Great Lakes Forecast
Issued by NWS

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FZUS63 KLOT 192004 CCA
GLFLM

OPEN LAKE FORECAST FOR LAKE MICHIGAN...CORRECTED
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
259 PM CDT FRI SEP 19 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...A LARGE AREA OF HIGH PRESSURE OF 30.4 INCHES CENTERED
OVER EASTERN NEW ENGLAND WILL SLIDE OFF THE COAST TONIGHT. AN
AREA OF LOW PRESSURE AVERAGING 29.4 INCHES OVER HUDSON BAY WILL
SLIDE EAST TO WESTERN ONTARIO TONIGHT WITH A TRAILING FRONTAL
BOUNDARY STRETCHING SOUTH THROUGH THE CENTRAL PLAINS. ANOTHER LOW
PRESSURE AVERAGING 29.5 INCHES IS EXPECTED TO DEVELOP LATE TONIGHT
INTO EARLY SATURDAY ALONG THE FRONT...OVER LAKE SUPERIOR. THIS LOW
WILL THEN LIFT TO THE NORTHEAST ACROSS QUEBEC SATURDAY AFTERNOON
AND EVENING WHILE DRAGGING THE COLD FRONT ACROSS THE LAKE. ANOTHER
LOW AVERAGING 29.6 INCHES WILL FORM ALONG THE FRONTAL TROUGH OVER
LAKE MICHIGAN ON SATURDAY NIGHT AND MOVE INTO THE EASTERN LAKES ON
SUNDAY. MEANWHILE...HIGH PRESSURE OF 30.2 INCHES WILL SPREAD
ACROSS THE CENTRAL PLAINS AND WESTERN GREAT LAKES REGION SUNDAY
AND THEN THE OHIO VALLEY ON MONDAY. THE HIGH WILL SLOWLY SPREAD
EASTWARD THROUGH MID WEEK.

LMZ261-362-364-366-563-565-567-669-868-870-200345-
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 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-
259 PM CDT FRI SEP 19 2014

PORT WASHINGTON WI TO WHITEHALL MI NORTH

...GALE WARNING IN EFFECT THROUGH SATURDAY MORNING...

.TONIGHT...SOUTH GALES TO 35 KT BECOMING SOUTHWEST. CHANCE OF
SHOWERS AND SLIGHT CHANCE OF THUNDERSTORMS THIS EVENING...THEN
SHOWERS AND THUNDERSTORMS LIKELY OVERNIGHT. WAVES 6 TO 9 FT
OCCASIONALLY TO 11 FT BUILDING TO 8 TO 12 FT OCCASIONALLY TO 15
FT.
.SATURDAY...SOUTHWEST GALES TO 35 KT DIMINISHING TO 30 KT... THEN
BECOMING WEST 10 TO 20 KT LATE. CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE MORNING...THEN SHOWERS AND THUNDERSTORMS
LIKELY IN THE AFTERNOON. WAVES 8 TO 12 FT OCCASIONALLY TO 15 FT
SUBSIDING TO 5 TO 8 FT OCCASIONALLY TO 10 FT LATE.
.SATURDAY NIGHT...NORTHWEST WINDS 10 TO 20 KT BECOMING NORTHEAST
10 TO 15 KT. CHANCE OF SHOWERS. WAVES SUBSIDING TO 3 TO 5 FT
OCCASIONALLY TO 7 FT FROM LATE EVENING ON.
.SUNDAY...NORTH WINDS 15 TO 25 KT WITH GUSTS TO 30 KT. CHANCE OF
SHOWERS. WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT.
.SUNDAY NIGHT...NORTH WINDS 20 TO 25 KT EASING TO 10 TO 15 KT LATE.
WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT.
.MONDAY...NORTHWEST WINDS 10 TO 15 KT BECOMING WEST 10 TO 20 KT.
WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT SUBSIDING TO 2 TO 4 FT.
.MONDAY NIGHT...WEST WINDS 10 TO 20 KT BECOMING NORTHWEST. WAVES
2 TO 4 FT.
.TUESDAY...NORTH WINDS 10 TO 15 KT BECOMING NORTHEAST. WAVES 2 TO
4 FT.
.WEDNESDAY...SOUTH WINDS 10 TO 15 KT. WAVES 1 TO 2 FT.

