Great Lakes Forecast
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000
FZUS63 KMQT 070157
GLFLS

OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
957 PM EDT WED MAY 6 2015

FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE SUPERIOR

.SYNOPSIS...30.2 INCH HIGH PRESSURE OVER THE LOWER GREAT LAKES WILL
DRIFT EAST...REACHING THE WESTERN ATLANTIC BY THURSDAY EVENING.
MEANWHILE...A 29.6 LOW PRESSURE TROUGH WILL SHIFT EAST ACROSS THE
PLAINS THROUGH THURSDAY. EXPECT A 29.5 INCH LOW PRESSURE CENTER
EMERGING FROM THIS TROUGH TO MOVE NORTHEAST INTO NORTHERN ONTARIO
THURSDAY. AS THE LOW TRACKS INTO QUEBEC FRIDAY...IT WILL DRAG A COLD
FRONT ACROSS THE UPPER GREAT LAKES. IN ITS WAKE...A 30.4 INCH HIGH
PRESSURE WILL BUILD OVER SOUTH CENTRAL CANADA FRIDAY AND THEN DRIFT
OVER FAR NORTHERN ONTARIO LATE SATURDAY THROUGH MONDAY. A 29.6 INCH
LOW PRESSURE ORGANIZING OVER SOUTHEAST COLORADO SATURDAY NIGHT WILL
WEAKEN TO 29.7 INCHES AT IT MOVES NORTHEAST...REACHING SOUTHERN
WISCONSIN MONDAY.

LSZ162-071000-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
957 PM EDT WED MAY 6 2015

.REST OF TONIGHT...NORTHEAST WINDS 10 TO 20 KNOTS VEERING EAST
AFTER MIDNIGHT. A SLIGHT CHANCE OF RAIN SHOWERS. WAVES 1 TO
3 FEET SUBSIDING TO CALM TO 2 FEET.
.THURSDAY...EAST WINDS 10 TO 20 KNOTS VEERING SOUTH BY MID
AFTERNOON. A CHANCE OF RAIN SHOWERS. A CHANCE OF THUNDERSTORMS BY
MID AFTERNOON. WAVES BUILDING TO 2 TO 4 FEET...THEN SUBSIDING TO
CALM TO 2 FEET.
.THURSDAY NIGHT...SOUTH WINDS 10 TO 20 KNOTS BECOMING SOUTHWEST
5 TO 15 KNOTS AFTER MIDNIGHT. PATCHY FOG. SHOWERS LIKELY THROUGH
MIDNIGHT. A CHANCE OF THUNDERSTORMS. A CHANCE OF SHOWERS AFTER
MIDNIGHT. WAVES CALM TO 2 FEET.
.FRIDAY...WEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO 15 KNOTS
BY MID AFTERNOON. PATCHY FOG THROUGH EARLY AFTERNOON. A CHANCE OF
RAIN SHOWERS THROUGH EARLY AFTERNOON. WAVES CALM TO 2 FEET.
.FRIDAY NIGHT...NORTH WINDS 5 TO 15 KNOTS BECOMING NORTHEAST
10 TO 20 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.SATURDAY...NORTHEAST WINDS 10 TO 20 KNOTS BECOMING EAST 5 TO
15 KNOTS BY MID AFTERNOON. WAVES CALM TO 2 FEET.
.SATURDAY NIGHT...NORTHEAST WINDS 5 TO 15 KNOTS INCREASING TO
10 TO 20 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.SUNDAY...NORTHEAST WINDS 15 TO 25 KNOTS. A CHANCE OF RAIN
SHOWERS. WAVES BUILDING TO 1 TO 3 FEET...THEN SUBSIDING TO CALM
TO 2 FEET.
.MONDAY...NORTHEAST WINDS 20 TO 30 KNOTS BECOMING NORTH 15 TO
25 KNOTS. A CHANCE OF RAIN SHOWERS. WAVES BUILDING TO 2 TO
4 FEET...THEN SUBSIDING TO CALM TO 2 FEET.

$$

LSZ263-071000-
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-
957 PM EDT WED MAY 6 2015

