Text Products for FWS Issued by RNK

Spot Forecast
Issued by NWS Blacksburg, VA
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FNUS71 KRNK 220930
FWSRNK

Spot Forecast for Tri-County...USFS
National Weather Service Blacksburg VA
530 AM EDT Mon Apr 22 2024

Forecast is based on ignition time of 0800 EDT on April 22.
If conditions become unrepresentative, contact the National Weather
Service.

.DISCUSSION...
Dry today with plenty of sunshine. RH drops to around 25
percent this afternoon. 20 foot wind will be light,
mainly from the north or terrain driven.

Tuesday about the same, slightly warmer, and a few clouds
in the afternoon. RH drops to near 25 percent once again.
However, surface winds will start to come around to the
southwest by midday, though mixing/smoke dispersion will be
excellent by afternoon.

.TODAY...

Sky/weather.........Sunny (0-10 percent).
CWR (0.01 in).......0 percent.
Max temperature.....Around 58.
Min humidity........25 percent.
Wind (20 ft)........North winds 5 to 6 mph.
Mixing height.......6700 ft AGL.
Mixing winds........North 5 to 10 mph.
Smoke dispersal.....Poor (6200 knot-ft) early in the morning
                    increasing to good (48500 knot-ft) in the
                    afternoon.
LVORI...............2.
ADI.................9 early in the morning increasing to 64 in the
                    afternoon.
Haines Index........4 to 5 or low to moderate potential for large
                    plume dominated fire growth.

TIME (EDT)      8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........2   1   1   1   3   6   8   9   10  10
Weather cov.....
Weather type....
Tstm cov........
CWR.............0   0   0   0   0   0   0   0   0   0
Temp............35  39  43  47  50  52  54  56  57  57
RH..............70  53  44  38  33  30  28  26  25  26
20 FT wind dir..N   N   N   NE  N   N   N   NW  NW  NW
20 FT wind spd..6   6   6   6   6   6   5   5   5   5
20 FT wind gust.10  10  10  10  8   8   8   10  10  10
Mix hgt (kft)...1.2 2.3 3.3 4.4 5.4 5.9 6.3 6.7 6.7 6.6
Mixng wind dir..N   N   N   NE  N   N   NW  NW  NW  NW
Mixng wind spd..6   7   9   10  9   7   5   5   6   7
LVORI...........3   2   1   1   1   1   1   1   1   1
ADI.............9   29  47  64  60  46  40  45  57  64
Haines index....4   4   4   4   4   5   5   5   5   5
VRate mph-ft/1K.7   24  40  56  54  43  34  38  48  55

.TONIGHT...

Sky/weather.........Mostly clear (5-15 percent).
CWR (0.01 in).......0 percent.
Min temperature.....Around 39.
Max humidity........57 percent.
Wind (20 ft)........Northwest winds around 5 mph in the evening and
                    overnight becoming light.
Mixing height.......400 ft AGL.
Mixing winds........West 2 to 6 mph.
Smoke dispersal.....Good (37400 knot-ft) early in the evening
                    decreasing to poor (900 knot-ft) late in the
                    night.
LVORI...............2.
ADI.................51 early in the evening decreasing to 1 late in
                    the night.
Haines Index........4 to 5 or low to moderate potential for large
                    plume dominated fire growth.

TIME (EDT)      6 PM   8 PM   10 PM  MIDNGT 2 AM   4 AM
Sky (%).........10     9      4      5      12     14
Weather cov.....
Weather type....NONE   NONE   NONE   NONE   NONE   NONE
Tstm cov........
CWR.............0      0      0      0      0      0
Temp............56     50     47     45     43     41
RH..............27     35     40     43     48     50
20 ft wind......NW 5   NW 5   NW 5   W 5    W 4    W 4
20 ft wind gust.8      8      8      8      6      6
Mix hgt (ft)....6600   2500   700    500    400    400
Mixing wind......W 6    W 3    W 2    W 2    NW 2   NW 3
LVORI...........1      2      2      2      2      2
ADI.............51     2      1      1      1      1
Haines index....5      5      5      5      4      4
VRate mph-ft/1K.43     3      2      1      1      1

.TUESDAY...

Sky/weather.........Sunny (20-30 percent) then becoming mostly
                    sunny (30-40 percent).
CWR (0.01 in).......0 percent.
Max temperature.....Around 66.
Min humidity........26 percent.
Wind (20 ft)........Light winds becoming southwest 5 to 10 mph with
                    gusts to around 18 mph in the late morning and
                    afternoon.
Mixing height.......5400 ft AGL.
Mixing winds........West 1 to 9 mph shifting to the southwest 13 to
                    16 mph late in the morning.
Smoke dispersal.....Poor (300 knot-ft) early in the morning
                    increasing to excellent (86500 knot-ft) in the
                    afternoon.
LVORI...............2.
ADI.................1 early in the morning increasing to 101 in the
                    afternoon.
Haines Index........4 to 5 or low to moderate potential for large
                    plume dominated fire growth.

TIME (EDT)      6 AM   8 AM   10 AM  NOON   2 PM   4 PM
Sky (%).........19     29     35     48     19     13
Weather cov.....
Weather type....NONE   NONE   NONE   NONE   NONE   NONE
Tstm cov........
CWR.............0      0      0      0      0      0
Temp............41     42     52     58     63     66
RH..............53     57     42     34     28     26
20 ft wind......W 4    W 4    SW 5   SW 6   SW 7   SW 9
20 ft wind gust.6      6      8      11     14     17
Mix hgt (ft)....400    500    2000   3500   4700   5400
Mixing wind......NW 2   W 1    W 9    SW 14  SW 15  SW 16
LVORI...........2      3      2      1      1      1
ADI.............1      1      27     71     92     73
Haines index....4      4      4      4      5      5
VRate mph-ft/1K.1      1      21     59     80     97

$$
Forecaster...Perry
Requested by...Chris Schultz
Type of request...PRESCRIBED
.TAG 2410777.9/RNK
.DELDT 04/22/24
.FormatterVersion 2.0.0
.EMAIL christopher.schultz@usda.gov
National Weather Service Weather Forecast Office
