179
FNUS75 KCYS 071525
FWSCYS

Spot Forecast for Wildcat RX...USDA Forest Service
National Weather Service Cheyenne WY
825 AM MST Tue Jan 7 2025

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

.DISCUSSION...

Cold and dry weather will continue through the day on Tuesday. Expect poor
smoke dispersal with low cloud ceilings and a strong inversion in place.
Cold and moist low-level air will keep RH values high through the forecast
period. Winds will shift to northwest on Wednesday however smoke dispersal
will remain poor with inversions remaining in place for most of the day.

.WEDNESDAY...

Sky/weather.........Mostly sunny (30-40 percent).
CWR.................4 percent.
LAL.................1.
Max temperature.....Around 32.
Min humidity........46 percent.
Wind (20 ft)........West winds 14 to 15 mph, with gusts up to 35 to 40 mph
                    possible.
Mixing height.......500 ft AGL.
Transport winds.....West 18 to 25 mph.
Smoke dispersal.....Poor (3700 knot-ft).
Haines Index........3 to 4 or very low to low potential for large
                    plume dominated fire growth.

TIME (MST)      9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........9   12  13  16  20  23  35  46  58
Weather cov.....
Weather type....
Tstm cov........
CWR.............0   0   0   0   0   0   0   0   0
LAL.............1   1   1   1   1   1   1   1   1
Temp............17  21  26  27  29  30  28  26  24
RH..............53  52  48  49  49  46  50  54  57
20 FT wind dir..W   W   W   W   W   W   W   W   W
20 FT wind spd..15  15  15  15  14  14  14  14  14
20 FT wind gust.24  23  22  22  21  21  20  20  18
Mix hgt (kft)...0.2 0.3 0.3 0.4 0.5 0.5 0.5 0.4 0.3
Transp wind dir.W   W   W   W   W   W   W   W   W
Transp wind spd.18  20  21  23  24  25  25  24  23
Haines index....4   4   4   4   4   4   4   4   3
SDspl kt-ft/10004   5   6   9   11  12  11  9   7

.WEDNESDAY NIGHT...

Sky/weather.........Mostly cloudy (75-85 percent). Snow likely late
                    in the evening. Chance of snow early in the
                    morning.
CWR.................4 percent increasing to 27 percent late in the
                    evening, then decreasing to 7 percent early in
                    the morning.
LAL.................1.
Min temperature.....Around 20.
Max humidity........84 percent.
Wind (20 ft)........West winds 13 to 18 mph shifting to the
                    northwest 21 to 24 mph with gusts to around 44
                    mph after 3 am.
Mixing height.......300 ft AGL.
Transport winds.....Northwest 20 to 23 mph increasing to 26 to 35
                    mph overnight.
Smoke dispersal.....Poor (5700 knot-ft).
Haines Index........2 to 3 or very low potential for large plume
                    dominated fire growth.

TIME (MST)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........65  73  80  84  89  93  92  90  89  88  86  85
Weather cov.....                    LKY LKY LKY LKY LKY LKY CHC
Weather type....                    SN  SN  SN  SN  SN  SN  SN
Tstm cov........
CWR.............0   0   0   0   0   30  30  30  30  30  30  10
LAL.............1   1   1   1   1   1   1   1   1   1   1   1
Temp............23  21  20  21  22  23  24  24  25  25  25  25
RH..............58  59  62  62  63  65  67  68  68  70  71  71
20 FT wind dir..W   W   W   W   W   NW  NW  NW  NW  NW  NW  NW
20 FT wind spd..14  13  13  13  13  14  15  16  18  21  22  24
20 FT wind gust.17  17  17  17  17  18  21  28  33  38  41  44
Mix hgt (kft)...0.3 0.3 0.3 0.3 0.4 0.4 0.4 0.4 0.4 0.5 0.6 0.7
Transp wind dir.W   W   W   W   NW  NW  NW  NW  NW  NW  NW  NW
Transp wind spd.22  21  20  20  20  21  23  26  30  32  33  35
Haines index....3   3   3   3   3   2   2   2   2   2   2   2
SDspl kt-ft/10006   6   6   6   6   7   7   9   11  13  16  21

.THURSDAY...

Sky/weather.........Mostly cloudy (65-75 percent) then becoming
                    mostly sunny (30-40 percent). Chance of snow in
                    the morning.
CWR.................7 percent.
LAL.................1.
Max temperature.....Around 24.
Min humidity........67 percent.
Wind (20 ft)........Breezy. Northwest winds 16 to 25 mph with gusts
                    to around 46 mph decreasing to 12 to 15 mph
                    with gusts to around 32 mph late in the
                    afternoon.
Mixing height.......3000 ft AGL.
Transport winds.....Northwest 31 to 39 mph decreasing to 22 to 26
                    mph late in the afternoon.
Smoke dispersal.....Poor (8400 knot-ft) early in the morning
                    increasing to very good (101300 knot-ft) in the
                    afternoon.
Haines Index........2 to 3 or very low potential for large plume
                    dominated fire growth.

TIME (MST)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........86  88  89  80  72  63  54  45  36  34  31  29
Weather cov.....CHC CHC CHC CHC CHC
Weather type....SN  SN  SN  SN  SN
Tstm cov........
CWR.............10  10  10  10  10  0   0   0   0   0   0   0
LAL.............1   1   1   1   1   1   1   1   1   1   1   1
Temp............24  22  21  21  22  22  22  23  23  22  21  20
RH..............76  80  84  82  80  77  75  73  71  72  73  74
20 FT wind dir..NW  NW  NW  NW  NW  NW  NW  NW  NW  NW  NW  NW
20 FT wind spd..25  25  24  23  22  21  20  18  16  15  13  12
20 FT wind gust.46  46  46  45  43  40  38  37  35  32  30  28
Mix hgt (kft)...0.9 1.2 1.5 1.9 2.2 2.5 2.8 3.0 2.8 2.1 1.2 0.4
Transp wind dir.NW  NW  NW  NW  N   N   N   NW  NW  NW  NW  NW
Transp wind spd.33  32  31  33  36  38  39  39  37  32  26  22
Haines index....2   2   2   2   2   3   3   3   3   3   3   2
SDspl kt-ft/100027  34  41  54  69  83  96  101 91  60  28  8

$$

Requested by...Blake Cobb
Type of request...PRESCRIBED
.TAG 2500173.0/CYS
.DELDT 01/07/25
.FormatterVersion 2.0.0
.EMAIL blake.cobb@usda.gov