187
FNUS75 KCYS 221021
FWSCYS
SPOT FORECAST FOR FISH CREEK...ALX
NATIONAL WEATHER SERVICE CHEYENNE WY
421 AM MDT WED JUL 22 2026
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE AT (307) 772-2227
DISCUSSION
A HIGH TEMPERATURE NEAR 80 IS EXPECTED TODAY BEFORE COOLING OFF DUE
TO INCREASED CLOUD COVER AND PRECIPITATION CHANCES. MINIMUM RELATIVE
HUMIDITY WILL BE AROUND 35 PERCENT WITH RELATIVELY LIGHT PREVAILING
WINDS. SCATTERED SHOWERS AND THUNDERSTORMS WILL DEVELOP BY EARLY
AFTERNOON, WITH HEAVY RAIN AND POTENTIAL FLASH FLOODING BEING THE
MAIN CONCERN. LIGHTNING AND GUSTY WINDS WILL ALSO BE POSSIBLE IN AND
AROUND STORMS. SCATTERED STORMS WILL CONTINUE INTO THE EVENING HOURS
WITH SHOWERS LINGERING OVERNIGHT. OVERNIGHT HUMIDITY RECOVERIES ARE
EXPECTED TO BE EXCELLENT WITH LIGHT WINDS. ANOTHER ROUND OF STORMS
ARE EXPECTED AGAIN THURSDAY AFTERNOON.
TODAY
SKY/WEATHER.........MOSTLY SUNNY (35-45 PERCENT) THEN BECOMING
MOSTLY CLOUDY (75-85 PERCENT). RAIN SHOWERS
LIKELY EARLY IN THE AFTERNOON. THUNDERSTORMS
LIKELY IN THE AFTERNOON. RAIN SHOWERS LATE IN
THE AFTERNOON.
CWR.................2 PERCENT INCREASING TO 72 PERCENT IN THE
AFTERNOON.
MAX TEMPERATURE.....AROUND 78.
MIN HUMIDITY........35 PERCENT.
WIND (20 FT)........NORTHWEST WINDS 5 TO 6 MPH IN THE MORNING
SHIFTING TO THE NORTH, THEN SHIFTING TO THE
NORTHEAST AROUND 5 MPH LATE IN THE AFTERNOON
BECOMING LIGHT. GUSTY AND ERRATIC WINDS
EXPECTED NEAR THUNDERSTORMS IN THE AFTERNOON.
MIXING HEIGHT.......6700 FT AGL.
TRANSPORT WINDS.....WEST 8 TO 14 MPH SHIFTING TO THE NORTH AROUND 7
MPH EARLY IN THE AFTERNOON, THEN SHIFTING TO
THE WEST 7 TO 9 MPH LATE IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR (4000 KNOT-FT) EARLY IN THE MORNING
INCREASING TO GOOD (60000 KNOT-FT) IN THE
AFTERNOON.
HAINES INDEX........MISSING.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........41 42 22 11 14 24 37 51 67 80 79 79
WEATHER COV..... LKY LKY LKY DEF DEF DEF
WEATHER TYPE.... RW RW RW RW RW RW
TSTM COV........ LKY LKY LKY LKY LKY LKY
CWR.............0 0 0 0 0 0 70 70 70 70 70 70
TEMP............56 61 68 71 74 77 78 76 71 69 67 67
RH..............77 62 51 46 41 37 35 40 51 57 63 63
20 FT WIND DIR..W W W NW NW NW NW N N NE E SE
20 FT WIND SPD..5 5 5 5 5 6 6 5 5 5 3 3
20 FT WIND GUST.9 9 9 9 9 9 9 9 9 8 7 7
MIX HGT (KFT)...0.6 0.6 1.0 2.3 3.6 4.9 6.7 6.3 5.0 3.8 2.4 1.9
TRANSP WIND DIR.W W W W W W W W N W W NW
TRANSP WIND SPD.8 9 12 13 14 12 10 8 7 9 8 7
HAINES INDEX....M M M M M M M M M M M M
SDSPL KT-FT/10004 4 10 25 43 50 60 44 30 30 17 12
TONIGHT
SKY/WEATHER.........MOSTLY CLOUDY (75-85 PERCENT). RAIN SHOWERS
LIKELY AND CHANCE OF THUNDERSTORMS EARLY IN THE
EVENING, THEN CHANCE OF RAIN SHOWERS IN THE
LATE EVENING AND OVERNIGHT. SLIGHT CHANCE OF
RAIN SHOWERS AFTER 3 AM.
CWR.................48 PERCENT DECREASING TO 11 PERCENT OVERNIGHT.
