905
FNUS71 KRNK 201144
FWSRNK
SPOT FORECAST FOR SPICE RUN RX...USFS
NATIONAL WEATHER SERVICE BLACKSBURG VA
744 AM EDT FRI MAR 20 2026
FORECAST IS BASED ON IGNITION TIME OF 0700 EDT ON MARCH 20.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
WARMER TODAY UNDER MOSTLY CLEAR SKIES. TEMPERATURES RISE INTO THE MID
TO UPPER 60S WITH RH VALUES FALLING INTO THE MID TO LOWER 30 PERCENT
RANGE. BETTER MIXING TODAY AND WINDS SLIGHTLY HIGHER, FROM THE SOUTHWEST.
AROUND 10MPH BY THIS AFTERNOON WITH GUSTS POSSIBLY INTO THE 20 MPH RANGE
AT TIMES. SHOULD SEE WINDS DECREASE SOME AFTER SUNSET...NOT AS GUSTY, BUT
COULD REMAIN SUSTAINED AROUND 10MPH OR LESS ON MORE EXPOSED RIDGES.
WARMER AGAIN ON SATURDAY WITH WINDS TRANSITIONING FROM THE WEST.
SLIGHTLY LESS WITH GUSTS AROUND 10MPH. MIN RH SLIGHTLY HIGHER, INTO
THE MID 30 PERCENT RANGE.
REST OF TODAY
SKY/WEATHER.........MOSTLY SUNNY (35-45 PERCENT) THEN BECOMING
MOSTLY CLOUDY (70-80 PERCENT). ISOLATED RAIN
SHOWERS LATE IN THE AFTERNOON.
CWR (0.01 IN).......10 PERCENT INCREASING TO 20 PERCENT LATE IN THE
AFTERNOON.
MAX TEMPERATURE.....AROUND 66.
MIN HUMIDITY........36 PERCENT.
WIND (20 FT)........LIGHT WINDS BECOMING SOUTHWEST 5 TO 7 MPH WITH
GUSTS TO AROUND 19 MPH IN THE AFTERNOON.
MIXING HEIGHT.......5100 FT AGL.
MIXING WINDS........WEST 2 TO 8 MPH INCREASING TO SOUTHWEST 25 TO
30 MPH.
SMOKE DISPERSAL.....POOR (600 KNOT-FT) EARLY IN THE MORNING
INCREASING TO EXCELLENT (78300 KNOT-FT) IN THE
AFTERNOON INCREASING TO EXCELLENT (102900
KNOT-FT) LATE IN THE AFTERNOON.
LVORI...............3.
ADI.................2 EARLY IN THE MORNING INCREASING TO 123 IN THE
AFTERNOON.
TIME (EDT) 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........35 20 26 36 44 60 73 80 82 72 80
WEATHER COV..... ISO
WEATHER TYPE.... RW
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 10 20
TEMP............37 38 42 50 56 60 62 65 65 65 65
RH..............78 75 68 55 49 41 39 36 36 37 37
20 FT WIND DIR..SW SW SW W SW SW W SW W W W
20 FT WIND SPD..2 2 2 2 4 5 6 6 7 7 6
20 FT WIND GUST.8 10 10 11 12 14 17 18 18 18 19
MIX HGT (KFT)...0.3 0.3 0.4 0.9 2.0 3.4 4.3 5.1 5.1 5.0 4.1
MIXNG WIND DIR..W W W W SW SW W W SW SW SW
MIXNG WIND SPD..2 3 6 8 12 16 21 25 28 30 29
LVORI...........4 4 3 2 2 1 1 1 1 1 1
ADI.............2 4 6 9 30 67 106 105 115 123 81
VRATE MPH-FT/1K.1 1 2 7 23 55 90 128 141 149 118
TONIGHT
SKY/WEATHER.........MOSTLY CLOUDY (65-75 PERCENT). SCATTERED RAIN
SHOWERS THROUGH THE NIGHT.
CWR (0.01 IN).......20 PERCENT INCREASING TO 30 PERCENT EARLY IN
THE EVENING, THEN DECREASING TO 20 PERCENT
EARLY IN THE EVENING INCREASING TO 30 PERCENT
LATE IN THE EVENING INCREASING TO 50 PERCENT
DECREASING TO 40 PERCENT OVERNIGHT DECREASING
TO 20 PERCENT DECREASING TO 10 PERCENT
OVERNIGHT.
