462
FNUS73 KUNR 280324
FWSUNR
SPOT FORECAST FOR ROCK...BIA
NATIONAL WEATHER SERVICE RAPID CITY SD
924 PM MDT WED MAY 27 2026
FORECAST IS BASED ON FORECAST START TIME OF 2100 MDT ON MAY 27.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL
WEATHER SERVICE.
DISCUSSION
SOUTHEAST WINDS WILL GRADUALLY DIMINISH IN STRENGTH AS
TEMPERATURES COOL OFF THROUGH THE REST OF THIS EVENING AND AN
INVERSION BUILDS. BREEZY WINDS MAY CONTINUE THROUGH THE NIGHT,
THOUGH GUST FREQUENCY WILL BE MORE RANDOM. FAIR TO GOOD OVERNIGHT
HUMIDITY RECOVERY EXPECTED TONIGHT WITH MAXIMUM RHS OF ~75%
EXPECTED BY DAWN. NO PRECIPITATION EXPECTED OVERNIGHT.
STRONG SOUTH-SOUTHEAST WINDS WILL REDEVELOP OVER THE FIRE
THURSDAY WITH PEAK GUSTS OF 25 TO 35 MPH EXPECTED BY LATE MORNING
INTO THE AFTERNOON HOURS. DAYTIME RELATIVE HUMIDITIES WILL DROP TO
AROUND 25 TO 28 PERCENT. ISOLATED SHOWERS AND STORMS ARE POSSIBLE
THURSDAY AFTERNOON. THE MAIN HAZARDS WITH ANY STORMS WILL BE
LIGHTNING AND GUSTY, ERRATIC OUTFLOW WINDS. NOT EXPECTING ANY
SIGNIFICANT PRECIPITATION, THOUGH STRONGER STORMS COULD PRODUCE
BRIEF, HEAVY DOWNPOURS.
VERY WARM TEMPERATURES, BREEZY SOUTH-SOUTHEAST WINDS, AND CHANCES
FOR AFTERNOON SHOWERS AND STORMS WILL OCCUR AGAIN ON FRIDAY.
REST OF TONIGHT
SKY/WEATHER.........PARTLY CLOUDY (40-50 PERCENT).
MIN TEMPERATURE.....AROUND 57.
MAX HUMIDITY........65-75 PERCENT.
WIND (20 FT)........SOUTHEAST WINDS 10 TO 15 MPH WITH GUSTS TO
AROUND 25 MPH. WINDS GRADUALLY DIMINISH AFTER
2200.
CWR.................0 PERCENT.
MIXING HEIGHT.......500 TO 1000 FT AGL.
TRANSPORT WINDS.....SOUTHEAST 15 TO 25 MPH.
SMOKE DISPERSAL.....POOR.
TIME (MDT) 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........31 45 47 44 41 54 53 50 36
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0
TEMP............71 68 66 65 64 63 62 59 59
RH..............37 42 45 47 49 51 54 62 64
20 FT WIND DIR..SE SE SE SE SE SE SE SE SE
20 FT WIND SPD..15 14 13 12 10 10 10 10 10
20 FT WIND GUST.25 24 21 17 17 16 18 17 17
MIX HGT (KFT)...0.6 0.6 0.5 0.5 0.5 0.5 0.5 0.5 0.5
TRANSP WIND DIR.SE SE SE S S S S S S
TRANSP WIND SPD.22 21 20 20 18 18 17 16 15
THURSDAY
SKY/WEATHER.........PARTLY SUNNY (65-75 PERCENT). SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS IN THE AFTERNOON.
MAX TEMPERATURE.....AROUND 84.
MIN HUMIDITY........25-28 PERCENT.
WIND (20 FT)........SOUTHEAST WINDS WILL INCREASE IN STRENGTH THROUGH
THE MORNING TO 15 TO 20 MPH WITH GUSTS TO AROUND
25 TO 35 MPH. GUSTY AND ERRATIC WINDS EXPECTED NEAR
THUNDERSTORMS IN THE AFTERNOON.
CWR.................0 PERCENT.
MIXING HEIGHT.......7600 TO 8100 FT AGL.
TRANSPORT WINDS.....SOUTHEAST 15 TO 25 MPH INCREASING TO 30 TO 35
MPH IN THE LATE MORNING AND AFTERNOON.