MIN TEMPERATURE.....AROUND 54.
MAX HUMIDITY........100 PERCENT.
WIND (20 FT)........LIGHT WINDS BECOMING SOUTH 5 TO 6 MPH IN THE
LATE EVENING AND OVERNIGHT, THEN SHIFTING TO
THE SOUTHWEST 6 TO 7 MPH AFTER 3 AM. GUSTY AND
ERRATIC WINDS EXPECTED NEAR THUNDERSTORMS EARLY
IN THE EVENING.
MIXING HEIGHT.......500 FT AGL.
TRANSPORT WINDS.....SOUTH 8 TO 13 MPH SHIFTING TO THE WEST 12 TO 14
MPH OVERNIGHT.
SMOKE DISPERSAL.....POOR (4900 KNOT-FT).
HAINES INDEX........MISSING.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........80 81 75 74 72 72 82 86 82 75 72 70
WEATHER COV.....LKY LKY LKY CHC CHC CHC CHC CHC CHC SCH SCH SCH
WEATHER TYPE....RW RW RW RW RW RW RW RW RW RW RW RW
TSTM COV........CHC CHC CHC
CWR.............50 50 50 50 50 50 10 10 10 10 10 10
TEMP............65 65 63 59 58 58 57 55 55 54 55 54
RH..............68 65 70 80 87 87 90 100 96 100 93 93
20 FT WIND DIR..SE SE S S S S S SW SW SW SW W
20 FT WIND SPD..3 3 3 5 5 5 6 6 6 6 6 7
20 FT WIND GUST.7 7 7 8 8 9 9 10 10 10 10 12
MIX HGT (KFT)...1.9 1.4 0.7 1.4 0.6 0.6 0.6 0.6 0.5 0.5 0.6 0.6
TRANSP WIND DIR.S SE SW S S S S W W W W W
TRANSP WIND SPD.8 9 8 12 13 10 10 12 13 13 14 14
HAINES INDEX....M M M M M M M M M M M M
SDSPL KT-FT/100013 11 5 14 6 5 5 6 6 6 7 7
THURSDAY
SKY/WEATHER.........MOSTLY SUNNY (45-55 PERCENT). CHANCE OF RAIN
SHOWERS IN THE MORNING, THEN RAIN SHOWERS WITH
THUNDERSTORMS LIKELY IN THE AFTERNOON.
CWR.................6 PERCENT INCREASING TO 71 PERCENT IN THE
AFTERNOON.
MAX TEMPERATURE.....AROUND 73.
MIN HUMIDITY........53 PERCENT.
WIND (20 FT)........WEST WINDS 7 TO 9 MPH. GUSTY AND ERRATIC WINDS
EXPECTED NEAR THUNDERSTORMS IN THE AFTERNOON.
MIXING HEIGHT.......5800 FT AGL.
TRANSPORT WINDS.....WEST 15 TO 22 MPH.
SMOKE DISPERSAL.....POOR (7300 KNOT-FT) EARLY IN THE MORNING
INCREASING TO VERY GOOD (106200 KNOT-FT) IN THE
AFTERNOON.
HAINES INDEX........MISSING.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........60 60 52 32 38 59 64 62 67 61 60 60
WEATHER COV.....SCH SCH SCH CHC CHC CHC DEF DEF DEF LKY LKY LKY
WEATHER TYPE....RW RW RW RW RW RW RW RW RW RW RW RW
TSTM COV........ LKY LKY LKY LKY LKY LKY
CWR.............10 10 10 10 10 10 70 70 70 70 70 70
TEMP............56 60 63 65 69 71 73 71 71 73 71 69
RH..............86 75 70 65 59 57 53 57 57 53 57 63
20 FT WIND DIR..W W W W W W W W NW NW NW NW
20 FT WIND SPD..7 7 7 8 8 9 9 9 8 8 7 7
20 FT WIND GUST.12 13 14 15 16 16 17 16 16 15 14 13
MIX HGT (KFT)...0.6 0.6 1.7 2.5 3.4 4.6 5.6 5.8 5.1 3.9 3.6 3.3
TRANSP WIND DIR.W W W W W W W W W W W W
TRANSP WIND SPD.15 15 17 21 22 22 22 18 18 20 20 20
HAINES INDEX....M M M M M M M M M M M M
SDSPL KT-FT/10007 8 25 46 65 87 106 93 81 66 61 56
FORECASTER...FULLER
REQUESTED BY...IC
TYPE OF REQUEST...WILDFIRE
.TAG 2617928.0/CYS
.DELDT 07/22/26
.FORMATTERVERSION 2.0.0
.EMAIL WYCPC@FIRENET.GOV
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page