517
FNUS73 KUNR 101949
FWSUNR
SPOT FORECAST FOR LOOKOUT...SDS WILDLAND FIRE
NATIONAL WEATHER SERVICE RAPID CITY SD
149 PM MDT THU SEP 10 2026
FORECAST IS BASED ON FORECAST START TIME OF 1300 MDT ON SEPTEMBER 10.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
HOT AND DRY CONDITIONS THIS AFTERNOON (WITH VERY POOR
OVERNIGHT RELATIVE HUMIDITY RECOVERY TONIGHT) WILL START TO EASE
FRIDAY (SLIGHTLY COOLER AND SLIGHTLY LESS DRY), BUT WINDS WILL
INCREASE FRIDAY OUT OF THE WEST TRENDING NORTH WITH TIME AT 15-20
MPH GUSTING AS HIGH AS 30 MPH AS A SOMEWHAT DIFFUSE COOL FRONT
PUSHES THROUGH THE REGION. HIGH RESOLUTION MODELS ARE HINTING AT
CLOUD BUILDUPS AND PERHAPS A FEW SHOWERS LATE FRIDAY AFTERNOON
INTO FRIDAY NIGHT, BUT INSTABILITY WILL BE EXTREMELY LIMITED AND
THE LOW-LEVELS WILL STILL LEAN QUITE DRY. IT'S POSSIBLE THIS
ACTIVITY MANIFESTS AS MORE VIRGA THAN BONAFIDE SHOWERS WITH
LITTLE RAINFALL REACHING THE GROUND. WETTING RAINS ARE CERTAINLY
NOT EXPECTED AT THIS TIME. THE POTENTIAL FOR SHOWERS WILL
INCREASE MUCH MORE SATURDAY NIGHT AND SUNDAY IN ASSOCIATION WITH
OUR NEXT APPROACHING LOW PRESSURE SYSTEM, WITH THE WEEKEND
GENERALLY TRENDING COOLER AND MORE MOIST. WATCH FOR BREEZY
CONDITIONS LOOKING AHEAD TO SUNDAY AND MONDAY.
REST OF TODAY
SKY/WEATHER.........SUNNY (5-15 PERCENT).
MAX TEMPERATURE.....AROUND 89 DEGREES.
MIN HUMIDITY........13 PERCENT.
WIND (20 FT)........WEST-NORTHWEST WINDS AROUND 10 MPH WITH GUSTS TO
AROUND 20 MPH.
CWR.................0 PERCENT.
MIXING HEIGHT.......8500 TO 9000 FT AGL.
TRANSPORT WINDS.....WEST 15 TO 20 MPH.
SMOKE DISPERSAL.....VERY GOOD.
TIME (MDT) 1PM 2PM 3PM 4PM 5PM
SKY (%).........6 7 9 7 8
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0
TEMP............88 88 89 89 87
RH..............17 15 14 14 15
20 FT WIND DIR..W W W W SW
20 FT WIND SPD..7 8 9 8 7
20 FT WIND GUST.20 20 20 18 16
MIX HGT (KFT)...7.8 8.2 9.0 8.1 7.4
TRANSP WIND DIR.W W W W W
TRANSP WIND SPD.16 16 16 15 13
TONIGHT
SKY/WEATHER.........PARTLY TO MOSTLY CLOUDY (25-60 PERCENT).
MIN TEMPERATURE.....AROUND 62 DEGREES.
MAX HUMIDITY........28 PERCENT.
WIND (20 FT)........SOUTH WINDS 5 TO 10 MPH WITH GUSTS TO AROUND 14
MPH SHIFTING TO THE SOUTHWEST.
CWR.................0 PERCENT.
MIXING HEIGHT.......500 TO 1000 FT AGL.
TRANSPORT WINDS.....SOUTHWEST AROUND 15 MPH SHIFTING TO THE WEST.
SMOKE DISPERSAL.....POOR.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........9 33 49 50 58 59 54 53 42 32 27 26
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
TEMP............83 78 73 70 67 66 65 64 63 63 62 63
RH..............16 17 21 25 27 26 26 26 27 26 24 24
20 FT WIND DIR..SW S S S S S S S SW SW SW SW
20 FT WIND SPD..6 5 7 8 8 7 6 6 6 6 7 8
20 FT WIND GUST.14 14 13 13 12 11 8 8 8 7 8 10
MIX HGT (KFT)...3.2 0.6 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5
TRANSP WIND DIR.W SW SW S S S S S SW SW SW W
TRANSP WIND SPD.12 12 13 13 13 12 10 9 8 9 13 17
FRIDAY
SKY/WEATHER.........SUNNY (10-25 PERCENT). SOME INCREASE IN CLOUD
DEVELOPMENT POSSIBLE BY LATE AFTERNOON.
