217
FNUS75 KCYS 201217
FWSCYS

Spot Forecast for F.E. Warren...USFWS
National Weather Service Cheyenne WY
517 AM MST Thu Nov 20 2025

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

.DISCUSSION...
Weather concerns remain minimal this morning into the early afternoon
hours. Precipitation chances begin to pick up by 2pm as isolated rain
showers move into the area. Rain will transition to snow after sunset
with around an inch of snow possible overnight. Snow continues into
the morning hours before switching back to a rain/snow mix by late
Friday morning. Afternoon relative humidity values today will remain
above 40% with relative humidity increasing to 85 to 90% for Friday
afternoon. Mostly light winds today out of the south and switching to
the southeast by 10am this morning. Gusts up to around 15mph expected
this afternoon. Winds remain calm on Friday, with gusts up to 12mph.

.TODAY...

Sky/weather.........Partly sunny (55-65 percent) then becoming
                    cloudy (85-95 percent). Slight chance of rain
                    showers late in the afternoon.
CWR.................5 percent increasing to 27 percent late in the
                    afternoon.
Max temperature.....Around 51.
Min humidity........42 percent.
Wind (20 ft)........South winds 5 to 10 mph shifting to the
                    southeast 7 to 10 mph in the afternoon.
Mixing height.......2900 ft AGL.
Transport winds.....Southeast 9 to 16 mph.
Smoke dispersal.....Poor (3600 knot-ft) early in the morning
                    increasing to fair (40800 knot-ft) in the
                    afternoon.

TIME (MST)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........60  45  41  43  42  40  48  54  64  76  81  88
Weather cov.....                                SCH SCH SCH CHC
Weather type....                                RW  RW  RW  RN
Tstm cov........
CWR.............0   0   0   0   0   10  10  10  10  10  10  30
Temp............33  35  38  43  46  49  50  50  50  49  48  45
RH..............78  72  67  55  47  42  42  42  42  46  47  55
20 FT wind dir..SW  SW  SW  S   S   S   SE  SE  SE  SE  SE  SE
20 FT wind spd..6   5   5   7   8   9   10  10  10  9   8   7
20 FT wind gust.9   8   8   12  14  17  17  17  17  16  14  13
Mix hgt (kft)...0.6 0.6 0.4 1.0 1.6 2.3 2.6 2.9 2.6 2.7 2.3 1.5
Transp wind dir.SE  E   SE  SE  S   S   S   S   SE  SE  E   E
Transp wind spd.9   10  9   13  16  16  16  16  15  14  15  13
SDspl kt-ft/10005   5   4   12  22  32  37  41  34  32  30  17

.TONIGHT...

Sky/weather.........Cloudy (90-100 percent). Slight chance of snow
                    in the evening. Snow likely overnight. Patchy
                    fog overnight.
CWR.................27 percent increasing to 65 percent late in the
                    evening.
Min temperature.....Around 31.
Max humidity........100 percent.
Wind (20 ft)........Southeast winds 5 to 7 mph early in the evening
                    becoming light, then becoming north 5 to 6 mph
                    after 3 am.
Mixing height.......900 ft AGL.
Transport winds.....East 8 to 13 mph shifting to the northeast 9 to
                    15 mph overnight.
Smoke dispersal.....Poor (7100 knot-ft).

TIME (MST)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........89  91  93  94  93  94  96  97  96  96  96  97
Weather cov.....CHC CHC LKY LKY LKY LKY LKY LKY LKY LKY LKY LKY
Weather type....RN  RN  RN  RN  RN  RN  RN  RS  RS  RS  RS  RS
Tstm cov........
CWR.............30  30  30  30  30  70  70  70  70  70  70  60
Temp............41  40  39  38  36  35  35  35  34  35  34  34
RH..............67  76  82  89  96  100 96  89  89  89  96  100
20 FT wind dir..SE  SE  SE  SE  E   E   E   N   N   N   N   N
20 FT wind spd..7   6   6   5   3   3   2   3   3   5   5   6
20 FT wind gust.12  10  9   8   7   6   6   6   7   8   9   9
Mix hgt (kft)...1.2 1.1 1.2 1.1 0.9 1.1 1.4 1.4 1.2 1.4 1.5 1.4
Transp wind dir.E   E   E   E   E   E   NE  NE  NE  NE  NE  N
Transp wind spd.13  13  13  12  9   10  8   9   10  10  14  15
SDspl kt-ft/100013  12  14  11  7   10  10  12  11  13  18  19

.FRIDAY...

Sky/weather.........Cloudy (85-95 percent). Patchy fog early in the
                    morning. Chance of snow late in the morning.
Chance of rain late in the morning.
CWR.................56 percent decreasing to 4 percent.
Max temperature.....Around 41.
Min humidity........85 percent.
Wind (20 ft)........North winds 5 to 6 mph shifting to the
                    southwest around 5 mph late in the afternoon.
Mixing height.......1600 ft AGL.
Transport winds.....Northeast 8 to 13 mph shifting to the northwest
                    around 7 mph late in the afternoon, then
                    shifting to the southwest around 6 mph late in
                    the afternoon.
Smoke dispersal.....Poor (2800 knot-ft).

TIME (MST)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........97  97  96  93  94  94  93  92  90  87  84  81
Weather cov.....LKY LKY LKY LKY LKY CHC CHC CHC CHC CHC CHC
Weather type....RS  RS  RS  RS  RS  RS  RN  RN  RN  RN  RN
Tstm cov........
CWR.............60  60  60  60  60  20  20  20  20  20  20  0
Temp............33  31  34  36  37  37  38  39  40  39  38  37
RH..............100 100 100 96  96  96  92  89  85  89  92  92
20 FT wind dir..N   N   N   N   N   N   N   W   W   W   SW  SW
20 FT wind spd..6   6   6   6   5   5   5   6   6   5   5   5
20 FT wind gust.9   9   9   9   9   8   9   9   9   8   8   8
Mix hgt (kft)...1.4 0.9 0.9 0.9 1.0 1.2 1.4 1.6 1.6 1.3 0.9 0.6
Transp wind dir.NE  NE  NE  NE  NE  NE  NE  N   N   NW  SW  S
Transp wind spd.13  9   9   9   9   9   9   8   8   7   6   6
SDspl kt-ft/100015  8   7   8   8   9   11  11  11  8   5   3

$$
Forecaster...Mose
Requested by...Michael miller
Type of request...PRESCRIBED
.TAG 2526046.5/CYS
.DELDT 11/20/25
.FormatterVersion 2.0.0
.EMAIL michael_a_miller@fws.gov