Great Lakes Forecast
Issued by NWS

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000
FZUS63 KLOT 230858
GLFLM

OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
258 AM CST THU FEB 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....SYNOPSIS...LOW PRESSURE OF 29.5 INCHES OVER NORTHERN
LAKE HURON...WILL PUSH A COLD FRONT SOUTH DOWN THE LAKE EARLY
THIS MORNING. 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.

LMZ261-362-364-366-563-565-231615-
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-
258 AM CST THU FEB 23 2017

TWO RIVERS WI TO MANISTEE MI NORTH...

...GALE WARNING IN EFFECT FROM LATE TONIGHT THROUGH FRIDAY
EVENING...

.TODAY...NORTH WINDS 20 TO 25 KT. WAVES 3 TO 6 FT OCCASIONALLY TO
8 FT.
.TONIGHT...NORTHEAST WINDS TO 30 KT INCREASING TO GALES TO 40 KT.
CHANCE OF SNOW SHOWERS IN THE EVENING...THEN CHANCE OF SNOW
SHOWERS WITH POSSIBLE SLEET AND FREEZING RAIN OVERNIGHT. WAVES 3
TO 5 FT OCCASIONALLY TO 7 FT BUILDING TO 6 TO 9 FT OCCASIONALLY TO
11 FT.
.FRIDAY...NORTHEAST GALES TO 40 KT. SNOW SHOWERS AND SLEET IN THE
MORNING...THEN RAIN SHOWERS AND SLEET IN THE AFTERNOON. WAVES 8
TO 11 FT OCCASIONALLY TO 14 FT.
.FRIDAY NIGHT...NORTHEAST GALES TO 35 KT BECOMING NORTH TO 30 KT.
RAIN, SNOW AND SLEET IN THE EVENING...THEN SNOW LIKELY OVERNIGHT.
WAVES 7 TO 10 FT OCCASIONALLY TO 13 FT SUBSIDING TO 4 TO 7 FT
OCCASIONALLY TO 9 FT.
.SATURDAY...NORTHWEST GALES TO 35 KT. SNOW LIKELY IN THE
MORNING...THEN CHANCE OF SNOW IN THE AFTERNOON. WAVES 5 TO 8 FT
OCCASIONALLY TO 10 FT.
.SATURDAY NIGHT...NORTHWEST WINDS TO 30 KT BECOMING WEST. CHANCE
OF SNOW. WAVES 5 TO 8 FT OCCASIONALLY TO 10 FT SUBSIDING TO 4 TO
7 FT OCCASIONALLY TO 9 FT.
.SUNDAY...WEST WINDS TO 30 KT BECOMING SOUTHWEST. CHANCE OF SNOW.
WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT BUILDING TO 4 TO 7 FT
OCCASIONALLY TO 9 FT.
.MONDAY...NORTHWEST WINDS 10 TO 15 KT VEERING TO EAST. WAVES 2 TO
4 FT SUBSIDING TO 1 TO 3 FT.

$$

LMZ567-669-671-673-675-868-870-872-874-876-231615-
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 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-
258 AM CST THU FEB 23 2017

TWO RIVERS WI TO MANISTEE MI SOUTH TO WINTHROP HARBOR IL TO SOUTH
HAVEN MI...

...GALE WARNING IN EFFECT FROM LATE TONIGHT THROUGH FRIDAY
MORNING...

.TODAY...NORTH WINDS 15 TO 25 KT INCREASING TO 30 KT. WAVES 4 TO
6 FT OCCASIONALLY TO 8 FT.
.TONIGHT...NORTHEAST WINDS TO 30 KT BECOMING EAST GALES TO 40 KT.
RAIN SHOWERS LIKELY WITH A CHANCE OF SNOW SHOWERS IN THE
EVENING...THEN RAIN SHOWERS, SLIGHT CHANCE OF THUNDERSTORMS AND
FREEZING RAIN OVERNIGHT. WAVES 7 TO 10 FT OCCASIONALLY TO 13 FT.
.FRIDAY...EAST GALES TO 40 KT DIMINISHING TO 30 KT. RAIN SHOWERS
WITH A CHANCE OF THUNDERSTORMS IN THE MORNING...THEN RAIN SHOWERS
IN THE AFTERNOON. WAVES 7 TO 10 FT OCCASIONALLY TO 13 FT
SUBSIDING TO 5 TO 8 FT OCCASIONALLY TO 10 FT.
.FRIDAY NIGHT...SOUTHWEST WINDS 15 TO 25 KT BECOMING WEST GALES
TO 35 KT OVERNIGHT. RAIN LIKELY IN THE EVENING,...THEN SNOW AND
RAIN LIKELY OVERNIGHT. WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT.
.SATURDAY...NORTHWEST GALES TO 40 KT DIMINISHING TO GALES TO
35 KT. SNOW LIKELY IN THE MORNING,...THEN CHANCE OF SNOW IN THE
AFTERNOON. WAVES 7 TO 10 FT OCCASIONALLY TO 13 FT.
.SATURDAY NIGHT...WEST GALES TO 35 KT DIMINISHING TO 30 KT. WAVES
6 TO 9 FT OCCASIONALLY TO 11 FT.
.SUNDAY...SOUTHWEST WINDS TO 30 KT. WAVES 3 TO 5 FT OCCASIONALLY
TO 7 FT BUILDING TO 4 TO 7 FT OCCASIONALLY TO 9 FT.
.MONDAY...NORTHWEST WINDS 10 TO 15 KT VEERING TO EAST. WAVES 2 TO
4 FT SUBSIDING TO 1 TO 2 FT.