$$

LMZ080-671-673-675-777-779-872-874-876-878-200345-
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-
259 PM CDT FRI SEP 19 2014

PORT WASHINGTON WI TO WHITEHALL MI SOUTH

.TONIGHT...SOUTH WINDS 15 TO 25 KT WITH A FEW GUSTS TO 30 KT
INCREASING TO 30 KT AND BECOMING SOUTHWEST. A FEW GALE FORCE GUSTS
TO 35 KT THIS EVENING. CHANCE OF SHOWERS AND THUNDERSTORMS
OVERNIGHT. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT BUILDING TO 6 TO 9
FT OCCASIONALLY TO 11 FT TONIGHT.
.SATURDAY...SOUTHWEST WINDS TO 30 KT EASING TO 15 TO 20 KT LATE.
CHANCE OF SHOWERS AND THUNDERSTORMS IN THE MORNING...THEN SHOWERS
AND THUNDERSTORMS LIKELY IN THE AFTERNOON. WAVES 6 TO 9 FT
OCCASIONALLY TO 11 FT SUBSIDING TO 4 TO 7 FT OCCASIONALLY TO 9 FT
LATE.
.SATURDAY NIGHT...WEST WINDS 10 TO 20 KT INCREASING TO 20 TO 25 KT
LATE. CHANCE OF SHOWERS AND THUNDERSTORMS IN THE EVENING...THEN
SLIGHT CHANCE OF SHOWERS OVERNIGHT. WAVES 4 TO 7 FT OCCASIONALLY
TO 9 FT SUBSIDING TO 3 TO 5 FT OCCASIONALLY TO 7 FT OVERNIGHT.
.SUNDAY...NORTHWEST WINDS TO 30 KT BECOMING NORTH. SLIGHT CHANCE
OF SHOWERS. WAVES BUILDING TO 5 TO 8 FT OCCASIONALLY TO 10 FT.
.SUNDAY NIGHT...NORTH WINDS TO 30 KT EASING TO 10 TO 20 KT. WAVES
5 TO 8 FT OCCASIONALLY TO 10 FT SUBSIDING TO 4 TO 6 FT
OCCASIONALLY TO 8 FT.
.MONDAY...NORTHWEST WINDS 10 TO 15 KT BECOMING WEST. WAVES SUBSIDING
TO 2 TO 4 FT LATE.
.MONDAY NIGHT...WEST WINDS 10 TO 15 KT. WAVES 2 TO 4 FT.
.TUESDAY...NORTHWEST WINDS 10 TO 15 KT BECOMING NORTH. WAVES 1 TO
3 FT.
.WEDNESDAY...SOUTHEAST WINDS 10 TO 15 KT. WAVES 1 TO 2 FT.

$$

LMZ761-200345-
MAFOR 1921/
MICHIGAN NORTH...GALE WARNING IN EFFECT...
13450 12559 11550 11540 11549. CHANCE OF SHOWERS THIS EVENING.
CHANCE OF SHOWERS AND THUNDERSTORMS SATURDAY MORNING. WAVES 6 TO
9 FT OCCASIONALLY TO 11 FT BUILDING TO 8 TO 12 FT OCCASIONALLY TO
15 FT TONIGHT AND THEN SUBSIDING TO 5 TO 8 FT OCCASIONALLY TO 10
FT SATURDAY AFTERNOON.

MICHIGAN SOUTH...11430 19440 12440 19450 11540 13540 11539.
CHANCE OF SHOWERS AND THUNDERSTORMS LATE THIS EVENING. CHANCE OF
SHOWERS AND THUNDERSTORMS SATURDAY. WAVES 4 TO 6 FT OCCASIONALLY
TO 8 FT BUILDING TO 6 TO 9 FT OCCASIONALLY TO 11 FT TONIGHT. WAVES
6 TO 9 FT OCCASIONALLY TO 11 FT SATURDAY.

$$

RC





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