Great Lakes Forecast
Issued by NWS

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FZUS63 KLOT 312037
GLFLM

OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
237 PM CST SAT JAN 31 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...HIGH PRESSURE OF 30.4 INCHES FROM SOUTHERN QUEBEC
ACROSS THE OHIO VALLEY TO THE GULF COAST WILL SLOWLY WEAKEN AND
DRIFT EAST INTO SUNDAY. A WEAK LOW IS CROSSING LAKE HURON THIS
AFTERNOON AND ITS ASSOCIATED TROUGH AXIS WILL MOVE SOUTHWARD DOWN
THE REMAINDER OF LAKE MICHIGAN THIS AFTERNOON. SURFACE LOW PRESSURE
IN THE LEE OF THE CENTRAL ROCKIES WILL STRENGTHEN TO AROUND 29.8
INCHES AS IT CONSOLIDATES OVER NORTHERN MISSOURI BY SUNDAY MORNING.
THE LOW WILL THEN DEEPEN TO AROUND 29.4 INCHES AS IT CROSSES THE
OHIO VALLEY INTO SUNDAY NIGHT. HIGH PRESSURE OF 30.5 INCHES WILL
QUICKLY MOVE INTO THE HIGH PLAINS BEHIND THE LOW SUNDAY NIGHT THEN
MOVE EAST TO THE LOWER OHIO VALLEY BY MONDAY NIGHT. ANOTHER LOW
PRESSURE SYSTEM IS FORECAST TO CROSS THE LAKES LATER TUESDAY WITH
ANOTHER STRONG HIGH BUILDING IN WEDNESDAY NIGHT. THIS HIGH WILL
SHIFT EAST OF THE LAKE LATER THURSDAY WHILE A SURFACE LOW MOVES EAST
THROUGH HUDSON BAY.

LMZ261-362-364-366-563-565-567-669-868-870-010500-
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 SHEBOYGAN TO PORT WASHINGTON WI 5 NM OFFSHORE
TO MID LAKE-
LAKE MICHIGAN FROM PENTWATER TO MANISTEE MI 5 NM OFFSHORE TO MID
LAKE-
LAKE MICHIGAN FROM WHITEHALL TO PENTWATER MI 5 NM OFFSHORE TO MID
LAKE-
237 PM CST SAT JAN 31 2015

PORT WASHINGTON WI TO WHITEHALL MI NORTH

.TONIGHT...NORTH WINDS 15 TO 25 KT INCREASING TO 30 KT LATE THIS
EVENING...AND BECOMING NORTHEAST OVERNIGHT. SLIGHT CHANCE OF SNOW THIS
EVENING...THEN CHANCE OF SNOW OVERNIGHT. WAVES 4 TO 7 FT
OCCASIONALLY TO 9 FT BUILDING TO 5 TO 8 FT OCCASIONALLY TO 10 FT
OVERNIGHT.
.SUNDAY...NORTHEAST WINDS TO 30 KT....WITH A FEW GALE FORCE GUSTS
TO 35 KT IN THE AFTERNOON.  CHANCE OF SNOW. WAVES 6 TO 9 FT
OCCASIONALLY TO 11 FT BUILDING TO 8 TO 11 FT OCCASIONALLY TO 14 FT
IN THE AFTERNOON.
.SUNDAY NIGHT...NORTHEAST WINDS TO 30 KT BECOMING NORTH 15 TO
25 KT OVERNIGHT. CHANCE OF SNOW IN THE EVENING...THEN CHANCE OF
SNOW SHOWERS OVERNIGHT. WAVES 8 TO 12 FT OCCASIONALLY TO 15 FT.
.MONDAY...NORTH WINDS 10 TO 20 KT BECOMING WEST 10 TO 15 KT IN
THE AFTERNOON. CHANCE OF SNOW SHOWERS IN THE MORNING...THEN
SLIGHT CHANCE OF SNOW SHOWERS IN THE AFTERNOON. WAVES 6 TO 9 FT
OCCASIONALLY TO 11 FT SUBSIDING TO 4 TO 6 FT OCCASIONALLY TO 8 FT
IN THE AFTERNOON.
.MONDAY NIGHT...SOUTHWEST WINDS 15 TO 25 KT. SLIGHT CHANCE OF
SNOW SHOWERS IN THE EVENING...THEN CHANCE OF SNOW SHOWERS
OVERNIGHT. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT BUILDING TO 4 TO
7 FT OCCASIONALLY TO 9 FT OVERNIGHT.
.TUESDAY...WEST WINDS 10 TO 20 KT. CHANCE OF SNOW SHOWERS. WAVES
4 TO 7 FT OCCASIONALLY TO 9 FT.
.TUESDAY NIGHT...WEST WINDS 10 TO 20 KT BECOMING NORTHWEST. SNOW
SHOWERS LIKELY. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT.
.WEDNESDAY...NORTHWEST WINDS 15 TO 25 KT. CHANCE OF SNOW SHOWERS.
WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT BUILDING TO 4 TO 7 FT
OCCASIONALLY TO 9 FT IN THE AFTERNOON.
.THURSDAY...NORTHWEST WINDS 10 TO 20 KT BECOMING WEST 10 TO 15 KT
IN THE AFTERNOON. WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT SUBSIDING
TO 4 TO 6 FT OCCASIONALLY TO 8 FT IN THE AFTERNOON.

