346
FNUS71 KRNK 100815
FWSRNK
SPOT FORECAST FOR HALL SITE PREP BURN...VDOF
NATIONAL WEATHER SERVICE BLACKSBURG VA
415 AM EDT WED SEP 10 2025
FORECAST IS BASED ON IGNITION TIME OF 1400 EDT ON SEPTEMBER 10.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
EXPECT A MIX OF SUN AND CLOUDS THIS AFTERNOON OVER THE BURN SITE, WHICH
COULD IMPACT MIXING SOMEWHAT, WITH CLOUD BASES IN THE 4 TO 6 THOUSAND
FOOT RANGE. OTHERWISE, MIN RH SHOULD DROP TO NEAR 50 PERCENT AND
MIXING WINDS WILL BE FROM THE NORTH-NORTHEAST AROUND 10 MPH. INVERSION
KICKS BACK IN BETWEEN 630PM AND 8PM.
THIS AFTERNOON
SKY/WEATHER.........PARTLY SUNNY (55-65 PERCENT).
CWR (0.01 IN).......10 PERCENT.
MAX TEMPERATURE.....AROUND 78.
MIN HUMIDITY........50 PERCENT.
WIND (20 FT)........NORTHEAST WINDS 6 TO 9 MPH.
MIXING HEIGHT.......3800 FT AGL.
MIXING WINDS........NORTH 8 TO 11 MPH.
SMOKE DISPERSAL.....FAIR (27500 KNOT-FT).
LVORI...............2.
ADI.................24 TO 32.
TIME (EDT) 2PM 3PM 4PM 5PM
SKY (%).........64 62 60 58
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............10 10 10 10
TEMP............76 77 76 74
RH..............55 51 53 58
20 FT WIND DIR..N N NE NE
20 FT WIND SPD..7 7 7 6
20 FT WIND GUST.13 13 13 12
MIX HGT (KFT)...3.6 3.8 3.6 3.5
MIXNG WIND DIR..N N N N
MIXNG WIND SPD..9 8 9 9
LVORI...........1 1 1 2
ADI.............32 31 31 24
VRATE MPH-FT/1K.33 33 32 32
TONIGHT
SKY/WEATHER.........PARTLY TO MOSTLY CLOUDY (45-65 PERCENT).
CWR (0.01 IN).......0 PERCENT.
MIN TEMPERATURE.....AROUND 55.
MAX HUMIDITY........96 PERCENT.
WIND (20 FT)........NORTHEAST WINDS 5 TO 6 MPH EARLY IN THE EVENING
BECOMING LIGHT.
MIXING HEIGHT.......400 FT AGL.
MIXING WINDS........NORTH 7 TO 12 MPH.
SMOKE DISPERSAL.....FAIR (24700 KNOT-FT) EARLY IN THE EVENING
DECREASING TO POOR (2500 KNOT-FT) LATE IN THE
NIGHT.
LVORI...............5.
ADI.................3 TO 23.
TIME (EDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........54 50 45 51 57 63 64 65 66 65 64 63
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
TEMP............73 71 68 64 62 61 60 60 59 59 58 58
RH..............63 68 77 87 93 95 96 95 94 93 93 93
20 FT WIND DIR..NE NE NE NE NE NE NE N N N N N
20 FT WIND SPD..6 5 4 3 4 4 3 3 3 3 3 3
20 FT WIND GUST.10 8 6 5 6 6 5 5 4 4 4 5
MIX HGT (KFT)...2.8 1.1 0.7 0.7 0.6 0.6 0.5 0.5 0.5 0.5 0.5 0.4
MIXNG WIND DIR..N N NE NE N N N N N N N N
MIXNG WIND SPD..10 10 12 12 10 10 10 9 9 8 8 7
LVORI...........2 3 4 5 6 6 7 7 6 6 6 6
ADI.............23 7 8 5 7 7 4 4 4 4 3 3
VRATE MPH-FT/1K.28 12 9 8 6 6 5 5 4 4 4 3
FORECASTER...PERRY
REQUESTED BY...BJ BUTLER
TYPE OF REQUEST...PRESCRIBED
.TAG 2521664.0/RNK
.DELDT 09/10/25
.FORMATTERVERSION 2.0.0
.EMAIL BJ.BUTLER@DOF.VIRGINIA.GOV
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