Great Lakes Forecast
Issued by NWS

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000
FZUS63 KLOT 270124
GLFLM

OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
824 PM CDT WED APR 26 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...LOW PRESSURE OF 29.4 INCHES OVER THE UPPER PENINSULA
OF MICHIGAN WILL FILL OVERNIGHT...AS ANOTHER AREA OF LOW PRESSURE
OF 29.4 INCHES NEAR ST LOUIS MOVES OVER LAKE MICHIGAN AND DEEPENS
TO 29.2 INCHES BY THURSDAY MORNING. THIS LOW WILL THEN BEGIN TO
SLOWLY FILL AS IT LIFTS NORTHEAST ACROSS THE NORTHERN LAKES AND
INTO ONTARIO BY THURSDAY EVENING. WEAK HIGH PRESSURE OF 29.9
INCHES WILL DEVELOP ACROSS THE LAKE FRIDAY AS THE LOW CONTINUES TO
MOVE AWAY TO THE NORTH. LOW PRESSURE OF 29.5 INCHES WILL DEVELOP
OVER THE SOUTHERN PLAINS SATURDAY AND WILL DEEPEN TO 29.3 INCHES
AS IT LIFTS NORTHEAST INTO IOWA SUNDAY NIGHT...AND TO 29.2 INCHES
AS IT MOVES TO THE NORTHERN GREAT LAKES ON MONDAY.

LMZ261-362-364-366-563-565-567-868-270930-
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-
824 PM CDT WED APR 26 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TONIGHT...SOUTH WINDS 10 TO 15 KT BECOMING NORTH 10 TO 20
KT AFTER MIDNIGHT. RAIN SHOWERS LIKELY OVERNIGHT. WAVES 2 TO 4
FT.
.THURSDAY...SOUTHWEST WINDS 15 TO 20 KT INCREASING TO 30 KT. RAIN
SHOWERS LIKELY. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT.
.THURSDAY NIGHT...SOUTHWEST WINDS 15 TO 25 KT. WAVES 3 TO 5 FT
OCCASIONALLY TO 7 FT.
.FRIDAY...SOUTHWEST WINDS 15 TO 25 KT DIMINISHING TO 10 TO 20 KT.
WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT.
.FRIDAY NIGHT...NORTH WINDS 10 TO 20 KT INCREASING TO 30 KT
OVERNIGHT. CHANCE OF RAIN SHOWERS IN THE EVENING. WAVES 1 TO
3 FT.
.SATURDAY...NORTH WINDS 15 TO 25 KT. WAVES 2 TO 4 FT.
.SATURDAY NIGHT...NORTHEAST WINDS 15 TO 25 KT INCREASING TO
30 KT. RAIN SHOWERS LIKELY. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT.
.SUNDAY...EAST WINDS TO 30 KT BECOMING NORTHEAST GALES TO 35 KT.
RAIN AND SNOW SHOWERS LIKELY. WAVES 4 TO 7 FT OCCASIONALLY TO
9 FT BUILDING TO 5 TO 8 FT OCCASIONALLY TO 10 FT.
.MONDAY...SOUTHEAST WINDS TO 30 KT VEERING TO SOUTHWEST. CHANCE
OF RAIN SHOWERS. WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT BUILDING TO
5 TO 8 FT OCCASIONALLY TO 10 FT.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-270930-
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-
824 PM CDT WED APR 26 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TONIGHT...SOUTH WINDS 10 TO 20 KT. RAIN SHOWERS AND
SLIGHT CHANCE OF THUNDERSTORMS OVERNIGHT. WAVES 2 TO 4 FT.
.THURSDAY...SOUTHWEST WINDS 15 TO 25 KT. RAIN SHOWERS LIKELY.
WAVES 2 TO 4 FT BUILDING TO 4 TO 6 FT OCCASIONALLY TO 8 FT.
.THURSDAY NIGHT...SOUTHWEST WINDS 10 TO 20 KT. WAVES 3 TO 5 FT
OCCASIONALLY TO 7 FT SUBSIDING TO 1 TO 3 FT.
.FRIDAY...SOUTH WINDS 10 TO 15 KT BECOMING EAST. CHANCE OF RAIN
SHOWERS IN THE AFTERNOON. WAVES 1 TO 2 FT.
.FRIDAY NIGHT...NORTHEAST WINDS 10 TO 20 KT BECOMING NORTH TO
30 KT OVERNIGHT. CHANCE OF RAIN SHOWERS IN THE EVENING. WAVES
1 TO 2 FT BUILDING TO 2 TO 4 FT.
.SATURDAY...NORTH WINDS TO 30 KT BECOMING NORTHEAST. CHANCE OF
RAIN SHOWERS. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT.
.SATURDAY NIGHT...NORTHEAST WINDS TO 30 KT BECOMING EAST. RAIN
SHOWERS. WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT BUILDING TO 5 TO
8 FT OCCASIONALLY TO 10 FT.
.SUNDAY...EAST WINDS TO 30 KT. RAIN SHOWERS WITH A CHANCE OF
THUNDERSTORMS. WAVES 5 TO 8 FT OCCASIONALLY TO 10 FT.
.MONDAY...SOUTHWEST WINDS TO 30 KT. CHANCE OF RAIN SHOWERS. WAVES
4 TO 7 FT OCCASIONALLY TO 9 FT.

$$
LMZ761-270930-
MAFOR 2703/
MICHIGAN NORTH 11410 11416 11816 11726 12536 11540 11530. CHANCE
OF RAIN SHOWERS THURSDAY EVENING. WAVES 2 TO 4 FT OVERNIGHT
BUILDING TO 4 TO 6 FT OCCASIONALLY TO 8 FT THURSDAY. WAVES
SUBSIDING TO 3 TO 5 FT OCCASIONALLY TO 7 FT THURSDAY EVENING.

MICHIGAN SOUTH 11416 11426 11420 11536 11630 11540 11530 11520.
CHANCE OF SHOWERS THURSDAY. WAVES 2 TO 4 FT OVERNIGHT. WAVES 3 TO
5 FT OCCASIONALLY TO 7 FT BUILDING TO 4 TO 6 FT OCCASIONALLY TO 8
FT THURSDAY. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT SUBSIDING TO 2
TO 4 FT THURSDAY EVENING.

$$

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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