Great Lakes Forecast
Issued by NWS

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000
FZUS63 KLOT 191958
GLFLM

OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
258 PM 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 QUEBEC SOUTH ACROSS
THE OHIO VALLEY TO THE SOUTHERN GULF STATES WILL MOVE SOUTHEAST
AND REACH THE EAST COAST BY MONDAY AFTERNOON. MEANWHILE...LOW
PRESSURE OF 29.1 INCHES OVER MANITOBA 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.

LMZ261-362-364-366-563-565-567-868-200330-
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-
258 PM CDT SUN MAR 19 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TONIGHT...SOUTH WINDS 15 TO 25 KT INCREASING TO 30 KT THIS
EVENING...THEN BECOMING SOUTHWEST 15 TO 25 KT LATE. CHANCE OF RAIN
SHOWERS AND LIGHT FREEZING RAIN THIS EVENING...THEN SLIGHT CHANCE
OF RAIN SHOWERS OVERNIGHT. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT
BUILDING TO 4 TO 6 FT OCCASIONALLY TO 8 FT.
.MONDAY...SOUTHWEST WINDS 10 TO 20 KT VEERING TO NORTH. WAVES
3 TO 5 FT OCCASIONALLY TO 7 FT SUBSIDING TO 2 TO 4 FT.
.MONDAY NIGHT...NORTH WINDS 10 TO 20 KT BACKING TO 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 7 FT
OCCASIONALLY TO 9 FT.
.WEDNESDAY...NORTH 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 2 TO 4 FT.
.WEDNESDAY NIGHT...SOUTHEAST WINDS 10 TO 15 KT BECOMING SOUTH
10 TO 20 KT. WAVES 1 TO 3 FT.
.THURSDAY...SOUTH WINDS TO 30 KT. WAVES 4 TO 6 FT OCCASIONALLY TO
8 FT BUILDING TO 4 TO 7 FT OCCASIONALLY TO 9 FT.
.FRIDAY...SOUTH WINDS TO 30 KT BECOMING SOUTHWEST. RAIN SHOWERS
LIKELY. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-200330-
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-
258 PM CDT SUN MAR 19 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

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

$$

LMZ761-200330-
MAFOR 1921/
MICHIGAN NORTH 11430 13440 11530 11520 11610 11820. CHANCE OF
RAIN SHOWERS AND LIGHT FREEZING RAIN EARLY THIS EVENING. CHANCE OF
LIGHT FREEZING RAIN LATE THIS EVENING. WAVES 3 TO 5 FT
OCCASIONALLY TO 7 FT BUILDING TO 4 TO 6 FT OCCASIONALLY TO 8 FT
TONIGHT. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT SUBSIDING TO 2 TO 4
FT MONDAY.

MICHIGAN SOUTH 12330 13430 11420 11516 11710. CHANCE OF RAIN
SHOWERS LATE THIS EVENING. CHANCE OF RAIN SHOWERS MONDAY. WAVES 2
TO 4 FT BUILDING TO 3 TO 5 FT OCCASIONALLY TO 7 FT TONIGHT. WAVES
2 TO 4 FT MONDAY.

$$


RODRIGUEZ

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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