Great Lakes Forecast
Issued by NWS

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000
FZUS63 KLOT 282000
GLFLM

OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
300 PM CDT FRI APR 28 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 29.3 INCHES OVER HUDSON BAY WILL
SHIFT NORTHEAST OVER NORTHERN QUEBEC TONIGHT AS A WEAK HIGH
PRESSURE OF 30.0 INCHES CURRENTLY OVER THE LAKE SHIFTS SOUTHEAST.
ANOTHER LARGER HIGH OF 30.5 INCHES WILL MOVE OVER ONTARIO SATURDAY
AND WEAKEN AS IT REACHES QUEBEC SUNDAY NIGHT. THE NEXT LOW OF
29.6 INCHES WILL FORM OVER THE SOUTHERN PLAINS SATURDAY
NIGHT...DEEPEN TO 29.3 INCHES AS IT REACHES IOWA SUNDAY
NIGHT...AND THEN PASS OVER THE NORTHERN END OF THE LAKE ON TUESDAY
MORNING. A COLD FRONT TRAILING FROM THE LOW PRESSURE WILL MOVE
ACROSS THE LAKE EARLY TUESDAY MORNING, WITH THE LOW WEAKENING TO
29.4 INCHES AS IT MOVES OVER QUEBEC TUESDAY NIGHT.

LMZ261-362-364-366-563-565-290315-
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-
300 PM CDT FRI APR 28 2017

TWO RIVERS WI TO MANISTEE MI NORTH...

...GALE WATCH IN EFFECT FROM SUNDAY AFTERNOON THROUGH MONDAY
MORNING...

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

$$

LMZ080-567-669-671-673-675-777-779-868-870-872-874-876-878-290315-
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-
300 PM CDT FRI APR 28 2017

TWO RIVERS WI TO MANISTEE MI SOUTH...

.TONIGHT...NORTHEAST WINDS 10 TO 15 KT INCREASING TO 30 KT
OVERNIGHT. CHANCE OF RAIN SHOWERS THIS EVENING...THEN SLIGHT
CHANCE OF RAIN SHOWERS OVERNIGHT. WAVES 1 TO 3 FT BUILDING TO 4 TO
6 FT OCCASIONALLY TO 8 FT.
.SATURDAY...NORTHEAST WINDS TO 30 KT. CHANCE OF RAIN SHOWERS.
WAVES 6 TO 9 FT OCCASIONALLY TO 11 FT.
.SATURDAY NIGHT...NORTHEAST WINDS TO 30 KT BECOMING EAST.
OCCASIONAL GALE FORCE GUSTS TO 35 KT POSSIBLE IN THE EVENING.
RAIN SHOWERS. WAVES 7 TO 10 FT OCCASIONALLY TO 13 FT.
.SUNDAY...EAST WINDS TO 30 KT BECOMING NORTHEAST. RAIN SHOWERS.
WAVES 5 TO 8 FT OCCASIONALLY TO 10 FT.
.SUNDAY NIGHT...EAST WINDS TO 30 KT BECOMING SOUTHEAST. RAIN
SHOWERS WITH ACHANCE OF THUNDERSTORMS IN THE EVENING...THEN RAIN
SHOWERS OVERNIGHT. WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT.
.MONDAY...SOUTH WINDS 15 TO 25 INCREASING TO 30 KT AND BECOMING
SOUTHWEST IN THE AFTERNOON. CHANCE OF SHOWERS. WAVES 4 TO 7 FT
OCCASIONALLY TO 9 FT.
.MONDAY NIGHT...SOUTHWEST GALES TO 35 KT. CHANCE OF RAIN SHOWERS.
WAVES 7 TO 10 FT OCCASIONALLY TO 13 FT.
.TUESDAY...WEST GALES TO 35 KT DIMINISHING TO 30 KT. WAVES 7 TO
10 FT OCCASIONALLY TO 13 FT.
.WEDNESDAY...NORTH WINDS 10 TO 20 KT DIMINISHING TO 10 TO 15 KT.
WAVES 1 TO 3 FT.

$$

LMZ761-290315-
MAFOR 2821/
MICHIGAN NORTH 10530 11520 11610 11810 14830 11840. CHANCE OF
RAIN SHOWERS EARLY THIS EVENING. WAVES 3 TO 5 FT OCCASIONALLY TO 7
FT BUILDING TO 4 TO 6 FT OCCASIONALLY TO 8 FT TONIGHT. WAVES 4 TO
7 FT OCCASIONALLY TO 9 FT SATURDAY.

MICHIGAN SOUTH 11110 11116 11120 11830 14140. CHANCE OF RAIN
SHOWERS THIS EVENING AND SATURDAY. WAVES 1 TO 3 FT BUILDING TO 4
TO 6 FT OCCASIONALLY TO 8 FT TONIGHT AND TO 6 TO 9 FT OCCASIONALLY
TO 11 FT SATURDAY.

$$


RC

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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