Great Lakes Forecast
Issued by NWS

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000
FZUS63 KLOT 010749
GLFLM

OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
249 AM CDT FRI MAY 1 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 30.2 INCHES CENTERED ACROSS ILLINOIS
AND LAKE MICHIGAN WILL SLOWLY MOVE SOUTHEAST THIS AFTERNOON AND
TONIGHT...REACHING THE OHIO VALLEY ON SATURDAY. LOW PRESSURE OF
29.4 INCHES WILL MOVE FROM THE SOUTHERN CANADIAN PRAIRIES ON
SATURDAY AFTERNOON TO HUDSON BAY BY SUNDAY. THIS WILL USHER A
COLD FRONT INTO THE WESTERN GREAT LAKES SUNDAY NIGHT. THIS FRONT
WILL EASE ITS WAY SOUTHWARD DOWN THE LAKE ON MONDAY AND STALL JUST
SOUTH OF THE LAKE BY MONDAY NIGHT. THIS FRONT WILL EVENTUALLY
RETURN NORTHWARD DURING MIDWEEK AS LOW PRESSURE ORGANIZES IN THE
UPPER PLAINS.

LMZ261-362-364-366-563-565-567-868-011545-
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-
249 AM CDT FRI MAY 1 2015

SHEBOYGAN WI TO PENTWATER MI NORTH

.TODAY...NORTHWEST WINDS 10 TO 15 KT BACKING TO WEST 5 TO 10 KT
SOON AFTER DAYBREAK...THEN BECOMING SOUTH 10 TO 15 KT BY EARLY
AFTERNOON. WAVES 1 TO 3 FT.
.TONIGHT...SOUTH WINDS 10 TO 15 KT BECOMING SOUTHWEST AFTER
MIDNIGHT. WAVES 1 TO 2 FT.
.SATURDAY...SOUTHWEST WINDS 10 TO 15 KT BECOMING SOUTH 10 TO
20 KT IN THE AFTERNOON. WAVES 1 TO 3 FT.
.SATURDAY NIGHT...SOUTH WINDS 10 TO 20 KT. WAVES 2 TO 4 FT.
.SUNDAY...SOUTH WINDS 10 TO 20 KT INCREASING TO 15 TO 25 KT.
CHANCE OF SHOWERS AND THUNDERSTORMS IN THE AFTERNOON. WAVES
BUILDING TO 3 TO 5 FT OCCASIONALLY TO 7 FT.
.SUNDAY NIGHT...SOUTH WINDS 15 TO 25 KT BECOMING SOUTHWEST 10 TO
20 KT. SHOWERS AND THUNDERSTORMS LIKELY. WAVES SUBSIDING TO 2 TO 4
FT.
.MONDAY...NORTHWEST WINDS 10 TO 15 KT BECOMING NORTH. WAVES 1 TO
3 FT.
.TUESDAY...NORTHEAST WINDS 10 TO 15 KT DIMINISHING TO 5 TO 10 KT.
WAVES 1 TO 2 FT.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-011545-
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-
249 AM CDT FRI MAY 1 2015

SHEBOYGAN WI TO PENTWATER MI SOUTH

.TODAY...NORTH WINDS 10 TO 15 KT BECOMING SOUTH 5 TO 10 KT BY
EARLY AFTERNOON. WAVES 2 TO 4 FT SUBSIDING TO 1 TO 2 FT BY
AFTERNOON.
.TONIGHT...SOUTH WINDS 10 TO 15 KT BECOMING SOUTHWEST AFTER
MIDNIGHT. WAVES 1 TO 2 FT.
.SATURDAY...SOUTHWEST WINDS 10 TO 15 KT BECOMING SOUTH 10 TO 20
KT IN THE AFTERNOON. WAVES 1 TO 3 FT.
.SATURDAY NIGHT...SOUTH WINDS 10 TO 20 KT. WAVES 1 TO 3 FT.
.SUNDAY...SOUTH WINDS 10 TO 20 KT INCREASING TO 15 TO 25 KT.
CHANCE OF SHOWERS AND THUNDERSTORMS IN THE AFTERNOON. WAVES 2 TO
4 FT.
.SUNDAY NIGHT...SOUTH WINDS 15 TO 25 KT BECOMING SOUTHWEST 10 TO
20 KT. SHOWERS AND THUNDERSTORMS LIKELY. WAVES 2 TO 4 FT.
.MONDAY...SOUTHWEST WINDS 10 TO 20 KT VEERING TO NORTH 10 TO 15
KT...THEN NORTHEAST MONDAY NIGHT. SHOWERS AND THUNDERSTORMS
LIKELY. WAVES 1 TO 3 FT.
.TUESDAY...NORTHEAST WINDS 10 TO 15 KT. CHANCE OF SHOWERS AND
THUNDERSTORMS. WAVES 1 TO 3 FT.

$$

LMZ761-011545-
MAFOR 0110/
MICHIGAN NORTH 11710 11600 11500 14410 11510. WAVES 1 TO 3 FT.

MICHIGAN SOUTH 12810 11900 12400 12410 11510. WAVES 2 TO 4 FT
SUBSIDING TO 1 TO 2 FT BY AFTERNOON AND PERSISTING TONIGHT.

$$

MTF


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