Great Lakes Forecast
Issued by NWS

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FZUS63 KLOT 261932
GLFLM

OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
232 PM CDT THU MAR 26 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...LOW PRESSURE OF 29.8 INCHES OVER SOUTHWEST ONTARIO
WILL MOVE EAST INTO QUEBEC BY THIS EVENING...TRAILING A SURFACE
TROUGH AVERAGING 29.9 INCHES ACROSS LAKE MICHIGAN. HIGH PRESSURE
OF 30.2 INCHES OVER MANITOBA WILL MOVE SOUTHEAST TO THE NORTHERN
LAKES FRIDAY MORNING AND WILL SLOWLY DRIFT SOUTH ACROSS LAKE
MICHIGAN FRIDAY NIGHT WHILE WEAKENING SLIGHTLY TO 30.3 INCHES.
THE HIGH WILL THEN DRIFT SOUTHEAST ACROSS THE OHIO VALLEY
SATURDAY AND SATURDAY NIGHT...AS ANOTHER AREA OF LOW PRESSURE OF
29.4 INCHES DEVELOPS OVER CENTRAL CANADA AND MOVES EAST INTO
ONTARIO BY EARLY SUNDAY WHILE DEEPENING TO 29.3 INCHES. THIS WILL
LEAD TO STRONG SOUTH WINDS DEVELOPING ACROSS THE LAKE SATURDAY
NIGHT...WITH SOUTH GALES POSSIBLE SUNDAY. THE LOW WILL TRAIL A
COLD FRONT ACROSS THE LAKE BY SUNDAY NIGHT TURNING WINDS TO THE
WEST AND ALLOWING A GRADUAL DECREASE IN WIND SPEEDS INTO MONDAY AS
WEAK HIGH PRESSURE RIDGING OF 30.0 INCHES MOVES IN FROM THE WEST.

LMZ261-362-364-366-563-565-567-868-270345-
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-
232 PM CDT THU MAR 26 2015

SHEBOYGAN WI TO PENTWATER MI NORTH

.TONIGHT...NORTH WINDS TO 30 KT DIMINISHING TO 15 TO 25 KT.
CHANCE OF SNOW SHOWERS. WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT
BUILDING TO 6 TO 9 FT OCCASIONALLY TO 11 FT.
.FRIDAY...NORTH WINDS 15 TO 25 KT. SLIGHT CHANCE OF SNOW SHOWERS.
WAVES 6 TO 9 FT OCCASIONALLY TO 11 FT SUBSIDING TO 4 TO 7 FT
OCCASIONALLY TO 9 FT.
.FRIDAY NIGHT...NORTH WINDS 10 TO 20 KT DIMINISHING TO 10 TO
15 KT. WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT SUBSIDING TO 3 TO
5 FT OCCASIONALLY TO 7 FT.
.SATURDAY...NORTHWEST WINDS 5 TO 10 KT BACKING TO SOUTHWEST.
WAVES 2 TO 4 FT SUBSIDING TO 1 TO 3 FT.
.SATURDAY NIGHT...SOUTHWEST WINDS 10 TO 20 KT INCREASING TO 15 TO
25 KT. WAVES 2 TO 4 FT BUILDING TO 4 TO 7 FT OCCASIONALLY TO
9 FT.
.SUNDAY...SOUTH GALES TO 35 KT BECOMING SOUTHWEST. RAIN AND SNOW
SHOWERS LIKELY. WAVES BUILDING TO 10 TO 14 FT OCCASIONALLY TO 18
FT.
.SUNDAY NIGHT...WEST WINDS TO 30 KT BECOMING NORTHWEST. CHANCE OF
RAIN AND SNOW SHOWERS. WAVES 8 TO 11 FT OCCASIONALLY TO 14 FT
SUBSIDING TO 4 TO 7 FT OCCASIONALLY TO 9 FT.
.MONDAY...NORTHWEST WINDS 15 TO 25 KT BECOMING WEST 10 TO 20 KT.
WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT SUBSIDING TO 3 TO 5 FT
OCCASIONALLY TO 7 FT.
.TUESDAY...SOUTH WINDS 10 TO 15 KT BECOMING SOUTHWEST. WAVES 1 TO
3 FT.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-270345-
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-
232 PM CDT THU MAR 26 2015

SHEBOYGAN WI TO PENTWATER MI SOUTH

.TONIGHT...NORTHWEST WINDS 15 TO 25 KT BECOMING NORTH AND
INCREASING TO 30 KT. CHANCE OF RAIN AND SNOW SHOWERS OVERNIGHT.
WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT BUILDING TO 6 TO 9 FT
OCCASIONALLY TO 11 FT.
.FRIDAY...NORTH WINDS TO 30 KT. CHANCE OF SNOW SHOWERS. WAVES 6
TO 9 FT OCCASIONALLY TO 11 FT.
.FRIDAY NIGHT...NORTH WINDS 15 TO 25 KT BECOMING NORTHEAST 10 TO
15 KT. WAVES 5 TO 8 FT OCCASIONALLY TO 10 FT SUBSIDING TO 4 TO
7 FT OCCASIONALLY TO 9 FT.
.SATURDAY...NORTH WINDS 10 TO 15 KT BECOMING NORTHWEST. WAVES
3 TO 5 FT OCCASIONALLY TO 7 FT SUBSIDING TO 2 TO 4 FT.
.SATURDAY NIGHT...SOUTH WINDS 10 TO 15 KT INCREASING TO 15 TO
25 KT OVERNIGHT. WAVES 1 TO 3 FT BUILDING TO 4 TO 7 FT
OCCASIONALLY TO 9 FT.
.SUNDAY...SOUTH WINDS TO 30 KT BECOMING SOUTHWEST GALES TO 35 KT
IN THE AFTERNOON. RAIN AND SNOW SHOWERS LIKELY...POSSIBLY MIXING
WITH SLEET IN THE MORNING. WAVES 8 TO 11 FT OCCASIONALLY TO 14 FT.
.SUNDAY NIGHT...WEST WINDS TO 30 KT. CHANCE OF RAIN AND SNOW
SHOWERS. WAVES 8 TO 11 FT OCCASIONALLY TO 14 FT SUBSIDING TO 4 TO
7 FT OCCASIONALLY TO 9 FT.
.MONDAY...NORTHWEST WINDS 15 TO 25 KT BECOMING WEST 10 TO 15 KT
IN THE AFTERNOON. WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT SUBSIDING
TO 3 TO 5 FT OCCASIONALLY TO 7 FT.
.TUESDAY...WEST WINDS 10 TO 15 KT BECOMING NORTHWEST. WAVES 1 TO
3 FT.

$$

LMZ761-270345-
MAFOR 2622/
MICHIGAN NORTH 14840 11840 13830. CHANCE OF SNOW SHOWERS. WAVES
4 TO 7 FT OCCASIONALLY TO 9 FT BUILDING TO 6 TO 9 FT OCCASIONALLY
TO 11 FT TONIGHT AND FRIDAY MORNING. WAVES SUBSIDING TO 4 TO 7 FT
OCCASIONALLY TO 9 FT AGAIN FRIDAY AFTERNOON.

MICHIGAN SOUTH 11730 14840 11840 12830. CHANCE OF RAIN AND SNOW
SHOWERS TONIGHT. CHANCE OF SNOW SHOWERS FRIDAY. WAVES 3 TO 5 FT
OCCASIONALLY TO 7 FT BUILDING TO 6 TO 9 FT OCCASIONALLY TO 11 FT
TONIGHT AND CONTINUING FRIDAY.

$$

RATZER


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