554
FNUS73 KUNR 211340
FWSUNR
SPOT FORECAST FOR SUNDANCE...SDWF
NATIONAL WEATHER SERVICE RAPID CITY SD
740 AM MDT SAT MAR 21 2026
FORECAST IS BASED ON FORECAST START TIME OF 0800 MDT ON MARCH 21.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE.
..RED FLAG WARNING IN EFFECT UNTIL 9 PM MDT THIS EVENING
DISCUSSION
RECORD BREAKING WARMTH AND CRITICAL FIRE WEATHER
CONDITIONS WILL DEVELOP TODAY. HIGH TEMPS WILL BE IN THE MID TO
UPPER 80S, WITH RELATIVE HUMIDITY BOTTOMING OUT AROUND 8 PERCENT.
LIGHTER, DIURNAL WINDS WILL PERSIST THROUGH 10AM, WITH STRONGER
WESTERLY WINDS DEVELOPING AFTER 11AM-NOON. GUSTS ON EXPOSED
UPPER SLOPES AROUND 20 TO 25 MPH DURING PEAK HEATING 2PM-5PM.
A COOL FRONT WILL PUSH THROUGH AROUND 5PM-7PM, SHIFTING WINDS
NORTH TO NORTHEAST THROUGH THE OVERNIGHT HOURS, ALTHOUGH WIND
SPEEDS WILL DIMINISH AFTER MIDNIGHT. SPOTTY RAIN SHOWERS POSSIBLE
OVERNIGHT TONIGHT THROUGH LATE MORNING SUNDAY: TOTAL LIQUID
ACCUMULATION AROUND 0.01-0.03".
ELEVATED TO NEAR-CRITICAL FIRE WEATHER CONDITIONS RETURN MONDAY
THROUGH AT LEAST THE MIDDLE OF NEXT WEEK.
REST OF TODAY
SKY/WEATHER.........SUNNY (15-25 PERCENT).
MAX TEMPERATURE.....AROUND 87.
MIN HUMIDITY........8 PERCENT.
WIND (20 FT)........WEST WINDS 10 MPH WITH GUSTS TO AROUND 20
MPH INCREASING TO AROUND 20 MPH WITH GUSTS TO
AROUND 30 MPH LATE IN THE AFTERNOON.
CWR.................0 PERCENT.
MIXING HEIGHT.......5500 TO 6000 FT AGL INCREASING TO 12000 TO
13000 FT AGL LATE IN THE AFTERNOON.
TRANSPORT WINDS.....WEST 15 TO 25 MPH INCREASING TO 35 TO 40 MPH.
SMOKE DISPERSAL.....GOOD INCREASING TO EXCELLENT LATE IN THE
AFTERNOON.
TIME (MDT) 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........13 12 9 10 9 9 9 14 29 32
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0
TEMP............48 55 61 67 73 79 83 85 84 81
RH..............34 28 23 19 15 12 10 9 9 9
20 FT WIND DIR..NW W W W W W W W W W
20 FT WIND SPD..7 8 9 10 13 15 17 18 18 18
20 FT WIND GUST.10 13 14 16 20 24 26 28 29 29
MIX HGT (KFT)...0.4 0.5 1.3 2.0 3.0 4.1 5.9 13 9.7 9.2
TRANSP WIND DIR.W W W W SW W W W W W
TRANSP WIND SPD.13 14 15 17 21 26 32 36 36 33
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY (40-50 PERCENT) THEN BECOMING
MOSTLY CLOUDY (60-70 PERCENT). SLIGHT CHANCE OF
RAIN LATE OVERNIGHT.
MIN TEMPERATURE.....AROUND 43.
MAX HUMIDITY........70 PERCENT.
WIND (20 FT)........WEST WINDS AROUND 20 MPH WITH GUSTS TO 28 MPH
SHIFTING NORTH, THEN NORTHEAST WITH GUSTS
TO AROUND 25 MPH VERY EARLY IN THE EVENING, THEN
SHIFTING EAST-NORTHEAST WITH GUSTS TO AROUND
20 MPH LATE IN THE EVENING, DECREASING TO 10 TO
15 MPH OVERNIGHT.
CWR.................5 PERCENT.
