Great Lakes Forecast
Issued by NWS

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FZUS63 KLOT 231339
GLFLM

OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
839 AM CDT THU OCT 23 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...HIGH PRESSURE OF 30.3 INCHES EXTENDS FROM QUEBEC
SOUTHWEST ACROSS THE LAKES REGION. THIS HIGH WILL WEAKEN AND MOVE
SOUTH ACROSS THE OHIO VALLEY TONIGHT. LOW PRESSURE OF 29.6 INCHES
OVER CENTRAL MANITOBA WILL MOVE NORTH TODAY AND BE ABSORBED BY
ANOTHER LOW OF 29.4 INCHES MOVING ACROSS SASKATCHEWAN TONIGHT. A
WEAK COLD FRONT FROM THE FIRST LOW WILL MOVE ACROSS THE LAKE
TONIGHT AS IT DISSIPATES. THE SECOND LOW WILL DEEPEN TO 29.1
INCHES AS IT MOVES TO NEAR JAMES BAY SATURDAY AFTERNOON. A
TRAILING COLD FRONT FROM THIS LOW WILL MOVE ACROSS THE LAKE
SATURDAY MORNING. WEAK HIGH PRESSURE OF 30.1 INCHES WILL MOVE
ACROSS THE PLAINS SATURDAY AND THEN ACROSS THE WESTERN LAKES
SUNDAY AS IT WEAKENS TO 30.0 INCHES. A LARGE TROUGH OF LOW
PRESSURE IS EXPECTED TO FORM OVER THE CENTRAL AND NORTHERN PLAINS
SUNDAY INTO MONDAY...MOVING OVER THE NORTHERN LAKES TUESDAY.

LMZ261-362-364-366-563-565-567-868-232145-
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-
839 AM CDT THU OCT 23 2014

SHEBOYGAN WI TO PENTWATER MI NORTH

.REST OF TODAY...SOUTH WINDS 15 TO 25 KT. CHANCE OF SHOWERS...
MAINLY THIS AFTERNOON. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT.
.TONIGHT...SOUTH WINDS 15 TO 20 KT EARLY BECOMING SOUTHWEST 10
TO 15 KT OVERNIGHT. CHANCE OF SHOWERS IN THE EVENING. WAVES 3
TO 5 FT OCCASIONALLY TO 7 FT SUBSIDING TO 2 TO 4 FT.
.FRIDAY...SOUTHWEST WINDS INCREASING TO 10 TO 20 KT. WAVES 2 TO 4
FT.
.FRIDAY NIGHT...SOUTHWEST WINDS 15 TO 25 KT BECOMING WEST LATE.
WAVES BUILDING TO 3 TO 5 FT OCCASIONALLY TO 7 FT.
.SATURDAY...WEST WINDS 20 TO 25 KT. WAVES 4 TO 6 FT OCCASIONALLY
TO 8 FT.
.SATURDAY NIGHT...NORTHWEST WINDS 20 TO 25 KT. WAVES 4 TO 6 FT
OCCASIONALLY TO 8 FT.
.SUNDAY...WEST WINDS 10 TO 20 KT BECOMING SOUTH 10 TO 15 KT IN
THE AFTERNOON...THEN SOUTHEAST SUNDAY NIGHT. WAVES 4 TO 6 FT
OCCASIONALLY TO 8 FT SUBSIDING TO 1 TO 3 FT.
.MONDAY...SOUTHEAST WINDS 15 TO 25 KT. CHANCE OF SHOWERS AND
SLIGHT CHANCE OF THUNDERSTORMS. WAVES 3 TO 5 FT OCCASIONALLY TO
7 FT.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-232145-
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-
839 AM CDT THU OCT 23 2014

SHEBOYGAN WI TO PENTWATER MI SOUTH

.REST OF TODAY...SOUTH WINDS 15 TO 20 KT. CHANCE OF SHOWERS THIS
AFTERNOON. WAVES 2 TO 4 FT.
.TONIGHT...SOUTHWEST WINDS 10 TO 20 KT BECOMING WEST 10 TO 15 KT.
CHANCE OF SHOWERS IN THE EVENING. WAVES 2 TO 4 FT.
.FRIDAY...WEST WINDS AROUND 10 KT BECOMING SOUTHWEST 10 TO 15 KT.
WAVES 1 TO 3 FT.
.FRIDAY NIGHT...SOUTHWEST WINDS 10 TO 20 KT BECOMING WEST LATE.
WAVES 2 TO 4 FT.
.SATURDAY...WEST WINDS 20 TO 25 KT. WAVES 4 TO 6 FT OCCASIONALLY
TO 8 FT.
.SATURDAY NIGHT...NORTHWEST WINDS 20 TO 25 KT. WAVES 4 TO 7 FT
OCCASIONALLY TO 9 FT.
.SUNDAY...NORTHWEST WINDS 15 TO 20 KT DIMINISHING TO AROUND 10
KT AND BECOMING SOUTH BY SUNDAY EVENING...THEN INCREASING TO 15
TO 25 KT OVERNIGHT. WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT
SUBSIDING TO 2 TO 4 FT.
.MONDAY...SOUTH WINDS 15 TO 25 KT. CHANCE OF SHOWERS AND SLIGHT
CHANCE OF THUNDERSTORMS. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT.

$$
LMZ761-232145-
MAFOR 2315/
MICHIGAN NORTH 13430 11420 12520 12510. CHANCE OF SHOWERS THIS
AFTERNOON AND EVENING. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT TODAY
SUBSIDING TO 2 TO 4 FT TONIGHT AND CONTINUING FRIDAY MORNING.

MICHIGAN SOUTH 13420 13520 12610. CHANCE OF SHOWERS THIS
AFTERNOON AND EVENING. WAVES 2 TO 4 FT SUBSIDING TO 1 TO 3 FT
FRIDAY MORNING.

$$

BMD






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