119
FNUS75 KCYS 251121
FWSCYS
SPOT FORECAST FOR MOONSHINE FIRE...USWFS
NATIONAL WEATHER SERVICE CHEYENNE WY
521 AM MDT FRI SEP 25 2026
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE AT (307) 772-2227
DISCUSSION
INCREASING CONFIDENCE THAT A LINE OF SHOWERS AND
THUNDERSTORMS WILL PUSH ACROSS THE BURN AREA BETWEEN 1500 AND 1900.
LOCALLY HEAVY RAINFALL AND GUSTY WINDS UP TO 40 MPH ARE POSSIBLE
WITH THIS LINE OF STORMS. AS FOR THIS MORNING, LOW CLOUDS AND PATCHY
FOG EXPECTED WITH MOST OF THE FOG REMAINING BELOW 6500 FEET.
SEASONABLE TODAY WITH NEAR AVERAGE TEMPERATURES AND HIGH HUMIDITIES
THROUGH TONIGHT. DRYING TREND IS EXPECTED THIS WEEKEND AS DAYTIME
RELATIVE HUMIDITIES TREND LOWER BY SATURDAY.
TODAY
SKY/WEATHER.........MOSTLY CLOUDY (70-80 PERCENT) THEN BECOMING
PARTLY SUNNY (55-65 PERCENT). PATCHY FOG EARLY
IN THE MORNING. SCATTERED SHOWERS AND
THUNDERSTORMS IN THE AFTERNOON.
CWR.................INCREASING TO 25 TO 30 PERCENT IN THE
AFTERNOON.
MAX TEMPERATURE.....AROUND 70 DEGREES.
MIN HUMIDITY........45 TO 55 PERCENT.
WIND (20 FT)........LIGHT SOUTH WINDS BECOMING SOUTHWEST 8 TO 15 MPH
LATE IN THE AFTERNOON. GUSTY AND ERRATIC WINDS
EXPECTED NEAR THUNDERSTORMS.
MIXING HEIGHT.......5000 FT AGL.
TRANSPORT WINDS.....SOUTH 5 TO 13 MPH SHIFTING TO THE WEST 16 TO 18
MPH LATE IN THE AFTERNOON.
SMOKE DISPERSAL.....GOOD (61100 KNOT-FT) IN THE AFTERNOON.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........77 77 77 48 48 48 66 66 66 75 75 75
WEATHER COV.....PTY PTY PTY SCT SCT SCT SCT SCT SCT
WEATHER TYPE....FOG FOG FOG RW RW RW RW RW RW
TSTM COV........ SCT SCT SCT SCT SCT SCT
CWR.............0 0 0 0 0 0 30 30 30 30 30 30
TEMP............52 50 52 56 60 63 66 69 69 68 68 66
RH..............95 100 96 83 71 64 57 53 53 55 55 56
20 FT WIND DIR..S S S SE SE SE SE SE S S S SW
20 FT WIND SPD..2 2 2 6 7 7 8 8 8 8 8 8
20 FT WIND GUST.6 7 9 10 13 14 16 16 16 16 16 16
MIX HGT (KFT)...0.5 0.5 0.7 1.5 2.4 3.2 4.1 4.9 5.0 4.1 3.5 3.6
TRANSP WIND DIR.SE SE SE SE S S S S S S SW W
TRANSP WIND SPD.5 6 7 9 12 10 12 12 12 13 16 18
SDSPL KT-FT/10002 3 5 12 25 29 41 49 51 45 50 61
TONIGHT
SKY/WEATHER.........MOSTLY CLOUDY (50-60 PERCENT) THEN BECOMING
PARTLY CLOUDY (25-35 PERCENT). ISOLATED RAIN
SHOWERS EARLY IN THE EVENING.
CWR.................5 PERCENT.
MIN TEMPERATURE.....50 TO 55 DEGREES.
MAX HUMIDITY........60 TO 70 PERCENT.
WIND (20 FT)........SOUTHWEST WINDS 10 TO 20 MPH WITH GUSTS TO
AROUND 30 MPH SHIFTING TO THE WEST 15 TO 25 MPH
WITH GUSTS TO AROUND 40 MPH AFTER 3 AM.
MIXING HEIGHT.......500 FT AGL.
TRANSPORT WINDS.....WEST 8 TO 17 MPH INCREASING TO 21 TO 28 MPH
OVERNIGHT.
SMOKE DISPERSAL.....FAIR (3500 KNOT-FT).
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........54 54 54 42 42 42 29 29 29 18 18 18
WEATHER COV.....ISO ISO ISO
WEATHER TYPE....RW RW RW
TSTM COV........
CWR.............10 10 10 10 10 10 0 0 0 0 0 0
TEMP............65 63 60 59 58 57 57 57 57 57 55 55
RH..............59 59 63 62 60 59 55 55 54 54 57 57
20 FT WIND DIR..SW SW SW SW SW SW SW SW W W W W
20 FT WIND SPD..8 8 9 9 10 12 12 14 15 16 17 20
20 FT WIND GUST.16 16 18 18 21 22 24 28 30 33 35 39
MIX HGT (KFT)...2.1 0.7 0.5 0.5 0.5 0.5 0.5 0.6 0.5 0.6 0.5 0.5
TRANSP WIND DIR.W W W SW W W W W W W W W
TRANSP WIND SPD.13 8 9 13 15 17 21 24 28 28 28 28
SDSPL KT-FT/100025 5 4 6 6 8 10 12 13 13 13 13
SATURDAY
SKY/WEATHER.........SUNNY (15-25 PERCENT).
CWR.................0 PERCENT.
MAX TEMPERATURE.....AROUND 78 DEGREES.
MIN HUMIDITY........20 TO 25 PERCENT.
WIND (20 FT)........WEST WINDS 15 TO 25 MPH WITH GUSTS TO AROUND 40
MPH DECREASING TO 5 TO 12 MPH LATE IN THE
AFTERNOON.
MIXING HEIGHT.......10300 FT AGL.
TRANSPORT WINDS.....WEST 20 TO 28 MPH.
SMOKE DISPERSAL.....EXCELLENT (176800 KNOT-FT).
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........11 11 11 4 4 4 5 5 5 36 36 36
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
TEMP............55 53 56 60 66 70 74 76 78 78 78 76
RH..............58 61 55 47 38 33 28 25 23 23 23 24
20 FT WIND DIR..W W W W W W W W W W W W
20 FT WIND SPD..20 21 20 20 17 16 16 15 13 12 10 9
20 FT WIND GUST.39 40 39 39 33 31 30 28 24 23 20 17
MIX HGT (KFT)...0.5 0.5 0.7 1.1 2.6 5.0 8.0 8.7 9.7 10 9.1 7.6
TRANSP WIND DIR.W W W W W W W W W W W W
TRANSP WIND SPD.28 28 28 24 25 22 21 21 21 20 20 20
SDSPL KT-FT/100013 13 17 24 57 97 145 159 177 176 156 133
REQUESTED BY...WADE FROSETH
TYPE OF REQUEST...WILDFIRE
.TAG 2622198.3/CYS
.DELDT 09/25/26
.FORMATTERVERSION 2.0.0
.EMAIL ASPAULDING@BLM.GOV,WFROSETH@BLM.GOV
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