636
FNUS75 KCYS 260441
FWSCYS
SPOT FORECAST FOR HORSETOOTH...BLM
NATIONAL WEATHER SERVICE CHEYENNE WY
1041 PM MDT SAT JUL 25 2026
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE AT (307) 772-2227
..HEAT ADVISORY IN EFFECT UNTIL 9 PM MDT MONDAY
DISCUSSION
WEAK FLOW ACROSS THE AREA IS LEADING TO A TRICKY WIND FORECAST OVER
THE NEXT FEW DAYS. THE DOMINANT DIRECTION WILL BE SOUTHEAST THIS
EVENING, BECOMING NORTHWEST EARLY SUNDAY MORNING, NORTHEAST SUNDAY
LATE AFTERNOON AND EVENING, THEN SOUTH AGAIN ON MONDAY. HOWEVER,
SCATTERED SHOWER ACTIVITY LINGERING THIS EVENING WILL PRODUCE
OCCASIONALLY VARIABLE, GUSTY, AND ERRATIC WINDS. ANOTHER ROUND
OF HIGH-BASED SHOWERS AND THUNDERSTORMS PRODUCING VARIABLE, GUSTY,
AND ERRATIC WINDS IS ANTICIPATED SUNDAY BETWEEN ABOUT 2PM AND
MIDNIGHT. ANOTHER ROUND WILL KICK UP AS EARLY AS LATE MONDAY MORNING.
A FEW HUNDREDTHS OF AN INCH OF RAIN WILL BE POSSIBLE WITH THIS SHOWER
ACTIVITY, SO IT WON'T BE TRULY DRY, BUT THE CHANCE FOR WETTING RAINFALL
IS LOW (5% SUNDAY, INCREASING TO 11% MONDAY).
OTHERWISE, EXPECT HOT TEMPERATURES WITH HIGHS IN THE LOWER 100S
SUNDAY, PUSHING RH DOWN TO AROUND 15%. MONDAY WILL NOT BE AS HOT,
BUT STILL EXPECT HIGHS IN THE MID 90S.
REST OF TONIGHT
SKY/WEATHER.........PARTLY CLOUDY (25-35 PERCENT).
CWR.................5 PERCENT.
MIN TEMPERATURE.....AROUND 69.
MAX HUMIDITY........57 PERCENT.
WIND (20 FT)........VARIABLE BECOMING NORTHWEST 5 TO 10 MPH LATE.
MIXING HEIGHT.......400 FT AGL.
TRANSPORT WINDS.....SOUTHEAST 12 TO 14 MPH SHIFTING TO THE WEST 9
TO 12 MPH OVERNIGHT.
SMOKE DISPERSAL.....POOR (3700 KNOT-FT).
HAINES INDEX........MISSING.
TIME (MDT) 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........40 36 36 20 25 32 44
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............10 0 0 0 0 0 0
TEMP............79 77 76 74 72 71 71
RH..............43 44 47 50 53 55 54
20 FT WIND DIR..SE SE SW SW SW W NW
20 FT WIND SPD..3 3 2 2 2 2 2
20 FT WIND GUST.12 10 9 8 8 8 8
MIX HGT (KFT)...0.5 0.5 0.5 0.5 0.4 0.5 0.5
TRANSP WIND DIR.SE S W W W W NW
TRANSP WIND SPD.14 12 12 10 10 9 9
HAINES INDEX....M M M M M M M
SDSPL KT-FT/10006 5 5 5 4 4 4
SUNDAY
SKY/WEATHER.........MOSTLY SUNNY (35-45 PERCENT). SLIGHT CHANCE FOR
SHOWERS AND THUNDERSTORMS IN THE LATE AFTERNOON.
CWR.................0 PERCENT.
MAX TEMPERATURE.....AROUND 101.
MIN HUMIDITY........15 PERCENT.
WIND (20 FT)........NORTHWEST WINDS 7 TO 12 MPH WITH GUSTS TO AROUND
20 MPH. VARIABLE, GUSTY, AND ERRATIC WINDS EXPECTED
NEAR ISOLATED PM SHOWERS AND THUNDERSTORMS.
MIXING HEIGHT.......7500 FT AGL INCREASING TO 12800 FT AGL IN THE
AFTERNOON.
TRANSPORT WINDS.....NORTHWEST 10 TO 16 MPH.
SMOKE DISPERSAL.....POOR (4000 KNOT-FT) EARLY IN THE MORNING
INCREASING TO GOOD (97700 KNOT-FT) IN THE
AFTERNOON INCREASING TO VERY GOOD (126600
KNOT-FT) EARLY IN THE MORNING INCREASING TO
EXCELLENT (166900 KNOT-FT) IN THE AFTERNOON IN
THE AFTERNOON.
HAINES INDEX........MISSING.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........56 41 26 22 42 28 24 21 23 21 34 39
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
TEMP............70 73 77 82 89 93 95 97 99 99 99 100
RH..............57 52 45 37 28 23 20 18 16 16 15 15
20 FT WIND DIR..NW NW NW NW NW NW NW NW NW NW NW N
20 FT WIND SPD..3 3 3 5 7 9 10 8 7 7 6 6
20 FT WIND GUST.9 10 12 14 17 21 22 21 21 20 20 18
MIX HGT (KFT)...0.5 0.4 0.6 1.1 3.8 7.5 11 12 13 13 13 13
TRANSP WIND DIR.NW NW NW NW NW NW NW NW NW NW NW NW
TRANSP WIND SPD.10 10 12 13 15 15 16 16 15 14 13 12
HAINES INDEX....M M M M M M M M M M M M
SDSPL KT-FT/10004 4 6 12 49 98 150 167 166 153 139 127
SUNDAY NIGHT
SKY/WEATHER.........PARTLY CLOUDY (40-60 PERCENT). SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS EARLY IN THE EVENING.
