Spot Forecast
Issued by NWS Cheyenne, WY
Issued by NWS Cheyenne, WY
761
FNUS75 KCYS 271140
FWSCYS
Spot Forecast for Carnegie RX...NPS
National Weather Service Cheyenne WY
540 AM MDT Sat Sep 27 2025
If conditions become unrepresentative, contact the National Weather
Service at (307) 772-2227
.DISCUSSION...
Sunny today with westerly winds gusting to around 20 to 25 mph this
afternoon and evening. Winds are expected to remain elevated into the
overnight hours, gusting to around 15 to 20 mph. Dry conditions again
today as relative humidity values drop into the 20 to 25 percent range
this afternoon. Precipitation is not expected today or Sunday. Southerly
winds will begin to decrease Sunday morning before increasing once more
Sunday afternoon. Dry conditions will continue with temperatures in the
upper-70s to mid-80s.
.REST OF TODAY...
Sky/weather.........Sunny (0-10 percent).
CWR.................0 percent.
Max temperature.....Around 79.
Min humidity........22 percent.
Wind (20 ft)........South winds 6 to 13 mph.
Mixing height.......4200 ft AGL.
Transport winds.....South 7 to 16 mph increasing to 17 to 20 mph in
the afternoon.
Smoke dispersal.....Poor (3900 knot-ft) early in the morning
increasing to good (71300 knot-ft) in the
afternoon.
TIME (MDT) 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........3 3 3 3 2 3 3 7 6 5
Weather cov.....
Weather type....
Tstm cov........
CWR.............0 0 0 0 0 0 0 0 0 0
Temp............48 55 65 69 73 76 77 77 78 76
RH..............74 59 40 32 26 22 22 22 22 25
20 FT wind dir..S S S S S S S S S S
20 FT wind spd..6 7 9 12 12 13 13 13 13 13
20 FT wind gust.10 13 16 20 22 23 23 23 23 23
Mix hgt (kft)...0.7 1.4 2.1 2.5 3.3 3.6 3.9 4.0 4.2 3.9
Transp wind dir.SE S S S S S S S S S
Transp wind spd.7 10 14 16 17 18 18 18 20 20
SDspl kt-ft/10004 13 25 35 49 58 63 64 71 66
.TONIGHT...
Sky/weather.........Clear (0-10 percent).
CWR.................0 percent.
Min temperature.....Around 50.
Max humidity........93 percent.
Wind (20 ft)........South winds 9 to 13 mph.
Mixing height.......800 ft AGL.
Transport winds.....South 17 to 21 mph.
Smoke dispersal.....Poor (13400 knot-ft).
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........4 3 5 4 6 4 4 3 6 4 6 6
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 53 52 51 51
RH..............29 35 46 51 53 59 61 66 71 74 80 83
20 FT wind dir..S S S S S S S S S S S S
20 FT wind spd..13 13 13 13 13 12 12 12 12 10 10 9
20 FT wind gust.23 23 23 23 22 22 21 20 20 18 17 16
Mix hgt (kft)...2.2 1.2 1.1 1.0 0.9 0.9 0.8 0.9 0.9 0.8 0.8 0.8
Transp wind dir.S S S S S S S S S S S S
Transp wind spd.18 17 18 20 21 20 20 21 20 20 20 20
SDspl kt-ft/100036 19 18 18 17 16 14 16 15 14 13 14
.SUNDAY...
Sky/weather.........Sunny (20-30 percent) then becoming partly
sunny (45-55 percent).
CWR.................0 percent.
Max temperature.....Around 85.
Min humidity........24 percent.
Wind (20 ft)........South winds 9 to 14 mph.
Mixing height.......7600 ft AGL.
Transport winds.....South 15 to 20 mph.
Smoke dispersal.....Poor (13400 knot-ft) early in the morning
increasing to very good (107100 knot-ft) in the
afternoon.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........14 10 10 7 6 7 10 17 25 34 43 51
Weather cov.....
Weather type....
Tstm cov........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
Temp............53 51 56 63 73 78 82 83 84 85 83 82
RH..............80 93 83 67 46 36 29 27 25 24 25 26
20 FT wind dir..S S S S S S S S S S S S
20 FT wind spd..9 9 10 12 12 13 14 13 13 12 12 10
20 FT wind gust.16 17 18 20 22 23 24 23 22 20 18 17
Mix hgt (kft)...0.8 0.8 0.9 1.0 1.6 2.7 4.0 5.7 7.1 7.6 6.1 3.8
Transp wind dir.S S S S S S S S S S S S
Transp wind spd.20 20 17 17 20 20 18 17 17 16 16 15
SDspl kt-ft/100014 14 13 15 27 45 64 85 107 107 86 49
$$
Forecaster...Mose
Requested by...Kenn Perreault
Type of request...PRESCRIBED
.TAG 2522585.2/CYS
.DELDT 09/27/25
.FormatterVersion 2.0.0
.EMAIL ian_muirhead@nps.gov,kenn_perreault@nps.gov