441
FNUS73 KUNR 132010
FWSUNR

Spot Forecast for Rancher Wildfire...BIA
National Weather Service Rapid City SD
210 PM MDT Thu Aug 13 2026

Forecast is based on forecast start time of 1400 MDT on August 13.
If conditions become unrepresentative, contact the National Weather
Service.

.DISCUSSION...A disturbance crossing the region will bring
chances for showers and thunderstorms this afternoon and tonight.
Severe weather is not expected. Temperatures will remain in the
60s to around 70 this afternoon. Tonight will see lows around 60
degrees. Cloudy skies and patchy fog are expected today and
possibly tonight. Northeasterly winds today will gradually shift
to the east tonight, then southerly on Friday. Some clouds will
persist into Friday, but, as of now, precipitation is not
expected. Friday will see high temperatures around 85 degrees.

.REST OF TODAY...

Sky/weather.........Cloudy (90-100 percent). Areas of fog early in
                    the afternoon. Chance of showers and slight
                    chance of thunderstorms through the day.
Max temperature.....Around 70.
Min humidity........72 percent.
Wind (20 ft)........Northeast winds around 10 mph with gusts to around
                    20 mph. Gusty and erratic winds expected near
                    thunderstorms.
CWR.................30 percent.
Mixing height.......2000 to 2500 ft agl.
Transport winds.....East around 25 mph.
Smoke dispersal.....Fair.

TIME (MDT)      2PM 3PM 4PM 5PM
Sky (%).........97  97  96  96
Weather cov.....CHC CHC CHC CHC
Weather type....RNF RW  RW  RW
Tstm cov........SCH SCH SCH SCH
CWR.............30  30  30  30
Temp............68  69  69  69
RH..............78  73  72  74
20 FT wind dir..NE  NE  NE  NE
20 FT wind spd..10  10  10  10
20 FT wind gust.20  20  18  17
Mix hgt (kft)...2.1 2.4 2.5 2.5
Transp wind dir.E   E   E   E
Transp wind spd.22  22  22  21

.TONIGHT...

Sky/weather.........Cloudy (90-100 percent). Slight chance of
                    thunderstorms early in the evening. Chance of
                    showers through the night.
Min temperature.....Around 61.
Max humidity........100 percent.
Wind (20 ft)........Southeast winds 5 to 10 mph with gusts to
                    around 18 mph. Gusty and erratic winds expected
                    near thunderstorms early in the evening.
CWR.................30 percent.
Mixing height.......600 to 1100 ft agl.
Transport winds.....Southeast 15 to 20 mph.
Smoke dispersal.....Poor.

TIME (MDT)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........96  95  95  96  95  96  97  97  97  98  98  95
Weather cov.....CHC CHC CHC CHC CHC CHC CHC CHC CHC CHC CHC CHC
Weather type....RW  RW  RW  RW  RW  RW  RW  RW  RW  RW  RW  RW
Tstm cov........SCH SCH SCH
CWR.............30  30  30  30  30  30  30  30  30  30  30  30
Temp............69  68  67  66  64  64  64  63  63  63  62  61
RH..............78  84  87  90  97  100 97  100 100 100 100 100
20 FT wind dir..NE  E   E   E   E   SE  SE  E   SE  SE  SE  SE
20 FT wind spd..10  10  10  10  9   9   8   8   7   7   7   7
20 FT wind gust.18  17  18  17  18  17  16  16  15  15  14  14
Mix hgt (kft)...2.4 1.9 1.3 1.0 1.3 1.1 1.0 1.2 1.0 0.8 0.6 0.7
Transp wind dir.E   E   E   E   E   SE  SE  SE  SE  SE  SE  SE
Transp wind spd.20  20  18  18  17  16  15  14  14  13  13  12

.FRIDAY...

Sky/weather.........Mostly cloudy (75-85 percent) then becoming
                    mostly sunny (25-35 percent).
Max temperature.....Around 85.
Min humidity........45 percent.
Wind (20 ft)........Southeast winds around 10 mph shifting to the
                    west late in the afternoon. Gusts up to 17 mph.
CWR.................0 percent.
Mixing height.......5100 to 5600 ft agl.
Transport winds.....South around 15 mph shifting to the west late
                    in the afternoon.
Smoke dispersal.....Good.

TIME (MDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........82  80  49  42  36  25  29  18  16  25  23  11
Weather cov.....
Weather type....
Tstm cov........
CWR.............0   0   0   0   0   0   0   0   0   0   0   0
Temp............62  63  66  69  72  75  79  81  83  84  85  85
RH..............93  97  93  90  84  69  58  55  51  46  46  45
20 FT wind dir..SE  SE  S   S   S   S   S   SW  SW  W   W   W
20 FT wind spd..7   7   7   8   8   9   8   8   8   8   8   9
20 FT wind gust.13  13  14  15  16  14  15  15  15  16  16  17
Mix hgt (kft)...0.7 0.8 1.5 1.9 2.5 3.3 3.9 4.5 5.1 5.6 5.2 4.7
Transp wind dir.SE  SE  S   S   S   SW  SW  SW  W   W   W   W
Transp wind spd.12  13  13  14  14  14  14  14  15  15  15  15

$$
Forecaster...CS
Requested by...Glenn/IC4 Trainee
Type of request...WILDFIRE
.TAG 2619631.0/UNR
.DELDT 08/13/26
.FormatterVersion 2.0.0
.EMAIL g.jealousofhim@bia.gov