Spot Forecast
Issued by NWS Rapid City, SD
Issued by NWS Rapid City, SD
019
FNUS73 KUNR 281156
FWSUNR
Spot Forecast for Antihorse Alpha...USFS
National Weather Service Rapid City SD
556 AM MDT Wed Oct 28 2026
Forecast is based on ignition time of 0700 MDT on October 28.
If conditions become unrepresentative, contact the National Weather
Service.
.DISCUSSION...A weak disturbance is crossing the region this
morning and TRYING to produce a few light showers over the general
burn area. However, confidence on anything reaching the ground is
low as the surface is quite dry...some of what is seen on radar
is likely virga and evaporating before reaching the ground.
Regardless, no wetting rain will occur, and everything (both
clouds and showers) should end and clear out by 9-10 AM.
Thereafter, the forecast remains unchanged...somewhat zonal west-
southwest flow aloft is expected through Friday, with only a few
minor waves drifting through. At this time, none of these little
waves/disturbances look organized enough to produce periods of
strong winds or any precipitation, with mild daytime temperatures
in the 50s supported throughout the period. A switch in diurnal
surface winds to more southeasterly on Friday will result in a
notable increase in minimum afternoon relative humidity values
compared to today and Thursday. Forecast confidence is moderate
to high.
.TODAY...
Sky/weather.........Partly cloudy (55-65 percent) then becoming
sunny (10-20 percent).
Max temperature.....Around 50 degrees.
Min humidity........39 percent.
Wind (20 ft)........West winds around 10 mph decreasing to around 5
mph late in the afternoon. Gusts up to 15 mph.
CWR.................0 percent.
Mixing height.......4900 to 5400 ft agl.
Transport winds.....West 15 to 20 mph decreasing to around 10 mph
late in the afternoon.
Smoke dispersal.....Good.
TIME (MDT) 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........72 51 23 12 4 2 2 3 4 3 4
Weather cov.....
Weather type....
Tstm cov........
CWR.............0 0 0 0 0 0 0 0 0 0 0
Temp............41 41 42 44 45 47 48 49 49 48 44
RH..............60 65 67 65 61 52 46 42 40 40 48
20 FT wind dir..W W W W W W W W W W W
20 FT wind spd..6 6 6 6 7 7 8 8 7 6 3
20 FT wind gust.10 11 12 15 15 15 15 15 15 14 11
Mix hgt (kft)...1.1 0.6 0.8 1.9 2.9 3.8 4.3 4.5 5.4 3.7 2.2
Transp wind dir.NW NW NW NW W W W W W W W
Transp wind spd.15 15 15 16 17 18 18 17 15 12 8
.TONIGHT...
Sky/weather.........Mostly clear (5-15 percent).
Min temperature.....Around 35 degrees.
Max humidity........59 percent.
Wind (20 ft)........Winds becoming light and variable at up
to about 5 mph. Gusts less than 10 mph.
CWR.................0 percent.
Mixing height.......400 to 900 ft agl.
Transport winds.....Southwest around 10 mph shifting to the
southeast early in the evening.
Smoke dispersal.....Poor.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........4 5 6 7 8 16 20 18 20 16 12 11
Weather cov.....
Weather type....
Tstm cov........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
Temp............40 38 36 36 36 36 37 36 37 36 36 36
RH..............55 54 54 52 52 54 54 54 52 54 54 56
20 FT wind dir..W SW S SE SE SE SE SE S S S S
20 FT wind spd..2 2 3 5 5 6 6 6 5 5 5 3
20 FT wind gust.7 7 8 9 10 10 11 10 10 10 10 9
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.SW SW SE SE SE SE SE SE S S S S
Transp wind spd.6 6 7 9 12 13 15 15 15 15 13 10
.THURSDAY...
Sky/weather.........Mostly sunny (10-20 percent).
Max temperature.....Around 53 degrees.
Min humidity........37 percent.
Wind (20 ft)........South winds around 5 mph with gusts to around
10 mph shifting to the southwest with gusts to
around 15 mph in the late morning and
afternoon.
CWR.................0 percent.
Mixing height.......3000 to 3500 ft agl.
Transport winds.....South 10 to 15 mph shifting to the southwest 15
to 20 mph in the afternoon, then shifting to
the southeast around 10 mph late in the
afternoon.
Smoke dispersal.....Fair.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........11 18 20 10 6 9 10 12 14 15 22 28
Weather cov.....
Weather type....
Tstm cov........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
Temp............36 35 37 40 44 47 49 50 52 52 51 48
RH..............56 59 59 57 53 49 48 44 39 38 37 42
20 FT wind dir..S S S SW SW SW SW SW SW SW SW S
20 FT wind spd..3 2 2 3 5 6 6 6 6 6 5 5
20 FT wind gust.9 9 8 8 9 12 13 14 15 14 12 9
Mix hgt (kft)...0.5 0.5 0.5 0.6 1.3 2.1 2.9 3.1 3.3 3.5 2.4 1.3
Transp wind dir.S S S S SW SW SW SW W W SW SE
Transp wind spd.8 7 7 8 10 14 17 17 16 14 12 9
$$
Forecaster...KS
Requested by...Madison Tolley
Type of request...PRESCRIBED
.TAG 2624590.1/UNR
.DELDT 10/28/26
.FormatterVersion 2.0.0
.EMAIL madison.tolley@usda.gov