.REST OF TONIGHT...SOUTHEAST WINDS 5 TO 15 KNOTS VEERING SOUTH
AFTER MIDNIGHT. A SLIGHT CHANCE OF RAIN SHOWERS. WAVES 1 TO
3 FEET.
.THURSDAY...SOUTHEAST WINDS 10 TO 20 KNOTS BECOMING SOUTH 15 TO
25 KNOTS BY MID AFTERNOON. A CHANCE OF RAIN SHOWERS. A SLIGHT
CHANCE OF THUNDERSTORMS BY MID AFTERNOON. WAVES 1 TO 3 FEET.
.THURSDAY NIGHT...SOUTH WINDS 10 TO 20 KNOTS BECOMING SOUTHWEST
5 TO 15 KNOTS AFTER MIDNIGHT. PATCHY FOG. RAIN SHOWERS LIKELY
THROUGH MIDNIGHT. A SLIGHT CHANCE OF THUNDERSTORMS. A CHANCE OF
RAIN SHOWERS AFTER MIDNIGHT. WAVES 1 TO 3 FEET.
.FRIDAY...WEST WINDS 5 TO 15 KNOTS. PATCHY FOG THROUGH EARLY
AFTERNOON. A CHANCE OF RAIN SHOWERS. WAVES SUBSIDING TO CALM TO
2 FEET.
.FRIDAY NIGHT...NORTH WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.SATURDAY...NORTHEAST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS BY MID AFTERNOON. WAVES CALM TO 2 FEET.
.SATURDAY NIGHT...NORTHEAST WINDS 5 TO 15 KNOTS BECOMING NORTH
10 TO 20 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.SUNDAY...NORTHEAST WINDS 15 TO 25 KNOTS. A CHANCE OF RAIN
SHOWERS. WAVES BUILDING TO 1 TO 3 FEET...THEN SUBSIDING TO CALM
TO 2 FEET.
.MONDAY...NORTHEAST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS. A CHANCE OF RAIN SHOWERS. WAVES BUILDING TO 2 TO
4 FEET...THEN SUBSIDING TO CALM TO 2 FEET.

$$

LSZ264-071000-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
957 PM EDT WED MAY 6 2015

.REST OF TONIGHT...SOUTHEAST WINDS 10 TO 20 KNOTS. A SLIGHT
CHANCE OF RAIN SHOWERS. WAVES 1 TO 3 FEET.
.THURSDAY...SOUTHEAST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS BY MID AFTERNOON. A CHANCE OF RAIN SHOWERS. A SLIGHT
CHANCE OF THUNDERSTORMS BY MID AFTERNOON. WAVES BUILDING TO 2 TO
4 FEET.
.THURSDAY NIGHT...SOUTH WINDS 10 TO 20 KNOTS. RAIN SHOWERS LIKELY
THROUGH MIDNIGHT. A SLIGHT CHANCE OF THUNDERSTORMS. A CHANCE OF
RAIN SHOWERS AFTER MIDNIGHT. PATCHY FOG AFTER MIDNIGHT. WAVES
SUBSIDING TO 1 TO 3 FEET.
.FRIDAY...SOUTHWEST WINDS 10 TO 20 KNOTS BECOMING NORTHWEST 5 TO
15 KNOTS BY MID AFTERNOON. PATCHY FOG. A SLIGHT CHANCE OF RAIN
SHOWERS. WAVES SUBSIDING TO CALM TO 2 FEET...THEN BUILDING TO
1 TO 3 FEET.
.FRIDAY NIGHT...NORTH WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.SATURDAY...NORTH WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS BY MID AFTERNOON. WAVES CALM TO 2 FEET.
.SATURDAY NIGHT...NORTH WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.SUNDAY...NORTHEAST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS. WAVES CALM TO 2 FEET.
.MONDAY...NORTHEAST WINDS 15 TO 25 KNOTS. A CHANCE OF RAIN
SHOWERS. WAVES BUILDING TO 1 TO 3 FEET...THEN SUBSIDING TO CALM
TO 2 FEET.

$$

LSZ265-071000-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
957 PM EDT WED MAY 6 2015

.REST OF TONIGHT...SOUTHEAST WINDS 5 TO 15 KNOTS VEERING SOUTH
AFTER MIDNIGHT. WAVES 1 TO 3 FEET.
.THURSDAY...SOUTHEAST WINDS 15 TO 25 KNOTS. A SLIGHT CHANCE OF
RAIN SHOWERS. A SLIGHT CHANCE OF THUNDERSTORMS BY MID AFTERNOON.
WAVES BUILDING TO 2 TO 4 FEET.
.THURSDAY NIGHT...SOUTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS AFTER MIDNIGHT. A CHANCE OF SHOWERS. A SLIGHT CHANCE OF
THUNDERSTORMS AFTER MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET.
.FRIDAY...WEST WINDS 10 TO 20 KNOTS VEERING NORTHWEST BY MID
AFTERNOON. PATCHY FOG. A SLIGHT CHANCE OF THUNDERSTORMS THROUGH
EARLY AFTERNOON. A SLIGHT CHANCE OF RAIN SHOWERS. WAVES SUBSIDING
TO CALM TO 2 FEET.
.FRIDAY NIGHT...NORTHWEST WINDS 5 TO 15 KNOTS BECOMING NORTH
10 TO 20 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.SATURDAY...NORTH WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS BY MID AFTERNOON. WAVES BUILDING TO 1 TO 3 FEET...THEN
SUBSIDING TO CALM TO 2 FEET.
.SATURDAY NIGHT...NORTH WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
.SUNDAY...NORTHEAST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS. A CHANCE OF RAIN SHOWERS. WAVES CALM TO 2 FEET.
.MONDAY...NORTHEAST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS. A CHANCE OF RAIN SHOWERS. WAVES BUILDING TO 1 TO
3 FEET...THEN SUBSIDING TO CALM TO 2 FEET.

