126
FNUS75 KCYS 180851
FWSCYS
SPOT FORECAST FOR POLE MTN PRESCIBED...USFS
NATIONAL WEATHER SERVICE CHEYENNE WY
251 AM MDT SUN OCT 18 2026
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE AT (307) 772-2227
DISCUSSION
WINDS WILL BE OUT OF THE WEST IN THE MORNING SWITCHING TO THE NORTH
IN THE AFTERNOON DUE TO A COLD FRONT DROPPING DOWN FROM THE NORTH.
DURING AND RIGHT AFTER THE FRONTAL PASSAGE MIXING WILL BE ENHANCED,
INCREASING SMOKE DISPERSAL IN THE AFTERNOON. WINDS ARE EXPECTED TO
DIE DOWN AFTER 4PM FOR THE POLE MTN AREA. AFTERNOON RH VALUES ARE
EXPECTED TO DROP TO AROUND 20 PERCENT WITH A RECOVERY NEAR 60
PERCENT OVERNIGHT. THE NOCTURNAL INVERSION SHOULD STRENGTHEN AGAIN
OVERNIGHT SO POOR SMOKE DISPERSAL SHOULD BE EXPECTED IN THE NIGHT
AND EARLY MORNING HOURS.
REST OF TODAY
SKY/WEATHER.........SUNNY (15-25 PERCENT) THEN BECOMING PARTLY
SUNNY (55-65 PERCENT).
CWR.................2 PERCENT.
MAX TEMPERATURE.....AROUND 57.
MIN HUMIDITY........19 PERCENT.
WIND (20 FT)........WEST WINDS 5 TO 13 MPH SHIFTING TO THE
NORTHEAST AROUND 6 MPH LATE IN THE AFTERNOON.
MIXING HEIGHT.......5500 FT AGL.
TRANSPORT WINDS.....WEST 10 TO 16 MPH SHIFTING TO THE NORTHEAST
AROUND 9 MPH LATE IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR (7100 KNOT-FT) EARLY IN THE MORNING
INCREASING TO FAIR (49500 KNOT-FT) IN THE
AFTERNOON.
TIME (MDT) 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........7 15 15 15 28 28 28 58 58 58
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0
TEMP............45 46 48 50 52 53 55 57 55 52
RH..............24 23 21 19 19 19 19 19 22 27
20 FT WIND DIR..W W W W W W NW NW N NE
20 FT WIND SPD..13 12 10 9 8 7 6 5 5 6
20 FT WIND GUST.24 23 21 18 15 13 10 9 9 10
MIX HGT (KFT)...0.5 0.5 0.9 1.9 2.8 4.2 5.1 5.5 5.3 3.0
TRANSP WIND DIR.W W W W W W W W W NE
TRANSP WIND SPD.16 15 15 14 13 10 10 10 10 9
SDSPL KT-FT/10007 7 11 23 31 38 46 50 47 24
TONIGHT
SKY/WEATHER.........MOSTLY CLOUDY (60-70 PERCENT) THEN BECOMING
PARTLY CLOUDY (40-50 PERCENT).
CWR.................3 PERCENT.
MIN TEMPERATURE.....AROUND 40.
MAX HUMIDITY........62 PERCENT.
WIND (20 FT)........EAST WINDS 5 TO 6 MPH EARLY IN THE EVENING
BECOMING LIGHT, THEN BECOMING SOUTH 5 TO 6 MPH
OVERNIGHT.
MIXING HEIGHT.......500 FT AGL.
TRANSPORT WINDS.....EAST 8 TO 10 MPH SHIFTING TO THE SOUTH 10 TO 12
MPH LATE IN THE EVENING.
SMOKE DISPERSAL.....POOR (3400 KNOT-FT).
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........64 64 64 72 72 72 55 55 55 47 47 47
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
TEMP............50 48 46 44 43 42 41 41 40 40 40 40
RH..............32 35 40 45 49 53 59 59 62 62 59 59
20 FT WIND DIR..E E E E SE SE SE S S S S S
20 FT WIND SPD..6 6 5 3 3 3 5 5 5 6 6 6
20 FT WIND GUST.12 10 9 8 8 8 8 9 9 10 10 10
MIX HGT (KFT)...0.7 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5
TRANSP WIND DIR.E E E E E S S S S S S S
TRANSP WIND SPD.9 10 9 8 9 10 12 12 12 12 12 10
SDSPL KT-FT/10006 5 4 3 4 5 5 5 5 5 5 5
MONDAY
SKY/WEATHER.........SUNNY (20-30 PERCENT).
CWR.................0 PERCENT.
MAX TEMPERATURE.....AROUND 56.
MIN HUMIDITY........34 PERCENT.
WIND (20 FT)........SOUTH WINDS 5 TO 10 MPH.
MIXING HEIGHT.......4300 FT AGL.
TRANSPORT WINDS.....SOUTH 10 TO 16 MPH.
SMOKE DISPERSAL.....POOR (4200 KNOT-FT) EARLY IN THE MORNING
INCREASING TO FAIR (42700 KNOT-FT) IN THE
AFTERNOON.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........42 42 42 35 35 35 5 5 5 13 13 13
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
TEMP............40 40 41 42 46 50 53 54 54 56 54 52
RH..............59 59 57 57 49 42 36 34 35 34 36 41
20 FT WIND DIR..S S S S S S S S S S S S
20 FT WIND SPD..6 6 6 5 5 5 5 6 7 7 9 10
20 FT WIND GUST.10 10 10 9 9 8 8 10 13 15 17 18
MIX HGT (KFT)...0.5 0.5 0.5 0.4 1.3 2.1 2.8 3.7 4.3 3.9 3.1 2.2
TRANSP WIND DIR.S S SW S S S S S S S S S
TRANSP WIND SPD.10 10 10 12 12 14 13 10 12 12 14 16
SDSPL KT-FT/10005 5 4 4 13 25 30 33 43 39 38 30
FORECASTER...MCLAUGHLIN
REQUESTED BY...COYDE FICKEL
TYPE OF REQUEST...PRESCRIBED
.TAG 2623834.1/CYS
.DELDT 10/18/26
.FORMATTERVERSION 2.0.0
.EMAIL COYDE.FICKEL@USDA.GOV
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