547
FNUS75 KCYS 260336
FWSCYS
SPOT FORECAST FOR SOUTH FORK...USFS
NATIONAL WEATHER SERVICE CHEYENNE WY
936 PM MDT THU JUN 25 2026
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE AT (307) 772-2227
DISCUSSION
SHOWERS LOOK TO END TONIGHT, WITH SSE WINDS OF 10-15 MPH GRADUALLY
SHIFTING TO MORE SSW BY SUNRISE AND INCREASING TO 15-20 MPH. GUSTS OF 25-30 MPH
WILL BE POSSIBLE THROUGH THE OVERNIGHT PERIOD. AS FOR RECOVERIES, RH VALUES WILL
INCREASE TO 85-95% AS LOW-LEVEL MOISTURE REMAINS IN PLACE.
HEADING INTO FRIDAY, EXPECT LITTLE TO NO PRECIPITATION UNTIL 4 PM WITH RH TO DECREASING TO
45-55% BY THE AFTERNOON. A FEW SHOWERS AND THUNDERSTORMS ARE POSSIBLE AFTER 3 PM WHICH
WILL BE CAPABLE OF PRODUCING HEAVY RAINFALL, AND WINDS OF 10-15 MPH. FRIDAY NIGHT RECOVERIES
WILL RANGE FROM 80-90% WITH SOUTHERLY WINDS EXPECTED TO GUST UP TO 20-25 MPH.
PRECIPITATION CHANCES DIMINISH ON SATURDAY WITH RH VALUES OF 20-30% BY THE AFTERNOON WITH WIND
GUSTS AS HIGH AS 25-30 MPH FROM THE WSW. SATURDAY NIGHT EXPECT FAIR RECOVERIES OF 55-65% AND WINDS
SHIFTING TO MORE WESTERLY, RANGING FROM 10-15 MPH. SIMILAR CONDITIONS ON SUNDAY WITH RH VALUES OF 15-25%
AND SSE WINDS OF 10-15 MPH GUSTING TO 20-25 MPH.
REST OF TONIGHT
SKY/WEATHER.........MOSTLY CLOUDY (65-75 PERCENT) THEN BECOMING
PARTLY CLOUDY (40-50 PERCENT).
CWR.................2 PERCENT.
MIN TEMPERATURE.....AROUND 54.
MAX HUMIDITY........95-100 PERCENT.
WIND (20 FT)........SOUTH WINDS 12 TO 15 MPH.
MIXING HEIGHT.......500 FT AGL.
TRANSPORT WINDS.....SOUTH 15 TO 18 MPH.
SMOKE DISPERSAL.....POOR (6300 KNOT-FT).
HAINES INDEX........MISSING.
TIME (MDT) MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........84 82 57 47 40 44
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0
TEMP............58 58 57 56 56 55
RH..............82 83 87 90 93 96
20 FT WIND DIR..S S S S S S
20 FT WIND SPD..14 14 14 14 15 15
20 FT WIND GUST.28 29 29 30 29 26
MIX HGT (KFT)...0.6 0.8 0.6 0.6 0.5 0.5
TRANSP WIND DIR.S S S S S SW
TRANSP WIND SPD.16 17 18 17 16 15
HAINES INDEX....M M M M M M
SDSPL KT-FT/100011 16 15 12 9 10
FRIDAY
SKY/WEATHER.........SUNNY (20-30 PERCENT) THEN BECOMING PARTLY
SUNNY (55-65 PERCENT). SCATTERED SHOWERS AND
THUNDERSTORMS LATE IN THE AFTERNOON.
CWR.................0 PERCENT INCREASING TO 13 PERCENT IN THE
AFTERNOON.
MAX TEMPERATURE.....AROUND 89.
MIN HUMIDITY........31 PERCENT.
WIND (20 FT)........SOUTH WINDS 10 TO 16 MPH. GUSTS UP TO 29 MPH
INCREASING TO 35 MPH LATE IN THE AFTERNOON.
GUSTY AND ERRATIC WINDS EXPECTED NEAR
THUNDERSTORMS LATE IN THE AFTERNOON.
MIXING HEIGHT.......6900 FT AGL.
TRANSPORT WINDS.....SOUTH 12 TO 20 MPH INCREASING TO AROUND 26 MPH
LATE IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR (6400 KNOT-FT) EARLY IN THE MORNING
INCREASING TO GOOD (92400 KNOT-FT) IN THE
AFTERNOON INCREASING TO GOOD (97800 KNOT-FT)
EARLY IN THE MORNING INCREASING TO VERY GOOD
(124400 KNOT-FT) IN THE AFTERNOON LATE IN THE
AFTERNOON.
