Spot Forecast
Issued by NWS Cheyenne, WY
Issued by NWS Cheyenne, WY
308
FNUS75 KCYS 262123
FWSCYS
Spot Forecast for Carnegie RX...NPS
National Weather Service Cheyenne WY
323 PM MDT Fri Sep 26 2025
If conditions become unrepresentative, contact the National Weather
Service at (307) 772-2227
.DISCUSSION...
Dry conditions are expected through the weekend with min RH values
dipping down into the lower to mid 20s during the afternoon hours
with good overnight recovery. Smoke dispersal becomes fair around
9AM and better around 11AM then good around 1PM. Highs Saturday
will top out into the upper 70s and slightly warmer on Sunday with
highs in the mid 80s. Expect southerly winds 10 to 15 mph,
gusting up to 25 mph. Into next week, weather conditions will
continue to remain dry with highs in the mid 70s to lowers 80s and
min RH values generally in the low to mid 20s.
.SATURDAY...
Sky/weather.........Sunny (0-10 percent).
CWR.................0 percent.
Max temperature.....Around 80.
Min humidity........22 percent.
Wind (20 ft)........Southeast winds 5 to 12 mph.
Mixing height.......4300 ft AGL.
Transport winds.....South 8 to 16 mph increasing to 18 to 21 mph in
the afternoon.
Smoke dispersal.....Poor (4000 knot-ft) early in the morning
increasing to good (77900 knot-ft) in the
afternoon.
TIME (MDT) 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........3 4 3 2 2 2 3 7 7 6
Weather cov.....
Weather type....
Tstm cov........
CWR.............0 0 0 0 0 0 0 0 0 0
Temp............47 55 65 69 73 76 78 78 79 77
RH..............76 61 38 32 27 23 22 22 22 24
20 FT wind dir..SE SE SE S S S S S S S
20 FT wind spd..5 6 7 9 10 12 12 12 12 12
20 FT wind gust.12 14 17 21 23 24 25 24 24 24
Mix hgt (kft)...0.6 1.3 1.9 2.5 3.3 3.6 4.1 4.3 4.3 4.0
Transp wind dir.SE S S S S S S S S S
Transp wind spd.8 12 14 16 18 18 20 21 21 21
SDspl kt-ft/10004 13 23 35 53 58 70 77 78 72
.SATURDAY NIGHT...
Sky/weather.........Mostly clear (0-10 percent).
CWR.................0 percent.
Min temperature.....Around 49.
Max humidity........83 percent.
Wind (20 ft)........South winds 7 to 12 mph.
Mixing height.......800 ft AGL.
Transport winds.....South 18 to 22 mph.
Smoke dispersal.....Poor (14400 knot-ft).
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........6 3 6 7 6 5 5 4 4 4 5 8
Weather cov.....
Weather type....
Tstm cov........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
Temp............74 69 62 59 58 56 55 54 52 51 50 50
RH..............28 35 44 51 53 57 61 66 70 74 76 78
20 FT wind dir..S S S S S S S S S S S S
20 FT wind spd..12 12 12 12 10 10 9 9 8 8 8 7
20 FT wind gust.24 24 24 24 23 22 22 21 20 20 18 17
Mix hgt (kft)...2.1 1.3 1.2 1.0 1.0 1.0 0.9 0.9 0.9 0.9 0.9 0.8
Transp wind dir.S S S S S S S S S S S S
Transp wind spd.18 18 20 21 22 22 21 21 20 20 20 20
SDspl kt-ft/100034 21 20 18 19 18 16 16 15 15 15 14
.SUNDAY...
Sky/weather.........Sunny (20-30 percent).
CWR.................0 percent.
Max temperature.....Around 86.
Min humidity........23 percent.
Wind (20 ft)........South winds 7 to 12 mph.
Mixing height.......8200 ft AGL.
Transport winds.....South 14 to 20 mph.
Smoke dispersal.....Poor (9400 knot-ft) early in the morning
increasing to very good (106800 knot-ft) in the
afternoon.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........9 9 7 4 6 7 9 16 24 31 38 45
Weather cov.....
Weather type....
Tstm cov........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
Temp............49 53 57 61 68 74 81 82 84 85 83 81
RH..............83 77 75 70 54 41 30 27 25 23 25 28
20 FT wind dir..S S S S S S S S S S S S
20 FT wind spd..7 8 8 9 10 10 12 12 12 12 12 10
20 FT wind gust.17 16 17 18 20 22 23 24 24 24 24 24
Mix hgt (kft)...0.8 0.6 0.6 1.0 1.8 3.0 4.3 6.1 7.7 8.2 6.6 4.0
Transp wind dir.S S S S S S S S S S S S
Transp wind spd.20 18 17 16 15 14 14 14 15 15 15 16
SDspl kt-ft/100014 10 9 14 23 36 52 74 100 107 85 56
$$
Forecaster...Zawislak
Requested by...Kenn Perreault
Type of request...PRESCRIBED
.TAG 2522585.1/CYS
.DELDT 09/26/25
.FormatterVersion 2.0.0
.EMAIL ian_muirhead@nps.gov,kenn_perreault@nps.gov