452 FNUS73 KUNR 281812 FWSUNR Spot Forecast for 18 mile...USFS National Weather Service Rapid City SD 1112 AM MST Sat Feb 28 2026 Forecast is based on ignition time of 1100 MST on February 28. If conditions become unrepresentative, contact the National Weather Service. .DISCUSSION...Dry weather will continue through the weekend. Breezy northwest winds will become easterly this evening and continue through Sunday morning. Then winds will switch to the west to northwest late Sunday morning or in the afternoon. A storm system will cross the Great Basin on Monday, the push into the central Great Plains on Tuesday. Rain is expected with this system, but right now models indicate the bulk of the rain will stay south of South Dakota. However, some rain may extend into southeast South Dakota, including to the burn site. Smoke dispersal looks to be poor on Monday, but there is more uncertainty with Tuesday, which could be poor or fair. .REST OF TODAY... Sky/weather.........Sunny (10-20 percent). Max temperature.....Around 50. Min humidity........24 percent. Wind (20 ft)........Northwest winds 10 to 15 mph. Gusts up to 25 mph decreasing to 15 mph late in the afternoon. CWR.................0 percent. Mixing height.......6100 to 6600 ft agl. Transport winds.....Northwest 25 to 30 mph shifting to the north around 20 mph late in the afternoon, then shifting to the northeast late in the afternoon. Smoke dispersal.....Very good decreasing to poor late in the afternoon. TIME (MST) 11A 12P 1PM 2PM 3PM 4PM 5PM Sky (%).........11 10 9 9 10 13 20 Weather cov..... Weather type.... Tstm cov........ CWR.............0 0 0 0 0 0 0 Temp............49 49 49 49 48 47 44 RH..............25 24 24 25 27 30 33 20 FT wind dir..NW NW NW NW NW NW N 20 FT wind spd..14 15 15 14 12 9 7 20 FT wind gust.24 24 24 23 21 18 14 Mix hgt (kft)...4.9 4.8 4.6 6.6 3.4 2.4 1.8 Transp wind dir.NW NW NW NW N NE E Transp wind spd.30 30 26 23 18 15 13 .TONIGHT... Sky/weather.........Partly cloudy (35-45 percent) then becoming mostly cloudy (65-75 percent). Min temperature.....Around 20. Max humidity........71 percent. Wind (20 ft)........East winds around 10 mph with gusts to around 20 mph. CWR.................0 percent. Mixing height.......500 to 1000 ft agl. Transport winds.....East 15 to 25 mph. Smoke dispersal.....Poor. TIME (MST) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM Sky (%).........27 43 50 59 67 68 76 78 79 78 74 70 Weather cov..... Weather type.... Tstm cov........ CWR.............0 0 0 0 0 0 0 0 0 0 0 0 Temp............39 35 32 29 27 26 25 23 22 22 23 22 RH..............40 45 52 55 60 65 68 71 71 71 65 68 20 FT wind dir..E E E E E E E E E E E E 20 FT wind spd..7 8 9 9 9 8 7 7 6 6 6 6 20 FT wind gust.14 15 16 17 16 15 14 14 14 13 13 13 Mix hgt (kft)...0.7 0.7 0.8 1.1 0.6 0.6 0.6 0.6 0.6 0.7 0.5 0.6 Transp wind dir.E E E E E E E E E E E E Transp wind spd.15 20 23 22 20 17 16 16 16 16 16 16 .SUNDAY... Sky/weather.........Mostly sunny (45-55 percent). Max temperature.....Around 51. Min humidity........28 percent. Wind (20 ft)........East winds 5 to 10 mph with gusts to around 15 mph shifting to the west to northwest around 10 mph with gusts up to 20 mph in the late morning or early afternoon. CWR.................0 percent. Mixing height.......2700 to 3200 ft agl. Transport winds.....East 10 to 15 mph shifting to the west in the late morning and early afternoon, then increasing to around 15 mph early in the afternoon shifting to the south late in the afternoon. Smoke dispersal.....Poor. TIME (MST) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM Sky (%).........70 66 66 60 45 29 37 36 46 53 49 46 Weather cov..... Weather type.... Tstm cov........ CWR.............0 0 0 0 0 0 0 0 0 0 0 0 Temp............22 24 28 32 36 40 44 47 49 50 49 47 RH..............68 62 58 51 45 40 36 30 28 28 28 31 20 FT wind dir..E E E SE SE S W W W NW NW SE 20 FT wind spd..6 6 6 5 4 3 5 8 9 9 8 2 20 FT wind gust.12 10 9 10 12 13 14 16 18 18 16 10 Mix hgt (kft)...0.5 0.6 0.7 1.0 1.2 1.4 2.0 2.6 3.2 2.3 1.4 0.5 Transp wind dir.E E E SE SW W W W W W S S Transp wind spd.14 12 10 9 10 12 12 13 13 12 10 8 .FORECAST DAYS 3 THROUGH 7... .MONDAY... Mostly cloudy with slight chance of rain. Lows in the mid 30s. Highs in the upper 50s. North winds around 5 mph. Expected smoke dispersal is poor. .TUESDAY... Mostly cloudy. Slight chance of rain. Lows in the upper 30s. Highs in the mid 50s. Northeast winds around 5 mph. Expected smoke dispersal is poor to fair. .WEDNESDAY... Mostly clear. Lows in the mid 30s. Highs around 60. Southwest winds around 10 mph. .THURSDAY... Mostly cloudy. Chance of rain. Lows in the upper 30s. Highs in the lower 50s. .FRIDAY... Partly cloudy. Chance of snow and rain. Lows in the upper 20s. Highs in the mid 40s. $$ Forecaster...13 Requested by...Chris Bennett Type of request...PRESCRIBED .TAG 2604246.1/UNR .DELDT 02/28/26 .FormatterVersion 2.0.0 .EMAIL christopher.bennett@usda.gov