Great Lakes Forecast
Issued by NWS

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FZUS63 KLOT 230853
GLFLM

OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
253 AM CST TUE DEC 23 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...LOW PRESSURE OF 29.4 INCHES OVER IOWA WILL MOVE INTO
WISCONSIN AND WEAKEN TO 29.7 INCHES TODAY...THEN DISSIPATE THIS
EVENING. A SECOND LOW OF 29.5 INCHES WILL DEVELOP LATER TODAY NEAR
THE CENTRAL GULF COAST...THEN RACE NORTHWARD OVER INDIANA...WHILE
DEEPENING TO NEAR 29.2 INCHES BY MID DAY WEDNESDAY. THIS LOW WILL
CONTINUE DEEPENING TO NEAR 28.9 INCHES WEDNESDAY EVENING WHILE
MOVING ACROSS LOWER MICHIGAN. ANOTHER LOW PRESSURE OF 29.3 INCHES
OVER THE CENTRAL HIGH PLAINS ON THURSDAY EVENING WILL TRACK TOWARD
THE UPPER MISSISSIPPI VALLEY BY FRIDAY EVENING WHILE WEAKENING TO
29.6 INCHES.

LMZ261-362-364-366-563-565-567-868-231645-
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-
253 AM CST TUE DEC 23 2014

SHEBOYGAN WI TO PENTWATER MI NORTH

...GALE WATCH IN EFFECT FROM WEDNESDAY EVENING THROUGH LATE
WEDNESDAY NIGHT...

.TODAY...EAST WINDS TO 30 KT BECOMING SOUTHEAST AND DIMINISHING
TO 10 TO 20 KT. RAIN THIS MORNING...THEN CHANCE OF RAIN SHOWERS
THIS AFTERNOON. WAVES 6 TO 9 FT OCCASIONALLY TO 11 FT SUBSIDING TO
4 TO 7 FT OCCASIONALLY TO 9 FT.
.TONIGHT...SOUTH WINDS 10 TO 20 KT BECOMING SOUTHWEST 10 TO
15 KT AND THEN VARIABLE 5 TO 10 KT BY DAYBREAK. CHANCE OF RAIN IN
THE EVENING...THEN SLIGHT CHANCE OF RAIN AND SNOW OVERNIGHT. WAVES
3 TO 5 FT OCCASIONALLY TO 7 FT SUBSIDING TO 2 TO 4 FT OVERNIGHT.
.WEDNESDAY...NORTHEAST WINDS 10 TO 15 KT BECOMING NORTH TO 30 KT
IN THE AFTERNOON. SNOW LIKELY IN THE AFTERNOON. WAVES BUILDING TO
4 TO 7 FT OCCASIONALLY TO 9 FT IN THE AFTERNOON.
.WEDNESDAY NIGHT...NORTHWEST GALES TO 35 KT. CHANCE OF SNOW IN
THE EVENING...THEN CHANCE OF SNOW SHOWERS OVERNIGHT. WAVES
BUILDING TO 7 TO 10 FT OCCASIONALLY TO 13 FT OVERNIGHT.
.THURSDAY...WEST WINDS TO 30 KT DIMINISHING TO 15 TO 25 KT. SLIGHT
CHANCE OF SNOW SHOWERS IN THE MORNING. WAVES SUBSIDING TO 4 TO 6
FT OCCASIONALLY TO 8 FT IN THE AFTERNOON.
.THURSDAY NIGHT...SOUTHWEST WINDS 10 TO 20 KT. WAVES 3 TO 5 FT
OCCASIONALLY TO 7 FT.
.FRIDAY...SOUTH WINDS 10 TO 20 KT. SLIGHT CHANCE OF RAIN OR SNOW.
WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT.
.SATURDAY...NORTHWEST WINDS 15 TO 25 KT. CHANCE OF SNOW SHOWERS.
WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT BUILDING TO 4 TO 6 FT
OCCASIONALLY TO 8 FT IN THE AFTERNOON.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-231645-
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-
253 AM CST TUE DEC 23 2014

SHEBOYGAN WI TO PENTWATER MI SOUTH

...GALE WATCH IN EFFECT FROM WEDNESDAY AFTERNOON THROUGH LATE
WEDNESDAY NIGHT...

.TODAY...SOUTHEAST WINDS 20 TO 25 KT BECOMING SOUTH 10 TO 20 KT BY
MIDDAY. RAIN EARLY THIS MORNING...THEN A CHANCE OF RAIN THIS
AFTERNOON. WAVES 6 TO 9 FT OCCASIONALLY TO 11 FT SUBSIDING TO 4 TO
7 FT OCCASIONALLY TO 9 FT THIS AFTERNOON.
.TONIGHT...SOUTHWEST WINDS 10 TO 20 KT BECOMING WEST 5 TO 10 KT
AFTER MIDNIGHT...THEN VEERING TO NORTH LATE. SLIGHT CHANCE OF
RAIN AND SNOW OVERNIGHT. WAVES SUBSIDING TO 1 TO 3 FT OVERNIGHT.
.WEDNESDAY...NORTH WINDS 10 TO 20 KT INCREASING TO GALES TO 35 KT
IN THE AFTERNOON. SNOW AND SLIGHT CHANCE OF RAIN IN THE AFTERNOON.
WAVES BUILDING TO 5 TO 8 FT OCCASIONALLY TO 10 FT IN THE
AFTERNOON.
.WEDNESDAY NIGHT...NORTHWEST GALES TO 35 KT EASING TO 30 KT
OVERNIGHT. SNOW LIKELY WITH SLIGHT CHANCE OF RAIN IN THE
EVENING...THEN CHANCE OF SNOW SHOWERS OVERNIGHT. WAVES 8 TO 11 FT
OCCASIONALLY TO 14 FT.
.THURSDAY...WEST WINDS TO 30 KT DIMINISHING TO 15 TO 25 KT. SLIGHT
CHANCE OF SNOW SHOWERS IN THE MORNING. WAVES SUBSIDING TO 4 TO 7 FT
OCCASIONALLY TO 9 FT IN THE AFTERNOON.
.THURSDAY NIGHT...SOUTHWEST WINDS 15 TO 25 KT. WAVES 4 TO 6 FT
OCCASIONALLY TO 8 FT.
.FRIDAY...SOUTH WINDS 15 TO 25 KT. WAVES 4 TO 7 FT OCCASIONALLY
TO 9 FT.
.SATURDAY...WEST WINDS TO 30 KT. CHANCE OF SNOW SHOWERS. WAVES
4 TO 7 FT OCCASIONALLY TO 9 FT.

$$

LMZ761-231645-
MAFOR 2310/
MICHIGAN NORTH 12246 11336 11330 11320 11420 11410 11510. PERIODS
OF RAIN TODAY. CHANCE OF RAIN TONIGHT. WAVES 6 TO 9 FT OCCASIONALLY TO
11 FT SUBSIDING TO 4 TO 7 FT OCCASIONALLY TO 9 FT TODAY...AND TO 2
TO 4 FT TONIGHT.

MICHIGAN SOUTH 11336 11430 13420 11520 11510 11600. RAIN EARLY
THIS MORNING THEN CHANCE OF RAIN THIS AFTERNOON. WAVES 6 TO 9 FT
OCCASIONALLY TO 11 FT SUBSIDING TO 4 TO 7 FT OCCASIONALLY TO 9 FT
TODAY...AND TO 1 TO 3 FT TONIGHT.

$$

KJB




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