537
FNUS73 KUNR 091632
FWSUNR

Spot Forecast for Potato Creek...USWFS - SD-PRA
National Weather Service Rapid City SD
1032 AM MDT Sun Aug 9 2026

Forecast is based on forecast start time of 1124 MDT on August 09.
If conditions become unrepresentative, contact the National Weather
Service.

.DISCUSSION...Elevated fire weather conditions are likely today.
Humidities will drop to around 25 to 30% this afternoon. Westerly
winds will be sustained at around 10 to 20 mph with gusts near 20
to 25 mph. Temperatures will top out near 90 degrees.

Tonight, winds will be out of the south to southwest at 10 to 15
mph. Overnight humidities will recover to over 80%.

Tomorrow, winds will start out of the south before swinging to the
the west around midday. 10 to 15 mph winds throughout the day,
gusts near 20 mph possible in the afternoon. Temperatures will
reach the mid 90s with humidity dropping to near 30%. Tomorrow has
a chance for showers and thunderstorms, mainly after 5PM, though
the better chances for precip are farther to the east.

Cooler weather and more chances for rain are likely later this
week.


.REST OF TODAY...

Sky/weather.........Mostly sunny (25-35 percent). Areas of smoke
                    late in the afternoon.
Max temperature.....Around 91.
Min humidity........27 percent.
Wind (20 ft)........East winds 15 to 20 mph increasing to around 20
                    mph late in the afternoon. Gusts up to 28 mph.
CWR.................0 percent.
Mixing height.......5600 to 6100 ft agl.
Transport winds.....East 20 to 30 mph.
Smoke dispersal.....Very good.

TIME (MDT)      11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........41  38  26  21  30  30  31
Weather cov.....                ARS ARS ARS
Weather type....                SMK SMK SMK
Tstm cov........
CWR.............0   0   0   0   0   0   0
Temp............77  84  86  88  90  91  90
RH..............57  44  38  34  30  27  27
20 FT wind dir..NE  NE  E   E   E   E   E
20 FT wind spd..14  15  15  16  17  18  20
20 FT wind gust.21  23  23  24  26  25  28
Mix hgt (kft)...2.2 3.1 3.8 4.7 6.0 6.1 5.7
Transp wind dir.E   E   E   E   E   E   E
Transp wind spd.20  22  23  23  24  26  28

.TONIGHT...

Sky/weather.........Partly cloudy (30-40 percent).
Min temperature.....Around 66.
Max humidity........88 percent.
Wind (20 ft)........East winds 10 to 25 mph with gusts to around 29
                    mph.
CWR.................0 percent.
Mixing height.......500 to 1000 ft agl.
Transport winds.....Southeast 25 to 30 mph decreasing to around 20
                    mph overnight.
Smoke dispersal.....Poor.

TIME (MDT)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........32  34  32  43  44  41  28  31  29  30  37  36
Weather cov.....
Weather type....
Tstm cov........
CWR.............0   0   0   0   0   0   0   0   0   0   0   0
Temp............88  85  81  78  75  74  72  70  69  67  66  66
RH..............29  32  41  52  59  64  67  73  79  83  84  86
20 FT wind dir..E   E   E   E   E   SE  SE  SE  E   E   E   E
20 FT wind spd..20  21  21  20  18  17  15  13  12  12  12  10
20 FT wind gust.29  29  29  28  26  24  22  21  18  17  17  17
Mix hgt (kft)...4.6 2.4 0.7 0.6 0.6 0.5 0.5 0.6 0.6 0.7 0.6 0.5
Transp wind dir.E   E   E   SE  SE  SE  SE  SE  SE  SE  SE  SE
Transp wind spd.29  29  29  28  26  24  22  21  18  17  17  16

.MONDAY...

Sky/weather.........Mostly sunny (30-40 percent).
Max temperature.....Around 96.
Min humidity........30 percent.
Wind (20 ft)........Southeast winds 15 to 20 mph with gusts to
                    around 25 mph.
CWR.................0 percent.
Mixing height.......9400 to 9900 ft agl.
Transport winds.....Southeast 20 to 25 mph shifting to the east
                    late in the afternoon.
Smoke dispersal.....Good increasing to excellent late in the
                    afternoon.

TIME (MDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........54  44  27  15  18  21  23  19  25  18  16  14
Weather cov.....
Weather type....
Tstm cov........
CWR.............0   0   0   0   0   0   0   0   0   0   0   0
Temp............66  67  70  74  80  84  88  91  94  95  94  93
RH..............87  85  81  72  59  50  42  37  32  30  30  30
20 FT wind dir..SE  SE  SE  S   S   SE  E   SE  SE  SE  SE  E
20 FT wind spd..16  15  14  13  12  12  12  12  13  13  13  15
20 FT wind gust.23  21  20  18  18  18  18  21  22  24  24  25
Mix hgt (kft)...0.5 0.9 1.3 1.7 2.4 3.1 3.8 5.8 7.9 9.9 8.8 7.7
Transp wind dir.SE  SE  S   S   SE  SE  E   SE  S   SW  S   E
Transp wind spd.16  16  16  16  16  17  18  18  18  20  21  23

.FORECAST DAYS 3 THROUGH 5...
.TUESDAY...
Partly cloudy. Chance of showers and thunderstorms. Lows in the
mid 60s. Highs in the lower 90s. East winds around 15 mph.
.WEDNESDAY...
Partly cloudy. Showers likely and chance of thunderstorms. Lows
in the lower 60s. Highs in the mid 80s. East winds around 15 mph.
.THURSDAY...
Not as warm. Showers and chance of thunderstorms. Lows in the
upper 50s. Highs in the lower 70s. East winds around 20 mph.

$$
Forecaster...GS
Requested by...Duwayne Traversie
Type of request...WILDFIRE
.TAG 2619089.2/UNR
.DELDT 08/09/26
.FormatterVersion 2.0.0
.EMAIL duwayne.traversie@bia.gov,redmonson@blm.gov