Great Lakes Forecast
Issued by NWS

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000
FZUS63 KLOT 121401
GLFLM

OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
901 AM CDT SAT APR 12 2014

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 29.6 INCHES OVER THE PLAINS...WILL MOVE
EAST ACROSS CENTRAL LAKE MICHIGAN LATE TONIGHT. A COLD FRONT
TRAINING BEHIND THIS LOW WILL BE DRAPED ACROSS THE SOUTHERN PART
OF THE LAKE ON SUNDAY. A SECOND LOW AT 29.5 INCHES WILL THEN MOVE
ALONG THIS FRONT...FROM EASTERN KANSAS SUNDAY AFTERNOON TO
SOUTHERN LAKE MICHIGAN BY LATE SUNDAY NIGHT. THIS LOW WILL THEN
CONTINUE TO MOVE NORTHEAST TO WESTERN QUEBEC BY MONDAY EVENING. A
STRONG PRESSURE GRADIENT BEHIND THIS LOW MAY RESULT IN A PERIOD OF
NORTHERLY GALES ACROSS THE LAKE SUNDAY NIGHT INTO MONDAY. HIGH
PRESSURE OF 30.2 INCHES WILL THEN BUILD OVER THE LAKE LATE TUESDAY
INTO EARLY WEDNESDAY.

LMZ261-362-364-563-122145-
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 ROCK ISLAND PASSAGE TO STURGEON BAY WI-
901 AM CDT SAT APR 12 2014

STURGEON BAY WI TO POINT BETSIE MI NORTH

.REST OF TODAY...EAST WINDS 10 TO 20 KT INCREASING TO 30 KT.
SHOWERS LIKELY THIS MORNING...THEN SHOWERS WITH A CHANCE OF
THUNDERSTORMS THIS AFTERNOON. WAVES 1 TO 3 FT BUILDING TO 3 TO 5
FT OCCASIONALLY TO 7 FT.
.TONIGHT...EAST WINDS 15 TO 25 KT BECOMING NORTH 10 TO 20 KT.
SHOWERS LIKELY WITH A CHANCE OF THUNDERSTORMS IN THE
EVENING...THEN CHANCE OF SHOWERS AND THUNDERSTORMS OVERNIGHT.
WAVES 3 TO 5 FT.
.SUNDAY...NORTH WINDS 15 TO 25 KT. SLIGHT CHANCE OF SHOWERS IN
THE MORNING...THEN SHOWERS LIKELY IN THE AFTERNOON. WAVES 3 TO 5 FT.
.SUNDAY NIGHT...NORTH WINDS TO 30 KT. SHOWERS IN THE EVENING...
THEN RAIN OR SNOW LIKELY OVERNIGHT. WAVES 4 TO 7 FT OCCASIONALLY
TO 9 FT.
.MONDAY...NORTH WINDS TO 30 KT. CHANCE OF RAIN OR SNOW IN THE
MORNING...THEN CHANCE OF RAIN IN THE AFTERNOON. WAVES 5 TO 8 FT
OCCASIONALLY TO 10 FT.
.MONDAY NIGHT...NORTHWEST WINDS EASING TO 15 TO 25 KT. SLIGHT
CHANCE OF RAIN OR SNOW. WAVES SUBSIDING TO 4 TO 6 FT OCCASIONALLY
TO 8 FT.
.TUESDAY...NORTH WINDS 15 TO 25 KT. SLIGHT CHANCE OF SNOW. WAVES
SUBSIDING TO 3 TO 5 FT.
.WEDNESDAY...SOUTHEAST WINDS 15 TO 25 KT. CHANCE OF RAIN OR SNOW.
WAVES 2 TO 4 FT.

WAVE FORECAST IS FOR ICE FREE AREAS

$$

LMZ366-565-567-669-868-870-122145-
LAKE MICHIGAN FROM POINT BETSIE TO MANISTEE MI 5 NM OFFSHORE TO
MID LAKE-
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 SHEBOYGAN TO PORT WASHINGTON WI 5 NM OFFSHORE
TO MID LAKE-
LAKE MICHIGAN FROM PENTWATER TO MANISTEE MI 5 NM OFFSHORE TO MID
LAKE-
LAKE MICHIGAN FROM WHITEHALL TO PENTWATER MI 5 NM OFFSHORE TO MID
LAKE-
901 AM CDT SAT APR 12 2014

