Great Lakes Forecast
Issued by NWS

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FZUS63 KLOT 211019 CCA
GLFLM

OPEN LAKE FORECAST FOR LAKE MICHIGAN...CORRECTED
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
410 AM CST SAT FEB 21 2015

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...A 30.5 INCH HIGH IS ALONG THE EASTERN SEABOARD EARLY
THIS MORNING...WITH A TROUGH OF LOW PRESSURE AVERAGING 29.8
INCHES STRETCHES FROM THE LOWER MISSISSIPPI VALLEY THROUGH THE
NORTHERN GREAT LAKES. THE TROUGH WILL WEAKEN TO 29.9 INCHES AS IT
MOVES OVER LAKE MICHIGAN THIS MORNING AND WILL REACH THE ATLANTIC
COAST AT AROUND 30.1 INCHES SUNDAY MORNING. AN EXPANSIVE 31.0 HIGH
PRESSURE WILL SPREAD FROM THE NORTHERN PLAINS SUNDAY MORNING TO
THE OHIO VALLEY AND POINTS SOUTH MONDAY NIGHT INTO TUESDAY WHILE
WEAKENING TO 30.4 INCHES. MEANWHILE...A 29.3 INCH LOW PRESSURE
CENTER WILL MOVE FROM NEAR HUDSON BAY LATE MONDAY NIGHT TO NEW
BRUNSWICK WEDNESDAY EVENING.

LMZ261-362-364-366-563-565-567-868-211745-
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-
410 AM CST SAT FEB 21 2015

SHEBOYGAN WI TO PENTWATER MI NORTH

.TODAY...SOUTHWEST WINDS 10 TO 15 KT BECOMING NORTHWEST 5 TO 10 KT
EARLY THIS AFTERNOON...THEN NORTH 10 TO 15 KT LATE. SLIGHT CHANCE
OF SNOW. WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT SUBSIDING TO 1 TO 2
FT THIS AFTERNOON.
.TONIGHT...NORTH WINDS 10 TO 20 KT INCREASING TO 15 TO 25 KT...
THEN BECOMING NORTHWEST LATE. CHANCE OF SNOW SHOWERS. WAVES
BUILDING TO 4 TO 6 FT OCCASIONALLY TO 8 FT OVERNIGHT.
.SUNDAY...NORTHWEST WINDS 15 TO 25 KT. CHANCE OF SNOW SHOWERS.
WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT.
.SUNDAY NIGHT...NORTHWEST WINDS 15 TO 25 KT. SLIGHT CHANCE OF
SNOW SHOWERS. WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT.
.MONDAY...WEST WINDS 10 TO 20 KT BECOMING SOUTHWEST TO 30 KT IN
THE AFTERNOON. SLIGHT CHANCE OF SNOW SHOWERS. WAVES 4 TO 7 FT
OCCASIONALLY TO 9 FT.
.MONDAY NIGHT...SOUTHWEST WINDS TO 30 KT INCREASING TO GALES TO
40 KT. HEAVY FREEZING SPRAY. SNOW SHOWERS LIKELY. WAVES BUILDING
TO 10 TO 14 FT OCCASIONALLY TO 18 FT OVERNIGHT.
.TUESDAY...WEST GALES TO 35 KT BECOMING NORTHWEST TO 30 KT IN THE
AFTERNOON THEN EASING TO 15 TO 25 KT OVERNIGHT. HEAVY FREEZING
SPRAY IN THE MORNING THEN FREEZING SPRAY IN THE AFTERNOON. SNOW
SHOWERS LIKELY. WAVES 10 TO 14 FT OCCASIONALLY TO 18 FT SUBSIDING
TO 5 TO 8 FT OCCASIONALLY TO 10 FT OVERNIGHT.
.WEDNESDAY...NORTHWEST WINDS 15 TO 25 KT DIMINISHING TO 10 TO 15
KT OVERNIGHT. CHANCE OF SNOW SHOWERS. WAVES 5 TO 8 FT
OCCASIONALLY TO 10 FT SUBSIDING TO 3 TO 5 FT OCCASIONALLY TO 7 FT
OVERNIGHT.

