462
FNUS75 KCYS 211221
FWSCYS
SPOT FORECAST FOR BUCK/OBSIDIAN RX...USFS
NATIONAL WEATHER SERVICE CHEYENNE WY
521 AM MST WED JAN 21 2026
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE AT (307) 772-2227
DISCUSSION
A SURFACE COLD FRONT WILL PUSH TO THE SOUTH ACROSS THE REGION,
LITTLE TO NO PRECIPITATION ASSOCIATED WITH IT. COLDER
TEMPERATURES AND MIN RH VALUES GENERALLY ABOVE 25% FOR THIS
FORECAST PERIOD WITH GOOD OVERNIGHT RECOVERY.
REST OF TODAY
SKY/WEATHER.........SUNNY (10-20 PERCENT).
CWR.................0 PERCENT.
MAX TEMPERATURE.....AROUND 32 DEGREES.
MIN HUMIDITY........20 TO 35 PERCENT.
WIND (20 FT)........WEST WINDS 15 TO 25 MPH. GUSTS UP TO 35 MPH
EARLY IN THE MORNING.
MIXING HEIGHT.......3800 FT AGL.
TRANSPORT WINDS.....WEST 23 TO 32 MPH INCREASING TO 31 TO 35 MPH
LATE IN THE AFTERNOON, THEN DECREASING TO
AROUND 24 MPH LATE IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR (15900 KNOT-FT) EARLY IN THE MORNING
INCREASING TO VERY GOOD (114300 KNOT-FT) IN THE
AFTERNOON.
TIME (MST) 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........10 2 2 2 10 10 10 21 21 21 28
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0
TEMP............14 18 22 27 29 30 31 30 30 27 22
RH..............55 46 39 32 31 29 30 31 31 35 43
20 FT WIND DIR..SW W W W W W W W W W W
20 FT WIND SPD..17 16 15 14 14 14 15 15 15 15 15
20 FT WIND GUST.38 36 28 26 25 26 28 29 29 29 28
MIX HGT (KFT)...0.8 1.1 1.7 2.3 3.2 3.6 3.7 3.8 3.6 2.6 1.1
TRANSP WIND DIR.SW SW W W W W W W W W W
TRANSP WIND SPD.23 23 26 29 30 32 33 35 33 31 24
SDSPL KT-FT/100016 21 39 58 83 100 108 114 104 69 24
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY (25-35 PERCENT) THEN BECOMING
MOSTLY CLOUDY (50-60 PERCENT).
CWR.................0 PERCENT.
MIN TEMPERATURE.....AROUND 15 DEGREES.
MAX HUMIDITY........50 TO 65 PERCENT.
WIND (20 FT)........WEST WINDS 9 TO 14 MPH.
MIXING HEIGHT.......700 FT AGL.
TRANSPORT WINDS.....WEST 20 TO 23 MPH.
SMOKE DISPERSAL.....POOR (13300 KNOT-FT).
TIME (MST) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........28 28 51 51 51 62 62 62 60 60 60 49
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
TEMP............21 20 20 19 19 18 18 19 18 18 17 17
RH..............45 47 45 47 47 49 49 47 49 49 51 51
20 FT WIND DIR..W W W W SW SW SW W W W W W
20 FT WIND SPD..14 13 12 12 10 9 9 9 9 9 10 10
20 FT WIND GUST.26 24 23 21 18 17 17 17 17 18 18 20
MIX HGT (KFT)...0.9 0.7 0.8 0.8 0.8 0.8 0.8 0.9 0.9 0.9 0.9 0.9
TRANSP WIND DIR.W W W W W W W W W W W W
TRANSP WIND SPD.23 21 21 20 20 20 20 20 21 21 22 21
SDSPL KT-FT/100019 13 14 14 14 14 14 15 17 17 18 16
THURSDAY
SKY/WEATHER.........PARTLY CLOUDY (40-50 PERCENT) THEN BECOMING
MOSTLY CLOUDY (70-80 PERCENT).
CWR.................0 PERCENT.
MAX TEMPERATURE.....AROUND 32 DEGREES.
MIN HUMIDITY........25 TO 35 PERCENT.
WIND (20 FT)........WEST WINDS 7 TO 9 MPH. GUSTS UP TO 23 MPH.
MIXING HEIGHT.......3600 FT AGL.
TRANSPORT WINDS.....WEST 18 TO 24 MPH DECREASING TO 9 TO 14 MPH
LATE IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR (12000 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 (%).........49 49 44 44 44 71 71 71 79 79 79 80
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
TEMP............17 16 18 24 26 29 29 30 31 29 27 25
RH..............51 53 49 38 35 31 31 31 30 34 38 42
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 9 9 9 8 7 7
20 FT WIND GUST.20 20 20 21 21 22 23 23 23 22 20 13
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 1.5
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 9
SDSPL KT-FT/100017 17 20 29 45 60 72 76 70 48 26 12
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
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