Great Lakes Forecast
Issued by NWS

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187
FZUS63 KLOT 240212
GLFLM

OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
812 PM 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...STRONG LOW PRESSURE AROUND 29.3 INCHES OVER THE
SOUTHERN PLAINS THIS EVENING...WILL MOVE TO THE SOUTHERN TIP OF
LAKE MICHIGAN FRIDAY EVENING...AND THEN INTO QUEBEC SATURDAY.
RIDGING WITH A CENTRAL PRESSURE OF 30.2 INCHES WILL MOVE ACROSS
THE LAKE LATE SATURDAY INTO EARLY SUNDAY.

LMZ261-362-364-366-563-565-241030-
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-
812 PM CST THU FEB 23 2017

TWO RIVERS WI TO MANISTEE MI NORTH...

...GALE WARNING IN EFFECT FROM 3 AM CST FRIDAY THROUGH FRIDAY
EVENING...

.REST OF TONIGHT...NORTHEAST WINDS 15 TO 25 KT INCREASING TO
GALES TO 35 KT. CHANCE OF SNOW SHOWERS THIS EVENING,...THEN SNOW
SHOWERS 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. RAIN AND SNOW. WAVES 8 TO 11
FT OCCASIONALLY TO 14 FT.
.FRIDAY NIGHT...NORTHEAST GALES TO 35 KT BECOMING NORTH TO 30
KT. SNOW AND RAIN IN THE EVENING,...THEN SNOW 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 IN THE MORNING...THEN
CHANCE OF SNOW IN THE AFTERNOON. WAVES 6 TO 9 FT OCCASIONALLY TO
11 FT.
.SATURDAY NIGHT...WEST WINDS TO 30 KT. CHANCE OF SNOW IN THE
EVENING. WAVES 5 TO 8 FT OCCASIONALLY TO 10 FT SUBSIDING TO 4 TO
6 FT OCCASIONALLY TO 8 FT.
.SUNDAY...SOUTHWEST WINDS TO 30 KT. CHANCE OF SNOW. WAVES 4 TO
6 FT OCCASIONALLY TO 8 FT.
.SUNDAY NIGHT...WEST WINDS 15 TO 25 KT DIMINISHING TO 10 TO 20
KT. CHANCE OF SNOW. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT
SUBSIDING TO 2 TO 4 FT.
.MONDAY...WEST WINDS 10 TO 15 KT BECOMING SOUTH 10 TO 20 KT.
WAVES 1 TO 3 FT.
.TUESDAY...SOUTHEAST WINDS 10 TO 20 KT. CHANCE OF RAIN AND SNOW.
WAVES 1 TO 3 FT.

$$

LMZ567-669-671-673-675-868-870-872-874-876-241030-
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-
812 PM 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 MIDNIGHT CST TONIGHT THROUGH
FRIDAY MORNING...

.REST OF TONIGHT...NORTHEAST WINDS TO 30 KT INCREASING TO GALES
TO 40 KT. RAIN SHOWERS WITH A CHANCE OF SNOW SHOWERS THIS
EVENING, THEN RAIN SHOWERS, SNOW SHOWERS, CHANCE OF THUNDERSTORMS
OVERNIGHT. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT BUILDING TO 7 TO
10 FT OCCASIONALLY TO 13 FT.

.FRIDAY...NORTHEAST GALES TO 40 KT DIMINISHING TO 30 KT. RAIN
SHOWERS, CHANCE OF THUNDERSTORMS IN THE MORNING...THEN RAIN
SHOWERS AND SLIGHT CHANCE OF THUNDERSTORMS IN THE AFTERNOON. WAVES
8 TO 11 FT OCCASIONALLY TO 14 FT SUBSIDING TO 6 TO 9 FT
OCCASIONALLY TO 11 FT.
.FRIDAY NIGHT...NORTHWEST WINDS TO 30 KT INCREASING TO GALES TO
35 KT. SNOW LIKELY. CHANCE OF RAIN IN THE EVENING. WAVES 5 TO 8
FT OCCASIONALLY TO 10 FT.
.SATURDAY...NORTHWEST GALES TO 40 KT BECOMING 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 DIMINISHING TO 15 TO 25 KT.
WAVES 6 TO 9 FT OCCASIONALLY TO 11 FT.
.SUNDAY...SOUTHWEST WINDS TO 30 KT. WAVES 4 TO 7 FT OCCASIONALLY
TO 9 FT.
.SUNDAY NIGHT...WEST WINDS 15 TO 25 KT. WAVES 4 TO 6 FT
OCCASIONALLY TO 8 FT.
.MONDAY...SOUTHWEST WINDS 10 TO 15 KT BECOMING SOUTH. WAVES 2 TO
4 FT.
.TUESDAY...SOUTHEAST WINDS 10 TO 20 KT BECOMING SOUTH. CHANCE OF
RAIN AND SNOW. WAVES 1 TO 3 FT.

