789
FNUS73 KUNR 261228
FWSUNR
SPOT FORECAST FOR ANTIHORSE ALPHA...USFS
NATIONAL WEATHER SERVICE RAPID CITY SD
628 AM MDT MON OCT 26 2026
FORECAST IS BASED ON IGNITION TIME OF 0659 MDT ON OCTOBER 26.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
THE BURN AREA WILL RESIDE ALONG THE WESTERN EDGE OF
A VERY MOIST, DREARY, UNSETTLED AIRMASS TODAY AS A LOW PRESSURE
SYSTEM LIFTS NORTHEAST ACROSS THE REGION. TEMPERATURES WILL HOLD
QUITE COLD AS WELL. THE STEADIEST DRIZZLE AND RAIN IS STRONGLY
FAVORED EAST OF THE BURN (AND ESPECIALLY OUT ON THE PLAINS), SO
WHILE PERIODIC LIGHT RAIN, LIGHT SNOW, AND/OR DRIZZLE WILL BE
POSSIBLE THIS MORNING THROUGH EARLY AFTERNOON, CONFIDENCE IN
SEEING STEADY OR LONG-LASTING PERIODS OF PRECIPITATION IS LOW,
AND ANY ACCUMULATIONS OF RAIN AND SNOW ARE LOOKING LOW. CONFIDENCE
IN DRY CONDITIONS INCREASES SIGNIFICANTLY STARTING AROUND 2 TO 3
PM THIS AFTERNOON, WITH SOME LINGERING CLOUDS AND PATCHY FOG
THROUGH TONIGHT. THE AREA WILL CLEAR OUT AND DRY OUT TUESDAY WITH
HIGH TEMPERATURES REBOUNDING INTO THE 50S BY AFTERNOON. NOTE BELOW
THAT RELATIVE HUMIDITY VALUES WILL DRY OUT INTO UPPER-20-PERCENT
TERRITORY AND WINDS WILL INCREASE AND BECOME GUSTY FROM LATE
MORNING THROUGH EARLY EVENING TUESDAY, SO A VERY DIFFERENT PATTERN
COMPARED TO TODAY. WEDNESDAY WILL CONTINUE TO BE MILD AND DRY,
BUT WITH LIGHTER WINDS COMPARED TO TUESDAY.
TODAY
SKY/WEATHER.........MOSTLY CLOUDY (70-80 PERCENT). CHANCE OF LIGHT
SNOW AND/OR DRIZZLE EARLY IN THE MORNING, MIXING
WITH LIGHT RAIN BY LATE MORNING. PATCHY FOG.
MAX TEMPERATURE.....AROUND 40 DEGREES.
MIN HUMIDITY........80 PERCENT.
WIND (20 FT)........EAST WINDS AROUND 5 MPH SHIFTING TO THE
SOUTHEAST WITH GUSTS TO AROUND 13 MPH IN THE
LATE MORNING AND EARLY AFTERNOON, THEN SHIFTING
TO THE SOUTH WITH GUSTS TO AROUND 13 MPH LATE
IN THE AFTERNOON.
CWR.................30 PERCENT.
MIXING HEIGHT.......1000 TO 1500 FT AGL.
TRANSPORT WINDS.....SOUTHEAST 10 TO 15 MPH.
SMOKE DISPERSAL.....POOR.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........88 94 95 93 91 84 84 89 88 76 71 56
WEATHER COV.....CHC CHC CHC CHC CHC CHC CHC CHC PTY PTY PTY PTY
WEATHER TYPE....SN SN SN SNF RNF RNF RNF RNF FOG FOG FOG FOG
TSTM COV........
CWR.............30 30 30 30 30 30 30 25 10 10 0 0
TEMP............32 31 32 34 37 37 37 38 39 40 39 38
RH..............85 91 95 98 99 100 97 92 90 88 88 88
20 FT WIND DIR..E E E E SE SE SE SE S S S SE
20 FT WIND SPD..2 2 2 3 5 5 6 6 7 7 7 6
20 FT WIND GUST.7 7 7 8 8 10 12 12 13 13 13 12
MIX HGT (KFT)...0.6 0.5 0.6 0.9 1.1 1.2 1.2 1.3 1.3 1.5 1.3 1.0
TRANSP WIND DIR.E E E E SE SE SE SE SE SE SE SE
TRANSP WIND SPD.8 8 8 8 9 9 10 12 12 12 12 10
TONIGHT
SKY/WEATHER.........MOSTLY CLOUDY (60-70 PERCENT). PATCHY FOG.
