538
FZUS63 KLOT 191705
GLFLM
OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
856 AM CDT WED SEP 19 2018
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 30.1 INCHES OVER ONTARIO AND THE
NORTHERN GREAT LAKES WILL GRADUALLY SHIFT NORTHEAST TONIGHT. LOW
PRESSURE OF 29.5 INCHES WILL DEVELOP OVER THE CENTRAL PLAINS
TONIGHT AND THEN LIFT NORTHEAST TO THE UPPER MISSISSIPPI VALLEY
THURSDAY EVENING. THE LOW WILL TRACK ACROSS THE UPPER GREAT LAKES
THURSDAY NIGHT WHILE DRAGGING A STRONG COLD FRONT ACROSS THE LAKE.
HIGH PRESSURE OF 30.4 INCHES WILL SPREAD ACROSS THE UPPER
MISSISSIPPI VALLEY AND GREAT LAKES REGION SATURDAY.
LMZ261-362-364-366-563-565-567-868-192030-
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-
856 AM CDT WED SEP 19 2018
SHEBOYGAN WI TO PENTWATER MI NORTH...
...GALE WATCH IN EFFECT FROM THURSDAY EVENING THROUGH FRIDAY
EVENING...
REST OF TODAY
NORTHEAST WINDS 10 TO 15 KT. CHANCE OF SHOWERS
AND THUNDERSTORMS THIS AFTERNOON. WAVES 1 TO 3 FT.
TONIGHT
EAST WINDS 10 TO 15 KT INCREASING TO 10 TO 20 KT.
CHANCE OF SHOWERS IN THE EVENING, THEN SHOWERS LIKELY OVERNIGHT.
WAVES 1 TO 3 FT.
THURSDAY
SOUTHEAST WINDS 10 TO 20 KT INCREASING TO 30 KT.
SHOWERS WITH A CHANCE OF THUNDERSTORMS IN THE MORNING, THEN
CHANCE OF SHOWERS AND THUNDERSTORMS IN THE AFTERNOON. WAVES 3 TO
5 FT.
THURSDAY NIGHT
SOUTH WINDS TO 30 KT INCREASING TO GALES TO 35
KT DURING THE EVENING, THEN BECOMING SOUTHWEST GALES TO 40 KT
OVERNIGHT. CHANCE OF SHOWERS AND THUNDERSTORMS. WAVES 5 TO 8 FT
OCCASIONALLY TO 10 FT BUILDING TO 10 TO 14 FT OCCASIONALLY TO 18
FT.
FRIDAY
WEST GALES TO 40 KT BECOMING NORTHWEST GALES TO 35 KT.
WAVES 10 TO 14 FT OCCASIONALLY TO 18 FT SUBSIDING TO 6 TO 9 FT
OCCASIONALLY TO 12 FT.
FRIDAY NIGHT
NORTH WINDS TO 30 KT DIMINISHING TO 10 TO 20 KT.
WAVES 5 TO 8 FT OCCASIONALLY TO 10 FT.
SATURDAY
SOUTHEAST WINDS 10 TO 15 KT VEERING TO SOUTHWEST
10 TO 20 KT. WAVES 2 TO 4 FT SUBSIDING TO 1 TO 3 FT.
SUNDAY
NORTHEAST WINDS 10 TO 15 KT BECOMING EAST 10 TO 20 KT.
WAVES 1 TO 3 FT.
LMZ080-669-671-673-675-777-779-870-872-874-876-878-192030-
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-
856 AM CDT WED SEP 19 2018
SHEBOYGAN WI TO PENTWATER MI SOUTH...
REST OF TODAY
NORTHEAST WINDS 10 TO 20 KT. SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS THIS AFTERNOON. WAVES 2 TO 4 FT.
TONIGHT
EAST WINDS 10 TO 20 KT BECOMING SOUTHEAST. CHANCE OF
SHOWERS AND THUNDERSTORMS IN THE EVENING, THEN SHOWERS AND
THUNDERSTORMS LIKELY OVERNIGHT. WAVES 2 TO 4 FT.
THURSDAY
SOUTHEAST WINDS 10 TO 20 KT BECOMING SOUTH. CHANCE OF
SHOWERS AND THUNDERSTORMS IN THE MORNING. WAVES 2 TO 4 FT BUILDING
TO 3 TO 5 FT.
THURSDAY NIGHT
SOUTH WINDS TO 30 KT BECOMING SOUTHWEST. A FEW
GALE FORCE GUSTS TO 35KT POSSIBLE. WAVES 5 TO 8 FT OCCASIONALLY
TO 10 FT BUILDING TO 7 TO 10 FT OCCASIONALLY TO 13 FT.
FRIDAY
WEST WINDS TO 30 KT BECOMING NORTHWEST. GALES TO 35 KT
POSSIBLE. WAVES 6 TO 9 FT OCCASIONALLY TO 12 FT.
FRIDAY NIGHT
NORTH WINDS TO 30 KT BECOMING NORTHEAST 10 TO
20 KT. WAVES 5 TO 8 FT OCCASIONALLY TO 10 FT SUBSIDING TO 4 TO
7 FT OCCASIONALLY TO 9 FT.
SATURDAY
EAST WINDS 10 TO 20 KT BECOMING SOUTHEAST 5 TO 10 KT.
WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT SUBSIDING TO 2 TO 4 FT.
SUNDAY
EAST WINDS 10 TO 15 KT. WAVES 1 FT OR LESS.
LMZ761-192030-
MAFOR 1915/
MICHIGAN NORTH 13110 12210 12219 11329. CHANCE OF SHOWERS AND
THUNDERSTORMS THIS AFTERNOON. WAVES 1 TO 3 FT TODAY AND TONIGHT.
WAVES 3 TO 5 FT THURSDAY MORNING.
MICHIGAN SOUTH 13120 12220 13329. CHANCE OF SHOWERS AND
THUNDERSTORMS THIS EVENING. WAVES 2 TO 4 FT.
THE GALE WATCH FOR NORTHERN PORTIONS OF LAKE MICHIGAN WILL BE
REISSUED BY NWS MILWAUKEE THIS MORNING.
THIS WILL BE THE FINAL OPEN WATERS FORECAST FOR LAKE MICHIGAN
ISSUED BY NWS CHICAGO. UPDATES TO THIS FORECAST AS WELL AS ROUTINE
FORECASTS WILL BE TRANSFERRED TO NWS MILWAUKEE THIS MORNING.
FOR ADDITIONAL INFORMATION:
HTTPS://WWW.WEATHER.GOV/MEDIA/NOTIFICATION/PDFS/SCN18-64LAKE_MICHIGAN_TRANSFER.PDF
OR CONTACT: TIM HALBACH AT TIMOTHY.J.HALBACH@NOAA.GOV
OR ED FENELON AT EDWARD.FENELON@NOAA.GOV
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