Suppression Forecast
Issued by NWS Riverton, WY
Issued by NWS Riverton, WY
163
FNUS75 KRIW 281127
FWSRIW
Spot Forecast for Porqupine...USFS
National Weather Service Riverton WY
527 AM MDT Sat Jun 28 2025
Forecast is based on forecast start time of 0700 MDT on June 28.
If conditions become unrepresentative, contact the National Weather
Service
.DISCUSSION...
Conditions should be fairly similar to yesterday with wind starting
off light and terrain drive become becoming west between 10 and 11 am
after morning inversions break. Temperatures will be similar
to yesterday with humidity between 3 to 5 percent higher in the
afternoon. A stray afternoon shower or thunderstorm can`t be completely
ruled out, but the chance is less than 1 out of 10. Wind should be
similar to yesterday. Mainly dry weather is expected tomorrow with
slight less wind. Dry weather is expected to continue through Tuesday
before increasing moisture brings a chance of thunderstorms on
Wednesday.
...Thunderstorms imply strong gusty and erratic winds...
.REST OF TODAY...
Sky/weather.........Mostly sunny (15-25 percent).
CWR.................0 percent.
Chance of pcpn......10 percent.
Chance of thunder...2 percent.
Max temperature.....Around 73.
Min humidity........26 percent.
Wind (20 ft)........Light winds until 1100, then west 9 to 13 mph
with gusts to around 20 mph.
Ridgetop wind.......Northeast around 10 mph until 0800, then
northwest 10 to 15 mph until 1200, then
west around 20 mph.
Mixing height.......500 ft AGL until 0900. 9000 ft AGL after 1200.
Transport winds.....Northeast around 9 mph until 0800, then west
increasing to 18 to 23 mph.
Smoke dispersal.....Poor until 0900. Excellent after 1400.
TIME (MDT) 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........25 25 20 15 10 10 15 15 20 25 20
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 10 10 10 10
Chc of thdr (%).0 0 0 0 0 0 0 0 0 0 0
Temp............48 55 61 65 68 70 72 73 73 73 73
RH..............54 49 41 35 32 31 29 28 28 26 26
20 FT wind dir..NE NW NW NW W W W W W W W
20 FT wind spd..4 3 4 6 7 8 10 11 13 13 13
20 FT wind gust.6 6 8 11 13 14 17 20 20 20
Ridge wind dir..NE NW NW NW NW W W W W W W
Ridge wind spd..10 10 10 10 15 15 15 20 20 20 20
Mix hgt (kft)...0.5 0.5 2.5 4.5 6.0 7.5 8.5 9.0 9.0 9.0 8.5
Transp wind dir.NE NW W W W W W W W W W
Transp wind spd.9 8 9 12 14 18 21 23 23 23 22
SDspl kt-ft/10003 5 21 43 72 120 152 177 180 178 164
.TONIGHT...
Sky/weather.........Mostly clear (5-15 percent).
CWR.................0 percent.
Chance of pcpn......5 percent.
Chance of thunder...1 percent.
Min temperature.....Around 49.
Max humidity........50 percent.
Wind (20 ft)........Northwest winds 8 to 12 mph with gusts to
around 18 mph until 2100, then light.
Ridgetop wind.......Northwest 15 to 20 mph until 2200, then north
around 10 mph.
Mixing height.......8000 ft AGL until 1900. 500 ft AGL after 2000.
Transport winds.....West 13 to 22 mph until 2200, then north to
northwest 8 to 10 mph.
Smoke dispersal.....Excellent early in the evening decreasing to
very good late in the night until 2000, then
poor.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........10 10 10 10 10 10 10 10 5 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 (%).5 5 5 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 68 65 62 58 56 55 55 54 52 51 50
RH..............28 31 37 42 44 46 48 46 49 50 48 50
20 FT wind dir..W W NW NW NW NW N NW NE NE NE NE
20 FT wind spd..12 10 8 6 5 5 3 3 3 3 3 4
20 FT wind gust.18 16 13 10 7 7 6
Ridge wind dir..W W NW NW NW NW N NW NE NE NE NE
Ridge wind spd..20 15 15 15 10 10 10 10 10 10 10 10
Mix hgt (kft)...8.0 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.W W W NW NW NW NW NW NW NW N N
Transp wind spd.22 20 15 13 10 10 8 8 8 8 8 9
SDspl kt-ft/1000150 102 8 4 4 4 3 3 3 3 3 3
.SUNDAY...
Sky/weather.........Sunny (5-15 percent).
CWR.................0 percent.
Chance of pcpn......0 percent.
Chance of thunder...0 percent.
Max temperature.....Around 72.
Min humidity........21 percent.
Wind (20 ft)........Light winds until 1200, then west 7 to 9 mph
with gusts to around 14 mph.
Ridgetop wind.......Southeast around 10 mph until 0800, then west
until 1400, then around 15 mph.
Mixing height.......2000 ft AGL until 1000. 8000 ft AGL after 1200.
Transport winds.....South 8 to 9 mph until 0900, then west increasing
to 20 to 22 mph.
Smoke dispersal.....Poor until 0900. Very good after 1200.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........10 5 5 5 5 5 5 5 10 10 10 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............49 53 56 59 64 67 69 70 72 72 72 71
RH..............49 43 41 37 31 28 26 24 22 21 21 22
20 FT wind dir..E SE SW W W W W W W W W NW
20 FT wind spd..3 4 4 5 6 6 7 8 9 9 9 9
20 FT wind gust. 6 6 7 8 10 11 13 14 14 14 14
Ridge wind dir..E SE SW W W W W W W W W NW
Ridge wind spd..10 10 10 10 10 15 15 15 15 15 15 15
Mix hgt (kft)...0.5 0.5 1.0 2.0 3.5 5.0 7.0 7.0 7.5 8.0 7.5 7.0
Transp wind dir.S S SW W W W W W W W W NW
Transp wind spd.8 9 9 10 14 17 21 21 22 22 21 20
SDspl kt-ft/10003 3 9 18 43 77 122 129 143 150 135 120
.FORECAST DAYS 3 THROUGH 5...
.MONDAY...
Mostly clear. Lows in the upper 40s. Highs in the mid 70s. Light
winds.
.TUESDAY...
Mostly clear. Lows in the mid 50s. Highs in the upper 70s. Light
winds.
.WEDNESDAY...
Partly cloudy. Slight chance of showers and thunderstorms. Lows
in the mid 50s. Highs in the mid 70s. Light winds.
$$
Forecaster...Hattings
Requested by...IC
Type of request...WILDFIRE
.TAG 2516775.1/RIW
.DELDT 06/28/25
.FormatterVersion 2.0.0
.EMAIL michael.mcewen@usda.gov