CWR.................5 PERCENT.
MIN TEMPERATURE.....AROUND 70.
MAX HUMIDITY........55 PERCENT.
WIND (20 FT)........VARIABLE WINDS EXPECTED IN THE EVENING. OCCASIONALLY
GUSTY AND ERRATIC NEAR SHOWERS AND THUNDERSTORMS.
WINDS ARE EXPECTED TO BECOME NORTHEAST, THEN NORTH
OVERNIGHT.
MIXING HEIGHT.......9700 FT AGL DECREASING TO 400 FT AGL EARLY IN
THE EVENING.
TRANSPORT WINDS.....NORTHWEST 8 TO 9 MPH SHIFTING TO THE EAST 7 TO
16 MPH EARLY IN THE EVENING.
SMOKE DISPERSAL.....GOOD (96600 KNOT-FT) EARLY IN THE EVENING
DECREASING TO POOR (2700 KNOT-FT) LATE IN THE
NIGHT.
HAINES INDEX........MISSING.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........45 62 52 81 63 67 65 50 41 47 57 65
WEATHER COV.....SCH SCH
WEATHER TYPE....RW RW
TSTM COV........SCH SCH
CWR.............10 10 10 10 10 10 0 0 0 0 0 0
TEMP............99 96 93 85 82 80 79 77 76 74 73 72
RH..............16 18 22 30 34 36 39 43 45 50 51 53
20 FT WIND DIR..N NE E E NE E NE E N N N N
20 FT WIND SPD..6 5 5 7 6 5 3 2 2 2 2 2
20 FT WIND GUST.17 15 16 17 16 14 12 9 9 8 8 8
MIX HGT (KFT)...12 9.7 1.0 0.6 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.4
TRANSP WIND DIR.NW N E E E E E E NE E NE E
TRANSP WIND SPD.9 8 12 14 16 16 15 13 10 10 7 7
HAINES INDEX....M M M M M M M M M M M M
SDSPL KT-FT/100097 68 10 7 7 8 7 6 4 5 3 3
MONDAY
SKY/WEATHER.........PARTLY SUNNY (55-65 PERCENT). CHANCE OF SHOWERS
AND THUNDERSTORMS IN THE AFTERNOON.
CWR.................1 PERCENT INCREASING TO 11 PERCENT IN THE
AFTERNOON.
MAX TEMPERATURE.....AROUND 97.
MIN HUMIDITY........21 PERCENT.
WIND (20 FT)........WINDS LIGHT OUT OF THE SOUTH BUT OCCASIONALLY
VARIABLE. GUSTY AND ERRATIC WINDS ARE EXPECTED
NEAR SHOWERS AND THUNDERSTORMS.
MIXING HEIGHT.......10100 FT AGL INCREASING TO 12100 FT AGL LATE IN
THE AFTERNOON.
TRANSPORT WINDS.....EAST AROUND 6 MPH SHIFTING TO THE SOUTH 6 TO 8
MPH IN THE MORNING, THEN SHIFTING TO THE
SOUTHWEST 8 TO 17 MPH EARLY IN THE AFTERNOON
INCREASING TO AROUND 20 MPH LATE IN THE
AFTERNOON DECREASING TO AROUND 9 MPH.
SMOKE DISPERSAL.....POOR (2200 KNOT-FT) EARLY IN THE MORNING
INCREASING TO GOOD (88000 KNOT-FT) IN THE
AFTERNOON.
HAINES INDEX........MISSING.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........71 73 83 75 75 76 53 64 64 61 60 35
WEATHER COV..... SCH CHC CHC CHC
WEATHER TYPE.... RW RW RW RW
TSTM COV........ SCH CHC CHC CHC
CWR.............0 0 0 0 0 0 10 10 10 10 10 10
TEMP............71 74 77 81 86 90 92 94 96 94 93 91
RH..............55 50 46 41 34 28 26 23 21 23 23 25
20 FT WIND DIR..E S S S SE S SW W E S S SE
20 FT WIND SPD..2 2 2 3 6 6 7 7 6 7 7 7
20 FT WIND GUST.7 8 9 12 14 16 17 18 18 20 21 21
MIX HGT (KFT)...0.4 0.5 1.0 1.5 2.4 3.6 5.5 10 12 5.9 2.3 2.9
TRANSP WIND DIR.E SE S SW S S SW SW SW SW SW SW
TRANSP WIND SPD.6 6 7 8 7 8 9 8 8 17 20 9
HAINES INDEX....M M M M M M M M M M M M
SDSPL KT-FT/10002 2 6 10 15 25 44 71 85 88 39 23
FORECASTER...NATOLI
REQUESTED BY...SPAULDING
TYPE OF REQUEST...WILDFIRE
.TAG 2618262.0/CYS
.DELDT 07/25/26
.FORMATTERVERSION 2.0.0
.EMAIL WYCPC@FIRENET.GOV
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