Great Lakes Forecast
Issued by NWS

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FZUS63 KLOT 190242
GLFLM

OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
842 PM CST THU DEC 18 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...BROAD HIGH PRESSURE OF 30.4 INCHES EXTENDING FROM
ONTARIO TO THE CENTRAL GULF COAST WILL SLOWLY MOVE EAST AND EXTEND
FROM QUEBEC THROUGH THE LOWER MISSISSIPPI VALLEY BY SATURDAY...THEN
OFF TO THE ATLANTIC SEABOARD LATE SUNDAY. MEANWHILE...A WEAK
TROUGH OF LOW PRESSURE AVERAGING 30.1 INCHES DEVELOPS OVER THE
NORTHERN PLAINS FRIDAY. THIS INITIAL TROUGH WILL MOVE LITTLE
THROUGH SATURDAY. THEN A LOW PRESSURE SYSTEM IS EXPECTED TO DROP
OUT OF THE SOUTHERN CANADIAN ROCKIES BY SUNDAY EVENING...HELPING
TO DEEPEN THE SYSTEM TO 29.5 INCHES. THIS LOW IS THEN EXPECTED TO
TRACK EAST TO WISCONSIN EARLY NEXT WEEK WHILE DEEPENING FURTHER TO
29.3 INCHES.

LMZ261-362-364-366-563-565-567-868-191100-
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-
842 PM CST THU DEC 18 2014

SHEBOYGAN WI TO PENTWATER MI NORTH

.REST OF TONIGHT...NORTH WINDS 10 TO 15 KT. WAVES 2 TO 4 FT.
.FRIDAY...NORTH WINDS 5 TO 10 KT BECOMING NORTHWEST EARLY IN THE
AFTERNOON...THEN LIGHT AND VARIABLE LATE. WAVES 1 TO 3 FT.
.FRIDAY NIGHT...LIGHT AND VARIABLE WINDS. WAVES AROUND 1 FT.
.SATURDAY...SOUTH WINDS 5 TO 10 KT. WAVES 1 TO 2 FT.
.SATURDAY NIGHT...SOUTH WINDS 10 TO 15 KT. WAVES 1 TO 2 FT.
.SUNDAY...SOUTH WINDS 10 TO 15 KT INCREASING TO 15 TO 25 KT IN
THE AFTERNOON. SLIGHT CHANCE OF SNOW SHOWERS. WAVES 1 TO 3 FT
BUILDING TO 2 TO 4 FT IN THE AFTERNOON.
.SUNDAY NIGHT...SOUTH WINDS 15 TO 25 KT. CHANCE OF RAIN. WAVES
4 TO 6 FT OCCASIONALLY TO 8 FT.
.MONDAY...SOUTHEAST WINDS 15 TO 25 KT. CHANCE OF RAIN OR SNOW.
WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT.
.TUESDAY...SOUTH WINDS 15 TO 25 KT. RAIN OR SNOW SHOWERS LIKELY.
WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-191100-
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-
842 PM CST THU DEC 18 2014

SHEBOYGAN WI TO PENTWATER MI SOUTH

.REST OF TONIGHT...NORTH WINDS 10 TO 15 KT. SLIGHT CHANCE OF SNOW
SHOWERS. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT.
.FRIDAY...NORTHWEST WINDS 10 TO 15 KT DIMINISHING TO 5 TO 10 KT IN
THE AFTERNOON...THEN BECOMING LIGHT AND VARIABLE LATE. WAVES 2 TO
4 FT SUBSIDING TO 1 TO 3 FT IN THE AFTERNOON.
.FRIDAY NIGHT...LIGHT AND VARIABLE WINDS. WAVES AROUND 1 FT.
.SATURDAY...SOUTH WINDS 5 TO 10 KT. WAVES 1 TO 2 FT.
.SATURDAY NIGHT...SOUTH WINDS 10 TO 15 KT. WAVES 1 TO 3 FT.
.SUNDAY...SOUTH WINDS 10 TO 15 KT INCREASING TO 15 TO 25 KT IN
THE AFTERNOON. SLIGHT CHANCE OF SNOW SHOWERS IN THE AFTERNOON.
WAVES 1 TO 3 FT BUILDING TO 2 TO 4 FT IN THE AFTERNOON.
.SUNDAY NIGHT...SOUTH WINDS 15 TO 25 KT. SLIGHT CHANCE OF RAIN OR
SNOW. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT.
.MONDAY...SOUTH WINDS 15 TO 25 KT. CHANCE OF RAIN OR SNOW. WAVES
4 TO 6 FT OCCASIONALLY TO 8 FT.
.TUESDAY...SOUTHWEST WINDS 15 TO 25 KT. CHANCE OF RAIN OR SNOW
SHOWERS. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT.

$$
LMZ761-191100-
MAFOR 1904/
MICHIGAN NORTH 13810 12800 11700 12900. WAVES 2 TO 4 FT OVERNIGHT
SUBSIDING TO 1 TO 3 FT FRIDAY AND 1 FOOT OR LESS FRIDAY EVENING.

MICHIGAN SOUTH 13810 13700 12900. WAVES 3 TO 5 FT OCCASIONALLY TO
7 FT OVERNIGHT. WAVES 2 TO 4 FT FRIDAY SUBSIDING TO 1 FOOT OR LESS
FRIDAY EVENING.

$$

KMD








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