Great Lakes Forecast
Issued by NWS

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000
FZUS63 KLOT 210839
GLFLM

OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
239 AM CST WED JAN 21 2015

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 CENTERED OVER CENTRAL
QUEBEC WILL CONTINUE TO MOVE AWAY FROM THE GREAT LAKES REGION
TODAY. MEANWHILE...WEAK LOW PRESSURE OF 30.0 INCHES WILL MOVE
ACROSS NORTHERN ILLINOIS THIS MORNING AND TO OHIO BY EARLY THIS
EVENING. HIGH PRESSURE WILL THEN BUILD OVER THE CENTRAL PLAINS ON
THURSDAY WITH A RIDGE AXIS AVERAGING 30.5 INCHES EXTENDING OVER
THE CENTRAL GREAT LAKES DURING THE DAY. BY THURSDAY NIGHT THIS
WILL SHIFT SOUTH AND A STRONG LOW PRESSURE OF 29.4 INCHES WILL
MOVE ACROSS CENTRAL ONTARIO. THIS WILL DRAG A COLD FRONT ACROSS
THE LAKE LATE FRIDAY NIGHT INTO SATURDAY. LOW PRESSURE AROUND 29.5
INCHES WILL THEN APPROACH LAKE MICHIGAN FROM THE NORTHWEST
SOMETIME ON SUNDAY.


LMZ261-362-364-366-563-565-567-868-211645-
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-
239 AM CST WED JAN 21 2015

SHEBOYGAN WI TO PENTWATER MI NORTH

.TODAY...NORTHEAST WINDS 10 TO 15 KT BECOMING NORTH IN THE
AFTERNOON. SLIGHT CHANCE OF SNOW. WAVES 1 TO 3 FT.
.TONIGHT...NORTHWEST WINDS 10 TO 15 KT. WAVES 1 TO 3 FT.
.THURSDAY...NORTHWEST WINDS 10 TO 15 KT BECOMING WEST 10 TO
20 KT. WAVES 1 TO 3 FT.
.THURSDAY NIGHT...SOUTHWEST WINDS TO 30 KT INCREASING TO GALES TO
35 KT AFTER MIDNIGHT. WAVES BUILDING TO 6 TO 9 FT OCCASIONALLY
TO 11 FT OVERNIGHT.
.FRIDAY...SOUTHWEST GALES TO 35 KT EASING TO 30 KT IN THE
AFTERNOON. CHANCE OF SNOW. WAVES 6 TO 9 FT OCCASIONALLY TO 11 FT.
.FRIDAY NIGHT...SOUTHWEST WINDS 15 TO 25 KT BECOMING WEST 10 TO 20
KT. CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO 4 TO 7 FT
OCCASIONALLY TO 9 FT.
.SATURDAY...NORTHWEST WINDS 10 TO 20 KT BECOMING NORTHEAST DURING
THE NIGHT. CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO 1 TO 3 FT.
.SUNDAY...EAST WINDS 15 TO 20 KT. SLIGHT CHANCE OF SNOW. WAVES
2 TO 4 FT.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-211645-
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-
239 AM CST WED JAN 21 2015

SHEBOYGAN WI TO PENTWATER MI SOUTH

.TODAY...NORTHEAST WINDS 10 TO 15 KT INCREASING TO 10 TO 20 KT BY
LATE MORNING...THEN BECOMING NORTH IN THE AFTERNOON. SNOW
LIKELY...MAINLY THIS MORNING. WAVES 2 TO 4 FT.
.TONIGHT...NORTH WINDS 10 TO 20 KT BECOMING NORTHWEST AFTER
MIDNIGHT. CHANCE OF SNOW. WAVES 2 TO 4 FT.
.THURSDAY...NORTHWEST WINDS 10 TO 15 KT BECOMING WEST IN THE
AFTERNOON. SLIGHT CHANCE OF SNOW IN THE MORNING. WAVES 2 TO 4 FT.
.THURSDAY NIGHT...SOUTHWEST WINDS 15 TO 25 KT INCREASING TO 30 KT
IN THE AFTERNOON. WAVES BUILDING TO 4 TO 6 FT OCCASIONALLY TO 8
FT OVERNIGHT.
.FRIDAY...SOUTHWEST WINDS TO 30 KT. WAVES 4 TO 7 FT OCCASIONALLY
TO 9 FT.
.FRIDAY NIGHT...SOUTHWEST WINDS TO 30 KT BECOMING WEST 15 TO 25
KT. SLIGHT CHANCE OF SNOW SHOWERS. WAVES 4 TO 7 FT OCCASIONALLY TO
9 FT.
.SATURDAY...NORTHWEST WINDS 10 TO 20 KT BECOMING NORTH DURING THE
NIGHT. SLIGHT CHANCE OF SNOW SHOWERS. WAVES 3 TO 5 FT
OCCASIONALLY TO 7 FT.
.SUNDAY...EAST WINDS 10 TO 20 KT. CHANCE OF SNOW. WAVES BUILDING
TO 2 TO 4 FT.

$$

LMZ761-211645-
MAFOR 2110/
MICHIGAN NORTH 13110 12810 13710. WAVES 1 TO 3 FT.

MICHIGAN SOUTH 12117 11127 14820 11720. CHANCE OF SNOW THIS
AFTERNOON AND TONIGHT. WAVES 2 TO 4 FT.

$$

MTF




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