Great Lakes Forecast
Issued by NWS

Home | Current Version | Previous Version | Graphics & Text | 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
000
FZUS63 KLOT 190807
GLFLM

OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
307 AM CDT WED APR 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...LOW PRESSURE OF 29.8 INCHES OVER LAKE SUPERIOR...WILL
MOVE ACROSS SOUTHERN QUEBEC THIS EVENING AS IT SLOWLY WEAKENS TO
30.0 INCHES. A TRAILING COLD FRONT WILL MOVE SOUTH ACROSS THE
LAKE OVERNIGHT INTO WEDNESDAY MORNING AND THEN BECOME STATIONARY
JUST SOUTH OF THE LAKE TONIGHT. HIGH PRESSURE OF 30.4 INCHES WILL
BUILD ACROSS CENTRAL CANADA OVERNIGHT AND WEDNESDAY WHILE NEW LOW
PRESSURE OF 29.6 INCHES DEVELOPS OVER THE CENTRAL PLAINS. THIS
LOW WILL PASS OVER CENTRAL OR NORTHERN LAKE MICHIGAN THURSDAY...
DRAGGING ANOTHER COLD FRONT ACROSS THE LAKE. HIGH PRESSURE OF
30.3 INCHES WILL SPREAD ACROSS THE NORTHERN AND CENTRAL PLAINS
THURSDAY AND THURSDAY NIGHT AND THEN BUILD ACROSS THE UPPER
MISSISSIPPI VALLEY AND WESTERN GREAT LAKES FRIDAY.

LMZ261-362-364-366-563-565-191530-
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-
307 AM CDT WED APR 19 2017

TWO RIVERS WI TO MANISTEE MI NORTH...

...GALE WARNING IN EFFECT FROM LATE TONIGHT THROUGH THURSDAY
MORNING...

.TODAY...NORTHWEST WINDS 15 TO 25 KT BECOMING NORTH. WAVES 3 TO 5
FT OCCASIONALLY TO 7 FT.
.TONIGHT...NORTH WINDS TO 30 KT BECOMING EAST GALES TO 35 KT.
CHANCE OF RAIN SHOWERS AND THUNDERSTORMS IN THE EVENING...THEN
RAIN SHOWERS AND THUNDERSTORMS OVERNIGHT. WAVES 4 TO 6 FT
OCCASIONALLY TO 8 FT BUILDING TO 5 TO 8 FT OCCASIONALLY TO 10 FT.
.THURSDAY...EAST GALES TO 35 KT VEERING TO SOUTHWEST TO 30 KT.
RAIN SHOWERS LIKELY IN THE MORNING...THEN CHANCE OF RAIN SHOWERS
IN THE AFTERNOON. WAVES 6 TO 9 FT OCCASIONALLY TO 11 FT SUBSIDING
TO 4 TO 6 FT OCCASIONALLY TO 8 FT.
.THURSDAY NIGHT...WEST WINDS TO 30 KT BECOMING NORTHWEST. CHANCE
OF RAIN SHOWERS IN THE EVENING. WAVES 4 TO 7 FT OCCASIONALLY TO
9 FT.
.FRIDAY...NORTHWEST WINDS TO 30 KT BECOMING NORTH 10 TO 20 KT IN
THE AFTERNOON. WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT SUBSIDING TO
3 TO 5 FT OCCASIONALLY TO 7 FT.
.FRIDAY NIGHT...NORTH WINDS 10 TO 20 KT. WAVES 2 TO 4 FT.
.SATURDAY...NORTH WINDS 10 TO 20 KT. WAVES 2 TO 4 FT.
.SUNDAY...NORTHWEST WINDS 10 TO 20 KT BECOMING NORTH 15 TO 25 KT.
WAVES 2 TO 4 FT BUILDING TO 3 TO 5 FT OCCASIONALLY TO 7 FT.

$$

LMZ080-567-669-671-673-675-777-779-868-870-872-874-876-878-191530-
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-
307 AM CDT WED APR 19 2017

TWO RIVERS WI TO MANISTEE MI SOUTH...

.TODAY...NORTH WINDS 15 TO 25 KT INCREASING TO 30 KT. CHANCE OF
RAIN SHOWERS AND THUNDERSTORMS. WAVES 3 TO 5 FT OCCASIONALLY TO
7 FT.
.TONIGHT...NORTHEAST WINDS TO 30 KT VEERING TO SOUTH. CHANCE OF
RAIN SHOWERS AND THUNDERSTORMS IN THE EVENING...THEN RAIN SHOWERS
AND THUNDERSTORMS OVERNIGHT. WAVES 4 TO 6 FT OCCASIONALLY TO
8 FT.
.THURSDAY...SOUTH WINDS TO 30 KT BECOMING WEST. CHANCE OF RAIN
SHOWERS AND THUNDERSTORMS IN THE MORNING. WAVES 4 TO 6 FT
OCCASIONALLY TO 8 FT.
.THURSDAY NIGHT...WEST WINDS TO 30 KT BECOMING NORTHWEST. WAVES
4 TO 7 FT OCCASIONALLY TO 9 FT.
.FRIDAY...NORTHWEST WINDS 15 TO 25 KT BECOMING NORTH 10 TO 20 KT.
WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT SUBSIDING TO 3 TO 5 FT
OCCASIONALLY TO 7 FT.
.FRIDAY NIGHT...NORTH WINDS 10 TO 20 KT BECOMING NORTHEAST. WAVES
3 TO 5 FT OCCASIONALLY TO 7 FT.
.SATURDAY...NORTH WINDS 10 TO 20 KT. WAVES 3 TO 5 FT OCCASIONALLY
TO 7 FT.
.SUNDAY...NORTH WINDS 10 TO 20 KT INCREASING TO 15 TO 25 KT.
WAVES 2 TO 4 FT BUILDING TO 3 TO 5 FT OCCASIONALLY TO 7 FT.

$$

LMZ761-191530-
MAFOR 1909/
MICHIGAN NORTH...GALE WARNING IN EFFECT...11620 11730 12830 12840
11240 11259. CHANCE OF RAIN SHOWERS AND THUNDERSTORMS LATE
TONIGHT. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT TODAY. WAVES 4 TO 6
FT OCCASIONALLY TO 8 FT BUILDING TO 5 TO 8 FT OCCASIONALLY TO 10
FT TONIGHT.

MICHIGAN SOUTH 11630 12830 11840 11140 11240 11349 11449. CHANCE
OF RAIN SHOWERS AND THUNDERSTORMS EARLY THIS MORNING. CHANCE OF
RAIN SHOWERS AND THUNDERSTORMS LATE TONIGHT. WAVES 3 TO 5 FT
OCCASIONALLY TO 7 FT TODAY. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT.

$$

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.