Great Lakes Forecast
Issued by NWS

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FZUS63 KLOT 220143
GLFLM

OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
843 PM CDT THU MAY 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 LOW PRESSURE TROUGH AND ASSOCIATED COLD FRONT
AVERAGING 29.9 INCHES STRETCHING FROM SOUTHERN QUEBEC THROUGH
CENTRAL LAKE MICHIGAN THIS EVENING WILL SHIFT SOUTHWARD THROUGH
EARLY OVERNIGHT. HIGH PRESSURE OF 30.3 INCHES WILL THEN BUILD
ACROSS THE GREAT LAKES ON FRIDAY AND SLOWLY MOVE SOUTHEAST DURING
THE START OF THE WEEKEND. LOW PRESSURE OF 29.5 INCHES WILL MOVE
FROM THE CENTRAL PLAINS ON MEMORIAL DAY TO NEAR LAKE SUPERIOR BY
TUESDAY...LIKELY BRINGING A COLD FRONT ACROSS THE LAKE SOMETIME ON
OR NEAR TUESDAY.


LMZ261-362-364-366-563-565-567-868-220930-
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-
843 PM CDT THU MAY 21 2015

SHEBOYGAN WI TO PENTWATER MI NORTH

.REST OF TONIGHT...NORTHEAST WINDS 10 TO 20 KT WITH OCCASIONAL
GUSTS TO 25 KT THIS EVENING...BECOMING NORTH 10 TO 15 KT
OVERNIGHT. WAVES 2 TO 4 FT.
.FRIDAY...NORTH WINDS 5 TO 10 KT BACKING TO SOUTHWEST 10 TO 15
KT BY MID AFTERNOON. WAVES 1 TO 3 FT.
.FRIDAY NIGHT...SOUTH WINDS 10 TO 15 KT. WAVES 1 TO 2 FT.
.SATURDAY...SOUTHWEST WINDS 10 TO 20 KT INCREASING TO 15 TO
25 KT. WAVES 1 TO 3 FT BUILDING TO 3 TO 5 FT OCCASIONALLY TO
7 FT.
.SATURDAY NIGHT...SOUTHWEST WINDS 15 TO 25 KT DIMINISHING TO
10 TO 20 KT. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT SUBSIDING TO 1
TO 3 FT.
.SUNDAY...SOUTH WINDS 10 TO 15 KT. WAVES 1 TO 3 FT.
.SUNDAY NIGHT...SOUTH WINDS 10 TO 15 KT. SHOWERS LIKELY. WAVES
1 TO 3 FT.
.MONDAY...SOUTHEAST WINDS 10 TO 20 KT BECOMING SOUTH. SHOWERS
LIKELY. WAVES 2 TO 4 FT.
.TUESDAY...SOUTHWEST WINDS 10 TO 20 KT. WAVES 2 TO 4 FT.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-220930-
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-
843 PM CDT THU MAY 21 2015

SHEBOYGAN WI TO PENTWATER MI SOUTH

.REST OF TONIGHT...WEST WINDS 15 TO 25 KT VEERING TO NORTH THROUGH
THIS EVENING...THEN DIMINISHING TO 10 TO 20 KT DURING THE PREDAWN
HOURS. A FEW GUSTS TO 30 KT THIS EVENING. SCATTERED SHOWERS
THIS EVENING. WAVES 2 TO 4 FT BUILDING TO 3 TO 6 FT OCCASIONALLY
TO 8 FT.
.FRIDAY...NORTH WINDS 10 TO 15 KT. WAVES 2 TO 4 FT SUBSIDING TO 1
TO 3 FT.
.FRIDAY NIGHT...EAST WINDS 5 TO 10 KT VEERING TO SOUTH. WAVES
1 TO 2 FT.
.SATURDAY...SOUTH WINDS 10 TO 15 KT INCREASING TO 10 TO 20 KT.
WAVES 1 TO 3 FT.
.SATURDAY NIGHT...SOUTH WINDS 10 TO 20 KT DIMINISHING TO 10 TO
15 KT. WAVES 1 TO 3 FT.
.SUNDAY...SOUTH WINDS 10 TO 15 KT. CHANCE OF SHOWERS. WAVES 1 TO
2 FT.
.SUNDAY NIGHT...SOUTHEAST WINDS 10 TO 15 KT BECOMING SOUTH 10 TO
20 KT. SHOWERS LIKELY. WAVES 1 TO 3 FT.
.MONDAY...SOUTH WINDS 15 TO 25 KT. SHOWERS LIKELY WITH A CHANCE
OF THUNDERSTORMS. WAVES 2 TO 4 FT.
.TUESDAY...SOUTHWEST WINDS 10 TO 20 KT BECOMING SOUTH. CHANCE OF
SHOWERS AND THUNDERSTORMS. WAVES 2 TO 4 FT.

$$
LMZ761-220930-
MAFOR 2204/
MICHIGAN NORTH 12120 19130 11810 11800 11900 11600 11510 11410.
WAVES 2 TO 4 FT TONIGHT. WAVES 1 TO 3 FT FRIDAY AND FRIDAY
EVENING.

MICHIGAN SOUTH 10630 12830 11820 14810 11300. SCATTERED SHOWERS
THIS EVENING. WAVES 2 TO 4 FT BUILDING TO 3 TO 6 FT OCCASIONALLY
TO 8 FT BY MIDNIGHT. WAVES 2 TO 4 FT SUBSIDING TO 1 TO 3 FT
FRIDAY.

$$

MTF



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