Great Lakes Forecast
Issued by NWS

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FZUS63 KLOT 230150
GLFLM

OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
850 PM CDT WED OCT 22 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 30.4 INCHES EXTENDS FROM QUEBEC TO
THE WESTERN GREAT LAKES AND WILL MOVE EAST WHILE WEAKENING TO 30.2
INCHES THURSDAY. AN AREA OF LOW PRESSURE OF 29.6 INCHES WILL MOVE
ACROSS THE SOUTHERN CANADIAN PRAIRIES LATE TONIGHT INTO THURSDAY.
THE LOW WILL FILL THURSDAY NIGHT AS ANOTHER LOW DEVELOPS ACROSS
SASKATCHEWAN...BUT WILL TRAIL A WEAK TROUGH AVERAGING 30.0 INCHES
ACROSS LAKE MICHIGAN LATE THURSDAY NIGHT. HIGH PRESSURE RIDGING OF
30.1 INCHES WILL REDEVELOP OVER THE LAKE FRIDAY AS THE CANADIAN
LOW DEEPENS TO 29.5 INCHES WHILE IT MOVES EAST TOWARD JAMES BAY
AND TRAILS ANOTHER COLD FRONT ACROSS THE LAKE LATE FRIDAY NIGHT.
THIS LOW WILL CONTINUE TO DEEPEN TO 29.3 INCHES AS IT MOVES INTO
SOUTHERN QUEBEC SATURDAY NIGHT...BEFORE ANOTHER WEAK AREA OF HIGH
PRESSURE OF 30.0 INCHES MOVES ACROSS THE WESTERN LAKES SUNDAY. LOW
PRESSURE OF 29.3 INCHES WILL DEVELOP OVER THE PLAINS DURING THIS
PERIOD...AND WILL LIFT NORTHEAST ACROSS THE UPPER MIDWEST MONDAY.


LMZ261-362-364-366-563-565-567-868-230930-
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-
850 PM CDT WED OCT 22 2014

SHEBOYGAN WI TO PENTWATER MI NORTH

.REST OF TONIGHT...SOUTHEAST WINDS 10 TO 15 KT BECOMING SOUTH LATE.
WAVES 1 TO 3 FT.
.THURSDAY...SOUTH WINDS 10 TO 20 KT INCREASING TO 15 TO 25 KT FROM
LATE MORNING ON. CHANCE OF SHOWERS IN THE EARLY
AFTERNOON...BECOMING LIKELY IN THE LATE AFTERNOON. WAVES BUILDING
TO 3 TO 5 FT OCCASIONALLY TO 7 FT.
.THURSDAY NIGHT...SOUTH WINDS 15 TO 25 KT EARLY BECOMING WEST 10
TO 20 KT. SHOWERS LIKELY IN THE EVENING. WAVES 3 TO 5 FT
OCCASIONALLY TO 7 FT SUBSIDING TO 2 TO 4 FT.
.FRIDAY...SOUTHWEST WINDS 10 TO 15 KT. WAVES 1 TO 3 FT.
.FRIDAY NIGHT...SOUTHWEST WINDS 15 TO 25 KT. WAVES 3 TO 5 FT
OCCASIONALLY TO 7 FT.
.SATURDAY...WEST WINDS 15 TO 25 KT. WAVES 4 TO 6 FT OCCASIONALLY
TO 8 FT.
.SATURDAY NIGHT...NORTHWEST WINDS 15 TO 25 KT. A FEW GUSTS TO 30
KT POSSIBLE. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT.
.SUNDAY...NORTHWEST WINDS 15 TO 25 KT DIMINISHING TO 10 TO 15 KT
AND BACKING SOUTHWEST. WAVES 4 TO 6 FT OCCASIONALLY TO 8 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.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-230930-
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-
850 PM CDT WED OCT 22 2014

SHEBOYGAN WI TO PENTWATER MI SOUTH

.REST OF TONIGHT...EAST WINDS 5 TO 10 KT BECOMING SOUTH 10 TO 15
KT LATE. WAVES 1 TO 3 FT.
.THURSDAY...SOUTH WINDS 10 TO 20 KT. CHANCE OF SHOWERS IN THE
EARLY AFTERNOON...BECOMING LIKELY IN THE LATE AFTERNOON. WAVES 2
TO 4 FT.
.THURSDAY NIGHT...SOUTHWEST WINDS 15 TO 20 KT BECOMING WEST 10 TO
20 KT. SHOWERS LIKELY IN THE EVENING. WAVES 2 TO 4 FT.
.FRIDAY...WEST WINDS 10 TO 15 KT BECOMING SOUTHWEST. WAVES 1 TO
3 FT.
.FRIDAY NIGHT...SOUTHWEST WINDS 10 TO 20 KT BECOMING WEST AT 15
TO 25 KT TOWARD MORNING. WAVES 2 TO 4 FT.
.SATURDAY...WEST WINDS 15 TO 25 KT. A FEW GUSTS TO 30 KT POSSIBLE
LATE. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT.
.SATURDAY NIGHT...NORTHWEST WINDS TO 30 KT. WAVES 4 TO 7 FT
OCCASIONALLY TO 9 FT.
.SUNDAY...NORTHWEST WINDS 10 TO 20 KT DIMINISHING TO 10 TO 15 KT
AND BACKING SOUTH IN THE AFTERNOON. WAVES 4 TO 6 FT OCCASIONALLY
TO 8 FT SUBSIDING TO 3 TO 5 FT OCCASIONALLY TO 7 FT IN THE
AFTERNOON.
.MONDAY...SOUTH WINDS TO 30 KT. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT.

$$
LMZ761-230930-
MAFOR 2303/
MICHIGAN NORTH 12310 11410 11420 12430 12436. CHANCE OF SHOWERS
EARLY THURSDAY AFTERNOON. WAVES 1 TO 3 FT TONIGHT BUILDING TO 3
TO 5 FT OCCASIONALLY TO 7 FT THURSDAY AND THURSDAY EVENING.

MICHIGAN SOUTH 11200 11310 11410 13420 11426 11526. CHANCE OF
SHOWERS IN THE EARLY AFTERNOON. WAVES 1 TO 3 FT TONIGHT BUILDING
TO 2 TO 4 FT THURSDAY AND THURSDAY EVENING.

$$

MTF





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