Great Lakes Forecast
Issued by NWS

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000
FZUS63 KLOT 210849
GLFLM

OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
249 AM 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...HIGH PRESSURE OF 30.4 INCHES OVER NEW ENGLAND WILL
MOVE EAST WHILE LOW PRESSURE OF 29.3 INCHES OVER ONTARIO WILL MOVE
TO HUDSON BAY TONIGHT AND DEEPEN TO 29.2 INCHES AS IT DOES. AN
ASSOCIATED COLD FRONT WILL PASS OVER THE LAKE THIS MORNING. A WEAK
HIGH PRESSURE RIDGE AVERAGING 29.9 INCHES WILL THEN BUILD OVER
THE SOUTHERN MISSISSIPPI VALLEY THIS AFTERNOON. LOW OF 29.6
INCHES THEN MOVES OVER THE NORTHERN PLAINS WEDNESDAY AND DEEPENS
TO AROUND 29.5 INCHES AS IT PASSES OVER THE WESTERN GREAT LAKES
WEDNESDAY EVENING. A STRONG LOW PRESSURE OF AROUND 29.3 INCHES IS
THEN FORECAST TO MOVE NORTHEAST OVER THE LOWER GREAT LAKES FRIDAY
NIGHT INTO EARLY SATURDAY.

LMZ261-362-364-366-563-565-567-868-211630-
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-
249 AM CST TUE FEB 21 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TODAY...SOUTHWEST WINDS TO 30 KT DIMINISHING TO 10 TO 15 KT...AND
THEN BECOMING SOUTH 10 TO 20 KT LATE IN THE AFTERNOON. SLIGHT
CHANCE OF RAIN SHOWERS THIS MORNING. WAVES 4 TO 7 FT OCCASIONALLY
TO 9 FT SUBSIDING TO 2 TO 4 FT.
.TONIGHT...SOUTH WINDS 10 TO 20 KT INCREASING TO 15 TO 25
KT...AND THEN BECOMING SOUTHWEST. WAVES 1 TO 3 FT BUILDING TO 2 TO
4 FT.
.WEDNESDAY...SOUTHWEST WINDS 10 TO 20 KT BECOMING SOUTH 15 TO
25 KT. WAVES 1 TO 3 FT.
.WEDNESDAY NIGHT...SOUTHWEST WINDS 15 TO 25 KT BECOMING NORTHWEST
10 TO 20 KT. WAVES 1 TO 3 FT.
.THURSDAY...NORTH WINDS 10 TO 20 KT. WAVES 2 TO 4 FT.
.THURSDAY NIGHT...NORTHEAST WINDS TO 30 KT. A FEW GALE FORCE GUSTS
TO 35 KT ARE POSSIBLE. CHANCE OF RAIN AND SNOW. WAVES 3 TO 5 FT
OCCASIONALLY TO 7 FT BUILDING TO 4 TO 7 FT OCCASIONALLY TO 9 FT.
.FRIDAY...NORTHEAST WINDS TO 30 KT. RAIN, SNOW AND FREEZING RAIN.
WAVES 6 TO 9 FT OCCASIONALLY TO 11 FT.
.SATURDAY...NORTH GALES TO 40 KT BECOMING NORTHWEST GALES TO
35 KT. SNOW LIKELY. WAVES 7 TO 10 FT OCCASIONALLY TO 13 FT.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-211630-
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-
249 AM CST TUE FEB 21 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TODAY...SOUTHWEST WINDS 15 TO 25 KT BECOMING WEST 10 TO 15
KT...AND THEN BECOMING VARIABLE 5 TO 10 KT IN THE AFTERNOON.
CHANCE OF RAIN SHOWERS THIS MORNING. WAVES 4 TO 6 FT OCCASIONALLY
TO 8 FT SUBSIDING TO 1 TO 2 FT.
.TONIGHT...SOUTH WINDS 10 TO 20 KT BECOMING SOUTHWEST. WAVES 1 TO
3 FT.
.WEDNESDAY...SOUTHWEST WINDS 10 TO 20 KT BECOMING SOUTH 15 TO
25 KT. WAVES 1 TO 2 FT BUILDING TO 1 TO 3 FT.
.WEDNESDAY NIGHT...SOUTHWEST WINDS 15 TO 25 KT BECOMING WEST
10 TO 20 KT. WAVES 1 TO 3 FT.
.THURSDAY...NORTH WINDS 10 TO 20 KT. CHANCE OF RAIN SHOWERS IN
THE AFTERNOON. WAVES 1 TO 3 FT BUILDING TO 2 TO 4 FT.
.THURSDAY NIGHT...NORTHEAST WINDS TO 30 KT BECOMING EAST. RAIN
AND RAIN SHOWERS. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT.
.FRIDAY...SOUTHEAST WINDS 15 TO 25 KT BECOMING NORTHWEST. RAIN
SHOWERS, CHANCE OF THUNDERSTORMS AND RAIN. WAVES 4 TO 6 FT
OCCASIONALLY TO 8 FT.
.SATURDAY...NORTHWEST GALES TO 40 KT DIMINISHING TO GALES TO
35 KT. SNOW LIKELY. WAVES 8 TO 12 FT OCCASIONALLY TO 15 FT.

$$

LMZ761-211630-
MAFOR 2110/
MICHIGAN NORTH 11546 11530 11620 11510 12420 11430 11530. WAVES 4
TO 7 FT OCCASIONALLY TO 9 FT SUBSIDING TO 2 TO 4 FT TODAY. WAVES
1 TO 3 FT BUILDING TO 2 TO 4 FT TONIGHT.

MICHIGAN SOUTH 11536 11520 11610 12900 12420 11520. WAVES 4 TO 6
FT OCCASIONALLY TO 8 FT SUBSIDING TO 1 TO 2 FT TODAY. WAVES 1
TO 3 FT TONIGHT.

$$


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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