MAX TEMPERATURE.....AROUND 81 DEGREES.
MIN HUMIDITY........24 PERCENT.
WIND (20 FT)........WEST WINDS 15 TO 20 MPH SHIFTING TO THE NORTH
LATE IN THE AFTERNOON. GUSTS UP TO 30 MPH.
CWR.................0 PERCENT.
MIXING HEIGHT.......8000 TO 8500 FT AGL.
TRANSPORT WINDS.....WEST 25 TO 30 MPH SHIFTING TO THE NORTHWEST
LATE IN THE AFTERNOON.
SMOKE DISPERSAL.....GOOD INCREASING TO EXCELLENT LATE IN THE
MORNING.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........23 37 14 4 7 2 6 18 14 12 14 16
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
TEMP............64 64 67 71 73 75 77 77 78 80 80 78
RH..............25 28 28 28 28 28 29 30 30 28 28 30
20 FT WIND DIR..SW SW W W W W NW NW NW NW NW N
20 FT WIND SPD..15 17 17 18 20 20 20 20 20 18 18 18
20 FT WIND GUST.21 24 25 28 28 29 29 30 29 29 28 26
MIX HGT (KFT)...0.5 0.5 0.9 2.0 3.1 4.5 6.1 6.9 7.7 8.5 7.2 5.9
TRANSP WIND DIR.W W W W W W W W W NW NW N
TRANSP WIND SPD.22 25 28 29 30 30 30 30 29 29 28 26
FRIDAY NIGHT
SKY/WEATHER.........PARTLY CLOUDY (35-45 PERCENT) THEN BECOMING
MOSTLY CLOUDY (55-65 PERCENT). SLIGHT CHANCE
OF RAIN SHOWERS.
MIN TEMPERATURE.....AROUND 48 DEGREES.
MAX HUMIDITY........86 PERCENT.
WIND (20 FT)........NORTH WINDS 15 TO 20 MPH WITH GUSTS TO AROUND
24 MPH DECREASING TO AROUND 10 MPH WITH GUSTS
TO AROUND 13 MPH LATE IN THE EVENING, THEN
BECOMING LIGHT OVERNIGHT.
CWR.................15 PERCENT.
MIXING HEIGHT.......500 TO 1000 FT AGL.
TRANSPORT WINDS.....NORTHEAST 20 TO 25 MPH DECREASING TO 10 TO
15 MPH LATE IN THE EVENING, THEN SHIFTING TO
THE EAST EARLY IN THE MORNING.
SMOKE DISPERSAL.....POOR.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........30 49 60 34 27 20 10 9 12 42 33 27
WEATHER COV.....SCH SCH SCH SCH SCH SCH CHC CHC CHC CHC CHC CHC
WEATHER TYPE....RW RW RW RW RW RW RW RW RW RW RW RW
TSTM COV........
CWR.............15 15 15 15 15 15 15 15 15 15 15 15
TEMP............73 69 66 62 59 56 54 53 52 50 49 48
RH..............33 36 40 48 55 62 66 71 74 80 83 86
20 FT WIND DIR..N N N N N N NW NW N W N N
20 FT WIND SPD..17 16 15 12 6 3 2 1 0 1 0 0
20 FT WIND GUST.24 24 23 20 13 8 7 5 5 5 3 3
MIX HGT (KFT)...4.6 3.3 1.9 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5
TRANSP WIND DIR.N N NE NE NE NE NE NE NE NE E E
TRANSP WIND SPD.25 23 21 18 17 15 13 12 9 8 7 7
FORECASTER...KSMITH
REQUESTED BY...LAURA STEE
TYPE OF REQUEST...WILDFIRE
.TAG 2621595.0/UNR
.DELDT 09/10/26
.FORMATTERVERSION 2.0.0
.EMAIL SDGPC@FIRENET.GOV,BRANDON.HABER@STATE.SD.US,JAKE.MURDIE@STATE.SD.US
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page