175  
FNUS71 KLWX 081211  
FWSLWX  
 
SPOT FORECAST FOR THE INSTITUTE PRESCRIBED BURN...VIRGINIA DEPARTMENT OF FORESTRY  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
811 AM EDT THU APR 8 2021  
 
FORECAST IS BASED ON IGNITION TIME OF 0900 EDT ON APRIL 08.  
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER  
SERVICE.  
   
DISCUSSION
 
 
HIGH PRESSURE SITTING OFF THE COAST WILL LEAD TO CONTINUED ON-SHORE  
FLOW THROUGH FRIDAY. THE ON-SHORE FLOW WILL LEAD TO INCREASING  
MOISTURE THROUGH EARLY THIS WEEKEND WITH MINRH NOT DROPPING BELOW  
40. A WAVE OF SHOWERS WILL BE POSSIBLE THIS EVENING AND INTO EARLY  
FRIDAY MORNING WITH DRIZZLE LIKELY ON FRIDAY.  
   
REST OF TODAY
 
 
SKY/WEATHER.........PARTLY SUNNY (50-60 PERCENT).  
MAX TEMPERATURE.....AROUND 70.  
MIN HUMIDITY........41 PERCENT.  
WIND (20 FT)........SOUTHEAST WINDS 6 TO 10 MPH.  
MIXING HEIGHT.......3500 FT AGL.  
TRANSPORT WINDS.....SOUTHEAST 10 TO 16 MPH INCREASING TO 20 TO 23  
MPH LATE IN THE MORNING.  
SMOKE DISPERSAL.....POOR (7400 KNOT-FT) EARLY IN THE MORNING  
INCREASING TO EXCELLENT (70500 KNOT-FT) IN THE  
AFTERNOON.  
 
TIME (EDT) 9 AM 11 AM 1 PM 3 PM 5 PM  
SKY (%).........57 49 48 61 61  
WEATHER COV.....  
WEATHER TYPE....NONE NONE NONE NONE NONE  
TEMP............56 64 68 70 69  
RH..............59 46 42 41 42  
20 FT WIND......SE 6 SE 7 SE 9 SE 10 SE 10  
20 FT WIND GUST.10 13 14 16 16  
MIX HGT (FT)....800 2200 3100 3500 3200  
MIXNG WIND......SE 10 SE 20 SE 22 SE 22 SE 23  
VRATE KT-FT/10007 37 59 67 64  
   
TONIGHT
 
 
SKY/WEATHER.........MOSTLY CLOUDY (75-85 PERCENT). INCREASING  
CHANCES FOR SHOWERS THROUGH THIS EVENING.  
 
MIN TEMPERATURE.....AROUND 50.  
MAX HUMIDITY........93 PERCENT.  
WIND (20 FT)........SOUTHEAST WINDS 6 TO 10 MPH.  
MIXING HEIGHT.......300 FT AGL.  
TRANSPORT WINDS.....SOUTHEAST 14 TO 20 MPH.  
SMOKE DISPERSAL.....GOOD (39300 KNOT-FT) EARLY IN THE EVENING  
DECREASING TO POOR (3500 KNOT-FT) LATE IN THE  
NIGHT.  
 
TIME (EDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM  
SKY (%).........61 66 79 90 98 96  
WEATHER COV..... S CHC S CHC CHANCE CHANCE CHANCE  
WEATHER TYPE....NONE RNSHWR RNSHWR RNSHWR RNSHWR RNSHWR  
TEMP............67 61 57 55 53 51  
RH..............43 51 59 66 77 86  
20 FT WIND......SE 10 SE 9 SE 8 SE 6 SE 6 SE 6  
20 FT WIND GUST.14 11 11 11 10 11  
MIX HGT (FT)....2300 400 400 700 600 500  
MIXNG WIND......SE 20 SE 15 SE 16 SE 16 SE 14 SE 14  
VRATE KT-FT/100039 5 6 9 7 6  
   
FRIDAY
 
 
SKY/WEATHER.........CLOUDY (90-100 PERCENT). CHANCE OF RAIN  
SHOWERS.  
MAX TEMPERATURE.....AROUND 58.  
MIN HUMIDITY........77 PERCENT.  
WIND (20 FT)........SOUTHEAST WINDS AROUND 6 MPH.  
MIXING HEIGHT.......1000 FT AGL.  
TRANSPORT WINDS.....SOUTHEAST 10 TO 14 MPH.  
SMOKE DISPERSAL.....POOR (5400 KNOT-FT).  
 
TIME (EDT) 6 AM 9 AM NOON 3 PM  
SKY (%).........95 96 93 89  
WEATHER COV.....CHANCE CHANCE CHANCE CHANCE  
WEATHER TYPE....RNSHWR RNSHWR RNSHWR RNSHWR  
TEMP............50 51 54 56  
RH..............89 93 90 80  
20 FT WIND......SE 6G12 SE 6G12 SE 6G14 SE 6G13  
MIX HGT (FT)....500 600 900 1000  
MIXNG WIND......SE 14 SE 12 SE 10 SE 12  
VRATE KT-FT/10006 6 8 10  
 

 
FORECASTER...GEIGER  
REQUESTED BY...JORDAN HERRING  
TYPE OF REQUEST...PRESCRIBED  
.TAG 2108364.0/LWX  
.DELDT 04/08/21  
.FORMATTERVERSION 1.0.26  
 
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