642 FNUS73 KUNR 291422 FWSUNR Spot Forecast for Mount Rushmore Fireworks Preperations...National Park Service National Weather Service Rapid City SD 822 AM MDT Mon Jun 29 2026 Forecast is based on forecast start time of 0600 MDT on June 30. If conditions become unrepresentative, contact the National Weather Service. .DISCUSSION...Elevated fire conditions are expected today and tomorrow, with minimum relative humidity falling into the upper teens. Gusty southwest winds expected today, with gusts up to 30 to 35 mph. Lighter winds develop Tuesday with warm and dry conditions. Ample sunshine coupled RH falling to around 15 percent will result in continued elevated fire weather concerns, although winds will be generally light and terrain driven Tuesday afternoon. Diurnally driven winds will persist overnight Tuesday. Isolated thunderstorms are possible Tuesday evening into the overnight hours, with gusty winds and lightning the main threats. Overall, chance of thunder is around 20-30 percent Tuesday evening. .TUESDAY... Sky/weather.........Sunny (5-15 percent). Max temperature.....Around 81. Min humidity........15-20 percent. Chance of pcpn......0 percent. Max apparent temp...79. Surface winds (mph).Terrain variable winds with upslope and upvalley flows dominating, 5 to 10 mph. Gusts up to 12 to 16 mph, especially on exposed/unsheltered upper slopes. Rainfall amount.....0.00 inches. TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM Sky (%).........16 8 4 3 4 5 7 8 9 8 11 11 Weather cov..... Weather type.... Tstm cov........ Chc of pcpn (%).0 0 0 0 0 0 0 0 0 0 0 0 Temp............55 58 62 68 72 73 75 77 79 79 79 81 RH..............43 40 36 31 27 23 21 18 17 16 15 16 Heat index (F)..55 58 62 68 72 73 75 77 79 79 79 79 Surface wnd dir.W W W W SW SW SW SW SW SW SW SW Surface wnd spd.3 3 2 3 3 5 5 5 5 5 3 3 Surface wnd gst.13 13 12 13 15 16 16 16 16 16 15 14 .TUESDAY NIGHT... Sky/weather.........Partly cloudy (25-35 percent) then becoming mostly cloudy (65-75 percent). Chance of showers and thunderstorms in the evening, then slight chance of showers and thunderstorms overnight. Min temperature.....Around 59. Max humidity........60 percent. Chance of pcpn......30 percent. Max apparent temp...79. Surface winds (mph).Light winds; diurnally driven winds. Gusty, erratic winds with any showers or storms. Rainfall amount.....0.04 inches. TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM Sky (%).........16 25 47 68 70 72 74 72 70 68 64 61 Weather cov.....CHC CHC CHC CHC CHC CHC SCH SCH SCH SCH SCH SCH Weather type....RW RW RW RW RW RW RW RW RW RW RW RW Tstm cov........CHC CHC CHC SCH SCH SCH SCH SCH SCH SCH SCH SCH Chc of pcpn (%).30 30 30 30 30 30 20 20 20 20 20 20 Temp............79 76 72 68 65 63 62 61 60 60 59 59 RH..............20 24 30 36 41 46 50 51 53 53 57 57 Heat index (F)..79 76 72 68 65 63 62 61 60 60 59 59 Surface wnd dir.S S W N N N N N NW NW NW NW Surface wnd spd.2 2 2 2 2 1 1 1 1 1 1 2 Surface wnd gst.10 8 8 9 8 7 6 6 6 6 7 7 $$ Forecaster...SE Requested by...Owen MUrnane Type of request...OTHER .TAG 2616426.0/UNR .DELDT 06/29/26 .FormatterVersion 2.0.0 .EMAIL owen_murnane@nps.gov