550
FNUS75 KRIW 120113
FWSRIW
SPOT FORECAST FOR BUCK FIRE...WY-BTF
NATIONAL WEATHER SERVICE RIVERTON WY
713 PM MDT THU SEP 11 2025
FORECAST IS BASED ON FORECAST START TIME OF 1900 MDT ON SEPTEMBER 11.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE
DISCUSSION
SCATTERED RAIN SHOWERS AND AN ISOLATED THUNDERSTORM OR TWO WILL
CONTINUE TO PUSH THROUGH WESTERN WYOMING THIS EVENING INTO
TONIGHT. CHANCES ARE NOT HIGH, ONLY AROUND 10-15% OF DIRECT
IMPACTS AT THE FIRE. WIND WILL DECREASE IN THE NEXT COUPLE OF
HOURS WITH WIND BECOMING LIGHT BY 2200L. TOMORROW RAIN AND
THUNDERSTORM CHANCES WILL INCREASE IN THE MORNING WITH SCATTERED
SHOWERS AND STORMS IN THE AFTERNOON. A SOUTHERLY BREEZE TOMORROW
AFTERNOON OF 10-15 MPH WILL BECOME NORTHWESTERLY BY 1500L-1600L.
..THUNDERSTORMS IMPLY STRONG GUSTY AND ERRATIC WINDS
REST OF TONIGHT
SKY/WEATHER.........MOSTLY CLOUDY (60-70 PERCENT). ISOLATED RAIN
SHOWERS AND THUNDERSTORMS OVERNIGHT.
CWR.................0 PERCENT.
CHANCE OF PCPN......15 PERCENT.
CHANCE OF THUNDER...3 PERCENT.
MIN TEMPERATURE.....AROUND 39.
MAX HUMIDITY........79 PERCENT.
WIND (20 FT)........LIGHT WINDS.
RIDGETOP WIND.......SOUTHWEST AROUND 10 MPH UNTIL 0100, THEN
EAST.
MIXING HEIGHT.......3500 FT AGL UNTIL 2000, THEN 1500 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 9 TO 12 MPH UNTIL 2400, THEN EAST.
SMOKE DISPERSAL.....POOR.
TIME (MDT) 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........60 60 60 60 65 60 65 60 55 75 75
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0
CHC OF PCPN (%).0 0 0 10 10 10 10 10 10 10 10
CHC OF THDR (%).0 0 0 0 0 0 0 0 0 0 0
TEMP............68 64 60 57 55 52 50 49 47 46 45
RH..............28 30 35 40 43 48 54 56 60 63 65
20 FT WIND DIR..W SW SW SW SW SW E E E E E
20 FT WIND SPD..6 5 4 4 4 5 4 4 6 5 5
20 FT WIND GUST.7 6 6 6 6 6 6 6 7 6 6
RIDGE WIND DIR..W SW SW SW SW SW E E E E E
RIDGE WIND SPD..10 10 10 10 10 10 10 10 10 10 10
MIX HGT (KFT)...3.5 1.5 2.0 2.0 2.0 1.5 1.5 2.0 2.0 2.0 2.0
TRANSP WIND DIR.W W SW SW SW E E E SE E SE
TRANSP WIND SPD.12 10 9 9 9 10 9 9 12 10 10
SDSPL KT-FT/100033 15 14 14 14 16 14 14 18 16 16
FRIDAY
SKY/WEATHER.........PARTLY SUNNY (50-60 PERCENT). ISOLATED RAIN
SHOWERS EARLY IN THE MORNING. SCATTERED RAIN
SHOWERS AND ISOLATED THUNDERSTORMS IN THE
AFTERNOON.
CWR.................7 PERCENT.
CHANCE OF PCPN......40 PERCENT.
CHANCE OF THUNDER...23 PERCENT.
MAX TEMPERATURE.....AROUND 73.
MIN HUMIDITY........32 PERCENT.
WIND (20 FT)........LIGHT WINDS UNTIL 1500, THEN SOUTH AROUND 7 MPH
UNTIL 1600, THEN NORTHWEST. GUSTY AND ERRATIC
WINDS EXPECTED NEAR THUNDERSTORMS.
RIDGETOP WIND.......EAST AROUND 10 MPH UNTIL 1300, THEN SOUTH UNTIL
1700, THEN NORTHWEST.
MIXING HEIGHT.......2000 FT AGL UNTIL 1000, THEN GRADUALLY INCREASING
TO 9000 FT AGL BY 1200, UNTIL 1600, THEN 7000 FT
AGL.
