Great Lakes Forecast
Issued by NWS

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446
FZUS63 KLOT 260134
GLFLM

OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
834 PM CDT SUN SEP 25 2016

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 HEIGHT OF THE HIGHEST 1/3 OF THE WAVES...ALONG
WITH THE AVERAGE HEIGHT OF THE HIGHEST 10 PERCENT OF THE WAVES
WHICH WILL OCCASIONALLY BE ENCOUNTERED.

.SYNOPSIS...HIGH PRESSURE OF 30.3 INCHES OVER THE EASTERN GREAT LAKES
WILL SLOWLY MOVE ACROSS NEW ENGLAND TONIGHT AND THEN OFFSHORE ON
MONDAY. LOW PRESSURE OF 29.5 INCHES OVER WEST CENTRAL ONTARIO WILL
MOVE TO LAKE SUPERIOR MONDAY. AHEAD OF THE LOW AN ASSOCIATED
STRONG COLD FRONT WILL MOVE ACROSS THE LAKE TONIGHT. THE LOW WILL
THEN SLOWLY SINK SOUTH-SOUTHEAST THROUGH THE GREAT LAKES REGION
TUESDAY NIGHT INTO WEDNESDAY WHILE A HIGH PRESSURE RIDGE OF 30.1
MOVES INTO THE OHIO VALLEY. A RIDGE OF HIGH PRESSURE AVERAGING
30.3 INCHES WILL BUILD ACROSS PORTIONS OF THE MID AND UPPER
MISSISSIPPI VALLEY MIDWEEK AND THEN OVERSPREAD THE GREAT LAKES AT
30.4 INCHES LATE IN THE WEEK AS THE LOW MOVES TO THE ATLANTIC
SEABOARD.

LMZ261-362-364-366-563-565-567-868-260930-
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-
834 PM CDT SUN SEP 25 2016

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TONIGHT...SOUTHEAST WINDS 15 TO 25 KT BECOMING WEST TO 30
KT AFTER MIDNIGHT. SHOWERS AND SLIGHT CHANCE OF THUNDERSTORMS
THIS EVENING...THEN CHANCE OF SHOWERS OVERNIGHT. WAVES 4 TO 6 FT
OCCASIONALLY TO 8 FT.
.MONDAY...WEST WINDS TO 30 KT. OCCASIONAL GALE FORCE GUSTS TO 35
KT IN THE LATE MORNING AND AFTERNOON. SLIGHT CHANCE OF SHOWERS IN
THE MORNING...THEN CHANCE OF SHOWERS IN THE AFTERNOON. WAVES 6 TO
9 FT OCCASIONALLY TO 11 FT.
.MONDAY NIGHT...WEST WINDS TO 30 KT. CHANCE OF SHOWERS. WAVES
5 TO 8 FT OCCASIONALLY TO 10 FT.
.TUESDAY...WEST WINDS TO 30 KT. CHANCE OF SHOWERS IN THE
MORNING...THEN SHOWERS LIKELY IN THE AFTERNOON. WAVES 4 TO 7 FT
OCCASIONALLY TO 9 FT.
.TUESDAY NIGHT...NORTHWEST WINDS 15 TO 25 KT BECOMING NORTH.
SHOWERS LIKELY IN THE EVENING...THEN CHANCE OF SHOWERS OVERNIGHT.
WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT SUBSIDING TO 3 TO 5 FT
OCCASIONALLY TO 7 FT.
.WEDNESDAY...NORTH WINDS 15 TO 25 KT. CHANCE OF SHOWERS IN THE
MORNING. WAVES 2 TO 4 FT.
.WEDNESDAY NIGHT...NORTH WINDS 10 TO 20 KT DIMINISHING TO 10 TO
15 KT. WAVES 2 TO 4 FT.
.THURSDAY...NORTH WINDS 10 TO 15 KT INCREASING TO 10 TO 20 KT.
WAVES 1 TO 2 FT.
.FRIDAY...NORTHEAST WINDS 10 TO 15 KT. WAVES 1 FT OR LESS.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-260930-
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-
834 PM CDT SUN SEP 25 2016

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TONIGHT...SOUTH WINDS 10 TO 20 KT BECOMING WEST 15 TO 25
KT LATE THIS EVENING...THEN INCREASING TO 30 KT AFTER MIDNIGHT.
CHANCE OF SHOWERS AND THUNDERSTORMS THIS EVENING...THEN CHANCE OF
SHOWERS OVERNIGHT. WAVES 2 TO 4 FT BUILDING TO 4 TO 6 FT
OCCASIONALLY TO 8 FT.
.MONDAY...WEST WINDS TO 30 KT. OCCASIONAL GALE FORCE GUSTS TO 35
KT IN THE AFTERNOON. SLIGHT CHANCE OF SHOWERS IN THE AFTERNOON.
WAVES 6 TO 9 FT OCCASIONALLY TO 11 FT.
.MONDAY NIGHT...WEST WINDS TO 30 KT. WAVES 6 TO 9 FT OCCASIONALLY
TO 11 FT.
.TUESDAY...WEST WINDS TO 30 KT. CHANCE OF SHOWERS IN THE
AFTERNOON. WAVES 5 TO 8 FT OCCASIONALLY TO 10 FT.
.TUESDAY NIGHT...NORTHWEST WINDS TO 30 KT DIMINISHING TO 15 TO
25 KT. CHANCE OF SHOWERS IN THE EVENING...THEN SHOWERS LIKELY
OVERNIGHT. WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT.
.WEDNESDAY...NORTH WINDS 15 TO 25 KT. CHANCE OF SHOWERS IN THE
MORNING. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT.
.WEDNESDAY NIGHT...NORTH WINDS 15 TO 25 KT DIMINISHING TO 10 TO
20 KT. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT.
.THURSDAY...NORTH WINDS 10 TO 20 KT. WAVES 1 TO 3 FT.
.FRIDAY...NORTHEAST WINDS 10 TO 15 KT INCREASING TO 10 TO 20 KT.
WAVES 1 TO 2 FT.

$$
LMZ761-260930-
MAFOR 2603/
MICHIGAN NORTH 11336 11530 12640 13640 19650 11640. CHANCE OF
SHOWERS. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT OVERNIGHT. WAVES 6
TO 9 FT OCCASIONALLY TO 11 FT MONDAY AND MONDAY EVENING.

MICHIGAN SOUTH 11420 11630 13640 12640 19650 11640. CHANCE OF
SHOWERS AND THUNDERSTORMS THIS EVENING THEN A CHANCE OF SHOWERS
OVERNIGHT. WAVES 2 TO 4 FT BUILDING TO 4 TO 6 FT OCCASIONALLY TO
8 FT OVERNIGHT. WAVES 6 TO 9 FT OCCASIONALLY TO 11 FT MONDAY AND
MONDAY EVENING.

$$


KJB

EXPERIMENTAL MODERNIZED OPEN LAKE FORECAST IS AVAILABLE ONLINE AT
WEATHER.GOV/LOT/GLFTABLE (ALL LOWER CASE)

GRAPHICAL MARINE FORECASTS ARE AVAILABLE ONLINE AT
WEATHER.GOV/GREATLAKES (ALL LOWER CASE)



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