496
FNUS73 KUNR 131107
FWSUNR

Spot Forecast for Buck...Great Plains Dispatch
National Weather Service Rapid City SD
507 AM MDT Wed Aug 13 2025

Forecast is based on forecast start time of 0600 MDT on August 13.
If conditions become unrepresentative, contact the National Weather
Service.

.DISCUSSION...
Hot weather is expected today with highs in the upper 90s with
minimum relative humidities around 17 percent. Similar highs are
expected Thursday with minimum relative humidities around 12
percent. Winds will trend westerly this morning and then
northerly tonight and Thursday. Ridgetops will see the highest
gusts. Isolated thunderstorms may occur between 300 PM and 900 PM
today with gusty erratic winds. The chance of wetting rain is
near zero.

.TODAY...

Sky/weather.........Mostly sunny (20-30 percent). Slight chance of
                    showers and thunderstorms late in the
                    afternoon.
Max temperature.....Around 97.
Min humidity........17 percent.
Wind (20 ft)........Terrain driven less than 10 mph
                    becoming west 5-15 mph and then northwest
                    late. Gusts around 20 mph in the afternoon.
                    Gusty and erratic winds near thunderstorms.
CWR.................0 percent.
Mixing height.......7100 to 7600 ft agl increasing to 13700 to
                    14200 ft agl late in the afternoon.
Transport winds.....Southwest around 10 mph shifting to the west 15
                    to 20 mph in the late morning and afternoon.
Smoke dispersal.....Fair increasing to excellent.

TIME (MDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........21  26  19  12  15  16  17  15  16  28  31  39
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............65  67  72  77  81  85  90  94  96  97  97  97
RH..............72  67  55  46  39  33  26  22  19  17  18  18
20 FT wind dir..NE  NW  NW  W   W   SW  SW  W   W   W   W   NW
20 FT wind spd..6   6   6   6   7   7   8   9   10  12  12  12
20 FT wind gust.10  10  10  13  14  13  15  16  18  20  20  20
Mix hgt (kft)...0.4 0.7 1.0 1.3 2.3 3.3 4.3 7.6 11  14  13  11
Transp wind dir.S   S   SW  W   W   W   W   W   W   W   W   NW
Transp wind spd.9   10  10  12  12  13  14  16  18  20  20  20

.TONIGHT...

Sky/weather.........Partly cloudy (25-35 percent). Slight chance of
                    showers and thunderstorms early in the evening.
Min temperature.....Around 66.
Max humidity........63 percent.
Wind (20 ft)........North 5-15 mph. Gusts to 20 mph in the evening.
                    Gusty and erratic winds expected
                    near thunderstorms early in the evening.
CWR.................0 percent.
Mixing height.......400 to 900 ft agl.
Transport winds.....Northwest around 20 mph decreasing to around 10
                    mph.
Smoke dispersal.....Very good decreasing to poor early in the
                    evening.

TIME (MDT)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........40  46  27  24  22  13  16  21  30  33  15  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............94  87  81  77  74  73  71  70  68  67  66  66
RH..............20  28  35  40  46  51  57  57  61  61  63  58
20 FT wind dir..N   N   NE  NE  NE  NE  NE  N   N   N   NW  NW
20 FT wind spd..10  9   8   7   6   6   5   5   6   6   6   7
20 FT wind gust.20  16  14  13  12  10  7   10  10  10  10  10
Mix hgt (kft)...9.7 6.6 3.5 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4
Transp wind dir.NW  N   N   NE  NE  N   N   N   NW  NW  NW  NW
Transp wind spd.18  18  17  16  14  10  8   8   9   9   10  10

.THURSDAY...

Sky/weather.........Sunny (10-20 percent).
Max temperature.....Around 99.
Min humidity........12 percent.
Wind (20 ft)........Northwest winds 10 to 15 mph. Gusts around
                    20 mph.
CWR.................0 percent.
Mixing height.......8500 to 9000 ft agl increasing to 14000 to
                    14500 ft agl late in the afternoon.
Transport winds.....West 15 to 25 mph shifting to the northwest
                    around 25 mph late in the afternoon.
Smoke dispersal.....Good increasing to excellent.

TIME (MDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........12  7   3   0   1   3   4   11  17  24  27  29
Weather cov.....
Weather type....
Tstm cov........
CWR.............0   0   0   0   0   0   0   0   0   0   0   0
Temp............67  69  75  81  86  90  94  97  98  99  99  98
RH..............54  51  41  33  27  22  18  15  13  12  12  14
20 FT wind dir..NW  NW  W   W   W   W   W   W   NW  NW  NW  N
20 FT wind spd..7   8   9   9   10  12  13  13  13  13  13  12
20 FT wind gust.13  14  14  15  16  18  21  22  23  23  23  22
Mix hgt (kft)...0.4 0.6 0.8 1.0 2.8 4.6 6.3 9.0 12  15  13  12
Transp wind dir.NW  NW  W   W   W   W   W   W   W   W   NW  NW
Transp wind spd.12  13  14  15  17  18  20  21  22  22  21  21

$$
Forecaster...EH
Requested by...Veronica Witt
Type of request...WILDFIRE
.TAG 2519712.2/UNR
.DELDT 08/13/25
.FormatterVersion 2.0.0
.EMAIL sdgpc@firenet.gov