304
FNUS75 KRIW 131433
FWSRIW
SPOT FORECAST FOR HORSE FIRE PILES...USFS
NATIONAL WEATHER SERVICE RIVERTON WY
733 AM MST THU NOV 13 2025
FORECAST IS BASED ON IGNITION TIME OF 0700 MST ON NOVEMBER 13.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE
DISCUSSION
SOUTHWEST WINDS TODAY 7 TO 10 MPH, WITH GUSTS 15 TO 20 MPH
THROUGHOUT THE DAY. THE SKY REMAINS MOSTLY CLEAR, WITH NO
PRECIPITATION CHANCES. GUSTY SOUTHWEST WINDS CONTINUE INTO TONIGHT,
WITH GUSTS NEAR 20 MPH. PRECIPITATION CHANCES BEGIN TO INCREASE
AFTER 0200. CHANCES WILL BE 30 PERCENT OR GREATER STARTING AROUND
SUNRISE. PRECIPITATION MODE WOULD MOST LIKELY BE SNOW, THOUGH COULD
HAVE RAIN MIX, ESPECIALLY DURING DAY TIME HOURS. CLOUDY CONDITIONS
WITH PRECIPITATION CHANCES (30% TO 45%) OCCUR FRIDAY AFTERNOON AND
EVENING. WINDS REMAIN FROM THE SOUTHWEST THROUGH FRIDAY.
..THUNDERSTORMS IMPLY STRONG GUSTY AND ERRATIC WINDS
TODAY
SKY/WEATHER.........SUNNY (10 PERCENT).
CWR.................0 PERCENT.
CHANCE OF PCPN......0 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....AROUND 47.
MIN HUMIDITY........50 PERCENT.
WIND (20 FT)........LIGHT SOUTHWEST WINDS UNTIL 1100, THEN SOUTHWEST
AROUND 10 MPH WITH GUSTS 15 TO 20 MPH UNTIL 1700,
THEN LIGHT SOUTH-SOUTHWEST.
RIDGETOP WIND.......SOUTHWEST 10 TO 15 MPH.
MIXING HEIGHT.......2000 FT AGL AFTER 0900 UNTIL 1200, THEN 2500 FT
AGL UNTIL 1700, THEN 500 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 12 TO 17 MPH.
SMOKE DISPERSAL.....POOR.
TIME (MST) MID 1AM 2AM 3AM 4AM 5AM 6AM 7AM 8AM 9AM 10A
SKY (%).........25 25 15 15 15 15 10 10 5 5 10
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0
CHC OF PCPN (%).0 0 0 0 0 0 0 0 0 0 0
CHC OF THDR (%).0 0 0 0 0 0 0 0 0 0 0
TEMP............35 34 39 42 43 46 47 47 46 44 40
RH..............59 64 52 55 49 52 50 50 54 54 60
20 FT WIND DIR..W SW W SW SW SW SW SW SW SW SW
20 FT WIND SPD..6 6 6 6 7 8 10 10 9 8 6
20 FT WIND GUST.7 8 8 10 11 13 16 16 14 13 10
RIDGE WIND DIR..W SW W SW SW SW SW SW SW SW SW
RIDGE WIND SPD..10 10 10 15 15 15 15 15 15 15 15
MIX HGT (KFT)...0.1 0.1 0.5 1.0 2.0 2.5 2.5 2.5 2.5 1.5 0.5
TRANSP WIND DIR.W SW SW SW SW W W SW SW SW SW
TRANSP WIND SPD.12 12 12 13 14 15 17 17 17 15 13
SDSPL KT-FT/10002 1 4 12 22 30 40 40 39 21 5
TONIGHT
SKY/WEATHER.........MOSTLY CLEAR (20-30 PERCENT). CHANCE OF SNOW
SHOWERS EARLY IN THE MORNING.
CWR.................0 PERCENT.
CHANCE OF PCPN......30 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MIN TEMPERATURE.....AROUND 32.
MAX HUMIDITY........70-75 PERCENT.
WIND (20 FT)........SOUTHWEST 7 TO 10 MPH WITH GUSTS TO AROUND 15 MPH.
OCCASIONAL WIND GUSTS TO AROUND 20 MPH.
RIDGETOP WIND.......SOUTHWEST 10 TO 15 MPH.
MIXING HEIGHT.......AROUND 500 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 12 TO 18 MPH.
SMOKE DISPERSAL.....POOR.