HAINES INDEX........MISSING.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........43 31 15 11 6 5 3 13 18 15 39 58
WEATHER COV..... ISO SCT
WEATHER TYPE.... RW RW
TSTM COV........ ISO SCT
CWR.............0 0 0 0 0 0 10 10 10 10 10 10
TEMP............55 58 63 67 73 77 81 84 87 88 86 84
RH..............97 92 82 73 60 53 43 39 34 30 33 38
20 FT WIND DIR..SW SW SW SW S S S S S SE SE S
20 FT WIND SPD..14 13 13 12 12 12 12 12 13 14 16 16
20 FT WIND GUST.24 22 21 20 20 21 22 24 26 29 31 35
MIX HGT (KFT)...0.6 0.7 0.8 1.0 1.8 2.6 3.6 4.7 6.1 6.8 6.9 4.2
TRANSP WIND DIR.SW S SW SW S S S S S S S S
TRANSP WIND SPD.13 14 14 13 12 13 13 14 14 15 20 26
HAINES INDEX....M M M M M M M M M M M M
SDSPL KT-FT/10007 11 13 16 21 32 44 62 80 92 124 115
FRIDAY NIGHT
SKY/WEATHER.........MOSTLY CLOUDY (60-70 PERCENT) THEN BECOMING
MOSTLY CLEAR (15-25 PERCENT). SCATTERED SHOWERS
AND THUNDERSTORMS EARLY IN THE EVENING.
CWR.................6 PERCENT.
MIN TEMPERATURE.....AROUND 63.
MAX HUMIDITY........70-79 PERCENT.
WIND (20 FT)........BREEZY. SOUTH WINDS 15 TO 25 MPH WITH GUSTS TO
AROUND 44 MPH. GUSTY AND ERRATIC WINDS EXPECTED
NEAR THUNDERSTORMS EARLY IN THE EVENING. GUSTY
AND ERRATIC WINDS EXPECTED NEAR THUNDERSTORMS
OVERNIGHT.
MIXING HEIGHT.......500 FT AGL.
TRANSPORT WINDS.....SOUTH 21 TO 29 MPH.
SMOKE DISPERSAL.....FAIR (46100 KNOT-FT) EARLY IN THE EVENING
DECREASING TO POOR (10700 KNOT-FT) LATE IN THE
NIGHT.
HAINES INDEX........MISSING.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........80 60 53 54 51 37 6 15 10 29 13 17
WEATHER COV.....SCT ISO ISO ISO
WEATHER TYPE....RW RW RW RW
TSTM COV........SCT ISO ISO ISO
CWR.............10 10 10 10 10 10 0 0 0 0 0 0
TEMP............83 81 76 74 72 70 69 68 67 65 64 64
RH..............42 44 52 55 58 62 64 66 68 71 72 73
20 FT WIND DIR..S SE S S S S S S S S S S
20 FT WIND SPD..16 17 21 21 24 24 24 24 25 24 25 25
20 FT WIND GUST.36 36 39 40 43 44 44 44 44 44 43 43
MIX HGT (KFT)...2.0 1.2 0.7 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.5
TRANSP WIND DIR.S S S S S S S SW SW SW SW SW
TRANSP WIND SPD.22 21 21 22 25 26 29 29 28 28 26 26
HAINES INDEX....M M M M M M M M M M M M
SDSPL KT-FT/100046 32 16 12 16 17 17 16 15 16 16 14
SATURDAY
SKY/WEATHER.........MOSTLY SUNNY (30-40 PERCENT).
CWR.................2 PERCENT.
MAX TEMPERATURE.....AROUND 94.
MIN HUMIDITY........16 PERCENT.
WIND (20 FT)........BREEZY. SOUTHWEST WINDS 12 TO 25 MPH DECREASING
TO 12 TO 15 MPH IN THE AFTERNOON. GUSTS UP TO
41 MPH.
MIXING HEIGHT.......7700 FT AGL INCREASING TO 14000 FT AGL IN THE
AFTERNOON.
TRANSPORT WINDS.....SOUTHWEST 22 TO 26 MPH.
SMOKE DISPERSAL.....POOR (10600 KNOT-FT) EARLY IN THE MORNING
INCREASING TO VERY GOOD (104500 KNOT-FT) IN THE
AFTERNOON INCREASING TO EXCELLENT (245500
KNOT-FT).
HAINES INDEX........MISSING.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........19 24 17 17 31 22 35 35 57 41 38 35
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
TEMP............63 67 71 75 82 85 88 91 92 93 93 91
RH..............75 67 56 46 34 27 21 18 17 16 16 18
20 FT WIND DIR..S S SW SW SW SW SW SW SW S S S
20 FT WIND SPD..25 23 21 20 17 16 15 14 13 13 14 14
20 FT WIND GUST.41 41 38 36 36 32 32 33 32 35 33 35
MIX HGT (KFT)...0.5 0.8 1.1 1.8 3.0 4.9 7.7 11 13 13 14 13
TRANSP WIND DIR.SW SW SW SW SW SW SW SW SW SW SW SW
TRANSP WIND SPD.25 25 25 24 22 22 22 24 24 26 23 23
HAINES INDEX....M M M M M M M M M M M M
SDSPL KT-FT/100014 21 27 41 64 105 157 239 296 317 303 260
FORECASTER...BRAUER
REQUESTED BY...DUELL PUTTERGILL
TYPE OF REQUEST...WILDFIRE
.TAG 2616240.0/CYS
.DELDT 06/25/26
.FORMATTERVERSION 2.0.0
.EMAIL DUELL.PUTTERGILL@USDA.GOV
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