Great Lakes Forecast
Issued by NWS

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259
FZUS63 KLOT 230927 CCA
GLFLM

OPEN LAKE FORECAST FOR LAKE MICHIGAN...CORRECTED
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
427 AM CDT TUE MAY 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 30.0 INCHES ACROSS THE OHIO VALLEY
WILL SHIFT TO THE NORTHEAST TODAY WHILE LOW PRESSURE OF 29.6
INCHES OVER WESTERN QUEBEC MOVES SLOWLY EAST. ANOTHER WEAK LOW
AROUND 29.8 INCHES OVER THE UPPER MIDWEST WILL MEANDER ACROSS THE
WESTERN AND CENTRAL GREAT LAKES THROUGH MID WEEK WHILE SLOWLY
DEEPENING TO AROUND 29.4 INCHES. WEAK HIGH PRESSURE RIDGING AROUND
29.9 INCHES WILL BE OVER THE GREAT LAKES ON FRIDAY INTO SATURDAY.

LMZ261-362-364-366-563-565-231530-
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-
427 AM CDT TUE MAY 23 2017

TWO RIVERS WI TO MANISTEE MI NORTH...

.TODAY...NORTHEAST WINDS 10 TO 15 KT INCREASING TO 10 TO 20 KT.
AREAS OF FOG. SLIGHT CHANCE OF RAIN SHOWERS. WAVES 1 TO 3 FT.
.TONIGHT...NORTHEAST WINDS 10 TO 20 KT INCREASING TO 15 TO 25 KT.
CHANCE OF RAIN SHOWERS AND SLIGHT CHANCE OF THUNDERSTORMS IN THE
EVENING...THEN CHANCE OF RAIN SHOWERS OVERNIGHT. WAVES 2 TO 4 FT
BUILDING TO 3 TO 5 FT OCCASIONALLY TO 7 FT.
.WEDNESDAY...NORTHEAST WINDS 10 TO 20 KT INCREASING TO 15 TO
25 KT. CHANCE OF RAIN SHOWERS. WAVES 3 TO 5 FT OCCASIONALLY TO
7 FT.
.WEDNESDAY NIGHT...NORTHEAST WINDS 15 TO 25 KT. CHANCE OF SHOWERS
OVERNIGHT. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT.
.THURSDAY...NORTHEAST WINDS 15 TO 25 KT DIMINISHING TO 10 TO
20 KT. WAVES 2 TO 4 FT.
.THURSDAY NIGHT...NORTHEAST WINDS 10 TO 20 KT BECOMING NORTH 5 TO
10 KT OVERNIGHT. WAVES 1 TO 3 FT SUBSIDING TO 1 TO 2 FT.
.FRIDAY...NORTHWEST WINDS 5 TO 10 KT BACKING TO SOUTHWEST 10 TO
15 KT. WAVES 1 FT OR LESS.
.SATURDAY...SOUTHWEST WINDS 5 TO 10 KT BECOMING SOUTH 10 TO
15 KT. WAVES 1 TO 2 FT.

$$

LMZ080-567-669-671-673-675-777-779-868-870-872-874-876-878-231530-
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-
427 AM CDT TUE MAY 23 2017

TWO RIVERS WI TO MANISTEE MI SOUTH...

.TODAY...SOUTH WINDS 10 TO 20 KT BECOMING SOUTHEAST 10 TO 15 KT.
SLIGHT CHANCE OF RAIN SHOWERS THIS MORNING...THEN CHANCE OF RAIN
SHOWERS AND SLIGHT CHANCE OF THUNDERSTORMS THIS AFTERNOON. WAVES 1
TO 3 FT.
.TONIGHT...NORTHEAST WINDS 10 TO 15 KT INCREASING TO 15 TO 25 KT.
CHANCE OF SHOWERS AND SLIGHT CHANCE OF THUNDERSTORMS IN THE
EVENING...THEN CHANCE OF SHOWERS OVERNIGHT. WAVES 1 TO 3 FT
BUILDING TO 3 TO 5 FT OCCASIONALLY TO 7 FT.
.WEDNESDAY...NORTHEAST WINDS 10 TO 20 KT BECOMING NORTH 15 TO
25 KT. CHANCE OF RAIN SHOWERS. WAVES 4 TO 6 FT OCCASIONALLY TO
8 FT.
.WEDNESDAY NIGHT...NORTH WINDS 15 TO 25 KT. CHANCE OF SHOWERS.
WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT.
.THURSDAY...NORTH WINDS 15 TO 25 KT DIMINISHING TO 10 TO 20 KT.
WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT SUBSIDING TO 3 TO 5 FT
OCCASIONALLY TO 7 FT.
.THURSDAY NIGHT...NORTH WINDS 10 TO 20 KT DIMINISHING TO 10 TO
15 KT. WAVES 2 TO 4 FT.
.FRIDAY...WEST WINDS 5 TO 10 KT BACKING TO SOUTH 10 TO 15 KT.
WAVES 1 TO 2 FT.
.SATURDAY...EAST WINDS 10 TO 15 KT BECOMING SOUTHEAST. WAVES 1 TO
2 FT.

$$

LMZ761-231530-
MAFOR 2309/
MICHIGAN NORTH 11210 12110 14120 11130. AREAS OF FOG. CHANCE OF
SHOWERS EARLY THIS MORNING AND TONIGHT. WAVES 1 TO 3 FT TODAY.
WAVES 2 TO 4 FT BUILDING TO 3 TO 5 FT OCCASIONALLY TO 7 FT
TONIGHT.

MICHIGAN SOUTH 11420 12410 12310 12110 11120. CHANCE OF SHOWERS.
WAVES 1 TO 3 FT TODAY. WAVES 1 TO 3 FT BUILDING TO 3 TO 5 FT
OCCASIONALLY TO 7 FT TONIGHT.

$$


RODRIGUEZ

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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