FNUS73 KUNR 181405 FWSUNR Spot Forecast for Newcastle Drag Races...Weston County OEM National Weather Service Rapid City SD 805 AM MDT Sat Jul 18 2026 Forecast is based on forecast start time of 0900 MDT on July 18. If conditions become unrepresentative, contact the National Weather Service. ...HEAT ADVISORY IN EFFECT UNTIL 9 PM MDT SUNDAY... .DISCUSSION...Hot weather is expected to continue today with high temperatures around 95F, but a maximum heat index around 91F due to the dry air. A brief, isolated thunderstorm is possible between 300 PM and midnight. If a thunderstorm does develop, it will have gusty, erratic winds. Sunday will be mostly sunny very hot with a high around 99F, though the dry air will result in a maximum heat index around 95F. Winds will be light from the south. Isolated showers are possible between 200 PM and Midnight. .REST OF TODAY... Sky/weather.........Sunny (10-20 percent). Slight chance of showers and thunderstorms after 300 PM. Max temperature.....Around 95. Min humidity........20 percent. Chance of pcpn......20 percent. Max apparent temp...91. Surface winds (mph).South winds 7 to 12 mph with gusts to around 22 mph. Rainfall amount.....0.00 inches. TIME (MDT) 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM Sky (%).........10 8 14 9 5 16 12 17 25 Weather cov..... SCH SCH SCH Weather type.... RW RW RW Tstm cov........ SCH SCH SCH Chc of pcpn (%).0 0 0 10 10 10 20 20 20 Temp............79 82 84 87 89 92 94 94 94 RH..............50 44 39 33 28 23 21 21 20 Heat index (F)..80 82 83 85 87 89 91 91 90 Surface wnd dir.S S S S S S S SE SE Surface wnd spd.7 8 10 12 12 12 12 12 12 Surface wnd gst.15 16 18 20 21 21 21 21 22 .TONIGHT... Sky/weather.........Partly cloudy (35-45 percent) until 700 PM then becoming mostly cloudy (60-70 percent) until 200 AM then becoming partly cloudy (30-40 percent). Slight chance of showers and thunderstorms in the evening. Min temperature.....Around 72. Max humidity........45 percent. Chance of pcpn......20 percent. Max apparent temp...89. Surface winds (mph).Southeast winds 10 to 12 mph shifting to the east 7 to 12 mph early in the evening. Gusts up to 22 mph. Rainfall amount.....less than a tenth of an inch. TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM Sky (%).........31 40 48 67 58 40 31 43 30 24 32 33 Weather cov.....SCH SCH SCH SCH SCH SCH Weather type....RW RW RW RW RW RW Tstm cov........SCH SCH SCH SCH SCH SCH Chc of pcpn (%).20 20 20 20 20 20 10 10 10 10 10 10 Temp............93 90 87 83 82 81 80 78 77 76 73 73 RH..............21 24 27 30 32 33 34 36 37 37 41 41 Heat index (F)..89 87 84 81 81 80 79 78 77 76 73 73 Surface wnd dir.SE SE E E E E E E E SE SE E Surface wnd spd.12 10 10 12 12 12 10 9 8 8 7 7 Surface wnd gst.22 22 21 21 21 21 20 18 16 14 14 13 .SUNDAY... Sky/weather.........Mostly sunny (25-35 percent). An isolated thunderstorm is possible after 200 PM. Max temperature.....Around 99. Min humidity........17 percent. Chance of pcpn......10 percent. Max apparent temp...94. Surface winds (mph).Southeast winds around 5 mph shifting to the south around midday. Gusts up to 12 mph. Rainfall amount.....0.00 inches. $$ Forecaster...MS Requested by...Gilbert Nelson Type of request...OTHER.TAG 2605054.0/UNR .DELDT 07/18/26 .FormatterVersion 2.0.0 .EMAIL gnelson@westongov.com