TRANSPORT WINDS.....SOUTHEAST AROUND 10 MPH UNTIL 1000, THEN SOUTH
10 TO 15 MPH.
SMOKE DISPERSAL.....POOR UNTIL 1000, THEN GOOD IN THE MORNING
INCREASING TO VERY GOOD IN THE AFTERNOON AFTER
1500.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........75 65 55 50 35 35 40 65 65 75 65 60
WEATHER COV..... ISO ISO ISO ISO SCT SCT SCT SCT SCT SCT
WEATHER TYPE.... RW RW RW RW RW RW RW RW RW RW
TSTM COV........ ISO ISO ISO ISO ISO ISO
CWR.............0 0 0 0 0 0 10 10 10 10 10 10
CHC OF PCPN (%).10 10 20 20 20 20 30 40 40 40 40 30
CHC OF THDR (%).0 0 0 0 0 0 20 20 20 20 20 20
TEMP............43 39 41 45 55 63 69 71 71 72 70 69
RH..............70 79 78 72 62 48 38 36 33 32 36 38
20 FT WIND DIR..NE NE E E E SE SE SE S S S NW
20 FT WIND SPD..5 5 5 5 5 6 6 5 6 7 6 6
20 FT WIND GUST.6 6 6 6 6 7 7 6 10 10 10 7
RIDGE WIND DIR..NE NE E E E SE SE SE S S S NW
RIDGE WIND SPD..10 10 10 10 10 10 10 10 15 15 15 10
MIX HGT (KFT)...1.5 2.0 1.5 2.0 4.0 6.5 9.0 9.0 9.0 9.0 7.0 6.5
TRANSP WIND DIR.E E E SE S S S S S S S S
TRANSP WIND SPD.10 10 10 10 10 12 12 10 13 14 13 12
SDSPL KT-FT/100016 16 16 19 36 65 92 82 98 110 77 65
FRIDAY NIGHT
SKY/WEATHER.........MOSTLY CLOUDY (65-75 PERCENT) THEN BECOMING
PARTLY CLOUDY (45-55 PERCENT). ISOLATED SHOWERS
AND THUNDERSTORMS IN THE EVENING, THEN CHANCE
OF RAIN SHOWERS AND SLIGHT CHANCE OF
THUNDERSTORMS OVERNIGHT.
CWR.................2 PERCENT.
CHANCE OF PCPN......30 PERCENT.
CHANCE OF THUNDER...22 PERCENT.
MIN TEMPERATURE.....AROUND 36.
MAX HUMIDITY........95 PERCENT.
WIND (20 FT)........LIGHT WINDS. GUSTY AND ERRATIC WINDS EXPECTED
NEAR THUNDERSTORMS.
RIDGETOP WIND.......NORTH AROUND 10 MPH UNTIL 2000, THEN NORTHEAST
UNTIL 2400, THEN EAST UNTIL 0500, THEN LIGHT.
MIXING HEIGHT.......5000 FT AGL UNTIL 1900, THEN 1500 FT AGL.
TRANSPORT WINDS.....SOUTH AROUND 10 MPH UNTIL 1900, THEN NORTHWEST
6 TO 11 MPH UNTIL UNTIL 2400, THEN SOUTHEAST 5
TO 10 MPH.
SMOKE DISPERSAL.....FAIR UNTIL 1900, THEN POOR.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........55 55 80 75 70 70 65 60 55 55 50 50
WEATHER COV.....ISO ISO ISO ISO ISO ISO CHC CHC CHC CHC CHC CHC
WEATHER TYPE....RW RW RW RW RW RW RW RW RW RW RW RW
TSTM COV........ISO ISO ISO ISO ISO ISO SCH SCH SCH SCH SCH SCH
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
CHC OF PCPN (%).20 20 20 20 20 20 30 30 30 30 30 30
CHC OF THDR (%).20 20 20 10 10 10 10 10 10 20 20 20
TEMP............69 63 59 53 51 49 47 45 44 43 41 40
RH..............39 47 54 61 64 67 72 78 84 90 95 98
20 FT WIND DIR..NW N NE NE N NE SE SE E E E E
20 FT WIND SPD..3 5 3 3 3 3 4 4 4 3 3 2
20 FT WIND GUST.10 8 7 6 6 6 6 6 6 6 6 5
RIDGE WIND DIR..NW N NE NE N NE SE SE E E E E
RIDGE WIND SPD..10 10 10 10 10 10 10 10 10 10 10 5
MIX HGT (KFT)...5.0 2.0 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5
TRANSP WIND DIR.S NW NW N N NE E SE SE SE SE SE
TRANSP WIND SPD.10 10 8 8 8 8 9 9 9 8 8 7
SDSPL KT-FT/100044 18 12 12 12 12 14 14 14 12 12 10
SATURDAY
SKY/WEATHER.........PARTLY SUNNY (50-60 PERCENT). SLIGHT CHANCE OF
RAIN SHOWERS AND THUNDERSTORMS IN THE MORNING,
THEN CHANCE OF SHOWERS AND THUNDERSTORMS IN THE
AFTERNOON.
