Text Products for FWS Issued by CYS

Spot Forecast
Issued by NWS Cheyenne, WY
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FNUS75 KCYS 131143
FWSCYS

Spot Forecast for Collins Rx...USDA Forest Service
National Weather Service Cheyenne WY
543 AM MDT Sat Apr 13 2024

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

.DISCUSSION...

Warm temperatures and dry conditions expected again today. Expect
elevated fire weather conditions this afternoon with WNW winds
gusting 20 to 25 MPH at times, and minimum RH between 15 and 20
percent. A few virga showers will develop this afternoon. Most of
these will stay away from the burn area, but can`t rule out one
approaching close enough to bring brief gusty/erratic winds.

Light and possibly variable winds tonight will become southerly
Sunday morning. Another warm and dry day is expected, with gusts
to around 20 MPH, and minimum RH around 20 percent. The next chance
for precipitation will be late Monday into early Tuesday.

.TODAY...

Sky/weather.........Sunny (20-30 percent).
CWR.................2 percent.
LAL.................1.
Max temperature.....80 to 82 degrees.
Min humidity........16 to 18 percent.
Wind (20 ft)........Southwest winds 5 to 10 mph shifting to the west
                    10 to 15 mph in the late morning and afternoon.
Mixing height.......10400 ft AGL increasing to 14900 ft AGL late in
                    the afternoon.
Transport winds.....Southwest 16 to 20 mph shifting to the
                    northwest 14 to 21 mph in the late morning and
                    afternoon.
Smoke dispersal.....Poor (9800 knot-ft) early in the morning
                    increasing to good (90000 knot-ft) in the
                    afternoon increasing to very good (145300
                    knot-ft) early in the morning increasing to
                    excellent (193900 knot-ft) in the afternoon
                    late in the afternoon.
Haines Index........5 or moderate potential for large plume
                    dominated fire growth.

TIME (MDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........37  41  27  25  19  19  18  13  11  9   10  12
Weather cov.....
Weather type....
Tstm cov........
CWR.............0   0   0   0   0   0   0   0   0   0   0   0
LAL.............1   1   1   1   1   1   1   1   1   1   1   1
Temp............48  53  58  62  67  71  76  77  79  80  79  78
RH..............49  44  40  38  33  29  23  21  18  17  18  19
20 FT wind dir..SW  SW  W   W   W   W   W   W   NW  NW  NW  NW
20 FT wind spd..8   7   7   8   9   12  12  13  13  12  12  12
20 FT wind gust.15  14  14  15  17  20  23  23  23  22  21  20
Mix hgt (kft)...0.7 0.7 0.8 1.0 1.1 1.6 3.0 6.4 10  14  15  15
Transp wind dir.SW  SW  W   W   W   NW  NW  NW  NW  W   W   NW
Transp wind spd.16  17  20  21  21  18  17  16  16  15  15  14
Haines index....5   5   5   5   5   5   5   5   5   5   5   5
SDspl kt-ft/100010  10  13  18  20  26  46  90  145 175 194 179

.TONIGHT...

Sky/weather.........Mostly clear (10-20 percent).
CWR.................2 percent.
LAL.................1.
Min temperature.....43 to 45 degrees.
Max humidity........68 to 73 percent.
Wind (20 ft)........Northwest winds 5 to 10 mph in the evening
                    becoming light.
Mixing height.......4600 ft AGL decreasing to 0 ft AGL in the late
                    evening and overnight.
Transport winds.....Northwest 13 to 15 mph shifting to the
                    southeast around 6 mph early in the morning.
Smoke dispersal..... very good (146100 knot-ft) early in the
                    evening decreasing to good (60300 knot-ft) late
                    in the night decreasing to poor (0 knot-ft) in
                    the late evening and overnight.
Haines Index........5 or moderate potential for large plume
                    dominated fire growth.

TIME (MDT)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........13  20  13  13  7   6   6   6   6   5   5   6
Weather cov.....
Weather type....
Tstm cov........
CWR.............0   0   0   0   0   0   0   0   0   0   0   0
LAL.............1   1   1   1   1   1   1   1   1   1   1   1
Temp............77  72  66  61  59  57  55  53  51  49  48  47
RH..............21  25  32  39  42  45  51  54  59  63  65  68
20 FT wind dir..NW  W   W   W   W   NW  N   N   NW  W   W   S
20 FT wind spd..10  9   7   7   6   6   5   3   3   3   3   3
20 FT wind gust.17  16  14  13  10  9   8   7   7   7   7   7
Mix hgt (kft)...13  9.4 4.6 0.8 0.1 0.3 1.1 1.0 0.9 0.8 0.6 0.5
Transp wind dir.NW  NW  N   N   N   NE  NE  NE  NE  NE  E   SE
Transp wind spd.13  15  15  16  15  13  10  8   7   6   5   6
Haines index....5   5   5   5   5   5   5   5   5   5   5   5
SDspl kt-ft/1000146 122 60  12  0   4   10  7   5   4   3   3

.SUNDAY...

Sky/weather.........Sunny (5-15 percent).
CWR.................0 percent.
LAL.................1.
Max temperature.....80 to 82 degrees.
Min humidity........20 to 22 percent.
Wind (20 ft)........South winds 5 to 10 mph.
Mixing height.......7400 ft AGL increasing to 13200 ft AGL in the
                    afternoon.
Transport winds.....South 7 to 16 mph.
Smoke dispersal.....Poor (2000 knot-ft) early in the morning
                    increasing to good (88900 knot-ft) in the
                    afternoon increasing to very good (123700
                    knot-ft) early in the morning increasing to
                    excellent (184600 knot-ft) in the afternoon in
                    the afternoon.
Haines Index........4 or low potential for large plume dominated
                    fire growth.

TIME (MDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........5   8   6   6   6   6   11  11  9   7   11  16
Weather cov.....
Weather type....
Tstm cov........
CWR.............0   0   0   0   0   0   0   0   0   0   0   0
LAL.............1   1   1   1   1   1   1   1   1   1   1   1
Temp............46  50  55  60  65  69  74  76  78  80  80  79
RH..............71  63  57  51  43  37  32  27  25  21  21  22
20 FT wind dir..SE  SE  SE  SE  SE  S   S   S   S   S   S   S
20 FT wind spd..5   6   6   7   7   8   9   9   9   9   9   9
20 FT wind gust.8   9   10  13  14  15  16  16  17  17  17  17
Mix hgt (kft)...0.5 0.2 0.3 1.3 4.0 7.4 10  12  12  12  13  13
Transp wind dir.SE  SE  SE  SE  S   S   S   S   SW  SW  SW  S
Transp wind spd.7   9   13  15  15  14  14  14  14  14  15  16
Haines index....4   4   4   4   4   4   4   4   4   4   4   4
SDspl kt-ft/10003   2   4   17  52  89  124 140 147 148 170 185

$$
Forecaster...Natoli
Requested by...Ben Jech
Type of request...PRESCRIBED
.TAG 2410581.0/CYS
.DELDT 04/13/24
.FormatterVersion 2.0.0
.EMAIL benjamin.j.jech@usda.gov
National Weather Service Weather Forecast Office
