663  
FZUS63 KDTX 181938  
GLFSC  
 
LAKE ST CLAIR FORECAST  
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI  
338 PM EDT FRI JUL 18 2025  
 
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  
HIGH PRESSURE, 30.20 INCHES, TRACKS OVERHEAD TODAY.  
THE NEXT WEAK LOW PRESSURE MOVES INTO THE AREA ON SATURDAY  
BRINGING HUMID AND UNSETTLED CONDITIONS. THE COLD FRONT MOVES  
THROUGH THE AREA SATURDAY NIGHT WITH HIGH PRESSURE BUILDING BACK  
IN LATE SUNDAY INTO MONDAY.  
 
LCZ460-190400-  
LAKE ST CLAIR-  
338 PM EDT FRI JUL 18 2025  
   
TONIGHT  
SOUTHEAST WINDS 5 TO 10 KNOTS. MOSTLY CLEAR. WAVES 2 FEET  
OR LESS.   
SATURDAY  
SOUTH WINDS 5 TO 10 KNOTS INCREASING TO 10 TO 15 KNOTS  
IN THE AFTERNOON. PARTLY SUNNY. LIGHT SHOWERS LIKELY LATE IN THE  
AFTERNOON. WAVES 2 FEET OR LESS.   
SATURDAY NIGHT  
SOUTHWEST WINDS 10 TO 15 KNOTS BECOMING WEST 5 TO  
10 KNOTS IN THE LATE EVENING AND EARLY MORNING...THEN BECOMING  
NORTHWEST 10 TO 15 KNOTS AFTER MIDNIGHT. MOSTLY CLOUDY EARLY IN THE  
EVENING BECOMING PARTLY CLOUDY. LIGHT SHOWERS LIKELY AND A CHANCE OF  
THUNDERSTORMS UNTIL EARLY MORNING. WAVES 2 FEET OR LESS.   
SUNDAY  
NORTH WINDS 10 TO 15 KNOTS DIMINISHING TO 5 TO 10 KNOTS IN  
THE LATE MORNING AND AFTERNOON. PARTLY SUNNY. WAVES 2 FEET OR LESS.   
SUNDAY NIGHT  
NORTHEAST WINDS 10 TO 15 KNOTS DIMINISHING TO 5 TO  
10 KNOTS IN THE LATE EVENING AND OVERNIGHT. CLEAR. WAVES 2 FEET OR  
LESS.   
MONDAY  
NORTHEAST WINDS 5 TO 10 KNOTS INCREASING TO 10 TO 15 KNOTS  
IN THE EVENING. SUNNY IN THE MORNING BECOMING MOSTLY CLEAR. WAVES 2  
FEET OR LESS.   
TUESDAY  
SOUTHEAST WINDS 5 TO 10 KNOTS. MOSTLY CLEAR. WAVES 2 FEET  
OR LESS.   
WEDNESDAY  
SOUTHWEST WINDS 10 TO 15 KNOTS. PARTLY CLOUDY. A CHANCE  
OF SHOWERS AND THUNDERSTORMS. WAVES 2 FEET OR LESS.  
 
 
 
TF  
 
EXPERIMENTAL MODERNIZED OPEN LAKE FORECAST IS AVAILABLE ONLINE AT  
WEATHER.GOV/DTX/GLFTABLESC  
 
GRAPHICAL MARINE FORECASTS ARE AVAILABLE AT WEATHER.GOV/GREATLAKES  
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