Great Lakes Forecast
Issued by NWS

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000
FZUS63 KLOT 190802
GLFLM

OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
302 AM CDT MON SEP 19 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...HIGH PRESSURE OF 30.0 INCHES OVER THE OHIO VALLEY WILL
WILL REMAIN IN PLACE INTO TUESDAY...BLOCKED BY LOW PRESSURE OF
29.8 INCHES MOVING NORTH JUST OFF THE CAROLINA COAST. MEANWHILE...
LOW PRESSURE OF 29.3 INCHES IS OVER NORTHERN CANADA WITH AN
ASSOCIATED COLD FRONT EXTENDING SOUTH TO A WEAKER LOW 29.7 INCHES
OVER THE CENTRAL PLAINS. THE MAIN LOW OVER CANADA WILL MOVE TO
HUDSON BAY MONDAY NIGHT WHILE THE COLD FRONT MOVES ACROSS LAKE
MICHIGAN. THE COLD FRONT WILL DISSIPATE TUESDAY AS HIGH PRESSURE
SPREADING ACROSS THE MIDDLE AND UPPER MISSISSIPPI VALLEY MERGES
WITH THE HIGH PRESSURE OVER THE OHIO VALLEY. WEAK HIGH PRESSURE
WILL VERY SLOWLY SPREAD EAST ACROSS THE GREAT LAKES TO NEW ENGLAND
BY WEDNESDAY. ANOTHER LOW IS EXPECTED TO DEVELOP OVER THE CENTRAL
PLAINS BY MID WEEK...WITH A WARM FRONT EXTENDING EAST ACROSS THE
UPPER MIDWEST.

LMZ261-362-364-366-563-565-567-868-191545-
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-
302 AM CDT MON SEP 19 2016

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TODAY...SOUTHWEST WINDS TO 30 KT DIMINISHING TO 15 TO 25 KT.
SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS THIS MORNING...THEN
CHANCE OF SHOWERS AND THUNDERSTORMS THIS AFTERNOON. WAVES 4 TO
7 FT OCCASIONALLY TO 9 FT.
.TONIGHT...WEST WINDS 15 TO 25 KT BECOMING NORTHWEST 10 TO 20 KT.
CHANCE OF SHOWERS AND THUNDERSTORMS IN THE EVENING. WAVES 4 TO
6 FT OCCASIONALLY TO 8 FT SUBSIDING TO 3 TO 5 FT OCCASIONALLY TO
7 FT.
.TUESDAY...WEST WINDS 10 TO 20 KT BECOMING SOUTHWEST. WAVES 2 TO
4 FT.
.TUESDAY NIGHT...SOUTHWEST WINDS 15 TO 25 KT BECOMING SOUTH 10 TO
20 KT. WAVES 2 TO 4 FT.
.WEDNESDAY...SOUTH WINDS 10 TO 20 KT BECOMING SOUTHEAST. CHANCE
OF SHOWERS AND THUNDERSTORMS IN THE AFTERNOON. WAVES 1 TO 3 FT.
.WEDNESDAY NIGHT...SOUTHEAST WINDS 10 TO 20 KT BECOMING SOUTH.
SHOWERS AND THUNDERSTORMS LIKELY. WAVES 1 TO 3 FT.
.THURSDAY...SOUTH WINDS 10 TO 20 KT BACKING TO NORTHEAST. CHANCE
OF SHOWERS AND THUNDERSTORMS. WAVES 1 TO 3 FT.
.FRIDAY...NORTHEAST WINDS 10 TO 20 KT. CHANCE OF SHOWERS AND
THUNDERSTORMS. WAVES 2 TO 4 FT.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-191545-
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-
302 AM CDT MON SEP 19 2016

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TODAY...SOUTHWEST WINDS 15 TO 25 KT BECOMING SOUTH. SLIGHT
CHANCE OF SHOWERS AND THUNDERSTORMS THIS AFTERNOON. WAVES 4 TO
6 FT OCCASIONALLY TO 8 FT.
.TONIGHT...SOUTHWEST WINDS 15 TO 25 KT BECOMING WEST 10 TO 20 KT.
CHANCE OF SHOWERS AND THUNDERSTORMS IN THE EVENING... THEN SLIGHT
CHANCE OF SHOWERS AND THUNDERSTORMS OVERNIGHT. WAVES SUBSIDING TO 3
TO 5 FT OCCASIONALLY TO 7 FT.
.TUESDAY...NORTH WINDS 10 TO 20 KT. WAVES 2 TO 4 FT.
.TUESDAY NIGHT...NORTHEAST WINDS 10 TO 20 KT BECOMING EAST. WAVES
2 TO 4 FT.
.WEDNESDAY...SOUTH WINDS 10 TO 20 KT. WAVES 1 TO 3 FT.
.WEDNESDAY NIGHT...SOUTH WINDS 10 TO 20 KT. CHANCE OF SHOWERS AND
THUNDERSTORMS. WAVES 1 TO 3 FT.
.THURSDAY...SOUTH WINDS 10 TO 20 KT. CHANCE OF SHOWERS AND
THUNDERSTORMS. WAVES 1 TO 3 FT.
.FRIDAY...NORTHEAST WINDS 10 TO 20 KT. CHANCE OF SHOWERS AND
THUNDERSTORMS. WAVES 2 TO 4 FT.

$$

LMZ761-191545-
MAFOR 1909/
MICHIGAN NORTH 12540 13530 11630 12620. CHANCE OF SHOWERS AND
THUNDERSTORMS TODAY. WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT TODAY.
WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT SUBSIDING TO 3 TO 5 FT
OCCASIONALLY TO 7 FT TONIGHT.

MICHIGAN SOUTH 13530 12430 11530 11520 11620. SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS THIS AFTERNOON. CHANCE OF SHOWERS AND
THUNDERSTORMS LATE TONIGHT. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT
TODAY...SUBSIDING TO 3 TO 5 FT OCCASIONALLY TO 7 FT TONIGHT.

$$

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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