021  
FNUS71 KRNK 281040  
FWSRNK  
 
SPOT FORECAST FOR JAMES RIVER RX BURN...DCR-VA STATE 1PARKS  
NATIONAL WEATHER SERVICE BLACKSBURG VA  
640 AM EDT FRI APR 28 2017  
 
FORECAST IS BASED ON WEATHER INFORMATION FROM 0600 EDT ON APRIL 28.  
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER  
SERVICE.  
   
DISCUSSION
 
 
HIGH PRESSURE WILL BUILD OFF THE SOUTHEAST ATLANTIC COAST THROUGH  
THE UPCOMING WEEKEND. THIS WILL RESULT IN TEMPERATURES WELL ABOVE  
NORMAL THROUGH SUNDAY. ASIDE FOR AN ISOLATED AFTERNOON THUNDERSTORM  
WHICH MAY POP UP AT ANY TIME DURING THE PEAK HEATING PART OF THE DAY  
THIS WEEKEND, THERE IS LITTLE OR NO RAIN THREAT UNTIL THE ARRIVAL OF  
A COLD FRONT MONDAY.  
 
   
TODAY (FRIDAY)
 
 
SKY/WEATHER.........MORNING FOG, THEN SUNNY (LESS THAN 25 PERCENT CLOUD COVER).  
CWR (0.01 IN).......0 PERCENT.  
MAX TEMPERATURE.....AROUND 84.  
MIN HUMIDITY........40 PERCENT.  
WIND (20 FT)........LIGHT AND VARIABLE WINDS...BECOMING SOUTH 5 MPH  
MPH IN THE AFTERNOON.  
MIXING HEIGHT.......LESS THAN 1000 FT AGL THIS MORNING...INCREASING TO 4400  
FT AGL IN THE AFTERNOON.  
MIXING WINDS........INCREASING TO 10 TO 12 MPH IN THE AFTERNOON.  
LVORI...............5.  
ADI.................6...INCREASING TO 42.  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
 
TIME (EDT) 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM  
SKY (%).........48 36 25 16 14 14 14 13 11 11 10  
WEATHER COV.....  
WEATHER TYPE....  
TSTM COV........  
CWR.............0 0 0 0 0 0 0 0 0 0 0  
TEMP............62 63 68 72 75 78 80 81 83 84 84  
RH..............100 95 78 68 60 54 49 46 43 40 41  
20 FT WIND DIR..W W W S S S S S S S S  
20 FT WIND SPD..0 1 1 1 1 2 4 5 6 6 6  
20 FT WIND GUST. 5 5 10 10 10 10  
MIX HGT (KFT)...0.3 0.4 1.4 2.5 3.5 3.8 4.0 4.3 4.3 4.3 4.4  
MIXNG WIND DIR..W W W SW SW SW S S S S S  
MIXNG WIND SPD..0 1 1 1 2 3 5 6 8 10 12  
LVORI...........9 8 4 3 3 2 2 2 1 1 1  
ADI.............1 1 3 5 10 15 17 23 32 39 42  
HAINES INDEX....3 3 3 3 3 3 3 3 3 4 4  
   
TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY (25-35 PERCENT).  
CWR (0.01 IN).......0 PERCENT.  
MIN TEMPERATURE.....AROUND 63.  
MAX HUMIDITY........100 PERCENT.  
WIND (20 FT)........SOUTHWEST WINDS 5 MPH.  
MIXING HEIGHT.......1700 FT AGL...DECREASING TO 300 FT AGL EARLY IN  
THE EVENING.  
MIXING WINDS........SOUTHWEST 5 TO 10 MPH.  
LVORI...............4.  
ADI.................30...DECREASING TO 5.  
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
 
TIME (EDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM  
SKY (%).........12 19 33 42 47 41  
WEATHER COV.....  
WEATHER TYPE....NONE NONE NONE NONE NONE NONE  
TSTM COV........  
CWR.............0 0 0 0 0 0  
TEMP............83 77 73 71 70 68  
RH..............44 57 66 73 77 84  
20 FT WIND......S 6 S 5 S 5 S 5 S 5 SW 5  
20 FT WIND GUST.10 10 10 10 10 10  
MIX HGT (FT)....3000 400 300 300 300 300  
MIXING WIND.....S 10 S 6 S 5 S 6 S 7 SW 8  
LVORI...........2 3 3 3 4 4  
ADI.............30 2 2 4 6 7  
HAINES INDEX....4 4 4 4 4 4  
   
SATURDAY
 
 
SKY/WEATHER.........MOSTLY SUNNY (25-35 PERCENT).  
CWR (0.01 IN).......10 PERCENT.  
MAX TEMPERATURE.....AROUND 91.  
MIN HUMIDITY........42 PERCENT.  
WIND (20 FT)........SOUTHWEST WINDS 5 TO 9 MPH.  
MIXING HEIGHT.......1700 FT AGL...INCREASING TO 3500 FT AGL.  
MIXING WINDS........SOUTHWEST 6 TO 15 MPH...INCREASING TO 17 TO 20  
MPH LATE.  
LVORI...............5.  
ADI.................6...INCREASING TO 45.  
HAINES INDEX........4 TO 5 OR LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH TO OR MODERATE POTENTIAL  
FOR LARGE PLUME DOMINATED FIRE GROWTH.  
 
TIME (EDT) 6 AM 8 AM 10 AM NOON 2 PM 4 PM  
SKY (%).........38 37 22 17 18 21  
WEATHER COV.....  
WEATHER TYPE....NONE NONE NONE NONE NONE NONE  
TSTM COV........  
CWR.............0 0 10 10 10 10  
TEMP............65 68 77 82 86 89  
RH..............97 85 70 57 48 44  
20 FT WIND......SW 5 SW 5 SW 6 SW 7 SW 8 SW 9  
20 FT WIND GUST.10 10 15 15 15 15  
MIX HGT (FT)....300 400 1700 2600 3100 3400  
MIXING WIND.....SW 7 SW 6 SW 9 SW 13 SW 13 SW 17  
LVORI...........8 5 3 1 1 1  
ADI.............3 4 20 36 41 42  
HAINES INDEX....4 4 4 4 5 5  
 

 
FORECASTER...MANUEL  
REQUESTED BY...AL CIRE  
TYPE OF REQUEST...PRESCRIBED  
.TAG 1707926.0/RNK  
 
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