397
FNUS73 KUNR 230408
FWSUNR
SPOT FORECAST FOR ROCK CREEK...USFS
NATIONAL WEATHER SERVICE RAPID CITY SD
1008 PM MDT WED APR 22 2026
FORECAST IS BASED ON FORECAST START TIME OF 2200 MDT ON APRIL 22.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
STRONG WEST WINDS WILL CONTINUE TONIGHT WITH GUSTS
UP TO 45 MPH. RELATIVE HUMIDITY WILL BE SLOW TO RECOVER (~19% AS
OF 2200), WITH OVERNIGHT RECOVERY AROUND 45 PERCENT BY DAYBREAK.
COOLER, DRY, AND BREEZY TOMORROW AS DAYTIME RH FALLS TO AROUND
35 PERCENT WITH WEST WINDS BECOMING NORTHWEST AFTER 0900. SPOTTY
LIGHT RAIN POSSIBLE THROUGH THE DAY WITH SNOW MIXING IN OVERNIGHT.
COOLER AND WETTER THROUGH THE WEEKEND WITH AROUND 0.1-0.15" OF
LIQUID THURSDAY THROUGH FRIDAY NIGHT WITH ANOTHER ROUND OF
PRECIPITATION SUNDAY MORNING THROUGH MONDAY WITH UPWARDS OF
0.5" OF LIQUID.
REST OF TONIGHT
SKY/WEATHER.........MOSTLY CLEAR (15-25 PERCENT).
MIN TEMPERATURE.....AROUND 39.
MAX HUMIDITY........45-50 PERCENT.
WIND (20 FT)........BREEZY. WEST WINDS 25 TO 30 MPH WITH GUSTS TO
AROUND 45 MPH.
CWR.................0 PERCENT.
MIXING HEIGHT.......700 TO 1200 FT AGL.
TRANSPORT WINDS.....WEST 40 TO 45 MPH.
SMOKE DISPERSAL.....POOR.
TIME (MDT) 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........22 13 14 17 22 18 21 20
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0
TEMP............54 51 49 46 45 43 41 41
RH..............21 26 30 35 36 40 45 45
20 FT WIND DIR..W W W W W W W W
20 FT WIND SPD..24 25 26 28 29 29 28 25
20 FT WIND GUST.45 40 40 38 40 40 38 35
MIX HGT (KFT)...1.1 1.1 1.0 1.0 1.0 0.9 0.8 0.7
TRANSP WIND DIR.W W W W W W W W
TRANSP WIND SPD.40 43 44 44 44 44 41 40
THURSDAY
SKY/WEATHER.........MOSTLY SUNNY (45-55 PERCENT)THEN BECOMING
CLOUDY (85-95 PERCENT). CHANCE OF SNOW SHOWERS
EARLY IN THE MORNING. CHANCE OF RAIN SHOWERS
THROUGH THE DAY.
MAX TEMPERATURE.....AROUND 53.
MIN HUMIDITY........35-40 PERCENT.
WIND (20 FT)........BREEZY. WEST WINDS AROUND 25 MPH SHIFTING TO
THE NORTHWEST LATE IN THE MORNING. GUSTS UP TO
40 MPH DECREASING TO 26 MPH LATE IN THE
AFTERNOON.
CWR.................25 PERCENT.
MIXING HEIGHT.......7300 TO 7800 FT AGL.
TRANSPORT WINDS.....WEST 40 TO 45 MPH SHIFTING TO THE NORTHWEST 40
TO 50 MPH IN THE LATE MORNING AND EARLY
AFTERNOON, THEN DECREASING TO 30 TO 35 MPH LATE
IN THE AFTERNOON.
SMOKE DISPERSAL.....FAIR INCREASING TO EXCELLENT EARLY IN THE
MORNING.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........27 44 40 40 67 68 77 61 75 88 59 54
WEATHER COV.....CHC CHC CHC CHC CHC CHC CHC CHC CHC CHC CHC CHC
WEATHER TYPE....RS RS RW RW RW RW RW RW RW RW RW RW
TSTM COV........
