946  
FZUS63 KDTX 170141 RRA  
GLFSC  
 
LAKE ST CLAIR FORECAST  
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI  
940 PM EDT WED AUG 16 2017  
 
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, 30.10 INCHES, WILL CONTINUE TO PUSH OFF  
TOWARDS UPSTATE NEW YORK THIS EVENING. LOW PRESSURE OVER THE  
CENTRAL US WILL DEEPEN TO 29.60 INCHES AS IT LIFTS INTO SOUTHERN  
MINNESOTA TONIGHT. THIS LOW WILL THEN MOVE TO UPPER MICHIGAN BY  
THURSDAY NIGHT, DEEPENING TO 29.50 INCHES. THE LOW WILL FORCE A WARM  
FRONT ACROSS LOWER MICHIGAN ON THURSDAY, THEN INTO LAKE HURON  
THURSDAY NIGHT. THE LOW WILL SLOWLY EXIT TO THE NORTHEAST OF LAKE  
HURON ON FRIDAY, WITH HIGH PRESSURE EXPECTED TO EXPAND ACROSS THE  
SOUTHERN GREAT LAKES ON SATURDAY.  
 
LCZ460-170800-  
LAKE ST CLAIR-  
940 PM EDT WED AUG 16 2017  
   
REST OF TONIGHT
 
EAST WINDS 5 TO 10 KNOTS. PARTLY CLOUDY IN THE  
LATE EVENING AND EARLY MORNING BECOMING MOSTLY CLOUDY. WAVES 2 FEET  
OR LESS.   
THURSDAY
 
SOUTHEAST WINDS 10 TO 15 KNOTS. MOSTLY CLOUDY. A CHANCE  
OF SHOWERS AND THUNDERSTORMS IN THE MORNING...THEN SHOWERS AND  
THUNDERSTORMS LIKELY IN THE AFTERNOON. WAVES 2 FEET OR LESS.   
THURSDAY NIGHT
 
SOUTHWEST WINDS 10 TO 15 KNOTS. MOSTLY CLOUDY WITH  
SHOWERS AND THUNDERSTORMS LIKELY UNTIL EARLY MORNING...THEN PARTLY  
CLOUDY EARLY IN THE MORNING. WAVES 2 FEET OR LESS.   
FRIDAY
 
WEST WINDS 10 TO 15 KNOTS. PARTLY SUNNY. WAVES 2 FEET OR  
LESS.   
FRIDAY NIGHT
 
WEST WINDS 10 TO 15 KNOTS DIMINISHING TO 5 TO 10  
KNOTS AFTER MIDNIGHT. PARTLY CLOUDY. WAVES 2 FEET OR LESS.   
SATURDAY
 
NORTHWEST WINDS 5 TO 10 KNOTS. PARTLY SUNNY UNTIL LATE  
AFTERNOON...THEN PARTLY CLOUDY WITH A CHANCE OF SHOWERS AND  
THUNDERSTORMS EARLY IN THE EVENING. PARTLY CLOUDY LATE IN THE  
EVENING. WAVES 2 FEET OR LESS.   
SUNDAY
 
SOUTHWEST WINDS 5 TO 10 KNOTS. MOSTLY CLEAR. WAVES 2 FEET  
OR LESS.   
MONDAY
 
SOUTH WINDS 5 TO 10 KNOTS. MOSTLY CLEAR. WAVES 2 FEET OR  
LESS.  
 

 
 
DG  
 
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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