWERS LIKELY AND A CHANCE OF THUNDERSTORMS. WAVES CALM TO
2 FEET.
.MONDAY...NORTH WINDS 20 TO 30 KNOTS DIMINISHING TO 10 TO
20 KNOTS. A CHANCE OF RAIN SHOWERS...POSSIBLY MIXED WITH SNOW.
WAVES BUILDING TO 1 TO 3 FEET...THEN SUBSIDING TO CALM TO 2 FEET.
.TUESDAY...WEST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.

$$

LSZ263-152215-
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-
1005 AM EDT FRI MAY 15 2015

.REST OF TODAY...EAST WINDS 5 TO 15 KNOTS BECOMING WEST LESS THAN
10 KNOTS BY MID AFTERNOON. PATCHY FOG THROUGH EARLY AFTERNOON. AREAS
OF DRIZZLE AND ISOLATED RAIN SHOWERS THROUGH LATE MORNING. WAVES
CALM TO 2 FEET.
.TONIGHT...SOUTHWEST WINDS LESS THAN 10 KNOTS BACKING EAST AFTER
MIDNIGHT. PATCHY FOG. WAVES CALM TO 2 FEET.
.SATURDAY...EAST WINDS 5 TO 15 KNOTS INCREASING TO 15 TO 25 KNOTS
BY MID AFTERNOON. WAVES BUILDING TO 1 TO 3 FEET.
.SATURDAY NIGHT...EAST WINDS 15 TO 25 KNOTS BECOMING SOUTHEAST
10 TO 20 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN SHOWERS AND A
SLIGHT CHANCE OF THUNDERSTORMS. PATCHY FOG AFTER MIDNIGHT. WAVES
1 TO 3 FEET.
.SUNDAY...SOUTHEAST WINDS 10 TO 20 KNOTS VEERING SOUTH BY MID
AFTERNOON. PATCHY FOG. A CHANCE OF SHOWERS AND THUNDERSTORMS
THROUGH EARLY AFTERNOON...THEN SHOWERS AND THUNDERSTORMS LIKELY.
WAVES 1 TO 3 FEET.
.SUNDAY NIGHT...SOUTH WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS AFTER MIDNIGHT. PATCHY FOG. RAIN SHOWERS LIKELY. WAVES
1 TO 3 FEET.
.MONDAY...NORTH WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS. A CHANCE OF RAIN SHOWERS...POSSIBLY MIXED WITH SNOW.
WAVES BUILDING TO 4 TO 7 FEET...THEN SUBSIDING TO 1 TO 3 FEET.
.TUESDAY...WEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS. WAVES SUBSIDING TO CALM TO 2 FEET.

$$

LSZ264-152215-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
1005 AM EDT FRI MAY 15 2015

.REST OF TODAY...EAST WINDS 5 TO 15 KNOTS VEERING SOUTHEAST BY
MID AFTERNOON. AREAS OF DRIZZLE AND ISOLATED RAIN SHOWERS THROUGH
LATE MORNING. WAVES 1 TO 3 FEET SUBSIDING TO CALM TO 2 FEET.
.TONIGHT...SOUTHWEST WINDS LESS THAN 10 KNOTS VEERING WEST AFTER
MIDNIGHT. WAVES CALM TO 2 FEET.
.SATURDAY...SOUTHEAST WINDS 5 TO 15 KNOTS BECOMING EAST 10 TO
20 KNOTS BY MID AFTERNOON. WAVES BUILDING TO 1 TO 3 FEET.
.SATURDAY NIGHT...EAST WINDS 15 TO 25 KNOTS BECOMING SOUTHEAST
10 TO 20 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN SHOWERS AND A
SLIGHT CHANCE OF THUNDERSTORMS. PATCHY FOG AFTER MIDNIGHT. WAVES
BUILDING TO 2 TO 4 FEET.
.SUNDAY...SOUTHEAST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO
30 KNOTS BY MID AFTERNOON. PATCHY FOG. A CHANCE OF SHOWERS AND
THUNDERSTORMS THROUGH EARLY AFTERNOON...THEN SHOWERS AND
THUNDERSTORMS LIKELY. WAVES 2 TO 4 FEET.
.SUNDAY NIGHT...SOUTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS AFTER MIDNIGHT. PATCHY FOG. A CHANCE OF RAIN SHOWERS
THROUGH MIDNIGHT...THEN RAIN SHOWERS LIKELY. WAVES SUBSIDING TO 1 TO
3 FEET.
.MONDAY...NORTH WINDS 15 TO 25 KNOTS INCREASING TO 20 TO
30 KNOTS. A CHANCE OF RAIN AND SNOW SHOWERS. WAVES BUILDING TO
6 TO 9 FEET...THEN SUBSIDING TO 1 TO 3 FEET.
.TUESDAY...NORTHWEST WINDS 10 TO 20 KNOTS BACKING WEST. WAVES
SUBSIDING TO CALM TO 2 FEET.

