Great Lakes Forecast
Issued by NWS

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000
FZUS63 KLOT 230752
GLFLM

OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
252 AM CDT SUN AUG 23 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...STRONG LOW PRESSURE FOR SUMMERTIME OF 29.3 INCHES IN
FAR WESTERN ONTARIO WILL MOVE SLOWLY EAST NORTHEAST THROUGH TODAY
AND THEN BROADEN AND VERY GRADUALLY WEAKEN JUST NORTH OF LAKE
SUPERIOR TONIGHT. AN ASSOCIATED COLD FRONT WILL MOVE EASTWARD
ACROSS THE LAKE EARLY THIS AFTERNOON. THE THEN EXPANSIVE LOW IS
EXPECTED TO REACH EASTERN ONTARIO AT 29.5 INCHES DURING MIDDAY
MONDAY. HIGH PRESSURE OF 30.1 INCHES ACROSS THE UPPER MIDWEST ON
TUESDAY NIGHT IS EXPECTED TO SLOWLY BUILD INTO THE WESTERN GREAT
LAKES REGION BY THURSDAY. THIS FEATURE WILL THEN SHIFT SLOWLY
SOUTHEAST DURING THE END OF THE WEEK.


LMZ261-362-364-366-563-565-567-868-231530-
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-
252 AM CDT SUN AUG 23 2015

SHEBOYGAN WI TO PENTWATER MI NORTH

.TODAY...SOUTH WINDS TO 30 KT BECOMING SOUTHWEST EARLY THIS
AFTERNOON...THEN WEST LATE. OCCASIONAL GALE FORCE GUSTS THIS
MORNING. SHOWERS AND SLIGHT CHANCE OF THUNDERSTORMS THIS
MORNING...THEN A CHANCE OF SHOWERS THIS AFTERNOON. WAVES 3 TO 6
FT OCCASIONALLY TO 8 FT BUILDING TO 5 TO 8 FT OCCASIONALLY TO 10
FT BY LATE MORNING.
.TONIGHT...WEST WINDS TO 30 KT. CHANCE OF SHOWERS. WAVES 4 TO
7 FT OCCASIONALLY TO 9 FT.
.MONDAY...WEST WINDS TO 30 KT. CHANCE OF SHOWERS IN THE MORNING...
THEN SHOWERS LIKELY IN THE AFTERNOON. WAVES 4 TO 7 FT
OCCASIONALLY TO 9 FT.
.MONDAY NIGHT...WEST WINDS TO 30 KT BECOMING NORTHWEST 20 TO 25
KT. SHOWERS LIKELY. WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT.
.TUESDAY...NORTHWEST WINDS 15 TO 25 KT DIMINISHING TO 10 TO
20 KT. CHANCE OF SHOWERS. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT.
.TUESDAY NIGHT...NORTHWEST WINDS 10 TO 20 KT. WAVES 3 TO 5 FT
OCCASIONALLY TO 7 FT.
.WEDNESDAY...NORTHWEST WINDS 10 TO 20 KT BECOMING NORTH 15 TO
25 KT. WAVES 2 TO 4 FT SUBSIDING TO 1 TO 3 FT.
.THURSDAY...NORTH WINDS 10 TO 15 KT BECOMING NORTHWEST. WAVES
AROUND 1 FT.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-231530-
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-
252 AM CDT SUN AUG 23 2015

SHEBOYGAN WI TO PENTWATER MI SOUTH

.TODAY...SOUTH WINDS 15 TO 25 KT BECOMING SOUTHWEST LATE THIS
MORNING...AND THEN WEST 20 TO 25 KT EARLY THIS AFTERNOON.
OCCASIONAL 30 KT GUSTS. CHANCE OF SHOWERS AND SLIGHT CHANCE OF
THUNDERSTORMS THIS MORNING. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT
BUILDING TO 4 TO 7 FT OCCASIONALLY TO 9 FT BY LATE MORNING.
.TONIGHT...WEST WINDS 20 TO 25 KT. OCCASIONAL 30 KT GUSTS. WAVES
4 TO 6 FT OCCASIONALLY TO 8 FT.
.MONDAY...WEST WINDS TO 30 KT. CHANCE OF SHOWERS. WAVES 4 TO 7 FT
OCCASIONALLY TO 9 FT.
.MONDAY NIGHT...NORTHWEST WINDS TO 30 KT DIMINISHING TO 20 TO 25
KT. WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT.
.TUESDAY...NORTHWEST WINDS 15 TO 25 KT DIMINISHING TO 10 TO
20 KT. WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT.
.TUESDAY NIGHT...NORTHWEST WINDS 10 TO 15 KT INCREASING TO 10 TO
20 KT. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT SUBSIDING TO 2 TO
4 FT.
.WEDNESDAY...NORTHWEST WINDS 10 TO 20 KT BECOMING NORTH. WAVES
1 TO 3 FT.
.THURSDAY...NORTH WINDS 10 TO 15 KT DIMINISHING TO 5 TO 10 KT.
WAVES 1 FT OR LESS.

$$

LMZ761-231530-
MAFOR 2309/
MICHIGAN NORTH 13446 19456 11540 14640. A CHANCE OF SHOWERS THIS
AFTERNOON. WAVES 3 TO 6 FT OCCASIONALLY TO 8 FT BUILDING TO 5 TO 8
FT OCCASIONALLY TO 10 FT BY LATE MORNING. WAVES 4 TO 7 FT
OCCASIONALLY TO 9 FT TONIGHT.

MICHIGAN SOUTH 12430 11530 19540 14630 19640 11630 19640. CHANCE
OF SHOWERS THIS MORNING. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT
BUILDING TO 4 TO 7 FT OCCASIONALLY TO 9 FT BY LATE MORNING. WAVES
4 TO 6 FT OCCASIONALLY TO 8 FT TONIGHT.

$$

MTF



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