Great Lakes Forecast
Issued by NWS

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000
FZUS63 KLOT 211822 AAA
GLFLM

OPEN LAKE FORECAST FOR LAKE MICHIGAN...UPDATED
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
122 PM CDT TUE APR 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...A TROUGH OF LOW PRESSURE OF 29.1 INCHES CENTERED OVER
ONTARIO WILL GRADUALLY MOVE EAST TO THE NEW ENGLAND COAST BY
THURSDAY. AN EXPANSIVE RIDGE OF HIGH PRESSURE AVERAGING 30.2
INCHES WILL BUILD ACROSS THE CANADIAN PRAIRIES AND SOUTHEAST INTO
THE OHIO VALLEY WHERE IT WILL GENERALLY REMAIN THROUGH THE END OF
THE WEEK.

LMZ261-362-364-366-563-565-567-868-212115-
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-
122 PM CDT TUE APR 21 2015

.REST OF THIS AFTERNOON...SOUTHWEST WINDS TO 30 KT BECOMING WEST
THIS AFTERNOON. SCATTERED SHOWERS. WAVES 4 TO 7 FT OCCASIONALLY
TO 9 FT.
.TONIGHT...WEST WINDS 15 TO 25 KT BECOMING NORTHWEST. CHANCE OF
RAIN AND SNOW SHOWERS. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT.
.WEDNESDAY...NORTHWEST WINDS 15 TO 25 KT DIMINISHING TO 10 TO
20 KT. CHANCE OF RAIN AND SNOW SHOWERS. WAVES 4 TO 6 FT
OCCASIONALLY TO 8 FT SUBSIDING TO 2 TO 4 FT.
.WEDNESDAY NIGHT...NORTHWEST WINDS 10 TO 20 KT. CHANCE OF RAIN
AND SNOW SHOWERS. WAVES 2 TO 4 FT.
.THURSDAY...NORTHWEST WINDS 10 TO 20 KT. WAVES 2 TO 4 FT.
.THURSDAY NIGHT...NORTHWEST WINDS 10 TO 15 KT. WAVES 1 TO 3 FT.
.FRIDAY...NORTHWEST WINDS 10 TO 15 KT BECOMING NORTH. WAVES 1 TO
3 FT.
.SATURDAY...NORTH WINDS 10 TO 15 KT. WAVES 1 TO 3 FT.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-212115-
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-
122 PM CDT TUE APR 21 2015

SHEBOYGAN WI TO PENTWATER MI SOUTH

.REST OF THIS AFTERNOON...WEST WINDS TO 30 KT...GALE FORCE GUSTS
TO 40 KT CLOSER TO THE WESTERN NEARSHORE WATERS. ISOLATED SHOWERS.
WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT.
.TONIGHT...WEST WINDS TO 30 KT BECOMING NORTHWEST LATE. ISOLATED
SLIGHT RAIN OR SNOW SHOWERS. WAVES 4 TO 6 FT OCCASIONALLY TO 8
FT.
.WEDNESDAY...NORTHWEST WINDS TO 30 KT BECOMING WEST 10 TO 20 KT.
WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT.
.WEDNESDAY NIGHT...NORTHWEST WINDS 10 TO 20 KT. WAVES 2 TO 4 FT.
.THURSDAY...NORTHWEST WINDS 10 TO 20 KT DIMINISHING TO 10 TO
15 KT. WAVES 2 TO 4 FT.
.THURSDAY NIGHT...WEST WINDS 5 TO 10 KT BECOMING NORTHWEST. WAVES
1 TO 2 FT.
.FRIDAY...NORTH WINDS 5 TO 10 KT BECOMING NORTHEAST 10 TO 15 KT.
WAVES 1 TO 2 FT.
.SATURDAY...NORTHEAST WINDS 10 TO 20 KT BECOMING NORTH. WAVES
1 TO 3 FT.

$$
LMZ761-212115-
MAFOR 2119 AMD/
MICHIGAN NORTH 11540 11640 12630 13730. SCATTERED SHOWERS. WAVES
4 TO 7 FT OCCASIONALLY TO 9 FT.

MICHIGAN SOUTH 12640 19650 13630 11730 11740. ISOLATED SHOWERS.
WAVES 4 TO 7 FT OCCASIONALLY TO 8 FT.


$$

IZZI


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