013
FNUS75 KCYS 150208
FWSCYS
SPOT FORECAST FOR ROOT...USFS
NATIONAL WEATHER SERVICE CHEYENNE WY
808 PM MDT MON SEP 14 2026
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE AT (307) 772-2227
DISCUSSION
DRY TONIGHT WITH GOOD OVERNIGHT RH RECOVERY AND MOST OF TUESDAY
WITH A NEAR ZERO CHANCE OF WETTING RAINS. WINDS WILL CONTINUE TO
WIND DOWN TONIGHT AND SHIFT TO THE EAST TO LESS THAN 10 MPH.
LIGHTER WINDS WILL CONTINUE INTO TUESDAY, AHEAD OF A STORM SYSTEM
THAT WILL BRING HIGHER CHANCES OF WETTING RAINS EARLY TUESDAY
AFTERNOON/EVENING ALONG WITH STRENGTHENING WINDS.
TONIGHT
SKY/WEATHER.........MOSTLY CLEAR (0-10 PERCENT).
CWR.................0 PERCENT.
MIN TEMPERATURE.....AROUND 37.
MAX HUMIDITY........67 PERCENT.
WIND (20 FT)........NORTH WINDS 7 TO 12 MPH SHIFTING TO THE EAST
AROUND 5 MPH AFTER 3 AM.
MIXING HEIGHT.......500 FT AGL.
TRANSPORT WINDS.....NORTHWEST 14 TO 16 MPH SHIFTING TO THE NORTH 13
TO 15 MPH LATE IN THE EVENING, THEN SHIFTING TO
THE EAST 7 TO 12 MPH OVERNIGHT SHIFTING TO THE
SOUTHEAST AROUND 6 MPH EARLY IN THE MORNING.
SMOKE DISPERSAL.....POOR (2600 KNOT-FT).
TIME (MDT) 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........2 6 6 6 8 8 8 9 9 9
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0
TEMP............58 54 51 48 45 44 42 40 39 38
RH..............20 24 29 35 45 49 53 59 62 64
20 FT WIND DIR..NW N N NE NE NE E E E E
20 FT WIND SPD..12 7 7 8 10 8 7 6 5 5
20 FT WIND GUST.22 14 14 16 18 16 13 10 8 8
MIX HGT (KFT)...0.7 0.6 0.6 0.5 0.6 0.5 0.5 0.5 0.5 0.5
TRANSP WIND DIR.W NW N N NE NE E E E SE
TRANSP WIND SPD.16 14 14 15 13 12 9 8 7 6
SDSPL KT-FT/100010 7 7 7 6 5 4 4 3 3
TUESDAY
SKY/WEATHER.........SUNNY (20-30 PERCENT).
CWR.................1 PERCENT.
MAX TEMPERATURE.....AROUND 68.
MIN HUMIDITY........27 PERCENT.
WIND (20 FT)........SOUTHEAST WINDS 5 TO 8 MPH SHIFTING TO THE
SOUTHWEST 7 TO 8 MPH IN THE AFTERNOON.
MIXING HEIGHT.......7800 FT AGL.
TRANSPORT WINDS.....SOUTH 6 TO 14 MPH INCREASING TO SOUTHWEST 16 TO
25 MPH LATE IN THE MORNING.
SMOKE DISPERSAL.....POOR (2700 KNOT-FT) EARLY IN THE MORNING
INCREASING TO GOOD (66300 KNOT-FT) IN THE
AFTERNOON INCREASING TO GOOD (96500 KNOT-FT)
EARLY IN THE MORNING INCREASING TO EXCELLENT
(170800 KNOT-FT) IN THE AFTERNOON IN THE
AFTERNOON.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........9 9 9 9 9 9 25 25 25 39 39 39
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
TEMP............37 41 45 49 53 57 61 63 65 68 66 65
RH..............67 59 53 48 41 35 32 30 29 27 30 34
20 FT WIND DIR..SE SE SE SE SE S S S SW SW SW S
20 FT WIND SPD..5 6 7 7 7 8 8 8 8 8 7 7
20 FT WIND GUST.9 10 12 14 15 16 16 16 16 15 14 13
MIX HGT (KFT)...0.5 0.5 0.5 1.5 2.3 3.3 4.4 5.9 7.2 7.8 7.6 5.7
TRANSP WIND DIR.S S SE S S S SW SW SW SW SW SW
TRANSP WIND SPD.6 7 8 12 14 16 17 21 22 25 23 20
SDSPL KT-FT/10003 3 4 15 27 46 66 106 136 171 151 97
TUESDAY NIGHT
SKY/WEATHER.........PARTLY CLOUDY (45-55 PERCENT) THEN BECOMING
MOSTLY CLOUDY (50-60 PERCENT) THEN BECOMING
PARTLY CLOUDY (30-40 PERCENT). CHANCE OF RAIN
SHOWERS EARLY IN THE EVENING.
CWR.................17 PERCENT DECREASING TO 3 PERCENT OVERNIGHT.
MIN TEMPERATURE.....AROUND 52.
MAX HUMIDITY........71 PERCENT.
WIND (20 FT)........SOUTH WINDS 7 TO 13 MPH SHIFTING TO THE
SOUTHWEST AFTER 3 AM.
MIXING HEIGHT.......500 FT AGL.
TRANSPORT WINDS.....SOUTH 15 TO 20 MPH.
SMOKE DISPERSAL.....FAIR (46900 KNOT-FT) EARLY IN THE EVENING
DECREASING TO POOR (7600 KNOT-FT) LATE IN THE
NIGHT.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........49 49 49 56 56 56 37 37 37 32 32 32
WEATHER COV.....CHC CHC CHC
WEATHER TYPE....RW RW RW
TSTM COV........
CWR.............20 20 20 20 20 20 0 0 0 0 0 0
TEMP............64 61 59 56 55 53 52 52 52 53 53 53
RH..............38 44 51 59 61 69 71 71 71 71 69 69
20 FT WIND DIR..SE SE S S S S S S S SW SW SW
20 FT WIND SPD..7 8 10 12 13 13 13 13 12 12 12 12
20 FT WIND GUST.13 16 20 23 24 25 25 24 24 23 23 22
MIX HGT (KFT)...3.4 1.8 0.8 0.6 0.5 0.5 0.5 0.5 0.6 0.5 0.5 0.6
TRANSP WIND DIR.S S S S S S S S SW SW SW SW
TRANSP WIND SPD.16 15 15 16 18 18 20 17 18 18 16 16
SDSPL KT-FT/100047 23 11 8 9 9 9 8 9 9 8 8
FORECASTER...ZAWISLAK
REQUESTED BY...LEE BURKE
TYPE OF REQUEST...WILDFIRE
.TAG 2621903.0/CYS
.DELDT 09/14/26
.FORMATTERVERSION 2.0.0
.EMAIL LEE.BURKE@USDA.GOV,WYCPC@FIRENET.GOV
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