Great Lakes Forecast
Issued by NWS

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000
FZUS63 KLOT 201413
GLFLM

OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
913 AM CDT SAT AUG 20 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...AN AREA OF LOW PRESSURE AVERAGING 29.6 INCHES
ACORSS CENTRAL WISCSONSIN WILL LIFT NORTHEAST AND DEEPEN TO 29.4 INCHES
AS IT CROSSES NORTHEAST LAKE SUPERIOR LATE THIS AFTERNOON. A
STRONG COLD FRONT WILL SWEEP ACROSS LAKE MICHIGAN WITH HIGH
PRESSURE THEN BUILDING IN FROM THE WEST AVERAGING 30.1 INCHES AND
BECOMING CENTERED OVER THE UPPER MIDWEST AND PLAINS SUNDAY
MORNING.

LMZ261-362-364-563-202115-
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-
913 AM CDT SAT AUG 20 2016

STURGEON BAY WI TO POINT BETSIE MI NORTH...

...GALE WARNING IN EFFECT FROM THIS EVENING THROUGH SUNDAY
MORNING...

.REST OF TODAY...EAST WINDS 10 TO 20 KT BECOMING SOUTHEAST TO 30
KT EARLY THIS AFTERNOON THEN BECOMING SOUTH LATE. SHOWERS AND SCATTERED
THUNDERSTORMS. WAVES 1 TO 3 FT BUILDING TO 3 TO 5 FT OCCASIONALLY
TO 7 FT.
.TONIGHT...SOUTHWEST WINDS TO 30 KT BECOMING WEST GALES TO 35 KT.
SHOWERS LIKELY WITH A CHANCE OF THUNDERSTORMS IN THE EVENING...
THEN CHANCE OF SHOWERS OVERNIGHT. WAVES 4 TO 7 FT OCCASIONALLY TO
9 FT BUILDING TO 6 TO 9 FT OCCASIONALLY TO 11 FT.
.SUNDAY...NORTHWEST GALES TO 35 KT DIMINISHING TO 30 KT. CHANCE
OF SHOWERS. WAVES 6 TO 9 FT OCCASIONALLY TO 11 FT SUBSIDING TO 4
TO 6 FT OCCASIONALLY TO 8 FT.
.SUNDAY NIGHT...NORTHWEST WINDS 15 TO 25 KT DIMINISHING TO 10 TO
15 KT OVERNIGHT. WAVES SUBSIDING TO 2 TO 4 FT.
.MONDAY...WEST WINDS 10 TO 15 KT BECOMING SOUTHWEST 15 TO 25 KT
IN THE AFTERNOON. WAVES 1 TO 3 FT.
.MONDAY NIGHT...SOUTHWEST WINDS TO 30 KT. WAVES BUILDING TO 3 TO
5 FT OCCASIONALLY TO 7 FT.
.TUESDAY...SOUTHWEST WINDS TO 30 KT. WAVES 4 TO 6 FT OCCASIONALLY
TO 8 FT.
.WEDNESDAY...SOUTH WINDS TO 30 KT BECOMING SOUTHWEST. WAVES 3 TO
5 FT OCCASIONALLY TO 7 FT.

$$

LMZ366-565-567-868-202115-
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 PENTWATER TO MANISTEE MI 5 NM OFFSHORE TO MID
LAKE-
913 AM CDT SAT AUG 20 2016

STURGEON BAY WI TO POINT BETSIE MI SOUTH TO SHEBOYGAN WI TO
PENTWATER MI...

