Great Lakes Forecast
Issued by NWS

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746
FZUS63 KLOT 221447
GLFLM

OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
847 AM CST WED FEB 22 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 29.6 INCHES OVER SOUTHERN MINNESOTA
WILL DEEPEN TO AROUND 29.5 INCHES AS IT PASSES OVER THE WESTERN
GREAT LAKES THIS EVENING. A COLD FRONT WILL THEN SHIFT SOUTH DOWN
THE LAKE THURSDAY. STRONG LOW PRESSURE AROUND 29.3 INCHES WILL
MOVE NORTHEAST OVER THE LOWER GREAT LAKES FRIDAY NIGHT INTO EARLY
SATURDAY. RIDGING WITH A CENTRAL PRESSURE OF 30.2 INCHES WILL MOVE
ACROSS THE LAKE LATE SATURDAY INTO EARLY SUNDAY.

LMZ261-362-364-366-563-565-567-868-222100-
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-
847 AM CST WED FEB 22 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

...DENSE FOG ADVISORY IN EFFECT UNTIL 9 PM CST THIS EVENING...
...GALE WATCH IN EFFECT FROM LATE THURSDAY NIGHT THROUGH FRIDAY
AFTERNOON...

.REST OF TODAY...SOUTHWEST WINDS 10 TO 20 KT BECOMING SOUTH 15 TO
25 KT. AREAS OF DENSE FOG. SLIGHT CHANCE OF RAIN THIS AFTERNOON.
WAVES 1 TO 3 FT.
.TONIGHT...SOUTH WINDS 15 TO 25 KT VEERING TO NORTHWEST 10 TO 20
KT. AREAS OF DENSE FOG IN THE EVENING. SLIGHT CHANCE OF RAIN IN
THE EVENING...THEN CHANCE OF RAIN AND FREEZING RAIN OVERNIGHT.
WAVES 2 TO 4 FT.
.THURSDAY...NORTH WINDS 15 TO 25 KT BECOMING EAST TO 30 KT LATE
IN THE AFTERNOON. WAVES 2 TO 4 FT.
.THURSDAY NIGHT...NORTHEAST WINDS TO 30 KT BECOMING EAST GALES TO
35 KT. RAIN LIKELY WITH A CHANCE OF SNOW IN THE EVENING...THEN
RAIN AND SNOW OVERNIGHT. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT
BUILDING TO 5 TO 8 FT OCCASIONALLY TO 10 FT.
.FRIDAY...EAST GALES TO 35 KT DIMINISHING TO 30 KT IN THE
AFTERNOON. RAIN, FREEZING RAIN AND SNOW IN THE MORNING...THEN
RAIN AND FREEZING RAIN IN THE AFTERNOON. WAVES 8 TO 12 FT
OCCASIONALLY TO 15 FT.
.FRIDAY NIGHT...NORTHEAST WINDS 15 TO 25 KT BECOMING NORTH TO 30
KT LATE. RAIN, SNOW AND FREEZING RAIN LIKELY. WAVES 8 TO 11 FT
OCCASIONALLY TO 14 FT SUBSIDING TO 4 TO 6 FT OCCASIONALLY TO 8 FT.
.SATURDAY...NORTHWEST GALES TO 35 KT. SNOW. WAVES 4 TO 6 FT
OCCASIONALLY TO 8 FT BUILDING TO 5 TO 8 FT OCCASIONALLY TO 10 FT.
.SUNDAY...WEST WINDS 15 TO 25 KT INCREASING TO 30 KT. CHANCE OF
SNOW SHOWERS. WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-222100-
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-
847 AM CST WED FEB 22 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

...DENSE FOG ADVISORY IN EFFECT UNTIL 9 PM CST THIS EVENING...
...GALE WATCH IN EFFECT FROM LATE THURSDAY NIGHT THROUGH FRIDAY
MORNING...

.REST OF TODAY...SOUTH WINDS 10 TO 20 KT INCREASING TO 15 TO 25
KT. AREAS OF DENSE FOG. WAVES 1 TO 3 FT.
.TONIGHT...SOUTH WINDS 15 TO 25 KT VEERING TO NORTHWEST 10 TO 20
KT. AREAS OF DENSE FOG IN THE EVENING. WAVES 2 TO 4 FT.
.THURSDAY...NORTHWEST WINDS 10 TO 20 KT BECOMING NORTH 15 TO 25
KT...THEN INCREASING TO 30 KT LATE. WAVES 2 TO 4 FT.
.THURSDAY NIGHT...NORTHEAST WINDS TO 30 KT BECOMING EAST GALES
TO 35 KT. RAIN LIKELY IN THE EVENING...THEN RAIN OVERNIGHT. WAVES
4 TO 6 FT OCCASIONALLY TO 8 FT BUILDING TO 6 TO 9 FT OCCASIONALLY
TO 11 FT.
.FRIDAY...SOUTHEAST GALES TO 35 KT BECOMING SOUTH TO 30 KT. RAIN
SHOWERS WITH A CHANCE OF THUNDERSTORMS. WAVES SUBSIDING TO 5 TO 8
FT OCCASIONALLY TO 10 FT.
.FRIDAY NIGHT...WEST WINDS 15 TO 25 KT INCREASING TO 30 KT.
CHANCE OF RAIN AND SNOW. WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT
SUBSIDING TO 4 TO 6 FT OCCASIONALLY TO 8 FT.
.SATURDAY...WEST GALES TO 35 KT BECOMING NORTHWEST. SNOW LIKELY.
WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT BUILDING TO 8 TO 11 FT
OCCASIONALLY TO 14 FT.
.SUNDAY...WEST WINDS 15 TO 25 KT BECOMING SOUTHWEST TO 30 KT.
CHANCE OF SNOW SHOWERS. WAVES 5 TO 8 FT OCCASIONALLY TO 10 FT
SUBSIDING TO 4 TO 6 FT OCCASIONALLY TO 8 FT.

$$
LMZ761-222100-
MAFOR 2216/
MICHIGAN NORTH 11524 13434 11623 11720 11730 11830. CHANCE OF
RAIN AND FREEZING RAIN AFTER MIDNIGHT. WAVES 1 TO 3 FT TODAY AND
2 TO 4 FT TONIGHT.

MICHIGAN SOUTH 11424 13434 11523 11623 11720 11730. WAVES 1 TO 3
FT TODAY AND 2 TO 4 FT TONIGHT.

$$

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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