Great Lakes Forecast
Issued by NWS

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674
FZUS63 KLOT 300122
GLFLM

OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
822 PM CDT SAT APR 29 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 29.5 INCHES OVER SOUTHEASTERN OKLAHOMA
THIS EVENING WILL TRACK SLOWLY NORTH TO IOWA BY SUNDAY NIGHT,
DEEPENING TO 29.3 INCHES ALONG THE WAY. THE LOW WILL THEN CONTINUE
NORTHEAST INTO QUEBEC BY TUESDAY AFTERNOON. WEAK HIGH PRESSURE OF
30.0 INCHES WILL DEVELOP OVER THE CENTRAL PLAINS IN THE WAKE OF
THIS LOW, THEN STRENGTHEN TO 30.3 INCHES AS IT MOVES NORTHEAST TO
LAKE MICHIGAN BY WEDNESDAY AFTERNOON.

LMZ261-362-364-366-563-565-300930-
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-
822 PM CDT SAT APR 29 2017

TWO RIVERS WI TO MANISTEE MI NORTH...

...GALE WARNING IN EFFECT FROM SUNDAY AFTERNOON THROUGH LATE
SUNDAY NIGHT...

.REST OF TONIGHT...NORTH WINDS 15 TO 25 KT BECOMING NORTHEAST
WINDS TO 30 KT. SLIGHT CHANCE OF RAIN THIS EVENING...THEN CHANCE
OF RAIN SHOWERS OVERNIGHT. WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT.
.SUNDAY...EAST WINDS TO 30 KT BECOMING NORTHEAST GALES TO 35 KT.
RAIN LIKELY, ESPECIALLY IN THE AFTERNOON. WAVES 6 TO 9 FT
OCCASIONALLY TO 11 FT.
.SUNDAY NIGHT...EAST GALES TO 35 KT. RAIN. WAVES 6 TO 9 FT
OCCASIONALLY TO 11 FT.
.MONDAY...SOUTH WINDS TO 30 KT. SHOWERS LIKELY, MAINLY IN THE
AFTERNOON. WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT.
.MONDAY NIGHT...SOUTH WINDS TO 30 KT BECOMING SOUTHWEST. SHOWERS
LIKELY. WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT.
.TUESDAY...WEST WINDS TO 30 KT BECOMING NORTHWEST 15 TO 25 KT.
CHANCE OF RAIN SHOWERS IN THE MORNING. WAVES 4 TO 7 FT
OCCASIONALLY TO 9 FT SUBSIDING TO 4 TO 6 FT OCCASIONALLY TO 8 FT.
.TUESDAY NIGHT...NORTHWEST WINDS 15 TO 25 KT DIMINISHING TO 10 TO
20 KT. WAVES 2 TO 4 FT SUBSIDING TO 1 TO 3 FT.
.WEDNESDAY...NORTHWEST WINDS 10 TO 15 KT BACKING TO SOUTHWEST
5 TO 10 KT. WAVES 1 TO 2 FT.
.THURSDAY...SOUTHEAST WINDS 10 TO 15 KT BECOMING SOUTH 10 TO
20 KT. WAVES 1 TO 2 FT.

$$

LMZ080-567-669-671-673-675-777-779-868-870-872-874-876-878-300930-
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-
822 PM CDT SAT APR 29 2017

TWO RIVERS WI TO MANISTEE MI SOUTH...

...GALE WARNING IN EFFECT UNTIL 4 AM CDT SUNDAY...

.REST OF TONIGHT...NORTHEAST GALES TO 35 KT BECOMING EAST. RAIN
THIS EVENING...THEN RAIN SHOWERS LIKELY OVERNIGHT. WAVES 8 TO 12
FT OCCASIONALLY TO 15 FT.
.SUNDAY...EAST WINDS TO 30 KT. PERIODS OF SHOWERS. A CHANCE OF
THUNDERSTORMS IN THE AFTERNOON. WAVES 6 TO 9 FT OCCASIONALLY TO 11
FT SUBSIDING TO 4 TO 7 FT OCCASIONALLY TO 9 FT.
.SUNDAY NIGHT...EAST WINDS TO 30 KT VEERING TO SOUTH. PERIODS OF
SHOWERS. A CHANCE OF THUNDERSTORMS IN THE EVENING. WAVES 5 TO 8
FT OCCASIONALLY TO 10 FT.
.MONDAY...SOUTH WINDS TO 30 KT BECOMING SOUTHWEST GALES TO 35 KT.
CHANCE OF RAIN SHOWERS. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT
BUILDING TO 5 TO 8 FT OCCASIONALLY TO 10 FT.
.MONDAY NIGHT...SOUTHWEST GALES TO 40 KT BECOMING WEST GALES TO
35 KT. CHANCE OF RAIN SHOWERS. WAVES 6 TO 9 FT OCCASIONALLY TO
11 FT.
.TUESDAY...WEST GALES TO 35 KT DIMINISHING TO 30 KT. WAVES 6 TO
9 FT OCCASIONALLY TO 11 FT.
.TUESDAY NIGHT...NORTHWEST WINDS 15 TO 25 KT BECOMING NORTH 10 TO
15 KT OVERNIGHT. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT SUBSIDING
TO 1 TO 3 FT.
.WEDNESDAY...NORTH WINDS 10 TO 15 KT INCREASING TO 10 TO 20 KT.
WAVES 1 TO 2 FT.
.THURSDAY...NORTH WINDS 10 TO 20 KT. WAVES 1 TO 3 FT.

$$
LMZ761-300930-
MAFOR 3003/
MICHIGAN NORTH...GALE WARNING IN EFFECT...12140 12240 11140 11146
12156. SLIGHT CHANCE OF RAIN THIS EVENING...THEN CHANCE OF RAIN
SHOWERS OVERNIGHT. WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT OVERNIGHT
BUILDING TO 6 TO 9 FT OCCASIONALLY TO 11 FT SUNDAY AND SUNDAY
NIGHT.

MICHIGAN SOUTH...GALE WARNING IN EFFECT...11156 12256 11246 11240
12236 11246. A CHANCE OF THUNDERSTORMS SUNDAY AFTERNOON AND
EVENING. WAVES 8 TO 12 FT OCCASIONALLY TO 15 FT OVERNIGHT SUBSIDING
TO 6 TO 9 FT OCCASIONALLY TO 11 FT SUNDAY AND TO 5 TO 8 FT
OCCASIONALLY TO 10 FT SUNDAY 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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