.REST OF TODAY...SOUTHEAST WINDS 15 TO 25 KT BECOMING SOUTH LATE
THIS MORNING...THEN INCREASING TO 30 KT AND TURNING SOUTHWEST THIS
AFTERNOON. SHOWERS AND SCATTERED THUNDERSTORMS. WAVES 2 TO 4 FT
BUILDING TO 4 TO 6 FT OCCASIONALLY TO 8 FT.
.TONIGHT...SOUTHWEST WINDS TO 30 KT BECOMING WEST. OCCASIONAL GALE
FORCE GUSTS TO 35 KT. CHANCE OF SHOWERS AND THUNDERSTORMS IN THE
EVENING... THEN CHANCE OF SHOWERS OVERNIGHT. WAVES 5 TO 8 FT
OCCASIONALLY TO 10 FT.
.SUNDAY...NORTHWEST WINDS TO 30 KT DIMINISHING TO 10 TO 20 KT.
OCCASIONAL GALE FORCE GUSTS TO 35 KT IN THE MORNING. CHANCE OF
SHOWERS. WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT SUBSIDING TO 3 TO 5
FT OCCASIONALLY TO 7 FT.
.SUNDAY NIGHT...NORTHWEST WINDS 10 TO 20 KT DIMINISHING TO 10 TO
15 KT. WAVES 2 TO 4 FT.
.MONDAY...WEST WINDS 5 TO 10 KT BECOMING SOUTHWEST 10 TO 20 KT IN
THE AFTERNOON. WAVES 1 TO 3 FT.
.MONDAY NIGHT...SOUTHWEST WINDS 15 TO 25 KT. WAVES 2 TO 4 FT.
.TUESDAY...SOUTHWEST WINDS 15 TO 25 KT BECOMING SOUTH. 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.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-202115-
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-
913 AM CDT SAT AUG 20 2016

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TODAY...SOUTHEAST WINDS 15 TO 25 KT BECOMING SOUTHWEST
TO 30 KT. SHOWERS AND SCATTERED THUNDERSTORMS THROUGH MID
MORNING...THEN SCATTERED SHOWERS THIS AFTERNOON. WAVES 2 TO 4 FT
BUILDING TO 4 TO 7 FT OCCASIONALLY TO 9 FT.
.TONIGHT...WEST WINDS TO 30 KT. OCCASIONAL GALE FORCE GUSTS TO 35
KT. CHANCE OF SHOWERS IN THE EVENING...THEN SLIGHT CHANCE OF
SHOWERS OVERNIGHT. WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT BUILDING
TO 5 TO 8 FT OCCASIONALLY TO 10 FT.
.SUNDAY...WEST WINDS TO 30 KT BECOMING NORTHWEST 10 TO 20 KT.
OCCASIONAL GALE FORCE GUSTS TO 35 KT EARLY IN THE MORNING. WAVES
4 TO 7 FT OCCASIONALLY TO 9 FT SUBSIDING TO 4 TO 6 FT OCCASIONALLY
TO 8 FT.
.SUNDAY NIGHT...NORTHWEST WINDS 10 TO 20 KT. WAVES 3 TO 5 FT
OCCASIONALLY TO 7 FT SUBSIDING TO 2 TO 4 FT.
.MONDAY...WEST WINDS 10 TO 15 KT BECOMING SOUTHWEST 10 TO 20 KT.
WAVES 1 TO 3 FT.
.MONDAY NIGHT...SOUTH WINDS 10 TO 20 KT BECOMING SOUTHWEST 15 TO
25 KT. WAVES 2 TO 4 FT.
.TUESDAY...SOUTH WINDS 10 TO 20 KT. WAVES 3 TO 5 FT OCCASIONALLY
TO 7 FT.
.WEDNESDAY...SOUTH WINDS 15 TO 25 KT. CHANCE OF SHOWERS AND
THUNDERSTORMS. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT.

$$
LMZ761-202115-
MAFOR 2015/
MICHIGAN NORTH...GALE WARNING IN EFFECT...11236 11336 11446 11546
13650 11750. SHOWERS AND SCATTERED THUNDERSTORMS. WAVES 2 TO 4 FT
BUILDING TO 4 TO 7 FT OCCASIONALLY TO 9 FT TODAY. WAVES BUILDING
TO 5 TO 8 FT OCCASIONALLY TO 10 FT TONIGHT.

MICHIGAN SOUTH 11346 11446 11546 11640 11650 13640. SCATTERED
THUNDERSTORMS TODAY. CHANCE OF SHOWERS LATE TONIGHT. WAVES 2 TO 4
FT BUILDING TO 4 TO 7 FT OCCASIONALLY TO 9 FT TODAY. WAVES 4 TO 7
FT OCCASIONALLY TO 9 FT BUILDING TO 5 TO 8 FT OCCASIONALLY TO 10
FT TONIGHT.

$$


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

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



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