Great Lakes Forecast
Issued by NWS

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FZUS63 KLOT 191345
GLFLM

OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
845 AM 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 BUILDING ACROSS THE
GREAT LAKES WILL SUPPORT NORTHERLY FLOW ON THE LAKE TODAY AND
EASTERLY FLOW TOMORROW. A LOW OF 29.5 INCHES WILL DEVELOP OVER THE
SOUTHERN HIGH PLAINS THIS AFTERNOON AND 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 EARLY NEXT WEEK.

LMZ261-362-364-366-563-565-192115-
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-
845 AM CDT FRI MAY 19 2017

TWO RIVERS WI TO MANISTEE MI NORTH...

.REST OF TODAY...NORTHEAST WINDS 15 TO 25 KT. WAVES 4 TO 6 FT
OCCASIONALLY TO 8 FT.
.TONIGHT...NORTHEAST WINDS 15 TO 25 KT BECOMING EAST 10 TO 20 KT.
WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT.
.SATURDAY...EAST WINDS 15 TO 25 KT INCREASING TO 30 KT. CHANCE OF
RAIN SHOWERS IN THE MORNING...THEN INTERMITTENT RAIN SHOWERS IN
THE AFTERNOON. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT.
.SATURDAY NIGHT...EAST WINDS TO 30 KT BECOMING SOUTHEAST 15 TO
25 KT. RAIN SHOWERS LIKELY WITH A CHANCE OF THUNDERSTORMS IN THE
EVENING...THEN RAIN SHOWERS LIKELY OVERNIGHT. WAVES 4 TO 6 FT
OCCASIONALLY TO 8 FT.
.SUNDAY...SOUTH WINDS 15 TO 25 KT BECOMING SOUTHWEST 10 TO 20 KT.
CHANCE OF RAIN SHOWERS IN THE MORNING. WAVES 2 TO 4 FT.
.SUNDAY NIGHT...SOUTHWEST WINDS 10 TO 20 KT. WAVES 2 TO 4 FT.
.MONDAY...SOUTHWEST WINDS 10 TO 20 KT. WAVES 2 TO 4 FT.
.TUESDAY...NORTHEAST WINDS 10 TO 20 KT INCREASING TO 15 TO 25 KT.
CHANCE OF RAIN SHOWERS. WAVES 1 TO 3 FT.

$$

LMZ080-567-669-671-673-675-777-779-868-870-872-874-876-878-192115-
LAKE MICHIGAN FROM MICHIGAN CITY IN TO ST. JOSEPH MI 5 NM
OFFSHORE TO MID LAKE-
LAKE MICHIGAN FROM TWO RIVERS TO SHEBOYGAN WI 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 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-
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-
845 AM CDT FRI MAY 19 2017

TWO RIVERS WI TO MANISTEE MI SOUTH...

.REST OF TODAY...NORTHEAST WINDS 15 TO 25 KT. CHANCE OF RAIN
SHOWERS. WAVES 5 TO 8 FT OCCASIONALLY TO 10 FT.
.TONIGHT...NORTHEAST WINDS 15 TO 25 KT BECOMING EAST. SLIGHT
CHANCE OF RAIN SHOWERS. WAVES 5 TO 8 FT OCCASIONALLY TO 10 FT.
.SATURDAY...EAST WINDS 15 TO 25 KT BECOMING SOUTHEAST TO 30 KT.
INTERMITTENT RAIN SHOWERS IN THE MORNING...THEN INTERMITTENT RAIN
SHOWERS WITH A CHANCE OF THUNDERSTORMS IN THE AFTERNOON. WAVES
4 TO 7 FT OCCASIONALLY TO 9 FT.
.SATURDAY NIGHT...SOUTHEAST WINDS 15 TO 25 KT BECOMING SOUTH
10 TO 20 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.
.SUNDAY...SOUTHWEST WINDS 10 TO 20 KT. WAVES 2 TO 4 FT.
.SUNDAY NIGHT...WEST WINDS 10 TO 20 KT BECOMING SOUTHWEST. WAVES
2 TO 4 FT.
.MONDAY...SOUTHWEST WINDS 10 TO 20 KT. WAVES 2 TO 4 FT.
.TUESDAY...SOUTHEAST WINDS 10 TO 20 KT BACKING TO NORTHEAST 15 TO
25 KT. CHANCE OF RAIN SHOWERS. WAVES 1 TO 3 FT.

$$
LMZ761-192115-
MAFOR 1915/
MICHIGAN NORTH 14130 11130 12220 11230. CHANCE OF SHOWERS
SATURDAY MORNING. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT.

MICHIGAN SOUTH 14130 13230 11236. CHANCE OF SHOWERS TODAY. WAVES
5 TO 8 FT OCCASIONALLY TO 10 FT TODAY AND TONIGHT. WAVES SUBSIDING
TO 4 TO 7 FT OCCASIONALLY TO 9 FT SATURDAY MORNING.

$$


KJB

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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