Great Lakes Forecast
Issued by NWS

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FZUS63 KLOT 220347 CCA
GLFLM

OPEN LAKE FORECAST FOR LAKE MICHIGAN...CORRECTED
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
852 PM CST TUE FEB 21 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 29.6 INCHES WILL MOVE OVER THE
NORTHERN PLAINS WEDNESDAY AND DEEPEN TO AROUND 29.5 INCHES AS IT
PASSES OVER THE WESTERN GREAT LAKES WEDNESDAY EVENING. STRONG LOW
PRESSURE AROUND 29.3 INCHES WILL MOVE NORTHEAST OVER THE LOWER
GREAT LAKES FRIDAY NIGHT INTO EARLY SATURDAY. RIDGING WITH A
CENTRAL PRESSURE OF 30.2 INCHES WILL MOVE ACROSS THE LAKE LATE
SATURDAY INTO EARLY SUNDAY.

LMZ261-362-364-366-563-565-567-868-220915-
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 CST TUE FEB 21 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

...DENSE FOG ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO NOON CST
WEDNESDAY...

.REST OF TONIGHT...SOUTH WINDS 10 TO 20 KT. PATCHY FOG THIS
EVENING...THEN AREAS OF DENSE FOG OVERNIGHT. WAVES 1 TO 3 FT.
.WEDNESDAY...SOUTHWEST WINDS 10 TO 20 KT BECOMING SOUTH. AREAS OF
DENSE FOG IN THE MORNING. SLIGHT CHANCE OF RAIN IN THE AFTERNOON.
WAVES 1 TO 3 FT.
.WEDNESDAY NIGHT...SOUTH WINDS 15 TO 25 KT VEERING TO NORTHWEST
10 TO 20 KT. CHANCE OF RAIN AND RAIN OVERNIGHT. WAVES 1 TO 2 FT.
.THURSDAY...NORTH WINDS 10 TO 20 KT INCREASING TO 15 TO 25 KT.
WAVES 2 TO 4 FT.
.THURSDAY NIGHT...NORTHEAST WINDS TO 30 KT. RAIN LIKELY, CHANCE
OF SNOW AND RAIN IN THE EVENING...THEN RAIN WITH RAIN LIKELY
OVERNIGHT. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT BUILDING TO 5 TO 8
FT OCCASIONALLY TO 10 FT.
.FRIDAY...EAST WINDS TO 30 KT BECOMING NORTHEAST. RAIN AND
RAIN IN THE MORNING,...THEN RAIN, RAIN WITH A CHANCE OF SLEET IN
THE AFTERNOON. WAVES 8 TO 11 FT OCCASIONALLY TO 14 FT SUBSIDING TO
6 TO 9 FT OCCASIONALLY TO 11 FT.
.FRIDAY NIGHT...NORTH WINDS 15 TO 25 KT INCREASING TO 30 KT. RAIN
AND SNOW LIKELY. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT.
.SATURDAY...NORTH GALES TO 35 KT BECOMING NORTHWEST. SNOW. WAVES
5 TO 8 FT OCCASIONALLY TO 10 FT.
.SUNDAY...WEST WINDS 15 TO 25 KT. CHANCE OF SNOW. WAVES 4 TO 7 FT
OCCASIONALLY TO 9 FT.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-220915-
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 CST TUE FEB 21 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

...DENSE FOG ADVISORY IN EFFECT UNTIL NOON CST WEDNESDAY...

.REST OF TONIGHT...SOUTH WINDS 10 TO 15 KT INCREASING TO 10 TO
20 KT. AREAS OF DESNE FOG. WAVES 1 TO 3 FT.
.WEDNESDAY...SOUTH WINDS 10 TO 20 KT. AREAS OF DENSE FOG IN THE
MORNING. WAVES 1 TO 3 FT.
.WEDNESDAY NIGHT...SOUTH WINDS 15 TO 25 KT BECOMING WEST 10 TO
20 KT. WAVES 1 TO 2 FT.
.THURSDAY...NORTHWEST WINDS 10 TO 20 KT BECOMING NORTH 15 TO
25 KT. CHANCE OF RAIN IN THE AFTERNOON. WAVES 2 TO 4 FT.
.THURSDAY NIGHT...NORTHEAST WINDS TO 30 KT BECOMING SOUTHEAST.
RAIN. WAVES 2 TO 4 FT BUILDING TO 4 TO 6 FT OCCASIONALLY TO 8 FT.
.FRIDAY...SOUTH WINDS TO 30 KT BECOMING SOUTHWEST 15 TO 25 KT.
RAIN WITH A CHANCE OF THUNDERSTORMS IN THE MORNING,... THEN RAIN
LIKELY WITH A CHANCE OF THUNDERSTORMS IN THE AFTERNOON. WAVES
4 TO 6 FT OCCASIONALLY TO 8 FT.
.FRIDAY NIGHT...WEST WINDS 15 TO 25 KT INCREASING TO 30 KT.
CHANCE OF RAIN AND SNOW LIKELY. WAVES 3 TO 5 FT OCCASIONALLY TO
7 FT.
.SATURDAY...WEST GALES TO 35 KT BECOMING NORTHWEST. SNOW AND RAIN
LIKELY. WAVES 5 TO 8 FT OCCASIONALLY TO 10 FT BUILDING TO 8 TO
11 FT OCCASIONALLY TO 14 FT.
.SUNDAY...WEST WINDS 15 TO 25 KT DIMINISHING TO 10 TO 20 KT.
CHANCE OF SNOW AND RAIN. WAVES 5 TO 8 FT OCCASIONALLY TO 10 FT
SUBSIDING TO 3 TO 5 FT OCCASIONALLY TO 7 FT.

$$
LMZ761-220915-
MAFOR 2110/
MICHIGAN NORTH 13424 12524 12420 11430. WAVES 1 TO 3 FT.

MICHIGAN SOUTH 12414 13424 12420 11430. WAVES 1 TO 3 FT.

$$

IZZI

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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