Great Lakes Forecast
Issued by NWS

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000
FZUS63 KDTX 230147
GLFSC

LAKE ST CLAIR FORECAST
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
947 PM EDT TUE JUL 22 2014

WAVES ARE THE SIGNIFICANT WAVE HEIGHT - THE AVERAGE OF THE HIGHEST
1/3 OF THE WAVE SPECTRUM. OCCASIONAL WAVE HEIGHT IS THE AVERAGE OF
THE HIGHEST 1/10 OF THE WAVE SPECTRUM.

.SYNOPSIS...LOW PRESSURE AVERAGING 29.50 INCHES WILL TRACK EASTWARD
ACROSS LAKE SUPERIOR TONIGHT INTO WESTERN ONTARIO. AN ASSOCIATED
COLD FRONT WILL SIMULTANEOUSLY SETTLE SOUTHWARD THROUGH LOWER
MICHIGAN. SURFACE HIGH PRESSURE...AVERAGING 30.20 INCHES...WILL THEN
BUILD INTO THE GREAT LAKES THROUGH THE REMAINDER OF THE WEEK.

LCZ460-230800-
LAKE ST CLAIR-
947 PM EDT TUE JUL 22 2014

.REST OF TONIGHT...SOUTHWEST WINDS 10 TO 15 KNOTS...DIMINISHING TO
5 TO 10 KNOTS BY MIDNIGHT...THEN BECOMING WEST 10 TO 15 KNOTS LATE.
A CHANCE OF SHOWERS AND THUNDERSTORMS. PARTLY CLOUDY THIS EVENING...
BECOMING MOSTLY CLOUDY OVERNIGHT. WAVES 2 FEET OR LESS.
.WEDNESDAY...NORTH WINDS 10 TO 15 KNOTS. PARTLY SUNNY. WAVES 2 FEET
OR LESS.
.WEDNESDAY NIGHT...NORTH WINDS 10 TO 15 KNOTS. MOSTLY CLEAR. WAVES
2 FEET OR LESS.
.THURSDAY...NORTH WINDS 5 TO 10 KNOTS. MOSTLY SUNNY. WAVES 2 FEET OR
LESS.
.THURSDAY NIGHT...NORTH WINDS 5 TO 10 KNOTS EARLY IN THE EVENING...
BECOMING LIGHT AND VARIABLE OVERNIGHT. MOSTLY CLEAR. WAVES 2 FEET OR
LESS.
.FRIDAY...SOUTHWEST WINDS 5 TO 10 KNOTS. SUNNY THROUGH EARLY
AFTERNOON...BECOMING MOSTLY CLEAR. WAVES 2 FEET OR LESS.
.SATURDAY...SOUTH WINDS 5 TO 10 KNOTS. A CHANCE OF SHOWERS AND
THUNDERSTORMS. PARTLY CLOUDY. WAVES 2 FEET OR LESS.
.SUNDAY...WEST WINDS 5 TO 10 KNOTS. A CHANCE OF SHOWERS AND
THUNDERSTORMS. PARTLY CLOUDY. WAVES 2 FEET OR LESS.

$$

DG

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






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