372  
FNUS71 KRNK 071003  
FWSRNK  
 
SPOT FORECAST FOR SLATE RIVER MILL RX...VDOF  
NATIONAL WEATHER SERVICE BLACKSBURG VA  
603 AM EDT TUE OCT 7 2025  
 
FORECAST IS BASED ON IGNITION TIME OF 1000 EDT ON OCTOBER 07.  
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER  
SERVICE.  
   
DISCUSSION
 
 
SURFACE HIGH PRESSURE SLIDES EAST THIS MORNING AHEAD OF A FRONTAL  
BOUNDARY APPROACHING THE AREA, LEADING TO PREDOMINANTLY SOUTH/  
SOUTHWEST WINDS FOR MOST OF THE DAY. WHILE WINDS LOOK TO BE CALM  
AT AROUND 5 MPH OR LESS THIS MORNING, THEY ARE EXPECTED TO  
INCREASE TO AROUND 5-10 MPH WITH GUSTS UP TO 10-20 MPH AT TIMES  
THROUGH THE LATE MORNING AND AFTERNOON HOURS. THIS SHOULD LEAD TO  
GOOD DISPERSIONS, ESPECIALLY SINCE MIXING HEIGHTS ARE FORECAST TO  
CLIMB TO AROUND 4000-5000 FT. ENOUGH MOISTURE COMING OFF THE  
ATLANTIC WILL ALSO LEAD TO MINIMUM RH VALUES ONLY FALLING TO  
AROUND 60% DURING THE AFTERNOON HOURS OF PEAK MIXING. RAIN CHANCES  
FROM THE INCOMING FRONT DON'T LOOK TO IMPACT THE BURN LOCATION  
UNTIL LATE TONIGHT INTO WEDNESDAY MORNING AS THE FRONT MAKES ITS  
CLOSEST APPROACH. OVERALL, THERE ARE NO FIRE WEATHER CONCERNS AT  
THIS TIME. THE WINDS ARE SLIGHTLY ELEVATED; HOWEVER, RH VALUES  
LOOK TO REMAIN HIGH ENOUGH THAT ANY FIRE SHOULDN'T GET OUT OF  
HAND.  
 
   
REST OF TODAY
 
 
SKY/WEATHER.........MOSTLY CLOUDY (65-75 PERCENT).  
CWR (0.01 IN).......10 PERCENT.  
MAX TEMPERATURE.....AROUND 79.  
MIN HUMIDITY........62 PERCENT.  
WIND (20 FT)........SOUTH WINDS 5 TO 7 MPH.  
MIXING HEIGHT.......4500 FT AGL.  
MIXING WINDS........SOUTHWEST 10 TO 18 MPH.  
SMOKE DISPERSAL.....POOR (11700 KNOT-FT) EARLY IN THE MORNING  
INCREASING TO EXCELLENT (71800 KNOT-FT) IN THE  
AFTERNOON.  
LVORI...............3.  
ADI.................15 EARLY IN THE MORNING INCREASING TO 76 IN THE  
AFTERNOON.  
 
TIME (EDT) 10A 11A 12P 1PM 2PM 3PM 4PM 5PM  
SKY (%).........60 60 60 60 62 62 72 80  
WEATHER COV.....  
WEATHER TYPE....  
TSTM COV........  
CWR.............0 0 0 0 0 0 10 10  
TEMP............69 74 76 78 79 79 79 79  
RH..............84 75 69 65 63 62 63 63  
20 FT WIND DIR..SW SW S S S S S S  
20 FT WIND SPD..5 6 6 7 7 7 7 6  
20 FT WIND GUST.10 10 11 12 13 13 12 11  
MIX HGT (KFT)...1.4 1.8 2.8 3.6 4.1 4.5 4.5 3.6  
MIXNG WIND DIR..SW SW SW SW SW SW S S  
MIXNG WIND SPD..10 13 15 16 17 18 18 17  
LVORI...........4 3 3 1 1 1 1 1  
ADI.............15 23 34 43 48 53 54 76  
VRATE MPH-FT/1K.13 23 41 59 71 82 83 63  
   
TONIGHT
 
 
SKY/WEATHER.........MOSTLY CLOUDY (75-85 PERCENT). CHANCE OF  
SHOWERS IN THE EVENING, THEN SHOWERS AND SLIGHT  
CHANCE OF THUNDERSTORMS OVERNIGHT.  
CWR (0.01 IN).......10 PERCENT INCREASING TO 40 PERCENT LATE IN  
THE EVENING INCREASING TO 70 PERCENT INCREASING  
OVERNIGHT TO 80 PERCENT AFTER 3 AM.  
MIN TEMPERATURE.....AROUND 65.  
MAX HUMIDITY........100 PERCENT.  
WIND (20 FT)........SOUTH WINDS 5 TO 6 MPH EARLY IN THE EVENING  
BECOMING LIGHT, THEN BECOMING SOUTH 5 TO 6 MPH  
OVERNIGHT. GUSTY AND ERRATIC WINDS EXPECTED  
NEAR THUNDERSTORMS OVERNIGHT.  
MIXING HEIGHT.......500 FT AGL.  
MIXING WINDS........SOUTH 6 TO 14 MPH.  
SMOKE DISPERSAL.....FAIR (17100 KNOT-FT) EARLY IN THE EVENING  
DECREASING TO POOR (2300 KNOT-FT) LATE IN THE  
NIGHT.  
LVORI...............6.  
ADI.................4 TO 26.  
 
