Great Lakes Forecast
Issued by NWS

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000
FZUS63 KLOT 302007
GLFLM

OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
307 PM CDT THU MAR 30 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.

LOW PRESSURE OF 29.5 INCHES OVER CENTRAL ILLINOIS WILL MOVE EAST
INTO OHIO OVERNIGHT...BEFORE REDEVELOPING OFF THE ATLANTIC COAST
FRIDAY NIGHT. HIGH PRESSURE OF 30.2 INCHES WILL BUILD SOUTHEAST
ACROSS THE UPPER MISSISSIPPI VALLEY AND WESTERN GREAT LAKES REGION
FRIDAY AND FRIDAY NIGHT. THE HIGH PRESSURE RIDGE WILL MOVE EAST OF
LAKE MICHIGAN LATE SATURDAY NIGHT...WHILE AN AREA OF LOW PRESSURE
OF 29.4 INCHES DEVELOPS ACROSS MANITOBA BY EARLY SUNDAY. THIS LOW
WILL FILL SLIGHTLY TO 29.5 INCHES AS IT PASSES NORTH OF LAKE
SUPERIOR MONDAY...WHILE ANOTHER LOW OF 29.5 INCHES MOVES ACROSS
THE LOWER MISSISSIPPI VALLEY. WEAK HIGH PRESSURE OF 30.0 INCHES
WILL MOVE ACROSS THE WESTERN LAKES TUESDAY...AHEAD OF ANOTHER LOW
PRESSURE SYSTEM MOVING INTO THE MIDWEST WEDNESDAY.

LMZ261-362-364-366-563-565-567-868-310315-
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-
307 PM CDT THU MAR 30 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TONIGHT...NORTHEAST WINDS TO 30 KT WITH OCCASIONAL GALE FORCE
GUSTS TO 35 KT. RAIN SHOWERS LIKELY WITH A CHANCE OF SNOW SHOWERS
THIS EVENING... THEN CHANCE OF RAIN AND SNOW SHOWERS OVERNIGHT.
WAVES 5 TO 8 FT OCCASIONALLY TO 10 FT.
.FRIDAY...NORTHEAST WINDS TO 30 KT. CHANCE OF RAIN AND SLIGHT
CHANCE OF SNOW IN THE MORNING. WAVES 6 TO 9 FT OCCASIONALLY TO
11 FT.
.FRIDAY NIGHT...NORTH WINDS 15 TO 25 KT DIMINISHING TO 10 TO
20 KT. WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT SUBSIDING TO 1 TO
3 FT.
.SATURDAY...NORTH WINDS 10 TO 20 KT BECOMING WEST 5 TO 10 KT IN
THE AFTERNOON. WAVES 1 TO 3 FT.
.SATURDAY NIGHT...NORTHWEST WINDS 5 TO 10 KT BECOMING NORTHEAST.
WAVES 1 FT OR LESS.
.SUNDAY...SOUTHEAST WINDS 5 TO 10 KT INCREASING TO 10 TO 15 KT.
WAVES 2 FT OR LESS.
.SUNDAY NIGHT...SOUTHEAST WINDS 10 TO 20 KT BECOMING SOUTH. RAIN
LIKELY. WAVES 1 TO 3 FT.
.MONDAY...SOUTH WINDS 10 TO 15 KT BECOMING WEST. CHANCE OF RAIN.
WAVES 1 TO 3 FT.
.TUESDAY...NORTH WINDS 10 TO 20 KT DIMINISHING TO 10 TO 15 KT.
WAVES 1 TO 3 FT.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-310315-
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-
307 PM CDT THU MAR 30 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TONIGHT...NORTHEAST WINDS TO 30 KT. RAIN SHOWERS LIKELY. WAVES
4 TO 7 FT OCCASIONALLY TO 9 FT.
.FRIDAY...NORTH WINDS TO 30 KT. CHANCE OF RAIN IN THE MORNING.
WAVES 6 TO 9 FT OCCASIONALLY TO 11 FT.
.FRIDAY NIGHT...NORTH WINDS TO 30 KT DIMINISHING TO 10 TO 20 KT.
WAVES 6 TO 9 FT OCCASIONALLY TO 11 FT SUBSIDING TO 3 TO 5 FT
OCCASIONALLY TO 7 FT.
.SATURDAY...NORTH WINDS 10 TO 20 KT DIMINISHING TO 10 TO 15 KT.
WAVES 2 TO 4 FT SUBSIDING TO 1 TO 3 FT.
.SATURDAY NIGHT...NORTH WINDS 5 TO 10 KT VEERING TO EAST. WAVES
1 TO 2 FT.
.SUNDAY...SOUTHEAST WINDS 5 TO 10 KT INCREASING TO 10 TO 15 KT.
CHANCE OF RAIN IN THE AFTERNOON. WAVES 1 TO 3 FT.
.SUNDAY NIGHT...SOUTHEAST WINDS 10 TO 20 KT. RAIN LIKELY. WAVES
1 TO 3 FT.
.MONDAY...EAST WINDS 10 TO 15 KT BACKING TO NORTH 10 TO 20 KT.
WAVES 1 TO 3 FT.
.TUESDAY...NORTH WINDS 10 TO 20 KT. WAVES 1 TO 3 FT.

$$

LMZ761-310315-
MAFOR 3021/
MICHIGAN NORTH 11246 11147 11146 12150 13140. CHANCE OF SNOW
SHOWERS EARLY THIS EVENING. CHANCE OF RAIN AND SNOW SHOWERS LATE
THIS EVENING. CHANCE OF RAIN LATE FRIDAY. WAVES 4 TO 7 FT
OCCASIONALLY TO 9 FT BUILDING TO 6 TO 9 FT OCCASIONALLY TO 11 FT
TONIGHT. WAVES 7 TO 10 FT OCCASIONALLY TO 13 FT FRIDAY.

MICHIGAN SOUTH 14146 11146 13840. CHANCE OF THUNDERSTORMS EARLY
THIS EVENING. CHANCE OF RAIN FRIDAY. WAVES 5 TO 8 FT OCCASIONALLY
TO 10 FT TONIGHT. WAVES 6 TO 9 FT OCCASIONALLY TO 11 FT BUILDING
TO 7 TO 10 FT OCCASIONALLY TO 13 FT FRIDAY.

$$

RATZER/ED F

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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