MIXING HEIGHT.......700 TO 1200 FT AGL.
TRANSPORT WINDS.....NORTHWEST 30 TO 35 MPH SHIFTING TO THE
NORTHEAST 30 TO 40 MPH EARLY IN THE EVENING,
THEN BECOMING NORTH 20 TO 25 MPH OVERNIGHT
SHIFTING TO THE NORTHWEST AROUND 15 MPH AFTER 3
AM SHIFTING TO THE WEST.
SMOKE DISPERSAL.....POOR.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........45 38 50 55 56 45 38 56 67 74 74 77
WEATHER COV..... SCH SCH SCH SCH SCH SCH
WEATHER TYPE.... RN RN RN RN RN RN
TSTM COV........
CWR.............0 0 0 0 0 0 5 5 5 5 5 5
TEMP............77 73 67 62 58 54 50 48 46 44 43 43
RH..............12 15 19 30 37 45 54 58 60 65 67 70
20 FT WIND DIR..SW SW SE E E NE NE NE NE N NE E
20 FT WIND SPD..18 18 18 18 17 16 15 14 10 9 7 6
20 FT WIND GUST.28 26 25 25 25 24 24 22 20 18 16 14
MIX HGT (KFT)...3.6 0.7 0.7 0.9 1.1 1.3 1.5 1.4 1.3 1.1 1.2 1.4
TRANSP WIND DIR.W NW N NE NE NE NE N N N NW W
TRANSP WIND SPD.31 29 28 29 32 36 37 32 24 16 14 12
SUNDAY
SKY/WEATHER.........MOSTLY CLOUDY (65-75 PERCENT) THEN BECOMING
MOSTLY SUNNY (30-40 PERCENT). SLIGHT CHANCE OF
RAIN IN THE MORNING.
MAX TEMPERATURE.....AROUND 58.
MIN HUMIDITY........29 PERCENT.
WIND (20 FT)........EAST WINDS AROUND 10 MPH SHIFTING TO THE SOUTH
EARLY IN THE MORNING, THEN SHIFTING TO THE
SOUTHWEST LATE IN THE MORNING SHIFTING TO THE
WEST IN THE AFTERNOON SHIFTING TO THE
NORTHWEST. GUSTS UP TO 18 MPH INCREASING TO 22
MPH IN THE AFTERNOON.
CWR.................5 PERCENT.
MIXING HEIGHT.......6000 TO 6500 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 10 TO 20 MPH SHIFTING TO THE
NORTHWEST 20 TO 25 MPH IN THE AFTERNOON.
SMOKE DISPERSAL.....GOOD INCREASING TO VERY GOOD LATE IN THE
AFTERNOON.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........84 80 79 78 71 63 56 45 35 24 23 23
WEATHER COV.....SCH SCH SCH SCH SCH SCH
WEATHER TYPE....RN RN RN RN RN RN
TSTM COV........
CWR.............5 5 5 5 5 5 0 0 0 0 0 0
TEMP............43 43 43 44 46 49 52 54 56 58 58 57
RH..............70 67 67 65 60 54 46 41 35 32 29 29
20 FT WIND DIR..E SE S SW SW W W W W W NW NW
20 FT WIND SPD..6 6 6 6 7 8 9 10 12 12 12 10
20 FT WIND GUST.13 10 10 12 14 16 18 21 22 22 21 20
MIX HGT (KFT)...1.5 1.6 1.7 1.8 2.1 2.4 2.7 4.0 5.2 6.5 5.4 4.4
TRANSP WIND DIR.SW SW S S SW W W W W NW NW NW
TRANSP WIND SPD.12 10 9 10 12 14 16 20 21 22 21 18
FORECASTER...SR
REQUESTED BY...IC
TYPE OF REQUEST...WILDFIRE
.TAG 2606982.0/UNR
.DELDT 03/21/26
.FORMATTERVERSION 2.0.0
.EMAIL COLINWARREN068@ICLOUD.COM
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page