Great Lakes Forecast
Issued by NWS

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000
FZUS63 KLOT 220141
GLFLM

OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
841 PM CDT SUN AUG 21 2016

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 RIDGE OF HIGH PRESSURE OF 30.1 MOVING OVER THE
MIDDLE AND UPPER MISSISSIPPI VALLEY WILL SLIDE EAST ACROSS THE
WESTERN GREAT LAKES TONIGHT TO THE EASTERN GREAT LAKES BY MONDAY
EVENING. A TROUGH OF LOW PRESSURE AVERAGING 29.7 INCHES IS
EXPECTED TO DEVELOP OVER THE WESTERN PLAINS TOMORROW. AS THE
RIDGE MOVES OFF TO THE EAST AND THE TROUGH DEVELOPS OVER THE
PLAINS...WINDS OVER THE LAKE WILL SET UP TO MORE SOUTHWESTERLY
THROUGH THE DAY MONDAY. BY TUESDAY NIGHT...THE HIGH WILL MOVE OFF
THE MID ATLANTIC COAST WHILE THE TROUGH LIFTS THROUGH THE NORTHERN
PLAINS. BY WEDNESDAY NIGHT...THE SFC TROUGH WILL REACH THE WESTERN
GREAT LAKES REGION...WITH AN ASSOCIATED COLD FRONT EXTENDING
SOUTHWEST INTO THE SOUTH HIGH PLAINS. THE COLD FRONT IS EXPECTED
TO SWEEP ACROSS LAKE MICHIGAN THURSDAY NIGHT OR FRIDAY.

LMZ261-362-364-366-563-565-567-868-220930-
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-
841 PM CDT SUN AUG 21 2016

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TONIGHT...NORTHWEST WINDS 10 TO 15 KT BECOMING WEST.
SLIGHT CHANCE OF SHOWERS THIS EVENING. WAVES 2 TO 4 FT.
.MONDAY...WEST WINDS 10 TO 20 KT BECOMING SOUTHWEST TO 30 KT.
WAVES 2 TO 4 FT BUILDING TO 3 TO 5 FT OCCASIONALLY TO 7 FT.
.MONDAY NIGHT...SOUTHWEST WINDS TO 30 KT DIMINISHING TO 15 TO
25 KT. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT.
.TUESDAY...SOUTHWEST WINDS TO 30 KT BECOMING SOUTH. WAVES 4 TO
7 FT OCCASIONALLY TO 9 FT BUILDING TO 5 TO 8 FT OCCASIONALLY TO
10 FT.
.TUESDAY NIGHT...SOUTH WINDS TO 30 KT DIMINISHING TO 15 TO 25 KT.
WAVES 5 TO 8 FT OCCASIONALLY TO 10 FT SUBSIDING TO 4 TO 6 FT
OCCASIONALLY TO 8 FT.
.WEDNESDAY...SOUTH WINDS TO 30 KT. CHANCE OF SHOWERS AND
THUNDERSTORMS. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT.
.WEDNESDAY NIGHT...SOUTHWEST WINDS 15 TO 25 KT DIMINISHING TO
10 TO 20 KT. CHANCE OF SHOWERS AND THUNDERSTORMS. WAVES 4 TO 6 FT
OCCASIONALLY TO 8 FT SUBSIDING TO 2 TO 4 FT.
.THURSDAY...WEST WINDS 10 TO 15 KT INCREASING TO 10 TO 20 KT.
WAVES 2 TO 4 FT.
.FRIDAY...NORTHWEST WINDS 10 TO 15 KT. WAVES 1 TO 3 FT.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-220930-
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-
841 PM CDT SUN AUG 21 2016

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TONIGHT...NORTHWEST WINDS 10 TO 20 KT DIMINISHING TO
10 TO 15 KT. SLIGHT CHANCE OF SHOWERS THIS EVENING. WAVES 3 TO
5 FT OCCASIONALLY TO 7 FT SUBSIDING TO 2 TO 4 FT.
.MONDAY...WEST WINDS 10 TO 15 KT BACKING TO SOUTHWEST 15 TO 25
KT. WAVES 2 TO 4 FT.
.MONDAY NIGHT...SOUTHWEST WINDS 15 TO 25 KT. WAVES 3 TO 5 FT
OCCASIONALLY TO 7 FT.
.TUESDAY...SOUTHWEST WINDS 15 TO 25 KT BECOMING SOUTH. WAVES 4 TO
6 FT OCCASIONALLY TO 8 FT.
.TUESDAY NIGHT...SOUTH WINDS 15 TO 25 KT. WAVES 4 TO 6 FT
OCCASIONALLY TO 8 FT.
.WEDNESDAY...SOUTH WINDS TO 30 KT. CHANCE OF SHOWERS AND
THUNDERSTORMS. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT.
.WEDNESDAY NIGHT...SOUTHWEST WINDS 15 TO 25 KT. SHOWERS AND
THUNDERSTORMS LIKELY. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT
SUBSIDING TO 2 TO 4 FT.
.THURSDAY...WEST WINDS 10 TO 15 KT INCREASING TO 10 TO 20 KT.
CHANCE OF SHOWERS AND THUNDERSTORMS. WAVES 2 TO 4 FT.
.FRIDAY...NORTHWEST WINDS 10 TO 15 KT BECOMING NORTH. WAVES 2 TO
4 FT.

$$
LMZ761-220930-
MAFOR 2203/
MICHIGAN NORTH 12710 11610 11620 11520 11530 12540. WAVES 2 TO 4
FT OVERNIGHT. WAVES 2 TO 4 FT BUILDING TO 3 TO 5 FT OCCASIONALLY
TO 7 FT MONDAY. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT MONDAY
EVENING.

MICHIGAN SOUTH 11720 12710 12610 11520 12530. WAVES 3 TO 5 FT
OCCASIONALLY TO 7 FT SUBSIDING TO 2 TO 4 FT OVERNIGHT. WAVES 2 TO
4 FT MONDAY. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT MONDAY EVENING.

$$


BMD

EXPERIMENTAL MODERNIZED OPEN LAKE FORECAST IS AVAILABLE ONLINE AT
WEATHER.GOV/LOT/GLFTABLE (ALL LOWER CASE)

GRAPHICAL MARINE FORECASTS ARE AVAILABLE ONLINE AT
WEATHER.GOV/GREATLAKES (ALL LOWER CASE)



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