$$

LMZ080-777-779-878-231615-
LAKE MICHIGAN FROM MICHIGAN CITY IN TO ST. JOSEPH MI 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 ST. JOSEPH TO SOUTH HAVEN MI 5 NM OFFSHORE TO
MID LAKE-
258 AM CST THU FEB 23 2017

WINTHROP HARBOR IL TO SOUTH HAVEN MI SOUTH...

.TODAY...NORTHWEST WINDS 10 TO 20 KT BECOMING NORTH AROUND 25 KT.
PATCHY FOG THIS MORNING. SLIGHT CHANCE OF RAIN SHOWERS THIS
AFTERNOON. WAVES 1 TO 3 FT BUILDING TO 4 TO 6 FT OCCASIONALLY TO
8 FT.
.TONIGHT...NORTHEAST WINDS 15 TO 25 KT BECOMING EAST TO 30 KT.
RAIN SHOWERS IN THE EVENING...THEN RAIN SHOWERS WITH A CHANCE OF
THUNDERSTORMS OVERNIGHT. WAVES 6 TO 9 FT OCCASIONALLY TO 11 FT.
.FRIDAY...SOUTHEAST WINDS TO 30 KT DIMINISHING TO 10 TO 20 KT
LATE IN THE MORNING...THEN BECOMING SOUTH EARLY IN THE AFTERNOON
BECOMING SOUTHWEST LATE. RAIN SHOWERS WITH A CHANCE OF
THUNDERSTORMS IN THE MORNING...THEN RAIN SHOWERS LIKELY WITH A
CHANCE OF THUNDERSTORMS IN THE AFTERNOON. WAVES 6 TO 9 FT
OCCASIONALLY TO 11 FT SUBSIDING TO 4 TO 6 FT OCCASIONALLY TO 8 FT.

.FRIDAY NIGHT...SOUTHWEST WINDS 15 TO 25 KT INCREASING TO GALES
TO 35 KT OVERNIGHT. CHANCE OF RAIN IN THE EVENING... THEN CHANCE
OF RAIN AND SNOW OVERNIGHT. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT
BUILDING TO 4 TO 7 FT OCCASIONALLY TO 9 FT.
.SATURDAY...WEST GALES TO 35 KT. SNOW LIKELY IN THE MORNING...
THEN CHANCE OF SNOW IN THE AFTERNOON. WAVES 7 TO 10 FT
OCCASIONALLY TO 13 FT.
.SATURDAY NIGHT...WEST WINDS TO 30 KT. WAVES 6 TO 9 FT
OCCASIONALLY TO 11 FT.
.SUNDAY...SOUTHWEST WINDS 15 TO 25 KT INCREASING TO 30 KT. WAVES
4 TO 6 FT OCCASIONALLY TO 8 FT.
.MONDAY...NORTH WINDS 5 TO 10 KT VEERING TO EAST. WAVES 1 TO 3 FT
SUBSIDING TO 1 TO 2 FT.

$$

LMZ761-231615-
MAFOR 2310/
MICHIGAN NORTH...GALE WARNING IN EFFECT...12830 12840 12140 11140
19150 11157. CHANCE OF SNOW SHOWERS THIS EVENING. WAVES 3 TO 6 FT
OCCASIONALLY TO 8 FT TODAY. WAVES BUILDING TO 6 TO 9 FT
OCCASIONALLY TO 11 FT TONIGHT.

MICHIGAN SOUTH...GALE WARNING IN EFFECT...11720 13830 19840 11140
11146 12156. WAVES 2 TO 4 FT BUILDING TO 4 TO 6 FT OCCASIONALLY
TO 8 FT TODAY. WAVES BUILDING TO 7 TO 10 FT OCCASIONALLY TO 13 FT
TONIGHT.

$$


KJB

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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