559
FNUS71 KRNK 071329
FWSRNK
SPOT FORECAST FOR GRASSY HILL NAP UNIT 2...VA DCR
NATIONAL WEATHER SERVICE BLACKSBURG VA
829 AM EST WED JAN 7 2026
FORECAST IS BASED ON IGNITION TIME OF 0900 EST ON JANUARY 08.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
A WEAK COLD FRONT IS PUSHING THROUGH THE AREA THIS MORNING, THOUGH NO
RAIN IS EXPECTED. WINDS SHIFT TO THE NORTHWEST THIS AFTERNOON AS SKIES
CLEAR OUT, AND INCREASE TO 10-15 MPH WITH GUSTS OF 20-30 MPH LIKELY.
THESE WINDS ARE SHORT-LIVED, AS GUSTS DECREASE TO UNDER 10 MPH BY SUNSET.
HIGH PRESSURE KEEPS CONDITIONS DRY FOR THURSDAY, WITH NO CHANCE OF RAIN.
WINDS REMAIN LIGHT, WITH GUSTS OF 10-15 MPH BRIEFLY THURSDAY AFTERNOON,
AS CLOUDS INCREASE. MINRH VALUES ON THURSDAY WILL BE AROUND 40%.
TEMPERATURES WILL BE MILD, IN THE LOW 60S FOR HIGHS. FRIDAY WILL BE EVEN
WARMER, IN THE UPPER 60S, AS WINDS TURN SOUTHWEST AND INCREASE TO AROUND
10-15 MPH, GUSTING TO 20-25 MPH IN THE AFTERNOON. MINRH VALUES RISE AS
MOISTURE MOVES IN, TO AROUND 70%. THERE WILL BE A CHANCE OF SHOWERS FRIDAY
AFTERNOON, THOUGH THEY WILL BE SCATTERED AND LIGHT. CLOUD COVER WILL BE
HEAVY THROUGHOUT THE DAY.
THURSDAY
SKY/WEATHER.........MOSTLY SUNNY (45-55 PERCENT) THEN BECOMING
MOSTLY CLOUDY (70-80 PERCENT).
CWR (0.01 IN).......0 PERCENT.
MAX TEMPERATURE.....AROUND 59.
MIN HUMIDITY........44 PERCENT.
WIND (20 FT)........LIGHT WINDS BECOMING SOUTHEAST AROUND 5 MPH
LATE IN THE AFTERNOON, THEN BECOMING LIGHT LATE
IN THE AFTERNOON.
MIXING HEIGHT.......2000 FT AGL.
MIXING WINDS........NORTHEAST AROUND 3 MPH SHIFTING TO THE
SOUTHEAST 2 TO 3 MPH IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR (1300 KNOT-FT).
LVORI...............3.
ADI.................4 TO 6.
TIME (EST) 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........30 35 38 43 49 55 62 69 75
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0
TEMP............42 47 51 54 55 57 58 58 56
RH..............75 62 54 49 47 45 44 46 50
20 FT WIND DIR..S E E SE SE SE SE SE SE
20 FT WIND SPD..1 2 3 4 5 5 5 5 4
20 FT WIND GUST.2 5 6 7 8 8 8 7
MIX HGT (KFT)...0.4 0.7 1.1 1.6 2.0 1.8 1.7 1.6 1.2
MIXNG WIND DIR..N N NE E SE SE SE SE SE
MIXNG WIND SPD..3 3 3 2 2 2 3 3 3
LVORI...........4 3 2 2 2 2 2 2 2
ADI.............4 4 4 5 6 5 6 6 5
VRATE MPH-FT/1K.1 2 3 4 4 5 5 5 4
THURSDAY NIGHT
SKY/WEATHER.........MOSTLY CLOUDY (80-90 PERCENT).
CWR (0.01 IN).......10 PERCENT.
MIN TEMPERATURE.....AROUND 48.
MAX HUMIDITY........88 PERCENT.