MIN TEMPERATURE.....AROUND 51.
MAX HUMIDITY........90 PERCENT.
WIND (20 FT)........WEST WINDS 5 TO 6 MPH WITH GUSTS TO AROUND 19
MPH IN THE EVENING AND OVERNIGHT BECOMING
LIGHT.
MIXING HEIGHT.......500 FT AGL.
MIXING WINDS........SOUTHWEST 17 TO 25 MPH BECOMING WEST AROUND 3
MPH.
SMOKE DISPERSAL.....GOOD (45200 KNOT-FT) EARLY IN THE EVENING
DECREASING TO POOR (1700 KNOT-FT) LATE IN THE
NIGHT.
LVORI...............3.
ADI.................49 EARLY IN THE EVENING DECREASING TO 2 LATE IN
THE NIGHT.
TIME (EDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........78 86 84 58 55 69 65 59 62 61 66 61
WEATHER COV.....ISO SCT ISO SCT SCT SCT SCT ISO
WEATHER TYPE....RW RW RW RW RW RW RW RW
TSTM COV........
CWR.............20 30 20 30 30 50 40 20 10 0 0 0
TEMP............63 61 58 57 57 56 55 55 55 54 54 53
RH..............41 44 52 55 58 62 66 72 72 78 80 84
20 FT WIND DIR..SW W SW W SW W W W W W W W
20 FT WIND SPD..6 5 5 5 5 5 5 5 4 4 4 4
20 FT WIND GUST.19 18 18 18 17 17 17 16 16 14 14 14
MIX HGT (KFT)...2.1 0.8 0.7 0.6 0.5 0.5 0.5 0.6 0.6 0.6 0.6 0.6
MIXNG WIND DIR..SW SW SW SW SW SW W W W W W W
MIXNG WIND SPD..25 22 17 14 12 10 9 9 8 7 5 3
LVORI...........1 2 2 2 3 3 3 3 3 4 5 5
ADI.............49 15 12 9 8 7 6 6 5 5 3 2
VRATE MPH-FT/1K.52 18 12 8 6 5 5 6 5 4 3 2
SATURDAY
SKY/WEATHER.........MOSTLY CLOUDY (70-80 PERCENT) THEN BECOMING
MOSTLY SUNNY (35-45 PERCENT).
CWR (0.01 IN).......0 PERCENT.
MAX TEMPERATURE.....AROUND 69.
MIN HUMIDITY........37 PERCENT.
WIND (20 FT)........LIGHT WINDS.
MIXING HEIGHT.......5200 FT AGL.
MIXING WINDS........NORTHWEST 2 TO 10 MPH INCREASING TO 10 TO 13
MPH LATE IN THE MORNING.
SMOKE DISPERSAL.....POOR (1100 KNOT-FT) EARLY IN THE MORNING
INCREASING TO GOOD (46600 KNOT-FT) IN THE
AFTERNOON.
LVORI...............4.
ADI.................1 EARLY IN THE MORNING INCREASING TO 62 IN THE
AFTERNOON.
TIME (EDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........78 75 91 80 74 67 66 64 63 54 46 37
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
TEMP............53 52 51 53 56 59 62 65 67 68 69 68
RH..............87 89 90 85 77 67 57 49 43 39 37 37
20 FT WIND DIR..W W W W W NW NW NW NW NW W W
20 FT WIND SPD..3 3 2 2 3 3 4 4 4 4 4 4
20 FT WIND GUST.13 12 12 11 11 11 11 10 10 11 11 11
MIX HGT (KFT)...0.5 0.5 0.5 1.0 1.4 1.8 2.3 2.9 3.5 4.0 4.6 5.2
MIXNG WIND DIR..W W W NW NW NW NW NW NW NW W W
MIXNG WIND SPD..2 2 3 7 10 13 13 12 10 10 10 10
LVORI...........6 7 6 4 3 3 1 1 1 1 1 1
ADI.............1 2 4 9 19 29 36 41 36 39 56 62
VRATE MPH-FT/1K.1 1 2 7 15 22 29 33 36 42 48 54
FORECASTER...GRUVER
REQUESTED BY...A CHRISTIE
TYPE OF REQUEST...PRESCRIBED
.TAG 2606722.0/RNK
.DELDT 03/20/26
.FORMATTERVERSION 2.0.0
.EMAIL ADAM.CHRISTIE@USDA.GOV,MATHIAS.CUISON@USDA.GOV
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