Great Lakes Forecast
Issued by NWS

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000
FZUS63 KLOT 181400
GLFLM

OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
900 AM CDT SAT MAR 18 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...
A TROUGH OF LOW PRESSURE AVERAGING 29.9 INCHES OVER THE CENTRAL
GREAT LAKES WILL MOVE SOUTHEAST REACHING THE CAROLINA COAST THIS
EVENING. HIGH PRESSURE OF 30.4 INCHES EXTENDS FROM HUDSON BAY
SOUTH ACROSS THE NORTHERN AND CENTRAL PLAINS. THIS HIGH WILL MOVE
EAST INTO THE WESTERN GREAT LAKES TONIGHT, THEN CONTINUE EAST TO
THE EASTERN SEABOARD BY MONDAY MORNING. MEANWHILE, LOW PRESSURE OF
29.2 INCHES WILL DEVELOP OVER ALBERTA TODAY, THEN DEEPEN TO 28.9
INCHES AS IT MOVES TO HUDSON BAY BY SUNDAY NIGHT. A COLD FRONT
TRAILING SOUTH FROM THIS LOW WILL MOVE ACROSS THE LAKE MONDAY
MORNING. HIGH PRESSURE OF 30.6 INCHES OVER THE CANADIAN PRAIRIES
MONDAY WILL BUILD SOUTHEAST WITH RIDGING EXTENDING INTO THE
WESTERN GREAT LAKES REGION BY MONDAY EVENING. THE CENTER OF THE
HIGH WILL REACH THE WESTERN GREAT LAKES BY MIDDAY WEDNESDAY.

LMZ261-362-364-563-182130-
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-
900 AM CDT SAT MAR 18 2017

STURGEON BAY WI TO POINT BETSIE MI NORTH...

.REST OF TODAY...NORTH WINDS 10 TO 20 KT. PATCHY FOG THIS
MORNING. CHANCE OF SNOW SHOWERS THIS MORNING...THEN SLIGHT CHANCE
OF SNOW SHOWERS THIS AFTERNOON. WAVES 2 TO 4 FT.
.TONIGHT...NORTH WINDS 10 TO 20 KT BECOMING NORTHEAST 10 TO 15
KT. WAVES 2 TO 4 FT SUBSIDING TO 1 TO 2 FT.
.SUNDAY...EAST WINDS 5 TO 10 KT BECOMING SOUTH LATE IN THE
MORNING...THEN BECOMING 10 TO 20 KT EARLY IN THE AFTERNOON
INCREASING TO 15 TO 25 KT LATE. WAVES 1 TO 2 FT BUILDING TO 2 TO
4 FT.
.SUNDAY NIGHT...SOUTH WINDS TO 30 KT BECOMING SOUTHWEST 15 TO
25 KT. CHANCE OF RAIN SHOWERS AND FREEZING RAIN IN THE EVENING...
THEN CHANCE OF RAIN SHOWERS AND FREEZING RAIN LIKELY OVERNIGHT.
WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT.
.MONDAY...WEST WINDS 10 TO 20 KT BECOMING NORTHWEST 10 TO 15 KT.
WAVES 2 TO 4 FT SUBSIDING TO 1 TO 3 FT.
.MONDAY NIGHT...NORTHWEST WINDS 10 TO 20 KT INCREASING TO 15 TO
25 KT. WAVES 1 TO 3 FT.
.TUESDAY...NORTHWEST WINDS 15 TO 25 KT INCREASING TO 30 KT. WAVES
2 TO 4 FT.
.WEDNESDAY...NORTH WINDS 10 TO 20 KT DIMINISHING TO 10 TO 15 KT.
WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT SUBSIDING TO 1 TO 3 FT.

$$

LMZ366-565-567-669-671-868-870-872-182130-
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 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-
900 AM CDT SAT MAR 18 2017

STURGEON BAY WI TO POINT BETSIE MI SOUTH TO NORTH POINT LIGHT WI
TO GRAND HAVEN MI...