$$

LSZ265-152215-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
1005 AM EDT FRI MAY 15 2015

.REST OF TODAY...EAST WINDS 5 TO 15 KNOTS. SCATTERED RAIN SHOWERS
AND AREAS OF DRIZZLE THROUGH LATE MORNING. WAVES 1 TO 3 FEET
SUBSIDING TO CALM TO 2 FEET.
.TONIGHT...EAST WINDS LESS THAN 10 KNOTS VEERING SOUTH AFTER
MIDNIGHT. WAVES CALM TO 2 FEET.
.SATURDAY...EAST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO 20 KNOTS
BY MID AFTERNOON. WAVES CALM TO 2 FEET.
.SATURDAY NIGHT...SOUTHEAST WINDS 15 TO 25 KNOTS. PATCHY FOG
AFTER MIDNIGHT. A SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS
AFTER MIDNIGHT. WAVES BUILDING TO 1 TO 3 FEET.
.SUNDAY...SOUTHEAST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO
30 KNOTS BY MID AFTERNOON. PATCHY FOG. A CHANCE OF SHOWERS AND
THUNDERSTORMS. WAVES BUILDING TO 2 TO 4 FEET.
.SUNDAY NIGHT...SOUTH WINDS 15 TO 25 KNOTS. PATCHY FOG. A CHANCE
OF RAIN SHOWERS. WAVES SUBSIDING TO CALM TO 2 FEET.
.MONDAY...NORTHWEST WINDS 20 TO 30 KNOTS. PATCHY FOG. A CHANCE OF
RAIN SHOWERS. WAVES BUILDING TO 6 TO 9 FEET...THEN SUBSIDING TO
2 TO 4 FEET.
.TUESDAY...NORTHWEST WINDS 15 TO 25 KNOTS BECOMING WEST 10 TO
20 KNOTS. WAVES SUBSIDING TO CALM TO 2 FEET.

$$

LSZ266-152215-
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-
1005 AM EDT FRI MAY 15 2015

.REST OF TODAY...EAST WINDS 5 TO 15 KNOTS VEERING SOUTHEAST BY
MID AFTERNOON. RAIN LIKELY THROUGH LATE MORNING...THEN AREAS OF
DRIZZLE THROUGH MID AFTERNOON. WAVES 1 TO 3 FEET SUBSIDING TO CALM
TO 2 FEET.
.TONIGHT...SOUTHWEST WINDS LESS THAN 10 KNOTS. PATCHY FOG AFTER
MIDNIGHT. WAVES CALM TO 2 FEET.
.SATURDAY...EAST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO 20 KNOTS
BY MID AFTERNOON. WAVES CALM TO 2 FEET.
.SATURDAY NIGHT...EAST WINDS 10 TO 20 KNOTS BECOMING SOUTHEAST
15 TO 25 KNOTS AFTER MIDNIGHT. PATCHY FOG AFTER MIDNIGHT. A
SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS AFTER MIDNIGHT. WAVES
BUILDING TO 2 TO 4 FEET.
.SUNDAY...SOUTHEAST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO
30 KNOTS BY MID AFTERNOON. PATCHY FOG. A CHANCE OF SHOWERS AND
THUNDERSTORMS. WAVES 2 TO 4 FEET.
.SUNDAY NIGHT...SOUTH WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS AFTER MIDNIGHT. PATCHY FOG. A CHANCE OF RAIN SHOWERS.
WAVES SUBSIDING TO 1 TO 3 FEET.
.MONDAY...NORTHWEST WINDS 20 TO 30 KNOTS BECOMING NORTH GALES TO
35 KNOTS. PATCHY FOG. A CHANCE OF RAIN SHOWERS. WAVES BUILDING TO
8 TO 11 FEET...THEN SUBSIDING TO 3 TO 6 FEET.
.TUESDAY...NORTHWEST WINDS 15 TO 25 KNOTS BECOMING WEST 10 TO
20 KNOTS. WAVES SUBSIDING TO CALM TO 2 FEET.

