Great Lakes Forecast
Issued by NWS

Home | 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 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
040
FZUS63 KLOT 130245
GLFLM

OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
845 PM CST THU JAN 12 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 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...LOW PRESSURE OF 29.8 INCHES NORTHEAST OF LAKE
SUPERIOR THIS EVENING...WILL QUICKLY MOVE INTO WESTERN QUEBEC
OVERNIGHT AS IT WEAKENS. STRONG ARCTIC HIGH PRESSURE OF 31.0
INCHES WILL BUILD INTO THE WESTERN GREAT LAKES BY MIDDAY FRIDAY
AND GRADUALLY WEAKEN TO 30.7 INCHES THROUGH SATURDAY. THE HIGH
WILL EVENTUALLY MOVE EAST OF THE LAKE ON MONDAY...AS LOW PRESSURE
OF 29.8 INCHES DEVELOPS ACROSS THE SOUTHERN PLAINS. THIS LOW WILL
MOVE TO NEAR OR OVER LAKE MICHIGAN BY TUESDAY NIGHT.

LMZ261-362-364-563-130900-
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 ROCK ISLAND PASSAGE TO STURGEON BAY WI-
845 PM CST THU JAN 12 2017

STURGEON BAY WI TO POINT BETSIE MI NORTH...

...GALE WARNING IN EFFECT UNTIL MIDNIGHT CST TONIGHT...

.REST OF TONIGHT...WEST GALES TO 40 KT BECOMING NORTHWEST TO 30
KT AFTER MIDNIGHT. SLIGHT CHANCE OF SNOW SHOWERS THIS EVENING.
FREEZING SPRAY. WAVES 6 TO 9 FT OCCASIONALLY TO 11 FT.
.FRIDAY...NORTHWEST WINDS 10 TO 20 KT DIMINISHING TO 5 TO 10 KT
BY LATE AFTERNOON. SLIGHT CHANCE OF SNOW SHOWERS IN THE MORNING.
WAVES 3 TO 6 FT OCCASIONALLY TO 8 FT SUBSIDING TO 1 TO 3 FT.
.FRIDAY NIGHT...SOUTHWEST WINDS AROUND 10 KT INCREASING TO 10 TO
20 KT AFTER MIDNIGHT. CHANCE OF SNOW OVERNIGHT. WAVES 1 TO 3 FT
BUILDING TO 2 TO 4 FT.
.SATURDAY...SOUTHWEST WINDS 10 TO 20 KT BECOMING WEST 15 TO 25
KT. WAVES 2 TO 4 FT.
.SATURDAY NIGHT...WEST WINDS 10 TO 20 KT DIMINISHING TO 5 TO 10
KT. WAVES 1 TO 3 FT.
.SUNDAY...WEST WINDS 5 TO 10 KT BECOMING SOUTHWEST 10 TO 20 KT IN
THE AFTERNOON. WAVES 1 TO 2 FT.
.SUNDAY NIGHT...SOUTHWEST WINDS 10 TO 20 KT. WAVES 1 TO 3 FT.
.MONDAY...SOUTH WINDS 5 TO 10 KT BECOMING SOUTHEAST 10 TO 15 KT.
CHANCE OF A WINTRY MIX. WAVES 1 TO 2 FT.
.TUESDAY...EAST WINDS 10 TO 20 KT. CHANCE OF RAIN AND SNOW. WAVES
1 TO 3 FT.

$$

LMZ080-366-565-567-669-671-673-675-777-779-868-870-872-874-876-
878-130900-
LAKE MICHIGAN FROM MICHIGAN CITY IN TO ST. JOSEPH MI 5 NM
OFFSHORE TO MID LAKE-
LAKE MICHIGAN FROM POINT BETSIE TO MANISTEE MI 5 NM OFFSHORE TO
MID LAKE-
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 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-
845 PM CST THU JAN 12 2017

STURGEON BAY WI TO POINT BETSIE MI SOUTH...

.REST OF TONIGHT...NORTHWEST WINDS TO 30 KT. FREEZING SPRAY.
WAVES 5 TO 8 FT OCCASIONALLY TO 10 FT.
.FRIDAY...NORTH WINDS 10 TO 20 KT BECOMING NORTHEAST EARLY IN THE
AFTERNOON. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT SUBSIDING TO 2 TO
4 FT.
.FRIDAY NIGHT...EAST WINDS 10 TO 20 KT BECOMING SOUTHEAST 10 TO
15 KT AFTER MIDNIGHT. WAVES 1 TO 3 FT.
.SATURDAY...SOUTH WINDS 10 TO 15 KT VEERING TO WEST. WAVES 1 TO
2 FT.
.SATURDAY NIGHT...NORTHWEST WINDS 10 TO 15 KT DIMINISHING TO 5
TO 10 KT. WAVES 1 TO 2 FT.
.SUNDAY...NORTHWEST WINDS 5 TO 10 KT BACKING TO SOUTH 10 TO 15
KT. WAVES 1 TO 2 FT.
.SUNDAY NIGHT...SOUTHEAST WINDS 10 TO 15 KT INCREASING TO 10 TO
20 KT. CHANCE OF LIGHT FREEZING RAIN AND SNOW. WAVES 1 TO 2 FT.
.MONDAY...SOUTHEAST WINDS 10 TO 20 KT INCREASING TO 15 TO 25 KT.
A WINTRY MIX LIKELY. WAVES 1 TO 3 FT.
.TUESDAY...SOUTHEAST WINDS 10 TO 20 KT BECOMING SOUTHWEST 15 TO
25 KT. CHANCE OF RAIN AND SNOW. WAVES 2 TO 4 FT.

$$
LMZ761-130900-
MAFOR 1304/
MICHIGAN NORTH...GALE WARNING IN EFFECT...11650 11740 11730
12720 11710 11700 11500. FREEZING SPRAY TONIGHT. WAVES 6 TO 9
FT OCCASIONALLY TO 11 FT SUBSIDING TO 3 TO 6 FT OCCASIONALLY TO
8 FT FRIDAY MORNING AND TO 1 TO 3 FT FRIDAY AFTERNOON.

MICHIGAN SOUTH 12740 11730 12820 12110 11220. FREEZING SPRAY
TONIGHT. WAVES 5 TO 8 FT OCCASIONALLY TO 10 FT SUBSIDING TO 4
TO 6 FT OCCASIONALLY TO 8 FT FRIDAY MORNING AND TO 2 TO 4 FT
FRIDAY AFTERNOON.

$$

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.