CWR.................0 PERCENT INCREASING TO 15 PERCENT IN THE
AFTERNOON.
CHANCE OF PCPN......50 PERCENT.
CHANCE OF THUNDER...33 PERCENT.
MAX TEMPERATURE.....AROUND 69.
MIN HUMIDITY........38 PERCENT.
WIND (20 FT)........LIGHT WINDS. GUSTY AND ERRATIC WINDS EXPECTED
NEAR THUNDERSTORMS IN THE LATE MORNING AND
AFTERNOON.
RIDGETOP WIND.......LIGHT WINDS UNTIL 1000, THEN SOUTHWEST AROUND
10 MPH UNTIL 1200, THEN WEST.
MIXING HEIGHT.......2000 FT AGL UNTIL 1000, THEN 5500 FT AGL UNTIL
1200, THEN 8500 FT AGL UNTIL 1700, THEN 5500 FT
AGL.
TRANSPORT WINDS.....SOUTH AROUND 7 MPH UNTIL 1000, THEN WEST 8 TO
14 MPH.
SMOKE DISPERSAL.....POOR UNTIL 1000, THEN GOOD IN THE MORNING
INCREASING TO VERY GOOD IN THE AFTERNOON AFTER
1300.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........50 50 50 50 50 45 40 50 55 65 65 60
WEATHER COV.....SCH SCH SCH SCH SCH SCH CHC CHC CHC CHC CHC CHC
WEATHER TYPE....RW RW RW RW RW RW RW RW RW RW RW RW
TSTM COV........ SCH SCH SCH CHC CHC CHC CHC CHC CHC
CWR.............0 0 0 0 0 0 20 20 20 20 20 20
CHC OF PCPN (%).20 20 20 20 20 20 50 50 50 50 50 50
CHC OF THDR (%).10 10 10 10 10 10 30 30 30 30 30 30
TEMP............39 39 40 43 49 57 63 66 68 68 68 66
RH..............100 100 100 96 83 66 52 45 41 40 40 41
20 FT WIND DIR..E E SE SE S SW W W W W W W
20 FT WIND SPD..2 2 2 2 3 4 5 6 6 6 6 6
20 FT WIND GUST.5 5 5 5 6 7 10 11 13 14 14 14
RIDGE WIND DIR..E E SE SE S SW W W W W W W
RIDGE WIND SPD..5 5 5 5 10 10 10 10 15 15 15 15
MIX HGT (KFT)...1.5 2.0 2.0 2.0 4.0 5.5 7.0 7.5 8.0 8.5 7.0 5.5
TRANSP WIND DIR.SE S S SW SW W W W W W W W
TRANSP WIND SPD.7 7 7 7 8 9 10 12 13 14 13 13
SDSPL KT-FT/100010 11 12 13 26 43 62 74 87 102 78 62
FORECAST DAYS 3 THROUGH 5
SUNDAY
PARTLY CLOUDY. LOWS IN THE MID 30S. HIGHS IN THE LOWER 70S. LIGHT
WINDS.
MONDAY
PARTLY CLOUDY. CHANCE OF SHOWERS AND SLIGHT CHANCE OF
THUNDERSTORMS. LOWS IN THE UPPER 30S. HIGHS IN THE UPPER 60S.
LIGHT WINDS.
TUESDAY
PARTLY CLOUDY. CHANCE OF SHOWERS AND THUNDERSTORMS. LOWS IN THE
LOWER 30S. HIGHS IN THE UPPER 60S. LIGHT WINDS.
FORECASTER...ROWE
REQUESTED BY...HEATHER MCDONALD/ TIDC
TYPE OF REQUEST...WILDFIRE
.TAG 2521840.0/RIW
.DELDT 09/11/25
.FORMATTERVERSION 2.0.0
.EMAIL WYTDC@FIRENET.GOV
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page