FNUS73 KUNR 161101 FWSUNR Spot Forecast for 87 fire...USFS National Weather Service Rapid City SD 501 AM MDT Thu Apr 16 2026 Forecast is based on forecast start time of 0600 MDT on April 16. If conditions become unrepresentative, contact the National Weather Service. .DISCUSSION...Warm today with highs in the mid 60s and afternoon humidities ranging from 24 to 30 percent. Southwest winds will become breezy ahead of a cold front approaching the area. Cloud cover and chances for showers/thunderstorms will increase through the afternoon. Severe weather isn't expected but thunderstorms could produce gusty and erratic winds. The front should impact the fire site by around 1500-1600 hours this afternoon with winds shifting to the north behind the front. Rain will transition over to snow overnight tonight as colder air moves into the area. Lows will be in the low 20s with humidities recovering to 89 percent. Winds will be out of the north all night with sustained winds of around 10 mph and gusts up to 26 mph. Snow will continue through Friday with total snow accumulations of around 1 to 2" (liquid equivalent of around 0.15"). Precip will move out of the area Friday night with warmer and drier weather returning for this weekend. .TODAY... Sky/weather.........Mostly sunny (35-45 percent) then becoming cloudy (85-95 percent). Rain showers likely and slight chance of thunderstorms in the afternoon. Max temperature.....Around 65. Min humidity........24 percent. Wind (20 ft)........Southwest winds 10 to 15 mph with gusts of up to 36 mph. Winds will shift to the north after 1500-1600. Gusty and erratic winds expected near thunderstorms late in the afternoon. CWR.................40 percent. Mixing height.......9500 to 10000 ft agl. Transport winds.....West 40 to 50 mph shifting to the southwest 45 to 55 mph late in the morning, then decreasing to 35 to 45 mph early in the afternoon decreasing to 25 to 30 mph late in the afternoon. Smoke dispersal.....Very good increasing to excellent in the late morning and afternoon. TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM Sky (%).........31 38 45 41 44 48 88 88 88 88 88 88 Weather cov..... SCH CHC LKY LKY Weather type.... RW RW RW RW Tstm cov........ SCH SCH SCH CWR.............40 40 40 40 40 40 40 40 40 40 40 40 Temp............52 52 53 55 57 60 61 63 64 62 62 59 RH..............39 39 37 35 33 29 27 26 24 26 27 30 20 FT wind dir..W W W SW SW SW SW SW SW SW N N 20 FT wind spd..10 10 10 12 12 12 12 10 10 10 9 8 20 FT wind gust.30 32 33 36 32 32 31 31 30 29 28 25 Mix hgt (kft)...0.4 0.6 1.4 2.3 3.3 5.0 6.3 7.6 8.6 10 7.3 6.1 Transp wind dir.W W W W W SW SW SW SW SW SW SW Transp wind spd.40 45 49 53 52 48 45 41 38 35 30 25 .TONIGHT... Sky/weather.........Cloudy (90-100 percent). Rain showers and snow showers in the evening, then snow showers likely overnight. Min temperature.....Around 23. Max humidity........89 percent. Wind (20 ft)........North winds around 10 mph with gusts to around 26 mph. CWR.................60 percent. Mixing height.......800 to 1300 ft agl. Transport winds.....Southwest around 25 mph shifting to the northwest early in the evening. Smoke dispersal.....Poor. TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM Sky (%).........100 100 100 100 97 94 91 92 93 94 93 93 Weather cov.....LKY LKY LKY DEF DEF DEF LKY LKY LKY LKY LKY LKY Weather type....RW RW RW RS SW SW SW SW SW SW SW SW Tstm cov........ CWR.............60 60 60 60 60 60 60 60 60 60 60 60 Temp............52 46 41 38 35 32 30 29 28 27 26 24 RH..............44 60 76 82 85 89 85 81 81 81 78 77 20 FT wind dir..N N N N N N N N N N N NW 20 FT wind spd..7 7 8 9 9 9 9 9 8 8 8 7 20 FT wind gust.23 23 24 26 26 26 26 26 25 25 25 24 Mix hgt (kft)...3.7 1.6 1.1 1.2 1.2 1.2 1.7 1.6 1.3 0.8 1.0 1.1 Transp wind dir.SW W NW N N N N N N N N N Transp wind spd.23 21 21 22 22 22 23 22 21 20 21 22 .FRIDAY... Sky/weather.........Mostly cloudy (70-80 percent). Snow showers likely. Max temperature.....Around 36. Min humidity........40 percent. Wind (20 ft)........Northwest winds around 10 mph with gusts to around 30 mph. CWR.................40 percent. Mixing height.......6000 to 6500 ft agl. Transport winds.....Northwest 25 to 35 mph increasing to 35 to 40 mph late in the afternoon. Smoke dispersal.....Very good increasing to excellent in the afternoon. TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM Sky (%).........92 92 91 91 88 86 83 81 78 76 67 59 Weather cov.....LKY LKY LKY LKY LKY LKY LKY LKY LKY LKY LKY LKY Weather type....SW SW SW SW SW SW SW SW SW SW SW SW Tstm cov........ CWR.............40 40 40 40 40 40 40 40 40 40 40 40 Temp............24 24 26 28 30 32 33 35 36 36 35 34 RH..............74 71 63 58 53 49 47 43 40 40 41 41 20 FT wind dir..NW NW NW NW NW NW NW NW NW NW NW NW 20 FT wind spd..7 7 8 9 9 10 10 10 10 10 10 10 20 FT wind gust.24 24 25 26 26 28 28 29 29 30 30 30 Mix hgt (kft)...1.3 1.8 2.3 2.8 3.4 4.0 4.6 5.2 5.9 6.5 6.2 5.9 Transp wind dir.N N NW NW NW NW NW NW NW NW NW NW Transp wind spd.24 25 28 29 29 29 29 31 33 35 37 37 $$ Forecaster...EW Requested by...Ryan Flynn Type of request...WILDFIRE .TAG 2610047.5/UNR .DELDT 04/16/26 .FormatterVersion 2.0.0 .EMAIL jeremy.dalman@usda.gov,wayne.yanders@usda.gov,sdgpc@firenet.gov,thomas.roerick@usda.gov