477
FNUS71 KRNK 011922
FWSRNK

Spot Forecast for Grayson Highlands State Park RX Burn...DCR/Virginia State Parks
National Weather Service Blacksburg VA
322 PM EDT Tue Apr 1 2025

Forecast is based on ignition time of 1500 EDT on April 01.
If conditions become unrepresentative, contact the National Weather
Service.

.DISCUSSION...
Expect plenty of sunshine the rest of the afternoon, with RH dropping
to 35 percent. 20 foot and mixing winds will be light so smoke
dispersion will be poor.

Clouds increase late tonight. Cannot rule out a light shower
or drizzle Thursday, but overall dry weather is expected.

20 foot wind will turn southeast to south Wednesday and increase
to 8 to 12 mph in the afternoon with gusts to 20-25 mph. May
see some sunshine after 2pm Wednesday.

.REST OF THIS AFTERNOON...

Sky/weather.........Mostly sunny (25-35 percent).
CWR (0.01 in).......0 percent.
Max temperature.....Around 58.
Min humidity........36 percent.
Wind (20 ft)........Light winds.
Mixing height.......3800 ft AGL.
Mixing winds........West 2 to 3 mph becoming around 2 mph late in
                    the afternoon.
Smoke dispersal.....Poor (6700 knot-ft).
LVORI...............2.
ADI.................9 to 16.

TIME (EDT)      3PM 4PM 5PM
Sky (%).........25  29  33
Weather cov.....
Weather type....
Tstm cov........
CWR.............0   0   0
Temp............56  57  57
RH..............40  38  36
20 FT wind dir..W   W   SW
20 FT wind spd..3   4   4
20 FT wind gust.5   6   6
Mix hgt (kft)...3.3 3.8 3.8
Mixng wind dir..NW  W   W
Mixng wind spd..3   2   2
LVORI...........2   2   2
ADI.............9   10  16
VRate mph-ft/1K.8   9   13

.TONIGHT...

Sky/weather.........Partly cloudy (20-30 percent).
CWR (0.01 in).......10 percent.
Min temperature.....Around 42.
Max humidity........88 percent.
Wind (20 ft)........Light winds becoming south 5 to 6 mph.
Mixing height.......400 ft AGL.
Mixing winds........South 2 to 3 mph increasing to southeast 15 to
                    20 mph.
Smoke dispersal.....Fair (16800 knot-ft) early in the evening
                    decreasing to poor (3200 knot-ft) late in the
                    night.
LVORI...............3.
ADI.................3 to 24.

TIME (EDT)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........22  12  2   11  21  31  30  29  27  35  42  50
Weather cov.....
Weather type....
Tstm cov........
CWR.............0   0   0   10  10  10  10  10  0   10  10  10
Temp............55  53  50  48  47  45  44  44  44  44  44  43
RH..............40  45  52  58  63  68  72  73  75  76  78  81
20 FT wind dir..SW  S   SE  SE  S   S   S   S   S   S   S   S
20 FT wind spd..4   4   4   5   5   6   6   6   6   6   6   6
20 FT wind gust.6   6   6   7   8   10  10  10  10  10  8   10
Mix hgt (kft)...3.4 2.0 0.5 0.4 0.5 0.4 0.4 0.4 0.4 0.4 0.4 0.6
Mixng wind dir..SW  S   SE  SE  SE  SE  SE  SE  SE  SE  S   S
Mixng wind spd..2   3   5   7   9   12  13  14  15  16  18  20
LVORI...........2   2   2   3   3   3   3   3   4   4   4   4
ADI.............24  3   4   5   5   5   6   6   6   7   12  13
VRate mph-ft/1K.19  14  5   4   5   5   5   5   6   6   8   12

.WEDNESDAY...

Sky/weather.........Mostly cloudy (70-80 percent). Slight chance of
                    rain showers in the late morning and afternoon.
CWR (0.01 in).......10 percent increasing to 20 percent in the late
                    morning and afternoon.
Max temperature.....Around 62.
Min humidity........64 percent.
Wind (20 ft)........South winds 6 to 10 mph. Gusts up to 25 mph in
                    the late morning and afternoon.
Mixing height.......1100 ft AGL.
Mixing winds........South 17 to 20 mph.
Smoke dispersal.....Poor (7300 knot-ft) early in the morning
                    increasing to fair (18700 knot-ft) in the
                    afternoon.
LVORI...............3.
ADI.................13 to 27.

TIME (EDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........61  72  84  83  82  81  78  76  73  72  71  70
Weather cov.....                SCH SCH SCH SCH SCH SCH SCH SCH
Weather type....                RW  RW  RW  RW  RW  RW  RW  RW
Tstm cov........
CWR.............10  10  10  10  20  20  20  20  20  20  20  20
Temp............43  42  45  48  51  54  55  57  58  59  60  62
RH..............86  88  84  80  76  73  71  70  67  67  65  64
20 FT wind dir..S   S   S   S   S   S   S   S   S   S   S   S
20 FT wind spd..6   6   6   6   7   7   8   9   10  9   9   8
20 FT wind gust.10  10  11  17  18  18  19  20  20  20  20  19
Mix hgt (kft)...0.6 0.5 0.5 0.7 0.8 1.0 1.0 1.0 1.1 1.1 1.0 0.9
Mixng wind dir..S   S   S   S   S   S   S   S   S   S   S   S
Mixng wind spd..20  20  20  20  18  18  18  20  20  20  18  17
LVORI...........4   4   4   3   3   3   3   3   3   3   3   2
ADI.............13  20  20  21  21  26  26  25  26  27  25  22
VRate mph-ft/1K.11  9   8   13  15  20  20  20  21  22  19  16

$$
Forecaster...Perry
Requested by...Jordon Blevins
Type of request...PRESCRIBED
.TAG 2508609.0/RNK
.DELDT 04/01/25
.FormatterVersion 2.0.0
.EMAIL jordon.blevins@dcr.virginia.gov