905
FNUS75 KCYS 021017
FWSCYS

Spot Forecast for Rob Roy Hand Pile Rx...USFS
National Weather Service Cheyenne WY
317 AM MST Tue Dec 2 2025

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

.DISCUSSION...

Light snow showers are expected throughout the day. An inch or two of
new snow accumulation will be possible during the day. High temperatures
are expected to be around 25 degrees with gusty west winds leading to
wind chills in the single digits to below zero. Minimum relative humidity
is expected to be around 75 percent. Snow will continue overnight, with
more steady, and heavier precipitation expected. Further snow accumulations
of 1 to 3 inches are expected Tuesday night. Light and variable winds
likely overnight. Snow showers will continue into Wednesday morning with
additional snow accumulations up to an inch possible. A Winter Weather
Advisory is in effect from 5 AM Tuesday until 11 AM Wednesday. Accumulating
snow and blowing snow are expected. Winds will remain calm throughout the
day Wednesday with a high temperatures around 18 degrees expected.

.TODAY...

Sky/weather.........Partly sunny (60-70 percent). Chance of snow in
                    the morning, then snow likely in the afternoon.
CWR.................18 percent increasing to 31 percent late in the
                    afternoon.
Max temperature.....Around 23.
Min humidity........77 percent.
Wind (20 ft)........Breezy. West winds 16 to 25 mph with gusts to
                    around 47 mph decreasing to around 14 mph late
                    in the afternoon.
Mixing height.......1600 ft AGL.
Transport winds.....West 30 to 37 mph decreasing to 22 to 26 mph
                    late in the afternoon.
Smoke dispersal.....Poor (13500 knot-ft) early in the morning
                    increasing to fair (45700 knot-ft) in the
                    afternoon.

TIME (MST)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........63  62  59  52  55  51  63  65  76  82  75  73
Weather cov.....CHC CHC SCH SCH SCH CHC CHC CHC CHC CHC CHC LKY
Weather type....SN  SN  SN  SN  SN  SN  SN  SN  SN  SN  SN  SN
Tstm cov........
CWR.............10  10  10  10  10  20  20  20  20  20  20  30
Temp............13  14  17  18  20  22  23  23  23  22  19  17
RH..............91  96  84  84  81  77  77  81  81  84  92  100
20 FT wind dir..W   W   W   W   W   W   W   W   W   W   W   W
20 FT wind spd..25  25  24  23  22  22  21  21  20  17  16  14
20 FT wind gust.47  46  45  44  43  41  40  39  37  33  30  26
Mix hgt (kft)...0.4 0.7 1.1 1.2 1.3 1.4 1.5 1.5 1.6 1.4 1.0 0.7
Transp wind dir.W   W   W   W   W   W   W   W   W   W   W   W
Transp wind spd.36  35  37  37  37  36  36  35  33  30  26  22
SDspl kt-ft/100014  21  34  38  41  44  46  44  46  36  22  14

.TONIGHT...

Sky/weather.........Mostly cloudy (75-85 percent). Snow likely.
CWR.................31 percent decreasing to 19 percent late in the
                    evening.
Min temperature.....Around 9 above.
Max humidity........100 percent.
Wind (20 ft)........West winds 6 to 13 mph in the evening becoming
                    light.
Mixing height.......300 ft AGL.
Transport winds.....West 14 to 22 mph shifting to the northwest 8
                    to 12 mph overnight, then shifting to the
                    northeast 7 to 10 mph after 3 am.
Smoke dispersal.....Poor (2700 knot-ft).

TIME (MST)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........72  67  61  65  74  80  84  86  90  93  93  94
Weather cov.....LKY LKY LKY LKY LKY LKY LKY LKY LKY LKY LKY LKY
Weather type....SN  SN  SN  SN  SN  SN  SN  SN  SN  SN  SN  SN
Tstm cov........
CWR.............30  30  30  30  30  20  20  20  20  20  20  20
Temp............17  16  16  15  13  13  13  12  12  12  10  10
RH..............96  100 100 100 100 100 100 100 100 100 100 100
20 FT wind dir..W   W   W   W   W   W   W   NW  NW  N   NE  NE
20 FT wind spd..13  12  9   8   7   6   3   2   2   2   2   3
20 FT wind gust.23  21  18  15  13  9   7   5   3   3   6   7
Mix hgt (kft)...0.8 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.4 0.5 0.6 0.4
Transp wind dir.W   W   W   W   W   W   W   NW  NW  N   NE  NE
Transp wind spd.22  21  20  18  16  14  12  9   8   7   7   10
SDspl kt-ft/100015  5   5   5   5   4   3   3   3   3   4   4

.WEDNESDAY...

Sky/weather.........Mostly cloudy (70-80 percent). Snow likely
                    early in the morning, then chance of snow early
                    in the morning. Slight chance of snow late in
                    the afternoon.
CWR.................19 percent decreasing to 3 percent late in the
                    afternoon.
Max temperature.....Around 18.
Min humidity........80 percent.
Wind (20 ft)........Northeast winds 5 to 6 mph in the morning and
                    early afternoon becoming light.
Mixing height.......2300 ft AGL.
Transport winds.....Northeast 6 to 12 mph.
Smoke dispersal.....Poor (1700 knot-ft).

TIME (MST)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........93  92  90  86  84  83  83  83  81  73  64  53
Weather cov.....LKY LKY CHC CHC CHC CHC CHC CHC SCH SCH SCH
Weather type....SN  SN  SN  SN  SN  SN  SN  SN  SN  SN  SN
Tstm cov........
CWR.............20  20  20  20  20  10  10  10  10  10  10  0
Temp............10  9   11  12  16  16  17  18  18  16  12  9
RH..............100 100 100 100 84  84  84  80  80  88  100 100
20 FT wind dir..NE  NE  NE  NE  E   E   E   NE  NE  N   N   NW
20 FT wind spd..5   5   6   6   6   6   6   5   3   3   3   2
20 FT wind gust.8   9   9   10  10  10  9   8   7   7   6   6
Mix hgt (kft)...0.5 0.7 0.8 1.3 1.9 2.2 2.3 2.2 1.9 1.4 0.8 0.3
Transp wind dir.NE  NE  NE  E   NE  N   N   N   N   N   N   N
Transp wind spd.10  12  10  9   9   9   9   9   8   7   7   6
SDspl kt-ft/10005   7   8   11  15  18  19  18  13  8   5   2

$$
Forecaster...Fuller
Requested by...Nicholas Zaczek
Type of request...PRESCRIBED
.TAG 2526818.0/CYS
.DELDT 12/02/25
.FormatterVersion 2.0.0
.EMAIL nicholas.zaczek@usda.gov