TIME (MST) 11A 12P 1PM 2PM 3PM 4PM 5PM 6PM 7PM 8PM 9PM 10P
SKY (%).........20 20 10 20 25 15 15 15 15 30 40 35
WEATHER COV..... CHC
WEATHER TYPE.... SW
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
CHC OF PCPN (%).0 0 0 0 0 10 10 10 10 10 10 30
CHC OF THDR (%).0 0 0 0 0 0 0 0 0 0 0 0
TEMP............39 36 36 35 33 35 35 36 35 35 35 35
RH..............63 67 67 69 69 67 64 62 64 64 65 67
20 FT WIND DIR..SW S S S SW SW SW SW SW SW SW SW
20 FT WIND SPD..6 6 7 7 8 8 9 8 10 10 10 9
20 FT WIND GUST.8 8 11 11 13 13 14 13 16 16 16 14
RIDGE WIND DIR..SW S S S SW SW SW SW SW SW SW SW
RIDGE WIND SPD..10 10 15 15 15 15 15 15 15 15 15 15
MIX HGT (KFT)...0.5 0.5 0.1 0.5 0.5 0.5 0.5 0.5 0.1 0.5 0.1 0.5
TRANSP WIND DIR.SW SW SW SW SW SW SW SW SW SW SW SW
TRANSP WIND SPD.12 12 14 14 15 15 17 18 18 18 18 16
SDSPL KT-FT/10005 3 3 3 5 4 4 5 4 5 4 4
FRIDAY
SKY/WEATHER.........MOSTLY SUNNY (45-55 PERCENT) THEN BECOMING
MOSTLY CLOUDY (65-75 PERCENT). CHANCE OF SNOW
SHOWERS THROUGH THE DAY. CHANCE OF RAIN SHOWERS
IN THE LATE MORNING AND AFTERNOON.
CWR.................4 PERCENT.
CHANCE OF PCPN......50 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....AROUND 43.
MIN HUMIDITY........65 PERCENT.
WIND (20 FT)........SOUTHWEST WINDS 10 TO 12 MPH. GUSTS TO AROUND 20 MPH.
RIDGETOP WIND.......SOUTHWEST 15 TO 20 MPH.
MIXING HEIGHT.......2000 FT AGL UNTIL 1100, THEN 3000 FT AGL UNTIL
1700, THEN 1000 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 15 TO 25 MPH UNTIL 1200. WEST AROUND
20 MPH AFTER 1700.
SMOKE DISPERSAL.....POOR UNTIL 1100, THEN FAIR TO GOOD IN UNTIL 1500,
THEN POOR.
TIME (MST) 11P MID 1AM 2AM 3AM 4AM 5AM 6AM 7AM 8AM 9AM 10A
SKY (%).........40 50 55 40 55 70 70 70 70 70 70 70
WEATHER COV.....CHC CHC CHC CHC CHC CHC CHC CHC CHC CHC CHC CHC
WEATHER TYPE....SW SW SW SW RS RS RS RS RS RS RS RS
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
CHC OF PCPN (%).30 30 30 30 30 50 50 50 50 50 50 30
CHC OF THDR (%).0 0 0 0 0 0 0 0 0 0 0 0
TEMP............33 32 35 39 41 42 43 43 42 41 39 38
RH..............68 72 73 68 67 68 70 71 72 74 75 76
20 FT WIND DIR..S SW SW SW SW SW SW W W W W W
20 FT WIND SPD..9 9 9 10 10 11 11 11 11 10 9 8
20 FT WIND GUST.14 14 14 16 16 17 17 17 17 16 14 13
RIDGE WIND DIR..S SW SW SW SW SW SW W W W W W
RIDGE WIND SPD..15 15 15 15 15 20 20 20 20 15 15 15
MIX HGT (KFT)...0.5 0.5 0.5 1.0 2.0 2.5 2.5 3.0 3.0 2.5 1.5 1.0
TRANSP WIND DIR.SW SW SW SW SW SW SW W W W W W
TRANSP WIND SPD.16 16 16 17 20 24 26 28 30 26 23 20
SDSPL KT-FT/10005 6 10 19 33 55 63 69 78 54 34 18
FORECAST DAYS 3 THROUGH 5
SATURDAY
MOSTLY CLOUDY. CHANCE OF SHOWERS AND SNOW SHOWERS. LOWS IN THE
LOWER 30S. HIGHS IN THE LOWER 40S. WEST WINDS 7 TO 10 MPH.
SUNDAY
MOSTLY CLOUDY. CHANCE OF SHOWERS AND SNOW SHOWERS. LOWS IN THE
UPPER 20S. HIGHS AROUND 40. WEST TO SOUTHWEST WINDS 10 MPH OR LESS.
MONDAY
SNOW SHOWERS. LOWS IN THE UPPER 20S. HIGHS IN THE LOWER 30S.
WEST WINDS AROUND 10 MPH, WITH OCCASIONAL GUSTS NEAR 15 MPH.
FORECASTER...WITTMANN
REQUESTED BY...CODY NORTON
TYPE OF REQUEST...PRESCRIBED
.TAG 2525818.0/RIW
.DELDT 11/13/25
.FORMATTERVERSION 2.0.0
.EMAIL CODY.NORTON@USDA.GOV
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