863
FNUS73 KUNR 231619
FWSUNR

Spot Forecast for Brooks...Pine Ridge Agency USWFS
National Weather Service Rapid City SD
1019 AM MDT Sun Aug 23 2026

Forecast is based on forecast start time of 1200 MDT on August 23.
If conditions become unrepresentative, contact the National Weather
Service.

.DISCUSSION...Hot (high around 91) with daytime minimum relative
humidity falling to around 35 percent this afternoon. Southerly
winds of 15 to 20 mph with gusts of 27 mph will become
southwesterly around noon at similiar speeds. Around 1500, winds
will turn westerly with wind speeds decreasing to 10 to 13 mph.
Around 1700 winds will shifting northwesterly with speeds of 5 to
10 mph. An isolated thunderstorm is possible late this afternoon
into the evening hours (1600-1900). While coverage will be
spotty, main hazards will be: hail; gusty, erratic winds; and
lightning.

Good overnight relative humidity recovery tonight into Monday
morning (around 90 percent) as winds become light and variable
(outside of any storms) after 1900.

.REST OF TODAY...

Sky/weather.........Sunny (10-20 percent). Slight chance of showers
                    and thunderstorms late in the afternoon.
Max temperature.....Around 91.
Min humidity........35 percent.
Wind (20 ft)........Southwest winds 15 to 20 mph with gusts to
                    around 27 mph shifting to the west around 10
                    mph with gusts to around 20 mph late in the
                    afternoon, then shifting to the northwest with
                    gusts to around 15 mph late in the afternoon.
                    Gusty and erratic winds expected near
                    thunderstorms.
CWR.................0 percent.
Mixing height.......5200 to 5700 ft agl.
Transport winds.....South 20 to 30 mph shifting to the southwest
                    around 20 mph late in the afternoon.
Smoke dispersal.....Very good.

TIME (MDT)      12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........15  4   2   7   11  28
Weather cov.....                SCH SCH
Weather type....                RW  RW
Tstm cov........                SCH SCH
CWR.............0   0   0   0   0   0
Temp............87  89  90  90  90  90
RH..............48  42  39  36  34  34
20 FT wind dir..SW  SW  SW  W   W   NW
20 FT wind spd..17  15  13  10  8   7
20 FT wind gust.27  24  20  16  20  20
Mix hgt (kft)...4.9 5.2 5.4 5.7 5.3 4.9
Transp wind dir.S   S   SW  SW  SW  W
Transp wind spd.26  23  18  16  16  17

.TONIGHT...

Sky/weather.........Mostly clear (15-25 percent). Slight chance of
                    showers and thunderstorms early in the evening.
Min temperature.....Around 65.
Max humidity........90 percent.
Wind (20 ft)........Northeast winds around 10 mph with gusts to
                    around 20 mph shifting to the southeast with
                    gusts to around 16 mph early in the evening,
                    then shifting to the south with gusts to around
                    12 mph late in the evening shifting to the
                    southwest overnight shifting to the west. Gusty
                    and erratic winds expected near thunderstorms
                    early in the evening. Gusty and erratic winds
                    expected near thunderstorms late in the
                    evening.
CWR.................0 percent.
Mixing height.......400 to 900 ft agl.
Transport winds.....West around 20 mph shifting to the south 10 to
                    20 mph early in the evening, then shifting to
                    the southwest around 10 mph after 3 am.
Smoke dispersal.....Poor.

TIME (MDT)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........28  14  12  20  23  17  14  11  9   20  23  21
Weather cov.....SCH SCH
Weather type....RW  RW
Tstm cov........SCH SCH
CWR.............0   0   0   0   0   0   0   0   0   0   0   0
Temp............87  83  79  76  73  71  70  69  68  67  65  65
RH..............39  48  58  64  73  76  78  81  84  84  90  87
20 FT wind dir..NE  NE  E   SE  SE  S   S   S   SW  W   W   W
20 FT wind spd..10  9   8   8   7   6   5   5   3   3   3   3
20 FT wind gust.20  17  16  16  14  12  10  9   8   8   8   8
Mix hgt (kft)...4.4 3.2 1.9 0.6 0.6 0.5 0.4 0.4 0.4 0.4 0.4 0.4
Transp wind dir.W   SW  S   E   SE  SE  S   S   SW  SW  SW  SW
Transp wind spd.18  17  16  15  13  12  9   9   9   9   9   8

.MONDAY...

Sky/weather.........Sunny (20-30 percent).
Max temperature.....Around 91.
Min humidity........32 percent.
Wind (20 ft)........Southwest winds around 5 mph shifting to the
                    west early in the morning, then shifting to the
                    north with gusts to around 15 mph in the late
                    morning and early afternoon increasing to north
                    around 10 mph with gusts to around 18 mph late
                    in the afternoon.
CWR.................0 percent.
Mixing height.......7800 to 8300 ft agl.
Transport winds.....West 10 to 15 mph shifting to the north 15 to
                    20 mph late in the morning.
Smoke dispersal.....Good increasing to very good late in the
                    afternoon.

TIME (MDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........31  41  26  16  9   11  6   10  15  12  24  27
Weather cov.....
Weather type....
Tstm cov........
CWR.............0   0   0   0   0   0   0   0   0   0   0   0
Temp............66  69  73  77  81  84  86  88  89  90  90  89
RH..............84  78  71  62  53  46  40  35  34  32  32  33
20 FT wind dir..SW  SW  W   NW  NW  N   N   N   N   N   N   N
20 FT wind spd..3   3   5   5   6   7   7   8   8   8   10  10
20 FT wind gust.8   8   9   10  12  12  13  14  15  16  18  18
Mix hgt (kft)...0.4 0.6 0.7 0.9 1.8 2.8 3.7 5.2 6.8 8.3 6.5 4.8
Transp wind dir.W   W   W   W   W   NW  N   N   N   N   N   N
Transp wind spd.8   9   10  12  12  12  12  13  13  15  17  20

$$
Forecaster...MS
Requested by...Colynn Condon
Type of request...WILDFIRE
.TAG 2620269.1/UNR
.DELDT 08/23/26
.FormatterVersion 2.0.0
.EMAIL william.youngbear@bia.gov,adrian.yellowkidney@bia.gov,berneyrulz2002@yahoo.com,colynn.condon@bia.gov,marjoe.janis@bia.gov