$$

LSZ267-152215-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
1005 AM EDT FRI MAY 15 2015

.REST OF TODAY...SOUTHEAST WINDS 10 TO 20 KNOTS DIMINISHING TO
5 TO 15 KNOTS BY MID AFTERNOON. RAIN LIKELY THROUGH LATE MORNING...
THEN AREAS OF DRIZZLE...ISOLATED RAIN SHOWERS AND PATCHY FOG THROUGH
MID AFTERNOON. WAVES 1 TO 3 FEET SUBSIDING TO CALM TO 2 FEET.
.TONIGHT...SOUTH WINDS 5 TO 15 KNOTS VEERING WEST AFTER MIDNIGHT.
PATCHY FOG AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.SATURDAY...SOUTHEAST WINDS LESS THAN 10 KNOTS BECOMING EAST
10 TO 20 KNOTS BY MID AFTERNOON. WAVES CALM TO 2 FEET.
.SATURDAY NIGHT...EAST WINDS 10 TO 20 KNOTS BECOMING SOUTHEAST
15 TO 25 KNOTS AFTER MIDNIGHT. PATCHY FOG AFTER MIDNIGHT. A
SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS AFTER MIDNIGHT. WAVES
BUILDING TO 1 TO 3 FEET.
.SUNDAY...SOUTHEAST WINDS 20 TO 30 KNOTS. PATCHY FOG. A CHANCE OF
SHOWERS AND THUNDERSTORMS. WAVES BUILDING TO 2 TO 4 FEET...THEN
SUBSIDING TO 1 TO 3 FEET.
.SUNDAY NIGHT...SOUTH WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS AFTER MIDNIGHT. PATCHY FOG. RAIN SHOWERS LIKELY THROUGH
MIDNIGHT...THEN A CHANCE OF RAIN SHOWERS. WAVES BUILDING TO 2 TO 4
FEET...THEN SUBSIDING TO 1 TO 3 FEET.
.MONDAY...WEST WINDS 15 TO 25 KNOTS BECOMING NORTHWEST 20 TO
30 KNOTS. PATCHY FOG. A CHANCE OF RAIN SHOWERS. WAVES BUILDING TO
8 TO 11 FEET...THEN SUBSIDING TO 3 TO 6 FEET.
.TUESDAY...NORTHWEST WINDS 20 TO 30 KNOTS DIMINISHING TO 10 TO
20 KNOTS. WAVES SUBSIDING TO CALM TO 2 FEET.

$$
LSZ261-152215-
MAFOR 1515/
SUPERIOR WEST 12100 11400 11300 12200 11103 11210. WAVES 1 TO 2
FEET.

SUPERIOR NORTH CENTRAL 11210 11300 11400 14500 11200. SCATTERED
RAIN SHOWERS THROUGH LATE THIS MORNING. WAVES CALM TO 3 FEET.

SUPERIOR SOUTH CENTRAL 11310 11300 12200 11300 11400 11300 11200.
SCATTERED RAIN SHOWERS THROUGH LATE THIS MORNING. WAVES CALM TO 3
FEET.

SUPERIOR EAST 11210 11315 11305 11400 11500 11600 11500 11300.
SCATTERED RAIN SHOWERS WITH AREAS OF DRIZZLE THROUGH THIS AFTERNOON.
WAVES CALM TO 3 FEET.

$$

PETRO



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