Great Lakes Forecast
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FZUS63 KLOT 171342
GLFLM

OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
842 AM CDT WED MAY 17 2017

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 OF THE HIGHEST 1/3 OF THE WAVE, ALONG WITH THE
AVERAGE HEIGHT OF THE HIGHEST 10% OF THE WAVES WHICH WILL
OCCASIONALLY BE ENCOUNTERED.

.SYNOPSIS...LOW PRESSURE OF 29.4 INCHES NEAR JAMES BAY WILL
CONTINUE TO PULL AWAY FROM THE REGION TODAY...WHILE ANOTHER LOW OF
29.2 INCHES DEVELOPS OVER THE HIGH PLAINS AND MOVES TO WESTERN
IOWA BY THIS EVENING. THE LOW WILL THEN WEAKEN TO 29.5 INCHES AS
IT CONTINUES TO LIFT NORTHEAST ACROSS NORTHERN WISCONSIN
TONIGHT...AND TO 29.6 INCHES AFTER CROSSING NORTHERN LAKE MICHIGAN
AND MOVING ACROSS NORTHERN LOWER MICHIGAN BY THURSDAY AFTERNOON.
A COLD FRONT TRAILING FROM THE LOW WILL PUSH SOUTH OF THE LAKE BY
THURSDAY EVENING...AS HIGH PRESSURE OF 30.4 INCHES BUILDS INTO THE
UPPER MIDWEST AND NORTHERN GREAT LAKES. THE HIGH WILL CONTINUE TO
STRENGTHEN TO 30.5 INCHES FRIDAY AS THE CENTER SPREADS EAST
ACROSS THE NORTHERN LAKES...EVENTUALLY REACHING SOUTHERN QUEBEC
AND THE EASTERN LAKES BY SATURDAY MORNING.

LMZ261-362-364-366-563-565-567-868-172145-
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-
842 AM CDT WED MAY 17 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TODAY...SOUTH WINDS 15 TO 25 KT. CHANCE OF SHOWERS AND
THUNDERSTORMS THIS AFTERNOON. WAVES 4 TO 6 FT OCCASIONALLY TO 8
FT.
.TONIGHT...SOUTH WINDS 15 TO 25 KT. CHANCE OF SHOWERS AND
THUNDERSTORMS. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT.
.THURSDAY...SOUTHWEST WINDS 15 TO 25 KT VEERING TO NORTH TO
30 KT. CHANCE OF SHOWERS AND THUNDERSTORMS. WAVES 4 TO 7 FT
OCCASIONALLY TO 9 FT.
.THURSDAY NIGHT...NORTH WINDS TO 30 KT. WAVES 5 TO 8 FT
OCCASIONALLY TO 10 FT.
.FRIDAY...NORTHEAST WINDS TO 30 KT DIMINISHING TO 15 TO 25 KT.
WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT.
.FRIDAY NIGHT...NORTHEAST WINDS 15 TO 25 KT BECOMING EAST 10 TO
20 KT. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT SUBSIDING TO 2 TO
4 FT.
.SATURDAY...EAST WINDS 10 TO 20 KT. CHANCE OF RAIN SHOWERS AND
THUNDERSTORMS. WAVES 2 TO 4 FT.
.SUNDAY...SOUTH WINDS 10 TO 20 KT VEERING TO WEST. CHANCE OF RAIN
SHOWERS AND THUNDERSTORMS. WAVES 2 TO 4 FT.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-172145-
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-
842 AM CDT WED MAY 17 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TODAY...SOUTH WINDS 15 TO 25 KT INCREASING TO 30 KT.
SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS THIS AFTERNOON. WAVES
4 TO 6 FT OCCASIONALLY TO 8 FT.
.TONIGHT...SOUTH WINDS TO 30 KT. 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.
.THURSDAY...SOUTH WINDS TO 30 KT VEERING TO NORTHWEST. WAVES 4 TO
7 FT OCCASIONALLY TO 9 FT SUBSIDING TO 3 TO 5 FT OCCASIONALLY TO
7 FT.
.THURSDAY NIGHT...NORTH WINDS TO 30 KT. WAVES BUILDING TO 5 TO 8
FT OCCASIONALLY TO 10 FT.
.FRIDAY...NORTHEAST WINDS TO 30 KT BECOMING NORTH 15 TO 25 KT.
WAVES 5 TO 8 FT OCCASIONALLY TO 10 FT SUBSIDING TO 4 TO 6 FT
OCCASIONALLY TO 8 FT.
.FRIDAY NIGHT...NORTHEAST WINDS 15 TO 25 KT BECOMING EAST. WAVES
4 TO 6 FT OCCASIONALLY TO 8 FT.
.SATURDAY...EAST WINDS 15 TO 25 KT BECOMING SOUTHEAST 10 TO
20 KT. SHOWERS AND THUNDERSTORMS LIKELY. WAVES 4 TO 6 FT
OCCASIONALLY TO 8 FT SUBSIDING TO 2 TO 4 FT.
.SUNDAY...SOUTHWEST WINDS 10 TO 20 KT BECOMING WEST. CHANCE OF
SHOWERS AND THUNDERSTORMS. WAVES 2 TO 4 FT.

$$
LMZ761-172145-
MAFOR 1715/
MICHIGAN NORTH 15430 11430 11530. CHANCE OF SHOWERS AND
THUNDERSTORMS THIS AFTERNOON THROUGH THURSDAY MORNING. WAVES 4 TO
6 FT OCCASIONALLY TO 8 FT TODAY AND TONIGHT. WAVES 4 TO 7 FT
OCCASIONALLY TO 9 FT THURSDAY MORNING.

MICHIGAN SOUTH 11430 15440 11440. CHANCE OF SHOWERS AND
THUNDERSTORMS THIS EVENING. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT
TODAY AND TONIGHT. WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT THURSDAY
MORNING.

$$

BMD

EXPERIMENTAL MODERNIZED OPEN LAKE FORECAST IS AVAILABLE ONLINE AT
WEATHER.GOV/LOT/GLFTABLE

GRAPHICAL MARINE FORECASTS ARE AVAILABLE ONLINE AT:
WEATHER.GOV/GREATLAKES



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