Great Lakes Forecast
Issued by NWS

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FZUS63 KLOT 211946
GLFLM

OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
246 PM CDT MON JUL 21 2014

FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE MICHIGAN.

WAVES ARE PROVIDED AS A RANGE OF SIGNIFICANT WAVE HEIGHTS...WHICH
IS THE AVERAGE HEIGHT OF THE HIGHEST 1/3 OF THE WAVES...ALONG
WITH THE AVERAGE HEIGHT OF THE HIGHEST 10 PERCENT OF THE WAVES
WHICH WILL OCCASIONALLY BE ENCOUNTERED.

.SYNOPSIS...A 30.1 INCH LOW EXTENDS FROM THE ATLANTIC SEABOARD
THROUGH THE EASTERN GREAT LAKES WHILE A 29.7 INCH LOW IS OVER THE
DAKOTAS. THE LOW WILL DEEPEN TO 29.6 INCHES AS IT MOVES OVER LAKE
SUPERIOR TUESDAY AND IT WILL ALSO DRAG A COLD FRONT ACROSS THE
LAKE TUESDAY EVENING. THE LOW WILL DEEPEN TO 29.2 INCHES AS IT
MOVES OVER NEWFOUNDLAND WEDNESDAY EVENING. MEANWHILE HIGH PRESSURE
AVERAGING 30.2 INCHES WILL BUILD OVER THE PLAINS TUESDAY NIGHT
INTO WEDNESDAY...AND THEN SPREAD OVER THE LAKE WEDNESDAY NIGHT.
THE HIGH WILL THEN SLOWLY WEAKEN AND SHIFT SOUTHEAST THROUGH
FRIDAY NIGHT.

LMZ261-362-364-366-563-565-567-868-220345-
LAKE MICHIGAN FROM SEUL CHOIX POINT TO ROCK ISLAND PASSAGE 5 NM
OFFSHORE TO MID LAKE-
LAKE MICHIGAN SOUTH OF A LINE FROM SEUL CHOIX POINT TO THE
MACKINAC BRIDGE AND NORTH OF A LINE FROM CHARLEVOIX MI TO SOUTH
FOX ISLAND 5 NM OFFSHORE-
LAKE MICHIGAN FROM CHARLEVOIX TO POINT BETSIE MI 5 NM OFFSHORE TO
MID LAKE-
LAKE MICHIGAN FROM POINT BETSIE TO MANISTEE MI 5 NM OFFSHORE TO
MID LAKE-
LAKE MICHIGAN FROM ROCK ISLAND PASSAGE TO STURGEON BAY WI-
LAKE MICHIGAN FROM STURGEON BAY TO TWO RIVERS WI 5 NM OFFSHORE TO
MID LAKE-
LAKE MICHIGAN FROM TWO RIVERS TO SHEBOYGAN WI 5 NM OFFSHORE TO
MID LAKE-
LAKE MICHIGAN FROM PENTWATER TO MANISTEE MI 5 NM OFFSHORE TO MID
LAKE-
246 PM CDT MON JUL 21 2014

