Great Lakes Forecast
Issued by NWS

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677
FZUS63 KLOT 211537
GLFLM

OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
1037 AM CDT THU JUL 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...HIGH PRESSURE OF 30.3 INCHES OVER THE MID ATLANTIC
COAST THIS MORNING WILL MOVE SLOWLY EAST TODAY WHILE LOW PRESSURE
OF 29.5 INCHES OVER HUDSON BAY MOVES SLOWLY SOUTHEAST. THE LOW
WILL MOVE TO THE CANADIAN MARITIME PROVINCES FRIDAY WHILE A
TRAILING COLD FRONT MOVES ACROSS LAKE MICHIGAN. ANOTHER LOW OF
29.7 INCHES OVER THE NORTHERN PLAINS AND CANADIAN PRAIRIES
SATURDAY WILL LIFT ACROSS SUNDAY AND SUNDAY NIGHT WHILE ANOTHER
COLD FRONT PUSHES ACROSS LAKE MICHIGAN. HIGH PRESSURE OF 30.1
INCHES WILL BUILD OVER THE WESTERN GREAT LAKES TUESDAY AND EASTERN
LAKES WEDNESDAY.

LMZ261-563-565-567-212115-
LAKE MICHIGAN FROM SEUL CHOIX POINT TO ROCK ISLAND PASSAGE 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-
1037 AM CDT THU JUL 21 2016

SHEBOYGAN WI TO PENTWATER MI NORTH...

...SEVERE THUNDERSTORM WATCH 404 IN EFFECT UNTIL 11 AM CDT THIS
MORNING...

.REST OF TODAY...SOUTHWEST WINDS 15 TO 25 KT BECOMING SOUTH TO
30 KT. AREAS OF FOG. SHOWERS AND THUNDERSTORMS LIKELY LATE THIS
MORNING...THEN CHANCE OF SHOWERS AND THUNDERSTORMS THIS
AFTERNOON. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT.
.TONIGHT...SOUTHWEST WINDS 15 TO 25 KT DIMINISHING TO 10 TO 20 KT
LATE IN THE EVENING...THEN BECOMING WEST 10 TO 15 KT OVERNIGHT.
CHANCE OF SHOWERS AND THUNDERSTORMS IN THE EVENING... THEN SLIGHT
CHANCE OF SHOWERS AND THUNDERSTORMS OVERNIGHT. WAVES 4 TO 6 FT
OCCASIONALLY TO 8 FT SUBSIDING TO 2 TO 4 FT.
.FRIDAY...NORTHWEST WINDS 5 TO 10 KT BACKING TO SOUTHWEST. WAVES
1 TO 2 FT.
.FRIDAY NIGHT...WEST WINDS LESS THAN 10 KT BECOMING NORTH. WAVES
1 FT OR LESS.
.SATURDAY...NORTHEAST WINDS LESS THAN 10 KT BECOMING EAST. WAVES
1 FT OR LESS.
.SATURDAY NIGHT...EAST WINDS 5 TO 10 KT BECOMING SOUTHEAST.
SHOWERS AND THUNDERSTORMS LIKELY. WAVES 1 TO 2 FT.
.SUNDAY...SOUTH WINDS 10 TO 20 KT BECOMING SOUTHWEST. CHANCE OF
SHOWERS AND THUNDERSTORMS. WAVES 1 TO 3 FT.
.MONDAY...WEST WINDS 10 TO 15 KT BECOMING NORTHWEST. WAVES 1 TO
2 FT.

$$

LMZ362-364-366-669-671-673-868-870-872-874-212115-
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 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 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-
1037 AM CDT THU JUL 21 2016

SHEBOYGAN WI TO PENTWATER MI SOUTH TO WIND POINT WI TO HOLLAND
MI...

...SEVERE THUNDERSTORM WATCH 405 IN EFFECT UNTIL 4 PM CDT THIS
AFTERNOON...

