Spot Forecast Issued by NWS Cheyenne, WY
000
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