Great Lakes Forecast
Issued by NWS

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FZUS63 KLOT 121453 CCA
GLFLM

OPEN LAKE FORECAST FOR LAKE MICHIGAN...CORRECTED
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
853 AM CST FRI DEC 12 2014

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 30.4 INCHES CENTERED ACROSS THE MID
MISSISSIPPI VALLEY...WITH A RIDGE AVERAGING 30.3 INCHES THROUGH
WESTERN WISCONSIN...WILL MOVE LITTLE TODAY AND TONIGHT. THE HIGH
WILL SLOWLY MOVE SOUTHEAST AND GRADUALLY WEAKEN DURING THE
WEEKEND. LOW PRESSURE AROUND 29.8 INCHES WILL DEVELOP ACROSS THE
NORTHERN PLAINS BY EARLY SUNDAY AND DRIFT TO NEAR LAKE SUPERIOR BY
SUNDAY NIGHT. MEANWHILE...ANOTHER LOW PRESSURE AROUND 29.7 INCHES
IN THE CENTRAL PLAINS SUNDAY NIGHT WILL MOVE TO THE WESTERN GREAT
LAKES REGION MONDAY NIGHT...WITH THE TWO SYSTEMS PHASING TOGETHER.
THIS WILL STEER A COLD FRONT ACROSS THE LAKE SOMETIME MONDAY NIGHT
OR EARLY TUESDAY. THE MERGED LOW WILL CONTINUE EASTWARD WHILE A
HIGH PRESSURE RIDGE NEAR 30.3 INCHES MOVES OVER THE LAKE DURING
THE LATTER PART OF NEXT WEEK.

LMZ261-362-364-366-563-565-567-868-122300-
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-
853 AM CST FRI DEC 12 2014

SHEBOYGAN WI TO PENTWATER MI NORTH

.REST OF TODAY...WEST WINDS 10 TO 20 KT. PATCHY FOG. WAVES 2 TO 4
FT.
.TONIGHT...SOUTHWEST WINDS 10 TO 15 KT EARLY THIS EVENING
INCREASING TO 10 TO 20 KT FROM LATE EVENING ON. PATCHY FOG. WAVES
2 TO 4 FT.
.SATURDAY...SOUTHWEST WINDS 10 TO 20 KT. PATCHY FOG. WAVES 3 TO
5 FT OCCASIONALLY TO 7 FT.
.SATURDAY NIGHT...WEST WINDS 10 TO 20 KT. PATCHY FOG AND DRIZZLE.
WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT.
.SUNDAY...SOUTHWEST WINDS 10 TO 15 KT. SLIGHT CHANCE OF RAIN.
WAVES 2 TO 4 FT.
.SUNDAY NIGHT...SOUTHWEST WINDS 10 TO 20 KT. CHANCE OF RAIN.
WAVES 2 TO 4 FT.
.MONDAY...SOUTH WINDS 10 TO 20 KT BECOMING EAST LATE MONDAY NIGHT.
CHANCE OF RAIN. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT.
.TUESDAY...NORTH WINDS 15 TO 25 KT BECOMING NORTHWEST AND
INCREASING TO 30 KT BY EVENING. CHANCE OF RAIN OR SNOW. WAVES
BUILDING TO 3 TO 5 FT OCCASIONALLY TO 7 FT...FURTHER BUILDING TO 4
TO 7 FT OCCASIONALLY TO 9 FT BY EVENING.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-122300-
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-
853 AM CST FRI DEC 12 2014

SHEBOYGAN WI TO PENTWATER MI SOUTH

.REST OF TODAY...WEST WINDS 10 TO 20 KT. PATCHY FOG THROUGH EARLY
AFTERNOON. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT.
.TONIGHT...WEST WINDS 10 TO 20 KT. PATCHY FOG OVERNIGHT. WAVES
SUBSIDING TO 2 TO 4 FT.
.SATURDAY...SOUTHWEST WINDS 10 TO 20 KT. PATCHY FOG. WAVES 2 TO
4 FT.
.SATURDAY NIGHT...SOUTHWEST WINDS 10 TO 15 KT. PATCHY FOG AND
DRIZZLE. WAVES 2 TO 4 FT.
.SUNDAY...SOUTHWEST WINDS 10 TO 20 KT. SLIGHT CHANCE OF RAIN.
WAVES 2 TO 4 FT.
.SUNDAY NIGHT...SOUTH WINDS 15 TO 20 KT. CHANCE OF RAIN. WAVES
2 TO 4 FT.
.MONDAY...SOUTH WINDS 15 TO 25 KT. CHANCE OF RAIN. WAVES 3 TO
5 FT OCCASIONALLY TO 7 FT.
.TUESDAY...WEST WINDS TO 30 KT. CHANCE OF RAIN OR SNOW. WAVES
BUILDING TO 4 TO 7 FT OCCASIONALLY TO 9 FT.

$$
LMZ761-122300-
MAFOR 1216/
MICHIGAN NORTH 12620 11620 19510 11510 14520. PATCHY FOG THROUGH
SATURDAY MORNING. WAVES 2 TO 4 FT TODAY AND TONIGHT. WAVES 3 TO 5
FT OCCASIONALLY TO 7 FT SATURDAY MORNING.

MICHIGAN SOUTH 16620. PATCHY FOG THROUGH EARLY AFTERNOON. PATCHY
FOG AFTER MIDNIGHT TONIGHT AND SATURDAY MORNING. WAVES 3 TO 5 FT
OCCASIONALLY TO 7 FT TODAY AND 2 TO 4 FT TONIGHT AND SATURDAY
MORNING.

$$

RC









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