Great Lakes Forecast
Issued by NWS

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary Off
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 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

770
FZUS63 KLOT 231945
GLFLM

OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
245 PM CDT TUE AUG 23 2016

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 HEIGHT OF THE HIGHEST 1/3 OF THE WAVES...ALONG
WITH THE AVERAGE HEIGHT OF THE HIGHEST 10 PERCENT OF THE WAVES
WHICH WILL OCCASIONALLY BE ENCOUNTERED.

.SYNOPSIS...HIGH PRESSURE AROUND 30.3 INCHES CENTERED OVER THE MID
ATLANTIC COAST WILL CONTINUE TO VERY SLOWLY SLIDE EAST OFF THE
COAST WHILE RIDGING EXTENDS SOUTHWEST THROUGH THE LOWER
MISSISSIPPI VALLEY. MEANWHILE...LOW PRESSURE OF 29.5 INCHES OVER
THE DAKOTAS WILL GRADUALLY TRACK TO WESTERN QUEBEC BY THURSDAY
MORNING. AN ASSOCIATED COLD FRONT WILL THEN SWEEP ACROSS LAKE
MICHIGAN WEDNESDAY NIGHT. ANOTHER HIGH AROUND 30.2 INCHES IS THEN
FORECAST TO BUILD OVER THE WESTERN LAKES REGION BY FRIDAY EVENING.

LMZ261-362-364-366-563-565-567-669-671-868-870-872-240315-
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 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 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-
245 PM CDT TUE AUG 23 2016

NORTH POINT LIGHT WI TO GRAND HAVEN MI NORTH...

.TONIGHT...SOUTH WINDS TO 30 KT DIMINISHING TO 15 TO 25 KT.
CHANCE OF SHOWERS AND SLIGHT CHANCE OF THUNDERSTORMS OVERNIGHT.
WAVES 6 TO 9 FT OCCASIONALLY TO 11 FT.
.WEDNESDAY...SOUTH WINDS 15 TO 25 KT BECOMING SOUTHWEST. SHOWERS
LIKELY WITH SLIGHT CHANCE OF THUNDERSTORMS IN THE MORNING...THEN
SHOWERS LIKELY WITH A CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
WAVES SUBSIDING TO 4 TO 7 FT OCCASIONALLY TO 9 FT.
.WEDNESDAY NIGHT...SOUTHWEST WINDS 15 TO 25 KT DIMINISHING TO
10 TO 20 KT LATE IN THE EVENING...THEN BECOMING WEST 10 TO 15 KT
OVERNIGHT. CHANCE OF SHOWERS IN THE EVENING. WAVES 4 TO 6 FT
OCCASIONALLY TO 8 FT SUBSIDING TO 1 TO 3 FT.
.THURSDAY...WEST WINDS 10 TO 15 KT. WAVES 1 TO 3 FT.
.THURSDAY NIGHT...WEST WINDS 10 TO 20 KT BECOMING NORTHWEST 15 TO
25 KT. WAVES 2 TO 4 FT.
.FRIDAY...NORTHWEST WINDS 10 TO 20 KT DIMINISHING TO 10 TO 15 KT.
WAVES 2 TO 4 FT.
.FRIDAY NIGHT...NORTHEAST WINDS 5 TO 10 KT BECOMING EAST. WAVES
1 TO 2 FT.
.SATURDAY...SOUTHEAST WINDS 10 TO 15 KT. WAVES 1 TO 2 FT.
.SUNDAY...SOUTHWEST WINDS 10 TO 15 KT. CHANCE OF SHOWERS AND
THUNDERSTORMS. WAVES 1 TO 2 FT.

$$

LMZ080-673-675-777-779-874-876-878-240315-
LAKE MICHIGAN FROM MICHIGAN CITY IN TO ST. JOSEPH MI 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 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-
245 PM CDT TUE AUG 23 2016

NORTH POINT LIGHT WI TO GRAND HAVEN MI SOUTH...

.TONIGHT...SOUTH WINDS 15 TO 25 KT. CHANCE OF SHOWERS AND SLIGHT
CHANCE OF THUNDERSTORMS OVERNIGHT. WAVES 4 TO 7 FT OCCASIONALLY
TO 9 FT.
.WEDNESDAY...SOUTH WINDS 15 TO 25 KT BECOMING SOUTHWEST. SHOWERS
AND THUNDERSTORMS LIKELY. WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT.
.WEDNESDAY NIGHT...SOUTHWEST WINDS 10 TO 20 KT BECOMING WEST
10 TO 15 KT. SHOWERS AND THUNDERSTORMS LIKELY IN THE EVENING...
THEN CHANCE OF SHOWERS AND THUNDERSTORMS OVERNIGHT. WAVES 3 TO
5 FT OCCASIONALLY TO 7 FT SUBSIDING TO 1 TO 3 FT.
.THURSDAY...WEST WINDS 10 TO 20 KT DIMINISHING TO 10 TO 15 KT.
WAVES 1 TO 2 FT.
.THURSDAY NIGHT...WEST WINDS 10 TO 20 KT BECOMING NORTHWEST.
WAVES 2 TO 4 FT.
.FRIDAY...NORTHWEST WINDS 10 TO 20 KT DIMINISHING TO 10 TO 15 KT.
WAVES 2 TO 4 FT.
.FRIDAY NIGHT...NORTHEAST WINDS 5 TO 10 KT BECOMING EAST. WAVES
1 TO 2 FT.
.SATURDAY...SOUTHEAST WINDS 10 TO 15 KT. WAVES 1 TO 2 FT.
.SUNDAY...SOUTH WINDS 10 TO 15 KT. CHANCE OF SHOWERS AND
THUNDERSTORMS. WAVES 1 TO 2 FT.

$$

LMZ761-240315-
MAFOR 2321/
MICHIGAN NORTH 13440 13430 12436. CHANCE OF SHOWERS LATE...THEN
CHANCE OF THUNDERSTORMS WEDNESDAY. WAVES 6 TO 9 FT OCCASIONALLY
TO 11 FT TONIGHT...SUBSIDING TO 4 TO 7 FT OCCASIONALLY TO 9 FT
WEDNESDAY AFTERNOON.

MICHIGAN SOUTH 15430 12439. CHANCE OF SHOWERS LATE THIS EVENING.
WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT.

$$

EXPERIMENTAL MODERNIZED OPEN LAKE FORECAST IS AVAILABLE ONLINE AT
WEATHER.GOV/LOT/GLFTABLE (ALL LOWER CASE)

GRAPHICAL MARINE FORECASTS ARE AVAILABLE ONLINE AT
WEATHER.GOV/GREATLAKES (ALL LOWER CASE)



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