Great Lakes Forecast
Issued by NWS

Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
000
FZUS63 KLOT 200130
GLFLM

OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
830 PM CDT FRI MAY 19 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 CENTERED OVER THE
ONTARIO QUEBEC BORDER WILL SLOWLY SHIFT EAST OVER THE COMING DAYS.
LOW PRESSURE OF 29.7 INCHES OVER THE SOUTHERN HIGH PLAINS WILL
TRACK INTO IOWA BY SATURDAY AFTERNOON. THE LOW IS EXPECTED TO THEN
LIFT INTO ONTARIO ON SUNDAY...PUSHING A COLD FRONT ACROSS THE
LAKE SATURDAY NIGHT. BEHIND THE FRONT...SOUTHWESTERLY FLOW THEN
PERSISTS ACROSS THE LAKE INTO MONDAY. ANOTHER LOW AROUND 29.6
INCHES WILL APPROACH LAKE MICHIGAN ON TUESDAY AND WILL SEND A COLD
FRONT ACROSS THE LAKE.

LMZ261-362-364-366-563-565-567-868-200930-
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-
830 PM CDT FRI MAY 19 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TONIGHT...NORTHEAST WINDS 15 TO 25 KT BECOMING EAST.
WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT SUBSIDING TO 3 TO 5 FT
OCCASIONALLY TO 7 FT.
.SATURDAY...EAST WINDS TO 30 KT. CHANCE OF SHOWERS IN THE
MORNING...THEN SHOWERS WITH CHANCE OF THUNDERSTORMS IN THE
AFTERNOON. WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT.
.SATURDAY NIGHT...EAST WINDS TO 30 KT BECOMING SOUTHEAST. SHOWERS
WITH A CHANCE OF THUNDERSTORMS IN THE EVENING...THEN SHOWERS
LIKELY OVERNIGHT. WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT SUBSIDING
TO 3 TO 5 FT OCCASIONALLY TO 7 FT OVERNIGHT.
.SUNDAY...SOUTH WINDS TO 30 KT BECOMING SOUTHWEST 15 TO 25 KT.
CHANCE OF RAIN SHOWERS IN THE MORNING. WAVES 2 TO 4 FT.
.SUNDAY NIGHT...SOUTHWEST WINDS 15 TO 25 KT. WAVES 2 TO 4 FT.
.MONDAY...SOUTHWEST WINDS 10 TO 20 KT. WAVES 2 TO 4 FT.
.MONDAY NIGHT...WEST WINDS 10 TO 15 KT BECOMING NORTHWEST. WAVES
1 TO 3 FT.
.TUESDAY...NORTHEAST WINDS 10 TO 15 KT BECOMING NORTH 15 TO 25 KT
IN THE AFTERNOON. CHANCE OF SHOWERS. WAVES 1 TO 3 FT BUILDING TO
3 TO 5 FT OCCASIONALLY TO 7 FT IN THE AFTERNOON.
.WEDNESDAY...NORTH WINDS TO 30 KT. CHANCE OF SHOWERS. WAVES 4 TO
7 FT OCCASIONALLY TO 9 FT.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-200930-
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-
830 PM CDT FRI MAY 19 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TONIGHT...NORTHEAST WINDS 15 TO 25 KT BECOMING EAST.
WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT.
.SATURDAY...EAST WINDS 15 TO 25 KT. SHOWERS LIKELY WITH A CHANCE
OF THUNDERSTORMS. WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT.
.SATURDAY NIGHT...SOUTHEAST WINDS 15 TO 25 KT BECOMING SOUTH.
SHOWERS LIKELY WITH A CHANCE OF THUNDERSTORMS IN THE
EVENING...THEN CHANCE OF SHOWERS OVERNIGHT. WAVES 4 TO 6 FT
OCCASIONALLY TO 8 FT SUBSIDING TO 3 TO 5 FT OCCASIONALLY TO 7 FT
OVERNIGHT.
.SUNDAY...SOUTHWEST WINDS 10 TO 20 KT. WAVES 2 TO 4 FT.
.SUNDAY NIGHT...WEST WINDS 15 TO 25 KT. WAVES 2 TO 4 FT.
.MONDAY...SOUTHWEST WINDS 15 TO 25 KT. WAVES 2 TO 4 FT.
.MONDAY NIGHT...SOUTHWEST WINDS 10 TO 20 KT. CHANCE OF SHOWERS.
WAVES 1 TO 3 FT.
.TUESDAY...SOUTHEAST WINDS 10 TO 20 KT BECOMING EAST 15 TO 25 KT.
RAIN SHOWERS LIKELY. WAVES 1 TO 2 FT BUILDING TO 2 TO 4 FT IN THE
AFTERNOON.
.WEDNESDAY...NORTH WINDS TO 30 KT. CHANCE OF SHOWERS. WAVES 6 TO
9 FT OCCASIONALLY TO 11 FT.

$$
LMZ761-200930-
MAFOR 2003/
MICHIGAN NORTH 12130 11230 12240 13246. CHANCE OF SHOWERS
LATE...THEN CHANCE OF THUNDERSTORMS SATURDAY. CHANCE OF
THUNDERSTORMS SATURDAY EVENING. WAVES 4 TO 6 FT OCCASIONALLY TO 8
FT SUBSIDING TO 3 TO 5 FT OCCASIONALLY TO 7 FT OVERNIGHT. WAVES 4
TO 7 FT OCCASIONALLY TO 9 FT SATURDAY AND SATURDAY EVENING.

MICHIGAN SOUTH 11130 13230 13236 11336. CHANCE OF THUNDERSTORMS
SATURDAY AND SATURDAY EVENING. WAVES 4 TO 6 FT OCCASIONALLY TO 8
FT TONIGHT. WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT SATURDAY. WAVES
4 TO 6 FT OCCASIONALLY TO 8 FT SATURDAY EVENING.

$$


JEE

EXPERIMENTAL MODERNIZED OPEN LAKE FORECAST IS AVAILABLE ONLINE AT
WEATHER.GOV/LOT/GLFTABLE

GRAPHICAL MARINE FORECASTS ARE AVAILABLE ONLINE AT:
WEATHER.GOV/GREATLAKES



USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.