Great Lakes Forecast
Issued by NWS

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FZUS63 KLOT 201951
GLFLM

OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
251 PM CDT FRI MAR 20 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 30.3 INCHES OVER THE WESTERN ATLANTIC
WILL MOVE FURTHER OUT TO SEA TONIGHT. LOW PRESSURE OF 29.8 INCHES
JUST OFF THE CAROLINA COAST WILL DEEPEN TO 29.6 INCHES AS IT
CONTINUES EASTWARD. AN ELONGATED TROUGH OF LOW PRESSURE OF 29.8
INCHES AND AN ASSOCIATED COLD FRONT WILL MOVE SOUTH DOWN LAKE
MICHIGAN TONIGHT THEN DEEPEN SLIGHTLY AS IT PIVOTS ACROSS THE
LOWER GREAT LAKES AND ST. LAWRENCE VALLEY SATURDAY. HIGH PRESSURE
OF 30.6 INCHES WILL SHIFT FROM THE CANADIAN PRAIRIES SOUTHEAST
INTO THE GREAT LAKES FROM SUNDAY THROUGH MONDAY. THE HIGH WILL
THEN STEADILY SHIFT EASTWARD TO THE EASTERN SEABOARD BY MID WEEK.
LOW PRESSURE IS THEN EXPECTED TO MOVE ACROSS THE GREAT LAKES SOME
TIME WEDNESDAY.

LMZ261-362-364-366-563-565-567-868-210345-
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 CDT FRI MAR 20 2015

SHEBOYGAN WI TO PENTWATER MI NORTH

.TONIGHT...SOUTHWEST WINDS 10 TO 20 KT VEERING TO NORTH. RAIN OR
SNOW LIKELY THIS EVENING...THEN SLIGHT CHANCE OF RAIN OR SNOW
OVERNIGHT. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT.
.SATURDAY...NORTH WINDS 15 TO 25 KT DIMINISHING TO 10 TO 20 KT AND
BECOMING NORTHEAST. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT SUBSIDING
TO 2 TO 4 FT.
.SATURDAY NIGHT...NORTHEAST WINDS 10 TO 20 KT BECOMING NORTH.
WAVES 2 TO 4 FT.
.SUNDAY...NORTH WINDS 10 TO 15 KT. WAVES 2 TO 4 FT.
.SUNDAY NIGHT...NORTHEAST WINDS 10 TO 15 KT. WAVES 1 TO 3 FT.
.MONDAY...NORTHEAST WINDS 10 TO 15 KT. WAVES 1 TO 3 FT.
.MONDAY NIGHT...EAST WINDS 10 TO 15 KT BECOMING SOUTHEAST. WAVES
1 TO 3 FT.
.TUESDAY...SOUTH WINDS 10 TO 20 KT BECOMING SOUTHEAST. WAVES 1 TO
3 FT.
.WEDNESDAY...SOUTH WINDS 10 TO 20 KT VEERING TO NORTHWEST. SNOW
SHOWERS LIKELY WITH A CHANCE OF SHOWERS. WAVES 4 TO 6 FT
OCCASIONALLY TO 8 FT SUBSIDING TO 2 TO 4 FT.


$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-210345-
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 CDT FRI MAR 20 2015

SHEBOYGAN WI TO PENTWATER MI SOUTH

.TONIGHT...SOUTHWEST WINDS 15 TO 20 KT BECOMING NORTHWEST LATE.
WAVES 2 TO 4 FT.
.SATURDAY...NORTH WINDS 20 TO 25 KT BECOMING NORTHEAST 10 TO 20
KT. WAVES BUILDING TO 4 TO 6 FT OCCASIONALLY TO 8 FT.
.SATURDAY NIGHT...NORTHEAST WINDS 10 TO 15 KT INCREASING TO 10 TO
20 KT. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT.
.SUNDAY...NORTHEAST WINDS 10 TO 20 KT. WAVES 3 TO 5 FT
OCCASIONALLY TO 7 FT.
.SUNDAY NIGHT...NORTHEAST WINDS 10 TO 20 KT. CHANCE OF SNOW IN
THE EVENING...THEN CHANCE OF SNOW AND LIGHT FREEZING RAIN
OVERNIGHT. WAVES 2 TO 4 FT.
.MONDAY...EAST WINDS 10 TO 20 KT BECOMING NORTHEAST. WAVES 2 TO
4 FT.
.MONDAY NIGHT...NORTHEAST WINDS 10 TO 20 KT BECOMING EAST. WAVES
1 TO 3 FT.
.TUESDAY...SOUTHEAST WINDS 10 TO 20 KT. CHANCE OF RAIN. WAVES
1 TO 3 FT.
.WEDNESDAY...SOUTHWEST WINDS 15 TO 25 KT BECOMING WEST. CHANCE OF
SHOWERS. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT SUBSIDING TO 3 TO
5 FT OCCASIONALLY TO 7 FT.

$$

LMZ761-210345-
MAFOR 2022/
MICHIGAN NORTH 11530 11527 11627 11720 11820 19830 11830 11820
11120. SLIGHT CHANCE OF RAIN OR SNOW OVERNIGHT. WAVES 3 TO 5 FT
OCCASIONALLY TO 7 FT TONIGHT AND SATURDAY MORNING SUBSIDING TO 2
TO 4 FT SATURDAY AFTERNOON.

MICHIGAN SOUTH 11530 13520 11620 19730 11830 11820 11120. WAVES 2
TO 4 FT BUILDING TO 4 TO 6 FT OCCASIONALLY TO 8 FT SATURDAY.

$$


MDB


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