275
FNUS75 KCYS 212306
FWSCYS
SPOT FORECAST FOR BUCK/OBSIDIAN RX...USFS
NATIONAL WEATHER SERVICE CHEYENNE WY
406 PM MST WED JAN 21 2026
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE AT (307) 772-2227
DISCUSSION
THE MAIN CONCERNS WE'RE LOOKING AT WILL BE AN ARCTIC AIRMASS
INCOMING THAT WILL BRING COLD WINDS FOLLOWED BY A CHANCE OF SNOW
ON FRIDAY. FOR THURSDAY, WINDS SHOULD BE ON THE LIGHT SIDE,
WITH SKIES BECOMING MOSTLY CLOUDY BY THE AFTERNOON. FRIDAY THE
SNOW SHOULD BEGIN CREEPING INTO THE SITE BY THE MORNING HOURS,
BECOMING MORE LIKELY BY THE AFTERNOON, WITH TEMPERATURES UNABLE TO
EVEN REACH 25 DEGREES FOR THE DAY.
THURSDAY
SKY/WEATHER.........MOSTLY SUNNY (40-50 PERCENT) THEN BECOMING
MOSTLY CLOUDY (70-80 PERCENT).
CWR.................1 PERCENT.
MAX TEMPERATURE.....AROUND 32.
MIN HUMIDITY........28 PERCENT.
WIND (20 FT)........WEST WINDS 7 TO 10 MPH.
MIXING HEIGHT.......3600 FT AGL.
TRANSPORT WINDS.....WEST 18 TO 24 MPH DECREASING TO 13 TO 14 MPH
LATE IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR (13600 KNOT-FT) EARLY IN THE MORNING
INCREASING TO GOOD (76400 KNOT-FT) IN THE
AFTERNOON.
TIME (MST) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........25 25 38 38 38 57 57 57 68 68 68 73
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
TEMP............14 14 16 22 27 30 31 32 32 30 27 22
RH..............55 55 51 39 32 28 28 28 28 31 37 45
20 FT WIND DIR..SW SW SW SW W W W W W W W W
20 FT WIND SPD..8 8 8 8 9 9 10 10 10 9 7 7
20 FT WIND GUST.16 16 15 16 16 17 18 20 20 17 14 12
MIX HGT (KFT)...0.9 0.9 1.1 1.6 2.3 3.0 3.4 3.6 3.5 3.0 2.2 1.2
TRANSP WIND DIR.W W W W W W W W W W W W
TRANSP WIND SPD.22 21 21 21 22 23 24 24 23 18 14 13
SDSPL KT-FT/100017 17 20 29 45 60 72 76 70 48 26 14
THURSDAY NIGHT
SKY/WEATHER.........MOSTLY CLOUDY (70-80 PERCENT). SLIGHT CHANCE OF
SNOW EARLY IN THE MORNING.
CWR.................5 PERCENT.
MIN TEMPERATURE.....AROUND 10 ABOVE.
MAX HUMIDITY........76 PERCENT.
WIND (20 FT)........WEST WINDS AROUND 5 MPH EARLY IN THE EVENING
BECOMING LIGHT.
MIXING HEIGHT.......600 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 6 TO 8 MPH DECREASING TO AROUND 6 MPH
LATE IN THE EVENING.
SMOKE DISPERSAL.....POOR (2800 KNOT-FT).
TIME (MST) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........80 72 76 73 69 68 67 66 66 68 71 73
WEATHER COV..... SCH
WEATHER TYPE.... SN
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 10
TEMP............20 19 18 17 15 14 14 13 13 12 12 11
RH..............49 51 53 56 61 64 64 67 67 70 70 73
20 FT WIND DIR..W SW S S S S S S SE SE SE SE
20 FT WIND SPD..5 3 2 2 3 3 3 3 3 3 3 3
20 FT WIND GUST.9 7 6 6 6 7 7 7 7 7 7 6
MIX HGT (KFT)...1.0 0.8 0.7 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6
TRANSP WIND DIR.W W W SW SW S S S S S SW SW
TRANSP WIND SPD.8 8 6 6 6 6 6 6 6 6 6 6
SDSPL KT-FT/10007 6 4 3 3 3 3 3 3 3 3 3
FRIDAY
SKY/WEATHER.........MOSTLY CLOUDY (75-85 PERCENT). SLIGHT CHANCE OF
SNOW IN THE MORNING, THEN CHANCE OF SNOW LATE
IN THE MORNING. CHANCE OF SNOW SHOWERS LATE IN
THE AFTERNOON.
CWR.................12 PERCENT.
MAX TEMPERATURE.....AROUND 23.
MIN HUMIDITY........43 PERCENT.
WIND (20 FT)........LIGHT WINDS BECOMING NORTHWEST 5 TO 6 MPH EARLY
IN THE AFTERNOON, THEN SHIFTING TO THE NORTH
LATE IN THE AFTERNOON.
MIXING HEIGHT.......2700 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 6 TO 13 MPH SHIFTING TO THE WEST 7 TO
13 MPH IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR (2500 KNOT-FT).
TIME (MST) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........73 73 73 75 77 78 80 81 82 84 85 88
WEATHER COV.....SCH SCH SCH SCH SCH CHC CHC CHC CHC CHC CHC CHC
WEATHER TYPE....SN SN SN SN SN SN SN SN SN SN SN SW
TSTM COV........
CWR.............10 10 10 10 10 10 10 10 10 10 10 10
TEMP............10 10 12 15 19 22 23 23 21 18 15 15
RH..............76 73 66 58 51 45 43 45 49 59 67 67
20 FT WIND DIR..S S S S SW W W NW NW NW N N
20 FT WIND SPD..2 2 2 2 3 3 5 6 6 6 6 5
20 FT WIND GUST.6 6 6 6 7 8 9 10 10 10 9 14
MIX HGT (KFT)...0.5 0.4 0.6 1.1 1.8 2.3 2.6 2.7 2.7 2.4 2.1 1.8
TRANSP WIND DIR.SW S S SW SW W W W W W NW NW
TRANSP WIND SPD.6 7 8 9 10 12 13 13 13 12 9 7
SDSPL KT-FT/10003 3 4 9 16 23 29 30 30 24 17 11
FORECASTER...GOATLEY
REQUESTED BY...COYDE FICKEL
TYPE OF REQUEST...PRESCRIBED
.TAG 2600360.1/CYS
.DELDT 01/21/26
.FORMATTERVERSION 2.0.0
.EMAIL COYDE.FICKEL@USDA.GOV
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page