519
FNUS75 KCYS 182240
FWSCYS

Spot Forecast for 775 Rd/Roberts Tract Hand Piles...US Forest Service
National Weather Service Cheyenne WY
340 PM MST Tue Feb 18 2025

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

.DISCUSSION...
Wednesday should see the region begin clearing out thanks to a
system sweeping this arctic airmass out of the area. That being
said, this cold will take several days to move out, so look for
sub-freezing temperatures to remain through the forecast with
partly to mostly sunny skies, while smoke dispersal will be poor
due to light winds and a surface inversion that should lift during
the day, but will re-establish overnight into Thursday morning.

.WEDNESDAY...

Sky/weather.........Mostly sunny (25-35 percent).
CWR.................1 percent.
Max temperature.....Around 7 above.
Min humidity........72 percent.
Wind (20 ft)........Light winds becoming southeast 5 to 6 mph.
Mixing height.......2800 ft AGL.
Transport winds.....Southwest 5 to 7 mph shifting to the southeast
                    8 to 10 mph late in the afternoon.
Smoke dispersal.....Poor (1900 knot-ft).

TIME (MST)      7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........35  36  21  26  29  33  33  25  27  30  26
Weather cov.....
Weather type....
Tstm cov........
CWR.............0   0   0   0   0   0   0   0   0   0   0
Temp............-19 -14 -9  -6  -3  2   4   5   7   7   2
RH..............100 100 95  91  91  79  75  79  72  72  87
20 FT wind dir..SW  SW  SW  S   S   S   S   S   SE  SE  SE
20 FT wind spd..2   2   2   2   3   3   3   5   5   5   6
20 FT wind gust.3   5   5   6   7   7   8   8   8   9   9
Mix hgt (kft)...0.5 0.7 1.1 1.7 2.2 2.6 2.8 2.7 2.0 1.2 0.4
Transp wind dir.SW  SW  SW  SW  SW  SW  S   S   S   SE  SE
Transp wind spd.5   5   5   6   6   6   7   7   7   8   10
SDspl kt-ft/10002   3   5   9   11  13  17  16  12  8   4

.WEDNESDAY NIGHT...

Sky/weather.........Partly cloudy (30-40 percent) then becoming
                    mostly cloudy (50-60 percent).
CWR.................3 percent.
Min temperature.....Around 6 below.
Max humidity........95 percent.
Wind (20 ft)........South winds 6 to 12 mph.
Mixing height.......400 ft AGL.
Transport winds.....South 12 to 20 mph increasing to around 23 mph
                    early in the morning.
Smoke dispersal.....Poor (4000 knot-ft).

TIME (MST)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........25  31  31  33  36  40  44  46  49  51  54  59
Weather cov.....
Weather type....
Tstm cov........
CWR.............0   0   0   0   0   0   0   0   0   0   0   0
Temp............-1  -4  -6  -6  -6  -6  -6  -6  -6  -5  -4  -3
RH..............87  91  95  95  95  91  91  91  95  95  91  91
20 FT wind dir..SE  SE  SE  S   S   S   S   S   S   S   S   S
20 FT wind spd..6   7   7   7   8   9   9   10  10  12  12  12
20 FT wind gust.10  12  13  15  16  17  18  18  20  21  22  22
Mix hgt (kft)...0.4 0.4 0.4 0.6 0.8 0.9 0.9 0.9 0.8 0.8 0.7 0.5
Transp wind dir.SE  S   S   S   S   S   S   S   S   S   S   S
Transp wind spd.12  13  14  15  16  17  17  18  18  20  20  23
SDspl kt-ft/10004   4   5   8   11  13  14  14  13  13  13  10

.THURSDAY...

Sky/weather.........Partly sunny (55-65 percent).
CWR.................3 percent.
Max temperature.....Around 20.
Min humidity........74 percent.
Wind (20 ft)........South winds 12 to 16 mph.
Mixing height.......1600 ft AGL.
Transport winds.....South 20 to 28 mph.
Smoke dispersal.....Poor (13900 knot-ft).

TIME (MST)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........62  64  67  66  65  61  58  56  52  51  51  53
Weather cov.....
Weather type....
Tstm cov........
CWR.............0   0   0   0   0   0   0   0   0   0   0   0
Temp............-2  -1  1   4   8   12  15  18  20  20  19  18
RH..............91  91  91  91  87  84  80  77  74  74  77  77
20 FT wind dir..S   S   S   S   S   S   S   S   S   S   S   S
20 FT wind spd..13  14  14  15  15  16  15  15  14  13  12  12
20 FT wind gust.24  25  26  28  29  29  28  28  26  24  23  21
Mix hgt (kft)...0.7 0.8 1.0 1.2 1.3 1.4 1.5 1.6 1.6 1.4 1.1 0.8
Transp wind dir.S   S   S   S   S   S   S   S   S   S   S   S
Transp wind spd.25  26  28  28  28  26  24  23  21  20  20  20
SDspl kt-ft/100015  19  24  28  31  33  33  33  29  23  18  14

$$
Forecaster...Goatley
Requested by...RXB3
Type of request...PRESCRIBED
.TAG 2503210.0/CYS
.DELDT 02/18/25
.FormatterVersion 2.0.0
.EMAIL benjamin.j.jech@usda.gov,chad.mcpeak@usda.gov,peter.benish@usda.gov,dayton.cleveland@usda.gov