Great Lakes Forecast
Issued by NWS

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FZUS63 KLOT 122053
GLFLM

OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
253 PM CST SUN FEB 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 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 SOUTHEASTERN ONTARIO
IS PUSHING A COLD FRONT ACROSS THE LAKE. THIS LOW WILL MERGE WITH
A SECOND LOW OVER THE NEW ENGLAND AND DEEPEN TO 28.7 INCHES BY
MONDAY MORNING. MEANWHILE...HIGH PRESSURE OF 30.5 INCHES OVER THE
PLAINS WILL WEAKEN AND MOVE SOUTH OF THE LAKE BY MONDAY. ANOTHER
LOW OF 29.3 INCHES WILL SHIFT SOUTHWARD FROM NORTHERN MANITOBA
LATE MONDAY...TO SOUTHEASTERN ONTARIO BY TUESDAY AFTERNOON. THIS
LOW WILL PUSH ANOTHER COLD FRONT ACROSS THE LAKE TUESDAY
AFTERNOON.

LMZ261-362-364-366-563-565-567-868-130430-
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-
253 PM CST SUN FEB 12 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

...GALE WARNING IN EFFECT THROUGH LATE TONIGHT...

.TONIGHT...NORTHWEST GALES TO 45 KT EASING TO 40 KT GALES THIS
EVENING...THEN DIMINISHING TO 15 TO 25 KT OVERNIGHT. CHANCE OF
SNOW SHOWERS THIS EVENING. WAVES 8 TO 12 FT OCCASIONALLY TO 15 FT
SUBSIDING TO 4 TO 7 FT OCCASIONALLY TO 9 FT.
.MONDAY...NORTHWEST WINDS 10 TO 20 KT BECOMING SOUTHWEST 15 TO
25 KT. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT BUILDING TO 4 TO 6 FT
OCCASIONALLY TO 8 FT.
.MONDAY NIGHT...SOUTHWEST WINDS 15 TO 25 KT BECOMING WEST. WAVES
4 TO 6 FT OCCASIONALLY TO 8 FT.
.TUESDAY...WEST WINDS 15 TO 25 KT INCREASING TO 30 KT. CHANCE OF
SNOW SHOWERS IN THE AFTERNOON. WAVES 3 TO 5 FT OCCASIONALLY TO
7 FT.
.TUESDAY NIGHT...NORTHWEST WINDS TO 30 KT BECOMING NORTH. GALES TO
35 KT POSSIBLE. CHANCE OF SNOW SHOWERS. WAVES 5 TO 8 FT
OCCASIONALLY TO 10 FT.
.WEDNESDAY...NORTH WINDS TO 30 KT BECOMING NORTHWEST 15 TO 25 KT.
CHANCE OF SNOW SHOWERS. WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT
SUBSIDING TO 4 TO 6 FT OCCASIONALLY TO 8 FT.
.WEDNESDAY NIGHT...NORTH WINDS 15 TO 25 KT DIMINISHING TO 10 TO
20 KT. CHANCE OF SNOW SHOWERS. WAVES 3 TO 5 FT OCCASIONALLY TO
7 FT.
.THURSDAY...NORTHWEST WINDS 10 TO 15 KT BECOMING WEST. WAVES 1 TO
3 FT.
.FRIDAY...SOUTHEAST WINDS 10 TO 20 KT. WAVES 1 TO 2 FT.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-130430-
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-
253 PM CST SUN FEB 12 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

...GALE WARNING IN EFFECT THROUGH LATE TONIGHT...

.TONIGHT...NORTHWEST GALES TO 45 KT EASING TO 40 KT GALES THIS
EVENING...THEN DIMINISHING TO 30 KT OVERNIGHT. WAVES 10 TO 14 FT
OCCASIONALLY TO 18 FT SUBSIDING TO 7 TO 10 FT OCCASIONALLY TO 13
FT.
.MONDAY...NORTHWEST WINDS 10 TO 20 KT BACKING TO SOUTHWEST. WAVES
5 TO 8 FT OCCASIONALLY TO 10 FT SUBSIDING TO 2 TO 4 FT.
.MONDAY NIGHT...SOUTHWEST WINDS 10 TO 20 KT BECOMING WEST 15 TO
25 KT. WAVES 3 TO 5 FT OCCASIONALLY TO 7 FT.
.TUESDAY...WEST WINDS 15 TO 25 KT INCREASING TO 30 KT. WAVES 4 TO
6 FT OCCASIONALLY TO 8 FT.
.TUESDAY NIGHT...NORTHWEST WINDS TO 30 KT. GALES TO 35 KT
POSSIBLE. CHANCE OF SNOW SHOWERS OVERNIGHT. WAVES 4 TO 7 FT
OCCASIONALLY TO 9 FT BUILDING TO 6 TO 9 FT OCCASIONALLY TO 11 FT.
.WEDNESDAY...NORTHWEST WINDS TO 30 KT DIMINISHING TO 15 TO 25 KT.
CHANCE OF SNOW SHOWERS. WAVES 5 TO 8 FT OCCASIONALLY TO 10 FT.
.WEDNESDAY NIGHT...NORTHWEST WINDS 10 TO 20 KT. CHANCE OF SNOW
SHOWERS. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT SUBSIDING TO 3 TO
5 FT OCCASIONALLY TO 7 FT.
.THURSDAY...NORTHWEST WINDS 10 TO 15 KT BACKING TO SOUTHWEST.
WAVES 2 TO 4 FT.
.FRIDAY...SOUTHEAST WINDS 10 TO 20 KT. WAVES 1 TO 2 FT.

$$

LMZ761-130430-
MAFOR 1222/
MICHIGAN NORTH...GALE WARNING IN EFFECT...11760 13750 11740 19730
11720 19620 11520 11530. CHANCE OF SNOW SHOWERS THIS EVENING.
WAVES 8 TO 12 FT OCCASIONALLY TO 15 FT SUBSIDING TO 4 TO 7 FT
OCCASIONALLY TO 9 FT TONIGHT. WAVES 3 TO 5 FT OCCASIONALLY TO 7
FT SUBSIDING TO 4 TO 6 FT OCCASIONALLY TO 8 FT MONDAY.

MICHIGAN SOUTH...GALE WARNING IN EFFECT...11760 13750 11740
11720 11610 11520. WAVES 10 TO 14 FT OCCASIONALLY TO 18 FT
SUBSIDING TO 7 TO 10 FT OCCASIONALLY TO 13 FT TONIGHT. WAVES 5 TO
8 FT OCCASIONALLY TO 10 FT SUBSIDING TO 2 TO 4 FT MONDAY.

$$


KJB

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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