Spot Forecast
Issued by NWS Riverton, WY
Issued by NWS Riverton, WY
471
FNUS75 KRIW 302201
FWSRIW
Spot Forecast for Porqupine...USFS
National Weather Service Riverton WY
401 PM MDT Mon Jun 30 2025
Forecast is based on forecast start time of 1600 MDT on June 30.
If conditions become unrepresentative, contact the National Weather
Service
.DISCUSSION...
South-southwest wind continues through the afternoon. Skies will
be mostly clear through much of the day, with high-based cumulus
for a few hours late in the afternoon into the evening. RH
recovery will be poor tonight. There will be a chance (20%) for
virga showers/thunderstorms between 1500 and 2000 Tuesday.
Precipitation chances will be possible Wednesday, with increasing
chances Wednesday night into Thursday. There will be a good chance
for a wetting rain from these storms.
...Thunderstorms imply strong gusty and erratic winds...
.REST OF TODAY...
Sky/weather.........Sunny (5-15 percent).
CWR.................0 percent.
Chance of pcpn......0 percent.
Chance of thunder...1 percent.
Max temperature.....Around 74.
Min humidity........22 percent.
Wind (20 ft)........Southwest winds 8 to 9 mph.
Ridgetop wind.......West around 15 mph.
Mixing height.......10500 ft AGL.
Transport winds.....West 15 to 16 mph.
Smoke dispersal.....Very good.
TIME (MDT) 10A 11A
Sky (%).........5 10
Weather cov.....
Weather type....
Tstm cov........
CWR.............0 0
Chc of pcpn (%).0 0
Chc of thdr (%).0 0
Temp............73 72
RH..............24 22
20 FT wind dir..W W
20 FT wind spd..8 9
20 FT wind gust.11 13
Ridge wind dir..W W
Ridge wind spd..15 15
Mix hgt (kft)...10 11
Transp wind dir.W W
Transp wind spd.15 16
SDspl kt-ft/1000133 146
.TONIGHT...
Sky/weather.........Mostly clear (10-20 percent).
CWR.................0 percent.
Chance of pcpn......0 percent.
Chance of thunder...1 percent.
Min temperature.....Around 49.
Max humidity........46 percent.
Wind (20 ft)........Northwest winds around 5 to 10 mph until 1900, then
light.
Ridgetop wind.......Northwest 10 to 15 mph until 2100, then
northeast until 0100, then southeast.
Mixing height.......9500 ft AGL until 1900. 500 ft AGL after 2000.
Transport winds.....West 12 to 14 mph until 2100, then northeast around
10 mph until 2300, then east 9 to 13 mph
until 0300, then southeast around 12 mph.
Smoke dispersal.....Very good until 1900, decreasing to Poor after 2100.
TIME (MDT) 12P 1PM 2PM 3PM 4PM 5PM 6PM 7PM 8PM 9PM 10P 11P
Sky (%).........15 25 20 10 15 5 5 0 0 5 5 5
Weather cov.....
Weather type....
Tstm cov........
CWR.............0 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 0
Chc of thdr (%).0 0 0 0 0 0 0 0 0 0 0 0
Temp............71 69 66 62 59 56 54 53 52 52 51 50
RH..............23 25 30 32 35 38 40 41 42 44 45 46
20 FT wind dir..NW NW N N NE E E SE SE SE SE SE
20 FT wind spd..7 6 6 4 5 5 4 6 6 6 6 6
20 FT wind gust.10 10 7 6 6 6 6 10 10 7 7 7
Ridge wind dir..NW NW N N NE E E SE SE SE SE SE
Ridge wind spd..15 15 10 10 10 10 10 15 15 10 10 10
Mix hgt (kft)...9.5 6.0 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5
Transp wind dir.NW W W N NE E E E SE SE SE SE
Transp wind spd.14 13 12 9 10 10 9 13 13 12 12 12
SDspl kt-ft/1000117 68 7 3 4 4 3 4 4 4 4 4
.TUESDAY...
Sky/weather.........Mostly sunny (25-35 percent). Slight chance of
showers and thunderstorms in the afternoon.
CWR.................0 percent.
Chance of pcpn......20 percent.
Chance of thunder...19 percent.
Max temperature.....Around 81.
Min humidity........19 percent.
Wind (20 ft)........Light winds until 1400, then west around 7 mph
with gusts to around 12 mph until 1700, then north
around 9 mph with gusts to around 14 mph. Gusty
and erratic winds expected near thunderstorms
in the afternoon.
Ridgetop wind.......South 10 to 15 mph until 1200. North after
1700.
Mixing height.......500 ft AGL until 0900, then gradually increasing
to 12000 ft AGL by 1300 until 1500,
then 9500 ft AGL until 1700, then 7000 ft AGL.
Transport winds.....Southeast 9 to 13 mph until 1000, then west 10
to 16 mph.
Smoke dispersal.....Poor until 0900. Good early in the morning
increasing to very good in the afternoon after
1300.
TIME (MDT) MID 1AM 2AM 3AM 4AM 5AM 6AM 7AM 8AM 9AM 10A 11A
Sky (%).........5 5 5 15 25 40 45 40 40 50 45 40
Weather cov..... SCH SCH SCH SCH SCH
Weather type.... RW RW RW RW RW
Tstm cov........ SCH SCH SCH SCH SCH
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
Chc of pcpn (%).0 0 0 0 0 0 10 10 20 10 20 20
Chc of thdr (%).0 0 0 0 0 0 10 10 20 10 20 20
Temp............52 54 59 65 71 76 79 80 80 79 78 75
RH..............45 43 39 34 28 24 21 20 19 20 21 23
20 FT wind dir..SE SE SE S SW SW SW W W W W N
20 FT wind spd..6 6 4 4 4 5 6 6 7 6 8 9
20 FT wind gust.7 10 6 6 6 7 8 10 12 10 13 14
Ridge wind dir..SE SE SE S SW SW SW W W W W N
Ridge wind spd..10 15 10 10 10 10 10 15 15 10 15 15
Mix hgt (kft)...0.5 0.5 0.5 2.5 6.0 8.5 11 12 12 9.5 9.0 7.0
Transp wind dir.SE SE SE S W W W W W SW W W
Transp wind spd.12 13 9 9 10 12 13 13 14 12 15 16
SDspl kt-ft/10004 4 5 20 52 87 122 133 136 93 114 98
.FORECAST DAYS 3 THROUGH 5...
.WEDNESDAY...
Partly cloudy. Chance of showers and slight chance of
thunderstorms. Lows in the mid 50s. Highs in the mid 70s. Light
winds.
.THURSDAY...
Mostly cloudy with showers likely and chance of thunderstorms.
Lows in the mid 50s. Highs in the upper 60s. Light winds.
.INDEPENDENCE DAY...
Mostly cloudy. Chance of showers and thunderstorms. Lows around
50. Highs in the upper 60s. Light winds.
$$
Forecaster...Rowe
Requested by...IC
Type of request...WILDFIRE
.TAG 2516775.4/RIW
.DELDT 06/30/25
.FormatterVersion 2.0.0
.EMAIL michael.mcewen@usda.gov