$$

LSZ266-071000-
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-
957 PM EDT WED MAY 6 2015

.REST OF TONIGHT...SOUTHEAST WINDS 10 TO 20 KNOTS VEERING SOUTH
AFTER MIDNIGHT. WAVES 1 TO 3 FEET.
.THURSDAY...SOUTH WINDS 15 TO 25 KNOTS INCREASING TO 20 TO
30 KNOTS BY MID AFTERNOON. A SLIGHT CHANCE OF RAIN SHOWERS. WAVES
BUILDING TO 3 TO 5 FEET.
.THURSDAY NIGHT...SOUTH WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN SHOWERS. A SLIGHT
CHANCE OF THUNDERSTORMS AFTER MIDNIGHT. WAVES SUBSIDING TO 1 TO
3 FEET.
.FRIDAY...SOUTHWEST WINDS 10 TO 20 KNOTS VEERING NORTHWEST BY MID
AFTERNOON. PATCHY FOG. A SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. WAVES SUBSIDING TO CALM TO 2 FEET...THEN BUILDING
TO 1 TO 3 FEET.
.FRIDAY NIGHT...NORTHWEST WINDS 10 TO 20 KNOTS VEERING NORTH
AFTER MIDNIGHT. WAVES 1 TO 3 FEET.
.SATURDAY...NORTH WINDS 10 TO 20 KNOTS. WAVES 1 TO 3 FEET.
.SATURDAY NIGHT...NORTH WINDS 10 TO 20 KNOTS. WAVES SUBSIDING TO
CALM TO 2 FEET.
.SUNDAY...NORTH WINDS 15 TO 25 KNOTS VEERING NORTHEAST. A CHANCE
OF RAIN SHOWERS. WAVES BUILDING TO 1 TO 3 FEET.
.MONDAY...NORTHEAST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS. A CHANCE OF RAIN SHOWERS. WAVES SUBSIDING TO CALM TO
2 FEET.

$$

LSZ267-071000-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
957 PM EDT WED MAY 6 2015

.REST OF TONIGHT...SOUTHEAST WINDS 10 TO 20 KNOTS. WAVES CALM TO
2 FEET.
.THURSDAY...SOUTHEAST WINDS 15 TO 25 KNOTS VEERING SOUTH BY MID
AFTERNOON. A SLIGHT CHANCE OF RAIN SHOWERS BY MID AFTERNOON.
WAVES BUILDING TO 2 TO 4 FEET.
.THURSDAY NIGHT...SOUTH WINDS 15 TO 25 KNOTS. A CHANCE OF RAIN
SHOWERS. A SLIGHT CHANCE OF THUNDERSTORMS AFTER MIDNIGHT. PATCHY
FOG AFTER MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET.
.FRIDAY...SOUTH WINDS 10 TO 20 KNOTS VEERING WEST BY MID
AFTERNOON. PATCHY FOG. A CHANCE OF RAIN SHOWERS AND A SLIGHT
CHANCE OF THUNDERSTORMS. WAVES SUBSIDING TO CALM TO 2 FEET.
.FRIDAY NIGHT...NORTHWEST WINDS 5 TO 15 KNOTS VEERING NORTH AFTER
MIDNIGHT. PATCHY FOG. WAVES BUILDING TO 1 TO 3 FEET.
.SATURDAY...NORTH 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.
.SATURDAY NIGHT...NORTH WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
.SUNDAY...NORTH WINDS 15 TO 25 KNOTS VEERING NORTHEAST. A CHANCE
OF RAIN SHOWERS. WAVES CALM TO 2 FEET.
.MONDAY...NORTHEAST WINDS 15 TO 25 KNOTS. A CHANCE OF RAIN
SHOWERS. WAVES CALM TO 2 FEET.

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

$$
LSZ261-071000-
MAFOR 0703/
SUPERIOR WEST 11210 12310 13320 11420 11426. CHANCE OF SHOWERS
AND THUNDERSTORMS THURSDAY AND THURSDAY EVENING. WAVES 1 TO 3 FEET.

SUPERIOR NORTH CENTRAL 12310 11320 14330 11420. CHANCE OF SHOWERS
AND SLIGHT CHANCE OF THUNDERSTORMS THURSDAY EVENING. WAVES 1 TO 4
FEET.

SUPERIOR SOUTH CENTRAL 11320 11410 11420 11430 11330 12340 11440.
WAVES 2 TO 4 FEET.

SUPERIOR EAST 13310 11320 11330 11430 11340 11440. WAVES 1 TO 4
FEET.

$$

JS



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