WIND (20 FT)........LIGHT WINDS BECOMING SOUTH AROUND 5 MPH AFTER 3
AM.
MIXING HEIGHT.......400 FT AGL.
MIXING WINDS........EAST 1 TO 2 MPH SHIFTING TO THE SOUTHEAST 5 TO
6 MPH.
SMOKE DISPERSAL.....POOR (500 KNOT-FT).
LVORI...............4.
ADI.................1 TO 4.
TIME (EST) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........79 81 80 77 75 74 75 78 83 87 91 92
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 10 10 10 10 10
TEMP............54 52 50 50 50 50 49 49 49 50 50 50
RH..............55 61 65 67 69 71 73 75 75 76 77 80
20 FT WIND DIR..SE SE SE SE S S S S S S S S
20 FT WIND SPD..4 4 4 4 4 4 4 4 4 4 5 5
20 FT WIND GUST.6 6 6 6 6 6 6 6 6 7 7 8
MIX HGT (KFT)...0.8 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.4 0.4 0.5
MIXNG WIND DIR..E E E NE NE E SE SE SE S S S
MIXNG WIND SPD..2 2 1 1 1 2 5 6 6 6 6 5
LVORI...........3 3 3 4 4 3 3 4 4 4 4 5
ADI.............2 2 1 1 1 2 3 4 4 4 4 3
VRATE MPH-FT/1K.2 1 1 1 1 1 2 3 3 3 3 2
FRIDAY
SKY/WEATHER.........CLOUDY (85-95 PERCENT). SLIGHT CHANCE OF RAIN
IN THE MORNING. CHANCE OF RAIN IN THE
AFTERNOON.
CWR (0.01 IN).......10 PERCENT INCREASING TO 30 PERCENT.
MAX TEMPERATURE.....AROUND 65.
MIN HUMIDITY........71 PERCENT.
WIND (20 FT)........SOUTH WINDS 6 TO 10 MPH. GUSTS UP TO 22 MPH
LATE IN THE MORNING.
MIXING HEIGHT.......2100 FT AGL.
MIXING WINDS........SOUTH 3 TO 12 MPH INCREASING TO 10 TO 13 MPH
LATE IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR (1500 KNOT-FT) EARLY IN THE MORNING
INCREASING TO FAIR (21600 KNOT-FT) IN THE
AFTERNOON.
LVORI...............5.
ADI.................4 TO 24.
TIME (EST) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........92 91 90 88 87 87 87 87 88 90 93 94
WEATHER COV..... SCH SCH SCH SCH SCH SCH CHC CHC CHC CHC CHC
WEATHER TYPE.... RN RN RN RN RN RN RN RN RN RN RN
TSTM COV........
CWR.............10 20 20 20 20 20 20 30 30 30 30 30
TEMP............50 50 51 53 54 56 58 60 62 63 64 64
RH..............83 86 88 88 87 85 82 79 75 72 71 72
20 FT WIND DIR..S S S S S S S S S SW SW SW
20 FT WIND SPD..6 6 6 7 8 8 9 10 10 10 9 9
20 FT WIND GUST.10 10 11 13 14 16 17 18 18 18 17 16
MIX HGT (KFT)...0.5 0.5 0.7 0.9 1.1 1.4 1.8 2.1 2.1 2.0 1.9 1.5
MIXNG WIND DIR..SE SE S S S S S S S S S S
MIXNG WIND SPD..3 3 5 6 8 9 10 12 13 13 12 10
LVORI...........5 6 5 5 5 4 3 3 3 3 3 3
ADI.............4 4 5 7 11 15 19 23 24 23 22 16
VRATE MPH-FT/1K.2 2 3 6 9 14 19 24 25 24 22 15
FORECASTER...BURROUGHS
REQUESTED BY...TYLER URGO
TYPE OF REQUEST...PRESCRIBED
.TAG 2528479.0/RNK
.DELDT 01/07/26
.FORMATTERVERSION 2.0.0
.EMAIL TYLER.URGO@DCR.VIRGINIA.COM
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