CWR.............30 30 30 30 30 30 30 30 30 30 30 30
TEMP............41 40 42 44 45 48 49 51 52 51 51 51
RH..............43 49 48 51 53 47 45 39 36 36 36 36
20 FT WIND DIR..W W W NW NW NW NW NW NW NW NW NW
20 FT WIND SPD..24 23 23 23 24 25 28 28 29 28 24 20
20 FT WIND GUST.33 32 32 33 33 35 38 38 40 38 33 26
MIX HGT (KFT)...0.7 1.3 3.9 3.9 4.3 4.6 5.6 6.3 6.1 7.8 7.0 6.2
TRANSP WIND DIR.W W NW NW NW NW NW NW NW NW NW NW
TRANSP WIND SPD.39 41 44 46 45 44 41 39 37 35 32 29
THURSDAY NIGHT
SKY/WEATHER.........MOSTLY CLOUDY (70-80 PERCENT). CHANCE OF RAIN
SHOWERS IN THE EVENING. CHANCE OF SNOW SHOWERS
EARLY IN THE EVENING.
MIN TEMPERATURE.....AROUND 27.
MAX HUMIDITY........85-90 PERCENT.
WIND (20 FT)........NORTH WINDS 10 TO 20 MPH WITH GUSTS TO AROUND
23 MPH.
CWR.................50 PERCENT.
MIXING HEIGHT.......1300 TO 1800 FT AGL.
TRANSPORT WINDS.....NORTHWEST 25 TO 30 MPH DECREASING TO AROUND 20
MPH AFTER 3 AM.
SMOKE DISPERSAL.....POOR.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........61 66 78 89 89 89 89 89 88 88 88 88
WEATHER COV.....CHC CHC CHC CHC CHC CHC CHC CHC CHC CHC CHC CHC
WEATHER TYPE....RW RW RS RS SW SW SW SW SW SW SW SW
TSTM COV........
CWR.............50 50 50 50 50 50 50 50 50 50 50 50
TEMP............48 44 40 37 34 32 31 30 29 29 28 27
RH..............40 49 59 67 75 82 81 81 85 83 87 85
20 FT WIND DIR..NW NW N N N N N N N N N N
20 FT WIND SPD..16 15 14 14 13 13 12 12 10 10 10 10
20 FT WIND GUST.23 23 23 21 21 20 20 20 18 18 17 17
MIX HGT (KFT)...5.4 4.4 3.4 2.5 2.4 2.3 2.2 2.1 2.0 1.9 1.6 1.3
TRANSP WIND DIR.NW N N N N N NW NW NW NW NW W
TRANSP WIND SPD.28 28 29 30 30 30 28 25 22 20 17 16
FRIDAY
SKY/WEATHER.........MOSTLY CLOUDY (70-80 PERCENT). CHANCE OF SNOW
SHOWERS IN THE MORNING, THEN SLIGHT CHANCE OF
SNOW SHOWERS IN THE AFTERNOON.
MAX TEMPERATURE.....AROUND 46.
MIN HUMIDITY........35 PERCENT.
WIND (20 FT)........NORTHWEST WINDS AROUND 10 MPH SHIFTING TO THE
WEST IN THE LATE MORNING AND AFTERNOON, THEN
SHIFTING TO THE NORTH LATE IN THE AFTERNOON.
GUSTS UP TO 21 MPH.
CWR.................25 PERCENT.
MIXING HEIGHT.......8700 TO 9200 FT AGL.
TRANSPORT WINDS.....WEST 15 TO 20 MPH.
SMOKE DISPERSAL.....VERY GOOD INCREASING TO EXCELLENT LATE IN THE
AFTERNOON.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........88 83 77 72 67 62 57 58 60 61 64 68
WEATHER COV.....CHC CHC CHC CHC CHC CHC SCH SCH SCH SCH SCH SCH
WEATHER TYPE....SW SW SW SW SW SW SW SW SW SW SW SW
TSTM COV........
CWR.............30 30 30 30 30 30 30 30 30 30 30 30
TEMP............27 28 29 30 33 37 40 43 45 46 46 45
RH..............87 83 77 72 61 52 44 38 36 35 35 38
20 FT WIND DIR..N NW NW NW W W W W W W W N
20 FT WIND SPD..10 10 9 9 9 10 12 13 13 13 13 12
20 FT WIND GUST.16 16 16 16 16 16 17 18 20 21 21 20
MIX HGT (KFT)...1.0 1.8 2.7 3.5 4.3 5.0 5.7 6.8 8.0 9.2 7.8 6.4
TRANSP WIND DIR.W W W W W W SW W W NW NW NW
TRANSP WIND SPD.16 15 15 15 16 16 17 18 20 20 20 18
FORECASTER...SE
REQUESTED BY...CASPER DISPATCH
TYPE OF REQUEST...WILDFIRE
.TAG 2611446.0/UNR
.DELDT 04/22/26
.FORMATTERVERSION 2.0.0
.EMAIL NATHANIELLOGEMANN16@GMAIL.COM
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page