Great Lakes Forecast
Issued by NWS

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000
FZUS63 KLOT 131950
GLFLM

OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
250 PM CDT WED AUG 13 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 WAS PULLING AWAY TO THE
NORTHEAST ACROSS SOUTHWEST QUEBEC THIS AFTERNOON...WITH A WEAK
COLD FRONT TRAILING ACROSS FAR SOUTHERN LAKE MICHIGAN. THIS FRONT
SHOULD CLEAR THE SOUTH END OF THE LAKE BY EVENING. HIGH PRESSURE
RIDGING AVERAGING 30.1 INCHES WEST OF THE MISSISSIPPI VALLEY WILL
DRIFT EAST TONIGHT...WHILE STRONGER HIGH PRESSURE OF 30.2 INCHES
OVER NORTHWESTERN ONTARIO BUILDS SOUTH ALONG THE RIDGE AND
WEAKENS TO 30.1 AS IT SPREADS ACROSS THE WESTERN LAKES ON
THURSDAY. THE CENTER OF THE HIGH WILL CONTINUE TO MOVE SOUTHEAST
INTO THE OHIO VALLEY THURSDAY NIGHT. TO THE NORTHWEST...A TROUGH
AVERAGING 29.7 INCHES FROM NORTHWEST ONTARIO TO THE CENTRAL PLAINS
WILL SLOWLY MOVE EAST SATURDAY...ACROSS THE WESTERN LAKES SATURDAY
NIGHT AND EARLY SUNDAY. A WEAK LOW OF 29.7 INCHES WILL DEVELOP
ALONG THE TROUGH OVER SOUTHERN ILLINOIS AND WILL MOVE NORTHEAST
TOWARD THE EASTERN LAKES SUNDAY AND SUNDAY NIGHT...WHILE WEAK HIGH
PRESSURE OF 30.0 INCHES SPREADS ACROSS THE UPPER MISSISSIPPI
VALLEY AND THE NORTHERN LAKES.

LMZ261-362-364-366-563-565-140345-
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-
250 PM CDT WED AUG 13 2014

TWO RIVERS WI TO MANISTEE MI NORTH

.TONIGHT...NORTHWEST WINDS 10 TO 20 KT EARLY BECOMING NORTH AT 15
TO 25 KT. WAVES 2 TO 4 FT BUILDING TO 4 TO 7 FT OCCASIONALLY TO 9
FT.
.THURSDAY...NORTH WINDS 15 TO 20 KT EASING TO 10 TO 15 KT BY LATE
AFTERNOON. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT SUBSIDING TO 3 TO
5 FT OCCASIONALLY TO 7 FT.
.THURSDAY NIGHT...NORTH WINDS 10 TO 15 KT BACKING TO WEST 5 TO
10 KT. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT SUBSIDING TO 1 TO 3
FT.
.FRIDAY...SOUTHWEST WINDS 5 TO 10 KT INCREASING TO 10 TO 20 KT.
SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS IN THE AFTERNOON. WAVES
1 TO 3 FT BUILDING TO 2 TO 4 FT.
.FRIDAY NIGHT...SOUTHWEST WINDS 15 TO 20 KT. CHANCE OF SHOWERS
AND THUNDERSTORMS. WAVES BUILDING TO 3 TO 5 FT OCCASIONALLY TO 7
FT.
.SATURDAY...SOUTHWEST WINDS 10 TO 15 KT. CHANCE OF SHOWERS AND
THUNDERSTORMS. WAVES 2 TO 4 FT.
.SATURDAY NIGHT...SOUTHWEST WINDS 10 TO 15 KT VEERING TO
NORTHWEST. CHANCE OF SHOWERS AND THUNDERSTORMS. WAVES 1 TO 3 FT.
.SUNDAY...NORTHEAST WINDS 10 TO 15 KT. WAVES 1 TO 3 FT.
.MONDAY...SOUTHEAST WINDS AROUND 10 KT. SLIGHT CHANCE OF SHOWERS
AND THUNDERSTORMS. WAVES 1 TO 2 FT.

$$

LMZ080-567-669-671-673-675-777-779-868-870-872-874-876-878-140345-
LAKE MICHIGAN FROM MICHIGAN CITY IN TO ST. JOSEPH MI 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 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 PENTWATER TO MANISTEE MI 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-
250 PM CDT WED AUG 13 2014

TWO RIVERS WI TO MANISTEE MI SOUTH

.TONIGHT...NORTH WINDS 10 TO 15 KT INCREASING TO 15 TO 20 KT.
WAVES 2 TO 4 FT BUILDING TO 4 TO 7 FT OCCASIONALLY TO 9 FT.
.THURSDAY...NORTH WINDS 10 TO 20 KT DIMINISHING TO 10 TO 15 KT AND
BECOMING NORTHEAST IN THE AFTERNOON. WAVES 4 TO 6 FT OCCASIONALLY
TO 8 FT SUBSIDING TO 2 TO 4 FT.
.THURSDAY NIGHT...NORTHEAST WINDS 5 TO 10 KT BACKING TO SOUTHWEST
10 TO 15 KT. WAVES 2 TO 4 FT SUBSIDING TO 1 TO 3 FT.
.FRIDAY...SOUTHWEST WINDS 10 TO 20 KT. SLIGHT CHANCE OF SHOWERS
AND THUNDERSTORMS IN THE AFTERNOON. WAVES 2 TO 4 FT.
.FRIDAY NIGHT...SOUTH WINDS 10 TO 20 KT. CHANCE OF SHOWERS AND
THUNDERSTORMS. WAVES 2 TO 4 FT.
.SATURDAY...SOUTH WINDS 10 TO 20 KT. CHANCE OF SHOWERS AND
THUNDERSTORMS. WAVES 2 TO 4 FT.
.SATURDAY NIGHT...SOUTH WINDS 10 TO 15 KT VEERING TO NORTHWEST.
CHANCE OF SHOWERS AND THUNDERSTORMS. WAVES 1 TO 3 FT.
.SUNDAY...NORTHEAST WINDS 10 TO 15 KT. SLIGHT CHANCE OF SHOWERS
AND THUNDERSTORMS. WAVES 1 TO 3 FT.
.MONDAY...SOUTHEAST WINDS 10 TO 20 KT. SLIGHT CHANCE OF SHOWERS
AND THUNDERSTORMS. WAVES 2 TO 4 FT.

$$

LMZ761-140345-
MAFOR 1321/
MICHIGAN NORTH 10720 14830 13820 11820. WAVES 2 TO 4 FT BUILDING
TO 4 TO 7 FT OCCASIONALLY TO 9 FT TONIGHT. WAVES 4 TO 7 FT
OCCASIONALLY TO 9 FT SUBSIDING TO 3 TO 5 FT OCCASIONALLY TO 7 FT
THURSDAY.

MICHIGAN SOUTH 11810 15820 11110. WAVES 2 TO 4 FT BUILDING TO 4
TO 7 FT OCCASIONALLY TO 9 FT TONIGHT. WAVES 4 TO 6 FT OCCASIONALLY
TO 8 FT SUBSIDING TO 2 TO 4 FT THURSDAY AFTERNOON.

$$

RATZER



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