Great Lakes Forecast
Issued by NWS

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000
FZUS63 KLOT 170758
GLFLM

OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
258 AM CDT FRI MAR 17 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 30.4 INCHES ACROSS THE EASTERN GREAT
LAKES TO SOUTHEAST U.S. WILL SHIFT EAST TODAY. LOW PRESSURE OF
29.7 INCHES OVER SOUTHERN MANITOBA WILL TRACK TO LAKE SUPERIOR BY
THIS EVENING...WHILE WEAKENING TO 29.8 INCHES. THE LOW WILL
AVERAGE 29.9 INCHES AS IT DROPS SOUTHEAST OVER THE GREAT LAKES
LATE TONIGHT. HIGH PRESSURE OF 30.4 INCHES WILL SPREAD ACROSS THE
WESTERN LAKES AGAIN SATURDAY NIGHT INTO EARLY SUNDAY. A LARGE
SURFACE LOW WILL DEEPEN TO AROUND 28.9 INCHES AS IT REACHES HUDSON
BAY SUNDAY NIGHT AND ITS COLD FRONT WILL PASS OVER THE LAKE
MONDAY.

LMZ261-362-364-366-563-565-567-868-171530-
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-
258 AM CDT FRI MAR 17 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TODAY...SOUTHEAST WINDS 15 TO 25 KT INCREASING TO 30 KT THIS
MORNING...THEN BECOMING SOUTH 15 TO 25 KT THIS AFTERNOON. RAIN
LIKELY WITH A CHANCE OF SNOW THIS MORNING...THEN RAIN AND SNOW
THIS AFTERNOON. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT BUILDING TO
5 TO 8 FT OCCASIONALLY TO 10 FT.
.TONIGHT...SOUTH WINDS 10 TO 20 KT BECOMING SOUTHWEST 15 TO 25 KT
LATE IN THE EVENING...THEN BECOMING NORTHWEST TO 30 KT LATE.
CHANCE OF RAIN OR SNOW SHOWERS IN THE EVENING...THEN CHANCE OF
SNOW SHOWERS OVERNIGHT. WAVES 3 TO 6 FT OCCASIONALLY TO 8 FT.
.SATURDAY...NORTHWEST WINDS TO 30 KT BECOMING NORTH 15 TO 25 KT.
WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT SUBSIDING TO 3 TO 5 FT
OCCASIONALLY TO 7 FT.
.SATURDAY NIGHT...NORTH WINDS 10 TO 20 KT. WAVES SUBSIDING TO 1
TO 3 FT.
.SUNDAY...SOUTH WINDS 10 TO 15 KT INCREASING TO 15 TO 25 KT IN
THE AFTERNOON. WAVES BUILDING TO 3 TO 5 FT OCCASIONALLY TO 7 FT.
.SUNDAY NIGHT...SOUTH WINDS TO 30 KT BECOMING SOUTHWEST 15 TO
25 KT. CHANCE OF RAIN SHOWERS. WAVES 3 TO 6 FT OCCASIONALLY TO 8
FT.
.MONDAY...WEST WINDS 10 TO 20 KT BECOMING NORTHWEST. CHANCE OF
RAIN SHOWERS. WAVES 2 TO 4 FT.
.TUESDAY...NORTHWEST WINDS 15 TO 25 KT BECOMING NORTH. WAVES 3 TO
5 FT OCCASIONALLY TO 7 FT.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-171530-
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-
258 AM CDT FRI MAR 17 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TODAY...SOUTHEAST WINDS 15 TO 25 KT INCREASING TO 30 KT THIS
MORNING...THEN BECOMING SOUTH 15 TO 25 KT THIS AFTERNOON. RAIN
LIKELY WITH SNOW THIS MORNING...THEN RAIN LIKELY THIS AFTERNOON.
WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT BUILDING TO 5 TO 8 FT
OCCASIONALLY TO 10 FT.
.TONIGHT...SOUTHWEST WINDS 10 TO 20 KT BECOMING WEST 15 TO 25 KT
LATE IN THE EVENING...THEN INCREASING TO 30 KT AFTER MIDNIGHT AND
BECOMING NORTHWEST LATE. SLIGHT CHANCE OF RAIN OR SNOW SHOWERS IN
THE EVENING...THEN SLIGHT CHANCE OF SNOW SHOWERS OVERNIGHT. WAVES
4 TO 6 FT OCCASIONALLY TO 8 FT.
.SATURDAY...NORTHWEST WINDS TO 30 KT DIMINISHING TO 15 TO 25 KT.
WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT.
.SATURDAY NIGHT...NORTH WINDS 10 TO 20 KT. WAVES SUBSIDING TO 2
TO 4 FT.
.SUNDAY...SOUTHEAST WINDS 10 TO 15 KT BECOMING SOUTH 15 TO 25 KT
IN THE AFTERNOON. WAVES 2 TO 4 FT.
.SUNDAY NIGHT...SOUTH WINDS TO 30 KT DIMINISHING TO 15 TO 25 KT.
RAIN SHOWERS LIKELY. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT.
.MONDAY...WEST WINDS 10 TO 20 KT VEERING TO NORTH. CHANCE OF RAIN
SHOWERS. WAVES 2 TO 4 FT.
.TUESDAY...NORTHWEST WINDS 20 TO 25 KT BECOMING NORTH 10 TO 20
KT. WAVES 3 TO 6 FT OCCASIONALLY TO 8 FT.

$$

LMZ761-171530-
MAFOR 1709/
MICHIGAN NORTH 11330 11340 12347 11437 11420 11530 11630. CHANCE
OF SNOW EARLY THIS MORNING. CHANCE OF SNOW SHOWERS TONIGHT. WAVES
3 TO 5 FT OCCASIONALLY TO 7 FT BUILDING TO 5 TO 8 FT OCCASIONALLY
TO 10 FT TODAY. WAVES 3 TO 6 FT OCCASIONALLY TO 8 FT TONIGHT.

MICHIGAN SOUTH 11330 11347 12446 11430 11520 12630. CHANCE OF
RAIN AND SNOW EARLY THIS MORNING. WAVES 3 TO 5 FT OCCASIONALLY TO
7 FT BUILDING TO 5 TO 8 FT OCCASIONALLY TO 10 FT TODAY. WAVES 4
TO 6 FT OCCASIONALLY TO 8 FT TONIGHT.

$$


KJB

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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