Great Lakes Forecast
Issued by NWS

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688
FZUS63 KDTX 220155
GLFSC

LAKE ST CLAIR FORECAST
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
955 PM EDT THU JUL 21 2016

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 29.60 INCHES...WILL CONTINUE TO
MOVE THROUGH NORTHERN ONTARIO AND PULL A WEAK COLD FRONT INTO
LAKE HURON AND LOWER MICHIGAN. UNSETTLED MARINE CONDITIONS WILL BE
RELATED TO THUNDERSTORM POTENTIAL THAT WILL BE MOSTLY CONFINED TO
THE SOUTH HALF OF LAKE HURON THROUGH LAKE ST CLAIR FRIDAY AFTERNOON.
HIGH PRESSURE THEN BUILDS BACK IN OVER THE GREAT LAKES FRIDAY NIGHT
INTO SATURDAY.

LCZ460-220815-
LAKE ST CLAIR-
955 PM EDT THU JUL 21 2016

.REST OF TONIGHT...SOUTHWEST WINDS 10 TO 15 KNOTS...BECOMING WEST
5 TO 10 KNOTS. PARTLY CLOUDY. WAVES 2 FEET OR LESS.
.FRIDAY...WEST WINDS 5 TO 10 KNOTS EARLY...BACKING TO THE
SOUTHWEST...THEN BACKING TO THE EAST BY EARLY AFTERNOON...BECOMING
LIGHT AND VARIABLE. PARTLY SUNNY. WAVES 2 FEET OR LESS.
.FRIDAY NIGHT...LIGHT AND VARIABLE WINDS...BECOMING NORTHWEST 5 TO
10 KNOTS BY MIDNIGHT. MOSTLY CLEAR. WAVES 2 FEET OR LESS.
.SATURDAY...LIGHT AND VARIABLE WINDS...BECOMING NORTHEAST 5 TO
10 KNOTS LATE. SUNNY. WAVES 2 FEET OR LESS.
.SATURDAY NIGHT...EAST WINDS 5 TO 10 KNOTS. MOSTLY CLEAR. WAVES
2 FEET OR LESS.
.SUNDAY...SOUTH WINDS 5 TO 10 KNOTS. PARTLY SUNNY...BECOMING MOSTLY
CLOUDY LATE...BECOMING PARTLY CLOUDY. A CHANCE OF SHOWERS AND
THUNDERSTORMS...THEN SHOWERS AND THUNDERSTORMS LIKELY THROUGH
MIDNIGHT. WAVES 2 FEET OR LESS.
.MONDAY...NORTHWEST WINDS 5 TO 10 KNOTS. PARTLY CLOUDY. SHOWERS AND
THUNDERSTORMS LIKELY. WAVES 2 FEET OR LESS.
.TUESDAY...NORTHEAST WINDS 5 TO 10 KNOTS. MOSTLY CLEAR. WAVES 2 FEET
OR LESS.

$$

BT

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



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