$$

LMZ080-777-779-878-241030-
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-
812 PM CST THU FEB 23 2017

WINTHROP HARBOR IL TO SOUTH HAVEN MI SOUTH...

.REST OF TONIGHT...NORTHEAST WINDS 15 TO 25 KT BECOMING EAST TO
30 KT. RAIN SHOWERS AND SLIGHT CHANCE OF THUNDERSTORMS THIS
EVENING,...THEN RAIN SHOWERS WITH A CHANCE OF THUNDERSTORMS
OVERNIGHT. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT BUILDING TO 5 TO
8 FT OCCASIONALLY TO 10 FT.
.FRIDAY...SOUTHEAST WINDS 15 TO 25 KT VEERING TO SOUTHWEST 10 TO
20 KT. RAIN SHOWERS WITH A CHANCE OF THUNDERSTORMS IN THE
MORNING...THEN RAIN SHOWERS LIKELY WITH SLIGHT CHANCE OF
THUNDERSTORMS IN THE AFTERNOON. WAVES 5 TO 8 FT OCCASIONALLY TO
10 FT SUBSIDING TO 4 TO 6 FT OCCASIONALLY TO 8 FT.
.FRIDAY NIGHT...WEST WINDS 10 TO 20 KT INCREASING TO GALES TO 35
KT. CHANCE OF RAIN IN THE EVENING...THEN SNOW AND RAIN LIKELY
OVERNIGHT. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT BUILDING TO 5 TO
8 FT OCCASIONALLY TO 10 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 DIMINISHING TO 15 TO 25 KT.
WAVES 6 TO 9 FT OCCASIONALLY TO 11 FT SUBSIDING TO 4 TO 7 FT
OCCASIONALLY TO 9 FT.
.SUNDAY...SOUTHWEST WINDS TO 30 KT. WAVES 4 TO 6 FT OCCASIONALLY
TO 8 FT.
.SUNDAY NIGHT...SOUTHWEST WINDS 15 TO 25 KT. WAVES 3 TO 5 FT
OCCASIONALLY TO 7 FT.
.MONDAY...SOUTH WINDS 10 TO 15 KT BECOMING SOUTHEAST. WAVES 1 TO
3 FT.
.TUESDAY...SOUTH WINDS 10 TO 15 KT INCREASING TO 10 TO 20 KT.
CHANCE OF RAIN AND SNOW. WAVES 1 TO 3 FT.

$$
LMZ761-241030-
MAFOR 2404/
MICHIGAN NORTH...GALE WARNING IN EFFECT...11140 14157 11157 11156
11147. CHANCE OF SNOW SHOWERS LATE THIS EVENING. WAVES 4 TO 7 FT
OCCASIONALLY TO 9 FT BUILDING TO 7 TO 10 FT OCCASIONALLY TO 13 FT
OVERNIGHT. WAVES 8 TO 11 FT OCCASIONALLY TO 14 FT FRIDAY. WAVES 7
TO 10 FT OCCASIONALLY TO 13 FT FRIDAY EVENING.

MICHIGAN SOUTH...GALE WARNING IN EFFECT...11146 11156 13256 11246
11636 11630. CHANCE OF THUNDERSTORMS AFTER MIDNIGHT. CHANCE OF
THUNDERSTORMS FRIDAY MORNING. CHANCE OF RAIN FRIDAY EVENING.
WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT BUILDING TO 7 TO 10 FT
OCCASIONALLY TO 13 FT OVERNIGHT. WAVES 7 TO 10 FT OCCASIONALLY TO
13 FT FRIDAY. WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT FRIDAY EVENING.


$$

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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