Great Lakes Forecast
Issued by NWS

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897
FZUS63 KLOT 261950
GLFLM

OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
250 PM CDT SUN MAR 26 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 OVER THE WISCONSIN AND
ILLINOIS BORDER AREA WILL SLOWLY MOVE TO CENTRAL LAKE MICHIGAN
THIS EVENING AND ONWARD TO LAKE HURON BY DAYBREAK MONDAY. A SECOND
LOW PRESSURE OF 29.6 INCHES OVER THE SOUTHERN PLAINS WILL TRACK
EAST TO THE MIDDLE MISSISSIPPI VALLEY MONDAY AFTERNOON AND UP THE
OHIO VALLEY MONDAY NIGHT INTO TUESDAY...SLOWLY WEAKENING AS IT
DOES SO. HIGH PRESSURE AVERAGING 30.3 INCHES CENTERED OVER ONTARIO
WILL THEN BUILD INTO THE GREAT LAKES REGION TUESDAY AND
WEDNESDAY.

LMZ261-362-364-366-563-565-567-868-270330-
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-
250 PM CDT SUN MAR 26 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TONIGHT...NORTHEAST WINDS 10 TO 20 KT BECOMING NORTH EARLY THIS
EVENING...AND THEN NORTHWEST LATE. AREAS OF FOG DEVELOPING. RAIN
LIKELY THIS EVENING...THEN CHANCE OF RAIN OVERNIGHT. WAVES 2 TO 4
FT.
.MONDAY...NORTHWEST WINDS 10 TO 15 KT BECOMING NORTH IN THE
AFTERNOON. PATCHY FOG IN THE MORNING. SLIGHT CHANCE OF RAIN.
WAVES 1 TO 3 FT.
.MONDAY NIGHT...NORTH WINDS 10 TO 20 KT INCREASING TO 15 TO
25 KT AFTER MIDNIGHT. WAVES BUILDING TO 3 TO 5 FT OCCASIONALLY TO
7 FT.
.TUESDAY...NORTH WINDS 15 TO 25 KT. WAVES 3 TO 5 FT OCCASIONALLY
TO 7 FT.
.TUESDAY NIGHT...NORTH WINDS 15 TO 25 KT BECOMING NORTHEAST 10 TO
20 KT. WAVES SUBSIDING TO 2 TO 4 FT.
.WEDNESDAY...NORTHEAST WINDS 10 TO 20 KT. WAVES 2 TO 4 FT.
.WEDNESDAY NIGHT...EAST WINDS 10 TO 20 KT. WAVES 2 TO 4 FT.
.THURSDAY...EAST WINDS 10 TO 20 KT INCREASING TO 15 TO 25 KT.
CHANCE OF RAIN. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT.
.FRIDAY...NORTHEAST WINDS TO 30 KT. CHANCE OF RAIN. WAVES 5 TO
8 FT OCCASIONALLY TO 10 FT.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-270330-
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-
250 PM CDT SUN MAR 26 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

...DENSE FOG ADVISORY IN EFFECT UNTIL 9 AM CDT MONDAY...

.TONIGHT...SOUTHWEST WINDS 10 TO 20 KT VEERING TO NORTHWEST BY
EARLY OVERNIGHT AND DIMINISHING TO 10 TO 15 KT LATE. AREAS OF
DENSE FOG. CHANCE OF RAIN...MAINLY THIS EVENING. WAVES 2 TO 4 FT
SUBSIDING TO 1 TO 3 FT.
.MONDAY...NORTH WINDS 10 TO 15 KT INCREASING TO 10 TO 20 KT LATE
IN THE AFTERNOON. PATCHY FOG IN THE MORNING. CHANCE OF RAIN IN
THE AFTERNOON. WAVES 1 TO 3 FT BUILDING TO 2 TO 4 FT.
.MONDAY NIGHT...NORTH WINDS 10 TO 20 KT QUICKLY INCREASING TO 15
TO 25 KT. CHANCE OF RAIN IN THE EVENING. WAVES BUILDING TO 4 TO 7
FT OCCASIONALLY TO 9 FT.
.TUESDAY...NORTH WINDS 15 TO 25 KT. WAVES 4 TO 7 FT OCCASIONALLY
TO 9 FT.
.TUESDAY NIGHT...NORTH WINDS 15 TO 25 KT BECOMING NORTHEAST.
WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT.
.WEDNESDAY...NORTHEAST WINDS 10 TO 20 KT. WAVES 3 TO 5 FT
OCCASIONALLY TO 7 FT.
.WEDNESDAY NIGHT...NORTHEAST WINDS 15 TO 25 KT BECOMING EAST.
WAVES BUILDING TO 4 TO 6 FT OCCASIONALLY TO 8 FT.
.THURSDAY...EAST WINDS TO 30 KT. RAIN LIKELY. WAVES 4 TO 7 FT
OCCASIONALLY TO 9 FT.
.FRIDAY...NORTHEAST WINDS 15 TO 25 KT BECOMING NORTH TO 30 KT.
RAIN LIKELY. WAVES BUILDING TO 5 TO 8 FT OCCASIONALLY TO 10 FT.

$$

LMZ761-270330-
MAFOR 2621/
MICHIGAN NORTH 11126 12826 11823 11723 12713 11810. CHANCE OF
RAIN OVERNIGHT. WAVES 2 TO 4 FT SUBSIDING TO 1 TO 3 FT EARLY
MONDAY MORNING.

MICHIGAN SOUTH 12524 11624 11724 11714 11814 12813. CHANCE OF
RAIN THIS EVENING. WAVES 2 TO 4 FT SUBSIDING TO 1 TO 3 FT TONIGHT.
WAVES BUILDING BACK TO 2 TO 4 FT MONDAY AFTERNOON.

$$

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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