.REST OF TODAY...NORTHWEST WINDS TO 30 KT DIMINISHING TO 15 TO
25 KT. PATCHY FOG THIS MORNING. SLIGHT CHANCE OF DRIZZLE OR SNOW
SHOWERS THIS MORNING...THEN SLIGHT CHANCE OF DRIZZLE THIS
AFTERNOON. WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT SUBSIDING TO 3 TO
5 FT OCCASIONALLY TO 7 FT.
.TONIGHT...NORTH WINDS 10 TO 20 KT BECOMING NORTHEAST AND
DIMINISHING TO AROUND 10 KT LATE. WAVES 2 TO 4 FT.
.SUNDAY...VARIABLE WINDS LESS THAN 10 KT BECOMING SOUTH LATE IN
THE MORNING...THEN GRADUALLY INCREASING TO 15 TO 25 KT DURING THE
AFTERNOON. WAVES 1 TO 3 FT BUILDING TO 2 TO 4 FT.
.SUNDAY NIGHT...SOUTH WINDS TO 30 KT BECOMING SOUTHWEST 15 TO
25 KT. SHOWERS LIKELY...ESPECIALLY LATE. WAVES 4 TO 6 FT
OCCASIONALLY TO 8 FT.
.MONDAY...WEST WINDS 10 TO 20 KT BECOMING NORTHWEST 10 TO 15 KT.
WAVES 2 TO 4 FT SUBSIDING TO 1 TO 3 FT.
.MONDAY NIGHT...NORTHWEST WINDS 10 TO 20 KT INCREASING TO 15 TO
25 KT. WAVES 1 TO 3 FT.
.TUESDAY...NORTHWEST WINDS 15 TO 25 KT BECOMING NORTH TO 30 KT.
WAVES 2 TO 4 FT.
.WEDNESDAY...NORTH WINDS 10 TO 20 KT. WAVES 3 TO 5 FT
OCCASIONALLY TO 7 FT.

$$

LMZ080-673-675-777-779-874-876-878-182130-
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-
900 AM CDT SAT MAR 18 2017

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

.REST OF TODAY...NORTHWEST WINDS TO 30 KT DIMINISHING TO 15 TO
25 KT. CHANCE OF DRIZZLE OR SNOW SHOWERS THIS MORNING...THEN
SLIGHT CHANCE OF DRIZZLE THIS AFTERNOON. WAVES 4 TO 7 FT
OCCASIONALLY TO 9 FT.
.TONIGHT...NORTHWEST WINDS 15 TO 25 KT BECOMING NORTH 10 TO
20 KT. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT SUBSIDING TO 2 TO
4 FT.
.SUNDAY...NORTHEAST WINDS 5 TO 10 KT BECOMING EAST LATE IN THE
MORNING...THEN BECOMING SOUTH 10 TO 15 KT EARLY IN THE AFTERNOON
INCREASING TO 10 TO 20 KT LATE. WAVES 1 TO 3 FT.
.SUNDAY NIGHT...SOUTH WINDS 10 TO 20 KT. CHANCE OF RAIN SHOWERS
OVERNIGHT. WAVES 2 TO 4 FT.
.MONDAY...SOUTHWEST WINDS 10 TO 20 KT VEERING TO NORTH. CHANCE OF
RAIN SHOWERS IN THE MORNING. WAVES 1 TO 3 FT SUBSIDING TO 1 TO
2 FT.
.MONDAY NIGHT...NORTH WINDS 10 TO 20 KT. WAVES 1 TO 3 FT.
.TUESDAY...NORTH WINDS 10 TO 20 KT. WAVES 1 TO 3 FT.
.WEDNESDAY...NORTH WINDS 10 TO 20 KT. WAVES 2 TO 4 FT.

$$
LMZ761-182130-
MAFOR 1815/
MICHIGAN NORTH 11720 12820 11830 12820 11110 11200. WAVES 2 TO 4
FT TODAY. WAVES 2 TO 4 FT SUBSIDING TO 1 TO 2 FT TONIGHT AND
SUNDAY MORNING.

MICHIGAN SOUTH 12740 12730 11830 11820 11810 11100. WAVES 4 TO 7
FT OCCASIONALLY TO 9 FT TODAY. WAVES 3 TO 5 FT OCCASIONALLY TO 7
FT SUBSIDING TO 2 TO 4 FT TONIGHT. WAVES 1 TO 3 FT SUNDAY
MORNING.


$$


RODRIGUEZ

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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