Great Lakes Forecast
Issued by NWS

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301
FZUS63 KLOT 210152
GLFLM

OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
852 PM CDT MON MAR 20 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...LOW PRESSURE OF 29.8 INCHES NORTH OF THE GREAT LAKES
WILL QUICKLY MOVE SO SOUTHERN QUEBEC BY EARLY AFTERNOON TUESDAY.
STRONG HIGH PRESSURE OF 30.7 INCHES WILL BUILD SOUTHEAST FROM THE
CANADIAN PRAIRIES INTO THE WESTERN GREAT LAKES TUESDAY NIGHT AND
BE CENTERED OVER THE GREAT LAKES BY WEDNESDAY. THIS HIGH WILL
THEN MOVE SOUTHEAST TO THE MID ATLANTIC COAST BY THURSDAY
AFTERNOON. LOW PRESSURE OF 29.4 INCHES IS WILL THEN DEVELOP OVER
THE CENTRAL PLAINS THURSDAY INTO FRIDAY.

LMZ261-362-364-366-563-565-567-868-210930-
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-
852 PM CDT MON MAR 20 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TONIGHT...NORTH WINDS 10 TO 15 KT VEERING WEST AFTER
MIDNIGHT AND INCREASING TO 15 TO 25 KT LATE. WAVES 2 TO 4 FT.
.TUESDAY...NORTHWEST WINDS TO 30 KT BECOMING NORTH BY EARLY
AFTERNOON. SLIGHT CHANCE OF SNOW SHOWERS IN THE AFTERNOON. WAVES
2 TO 4 FT BUILDING TO 4 TO 7 FT OCCASIONALLY TO 9 FT.
.TUESDAY NIGHT...NORTH WINDS TO 30 KT DIMINISHING TO 20 TO 25 KT
AFTER MIDNIGHT. WAVES 5 TO 8 FT OCCASIONALLY TO 10 FT SUBSIDING
TO 4 TO 7 FT OCCASIONALLY TO 9 FT.
.WEDNESDAY...NORTH WINDS 15 TO 25 KT DIMINISHING TO 10 TO 15 KT
IN THE AFTERNOON. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT SUBSIDING
TO 2 TO 4 FT.
.WEDNESDAY NIGHT...SOUTHEAST WINDS 10 TO 15 KT BECOMING SOUTH
10 TO 20 KT. WAVES 1 TO 3 FT.
.THURSDAY...SOUTH WINDS TO 30 KT. WAVES 3 TO 5 FT OCCASIONALLY TO
7 FT BUILDING TO 4 TO 6 FT OCCASIONALLY TO 8 FT.
.THURSDAY NIGHT...SOUTH WINDS 15 TO 25 KT. RAIN AND SNOW SHOWERS.
WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT.
.FRIDAY...SOUTHWEST WINDS 10 TO 15 KT VEERING TO NORTHEAST 10 TO
20 KT. RAIN AND SNOW SHOWERS LIKELY. WAVES 2 TO 4 FT.
.SATURDAY...NORTHEAST WINDS TO 30 KT. CHANCE OF RAIN AND SNOW
SHOWERS. WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-210930-
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-
852 PM CDT MON MAR 20 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TONIGHT...NORTH WINDS 15 TO 20 KT BECOMING NORTHWEST 10
TO 20 KT AFTER MIDNIGHT. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT
SUBSIDING TO 2 TO 4 FT AFTER MIDNIGHT.
.TUESDAY...NORTHWEST WINDS 15 TO 25 KT BECOMING NORTH TO 30 KT
EARLY IN THE AFTERNOON. WAVES 2 TO 4 FT BUILDING TO 4 TO 7 FT
OCCASIONALLY TO 9 FT.
.TUESDAY NIGHT...NORTH WINDS TO 30 KT BECOMING NORTHEAST BY LATE
EVENING. SCATTERED FLURRIES IN THE EVENING. WAVES 5 TO 8 FT
OCCASIONALLY TO 10 FT.
.WEDNESDAY...NORTHEAST WINDS 15 TO 25 KT DIMINISHING TO 10 TO
20 KT IN THE AFTERNOON. WAVES 5 TO 8 FT OCCASIONALLY TO 10 FT
SUBSIDING TO 3 TO 5 FT OCCASIONALLY TO 7 FT.
.WEDNESDAY NIGHT...NORTHEAST WINDS 10 TO 20 KT BECOMING SOUTHEAST
15 TO 25 KT. WAVES 2 TO 4 FT.
.THURSDAY...SOUTHEAST WINDS TO 30 KT BECOMING SOUTH. WAVES 4 TO
6 FT OCCASIONALLY TO 8 FT.
.THURSDAY NIGHT...SOUTH WINDS 15 TO 25 KT. RAIN SHOWERS. WAVES
3 TO 5 FT OCCASIONALLY TO 7 FT.
.FRIDAY...SOUTHWEST WINDS 15 TO 25 KT. CHANCE OF RAIN SHOWERS.
WAVES 2 TO 4 FT.
.SATURDAY...NORTHEAST WINDS TO 30 KT. RAIN SHOWERS LIKELY. WAVES
4 TO 6 FT OCCASIONALLY TO 8 FT.

$$
LMZ761-210930-
MAFOR 2103/
MICHIGAN NORTH 10810 11710 11620 11630 12740 13840. WAVES 2 TO 4
FT TONIGHT AND EARLY TUESDAY BUILDING TO 4 TO 7 FT OCCASIONALLY
TO 9 FT TUESDAY AFTERNOON...FURTHER BUILDING TO 5 TO 8 FT
OCCASIONALLY TO 10 FT EARLY TUESDAY EVENING.

MICHIGAN SOUTH 11820 14720 13840. WAVES 3 TO 5 FT OCCASIONALLY TO
7 FT SUBSIDING TO 2 TO 4 FT AFTER MIDNIGHT. WAVES BUILDING TO 4
TO 7 FT OCCASIONALLY TO 9 FT TUESDAY AFTERNOON...AND FURTHER
BUILDING TO 5 TO 8 FT OCCASIONALLY TO 10 FT EARLY TUESDAY EVENING.

$$

MTF

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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