233
FNUS75 KCYS 161957
FWSCYS

Spot Forecast for Root...Casper Dispatch
National Weather Service Cheyenne WY
157 PM MDT Wed Sep 16 2026

If conditions become unrepresentative, contact the National Weather
Service at (307) 772-2227

.DISCUSSION...

There will be a slight chance of showers and storms this afternoon,
however chances decrease heading into the evening hours. Winds will
also weaken overnight with good humidity recovery around 70 percent.
Cooler temperatures are expected for Thursday as rain moves into the
area. Rain is expected to move into the area by noon and continue
through the first half of the afternoon. As a result, minimum relative
humidity will only fall to about 55 percent. Southeast to southwest
winds are expected during the day at about 10 MPH with gusts up to 20
MPH. Precipitation will become less numerous later in the afternoon,
however storm chances will continue through the evening.

.REST OF TODAY...

Sky/weather.........Mostly sunny (45-55 percent). Chance of showers
                    and slight chance of thunderstorms early in the
                    afternoon.
CWR.................16 percent.
Max temperature.....Around 72.
Min humidity........35 percent.
Wind (20 ft)........West winds 7 to 9 mph. Gusty and erratic winds
                    expected near thunderstorms early in the
                    afternoon.
Mixing height.......6100 ft AGL.
Transport winds.....West 16 to 23 mph.
Smoke dispersal.....Good (79500 knot-ft) early in the morning
                    increasing to very good (121200 knot-ft) in the
                    afternoon.

TIME (MDT)      2PM 3PM 4PM 5PM
Sky (%).........60  46  36  35
Weather cov.....CHC
Weather type....RW
Tstm cov........SCH
CWR.............20  20  20  20
Temp............72  72  72  72
RH..............37  35  35  35
20 FT wind dir..W   W   W   W
20 FT wind spd..9   8   8   7
20 FT wind gust.18  16  15  14
Mix hgt (kft)...5.3 6.1 5.9 5.7
Transp wind dir.W   W   W   W
Transp wind spd.23  23  20  16
SDspl kt-ft/1000106 121 100 80

.TONIGHT...

Sky/weather.........Partly cloudy (30-40 percent) then becoming
                    mostly cloudy (65-75 percent).
CWR.................4 percent.
Min temperature.....Around 53.
Max humidity........71 percent.
Wind (20 ft)........West winds 5 to 7 mph shifting to the south
                    around 5 mph late in the evening, then becoming
                    light in the late evening and overnight.
Mixing height.......500 ft AGL.
Transport winds.....West 9 to 13 mph shifting to the southeast 8 to
                    12 mph in the late evening and overnight.
Smoke dispersal.....Fair (51200 knot-ft) early in the evening
                    decreasing to poor (3700 knot-ft) late in the
                    night.

TIME (MDT)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........35  52  54  73  73  69  71  79  84  82  87  86
Weather cov.....
Weather type....
Tstm cov........
CWR.............0   0   0   0   0   0   0   0   0   0   0   0
Temp............70  67  63  58  57  54  53  54  53  53  53  53
RH..............38  43  48  60  59  66  66  61  66  66  66  69
20 FT wind dir..W   W   SW  S   S   SE  E   E   E   SE  SE  SE
20 FT wind spd..7   6   5   5   3   3   3   2   2   3   3   3
20 FT wind gust.12  10  9   8   7   7   6   6   6   6   7   7
Mix hgt (kft)...4.7 1.1 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5
Transp wind dir.W   SW  S   S   SE  S   SE  SE  SE  SE  S   S
Transp wind spd.13  9   9   10  12  9   9   8   9   10  10  10
SDspl kt-ft/100051  9   4   5   6   4   4   4   4   5   5   5

.THURSDAY...

Sky/weather.........Mostly cloudy (80-90 percent). Rain showers
                    likely in the morning, then rain showers and
                    chance of thunderstorms in the afternoon.
CWR.................24 percent increasing to 59 percent in the
                    afternoon.
Max temperature.....Around 65.
Min humidity........54 percent.
Wind (20 ft)........Southeast winds 5 to 8 mph shifting to the
                    southwest 7 to 8 mph late in the afternoon.
                    Gusty and erratic winds expected near
                    thunderstorms in the afternoon.
Mixing height.......2500 ft AGL.
Transport winds.....South 12 to 20 mph.
Smoke dispersal.....Poor (5500 knot-ft) early in the morning
                    increasing to fair (43200 knot-ft) in the
                    afternoon.

TIME (MDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........82  91  78  91  89  95  91  91  92  91  86  82
Weather cov.....CHC CHC CHC LKY LKY LKY DEF DEF DEF LKY LKY LKY
Weather type....RW  RW  RW  RW  RW  RW  RW  RW  RW  RW  RW  RW
Tstm cov........                        SCH SCH SCH CHC CHC CHC
CWR.............20  20  20  20  20  20  60  60  60  60  60  60
Temp............54  53  55  63  65  65  65  65  65  63  65  65
RH..............66  71  69  54  54  56  60  65  65  70  68  65
20 FT wind dir..SE  SE  SE  SE  SE  SE  SE  S   S   S   SW  SW
20 FT wind spd..5   5   6   7   7   7   8   8   8   8   8   7
20 FT wind gust.8   9   10  12  14  15  15  15  15  15  15  14
Mix hgt (kft)...0.6 0.6 0.6 1.6 2.1 2.4 2.4 2.2 2.5 2.5 2.2 2.1
Transp wind dir.S   S   SE  SE  SE  SE  SE  SE  S   S   SW  SW
Transp wind spd.12  12  12  15  17  16  17  17  20  20  18  17
SDspl kt-ft/10006   6   7   21  32  33  36  33  43  42  36  32

$$
Forecaster...Fuller
Requested by...L. Burke
Type of request...WILDFIRE
.TAG 2622021.0/CYS
.DELDT 09/16/26
.FormatterVersion 2.0.0
.EMAIL wycpc@firenet.gov,burke.lee.r@gmail.com