Great Lakes Forecast
Issued by NWS

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000
FZUS63 KLOT 190745
GLFLM

OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
245 AM CDT SUN MAR 19 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 OF THE HIGHEST 1/3 OF THE WAVE, ALONG WITH THE
AVERAGE HEIGHT OF THE HIGHEST 10% OF THE WAVES WHICH WILL
OCCASIONALLY BE ENCOUNTERED.

.SYNOPSIS...
HIGH PRESSURE OF 30.4 INCHES EXTENDING FROM THE LOWER OHIO VALLEY
ACROSS THE WESTERN LAKES TO JAMES BAY EARLY THIS MORNING WILL MOVE
SOUTHEAST AND REACH THE EAST COAST BY MONDAY AFTERNOON.
MEANWHILE...LOW PRESSURE OF 29.2 INCHES OVER SASKATCHEWAN WILL
DEEPEN TO 28.8 INCHES AS IT REACHES HUDSON BAY TONIGHT. A COLD
FRONT TRAILING SOUTH FROM THIS LOW WILL MOVE ACROSS THE LAKE LATE
TONIGHT INTO MONDAY MORNING. STRONG HIGH PRESSURE OF 30.6 INCHES
WILL BUILD SOUTHEAST FROM THE CANADIAN PRAIRIES INTO THE WESTERN
GREAT LAKES IN THE WAKE OF THIS FRONT. THE HIGH WILL BE CENTERED
OVER THE GREAT LAKES BY WEDNESDAY...THEN MORE SOUTHEAST TO THE MID
ATLANTIC COAST BY THURSDAY AFTERNOON.

LMZ261-362-364-366-563-565-567-868-191515-
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-
245 AM CDT SUN MAR 19 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TODAY...NORTHWEST WINDS AROUND 10 KT BECOMING VARIABLE LESS THAN
10 KT THIS MORNING...THEN BECOMING SOUTH 10 TO 15 KT LATE THIS
MORNING...THEN INCREASING TO 15 TO 25 KT EARLY THIS AFTERNOON
INCREASING TO 30 KT TOWARD EVENING. WAVES 1 TO 2 FT BUILDING TO 2
TO 4 FT.
.TONIGHT...SOUTH WINDS TO 30 KT BECOMING SOUTHWEST. CHANCE OF
SHOWERS. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT.
.MONDAY...SOUTHWEST WINDS 10 TO 20 KT VEERING TO NORTH. WAVES
2 TO 4 FT SUBSIDING TO 1 TO 3 FT.
.MONDAY NIGHT...NORTH WINDS 10 TO 20 KT BECOMING WEST. WAVES 1 TO
3 FT.
.TUESDAY...NORTHWEST WINDS 15 TO 25 KT BECOMING NORTH TO 30 KT.
WAVES 2 TO 4 FT BUILDING TO 3 TO 5 FT OCCASIONALLY TO 7 FT.
.TUESDAY NIGHT...NORTH WINDS TO 30 KT. WAVES 4 TO 6 FT
OCCASIONALLY TO 8 FT.
.WEDNESDAY...NORTH WINDS 15 TO 25 KT DIMINISHING TO 10 TO 15 KT
IN THE AFTERNOON. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT SUBSIDING
TO 2 TO 4 FT.
.THURSDAY...SOUTH WINDS TO 30 KT. WAVES 3 TO 5 FT OCCASIONALLY TO
7 FT.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-191515-
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-
245 AM CDT SUN MAR 19 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TODAY...NORTH WINDS 10 TO 15 KT VEERING TO SOUTHEAST LATE THIS
MORNING...THEN GRADUALLY INCREASING TO 15 TO 25 KT BY EVENING.
WAVES 1 TO 3 FT BUILDING TO 2 TO 4 FT LATE.
.TONIGHT...SOUTHEAST WINDS 15 TO 25 KT BECOMING SOUTH 10 TO
20 KT. CHANCE OF SHOWERS AND SLIGHT CHANCE OF THUNDERSTORMS
OVERNIGHT. WAVES 2 TO 4 FT.
.MONDAY...SOUTH WINDS 10 TO 20 KT SHIFTING TO NORTH. CHANCE OF
RAIN SHOWERS IN THE MORNING. WAVES 2 TO 4 FT.
.MONDAY NIGHT...NORTH WINDS 10 TO 20 KT. WAVES 2 TO 4 FT.
.TUESDAY...NORTH WINDS 10 TO 20 KT INCREASING TO 15 TO 25 KT.
WAVES BUILDING TO 3 TO 5 FT OCCASIONALLY TO 7 FT.
.TUESDAY NIGHT...NORTH WINDS TO 30 KT BECOMING NORTHEAST. WAVES
4 TO 7 FT OCCASIONALLY TO 9 FT.
.WEDNESDAY...NORTHEAST WINDS 15 TO 25 KT DIMINISHING TO 10 TO
15 KT IN THE AFTERNOON. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT
SUBSIDING TO 3 TO 5 FT OCCASIONALLY TO 7 FT.
.THURSDAY...SOUTH WINDS TO 30 KT BECOMING SOUTHEAST. WAVES 3 TO
5 FT OCCASIONALLY TO 7 FT.

$$

LMZ761-191515-
MAFOR 1909/
MICHIGAN NORTH 11710 11900 11410 11430 14440. CHANCE OF SHOWERS
TONIGHT. WAVES 1 TO 2 FT BUILDING TO 2 TO 4 FT TODAY AND
INCREASING TO 3 TO 5 FT OCCASIONALLY TO 7 FT TONIGHT.

MICHIGAN SOUTH 10810 11110 11210 11310 11320 13330 11426. WAVES 1
TO 3 FT BUILDING TO 2 TO 4 FT LATE THIS AFTERNOON AND CONTINUING
TONIGHT.

$$

IZZI

EXPERIMENTAL MODERNIZED OPEN LAKE FORECAST IS AVAILABLE ONLINE AT
WEATHER.GOV/LOT/GLFTABLE

GRAPHICAL MARINE FORECASTS ARE AVAILABLE ONLINE AT:
WEATHER.GOV/GREATLAKES



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