Great Lakes Forecast
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FZUS63 KLOT 210144
GLFLM

OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
844 PM CDT SAT MAY 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 29.7 INCHES OVER NORTHWESTERN IOWA
WILL MOVE TO NORTHWEST WISCONSIN BY LATE SUNDAY MORNING THEN
DEEPEN TO 29.6 INCHES AS IT CROSSES CENTRAL LAKE SUPERIOR INTO
MONDAY MORNING. A COLD FRONT WILL CROSS LAKE MICHIGAN TONIGHT
TURNING WINDS FROM EAST AND SOUTHEAST TO SOUTHWESTERLY. ANOTHER
LOW PRESSURE SYSTEM WILL DEVELOP ACROSS LAKE MICHIGAN LATER
TUESDAY TRANSITIONING WINDS TO VARIABLE AND THEN NORTH AND
NORTHEAST BY WEDNESDAY.

LMZ261-362-364-563-210915-
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 ROCK ISLAND PASSAGE TO STURGEON BAY WI-
844 PM CDT SAT MAY 20 2017

STURGEON BAY WI TO POINT BETSIE MI NORTH...

.REST OF TONIGHT...EAST WINDS TO 30 KT. PATCHY FOG THIS EVENING.
RAIN SHOWERS LIKELY THIS EVENING...THEN CHANCE OF RAIN SHOWERS
AND SLIGHT CHANCE OF THUNDERSTORMS OVERNIGHT. WAVES 4 TO 7 FT
OCCASIONALLY TO 9 FT.
.SUNDAY...SOUTHEAST WINDS 15 TO 25 KT VEERING TO SOUTHWEST.
CHANCE OF RAIN SHOWERS IN THE MORNING...THEN SLIGHT CHANCE OF
RAIN SHOWERS IN THE AFTERNOON. WAVES 4 TO 6 FT OCCASIONALLY TO
8 FT.
.SUNDAY NIGHT...SOUTHWEST WINDS 15 TO 25 KT. CHANCE OF RAIN
SHOWERS OVERNIGHT. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT SUBSIDING
TO 2 TO 4 FT.
.MONDAY...SOUTHWEST WINDS TO 30 KT DIMINISHING TO 15 TO 25 KT.
CHANCE OF RAIN SHOWERS IN THE MORNING. WAVES 1 TO 3 FT.
.MONDAY NIGHT...SOUTHWEST WINDS 10 TO 20 KT BECOMING WEST 5 TO
10 KT OVERNIGHT. WAVES 1 TO 3 FT.
.TUESDAY...NORTHWEST WINDS 5 TO 10 KT BECOMING NORTH 10 TO 15 KT.
WAVES 1 TO 2 FT.
.TUESDAY NIGHT...NORTH WINDS 10 TO 20 KT INCREASING TO 15 TO
25 KT. CHANCE OF RAIN SHOWERS. WAVES 1 TO 3 FT BUILDING TO 2 TO
4 FT.
.WEDNESDAY...NORTHEAST WINDS TO 30 KT BECOMING NORTH. CHANCE OF
RAIN SHOWERS. WAVES 2 TO 4 FT SUBSIDING TO 1 TO 3 FT.
.THURSDAY...NORTH WINDS 10 TO 20 KT. WAVES 1 FT OR LESS.

$$

LMZ080-366-565-567-669-671-673-675-777-779-868-870-872-874-876-
878-210915-
LAKE MICHIGAN FROM MICHIGAN CITY IN TO ST. JOSEPH MI 5 NM
OFFSHORE TO MID LAKE-
LAKE MICHIGAN FROM POINT BETSIE TO MANISTEE MI 5 NM OFFSHORE TO
MID LAKE-
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 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-
844 PM CDT SAT MAY 20 2017

STURGEON BAY WI TO POINT BETSIE MI SOUTH...

.REST OF TONIGHT...SOUTHEAST WINDS 15 TO 25 KT BECOMING SOUTH
10 TO 20 KT. PATCHY FOG THIS EVENING...THEN AREAS OF FOG
OVERNIGHT. CHANCE OF SHOWERS AND THUNDERSTORMS THIS EVENING...
THEN CHANCE OF SHOWERS AND SLIGHT CHANCE OF THUNDERSTORMS
OVERNIGHT. WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT SUBSIDING TO 3 TO
5 FT OCCASIONALLY TO 7 FT.
.SUNDAY...SOUTH WINDS 10 TO 20 KT BECOMING SOUTHWEST 15 TO 25 KT.
SLIGHT CHANCE OF RAIN SHOWERS IN THE MORNING. WAVES 3 TO 5 FT
OCCASIONALLY TO 7 FT.
.SUNDAY NIGHT...SOUTHWEST WINDS 10 TO 20 KT INCREASING TO 15 TO
25 KT. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT.
.MONDAY...SOUTHWEST WINDS TO 30 KT DIMINISHING TO 15 TO 25 KT.
WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT.
.MONDAY NIGHT...SOUTHWEST WINDS 10 TO 20 KT. CHANCE OF RAIN
SHOWERS. WAVES 1 TO 3 FT.
.TUESDAY...SOUTHWEST WINDS 10 TO 15 KT VEERING TO NORTH 10 TO
20 KT. CHANCE OF RAIN SHOWERS IN THE MORNING...THEN RAIN SHOWERS
LIKELY IN THE AFTERNOON. WAVES 1 TO 3 FT.
.TUESDAY NIGHT...NORTH WINDS 15 TO 25 KT INCREASING TO 30 KT.
CHANCE OF RAIN SHOWERS. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT.
.WEDNESDAY...NORTH WINDS TO 30 KT. WAVES 4 TO 6 FT OCCASIONALLY
TO 8 FT.
.THURSDAY...NORTH WINDS 15 TO 25 KT. WAVES 1 TO 3 FT.

$$
LMZ761-210915-
MAFOR 2103/
MICHIGAN NORTH 13240 12330 11430 12530. CHANCE OF SHOWERS
OVERNIGHT. CHANCE OF RAIN SHOWERS LATE SUNDAY. WAVES 4 TO 7 FT
OCCASIONALLY TO 9 FT OVERNIGHT. WAVES 4 TO 6 FT OCCASIONALLY TO 8
FT SUNDAY. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT SUNDAY EVENING.

MICHIGAN SOUTH 11330 11323 11423 13520 12520. CHANCE OF SHOWERS
AND THUNDERSTORMS OVERNIGHT. WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT
SUBSIDING TO 3 TO 5 FT OCCASIONALLY TO 7 FT OVERNIGHT. WAVES 3 TO
5 FT OCCASIONALLY TO 7 FT SUNDAY AND SUNDAY EVENING.

$$


JEE

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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