Great Lakes Forecast
Issued by NWS

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000
FZUS63 KLOT 120755
GLFLM

OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
255 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 EASTERN SOUTH DAKOTA
WILL MOVE EAST ACROSS IOWA TODAY AND WISCONSIN TONIGHT REACHING
CENTRAL LAKE MICHIGAN DURING THE OVERNIGHT SATURDAY NIGHT.  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.

LMZ261-362-364-563-121530-
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-
255 AM CDT SAT APR 12 2014

STURGEON BAY WI TO POINT BETSIE MI NORTH

.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 2 TO 4 FT BUILDING TO 3 TO 5 FT.
.TONIGHT...NORTHEAST 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 BECOMING NORTHWEST GALES TO 35 KT
IN THE AFTERNOON. 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 TO 30 KT. SLIGHT CHANCE OF RAIN
OR SNOW. WAVES 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

$$

LMZ366-565-567-669-868-870-121530-
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-
255 AM CDT SAT APR 12 2014

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

.TODAY...EAST WINDS 10 TO 20 KT BECOMING SOUTHEAST TO 30 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 3 TO 5 FT BUILDING TO
4 TO 6 FT OCCASIONALLY TO 8 FT.
.TONIGHT...SOUTH WINDS 10 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 TO 30 KT. 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
OVERNIGHT. SHOWERS IN THE EVENING...THEN RAIN OR SNOW OVERNIGHT.
WAVES 8 TO 11 FT OCCASIONALLY TO 14 FT.
.MONDAY...NORTH GALES TO 40 KT. CHANCE OF RAIN OR SNOW IN THE
MORNING...THEN CHANCE OF RAIN IN THE AFTERNOON. WAVES 8 TO 11 FT
OCCASIONALLY TO 14 FT.
.MONDAY NIGHT...NORTH WINDS TO 30 KT. SLIGHT CHANCE OF RAIN OR
SNOW. WAVES 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

$$

LMZ080-671-673-675-777-779-872-874-876-878-121530-
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-
255 AM CDT SAT APR 12 2014

PORT WASHINGTON WI TO WHITEHALL MI SOUTH

.TODAY...SOUTH WINDS 10 TO 20 KT INCREASING TO 30 KT. CHANCE OF
SHOWERS AND THUNDERSTORMS FROM LATE MORNING ON. WAVES 3 TO 5 FT
BUILDING TO 4 TO 6 FT OCCASIONALLY TO 8 FT.
.TONIGHT...SOUTHWEST WINDS 15 TO 25 KT. 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. SHOWERS WITH A CHANCE OF
THUNDERSTORMS IN THE EVENING...THEN RAIN OR SNOW OR SHOWERS
OVERNIGHT. WAVES 8 TO 12 FT OCCASIONALLY TO 15 FT.
.MONDAY...NORTH GALES TO 40 KT. RAIN LIKELY OR CHANCE OF SNOW IN
THE MORNING...THEN RAIN LIKELY IN THE AFTERNOON. WAVES 8 TO 12 FT
OCCASIONALLY TO 15 FT.
.MONDAY NIGHT...NORTH WINDS TO 30 KT. SLIGHT CHANCE OF RAIN OR
SNOW. WAVES 6 TO 9 FT OCCASIONALLY TO 11 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

$$

LMZ761-121530-
MAFOR 1209/
MICHIGAN NORTH 11210 11220 11236 11249 12246 11236 11120. RAIN
SHOWERS WITH A CHANCE OF THUNDERSTORMS TODAY. RAIN SHOWERS LIKELY
LATE IN THE AFTERNOON. CHANCE OF THUNDERSTORMS. CHANCE OF RAIN
SHOWERS LATE THIS EVENING. WAVES 2 TO 4 FT BUILDING TO 3 TO 5 FT
OCCASIONALLY TO 7 FT TODAY. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT
SUBSIDING TO 2 TO 4 FT TONIGHT.

MICHIGAN SOUTH 11310 11320 11340 12440 11439 11449 11540. CHANCE OF
RAIN SHOWERS AND THUNDERSTORMS EARLY THIS MORNING. RAIN SHOWERS AND
THUNDERSTORMS LATE IN THE AFTERNOON THEN CHANCE OF RAIN SHOWERS AND
THUNDERSTORMS LATE THIS EVENING. WAVES 2 TO 4 FT BUILDING TO 4 TO
6 FT OCCASIONALLY TO 8 FT TODAY. WAVES 4 TO 7 FT OCCASIONALLY TO
9 FT SUBSIDING TO 3 TO 5 FT OCCASIONALLY TO 7 FT TONIGHT.

$$

ED F







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