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