Spot Forecast
Issued by NWS Rapid City, SD
Issued by NWS Rapid City, SD
608
FNUS73 KUNR 140141
FWSUNR
Spot Forecast for Beretta...USFS
National Weather Service Rapid City SD
741 PM MDT Sun Sep 13 2026
Forecast is based on forecast start time of 2000 MDT on September 13.
If conditions become unrepresentative, contact the National Weather
Service.
.DISCUSSION...Showers and thunderstorms are possible tonight with
a frontal passage expected Monday morning that will swing winds
from the south-to-southeast to out of the west-to-northwest. Light
winds and mostly terrain driven winds are expected Sunday evening
into Sunday night. Winds will swing to the west around 7AM to 9AM
Monday morning as the front tracks through.
For the thunderstorm chances, the forecast thinking is showers and
storms that are developing near central Wyoming will begin to
swing through the area around 9 to 11PM. Scattered showers will be
possible through most of the night. Severe weather is not
expected at this time but gusty winds, brief heavy rain, and
lightning will be likely with the stronger storm cells. After this
round of rain and storms, the next chance is Tuesday night.
.REST OF TONIGHT...
Sky/weather.........Mostly cloudy (75-85 percent). Chance of
showers and thunderstorms early in the evening,
then showers and thunderstorms likely in the
late evening and overnight.
Min temperature.....Around 57.
Max humidity........93 percent.
Wind (20 ft)........South winds around 10 mph. Gusts up to 31 mph
early in the evening then 28 mph overnight.
Gusty and erratic winds expected near
thunderstorms.
CWR.................50 percent.
Mixing height.......500 to 1000 ft agl.
Transport winds.....South around 25 mph.
Smoke dispersal.....Poor.
TIME (MDT) 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........96 83 84 86 92 89 96 95 84 62
Weather cov.....CHC LKY LKY LKY LKY LKY LKY LKY LKY LKY
Weather type....RW RW RW RW RW RW RW RW RW RW
Tstm cov........CHC LKY LKY LKY LKY LKY LKY LKY LKY LKY
CWR.............50 50 50 50 50 50 50 50 50 50
Temp............60 59 58 58 58 59 59 59 59 59
RH..............80 83 89 92 93 93 93 93 93 93
20 FT wind dir..SE SE S S S S S S S S
20 FT wind spd..10 9 9 9 10 10 10 9 9 9
20 FT wind gust.30 29 31 31 15 25 25 25 28 25
Mix hgt (kft)...1.2 1.0 1.2 0.9 0.7 0.6 0.5 0.5 0.5 0.5
Transp wind dir.S S S S S S S S S S
Transp wind spd.22 21 21 22 23 23 23 23 23 23
.MONDAY...
Sky/weather.........Mostly cloudy (70-80 percent) then becoming
mostly sunny (20-30 percent).
Max temperature.....Around 72.
Min humidity........24 percent.
Wind (20 ft)........South winds around 10 mph shifting to the west
early in the morning. Gusts up to 29 mph.
CWR.................0 percent.
Mixing height.......6400 to 6900 ft agl.
Transport winds.....Southwest around 25 mph shifting to the west 25
to 35 mph in the late morning and afternoon.
Smoke dispersal.....Good increasing to excellent in the afternoon.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........77 73 49 35 26 10 10 5 4 10 8 5
Weather cov.....
Weather type....
Tstm cov........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
Temp............60 62 63 65 66 68 69 70 70 71 70 68
RH..............84 78 72 65 56 47 39 32 27 25 24 27
20 FT wind dir..S S W NW NW NW W W W W W W
20 FT wind spd..9 8 9 8 8 10 12 13 12 12 12 12
20 FT wind gust.24 23 23 21 22 23 25 28 29 29 28 26
Mix hgt (kft)...0.5 0.6 1.2 2.0 2.8 3.9 5.0 5.6 6.2 6.9 6.4 5.9
Transp wind dir.SW SW W W W W W W W W W W
Transp wind spd.23 22 22 22 25 28 31 31 31 29 26 24
.MONDAY NIGHT...
Sky/weather.........Mostly clear (0-10 percent).
Min temperature.....Around 46.
Max humidity........72 percent.
Wind (20 ft)........Northwest winds 5 to 15 mph. Gusts up to 25 mph
decreasing to 15 mph after 3 am.
CWR.................0 percent.
Mixing height.......500 to 1000 ft agl.
Transport winds.....Northwest 25 to 30 mph decreasing to 10 to 20
mph after 3 am.
Smoke dispersal.....Poor.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........5 2 5 7 3 5 7 3 9 6 8 7
Weather cov.....
Weather type....
Tstm cov........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
Temp............67 60 60 58 56 55 53 51 50 49 48 47
RH..............29 37 39 42 45 49 52 61 63 66 72 71
20 FT wind dir..NW NW NW NW NW NW NW NW NW NW NW W
20 FT wind spd..10 10 13 13 13 12 10 9 7 6 6 5
20 FT wind gust.24 23 24 24 25 25 25 22 18 15 13 12
Mix hgt (kft)...5.5 4.1 2.7 1.4 1.1 0.9 0.6 0.6 0.6 0.5 0.5 0.5
Transp wind dir.W W NW NW NW NW NW NW NW NW NW W
Transp wind spd.22 22 23 25 26 28 26 24 21 17 14 10
.TUESDAY...
Sky/weather.........Sunny (10-20 percent).
Max temperature.....Around 67.
Min humidity........38 percent.
Wind (20 ft)........Southwest winds around 5 mph shifting to the
south early in the morning, then shifting to
the southeast with gusts to around 12 mph late
in the morning increasing to 10 to 15 mph with
gusts to around 32 mph late in the morning.
CWR.................0 percent.
Mixing height.......5100 to 5600 ft agl.
Transport winds.....West around 10 mph shifting to the southwest
late in the morning, then increasing to south
20 to 30 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 (%).........9 22 14 5 6 6 7 11 15 19 18 18
Weather cov.....
Weather type....
Tstm cov........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
Temp............47 46 49 54 58 62 64 66 67 67 66 65
RH..............69 70 62 52 47 44 42 40 38 38 38 39
20 FT wind dir..W SW S SE SE SE SE SE SE SE SE SE
20 FT wind spd..3 2 2 2 3 6 8 9 10 12 12 12
20 FT wind gust.9 9 7 8 12 17 22 25 29 31 32 31
Mix hgt (kft)...0.5 1.0 1.6 2.1 3.0 3.8 4.6 4.9 5.3 5.6 5.1 4.6
Transp wind dir.W W SW SW SW S S S S S S S
Transp wind spd.7 6 6 7 10 14 18 21 24 25 26 26
$$
Forecaster...GS
Requested by...Ryan Flynn
Type of request...WILDFIRE
.TAG 2621799.0/UNR
.DELDT 09/13/26
.FormatterVersion 2.0.0
.EMAIL Cory.Fischer@usda.gov,sdgpc@firenet.gov,Wayne.yanders@usda.gov,Sean.Weber@State.sd.us