Great Lakes Forecast
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000
FZUS63 KLOT 220755
GLFLM

OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
255 AM CDT WED MAR 22 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...STRONG HIGH PRESSURE OF 30.7 INCHES WILL BUILD
SOUTHEAST FROM SOUTHWESTERN ONTARIO INTO THE WESTERN GREAT LAKES
REGION TODAY. THE HIGH WILL THEN MOVE SOUTHEAST TO THE MID
ATLANTIC COAST BY THURSDAY AFTERNOON. LOW PRESSURE OF 29.4 INCHES
WILL THEN DEVELOP OVER THE CENTRAL HIGH PLAINS THURSDAY INTO
FRIDAY. THE LOW WILL WEAKEN A BIT TO 29.7 INCHES AS IT MOVES
SLOWLY NORTHEAST TOWARD AND INTO NORTHERN ILLINOIS OVER THE
WEEKEND.

LMZ261-362-364-366-563-565-567-868-221530-
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-
255 AM CDT WED MAR 22 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TODAY...NORTH WINDS 20 TO 25 KT EASING TO 10 TO 20 KT THIS
MORNING...THEN DIMINISHING TO 5 TO 10 KT AND BECOMING VARIABLE THIS
AFTERNOON. WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT SUBSIDING TO 1 TO
3 FT.
.TONIGHT...SOUTHEAST WINDS AROUND 10 KT BECOMING SOUTH 15 TO 25
KT. WAVES 1 TO 3 FT BUILDING TO 2 TO 4 FT.
.THURSDAY...SOUTH WINDS TO 30 KT. WAVES 3 TO 5 FT OCCASIONALLY TO
7 FT BUILDING TO 5 TO 8 FT OCCASIONALLY TO 10 FT.
.THURSDAY NIGHT...SOUTH WINDS TO 30 KT DIMINISHING TO 15 TO
25 KT. RAIN SHOWERS LIKELY WITH A CHANCE OF THUNDERSTORMS. WAVES
SUBSIDING TO 4 TO 6 FT OCCASIONALLY TO 8 FT.
.FRIDAY...SOUTHWEST WINDS 10 TO 20 KT VEERING TO NORTH 10 TO
15 KT. RAIN SHOWERS LIKELY WITH A CHANCE OF THUNDERSTORMS. WAVES
2 TO 4 FT.
.FRIDAY NIGHT...NORTHEAST WINDS 10 TO 20 KT INCREASING TO 15 TO
25 KT. RAIN SHOWERS LIKELY. WAVES 2 TO 4 FT BUILDING TO 3 TO 5 FT
OCCASIONALLY TO 7 FT.
.SATURDAY...NORTHEAST WINDS TO 30 KT BECOMING EAST. CHANCE OF
RAIN SHOWERS. WAVES 5 TO 8 FT OCCASIONALLY TO 10 FT.
.SUNDAY...EAST WINDS 20 TO 25 KT. RAIN SHOWERS LIKELY. WAVES
SUBSIDING TO 4 TO 6 FT OCCASIONALLY TO 8 FT.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-221530-
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-
255 AM CDT WED MAR 22 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TODAY...NORTHEAST WINDS TO 30 KT EASING TO 15 TO 25 KT THIS
MORNING...THEN DIMINISHING TO 10 TO 15 KT THIS AFTERNOON. WAVES 7
TO 10 FT OCCASIONALLY TO 13 FT SUBSIDING TO 3 TO 5 FT
OCCASIONALLY TO 7 FT.
.TONIGHT...NORTHEAST WINDS 10 TO 15 KT VEERING TO SOUTH 10 TO
20 KT. WAVES 2 TO 4 FT.
.THURSDAY...SOUTH WINDS 15 TO 25 KT INCREASING TO 30 KT. CHANCE
OF RAIN SHOWERS IN THE AFTERNOON. WAVES 3 TO 5 FT OCCASIONALLY TO
7 FT BUILDING TO 4 TO 7 FT OCCASIONALLY TO 9 FT.
.THURSDAY NIGHT...SOUTH WINDS 15 TO 25 KT. RAIN SHOWERS LIKELY
WITH A CHANCE OF THUNDERSTORMS IN THE EVENING...THEN CHANCE OF
RAIN SHOWERS AND THUNDERSTORMS OVERNIGHT. WAVES 4 TO 7 FT
OCCASIONALLY TO 9 FT.
.FRIDAY...SOUTHWEST WINDS 15 TO 25 KT. CHANCE OF RAIN SHOWERS.
WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT.
.FRIDAY NIGHT...SOUTHWEST WINDS 10 TO 20 KT SHIFTING TO THE
NORTHEAST 15 TO 25 KT DURING THE EVENING. PATCHY FOG. RAIN
SHOWERS. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT.
.SATURDAY...EAST WINDS TO 30 KT. PATCHY FOG. RAIN SHOWERS. WAVES
4 TO 6 FT OCCASIONALLY TO 8 FT BUILDING TO 6 TO 9 FT OCCASIONALLY
TO 11 FT.
.SUNDAY...EAST WINDS 20 TO 25 KT DIMINISHING TO 10 TO 20 KT.
PATCHY FOG. RAIN SHOWERS LIKELY. WAVES 4 TO 6 FT OCCASIONALLY TO 8
FT SUBSIDING TO 2 TO 4 FT.

$$

LMZ761-221530-
MAFOR 2209/
MICHIGAN NORTH 11830 12820 12900 11300 11410 11420 19430. WAVES 4
TO 7 FT OCCASIONALLY TO 9 FT SUBSIDING TO 1 TO 3 FT TODAY. WAVES
1 TO 3 FT TONIGHT.

MICHIGAN SOUTH 11140 11130 11120 13110 12320. WAVES 7 TO 10 FT
OCCASIONALLY TO 13 FT SUBSIDING TO 3 TO 5 FT OCCASIONALLY TO 7 FT
TODAY...AND TO 2 TO 4 FT TONIGHT.

$$


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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