WAVE FORECAST IS FOR ICE FREE AREAS

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-211745-
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-
410 AM CST SAT FEB 21 2015

SHEBOYGAN WI TO PENTWATER MI SOUTH

.TODAY...SOUTHWEST WINDS 10 TO 15 KT BECOMING WEST 5 TO 10 KT
EARLY THIS AFTERNOON AND THEN NORTHWEST 10 TO 15 KT LATE. SLIGHT
CHANCE OF SNOW THIS MORNING. WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT
SUBSIDING TO 1 TO 3 FT THIS AFTERNOON.
.TONIGHT...NORTHWEST WINDS 10 TO 20 KT INCREASING TO 15 TO 25 KT
LATE. CHANCE OF SNOW SHOWERS. WAVES BUILDING TO 4 TO 6 FT
OCCASIONALLY TO 8 FT OVERNIGHT.
.SUNDAY...NORTHWEST WINDS 20 TO 25 KT...WITH A FEW GUSTS TO 30 KT
IN THE AFTERNOON. CHANCE OF SNOW SHOWERS. WAVES BUILDING TO 5 TO
8 FT OCCASIONALLY TO 10 FT.
.SUNDAY NIGHT...NORTHWEST WINDS 15 TO 25 KT. SNOW SHOWERS LIKELY
IN THE EVENING...THEN CHANCE OF SNOW SHOWERS OVERNIGHT. WAVES 5
TO 8 FT OCCASIONALLY TO 10 FT.
.MONDAY...WEST WINDS 15 TO 25 KT BECOMING SOUTHWEST 20 TO 25 KT IN
THE AFTERNOON. CHANCE OF SNOW SHOWERS IN THE MORNING...THEN
SLIGHT CHANCE OF SNOW SHOWERS IN THE AFTERNOON. WAVES 4 TO 7 FT
OCCASIONALLY TO 9 FT.
.MONDAY NIGHT...SOUTHWEST WINDS TO 30 KT INCREASING TO GALES TO
40 KT OVERNIGHT. HEAVY FREEZING SPRAY. SLIGHT CHANCE OF SNOW
SHOWERS. WAVES BUILDING TO 10 TO 14 FT OCCASIONALLY TO 18 FT
OVERNIGHT.
.TUESDAY...WEST GALES TO 40 KT EASING TO 35 KT IN THE AFTERNOON
AND THEN BECOMING NORTHWEST TO 30 KT OVERNIGHT. HEAVY FREEZING
SPRAY THROUGH THE AFTERNOON...THEN FREEZING SPRAY OVERNIGHT.
CHANCE OF SNOW SHOWERS. WAVES 10 TO 14 FT OCCASIONALLY TO 18 FT
SUBSIDING TO 5 TO 8 FT OCCASIONALLY TO 10 FT OVERNIGHT.
.WEDNESDAY...NORTHWEST WINDS TO 30 KT EASING TO 15 TO 25 KT IN
THE AFTERNOON THEN 10 TO 20 KT OVERNIGHT. CHANCE OF SNOW SHOWERS.
WAVES 5 TO 8 FT OCCASIONALLY TO 10 FT SUBSIDING TO 4 TO 6 FT
OCCASIONALLY TO 8 FT OVERNIGHT.

WAVE FORECAST IS FOR ICE FREE AREAS

$$

LMZ761-211745-
MAFOR 2110/
MICHIGAN NORTH 11510 11600 11700 11800 11810 11820 11830 11730.
CHANCE OF SNOW SHOWERS TONIGHT. WAVES 4 TO 7 FT OCCASIONALLY TO 9
FT SUBSIDING TO 1 TO 2 FT THIS AFTERNOON THEN BUILDING TO 4 TO 6
FT OCCASIONALLY TO 8 FT TONIGHT.

MICHIGAN SOUTH 10520 11510 11600 11700 11710 13720 11730. CHANCE
OF SNOW SHOWERS TONIGHT. WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT
SUBSIDING TO 1 TO 3 FT THIS AFTERNOON THEN BUILDING TO 4 TO 6 FT
OCCASIONALLY TO 8 FT TONIGHT.

$$

RC







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