TIME (EDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM  
SKY (%).........64 70 84 77 85 91 93 92 92 94 89 95  
WEATHER COV..... SCH CHC CHC CHC CHC LKY DEF LKY  
WEATHER TYPE.... RW RW RW RW RW RW RW RW  
TSTM COV........ SCH SCH SCH SCH  
CWR.............10 10 10 10 20 40 40 40 50 70 80 70  
TEMP............77 75 71 70 69 69 69 69 68 68 67 67  
RH..............67 72 79 83 84 85 88 89 91 94 96 100  
20 FT WIND DIR..S S S S S S S S S S S S  
20 FT WIND SPD..6 5 4 4 4 4 5 5 5 5 5 6  
20 FT WIND GUST.11 11 10 10 10 10 11 11 12 12 13 13  
MIX HGT (KFT)...1.5 0.5 0.5 0.5 0.5 0.5 0.6 0.6 0.5 0.6 0.6 0.5  
MIXNG WIND DIR..S S S S S S S S S S SW SW  
MIXNG WIND SPD..14 9 6 6 7 8 8 9 9 10 12 13  
LVORI...........3 3 4 5 5 5 5 6 5 6 6 8  
ADI.............26 6 4 4 4 5 6 6 6 7 8 8  
VRATE MPH-FT/1K.20 5 3 3 3 4 5 5 5 6 7 7  
   
WEDNESDAY
 
 
SKY/WEATHER.........CLOUDY (85-95 PERCENT) THEN BECOMING PARTLY  
SUNNY (55-65 PERCENT). SHOWERS IN THE MORNING.  
CHANCE OF THUNDERSTORMS THROUGH THE DAY.  
SHOWERS LIKELY IN THE AFTERNOON.  
CWR (0.01 IN).......80 PERCENT DECREASING TO 30 PERCENT.  
MAX TEMPERATURE.....AROUND 75.  
MIN HUMIDITY........76 PERCENT.  
WIND (20 FT)........SOUTHWEST WINDS 5 TO 6 MPH SHIFTING TO THE WEST  
AROUND 6 MPH LATE IN THE MORNING, THEN SHIFTING  
TO THE NORTH 6 TO 8 MPH IN THE AFTERNOON. GUSTY  
AND ERRATIC WINDS EXPECTED NEAR THUNDERSTORMS  
IN THE MORNING.  
MIXING HEIGHT.......4000 FT AGL.  
MIXING WINDS........SOUTHWEST 9 TO 12 MPH SHIFTING TO THE NORTH 12  
TO 18 MPH IN THE LATE MORNING AND AFTERNOON.  
SMOKE DISPERSAL.....POOR (4700 KNOT-FT) EARLY IN THE MORNING  
INCREASING TO EXCELLENT (62000 KNOT-FT) IN THE  
AFTERNOON.  
LVORI...............6.  
ADI.................8 EARLY IN THE MORNING INCREASING TO 50 IN THE  
AFTERNOON.  
 
TIME (EDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM  
SKY (%).........97 98 92 87 86 85 86 86 87 77 67 57  
WEATHER COV.....DEF LKY LKY LKY LKY LKY LKY LKY CHC CHC CHC CHC  
WEATHER TYPE....RW RW RW RW RW RW RW RW RW RW RW RW  
TSTM COV........SCH SCH CHC CHC CHC CHC CHC CHC  
CWR.............80 60 60 60 60 60 60 60 30 30 30 30  
TEMP............67 66 66 68 69 71 72 73 73 73 72 70  
RH..............99 100 100 100 98 95 92 87 83 81 78 77  
20 FT WIND DIR..SW SW SW SW W W W N N N N N  
20 FT WIND SPD..6 5 5 6 6 6 6 6 7 8 8 8  
20 FT WIND GUST.13 12 11 11 11 11 11 12 13 14 14 14  
MIX HGT (KFT)...0.6 0.5 0.8 1.2 1.6 2.4 2.6 3.3 3.8 4.0 3.9 3.9  
MIXNG WIND DIR..SW SW SW W NW N N N N N N N  
MIXNG WIND SPD..12 10 9 10 12 13 14 14 15 17 18 18  
LVORI...........8 7 8 5 5 4 4 4 4 3 3 3  
ADI.............8 11 8 16 23 35 40 48 41 46 50 50  
VRATE MPH-FT/1K.6 5 8 12 18 30 36 47 57 66 71 71  
 

 
 
FORECASTER...HANES  
REQUESTED BY...HC  
TYPE OF REQUEST...PRESCRIBED  
.TAG 2523050.1/RNK  
.DELDT 10/07/25  
.FORMATTERVERSION 2.0.0  
.EMAIL RICHARD.BURGESS@DOF.VIRGINIA.GOV,HARLEE.CRADDOCK@DOF.VIRGINIA.GOV  
 
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