Great Lakes Forecast
Issued by NWS

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000
FZUS63 KLOT 121449
GLFLM

OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
849 AM CST THU JAN 12 2017

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 LOW PRESSURE TROUGH AVERAGING 29.7 INCHES WHICH
STRETCHES FROM SOUTHEAST ONTARIO THROUGH THE RED RIVER VALLEY WILL
CONTINUE TO SAG SOUTH AND EAST THROUGH TODAY. A 29.5 INCH LOW
OVER SOUTHERN MANITOBA WILL WEAKEN TO 29.8 INCHES AS IT PASSES
THROUGH SOUTHERN ONTARIO THIS EVENING. AN ASSOCIATED COLD FRONT
WILL PASS OVER THE LAKE THIS EVENING AS WELL. HIGH PRESSURE OF
30.8 INCHES CENTERED OVER THE NORTHERN PLAINS WILL SPREAD OVER
THE PLAINS AND UPPER MISSISSIPPI VALLEY TONIGHT AND PASS OVER THE
LAKE FRIDAY AFTERNOON AND EVENING. THE CENTER OF THE HIGH WILL
PUSH EAST TO NEW ENGLAND BY SATURDAY AFTERNOON...BUT A RIDGE AXIS
WILL STILL EXTEND WEST ACROSS THE GREAT LAKES...KEEPING HIGH
PRESSURE AS THE DOMINANT FEATURE OVER THE LAKES INTO EARLY NEXT
WEEK. LOW PRESSURE OF 29.7 INCHES IS EXPECTED TO DEVELOP OVER THE
SOUTHERN PLAINS SUNDAY NIGHT AND THE LOW MAY TRACK ACROSS LAKE
MICHIGAN TUESDAY AFTERNOON OR EVENING.

LMZ261-362-364-563-122230-
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 ROCK ISLAND PASSAGE TO STURGEON BAY WI-
849 AM CST THU JAN 12 2017

STURGEON BAY WI TO POINT BETSIE MI NORTH...

...GALE WARNING IN EFFECT FROM 6 PM CST THIS EVENING THROUGH
MIDNIGHT...

.REST OF TODAY...NORTH WINDS 10 TO 20 KT BECOMING NORTHWEST LATE
THIS MORNING...THEN BECOMING WEST EARLY THIS AFTERNOON INCREASING
TO 30 KT LATE. CHANCE OF SNOW THROUGH MID MORNING. WAVES 2 TO
4 FT BUILDING TO 4 TO 6 FT OCCASIONALLY TO 8 FT.
.TONIGHT...WEST GALES TO 35 KT BECOMING NORTHWEST TO 30 KT AFTER
MIDNIGHT. FREEZING SPRAY. WAVES 6 TO 9 FT OCCASIONALLY TO
11 FT SUBSIDING TO 4 TO 7 FT OCCASIONALLY TO 9 FT.
.FRIDAY...NORTHWEST WINDS 10 TO 20 KT DIMINISHING TO LESS THAN
10 KT. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT SUBSIDING TO 1 TO
3 FT.
.FRIDAY NIGHT...SOUTHWEST WINDS 10 TO 15 KT INCREASING TO 10 TO
20 KT. WAVES 1 FT OR LESS BUILDING TO 1 TO 3 FT.
.SATURDAY...SOUTHWEST WINDS 10 TO 20 KT BECOMING WEST. WAVES 2 TO
4 FT.
.SATURDAY NIGHT...WEST WINDS 10 TO 20 KT DIMINISHING TO 10 TO
15 KT. WAVES 1 TO 3 FT.
.SUNDAY...WEST WINDS 5 TO 10 KT BECOMING SOUTHWEST 10 TO 20 KT IN
THE AFTERNOON. WAVES 1 TO 2 FT.
.MONDAY...SOUTH WINDS 10 TO 15 KT BECOMING SOUTHEAST 10 TO 20 KT.
WAVES 1 TO 2 FT.

$$

LMZ080-366-565-567-669-671-673-675-777-779-868-870-872-874-876-
878-122230-
LAKE MICHIGAN FROM MICHIGAN CITY IN TO ST. JOSEPH MI 5 NM
OFFSHORE TO MID LAKE-
LAKE MICHIGAN FROM POINT BETSIE TO MANISTEE MI 5 NM OFFSHORE TO
MID LAKE-
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 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 PENTWATER TO MANISTEE MI 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-
849 AM CST THU JAN 12 2017

STURGEON BAY WI TO POINT BETSIE MI SOUTH...

.REST OF TODAY...NORTH WINDS 15 TO 25 KT BECOMING WEST TO 30 KT.
CHANCE OF SNOW AND DRIZZLE THROUGH MID MORNING. WAVES 4 TO 6 FT
OCCASIONALLY TO 8 FT.
.TONIGHT...NORTHWEST WINDS TO 30 KT. FREEZING SPRAY. WAVES 5 TO 8
FT OCCASIONALLY TO 10 FT.
.FRIDAY...NORTH WINDS 10 TO 20 KT BECOMING NORTHEAST. WAVES 4 TO
7 FT OCCASIONALLY TO 9 FT SUBSIDING TO 3 TO 5 FT OCCASIONALLY TO
7 FT.
.FRIDAY NIGHT...EAST WINDS 10 TO 20 KT BECOMING SOUTHEAST. WAVES
1 TO 3 FT.
.SATURDAY...SOUTH WINDS 10 TO 15 KT VEERING TO WEST. WAVES 1 TO
2 FT.
.SATURDAY NIGHT...NORTHWEST WINDS 10 TO 20 KT DIMINISHING TO
10 TO 15 KT. WAVES 1 TO 2 FT.
.SUNDAY...NORTHWEST WINDS 5 TO 10 KT BACKING TO SOUTH. WAVES 1 TO
2 FT.
.MONDAY...SOUTHEAST WINDS 10 TO 20 KT. CHANCE OF RAIN AND SNOW.
WAVES 1 TO 3 FT.

$$
LMZ761-122230-
MAFOR 1216/
MICHIGAN NORTH...GALE WARNING IN EFFECT...11820 11720 12640 12650
12740. CHANCE OF SNOW LATE THIS MORNING. WAVES 2 TO 4 FT BUILDING
TO 4 TO 6 FT OCCASIONALLY TO 8 FT TODAY. WAVES 6 TO 9 FT
OCCASIONALLY TO 11 FT SUBSIDING TO 4 TO 7 FT OCCASIONALLY TO 9 FT
TONIGHT. WAVES 4 TO 6 FT FRIDAY MORNING.

MICHIGAN SOUTH 11830 11730 12640 13740 11830. CHANCE OF SNOW LATE
THIS MORNING. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT TODAY. WAVES 5
TO 8 FT OCCASIONALLY TO 10 FT TONIGHT. WAVES 4 TO 7 FT
OCCASIONALLY TO 9 FT FRIDAY MORNING.

$$

EXPERIMENTAL MODERNIZED OPEN LAKE FORECAST IS AVAILABLE ONLINE AT
WEATHER.GOV/LOT/GLFTABLE (ALL LOWER CASE)

GRAPHICAL MARINE FORECASTS ARE AVAILABLE ONLINE AT
WEATHER.GOV/GREATLAKES (ALL LOWER CASE)


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