Spot Forecast
Issued by NWS Riverton, WY
Issued by NWS Riverton, WY
725
FNUS75 KRIW 132056
FWSRIW
Spot Forecast for Bare...USFS
National Weather Service Riverton WY
256 PM MDT Thu Aug 13 2026
Forecast is based on forecast start time of 0600 MDT on August 14.
If conditions become unrepresentative, contact the National Weather
Service
.DISCUSSION...
Friday will remain cooler and cloudy, with continued but decreased
chances for showers and thunderstorms. The best chances will come
between 1300 and 1900. Strong outflow wind gusts to 35 mph remain
possible with this activity. Otherwise, minimum relative humidity
will be lower than on Thursday by 15 to 20 percent, with winds a
little stronger out of the west to southwest. Wind will become
lighter after sunset. Saturday will be slightly warmer, with
thunderstorm chances persisting in the afternoon.
...Thunderstorms imply strong gusty and erratic winds...
.FRIDAY...
Sky/weather.........Mostly cloudy. Chance of showers and
thunderstorms, especially after 1200.
CWR.................0 percent increasing to 33 percent in the
afternoon.
Chance of pcpn......70 percent.
Chance of thunder...47 percent.
Max temperature.....Around 62.
Min humidity........60 percent.
Wind (20 ft)........Light winds until 1300, then west 7 to 8 mph
with gusts to around 17 mph. Gusty and erratic
winds expected near any showers or
thunderstorms.
Ridgetop wind.......West 10 to 15 mph.
Mixing height.......Increasing to 4500 ft AGL by 1300.
Transport winds.....West 8 to 16 mph.
Smoke dispersal.....Poor increasing to good by 1500.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........60 80 70 65 60 55 60 70 70 60 75 70
Weather cov.....SCH SCH SCH CHC CHC CHC LKY LKY LKY 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 30 30 30 30 30 30
Chc of pcpn (%).20 20 20 30 30 30 60 70 70 50 40 50
Chc of thdr (%).10 10 10 10 10 10 50 50 50 40 40 40
Temp............47 45 47 50 54 57 58 59 60 60 60 62
RH..............90 96 97 93 85 77 69 65 61 60 61 59
20 FT wind dir..W W W W W W SW SW SW W W W
20 FT wind spd..3 3 3 3 4 5 6 7 7 8 8 7
20 FT wind gust.6 6 6 6 8 10 12 14 14 16 17 16
Ridge wind dir..W W W W W W SW SW SW W W W
Ridge wind spd..10 10 10 10 10 10 10 15 15 15 15 15
Mix hgt (kft)...0.5 0.5 1.0 1.5 2.5 3.5 4.0 4.5 4.5 4.5 4.0 3.5
Transp wind dir.W W W W W W W W SW W W W
Transp wind spd.12 10 10 8 9 10 12 14 14 16 15 15
SDspl kt-ft/10006 5 8 12 21 30 40 53 55 63 51 46
.FRIDAY NIGHT...
Sky/weather.........Mostly cloudy. Slight chance of showers
thunderstorms early in the evening.
CWR.................1 percent.
Chance of pcpn......20 percent.
Chance of thunder...21 percent.
Min temperature.....Around 43.
Max humidity........86 percent.
Wind (20 ft)........West winds around 7 mph with gusts to around 16
mph until 1900, then light. Gusty and erratic
winds expected near showers or thunderstorms.
Ridgetop wind.......West 10 to 15 mph.
Mixing height.......Decreasing to 500 ft AGL after 2000.
Transport winds.....West 8 to 14 mph.
Smoke dispersal.....Becoming poor after 1900.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........70 75 90 55 70 75 55 80 70 65 50 60
Weather cov.....SCH SCH SCH SCH
Weather type....RW RW RW RW
Tstm cov........SCH SCH SCH SCH
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
Chc of pcpn (%).20 10 10 10 0 10 0 0 0 10 10 10
Chc of thdr (%).20 10 10 10 0 10 0 0 0 10 10 10
Temp............60 59 57 54 52 50 50 49 48 47 45 45
RH..............63 67 70 75 82 83 83 83 85 87 86 85
20 FT wind dir..W W W W W SW W W W W W W
20 FT wind spd..7 6 6 5 4 4 3 3 3 3 3 3
20 FT wind gust.16 13 10 10 7 6 6 6 6 6 6 6
Ridge wind dir..W W W W W SW W W W W W W
Ridge wind spd..15 15 10 10 10 10 10 10 10 10 10 10
Mix hgt (kft)...3.5 2.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5
Transp wind dir.W W W W SW W W SW W W W SW
Transp wind spd.14 13 12 10 9 9 8 8 8 8 9 8
SDspl kt-ft/100041 30 6 5 4 4 4 4 4 4 5 4
.SATURDAY...
Sky/weather.........Slight chance of rain showers in the morning,
then chance of showers and thunderstorms in
the afternoon.
CWR.................0 percent increasing to 19 percent in the
afternoon.
Chance of pcpn......60 percent.
Chance of thunder...41 percent.
Max temperature.....Around 64.
Min humidity........52 percent.
Wind (20 ft)........West to southwest winds 3 to 6 mph with gusts
to 15 mph.
Ridgetop wind.......West 10 to 15 mph.
Mixing height.......Increasing to 7500 ft AGL by 1200.
Transport winds.....West 7 to 14 mph.
Smoke dispersal.....Poor increasing to good after 1200.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........45 50 45 35 40 45 50 55 60 60 55 50
Weather cov.....SCH SCH SCH SCH SCH SCH LKY LKY LKY LKY LKY LKY
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 60 60 60 60 60 60
Chc of thdr (%).10 10 10 10 10 10 40 40 40 40 40 40
Temp............45 44 46 50 54 58 61 62 62 62 62 63
RH..............86 89 88 83 75 66 58 55 54 54 52 51
20 FT wind dir..W W W W W SW SW W W W W W
20 FT wind spd..3 2 2 2 3 5 6 6 6 6 6 6
20 FT wind gust.6 5 5 5 6 10 11 13 14 14 14 14
Ridge wind dir..W W W W W SW SW W W W W W
Ridge wind spd..10 5 5 5 10 10 10 15 15 15 15 15
Mix hgt (kft)...0.5 0.5 1.5 2.0 4.0 5.5 7.5 6.5 6.0 5.5 5.5 5.0
Transp wind dir.W SW SW SW SW W W W W W W W
Transp wind spd.8 9 8 7 8 10 13 13 14 14 14 14
SDspl kt-ft/10004 5 9 12 26 50 80 73 72 64 63 63
.FORECAST DAYS 3 THROUGH 5...
.SUNDAY...
Mostly clear. Lows in the lower 40s. Highs in the upper 60s.
Minimum humidity around 39 percent. West winds 4 to 8 mph with
gusts to 12 mph.
.MONDAY...
Partly cloudy. Lows in the mid 40s. Highs in the upper 60s.
Minimum humidity around 37 percent. West to southwest winds 4 to
8 mph with gusts to 12 mph..
.TUESDAY...
Mostly cloudy. Chance of showers and thunderstorms. Lows in the
upper 40s. Highs in the upper 60s. Minimum humidity around 40
percent. West 5 to 10 mph with gusts to 15 mph.
$$
Forecaster...Myers
Requested by...Stan Mitchem
Type of request...WILDFIRE
.TAG 2619432.2/RIW
.DELDT 08/13/26
.FormatterVersion 2.0.0
.EMAIL Stan@mitchem.com,paul_mitchem@firenet.gov