$$

LMZ080-671-673-675-777-779-872-874-876-878-010500-
LAKE MICHIGAN FROM MICHIGAN CITY IN TO ST. JOSEPH MI 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 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-
237 PM CST SAT JAN 31 2015

PORT WASHINGTON WI TO WHITEHALL MI SOUTH

...GALE WARNING IN EFFECT FROM SUNDAY AFTERNOON THROUGH LATE
SUNDAY NIGHT...

.TONIGHT...NORTH WINDS 10 TO 20 KT BECOMING NORTHEAST BY MID EVENING...THEN
INCREASING TO 15 TO 25 KT OVERNIGHT. CHANCE OF SNOW THIS
EVENING...THEN PERIODS OF SNOW OVERNIGHT. WAVES 3 TO 5 FT
OCCASIONALLY TO 7 FT BUILDING TO 5 TO 8 FT OCCASIONALLY TO 10 FT
OVERNIGHT.
.SUNDAY...NORTHEAST WINDS TO 30 KT INCREASING TO GALES TO 40 KT
IN THE AFTERNOON. PERIODS OF SNOW. FREEZING SPRAY IN THE
AFTERNOON. WAVES 6 TO 9 FT OCCASIONALLY TO 11 FT BUILDING TO
10 TO 14 FT OCCASIONALLY TO 18 FT IN THE AFTERNOON.
.SUNDAY NIGHT...NORTHEAST GALES TO 40 KT BECOMING NORTH TO 30 KT
OVERNIGHT. FREEZING SPRAY. PERIODS OF SNOW IN THE EVENING...THEN
SNOW SHOWERS LIKELY OVERNIGHT. WAVES 10 TO 14 FT OCCASIONALLY TO
18 FT.
.MONDAY...NORTH WINDS 15 TO 25 KT BECOMING NORTHWEST 10 TO 15 KT
IN THE AFTERNOON. CHANCE OF SNOW SHOWERS. WAVES 8 TO 12 FT
OCCASIONALLY TO 15 FT SUBSIDING TO 5 TO 8 FT OCCASIONALLY TO
10 FT IN THE AFTERNOON.
.MONDAY NIGHT...SOUTHWEST WINDS 15 TO 25 KT. CHANCE OF SNOW
SHOWERS OVERNIGHT. WAVES 2 TO 4 FT BUILDING TO 4 TO 7 FT
OCCASIONALLY TO 9 FT OVERNIGHT.
.TUESDAY...SOUTHWEST WINDS 15 TO 25 KT. CHANCE OF SNOW SHOWERS.
WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT.
.TUESDAY NIGHT...WEST WINDS 10 TO 20 KT BECOMING NORTHWEST. SNOW
SHOWERS LIKELY. WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT.
.WEDNESDAY...NORTHWEST WINDS 15 TO 25 KT INCREASING TO 30 KT IN
THE AFTERNOON. CHANCE OF SNOW SHOWERS. WAVES 4 TO 6 FT
OCCASIONALLY TO 8 FT.
.THURSDAY...NORTHWEST WINDS 10 TO 20 KT BECOMING WEST 10 TO 15 KT
IN THE AFTERNOON. SLIGHT CHANCE OF SNOW SHOWERS. WAVES 4 TO 6 FT
OCCASIONALLY TO 8 FT IN THE AFTERNOON.

$$

LMZ761-010500-
MAFOR 3122/
MICHIGAN NORTH 11830 12840 14140 11140 19150. CHANCE OF SNOW. WAVES 3
TO 5 FT OCCASIONALLY TO 7 FT BUILDING TO 6 TO 9 FT OCCASIONALLY TO
11 FT LATE TONIGHT...THEN TO 8 TO 11 FT OCCASIONALLY TO 14 FT
SUNDAY AFTERNOON.

MICHIGAN SOUTH...GALE WARNING IN EFFECT...11820 11830 14147 12157.
CHANCE OF SNOW THIS EVENING. PERIODS OF SNOW AFTER MIDNIGHT AND
SUNDAY. FREEZING SPRAY SUNDAY AFTERNOON. WAVES 3 TO 5 FT
OCCASIONALLY TO 7 FT BUILDING TO 6 TO 9 FT OCCASIONALLY TO 11 FT
SUNDAY MORNING...THEN TO 10 TO 14 FT OCCASIONALLY TO 18 FT SUNDAY
MID AFTERNOON.

$$

KMD







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