Great Lakes Forecast
Issued by NWS

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894
FZUS63 KLOT 191951
GLFLM

OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
251 PM CDT FRI MAY 19 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 30.4 INCHES ACROSS LAKE SUPERIOR
TODAY WILL SLOWLY SHIFT EAST ACROSS ONTARIO AND QUEBEC OVER THE
COMING DAYS. LOW PRESSURE OF 29.5 INCHES WILL DEVELOP OVER THE
SOUTHERN HIGH PLAINS WILL TRACK INTO IOWA BY SATURDAY AFTERNOON.
THE LOW IS EXPECTED TO THEN LIFT INTO ONTARIO ON SUNDAY...PUSHING
A COLD FRONT AHEAD OF IT ACROSS THE LAKE SATURDAY NIGHT. BEHIND
THE FRONT...SOUTHWESTERLY FLOW THEN PERSISTS ACROSS THE LAKE INTO
MONDAY. ANOTHER LOW AROUND 29.6 INCHES WILL APPROACH LAKE
MICHIGAN ON TUESDAY AND WILL SEND A COLD FRONT ACROSS THE LAKE.

LMZ261-362-364-366-563-565-567-868-200330-
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-
251 PM CDT FRI MAY 19 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TONIGHT...NORTHEAST WINDS 15 TO 25 KT SHIFTING EAST OVERNIGHT.
WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT SUBSIDING TO 3 TO 5 FT
OCCASIONALLY TO 7 FT OVERNIGHT.
.SATURDAY...EAST WINDS TO 30 KT. CHANCE OF SHOWERS IN THE
MORNING...THEN SHOWERS WITH CHANCE OF THUNDERSTORMS IN THE
AFTERNOON. WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT.
.SATURDAY NIGHT...SOUTHEAST WINDS TO 30 KT. SHOWERS WITH A CHANCE
OF THUNDERSTORMS IN THE EVENING...THEN SHOWERS LIKELY OVERNIGHT.
WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT SUBSIDING TO 3 TO 5 FT
OCCASIONALLY TO 7 FT OVERNIGHT.
.SUNDAY...SOUTH WINDS TO 30 KT BECOMING SOUTHWEST 15 TO 25 KT.
CHANCE OF RAIN SHOWERS IN THE MORNING. WAVES 2 TO 4 FT.
.SUNDAY NIGHT...SOUTHWEST WINDS 15 TO 25 KT. WAVES 2 TO 4 FT.
.MONDAY...SOUTHWEST WINDS 10 TO 20 KT. WAVES 2 TO 4 FT.
.MONDAY NIGHT...WEST WINDS 10 TO 15 KT BECOMING NORTHWEST. WAVES
1 TO 3 FT.
.TUESDAY...NORTHEAST WINDS 10 TO 15 KT BECOMING NORTH 15 TO 25 KT
IN THE AFTERNOON. CHANCE OF SHOWERS. WAVES 1 TO 3 FT BUILDING TO
3 TO 5 FT OCCASIONALLY TO 7 FT IN THE AFTERNOON.
.WEDNESDAY...NORTH WINDS TO 30 KT. CHANCE OF SHOWERS. WAVES 4 TO
7 FT OCCASIONALLY TO 9 FT.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-200330-
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-
251 PM CDT FRI MAY 19 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TONIGHT...EAST WINDS 15 TO 25 KT. SLIGHT CHANCE OF SHOWERS THIS
EVENING. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT.
.SATURDAY...EAST WINDS 15 TO 25 KT. SHOWERS LIKELY WITH A CHANCE
OF THUNDERSTORMS. WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT.
.SATURDAY NIGHT...SOUTH WINDS 15 TO 25 KT. SHOWERS LIKELY WITH A
CHANCE OF THUNDERSTORMS IN THE EVENING...THEN CHANCE OF SHOWERS
OVERNIGHT. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT SUBSIDING TO 3 TO
5 FT OCCASIONALLY TO 7 FT OVERNIGHT.
.SUNDAY...SOUTHWEST WINDS 10 TO 20 KT. WAVES 2 TO 4 FT.
.SUNDAY NIGHT...WEST WINDS 15 TO 25 KT. WAVES 2 TO 4 FT.
.MONDAY...SOUTHWEST WINDS 15 TO 25 KT. WAVES 2 TO 4 FT.
.MONDAY NIGHT...SOUTHWEST WINDS 10 TO 20 KT. CHANCE OF SHOWERS.
WAVES 1 TO 3 FT.
.TUESDAY...SOUTHEAST WINDS 10 TO 20 KT BECOMING EAST 15 TO 25 KT.
RAIN SHOWERS LIKELY. WAVES 1 TO 2 FT BUILDING TO 2 TO 4 FT IN THE
AFTERNOON.
.WEDNESDAY...NORTH WINDS TO 30 KT. CHANCE OF SHOWERS. WAVES 6 TO
9 FT OCCASIONALLY TO 11 FT.

$$

LMZ761-200330-
MAFOR 1921/
MICHIGAN NORTH 14130 13230 11246. CHANCE OF SHOWERS LATE, THEN
CHANCE OF THUNDERSTORMS SATURDAY. WAVES 4 TO 6 FT OCCASIONALLY TO
8 FT SUBSIDING TO 3 TO 5 FT OCCASIONALLY TO 7 FT, THEN BUILDING
TO 4 TO 7 FT OCCASIONALLY TO 9 FT SATURDAY.

MICHIGAN SOUTH 11146 11130 14230 12236. CHANCE OF SHOWERS EARLY
THIS EVENING. CHANCE OF THUNDERSTORMS SATURDAY. WAVES 4 TO 7 FT
OCCASIONALLY TO 9 FT.

$$


KMD

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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