619  
FNUS74 KLCH 172129  
FWSLCH  
 
SPOT FORECAST FOR TRUCK HAZMAT...STATE PD  
NATIONAL WEATHER SERVICE LAKE CHARLES LA  
429 PM CDT FRI AUG 17 2018  
 
FORECAST IS BASED ON FORECAST START TIME OF 1400 CDT ON AUGUST 17.  
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER  
SERVICE.  
 
PLEASE CONTACT OUR OFFICE AT (337) 477-5285, IF YOU HAVE QUESTIONS  
OR CONCERNS WITH THIS FORECAST.  
   
DISCUSSION
 
 
IN THE SHORT TERM, THUNDERSTORM NEAR BREAUX BRIDGE CONTINUES TO MOVE  
SLOWLY EAST TOWARD THE HAZMAT AREA, WITH NEAREST LIGHTNING STRIKES ABOUT  
5 MILES TO THE WEST AT THIS TIME. IT IS NOT CERTAIN IF RAINFALL WILL  
REACH THE HAZMAT AREA, AS THE THUNDERSTORM DOES SEEM TO BE WEAKENING. IT  
ALSO APPEARS THAT OUTFLOW WILL BE PUSHED TOWARD THE HAZMAT AREA, SO A  
WIND SHIFT AND INCREASE IN EASTERLY WINDS IS POSSIBLE.  
 
ISOLATED SHOWERS AND/OR THUNDERSTORMS WILL BE POSSIBLE THE REST OF THE  
AFTERNOON.  
   
REST OF TODAY
 
 
SKY/WEATHER.........PARTLY SUNNY (50-60 PERCENT). CHANCE OF SHOWERS  
AND THUNDERSTORMS.  
CHANCE OF PCPN......30 PERCENT.  
MAX TEMPERATURE.....AROUND 88.  
MIN HUMIDITY........65 PERCENT.  
SURFACE WINDS.......SOUTH WINDS 5 TO 7 MPH.  
MIXING HEIGHT.......4400-5400 FT AGL.  
TRANSPORT WINDS.....SOUTH 5 TO 8 MPH.  
 
TIME (CDT) 2PM 3PM 4PM 5PM  
SKY (%).........47 52 56 70  
WEATHER COV.....CHC CHC CHC DEF  
WEATHER TYPE....RW RW RW RW  
TSTM COV........CHC CHC CHC DEF  
CHC OF PCPN (%).30 30 30 80  
TEMP............88 88 88 87  
RH..............68 66 66 65  
SURFACE WND DIR.S S S S  
SURFACE WND SPD.6 8 8 8  
SURFACE WND GST.  
MIX HGT (KFT)...5.4 5.3 4.9 4.4  
TRANSP WIND DIR.S S S S  
TRANSP WIND SPD.5 6 7 8  
   
TONIGHT
 
 
SKY/WEATHER.........MOSTLY CLOUDY (55-65 PERCENT) THEN BECOMING  
PARTLY CLOUDY (40-50 PERCENT) THEN BECOMING  
MOSTLY CLOUDY (50-60 PERCENT). CHANCE OF  
SHOWERS AND THUNDERSTORMS EARLY IN THE EVENING,  
THEN SLIGHT CHANCE OF SHOWERS AND  
THUNDERSTORMS.  
CHANCE OF PCPN......30 PERCENT.  
MIN TEMPERATURE.....AROUND 75.  
MAX HUMIDITY........100 PERCENT.  
SURFACE WINDS.......SOUTH WINDS 5 TO 7 MPH EARLY IN THE EVENING  
BECOMING LIGHT.  
MIXING HEIGHT.......2400-3900 FT AGL DECREASING TO 300-1900 FT AGL  
IN THE LATE EVENING AND OVERNIGHT.  
TRANSPORT WINDS.....SOUTHEAST 1 TO 10 MPH.  
 
TIME (CDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM  
SKY (%).........70 68 63 58 54 49 44 39 43 46 50 54  
WEATHER COV.....LKY CHC CHC SCH SCH SCH SCH SCH SCH SCH SCH SCH  
WEATHER TYPE....RW RW RW RW RW RW RW RW RW RW RW RW  
TSTM COV........LKY SCH SCH SCH SCH SCH SCH SCH SCH SCH SCH SCH  
CHC OF PCPN (%).70 50 40 20 20 20 20 20 20 20 20 20  
TEMP............86 84 82 80 79 78 78 78 77 76 75 75  
RH..............68 71 79 84 88 90 91 92 93 96 99 100  
SURFACE WND DIR.S S S S S S S S S S S S  
SURFACE WND SPD.8 8 6 5 4 4 4 4 4 3 3 3  
SURFACE WND GST.  
MIX HGT (KFT)...3.9 3.5 2.9 2.4 1.9 1.3 0.8 0.3 0.3 0.3 0.3 0.3  
TRANSP WIND DIR.S S S S S S SE SE SE SE SE SE  
TRANSP WIND SPD.10 10 9 7 5 3 2 2 2 2 2 1  
 

 
 
FORECASTER...CARBONI  
REQUESTED BY...SEAN LAFLEUR  
TYPE OF REQUEST...HAZMAT  
.TAG 1814652.0/LCH  
.DELDT 08/17/18  
.EMAIL SEANLAFLEUR@LA.GOV  
 
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