STURGEON BAY WI TO POINT BETSIE MI SOUTH TO PORT WASHINGTON WI TO
WHITEHALL MI

.REST OF TODAY...EAST WINDS 10 TO 20 KT BECOMING SOUTHEAST 20 TO
25 KT. SLIGHT CHANCE OF SHOWERS THROUGH MID MORNING...THEN SHOWERS
LIKELY WITH A CHANCE OF THUNDERSTORMS LATE THIS MORNING. SHOWERS
AND THUNDERSTORMS LIKELY THIS AFTERNOON. WAVES 1 TO 3 FT BUILDING
TO 3 TO 5 FT OCCASIONALLY TO 7 FT.
.TONIGHT...SOUTH WINDS 15 TO 20 KT VEERING TO NORTH. SHOWERS AND
THUNDERSTORMS IN THE EVENING...THEN CHANCE OF SHOWERS AND
THUNDERSTORMS OVERNIGHT. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT
SUBSIDING TO 2 TO 4 FT LATE.
.SUNDAY...NORTH WINDS 15 TO 25 KT INCREASING TO 30 KT IN THE
AFTERNOON. CHANCE OF SHOWERS AND SLIGHT CHANCE OF THUNDERSTORMS IN
THE MORNING...THEN SHOWERS WITH A CHANCE OF THUNDERSTORMS IN THE
AFTERNOON. WAVES BUILDING TO 4 TO 6 FT OCCASIONALLY TO 8 FT.
.SUNDAY NIGHT...NORTH WINDS TO 30 KT INCREASING TO GALES TO 35 KT
OVERNIGHT. SHOWERS IN THE EVENING...THEN RAIN OR SNOW OVERNIGHT.
WAVES BUILDING TO 8 TO 11 FT OCCASIONALLY TO 14 FT.
.MONDAY...NORTH GALES TO 40 KT EASING TO 30 KT IN THE AFTERNOON.
CHANCE OF RAIN OR SNOW IN THE MORNING...THEN CHANCE OF RAIN IN THE
AFTERNOON. WAVES 8 TO 12 FT OCCASIONALLY TO 15 FT.
.MONDAY NIGHT...NORTH WINDS TO EASING TO 15 TO 25 KT. SLIGHT
CHANCE OF RAIN OR SNOW. WAVES SUBSIDING TO 5 TO 8 FT OCCASIONALLY
TO 10 FT.
.TUESDAY...NORTH WINDS 15 TO 25 KT BECOMING NORTHEAST 10 TO
20 KT. WAVES SUBSIDING TO 3 TO 5 FT.
.WEDNESDAY...SOUTHEAST WINDS 15 TO 25 KT. SLIGHT CHANCE OF RAIN
OR SNOW. WAVES 2 TO 4 FT.

WAVE FORECAST IS FOR ICE FREE AREAS

$$

LMZ080-671-673-675-777-779-872-874-876-878-122145-
LAKE MICHIGAN FROM MICHIGAN CITY IN TO ST. JOSEPH MI 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 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-
901 AM CDT SAT APR 12 2014

PORT WASHINGTON WI TO WHITEHALL MI SOUTH

.REST OF TODAY...SOUTH WINDS 15 TO 20 KT INCREASING TO AROUND 25 KT
THIS AFTERNOON. CHANCE OF SHOWERS AND THUNDERSTORMS FROM LATE
MORNING ON. WAVES 2 TO 4 FT BUILDING TO 4 TO 6 FT OCCASIONALLY TO
8 FT.
.TONIGHT...SOUTH WINDS 15 TO 25 KT BECOMING SOUTHWEST. SHOWERS AND
THUNDERSTORMS IN THE EVENING...THEN CHANCE OF SHOWERS AND
THUNDERSTORMS OVERNIGHT. WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT.
.SUNDAY...WEST WINDS 10 TO 20 KT VEERING TO NORTH. CHANCE OF
SHOWERS AND SLIGHT CHANCE OF THUNDERSTORMS IN THE MORNING...THEN
SHOWERS WITH A CHANCE OF THUNDERSTORMS IN THE AFTERNOON. WAVES
3 TO 5 FT OCCASIONALLY TO 7 FT.
.SUNDAY NIGHT...NORTH WINDS TO 30 KT INCREASING TO GALES TO 35 KT
BY DAYBREAK. SHOWERS WITH A CHANCE OF THUNDERSTORMS IN THE
EVENING...THEN RAIN OR SNOW OR SHOWERS OVERNIGHT. WAVES BUILDING
TO 8 TO 12 FT OCCASIONALLY TO 15 FT.
.MONDAY...NORTH GALES TO 40 KT EASING TO 30 KT IN THE AFTERNOON. RAIN
LIKELY OR CHANCE OF SNOW IN THE MORNING...THEN RAIN LIKELY IN THE
AFTERNOON. WAVES BUILDING TO 10 TO 14 FT OCCASIONALLY TO 18 FT.
.MONDAY NIGHT...NORTH WINDS EASING TO 15 TO 25 KT. SLIGHT CHANCE
OF RAIN OR SNOW. WAVES SUBSIDING TO 5 TO 8 FT OCCASIONALLY TO 10 FT.
.TUESDAY...NORTH WINDS 15 TO 25 KT DIMINISHING TO 10 TO 20 KT.
WAVES SUBSIDING TO 3 TO 5 FT.
.WEDNESDAY...SOUTHEAST WINDS 15 TO 25 KT. SLIGHT CHANCE OF RAIN
OR SNOW. WAVES 2 TO 4 FT.

WAVE FORECAST IS FOR ICE FREE AREAS

$$
LMZ761-122145-
MAFOR 1215/
MICHIGAN NORTH 11226 11239 11246 12236 11120 11820 11830. CHANCE
OF THUNDERSTORMS THIS AFTERNOON THROUGH SUNDAY. WAVES 1 TO 3 FT
BUILDING TO 3 TO 5 FT OCCASIONALLY TO 7 FT THIS AFTERNOON. WAVES 3 TO
5 FT OCCASIONALLY TO 7 FT TONIGHT AND SUNDAY MORNING.

MICHIGAN SOUTH 11420 12430 19440 12439 12530 11620. CHANCE OF
THUNDERSTORMS LATE TODAY THROUGH SUNDAY. WAVES 2 TO 4 FT BUILDING
TO 4 TO 6 FT OCCASIONALLY TO 8 FT THIS AFTERNOON. WAVES 4 TO 7 FT
OCCASIONALLY TO 9 FT TONIGHT. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT
SUNDAY MORNING.

$$

KJB






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