.REST OF TODAY...SOUTHWEST WINDS TO 30 KT. CHANCE OF SHOWERS AND
THUNDERSTORMS. AREAS OF FOG THIS AFTERNOON. WAVES 4 TO 6 FT
OCCASIONALLY TO 8 FT.
.TONIGHT...SOUTHWEST WINDS 15 TO 25 KT DIMINISHING TO 10 TO 20 KT
LATE IN THE EVENING...THEN BECOMING SOUTHWEST 10 TO 20 KT AFTER
MIDNIGHT BECOMING WEST 10 TO 15 KT LATE. CHANCE OF SHOWERS AND
THUNDERSTORMS. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT SUBSIDING TO
2 TO 4 FT.
.FRIDAY...WEST WINDS 5 TO 10 KT. WAVES 1 TO 2 FT.
.FRIDAY NIGHT...NORTHWEST WINDS 5 TO 10 KT BECOMING NORTH. WAVES
1 FT OR LESS.
.SATURDAY...NORTHEAST WINDS LESS THAN 10 KT BECOMING NORTH. WAVES
1 FT OR LESS.
.SATURDAY NIGHT...EAST WINDS 5 TO 10 KT BECOMING SOUTH. CHANCE OF
SHOWERS AND THUNDERSTORMS. WAVES 1 TO 2 FT.
.SUNDAY...SOUTH WINDS 10 TO 20 KT BECOMING SOUTHWEST. CHANCE OF
SHOWERS AND THUNDERSTORMS. WAVES 2 TO 4 FT.
.MONDAY...WEST WINDS 10 TO 20 KT BECOMING NORTHWEST 10 TO 15 KT.
WAVES 1 TO 3 FT.

$$

LMZ080-675-777-779-876-878-212115-
LAKE MICHIGAN FROM MICHIGAN CITY IN TO ST. JOSEPH MI 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 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-
1037 AM CDT THU JUL 21 2016

WIND POINT WI TO HOLLAND MI SOUTH...

.REST OF TODAY...SOUTH WINDS 10 TO 20 KT BECOMING SOUTHWEST.
CHANCE OF SHOWERS AND THUNDERSTORMS. WAVES 1 TO 3 FT.
.TONIGHT...SOUTHWEST WINDS 10 TO 20 KT DIMINISHING TO 10 TO
15 KT. CHANCE OF SHOWERS AND THUNDERSTORMS. WAVES 1 TO 3 FT.
.FRIDAY...SOUTHWEST WINDS 10 TO 15 KT BECOMING WEST. CHANCE OF
SHOWERS AND THUNDERSTORMS. WAVES 1 TO 3 FT.
.FRIDAY NIGHT...NORTH WINDS LESS THAN 10 KT. WAVES 1 FT OR LESS.
.SATURDAY...NORTHEAST WINDS LESS THAN 10 KT INCREASING TO 5 TO
10 KT. WAVES 1 FT OR LESS.
.SATURDAY NIGHT...EAST WINDS LESS THAN 10 KT BECOMING SOUTHEAST.
CHANCE OF SHOWERS AND THUNDERSTORMS. WAVES 1 TO 2 FT.
.SUNDAY...SOUTH WINDS 10 TO 20 KT BECOMING SOUTHWEST. CHANCE OF
SHOWERS AND THUNDERSTORMS. WAVES 1 TO 3 FT.
.MONDAY...NORTHWEST WINDS 10 TO 15 KT. WAVES 1 TO 3 FT.

$$

LMZ761-212115-
MAFOR 2115/
MICHIGAN NORTH...SEVERE THUNDERSTORM WATCH IN EFFECT...11539
12543 11530 11520 11620 11610 11600. CHANCE OF SHOWERS AND
THUNDERSTORMS TODAY AND TONIGHT. WAVES 3 TO 5 FT OCCASIONALLY TO
7 FT BUILDING TO 4 TO 7 FT OCCASIONALLY TO 9 FT TODAY. WAVES 4 TO
7 FT OCCASIONALLY TO 9 FT SUBSIDING TO 2 TO 4 FT TONIGHT. WAVES 1
TO 3 FT FRIDAY MORNING.

MICHIGAN SOUTH...SEVERE THUNDERSTORM WATCH IN EFFECT...12530
11420 11520 13510 11610. CHANCE OF SHOWERS AND THUNDERSTORMS
TODAY...TONIGHT...AND FRIDAY MORNING. WAVES 2 TO 4 FT BUILDING TO
3 TO 5 FT OCCASIONALLY TO 7 FT TODAY. WAVES 3 TO 5 FT
OCCASIONALLY TO 7 FT SUBSIDING TO 2 TO 4 FT TONIGHT. WAVES 1 TO 3
FT FRIDAY MORNING.

$$



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