510
FNUS73 KUNR 181506
FWSUNR

Spot Forecast for Route Four Nine...Bureau of Indian Affairs
National Weather Service Rapid City SD
906 AM MDT Mon Aug 18 2025

Forecast is based on forecast start time of 1000 MDT on August 18.
If conditions become unrepresentative, contact the National Weather
Service.

.DISCUSSION...

Dry conditions are expected over the spot area today. Some storms
may develop this afternoon and evening, however are expected to
remain north of the spot location. Conditions are expected to
dry out and turn hot come Tuesday through Thursday. Wednesday will
be the driest day, with min RH values around 20 percent over the
spot location. A cold front will move through late Thursday which
will bring cooler conditions and chances for precipitation back
to the region for the weekend.

.REST OF TODAY...

Sky/weather.........Sunny (15-25 percent).
Max temperature.....Around 92.
Min humidity........25 percent.
Wind (20 ft)........East winds around 10 mph shifting to the south
                    with gusts to around 13 mph early in the
                    afternoon, then increasing to south around 10
                    mph with gusts to around 17 mph late in the
                    afternoon.
CWR.................0 percent.
Mixing height.......9100 to 9600 ft agl.
Transport winds.....South around 10 mph shifting to the north 15 to
                    20 mph late in the afternoon.
Smoke dispersal.....Good increasing to very good late in the
                    afternoon.

TIME (MDT)      10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........13  11  9   16  22  29  31  34
Weather cov.....
Weather type....
Tstm cov........
CWR.............0   0   0   0   0   0   0   0
Temp............79  82  88  90  91  92  92  90
RH..............44  40  33  30  28  26  25  27
20 FT wind dir..E   E   SE  SE  S   SW  S   S
20 FT wind spd..6   6   6   6   7   7   8   9
20 FT wind gust.9   9   9   10  13  14  14  15
Mix hgt (kft)...2.1 3.4 4.8 5.8 7.4 9.6 9.5 7.3
Transp wind dir.S   SE  SE  E   NE  N   N   NE
Transp wind spd.9   9   10  12  14  16  16  17

.TONIGHT...

Sky/weather.........Mostly clear (15-25 percent). Slight chance of
                    showers and thunderstorms early in the evening.
Min temperature.....Around 61.
Max humidity........90 percent.
Wind (20 ft)........Southeast winds around 10 mph with gusts to
                    around 18 mph shifting to the south with gusts
                    to around 12 mph overnight. Gusty and erratic
                    winds expected near thunderstorms early in the
                    evening.
CWR.................0 percent.
Mixing height.......400 to 900 ft agl.
Transport winds.....East around 20 mph shifting to the southwest 10
                    to 15 mph overnight.
Smoke dispersal.....Poor.

TIME (MDT)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........36  25  25  25  28  27  21  14  10  8   9   14
Weather cov.....SCH SCH SCH
Weather type....RW  RW  RW
Tstm cov........SCH SCH SCH
CWR.............0   0   0   0   0   0   0   0   0   0   0   0
Temp............88  85  79  75  73  71  70  68  67  64  63  63
RH..............33  40  50  60  66  71  73  78  75  84  90  90
20 FT wind dir..SE  E   SE  SE  SE  SE  S   S   S   S   S   S
20 FT wind spd..9   10  10  10  9   8   7   6   6   6   6   6
20 FT wind gust.15  18  17  16  16  14  13  12  12  12  10  9
Mix hgt (kft)...4.1 1.0 0.7 0.5 0.5 0.5 0.5 0.5 0.4 0.4 0.4 0.4
Transp wind dir.NE  E   E   SE  SE  S   S   S   SW  SW  SW  SW
Transp wind spd.17  18  18  18  18  18  17  15  13  12  10  9

.TUESDAY...

Sky/weather.........Sunny (5-15 percent).
Max temperature.....Around 94.
Min humidity........25 percent.
Wind (20 ft)........South winds 5 to 10 mph shifting to the east 10
                    to 15 mph late in the morning.
CWR.................0 percent.
Mixing height.......9200 to 9700 ft agl.
Transport winds.....Southwest around 10 mph shifting to the east 10
                    to 20 mph late in the morning.
Smoke dispersal.....Very good.

TIME (MDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........19  15  7   1   1   2   2   4   5   7   8   8
Weather cov.....
Weather type....
Tstm cov........
CWR.............0   0   0   0   0   0   0   0   0   0   0   0
Temp............61  64  68  75  81  86  89  92  93  93  93  91
RH..............90  84  76  60  47  39  34  29  26  25  25  27
20 FT wind dir..S   S   SW  SW  S   E   NE  E   E   E   E   E
20 FT wind spd..6   5   5   5   5   6   7   8   9   10  12  13
20 FT wind gust.9   9   9   9   10  12  13  14  15  16  17  18
Mix hgt (kft)...0.4 0.7 1.0 1.2 2.3 3.4 4.4 6.2 7.9 9.7 7.9 6.1
Transp wind dir.SW  SW  SW  SW  S   SE  E   E   E   E   E   E
Transp wind spd.9   8   8   8   9   10  12  13  15  16  17  18

$$
Forecaster...AD
Requested by...Justin Bauer
Type of request...WILDFIRE
.TAG 2519978.2/UNR
.DELDT 08/18/25
.FormatterVersion 2.0.0
.EMAIL justin.bauer@bia.gov