Spot Forecast
Issued by NWS Cheyenne, WY
Issued by NWS Cheyenne, WY
397
FNUS75 KCYS 042242
FWSCYS
Spot Forecast for Sourdoughs/Rye handpile RX...USfS
National Weather Service Cheyenne WY
342 PM MST Wed Dec 4 2024
If conditions become unrepresentative, contact the National Weather
Service at (307) 772-2227
.DISCUSSION...
Similar conditions are expected during the day Thursday compared to
Wednesday. A stagnant upper-level pattern across the United States will
continue the northwest flow regime over the area. Expect another day
of fairly light winds at the surface, with north to northwest winds
likely above the surface. Cannot rule out a few wind shifts throughout
the day. High temperatures will be around 40 degrees with minimum relative
humidity around 40 percent due to snow cover. Expect much of the same
conditions on Friday, from high temperature, minimum relative humidity
and wind. Light and variable winds are likely at the surface with west to
northwest winds aloft. Similar conditions are also forecast for Saturday.
A bit of pattern change is expected Sunday as a shortwave skirts the
forecast area. Snow will be possible Sunday night, with much colder
temperatures expected for the beginning of next week. Stronger winds will
also be possible ahead of and behind the cold front.
.THURSDAY...
Sky/weather.........Sunny (15-25 percent).
CWR.................0 percent.
LAL.................1.
Max temperature.....Around 40.
Min humidity........37 percent.
Wind (20 ft)........South winds 5 to 6 mph shifting to the west
late in the morning, then becoming light late
in the afternoon.
Mixing height.......3200 ft AGL.
Transport winds.....Southwest 8 to 16 mph shifting to the west 14
to 17 mph in the afternoon.
Smoke dispersal.....Poor (6600 knot-ft) early in the morning
increasing to fair (47900 knot-ft) in the
afternoon.
Haines Index........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 (%).........25 26 24 24 24 24 21 17 14 14 13 13
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............23 23 25 30 34 37 39 39 38 37 34 31
RH..............59 59 57 49 41 38 37 39 40 42 47 53
20 FT wind dir..S S S S SW W W W W W W W
20 FT wind spd..6 5 5 5 5 5 5 6 6 5 3 3
20 FT wind gust.9 9 9 8 8 8 8 9 10 8 7 7
Mix hgt (kft)...0.9 0.9 1.0 1.4 1.9 2.5 2.9 3.2 3.2 2.9 2.4 1.9
Transp wind dir.SW SW SW SW W W W W W W W W
Transp wind spd.8 9 9 12 13 15 16 17 17 16 15 14
Haines index....3 3 3 3 3 3 3 3 3 3 3 3
SDspl kt-ft/10007 7 8 14 21 32 40 47 48 41 31 23
.THURSDAY NIGHT...
Sky/weather.........Mostly clear (5-15 percent).
CWR.................0 percent.
LAL.................1.
Min temperature.....Around 17.
Max humidity........62 percent.
Wind (20 ft)........Light winds becoming south around 5 mph early
in the evening, then becoming light overnight.
Mixing height.......700 ft AGL.
Transport winds.....Southwest 7 to 12 mph shifting to the southeast
around 5 mph early in the morning.
Smoke dispersal.....Poor (2800 knot-ft).
Haines Index........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 (%).........11 8 7 6 6 7 8 10 12 12 12 10
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............29 27 25 24 24 23 22 22 22 20 19 21
RH..............55 57 62 62 60 62 59 59 59 59 62 56
20 FT wind dir..W SW S S S S S S S S S SE
20 FT wind spd..3 3 5 5 5 5 5 5 3 3 3 3
20 FT wind gust.6 6 8 9 8 8 8 8 7 7 7 7
Mix hgt (kft)...1.5 1.3 1.1 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 0.7
Transp wind dir.W SW SW SW SW SW SW SW SW SW SW SE
Transp wind spd.12 10 9 9 9 9 9 8 8 8 7 5
Haines index....3 3 3 3 3 3 3 3 3 3 3 3
SDspl kt-ft/100016 12 9 8 8 8 8 7 7 7 6 3
.FRIDAY...
Sky/weather.........Sunny (5-15 percent).
CWR.................0 percent.
LAL.................1.
Max temperature.....Around 39.
Min humidity........37 percent.
Wind (20 ft)........Light winds early in the morning becoming south
around 5 mph, then shifting to the west 5 to 6
mph early in the afternoon becoming light.
Mixing height.......2000 ft AGL.
Transport winds.....South 5 to 6 mph shifting to the southwest 7 to
9 mph in the late morning and afternoon.
Smoke dispersal.....Poor (2400 knot-ft).
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 (%).........10 9 9 9 9 9 9 9 9 11 14 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............21 22 22 27 31 35 37 38 38 36 33 31
RH..............54 54 54 46 45 40 38 37 38 42 44 54
20 FT wind dir..SE S S S S SW SW W W W W SW
20 FT wind spd..3 5 5 5 5 5 5 5 6 5 3 2
20 FT wind gust.7 8 8 8 9 9 9 9 9 8 7 3
Mix hgt (kft)...0.6 0.6 0.7 0.9 1.3 1.7 1.9 2.0 1.9 1.5 1.0 0.7
Transp wind dir.SE S S S SW SW W W W W SW S
Transp wind spd.5 6 6 6 7 7 8 9 9 9 8 7
Haines index....3 3 3 3 3 3 3 3 3 3 3 2
SDspl kt-ft/10002 3 3 5 8 10 13 16 15 12 7 4
.FORECAST DAYS 3 THROUGH 7...
.SATURDAY...
Mostly clear. Lows around 15. Highs in the upper 30s. South winds
around 5 mph.
.SUNDAY...
Partly cloudy. Chance of snow showers. Lows in the lower 20s.
Highs in the lower 30s. Southwest winds around 11 mph.
.MONDAY...
Colder. Mostly cloudy with chance of snow showers. Lows around
11. Highs around 19. West winds around 8 mph.
.TUESDAY...
Partly cloudy. Slight chance of snow showers. Lows around 5.
Highs around 19.
.WEDNESDAY...
Partly cloudy. Lows around 8. Highs in the upper 20s.
$$
Forecaster...Fuller
Requested by...Coyde Fickel
Type of request...PRESCRIBED
.TAG 2427492.0/CYS
.DELDT 12/04/24
.FormatterVersion 2.0.0
.EMAIL coyde.fickel@gmail.com