603 
FZUS63 KDTX 220129
GLFSC 

LAKE ST CLAIR FORECAST
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
928 PM EDT TUE MAY 21 2013

.SYNOPSIS...A LARGE LOW PRESSURE SYSTEM...AVERAGING 29.40 
INCHES...WILL CONTINUE TO STALL OVER THE NORTHERN PLAINS BRINGING 
SEVERAL ROUNDS OF SHOWERS AND THUNDERSTORMS THROUGH WEDNESDAY. THIS 
LOW WILL PASS THROUGH THE SOUTHERN GREAT LAKES ON 
THURSDAY...ALLOWING HIGH PRESSURE TO BUILD BACK IN FROM THE NORTH ON 
FRIDAY.

LCZ460-220800-
LAKE ST CLAIR-
928 PM EDT TUE MAY 21 2013

.REST OF TONIGHT...LIGHT AND VARIABLE WINDS...BECOMING SOUTHWEST
5 TO 10 KNOTS AFTER MIDNIGHT. PARTLY CLOUDY WITH ISOLATED SHOWERS
AND THUNDERSTORMS. WAVES 2 FEET OR LESS. 
.WEDNESDAY...SOUTH WINDS 5 TO 10 KNOTS...INCREASING TO 10 TO
15 KNOTS BY AFTERNOON. MOSTLY CLOUDY WITH SHOWERS AND THUNDERSTORMS
LIKELY. WAVES 2 FEET OR LESS. 
.WEDNESDAY NIGHT...WEST WINDS 5 TO 10 KNOTS. A CHANCE OF SHOWERS.
MOSTLY CLOUDY THROUGH MIDNIGHT...BECOMING PARTLY CLOUDY OVERNIGHT.
WAVES 2 FEET OR LESS. 
.THURSDAY...WEST WINDS 5 TO 10 KNOTS...BECOMING NORTH 10 TO 15 KNOTS
BY MID AFTERNOON. MOSTLY CLOUDY WITH A CHANCE OF LIGHT SHOWERS.
WAVES 2 FEET OR LESS. 
.THURSDAY NIGHT...NORTH WINDS 10 TO 15 KNOTS. MOSTLY CLEAR. WAVES
1 TO 3 FEET. 
.FRIDAY...NORTH WINDS 10 TO 15 KNOTS...BECOMING LIGHT AND VARIABLE.
MOSTLY CLEAR. WAVES 2 FEET OR LESS. 
.SATURDAY...LIGHT AND VARIABLE WINDS. MOSTLY CLEAR. WAVES 2 FEET OR
LESS. 
.SUNDAY...EAST WINDS 5 TO 10 KNOTS. MOSTLY CLEAR. WAVES 2 FEET OR
LESS. 

$$

SC

WAVES ARE THE SIGNIFICANT WAVE HEIGHT - THE AVERAGE OF THE HIGHEST
1/3 OF THE WAVE SPECTRUM. MAXIMUM WAVE HEIGHT IS THE HIGHEST 1/20
WAVE HEIGHT.

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