SHEBOYGAN WI TO PENTWATER MI NORTH

.TONIGHT...SOUTH WINDS 15 TO 25 KT. PATCHY FOG. WAVES 3 TO 5 FT
OCCASIONALLY TO 7 FT.
.TUESDAY...SOUTHWEST WINDS TO 30 KT BECOMING SOUTHWEST LATE IN THE
AFTERNOON. OCCASIONAL GALES TO 35 KT ARE POSSIBLE IN THE
AFTERNOON. PATCHY FOG IN THE MORNING. CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE MORNING...THEN SHOWERS AND THUNDERSTORMS
LIKELY IN THE AFTERNOON. WAVES BUILDING TO 5 TO 8 FT OCCASIONALLY
TO 10 FT.
.TUESDAY NIGHT...WEST WINDS 15 TO 25 KT VEERING TO NORTHWEST TO
30 KT. CHANCE OF SHOWERS AND THUNDERSTORMS. WAVES 4 TO 7 FT
OCCASIONALLY TO 9 FT.
.WEDNESDAY...NORTH WINDS 15 TO 25 KT. WAVES 4 TO 6 FT
OCCASIONALLY TO 8 FT.
.WEDNESDAY NIGHT...NORTH WINDS 10 TO 20 KT DIMINISHING TO 5 TO 10
KT AFTER MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FT.
.THURSDAY...NORTHWEST WINDS 5 TO 10 KT BECOMING WEST 10 TO 15 KT.
WAVES 1 TO 3 FT.
.THURSDAY NIGHT...VARIABLE WINDS 5 TO 10 KT BECOMING WEST LATE.
WAVES 1 TO 2 FT.
.FRIDAY...SOUTHWEST WINDS 5 TO 10 KT INCREASING TO 10 TO 15 KT.
WAVES 1 TO 2 FT.
.SATURDAY...SOUTH WINDS 10 TO 15 KT. CHANCE OF SHOWERS AND
THUNDERSTORMS. WAVES 1 TO 3 FT.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-220345-
LAKE MICHIGAN FROM MICHIGAN CITY IN TO ST. JOSEPH MI 5 NM
OFFSHORE TO MID LAKE-
LAKE MICHIGAN FROM SHEBOYGAN TO PORT WASHINGTON WI 5 NM OFFSHORE
TO MID LAKE-
LAKE MICHIGAN FROM PORT WASHINGTON TO NORTH POINT LIGHT WI 5 NM
OFFSHORE TO MID LAKE-
LAKE MICHIGAN FROM NORTH POINT LIGHT TO WIND POINT WI 5 NM
OFFSHORE TO MID LAKE-
LAKE MICHIGAN FROM WIND POINT WI TO WINTHROP HARBOR IL 5 NM
OFFSHORE TO MID LAKE-
LAKE MICHIGAN FROM WINTHROP HARBOR TO WILMETTE HARBOR IL 5 NM
OFFSHORE TO MID LAKE-
LAKE MICHIGAN FROM WILMETTE HARBOR IL TO MICHIGAN CITY IN 5 NM
OFFSHORE TO MID LAKE-
LAKE MICHIGAN FROM WHITEHALL TO PENTWATER MI 5 NM OFFSHORE TO MID
LAKE-
LAKE MICHIGAN FROM GRAND HAVEN TO WHITEHALL MI 5 NM OFFSHORE TO
MID LAKE-
LAKE MICHIGAN FROM HOLLAND TO GRAND HAVEN MI 5 NM OFFSHORE TO MID
LAKE-
LAKE MICHIGAN FROM SOUTH HAVEN TO HOLLAND MI 5 NM OFFSHORE TO MID
LAKE-
LAKE MICHIGAN FROM ST. JOSEPH TO SOUTH HAVEN MI 5 NM OFFSHORE TO
MID LAKE-
246 PM CDT MON JUL 21 2014

SHEBOYGAN WI TO PENTWATER MI SOUTH

.TONIGHT...SOUTH WINDS 10 TO 20 KT. PATCHY FOG. WAVES 1 TO 3 FT.
.TUESDAY...SOUTH WINDS TO 15 TO 25 KT INCREASING TO 30 KT. PATCHY
FOG IN THE MORNING. SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS IN
THE MORNING...THEN CHANCE OF SHOWERS AND THUNDERSTORMS IN THE
AFTERNOON. WAVES BUILDING TO 4 TO 6 FT OCCASIONALLY TO 8 FT.
.TUESDAY NIGHT...SOUTHWEST WINDS 15 TO 25 KT VEERING TO NORTH.
CHANCE OF SHOWERS AND THUNDERSTORMS. WAVES 3 TO 5 FT OCCASIONALLY
TO 8 FT.
.WEDNESDAY...NORTH WINDS TO 30 KT. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE MORNING. WAVES BUILDING TO 6 TO 9 FT
OCCASIONALLY TO 11 FT.
.WEDNESDAY NIGHT...NORTHEAST WINDS 15 TO 25 KT DIMINISHING TO 10
TO 20 KT AFTER MIDNIGHT. WAVES 6 TO 9 FT OCCASIONALLY TO 11 FT
SUBSIDING TO 4 TO 7 FT OCCASIONALLY TO 10 FT LATE.
.THURSDAY...NORTH WINDS 10 TO 15 KT. WAVES 4 TO 6 FT OCCASIONALLY
TO 8 FT SUBSIDING TO 2 TO 4 FT LATE.
.THURSDAY NIGHT...NORTHEAST WINDS 10 TO 15 KT DIMINISHING TO 5 TO
10 KT. WAVES 2 TO 4 FT.
.FRIDAY...NORTHEAST WINDS 5 TO 10 KT BECOMING VARIABLE...AND THEN
BECOMING SOUTH 10 TO 15 KT OVERNIGHT. WAVES 1 TO 2 FT.
.SATURDAY...SOUTH WINDS 10 TO 15 KT. CHANCE OF SHOWERS AND
THUNDERSTORMS. WAVES 1 TO 2 FT.

$$

LMZ761-220345-
MAFOR 2121/
MICHIGAN NORTH 14430 11430 12440 11449 19459. PATCHY FOG TONIGHT
THROUGH TUESDAY MORNING. CHANCE OF SHOWERS AND THUNDERSTORMS
EARLY IN THE MORNING. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT
TONIGHT. WAVES BUILDING TO 5 TO 8 FT OCCASIONALLY TO 10 FT
TUESDAY.

MICHIGAN SOUTH 14420 11420 11430 12440. PATCHY FOG TONIGHT
THROUGH TUESDAY MORNING. WAVES 1 TO 3 FT TONIGHT. WAVES BUILDING
TO 4 TO 6 FT OCCASIONALLY TO 8 FT TUESDAY.

$$

JEE





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