735  
FNUS72 KCHS 201200  
FWSCHS  
 
SPOT FORECAST FOR C156 #2...USFS  
NATIONAL WEATHER SERVICE CHARLESTON SC  
800 AM EDT TUE MAY 20 2025  
 
FORECAST IS BASED ON IGNITION TIME OF 0800 EDT ON MAY 20.  
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER  
SERVICE.  
   
DISCUSSION
 
 
SOUTHWEST SURFACE WINDS BETWEEN 5-10 MPH THIS MORNING ARE EXPECTED  
TO TURN MORE SOUTH AND INCREASE TO 13-18 MPH WITH A SEA BREEZE  
ARRIVING AT THE SPOT SITE BETWEEN 12 PM TO 2 PM. THERE IS ALSO A  
SLIGHT CHANCE FOR AN ISOLATED SHOWER AND/OR THUNDERSTORM TO IMPACT  
THE SITE MID-LATE AFTERNOON TODAY WITH GUSTY WINDS BEING THE  
PRIMARY CONCERN. A FEW SHOWERS AND THUNDERSTORMS COULD ALSO IMPACT  
THE SITE WITH THE ARRIVING COLD FRONT WEDNESDAY LATE MORNING AND  
AFTERNOON.  
 
FOG POTENTIAL FOR TONIGHT: LOW.  
 
   
REST OF TODAY
 
 
SKY/WEATHER.........MOSTLY SUNNY. SLIGHT CHANCE OF SHOWERS AND  
THUNDERSTORMS LATE IN THE AFTERNOON.  
CHANCE OF PCPN......20 PERCENT.  
MAX TEMPERATURE.....AROUND 88.  
MIN HUMIDITY........63 PERCENT.  
WIND (20 FT)........LIGHT WINDS BECOMING SOUTH 6 TO 10 MPH LATE IN  
THE AFTERNOON. GUSTY AND ERRATIC WINDS EXPECTED  
NEAR THUNDERSTORMS LATE IN THE AFTERNOON.  
MIXING HEIGHT.......MAX 2700 FT AGL.  
TRANSPORT WINDS.....LIGHT WINDS BECOMING SOUTH 6 TO 10 MPH IN THE  
LATE MORNING THROUGH THE AFTERNOON.  
MAX ADI.............31.  
INVERSION END.......1000  
 
TIME (EDT) 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM  
SKY (%).........51 51 51 50 49 48 47 45 44 42  
WEATHER TYPE.... RW RW RW RW  
TSTM COV........ SCH SCH SCH SCH  
CHC OF PCPN (%).0 0 0 0 0 0 20 20 20 20  
TEMP............73 78 83 86 87 88 87 86 85 84  
RH..............93 82 72 68 65 63 65 68 67 70  
20 FT WIND DIR..W W SW S S S S S S SE  
20 FT WIND SPD..1 2 2 3 3 5 7 8 8 9  
20 FT WIND GUST.2 4 5 7 7 9 11 13 13 14  
MIX HGT (KFT)...0.6 1.1 1.7 2.4 2.5 2.6 2.7 2.3 1.9 1.8  
TRANSP WIND DIR.W SW SW SW S S S S S S  
TRANSP WIND SPD.2 6 6 6 8 8 8 10 10 10  
LVORI...........8 4 3 3 3 2 3 3 3 3  
ADI.............1 6 13 22 22 26 31 27 26 24  
   
TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND  
THUNDERSTORMS EARLY IN THE EVENING.  
CHANCE OF PCPN......20 PERCENT.  
MIN TEMPERATURE.....AROUND 72.  
MAX HUMIDITY........100 PERCENT.  
WIND (20 FT)........SOUTH WINDS 5 TO 7 MPH SHIFTING TO THE  
SOUTHWEST AROUND 5 MPH OVERNIGHT. GUSTY AND  
ERRATIC WINDS EXPECTED NEAR THUNDERSTORMS EARLY  
IN THE EVENING.  
MAX LVORI...........9.  
MIN ADI.............1.  
INVERSION BEGIN.....1000  
 
TIME (EDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM  
SKY (%).........40 36 35 37 40 44  
WEATHER TYPE....RNSHWR NONE NONE NONE NONE NONE  
TSTM COV........S CHC  
CHC OF PCPN (%).20 10 10 10 10 10  
TEMP............83 78 75 73 73 73  
RH..............72 82 90 97 97 97  
20 FT WIND......SE 7 SE 6 S 5 S 5 SW 5 SW 5  
20 FT WIND GUST.13 11 9 7 7 7  
MIX HGT (FT)....1600 700 600 600 500 600  
TRANSPORT WIND..SE 8 SE 8 S 6 S 6 S 6 SW 6  
LVORI...........4 5 6 8 8 8  
ADI.............1 3 3 3 3 4  
   
WEDNESDAY
 
 
SKY/WEATHER.........MOSTLY SUNNY. SLIGHT CHANCE OF SHOWERS AND  
THUNDERSTORMS EARLY IN THE MORNING.  
CHANCE OF PCPN......20 PERCENT.  
MAX TEMPERATURE.....AROUND 91.  
MIN HUMIDITY........50 PERCENT.  
WIND (20 FT)........SOUTHWEST WINDS 5 TO 10 MPH. GUSTY AND ERRATIC  
WINDS EXPECTED NEAR THUNDERSTORMS EARLY IN THE  
MORNING.  
MIXING HEIGHT.......MAX 6200 FT AGL.  
TRANSPORT WINDS.....SOUTHWEST AROUND 8 MPH INCREASING TO WEST 18 TO  
24 MPH IN THE LATE MORNING AND AFTERNOON.  
MAX ADI.............137.  
INVERSION END.......0800  
 
TIME (EDT) 6 AM 10 AM 2 PM  
SKY (%).........48 25 30  
WEATHER TYPE....NONE RNSHWR RNSHWR  
TSTM COV........ S CHC S CHC  
CHC OF PCPN (%).10 20 20  
TEMP............72 83 88  
RH..............100 72 59  
20 FT WIND......SW 5G7 W 6G11 SW 9G14  
MIX HGT (FT)....600 3200 5200  
TRANSPORT WIND..SW 8 W 18 W 22  
LVORI...........9 3 1  
ADI.............6 72 137  
 

 
FORECASTER...APT  
REQUESTED BY...MIKE LESLIE  
TYPE OF REQUEST...PRESCRIBED  
.TAG 2514321.0/CHS  
.DELDT 05/20/25  
.FORMATTERVERSION 2.0.0  
.EMAIL MICHAEL.C.LESLIE@USDA.GOV  
 
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