Great Lakes Forecast
Issued by NWS

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FZUS63 KLOT 160149
GLFLM

OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
849 PM CDT MON MAY 15 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...HIGH PRESSURE OF 30.0 INCHES CENTERED OVER THE
THE EASTERN LAKES WILL SHIFT TO THE EAST COAST EARLY WEDNESDAY.
LOW PRESSURE OF 29.4 INCHES WILL TAKE SHAPE ACROSS THE CENTRAL
PLAINS OVERNIGHT...AND WILL LIFT INTO MINNESOTA THROUGH TUESDAY.
A WARM FRONT EXTENDING SOUTHEAST OF THIS LOW WILL LIFT ACROSS THE
WESTERN LAKES BY TUESDAY NIGHT AS THE LOW MOVES INTO ONTARIO AND
DEEPENS SLIGHTLY TO 29.3 INCHES. ANOTHER LOW OF 29.3 INCHES WILL
DEVELOP OVER THE PLAINS BY EARLY WEDNESDAY...AND WILL ALSO LIFT
TO THE NORTHERN LAKES BY THURSDAY MORNING WHILE WEAKENING TO 29.5
INCHES. THIS LOW WILL CONTINUE TO FILL AS IT MOVES INTO QUEBEC
THURSDAY NIGHT WHILE SENDING A COLD FRONT THROUGH THE WESTERN
LAKES.

LMZ261-362-364-366-563-565-567-868-160930-
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-
849 PM CDT MON MAY 15 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TONIGHT...SOUTHEAST WINDS 10 TO 20 KT BECOMING SOUTH
15 TO 25 KT. CHANCE OF RAIN SHOWERS AND THUNDERSTORMS. WAVES 1 TO
3 FT.
.TUESDAY...SOUTH WINDS TO 30 KT. CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE MORNING...THEN SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE AFTERNOON. WAVES 3 TO 5 FT OCCASIONALLY TO 7
FT.
.TUESDAY NIGHT...SOUTH WINDS TO 30 KT. WAVES 4 TO 7 FT
OCCASIONALLY TO 9 FT.
.WEDNESDAY...SOUTH WINDS TO 30 KT. CHANCE OF SHOWERS IN THE
MORNING...THEN CHANCE OF SHOWERS AND THUNDERSTORMS IN THE
AFTERNOON. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT.
.WEDNESDAY NIGHT...SOUTH WINDS TO 30 KT. CHANCE OF SHOWERS AND
THUNDERSTORMS. WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT.
.THURSDAY...SOUTHWEST WINDS TO 30 KT BECOMING NORTHWEST 15 TO 25
KT. CHANCE OF SHOWERS IN THE MORNING. WAVES 4 TO 6 FT
OCCASIONALLY TO 8 FT IN THE AFTERNOON.
.THURSDAY NIGHT...NORTH WINDS TO 30 KT. WAVES 4 TO 6 FT
OCCASIONALLY TO 8 FT.
.FRIDAY...NORTHEAST WINDS 15 TO 25 KT. WAVES 4 TO 6 FT
OCCASIONALLY TO 8 FT.
.SATURDAY...EAST WINDS 15 TO 25 KT. CHANCE OF SHOWERS. WAVES 2 TO
4 FT.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-160930-
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-
849 PM CDT MON MAY 15 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TONIGHT...SOUTHEAST WINDS 10 TO 20 KT BECOMING SOUTH
15 TO 25 KT. CHANCE OF SHOWERS AND THUNDERSTORMS. WAVES 2 TO
4 FT.
.TUESDAY...SOUTH WINDS INCREASING TO 30 KT. WAVES 3 TO 5 FT
OCCASIONALLY TO 7 FT.
.TUESDAY NIGHT...SOUTH WINDS 15 TO 25 KT. WAVES 3 TO 5 FT
OCCASIONALLY TO 7 FT.
.WEDNESDAY...SOUTH WINDS 15 TO 25 KT. WAVES 4 TO 6 FT
OCCASIONALLY TO 8 FT.
.WEDNESDAY NIGHT...SOUTH WINDS TO 30 KT. CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE EVENING. WAVES 4 TO 7 FT OCCASIONALLY TO
9 FT.
.THURSDAY...SOUTHWEST WINDS 15 TO 25 KT SHIFTING TO NORTH LATE.
WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT.
.THURSDAY NIGHT...NORTH WINDS TO 30 KT. WAVES 3 TO 5 FT
OCCASIONALLY TO 7 FT BUILDING TO 4 TO 6 FT OCCASIONALLY TO 8 FT
OVERNIGHT.
.FRIDAY...NORTHEAST WINDS 15 TO 25 KT. CHANCE OF SHOWERS. WAVES 4
TO 7 FT OCCASIONALLY TO 9 FT.
.SATURDAY...SOUTHEAST WINDS 10 TO 20 KT. SHOWERS LIKELY. WAVES 3
TO 5 FT OCCASIONALLY TO 7 FT.

$$
LMZ761-160930-
MAFOR 1603/
MICHIGAN NORTH 11320 11330 11430 11429 11430 13440. CHANCE OF
SHOWERS AND THUNDERSTORMS OVERNIGHT AND LATE TUESDAY. WAVES 2 TO
4 FT OVERNIGHT...BUILDING TO 3 TO 5 FT OCCASIONALLY TO 7 FT
TUESDAY. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT TUESDAY EVENING.


MICHIGAN SOUTH 11330 11439 13430 12440 11430. CHANCE OF SHOWERS
AND THUNDERSTORMS OVERNIGHT. WAVES 2 TO 4 FT OVERNIGHT...BUILDING
TO 3 TO 5 FT OCCASIONALLY TO 7 FT TUESDAY AND TUESDAY EVENING.

$$

LENNING

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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