429  
FZUS63 KDTX 240142  
GLFSC  
 
LAKE ST CLAIR FORECAST  
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI  
942 PM EDT MON OCT 23 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
 
LOW PRESSURE WILL DEEPEN TO 29.50 INCHES AS IT LIFTS  
INTO CENTRAL MICHIGAN THIS EVENING. THE LOW IS THEN FORECAST TO  
RAPIDLY DEEPEN TO 29.10 INCHES AS LIFTS INTO THE STRAITS REGION  
LATE TONIGHT. THERE WILL THEN BE A SLOW BUT STEADY WEAKENING OF  
THE LOW ACROSS THE NORTHERN GREAT LAKES ON TUESDAY BEFORE IT LIFTS  
NORTH OF THE REGION TUESDAY NIGHT INTO WEDNESDAY.  
 
LCZ460-240815-  
LAKE ST CLAIR-  
942 PM EDT MON OCT 23 2017  
   
..SMALL CRAFT ADVISORY IN EFFECT THROUGH TUESDAY AFTERNOON
 
 
...GALE WARNING IN EFFECT FROM TUESDAY AFTERNOON THROUGH LATE  
TUESDAY NIGHT...  
   
REST OF TONIGHT
 
SOUTHWEST WINDS 20 TO 25 KNOTS WITH GUSTS TO 30  
KNOTS. LIGHT RAIN THIS EVENING...THEN A CHANCE OF LIGHT RAIN  
AFTER MIDNIGHT. WAVES 2 TO 4 FEET.   
TUESDAY
 
SOUTH WINDS 20 TO 25 KNOTS BECOMING SOUTHWEST TO 30 KNOTS  
LATE IN THE AFTERNOON. GUSTS TO 35 KNOT GALES. MOSTLY CLOUDY. A  
CHANCE OF LIGHT RAIN EARLY IN THE MORNING...THEN LIGHT SHOWERS  
LIKELY IN THE LATE MORNING AND EARLY AFTERNOON. A CHANCE OF LIGHT  
SHOWERS LATE IN THE AFTERNOON. WAVES 2 TO 4 FEET.   
TUESDAY NIGHT
 
SOUTHWEST WINDS TO 30 KNOTS WITH GUSTS TO 40 KNOT  
GALES DIMINISHING TO 15 TO 20 KNOTS WITH GUSTS TO 30 KNOTS. CLOUDY  
WITH A CHANCE OF LIGHT SHOWERS. WAVES 2 TO 4 FEET.   
WEDNESDAY
 
SOUTHWEST WINDS 15 TO 20 KNOTS BECOMING WEST 10 TO 15  
KNOTS LATE IN THE AFTERNOON. CLOUDY WITH A CHANCE OF LIGHT SHOWERS.  
WAVES 1 TO 3 FEET.   
WEDNESDAY NIGHT
 
WEST WINDS 10 TO 15 KNOTS DIMINISHING TO 5 TO 10  
KNOTS AFTER MIDNIGHT. MOSTLY CLOUDY WITH A CHANCE OF LIGHT SHOWERS  
EARLY IN THE EVENING...THEN PARTLY CLOUDY IN THE LATE EVENING AND  
OVERNIGHT. WAVES 2 FEET OR LESS.   
THURSDAY
 
SOUTHWEST WINDS 5 TO 10 KNOTS BECOMING SOUTH 15 TO 20  
KNOTS. MOSTLY CLEAR. WAVES 2 FEET OR LESS.   
FRIDAY
 
WEST WINDS 15 TO 20 KNOTS. PARTLY CLOUDY. A CHANCE OF  
SHOWERS. WAVES 1 TO 3 FEET.   
SATURDAY
 
NORTHWEST WINDS 10 TO 15 KNOTS. PARTLY CLOUDY. A CHANCE  
OF SHOWERS. WAVES 2 FEET OR LESS.  
 

 
 
MANN  
 
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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