MIN TEMPERATURE.....AROUND 31 DEGREES.
MAX HUMIDITY........96 PERCENT.
WIND (20 FT)........SOUTHEAST WINDS AROUND 10 MPH.
CWR.................0 PERCENT.
MIXING HEIGHT.......400 TO 900 FT AGL.
TRANSPORT WINDS.....SOUTHEAST 10 TO 15 MPH SHIFTING TO THE SOUTH
AFTER 3 AM.
SMOKE DISPERSAL.....POOR.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........40 42 48 60 57 59 71 71 66 68 64 54
WEATHER COV.....PTY PTY PTY PTY PTY PTY PTY PTY PTY PTY PTY PTY
WEATHER TYPE....FOG FOG FOG FOG FOG FOG FOG FOG FOG FOG FOG FOG
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
TEMP............35 34 33 33 33 33 34 34 34 34 36 35
RH..............96 96 96 96 96 96 96 96 96 96 92 92
20 FT WIND DIR..SE SE SE SE SE SE SE SE SE SE SE S
20 FT WIND SPD..6 6 6 6 7 8 8 9 9 9 9 10
20 FT WIND GUST.12 12 13 14 14 15 15 14 15 15 15 15
MIX HGT (KFT)...0.5 0.4 0.4 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5
TRANSP WIND DIR.SE SE SE SE SE SE SE SE S S S S
TRANSP WIND SPD.10 10 12 12 13 13 14 14 14 15 14 14
TUESDAY
SKY/WEATHER.........MOSTLY SUNNY (20-30 PERCENT).
MAX TEMPERATURE.....AROUND 52 DEGREES.
MIN HUMIDITY........29 PERCENT.
WIND (20 FT)........SOUTH WINDS 9 TO 15 MPH WITH GUSTS TO AROUND
18 MPH SHIFTING TO THE WEST 15 TO 20 MPH WITH
GUSTS TO AROUND 37 MPH IN THE LATE MORNING AND
AFTERNOON.
CWR.................0 PERCENT.
MIXING HEIGHT.......4700 TO 5200 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 15 TO 25 MPH INCREASING TO WEST 30 TO
40 MPH LATE IN THE MORNING, THEN INCREASING TO
AROUND 40 MPH EARLY IN THE AFTERNOON DECREASING
TO 25 TO 30 MPH LATE IN THE AFTERNOON.
SMOKE DISPERSAL.....GOOD INCREASING TO EXCELLENT IN THE AFTERNOON,
THEN DECREASING TO FAIR LATE IN THE AFTERNOON.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........46 38 51 43 21 23 7 7 2 1 2 2
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
TEMP............34 33 36 40 44 46 48 49 50 52 50 49
RH..............96 96 96 89 73 65 54 42 34 29 29 30
20 FT WIND DIR..S S SW SW SW W W W W W W W
20 FT WIND SPD..9 9 10 11 12 16 17 20 20 18 17 12
20 FT WIND GUST.13 14 16 20 25 30 33 36 37 36 35 26
MIX HGT (KFT)...0.5 0.8 1.0 1.3 2.0 2.6 3.3 3.9 4.6 5.2 3.7 2.2
TRANSP WIND DIR.S S SW SW W W W W W W W W
TRANSP WIND SPD.15 17 21 24 30 35 39 40 39 36 30 23
FORECASTER...KSMITH
REQUESTED BY...MADISON TOLLEY
TYPE OF REQUEST...PRESCRIBED
.TAG 2624394.1/UNR
.DELDT 10/26/26
.FORMATTERVERSION 2.0.0
.EMAIL MADISON.TOLLEY@USDA.GOV
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page