Spot Forecast
Issued by NWS Cheyenne, WY
Issued by NWS Cheyenne, WY
357
FNUS75 KCYS 151257
FWSCYS
Spot Forecast for Fire Academy...NEMA
National Weather Service Cheyenne WY
657 AM MDT Mon Sep 15 2025
If conditions become unrepresentative, contact the National Weather
Service at (307) 772-2227
.DISCUSSION...
Drier weather expected today with daytime humidities lowering to around
20 percent this afternoon. Moisture will increase late in the day,
resulting in a few showers and thunderstorms late in the afternoon
and this evening, mainly after 400 PM. Another Pacific storm system
will move into the area Tuesday and Wednesday, bringing numerous
rain showers and scattered thunderstorms to western Nebraska through
Thursday morning. Much cooler temperatures are expected for midweek
with improving daytime humidities.
.REST OF TODAY...
Sky/weather.........Mostly sunny (20-30 percent) early, becoming partly
sunny late in the afternoon. Slight chance of
showers and thunderstorms late in the afternoon.
CWR.................5 percent.
Max temperature.....82 to 87 degrees.
Min humidity........19 to 24 percent.
Wind (20 ft)........Southwest winds 10 mph shifting to the
south around 10 to 15 mph late in the afternoon.
Mixing height.......10300 ft AGL increasing to 11400 ft AGL late in
the afternoon.
Transport winds.....West 10 to 16 mph.
Smoke dispersal.....Poor (5500 knot-ft) early in the morning
increasing to fair (50100 knot-ft) in the
afternoon increasing to fair (52400 knot-ft)
early in the morning increasing to very good
(144700 knot-ft) in the afternoon in the
afternoon.
TIME (MDT) 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........12 12 3 3 3 15 15 15 48 48 48
Weather cov..... SCH SCH SCH
Weather type.... RW RW RW
Tstm cov........
CWR.............0 0 0 0 0 10 10 10 10 10 10
Temp............53 57 63 72 77 82 83 84 85 82 81
RH..............66 59 50 37 31 25 24 23 22 26 28
20 FT wind dir..SW SW SW W W W SW SW SW S S
20 FT wind spd..10 10 10 10 10 10 10 9 9 8 7
20 FT wind gust.21 21 21 20 20 20 20 18 18 16 15
Mix hgt (kft)...0.5 0.5 0.8 1.8 3.9 9.3 10 11 11 11 5.8
Transp wind dir.W W W W W W W W W SW W
Transp wind spd.14 13 14 15 15 16 16 14 12 10 10
SDspl kt-ft/10006 6 9 24 50 130 145 136 113 95 52
.TONIGHT...
Sky/weather.........Mostly cloudy. Slight chance of
thunderstorms early in the evening. Slight
chance of rain showers in the evening.
CWR.................5 percent.
Min temperature.....Around 52.
Max humidity........90 percent.
Wind (20 ft)........South winds 5 to 10 mph shifting to the
northwest around 5 mph early in the morning.
Gusty and erratic winds expected near
thunderstorms early in the evening.
Mixing height.......400 ft AGL.
Transport winds.....Southeast 8 to 12 mph shifting to the north 10
to 12 mph early in the evening, then shifting
to the southeast 8 to 12 mph late in the
evening shifting to the west around 8 mph
overnight shifting to the north shifting to the
northwest 8 to 9 mph after 3 am.
Smoke dispersal.....Poor (2700 knot-ft).
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........65 65 65 64 64 64 36 36 36 52 52 52
Weather cov.....SCH SCH SCH SCH SCH SCH
Weather type....RW RW RW RW RW RW
Tstm cov........SCH SCH SCH
CWR.............10 10 10 10 10 10 0 0 0 0 0 0
Temp............78 71 67 65 62 61 60 58 57 56 55 54
RH..............34 44 52 56 62 65 64 69 69 72 74 77
20 FT wind dir..S S S S SW SW SW SW W W W NW
20 FT wind spd..7 7 6 6 5 5 5 5 5 5 6 6
20 FT wind gust.13 12 10 10 9 9 9 9 9 9 10 12
Mix hgt (kft)...0.5 0.4 0.5 0.5 0.5 0.4 0.4 0.4 0.4 0.4 0.4 0.4
Transp wind dir.SE E N NE SE E W NE N NW NW N
Transp wind spd.8 12 10 12 12 8 8 8 8 9 8 9
SDspl kt-ft/10004 4 4 5 5 3 3 3 3 3 3 3
.TUESDAY...
Sky/weather.........Partly sunny (55-65 percent). Slight chance of
rain showers and thunderstorms late in the
afternoon.
CWR.................5 percent.
Max temperature.....Around 75.
Min humidity........40 to 55 percent.
Wind (20 ft)........Northwest winds 5 to 8 mph shifting to the
northeast around 10 to 15 mph in the afternoon.
Gusty and erratic winds expected near thunderstorms
late in the afternoon.
Mixing height.......4400 ft AGL.
Transport winds.....North 9 to 14 mph.
Smoke dispersal.....Poor (2500 knot-ft) early in the morning
increasing to fair (41900 knot-ft) in the
afternoon.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........61 61 61 52 52 52 63 63 63 55 55 55
Weather cov.....SCH SCH SCH SCH SCH SCH CHC CHC CHC CHC CHC CHC
Weather type....RW RW RW RW RW RW RW RW RW RW RW RW
Tstm cov........ SCH SCH SCH
CWR.............10 10 10 10 10 10 10 10 10 10 10 10
Temp............54 52 54 58 63 66 70 71 73 74 73 72
RH..............80 89 90 83 70 63 57 55 51 50 51 53
20 FT wind dir..NW NW NW NW NW N N N NE NE NE NE
20 FT wind spd..5 6 7 7 8 8 8 8 8 8 8 8
20 FT wind gust.12 13 14 15 16 17 17 17 17 16 16 16
Mix hgt (kft)...0.3 0.3 0.4 0.6 1.3 2.0 2.7 3.5 4.1 4.4 4.0 3.3
Transp wind dir.N N N N N N N N NE NE NE NE
Transp wind spd.10 9 13 12 10 12 14 14 12 10 10 10
SDspl kt-ft/10003 3 5 6 12 20 32 42 42 40 36 29
$$
Requested by...Megan Eckles
Type of request...PRESCRIBED
.TAG 2521976.0/CYS
.DELDT 09/15/25
.FormatterVersion 2.0.0
.EMAIL megan.eckles@nebraska.gov