SMOKE DISPERSAL.....GOOD INCREASING TO EXCELLENT.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........55 54 51 70 69 87 85 55 64 74 69 69
WEATHER COV..... SCH SCH SCH SCH SCH SCH
WEATHER TYPE.... RW RW RW RW RW RW
TSTM COV........ SCH SCH SCH
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
TEMP............59 64 69 73 78 80 81 82 82 82 82 83
RH..............72 63 53 44 36 33 32 29 29 28 27 25
20 FT WIND DIR..SE SE S S S S S S S S S S
20 FT WIND SPD..9 12 13 16 18 20 20 21 21 21 22 22
20 FT WIND GUST.16 18 20 23 25 28 30 31 32 32 35 33
MIX HGT (KFT)...0.5 0.7 2.1 3.5 4.6 5.6 6.6 7.1 7.6 8.1 6.9 5.6
TRANSP WIND DIR.SE SE SE SE SE SE SE SE S S S SE
TRANSP WIND SPD.15 18 22 26 29 30 31 32 32 32 32 33
THURSDAY NIGHT
SKY/WEATHER.........MOSTLY CLOUDY (60-70 PERCENT) THEN BECOMING
PARTLY CLOUDY (35-45 PERCENT). SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS IN THE EVENING.
MIN TEMPERATURE.....AROUND 55.
MAX HUMIDITY........77-85 PERCENT.
WIND (20 FT)........SOUTH WINDS 20 TO 25 MPH WITH GUSTS TO AROUND
32 MPH. GUSTY AND ERRATIC WINDS EXPECTED NEAR
THUNDERSTORMS EARLY IN THE EVENING.
CWR.................0 PERCENT.
MIXING HEIGHT.......1000 TO 1500 FT AGL.
TRANSPORT WINDS.....SOUTHEAST 25 TO 35 MPH.
SMOKE DISPERSAL.....POOR.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........73 74 66 64 55 49 44 30 38 36 32 40
WEATHER COV.....SCH SCH SCH SCH SCH SCH
WEATHER TYPE....RW RW RW RW RW RW
TSTM COV........SCH SCH SCH
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
TEMP............80 80 78 71 69 67 66 65 63 60 60 59
RH..............30 29 34 42 47 50 52 54 58 67 69 75
20 FT WIND DIR..S SE SE S S S S S S S S S
20 FT WIND SPD..21 21 20 17 17 17 17 16 16 16 17 17
20 FT WIND GUST.32 32 30 26 26 26 25 26 26 26 26 28
MIX HGT (KFT)...4.3 3.2 2.1 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0
TRANSP WIND DIR.SE SE SE SE SE S S S S S S S
TRANSP WIND SPD.33 32 30 29 28 28 28 26 25 25 25 26
FRIDAY
SKY/WEATHER.........MOSTLY SUNNY (40-50 PERCENT). CHANCE OF
SHOWERS AND THUNDERSTORMS IN THE AFTERNOON.
MAX TEMPERATURE.....AROUND 85.
MIN HUMIDITY........30-33 PERCENT.
WIND (20 FT)........SOUTH WINDS 20 TO 25 MPH WITH GUSTS TO AROUND
30 MPH. GUSTY AND ERRATIC WINDS EXPECTED NEAR
THUNDERSTORMS LATE IN THE AFTERNOON.
CWR.................20 PERCENT.
MIXING HEIGHT.......5500 TO 6000 FT AGL.
TRANSPORT WINDS.....SOUTH 30 TO 35 MPH.
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 (%).........63 52 51 50 46 41 37 34 32 29 32 35
WEATHER COV..... CHC CHC CHC CHC CHC CHC
WEATHER TYPE.... RW RW RW RW RW RW
TSTM COV........ CHC CHC CHC
CWR.............20 20 20 20 20 20 20 20 20 20 20 20
TEMP............56 60 64 68 73 77 80 82 84 84 84 84
RH..............83 75 63 53 44 39 35 33 30 30 30 30
20 FT WIND DIR..S S S S S S S S S S S SE
20 FT WIND SPD..17 20 21 22 22 22 21 21 21 21 21 20
20 FT WIND GUST.26 26 28 29 30 30 30 30 30 30 30 30
MIX HGT (KFT)...1.0 1.7 2.3 3.0 3.6 4.3 4.9 5.3 5.6 6.0 5.2 4.4
TRANSP WIND DIR.S S S S S S S S S S S S
TRANSP WIND SPD.28 29 30 30 31 31 30 30 30 30 30 30
FORECASTER...EW
REQUESTED BY...WILLIAM YOUNG BEAR
TYPE OF REQUEST...WILDFIRE
.TAG 2614585.0/UNR
.DELDT 05/27/26
.FORMATTERVERSION 2.0.0
.EMAIL WILLIAM.YOUNGBEAR@BIA.GOV
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