Great Lakes Forecast
Issued by NWS

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FZUS63 KLOT 231358
GLFLM

OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
858 AM CDT THU MAR 23 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 30.6 INCHES OVER THE EASTERN GREAT
LAKES REGION WILL MOVE SOUTHEAST TO THE MID ATLANTIC COAST BY
LATE THIS AFTERNOON. LOW PRESSURE OF 29.4 INCHES WILL THEN
DEVELOP OVER THE PLAINS TONIGHT INTO FRIDAY. AS THIS OCCURS...A
COLD FRONT WILL GRADUALLY SHIFT SOUTHWARD DOWN THE LAKE FRIDAY
BEFORE STALLING OUT NEAR THE SOUTHERN END OF THE LAKE SATURDAY
MORNING. THE LOW WILL WEAKEN TO AROUND 29.7 INCHES AS IT MOVES
SLOWLY NORTHEAST OVER NORTHERN ILLINOIS THIS WEEKEND.

LMZ261-362-364-366-563-565-567-868-232115-
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-
858 AM CDT THU MAR 23 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TODAY...SOUTH WINDS 15 TO 25 KT INCREASING TO 30 KT
AFTERNOON. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT BUILDING TO 4 TO
7 FT OCCASIONALLY TO 9 FT THIS AFTERNOON.
.TONIGHT...SOUTH WINDS 15 TO 25 KT. CHANCE OF RAIN SHOWERS IN THE
EVENING...THEN RAIN SHOWERS OVERNIGHT. WAVES 4 TO 7 FT
OCCASIONALLY TO 9 FT SUBSIDING TO 4 TO 6 FT OCCASIONALLY TO 8 FT
LATE.
.FRIDAY...SOUTHWEST WINDS 10 TO 15 KT VEERING TO NORTH 10 TO
20 KT. RAIN SHOWERS LIKELY IN THE MORNING...THEN RAIN SHOWERS IN
THE AFTERNOON. WAVES 2 TO 4 FT.
.FRIDAY NIGHT...NORTHEAST WINDS TO 30 KT. RAIN SHOWERS LIKELY IN
THE EVENING...THEN RAIN SHOWERS OVERNIGHT. WAVES 3 TO 5 FT
OCCASIONALLY TO 7 FT BUILDING TO 4 TO 6 FT OCCASIONALLY TO 8 FT
OVERNIGHT.
.SATURDAY...EAST WINDS TO 30 KT. CHANCE OF RAIN SHOWERS IN THE
MORNING...THEN RAIN SHOWERS LIKELY IN THE AFTERNOON. WAVES 4 TO
7 FT OCCASIONALLY TO 9 FT.
.SATURDAY NIGHT...EAST WINDS 15 TO 25 KT. RAIN SHOWERS LIKELY.
WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT SUBSIDING TO 3 TO 5 FT
OCCASIONALLY TO 7 FT OVERNIGHT.
.SUNDAY...NORTHEAST WINDS 10 TO 20 KT. CHANCE OF RAIN SHOWERS.
WAVES 2 TO 4 FT.
.MONDAY...NORTH WINDS 10 TO 15 KT. WAVES 1 TO 2 FT.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-232115-
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-
858 AM CDT THU MAR 23 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TODAY...SOUTHEAST WINDS 15 TO 25 KT INCREASING TO SOUTH
WINDS TO 30 KT. WAVES 3 TO 6 FT OCCASIONALLY TO 8 FT BUILDING TO
4 TO 7 FT OCCASIONALLY TO 9 FT THIS AFTERNOON.
.TONIGHT...SOUTH WINDS 15 TO 25 KT. CHANCE OF RAIN SHOWERS OR
SLIGHT CHANCE OF THUNDERSTORMS IN THE EVENING...THEN CHANCE OF
RAIN SHOWERS OVERNIGHT. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT
SUBSIDING TO 3 TO 5 FT OCCASIONALLY TO 7 FT LATE.
.FRIDAY...SOUTH WINDS 15 TO 25 KT. CHANCE OF RAIN SHOWERS. WAVES
3 TO 5 FT OCCASIONALLY TO 7 FT.
.FRIDAY NIGHT...EAST WINDS 10 TO 20 KT BECOMING NORTHEAST. PATCHY
DENSE FOG. RAIN SHOWERS LIKELY IN THE EVENING...THEN RAIN SHOWERS
OVERNIGHT. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT.
.SATURDAY...EAST WINDS 10 TO 20 KT. PATCHY DENSE FOG. RAIN
SHOWERS. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT.
.SATURDAY NIGHT...EAST WINDS 10 TO 20 KT. PATCHY DENSE FOG. RAIN
SHOWERS LIKELY. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT.
.SUNDAY...EAST WINDS 10 TO 15 KT. PATCHY DENSE FOG. RAIN SHOWERS
LIKELY. WAVES 2 TO 4 FT.
.MONDAY...NORTH WINDS 10 TO 15 KT. WAVES 1 TO 2 FT.

$$

LMZ761-232115-
MAFOR 2315/
MICHIGAN NORTH 11430 12440 11430 12436 11426 11516. CHANCE OF
RAIN SHOWERS LATE TONIGHT. WAVES BUILDING TO 4 TO 7 FT
OCCASIONALLY TO 9 FT TODAY, THEN SUBSIDING TO 3 TO 5 FT
OCCASIONALLY TO 7 FT LATE TONIGHT.


MICHIGAN SOUTH 12330 11440 14430 11430. CHANCE OF RAIN SHOWERS THIS
EVENING. CHANCE OF RAIN SHOWERS FRIDAY MORNING. WAVES 4 TO 7 FT
OCCASIONALLY TO 9 FT TODAY AND TONIGHT, SUBSIDING TO 3 TO 5 FT
OCCASIONALLY TO 7 FT BY FRIDAY MORNING.

$$


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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