Great Lakes Forecast
Issued by NWS

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000
FZUS63 KLOT 222051
GLFLM

OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
251 PM CST MON DEC 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...LOW PRESSURE OF 29.4 INCHES STRETCHED ACROSS THE
CENTRAL MISSOURI RIVER VALLEY THIS AFTERNOON WILL PIVOT ACROSS THE
MID AND UPPER MISSISSIPPI VALLEY THIS EVENING. THE LOW WILL THEN
WEAKEN TO 29.7 INCHES AS IT MOVES TO NORTHERN LAKE MICHIGAN BY
LATE TUESDAY. THE LOW WILL THEN DISSIPATE TUESDAY NIGHT...AS
ANOTHER LOW NEAR 29.4 INCHES TAKES SHAPE OVER CENTRAL KENTUCKY BY
WEDNESDAY MORNING. THIS LOW WILL DEEPEN TO NEAR 29.2 INCHES AS IT
TRACKS TO THE CENTRAL GREAT LAKES WEDNESDAY EVENING...AND TO 28.9
INCHES AS IT CONTINUES INTO WESTERN QUEBEC THURSDAY MORNING.
ANOTHER LOW PRESSURE OF 29.3 INCHES OVER THE CENTRAL HIGH PLAINS
ON THURSDAY EVENING WILL TRACK TOWARD THE UPPER MISSISSIPPI VALLEY
BY FRIDAY EVENING WHILE WEAKENING TO 29.6 INCHES.

LMZ261-362-364-366-563-565-567-868-230430-
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-
251 PM CST MON DEC 22 2014

SHEBOYGAN WI TO PENTWATER MI NORTH

.TONIGHT...SOUTHEAST WINDS 15 TO 25 KT BECOMING EAST TO 30 KT.
PERIODS OF RAIN. WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT BUILDING TO
6 TO 9 FT OCCASIONALLY TO 11 FT.
.TUESDAY...EAST WINDS TO 30 KT BECOMING SOUTHEAST AND DIMINISHING
TO 10 TO 20 KT. PERIODS OF RAIN IN THE MORNING...THEN CHANCE OF
RAIN IN THE AFTERNOON. WAVES SUBSIDING TO 4 TO 7 FT OCCASIONALLY
TO 9 FT.
.TUESDAY NIGHT...SOUTH WINDS 10 TO 20 KT BECOMING SOUTHWEST 10 TO
15 KT AND THEN VARIABLE 5 TO 10 KT BY DAYBREAK. CHANCE OF RAIN.
WAVES SUBSIDING TO 2 TO 4 FT OVERNIGHT.
.WEDNESDAY...NORTH WINDS 5 TO 10 KT INCREASING TO 30 KT IN THE
AFTERNOON. CHANCE OF RAIN AND SNOW IN THE MORNING...THEN SNOW
LIKELY IN THE AFTERNOON. WAVES BUILDING TO 4 TO 6 FT OCCASIONALLY
TO 8 FT IN THE AFTERNOON.
.WEDNESDAY NIGHT...NORTHWEST WINDS TO 30 KT INCREASING TO GALES
TO 35 KT OVERNIGHT. CHANCE OF SNOW. WAVES BUILDING TO 7 TO 10 FT
OCCASIONALLY TO 13 FT OVERNIGHT.
.THURSDAY...WEST WINDS TO 30 KT DIMINISHING TO 15 TO 25 KT.
CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO 4 TO 6 FT
OCCASIONALLY TO 8 FT IN THE AFTERNOON.
.THURSDAY NIGHT...SOUTHWEST WINDS 10 TO 20 KT. SLIGHT CHANCE OF
SNOW. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT.
.FRIDAY...SOUTH WINDS 10 TO 20 KT. CHANCE OF SNOW. WAVES 3 TO
5 FT OCCASIONALLY TO 7 FT.
.SATURDAY...NORTHWEST WINDS 15 TO 25 KT. CHANCE OF SNOW SHOWERS.
WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-230430-
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-
251 PM CST MON DEC 22 2014

SHEBOYGAN WI TO PENTWATER MI SOUTH

.TONIGHT...SOUTHEAST WINDS 15 TO 25 KT INCREASING TO 30 KT.
PERIODS OF RAIN. WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT
BUILDING TO 6 TO 9 FT OCCASIONALLY TO 11 FT TONIGHT.
.TUESDAY...SOUTHEAST WINDS TO 30 KT BECOMING SOUTH AND
DIMINISHING TO 10 TO 20 KT. CHANCE OF RAIN. WAVES SUBSIDING TO 4
TO 7 FT OCCASIONALLY TO 9 FT IN THE AFTERNOON.
.TUESDAY NIGHT...SOUTHWEST WINDS 10 TO 20 KT VEERING TO NORTHWEST
5 TO 10 KT OVERNIGHT. SLIGHT CHANCE OF RAIN IN THE EVENING...THEN
CHANCE OF RAIN OVERNIGHT. WAVES SUBSIDING TO 1 TO 3 FT
OVERNIGHT.
.WEDNESDAY...NORTH WINDS 10 TO 15 KT INCREASING TO 30 KT IN THE
AFTERNOON. CHANCE OF RAIN AND SNOW IN THE MORNING...THEN SNOW AND
SLIGHT CHANCE OF RAIN IN THE AFTERNOON. WAVES BUILDING TO 4 TO 7
FT OCCASIONALLY TO 9 FT IN THE AFTERNOON.
.WEDNESDAY NIGHT...NORTHWEST WINDS TO 30 KT. SNOW LIKELY WITH
SLIGHT CHANCE OF RAIN IN THE EVENING...THEN CHANCE OF SNOW
OVERNIGHT. WAVES 8 TO 11 FT OCCASIONALLY TO 14 FT.
.THURSDAY...WEST WINDS TO 30 KT DIMINISHING TO 15 TO 25 KT.
SLIGHT CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO 4 TO 7 FT
OCCASIONALLY TO 9 FT IN THE AFTERNOON.
.THURSDAY NIGHT...SOUTHWEST WINDS 15 TO 25 KT. WAVES 4 TO 6 FT
OCCASIONALLY TO 8 FT.
.FRIDAY...SOUTH WINDS 15 TO 25 KT. SLIGHT CHANCE OF RAIN OR SNOW.
WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT.
.SATURDAY...WEST WINDS TO 30 KT. CHANCE OF SNOW SHOWERS. WAVES
4 TO 7 FT OCCASIONALLY TO 9 FT.

$$

LMZ761-230430-
MAFOR 2222/
MICHIGAN NORTH 11330 11336 11236 13246 11346 11326. CHANCE OF RAIN
LATE THIS AFTERNOON. WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT
BUILDING TO 6 TO 9 FT OCCASIONALLY TO 11 FT TONIGHT THEN
SUBSIDING TO 4 TO 7 FT OCCASIONALLY TO 9 FT TUESDAY AFTERNOON.

MICHIGAN SOUTH 10336 13346 12346 11330 12420. CHANCE OF RAIN
TUESDAY. WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT BUILDING TO 6 TO 9
FT OCCASIONALLY TO 11 FT TONIGHT AND THEN SUBSIDING TO 4 TO 7 FT
OCCASIONALLY TO 9 FT TUESDAY AFTERNOON.

$$

RC





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