Great Lakes Forecast
Issued by NWS

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FZUS63 KLOT 122055
GLFLM

OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
255 PM 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 30.3 INCHES CENTERED ACROSS THE
WESTERN OHIO VALLEY...WITH A RIDGE EXTENDING THROUGH WESTERN
WISCONSIN...WILL MOVE LITTLE 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.

LMZ261-362-364-366-563-565-567-868-130430-
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-
255 PM CST FRI DEC 12 2014

SHEBOYGAN WI TO PENTWATER MI NORTH

.TONIGHT...WEST WINDS 10 TO 15 KT BECOMING SOUTHWEST 10 TO 20 KT.
PATCHY FOG THIS EVENING...THEN AREAS OF FOG OVERNIGHT. WAVES 2 TO
4 FT.
.SATURDAY...SOUTHWEST WINDS 15 TO 25 KT EASING TO 10 TO 20 KT LATE.
AREAS OF FOG IN THE MORNING...THEN PATCHY FOG IN THE AFTERNOON.
PATCHY DRIZZLE. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT.
.SATURDAY NIGHT...WEST WINDS 10 TO 20 KT DIMINISHING TO 10 TO 15
KT. PATCHY FOG IN THE EVENING...THEN AREAS OF FOG OVERNIGHT.
PATCHY DRIZZLE IN THE EVENING...THEN AREAS OF DRIZZLE OVERNIGHT.
WAVES 2 TO 4 FT.
.SUNDAY...SOUTHWEST WINDS 10 TO 20 KT. PATCHY FOG IN THE MORNING.
SLIGHT CHANCE OF RAIN. WAVES 1 TO 3 FT.
.SUNDAY NIGHT...SOUTH WINDS 10 TO 20 KT. CHANCE OF RAIN. WAVES
BUILDING TO 2 TO 4 FT OVERNIGHT.
.MONDAY...SOUTH WINDS 10 TO 20 KT. CHANCE OF RAIN. WAVES 2 TO
4 FT.
.MONDAY NIGHT...SOUTH WINDS 10 TO 20 KT. RAIN LIKELY. WAVES 2 TO
4 FT.
.TUESDAY...SOUTHWEST WINDS 10 TO 20 KT VEERING TO NORTHWEST 15 TO
25 KT. CHANCE OF RAIN OR SNOW. WAVES BUILDING TO 3 TO 6 FT
OCCASIONALLY TO 8 FT.
.WEDNESDAY...NORTHWEST WINDS 15 TO 25 KT EASING TO 10 TO 15 KT IN
THE AFTERNOON. CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO 1 TO 3
FT IN THE AFTERNOON.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-130430-
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-
255 PM CST FRI DEC 12 2014

SHEBOYGAN WI TO PENTWATER MI SOUTH

.TONIGHT...WEST WINDS 10 TO 15 KT INCREASING TO 10 TO 20 KT.
PATCHY FOG THIS EVENING... THEN AREAS OF FOG OVERNIGHT. PATCHY
DRIZZLE OVERNIGHT. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT SUBSIDING
TO 2 TO 4 FT.
.SATURDAY...WEST WINDS 10 TO 20 KT BECOMING SOUTHWEST AND DIMINISHING
TO 10 TO 15 KT LATE. AREAS OF FOG IN THE MORNING...THEN PATCHY FOG
IN THE AFTERNOON. PATCHY DRIZZLE. WAVES 2 TO 4 FT.
.SATURDAY NIGHT...SOUTHWEST WINDS 10 TO 20 KT. PATCHY FOG IN THE
EVENING...THEN AREAS OF FOG OVERNIGHT. PATCHY DRIZZLE IN THE
EVENING...THEN AREAS OF DRIZZLE OVERNIGHT. WAVES 1 TO 3 FT.
.SUNDAY...SOUTHWEST WINDS 10 TO 20 KT. PATCHY FOG IN THE MORNING.
SLIGHT CHANCE OF RAIN WITH PATCHY DRIZZLE IN THE MORNING...THEN
SLIGHT CHANCE OF RAIN IN THE AFTERNOON. WAVES 1 TO 3 FT.
.SUNDAY NIGHT...SOUTH WINDS 15 TO 25 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.
.MONDAY NIGHT...SOUTH WINDS 15 TO 25 KT. RAIN LIKELY. WAVES 3 TO
5 FT OCCASIONALLY TO 7 FT.
.TUESDAY...WEST WINDS 15 TO 25 KT BECOMING NORTHWEST IN THE LATE
EVENING AND OVERNIGHT. CHANCE OF RAIN OR SNOW. WAVES 4 TO 7 FT
OCCASIONALLY TO 9 FT.
.WEDNESDAY...NORTHWEST WINDS 15 TO 25 KT EASING TO 10 TO 15 KT
LATE. SLIGHT CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO 2 TO 4 FT
IN THE AFTERNOON.

$$

LMZ761-130430-
MAFOR 1222/
MICHIGAN NORTH 12610 13523 11533 12530. PATCHY FOG THIS EVENING
AND SATURDAY AFTERNOON. PATCHY DRIZZLE SATURDAY. WAVES 2 TO 4 FT
TONIGHT. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT SATURDAY.

MICHIGAN SOUTH 12610 14623 12520. PATCHY FOG THIS EVENING AND
SATURDAY AFTERNOON. PATCHY DRIZZLE OVERNIGHT AND SATURDAY. WAVES
3 TO 5 FT OCCASIONALLY TO 7 FT SUBSIDING TO 2 TO 4 FT TONIGHT.
WAVES 2 TO 4 FT SATURDAY.

$$

RC





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