Great Lakes Forecast
Issued by NWS

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FZUS63 KLOT 161357
GLFLM

OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
857 AM CDT SUN APR 16 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...BROAD LOW PRESSURE OF 29.7 INCHES OVER THE NORTHERN
LAKES WILL REACH NEW ENGLAND TODAY. A TRAILING COLD FRONT FROM
THIS LOW WILL PUSH EAST OF THE LAKE BY MID DAY. HIGH PRESSURE OF
30.1 INCHES WILL BUILD OUT OF THE NORTHERN ROCKIES AND SPREAD INTO
THE NORTHERN AND CENTRAL PLAINS LATER TODAY...THEN SLIDE EAST
ACROSS THE MIDWEST TONIGHT INTO MONDAY. A WEAK TROUGH OF LOW
PRESSURE AVERAGING 30.1 INCHES WILL DEVELOP ACROSS THE UPPER GREAT
LAKES TONIGHT. THE NEXT LOW OF 29.7 INCHES WILL FORM OVER THE
NORTHERN PLAINS MONDAY NIGHT AND THEN PASS OVER LAKE SUPERIOR
TUESDAY EVENING. THE LOWS COLD FRONT SWEEPS ACROSS THE LAKE
TUESDAY NIGHT.

LMZ261-362-364-366-563-565-567-868-162130-
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-
857 AM CDT SUN APR 16 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TODAY...NORTHWEST WINDS 10 TO 20 KT. AREAS OF FOG THIS
MORNING. CHANCE OF RAIN SHOWERS THIS MORNING. WAVES 2 TO 4 FT.
.TONIGHT...NORTH WINDS 10 TO 15 KT BECOMING NORTHEAST. WAVES 1 TO
3 FT.
.MONDAY...NORTHEAST WINDS 10 TO 20 KT. WAVES 1 TO 3 FT.
.MONDAY NIGHT...NORTHEAST WINDS 10 TO 20 KT BECOMING EAST. WAVES
1 TO 3 FT.
.TUESDAY...SOUTHEAST WINDS 10 TO 20 KT BECOMING SOUTH TO 30 KT IN
THE AFTERNOON. CHANCE OF RAIN SHOWERS IN THE AFTERNOON. WAVES
1 TO 3 FT BUILDING TO 3 TO 5 FT OCCASIONALLY TO 7 FT.
.TUESDAY NIGHT...SOUTH WINDS TO 30 KT BECOMING WEST 10 TO 20 KT
OVERNIGHT. CHANCE OF RAIN SHOWERS. WAVES 3 TO 5 FT OCCASIONALLY
TO 7 FT SUBSIDING TO 2 TO 4 FT.
.WEDNESDAY...NORTH WINDS 10 TO 20 KT. WAVES 1 TO 3 FT.
.THURSDAY...NORTHEAST WINDS TO 30 KT. CHANCE OF RAIN SHOWERS.
WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-162130-
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-
857 AM CDT SUN APR 16 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TODAY...WEST WINDS 10 TO 20 KT BECOMING NORTHWEST.
CHANCE OF RAIN SHOWERS THIS MORNING. WAVES 3 TO 5 FT OCCASIONALLY
TO 7 FT SUBSIDING TO 1 TO 3 FT.
.TONIGHT...NORTHWEST WINDS 10 TO 15 KT BECOMING WEST. WAVES 1 TO
3 FT.
.MONDAY...WEST WINDS 10 TO 15 KT VEERING TO NORTHEAST 10 TO
20 KT. WAVES 1 TO 3 FT.
.MONDAY NIGHT...NORTHEAST WINDS 10 TO 20 KT BECOMING EAST. WAVES
1 TO 3 FT.
.TUESDAY...SOUTHEAST WINDS 10 TO 20 KT BECOMING SOUTH 15 TO
25 KT. WAVES 1 TO 3 FT BUILDING TO 3 TO 5 FT OCCASIONALLY TO
7 FT.
.TUESDAY NIGHT...SOUTH WINDS 10 TO 20 KT BECOMING SOUTHWEST.
CHANCE OF RAIN SHOWERS. WAVES 2 TO 4 FT SUBSIDING TO 1 TO 3 FT.
.WEDNESDAY...NORTHWEST WINDS 10 TO 20 KT BECOMING NORTHEAST.
WAVES 1 TO 2 FT.
.THURSDAY...NORTH WINDS 15 TO 25 KT. CHANCE OF RAIN SHOWERS AND
THUNDERSTORMS. WAVES 2 TO 4 FT BUILDING TO 3 TO 5 FT OCCASIONALLY
TO 7 FT.

$$
LMZ761-162130-
MAFOR 1615/
MICHIGAN NORTH 11724 12720 11810 13110 11120. CHANCE OF SHOWERS
WITH AREAS OF FOG LATE THIS MORNING. WAVES 2 TO 4 FT TODAY. WAVES
1 TO 3 FT TONIGHT AND MONDAY MORNING.


MICHIGAN SOUTH 11620 12720 11710 14610. WAVES 3 TO 5 FT
OCCASIONALLY TO 7 FT SUBSIDING TO 2 TO 4 FT TODAY. WAVES 1 TO 3 FT
TONIGHT AND MONDAY MORNING.

$$


KJB

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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