Great Lakes Forecast
Issued by NWS

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000
FZUS63 KLOT 221941
GLFLM

OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
241 PM CDT MON MAY 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...HIGH PRESSURE OF 30.1 INCHES ACROSS THE OHIO VALLEY
WILL SHIFT TO THE NORTHEAST THROUGH TONIGHT WILL LOW PRESSURE OF
29.7 INCHES NORTH OF LAKE SUPERIOR SHIFTS INTO WESTERN QUEBEC. A
COLD FRONT TRAILING FROM THIS LOW WILL CROSS NORTHERN LAKE
MICHIGAN THIS EVENING. ANOTHER WEAK LOW AROUND 29.8 INCHES ACROSS
THE CORN BELT WILL SHIFT ACROSS THE MISSISSIPPI VALLEY THIS
EVENING AND MEANDER ACROSS THE WESTERN AND CENTRAL GREAT LAKES
THROUGH MID WEEK WHILE SLOWLY DEEPENING TO AROUND 29.4 INCHES.
WEAK HIGH PRESSURE RIDGING AROUND 29.9 INCHES WILL BE OVER THE
GREAT LAKES ON FRIDAY.

LMZ261-362-364-366-563-565-230315-
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-
241 PM CDT MON MAY 22 2017

TWO RIVERS WI TO MANISTEE MI NORTH...

.TONIGHT...SOUTHWEST WINDS 10 TO 20 KT BECOMING SOUTH 5 TO 10 KT
OVERNIGHT AND VARIABLE LATE. SLIGHT CHANCE OF SHOWERS THIS
EVENING. WAVES 2 TO 4 FT SUBSIDING TO 1 TO 3 FT LATE.
.TUESDAY...NORTHEAST WINDS 10 TO 15 KT. SLIGHT CHANCE OF SHOWERS
IN THE MORNING...THEN CHANCE OF RAIN SHOWERS IN THE AFTERNOON.
WAVES 1 TO 2 FT.
.TUESDAY NIGHT...NORTHEAST WINDS 15 TO 25 KT. CHANCE OF SHOWERS.
WAVES 1 TO 3 FT.
.WEDNESDAY...NORTHEAST WINDS 15 TO 25 KT. CHANCE OF SHOWERS IN
THE MORNING. WAVES 2 TO 4 FT.
.WEDNESDAY NIGHT...NORTHEAST WINDS 15 TO 25 KT. WAVES 2 TO 4 FT.
.THURSDAY...NORTHEAST WINDS 10 TO 20 KT. WAVES 1 TO 3 FT.
.THURSDAY NIGHT...NORTH WINDS 10 TO 15 KT. WAVES 1 TO 2 FT.
.FRIDAY...WEST WINDS 5 TO 10 KT BECOMING SOUTHWEST 10 TO 15 KT.
WAVES 1 FT OR LESS.
.SATURDAY...SOUTHWEST WINDS 10 TO 15 KT. WAVES 2 FT OR LESS.

$$

LMZ080-567-669-671-673-675-777-779-868-870-872-874-876-878-230315-
LAKE MICHIGAN FROM MICHIGAN CITY IN TO ST. JOSEPH MI 5 NM
OFFSHORE TO MID LAKE-
LAKE MICHIGAN FROM TWO RIVERS TO SHEBOYGAN WI 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 PENTWATER TO MANISTEE MI 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-
241 PM CDT MON MAY 22 2017

TWO RIVERS WI TO MANISTEE MI SOUTH...

.TONIGHT...SOUTHWEST WINDS 15 TO 25 KT DIMINISHING TO 10 TO 15 KT
LATE. CHANCE OF SHOWERS AND SLIGHT CHANCE OF THUNDERSTORMS THIS
EVENING...THEN SLIGHT CHANCE OF RAIN SHOWERS OVERNIGHT. WAVES 2 TO
4 FT.
.TUESDAY...SOUTHEAST WINDS 5 TO 10 KT BECOMING EAST. CHANCE OF
SHOWERS. WAVES 1 TO 3 FT SUBSIDING TO 1 TO 2 FT LATE.
.TUESDAY NIGHT...NORTHEAST WINDS 15 TO 25 KT. CHANCE OF SHOWERS.
WAVES 1 TO 3 FT.
.WEDNESDAY...NORTHEAST WINDS TO 30 KT. CHANCE OF SHOWERS. WAVES 3
TO 5 FT OCCASIONALLY TO 7 FT.
.WEDNESDAY NIGHT...NORTH WINDS 15 TO 25 KT. CHANCE OF SHOWERS.
WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT.
.THURSDAY...NORTH WINDS 15 TO 25 KT. WAVES 3 TO 5 FT OCCASIONALLY
TO 7 FT.
.THURSDAY NIGHT...NORTHWEST WINDS 10 TO 15 KT. WAVES 1 TO 3 FT.
.FRIDAY...WEST WINDS 5 TO 10 KT BACKING TO SOUTH 10 TO 15 KT.
WAVES 1 TO 2 FT.
.SATURDAY...SOUTH WINDS 10 TO 15 KT. WAVES 1 FT OR LESS.

$$

LMZ761-230315-
MAFOR 2221/
MICHIGAN NORTH 12520 12510 11400 13110. CHANCE OF SHOWERS
TUESDAY. WAVES 2 TO 4 FT TONIGHT SUBSIDING TO 1 TO 3 FT TUESDAY.

MICHIGAN SOUTH 12530 12520 11510 12400 11300. CHANCE OF SHOWERS
EARLY THIS EVENING AND TUESDAY. WAVES 2 TO 4 FT SUBSIDING TO 1 TO
3 FT LATE TONIGHT AND TUESDAY.

$$

KMD

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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