Suppression Forecast
Issued by NWS Riverton, WY
Issued by NWS Riverton, WY
994
FNUS75 KRIW 011210
FWSRIW
Spot Forecast for Porqupine...USFS
National Weather Service Riverton WY
610 AM MDT Tue Jul 1 2025
Forecast is based on forecast start time of 0700 MDT on July 01.
If conditions become unrepresentative, contact the National Weather
Service
.DISCUSSION...
Increasing clouds this afternoon with minimal storm chances after
2PM (<10-15%) through sunset. Winds will increase after noon with
gusts up to 15-20 mph out of the southwest before decreasing below
10 mph after sunset and overnight into Wednesday. Smoke dispersal
will improve late this morning and especially in the afternoon
with the increased winds. Afternoon high temperatures into the
upper 70s with minimum relative humidity values down to near 20
percent before recovering overnight as temperatures drop to near
50.
Similar temperatures and conditions Wednesday but with
increased thunderstorm chances becoming more scattered by
afternoon and evening (20-30%).
...Thunderstorms imply strong gusty and erratic winds...
.TODAY...
Sky/weather.........Sunny (20-30 percent).
CWR.................0 percent.
Chance of pcpn......10 percent.
Chance of thunder...13 percent.
Max temperature.....Around 78.
Min humidity........20 percent.
Wind (20 ft)........Light winds until 1700, then northwest around 7
mph with gusts to around 12 mph. Gusty and
erratic winds expected near thunderstorms late
in the afternoon.
Ridgetop wind.......South around 10 mph until 1200. Northwest after
1700.
Mixing height.......2000 ft AGL until 1000, then 6500 ft AGL until
1100, then 11000 ft AGL until 1300, then 13000
ft AGL until 1700, then 10500 ft AGL.
Transport winds.....South 8 to 10 mph until 1000, then west 10 to
14 mph.
Smoke dispersal.....Poor until 0900. Very good early in the morning
increasing to excellent in the afternoon after
1100.
TIME (MDT) 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........10 15 20 20 20 25 25 30 35 35 35
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
Chc of pcpn (%).0 0 0 0 0 10 10 10 10 10 10
Chc of thdr (%).0 0 0 0 0 10 10 10 10 10 10
Temp............55 59 64 68 73 77 77 78 78 77 75
RH..............40 38 36 32 27 23 22 21 20 21 23
20 FT wind dir..SE SE S SW SW SW SW W W SW NW
20 FT wind spd..5 3 4 5 6 6 6 6 6 5 7
20 FT wind gust.6 5 6 7 8 10 8 8 8 7 12
Ridge wind dir..SE SE S SW SW SW SW W W SW NW
Ridge wind spd..10 10 10 10 10 10 10 10 10 10 15
Mix hgt (kft)...0.5 0.5 2.0 6.5 10 11 13 13 13 12 11
Transp wind dir.SE S S SW W W W W W W W
Transp wind spd.10 8 9 10 13 14 14 13 12 12 14
SDspl kt-ft/10004 4 17 60 108 135 155 137 125 120 127
.TONIGHT...
Sky/weather.........Partly cloudy (30-40 percent).
CWR.................0 percent.
Chance of pcpn......10 percent.
Chance of thunder...9 percent.
Min temperature.....Around 51.
Max humidity........48 percent.
Wind (20 ft)........Light winds.
Ridgetop wind.......Light winds until 1900, then east 10 to 15 mph.
Mixing height.......5500 ft AGL until 1900. 500 ft AGL after 2000.
Transport winds.....West around 10 mph until 1900, then southeast
12 to 13 mph until 2300, then east around 9 mph
until 2400, then southeast 10 to 12 mph.
Smoke dispersal.....Fair until 1900. Poor after 2000.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........35 35 35 35 35 35 30 35 35 35 35 35
Weather cov.....
Weather type....
Tstm cov........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
Chc of pcpn (%).10 10 10 0 0 0 0 0 0 0 0 0
Chc of thdr (%).10 10 10 0 0 0 0 0 0 0 0 0
Temp............74 70 66 62 59 57 54 53 53 53 52 52
RH..............25 29 34 38 40 43 45 45 45 44 45 47
20 FT wind dir..NW SE E E E E E E E SE SE SE
20 FT wind spd..1 6 6 6 6 4 6 6 6 5 6 6
20 FT wind gust. 10 10 8 10 6 8 10 8 7 8 8
Ridge wind dir..NW SE E E E E E E E SE SE SE
Ridge wind spd..5 10 10 10 15 10 10 10 10 10 10 10
Mix hgt (kft)...5.5 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 SE E E SE E SE SE S S S SE
Transp wind spd.10 12 12 12 13 9 12 12 12 10 12 12
SDspl kt-ft/100051 24 3 4 4 3 4 4 4 4 4 4
.WEDNESDAY...
Sky/weather.........Mostly sunny (45-55 percent) then becoming
mostly cloudy (65-75 percent). Slight chance of
rain showers late in the morning. Slight chance
of thunderstorms early in the afternoon, then
chance of showers and thunderstorms in the
afternoon.
CWR.................2 percent.
Chance of pcpn......30 percent.
Chance of thunder...27 percent.
Max temperature.....Around 74.
Min humidity........29 percent.
Wind (20 ft)........Light winds. Gusty and erratic winds expected
near thunderstorms in the afternoon.
Ridgetop wind.......South around 10 mph until 1100. Northwest after
1600.
Mixing height.......1000 ft AGL until 0900, then 4000 ft AGL until
1100, then 6500 ft AGL until 1200, then 8500 ft
AGL until 1600, then 6000 ft AGL until 1700,
then 4000 ft AGL.
Transport winds.....Southeast around 12 mph until 0800, then
southwest 10 to 12 mph.
Smoke dispersal.....Poor until 0900. Fair early in the morning
increasing to good in the afternoon after 1300.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........35 35 30 30 35 40 45 50 55 60 65 70
Weather cov..... SCH SCH CHC CHC CHC CHC CHC
Weather type.... RW RW RW RW RW RW RW
Tstm cov........ SCH CHC CHC CHC CHC CHC
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
Chc of pcpn (%).0 0 0 0 10 20 20 30 30 30 30 30
Chc of thdr (%).0 0 0 0 10 10 20 30 30 30 30 30
Temp............51 55 59 64 67 70 74 74 73 73 71 68
RH..............48 46 45 44 39 35 31 30 30 29 32 35
20 FT wind dir..SE SE S S S SW SW W W W NW NW
20 FT wind spd..6 6 5 5 5 5 5 6 6 6 6 6
20 FT wind gust.8 7 7 7 7 7 7 8 8 10 8 7
Ridge wind dir..SE SE S S S SW SW W W W NW NW
Ridge wind spd..10 10 10 10 10 10 10 10 10 10 10 10
Mix hgt (kft)...0.5 0.5 1.0 2.5 4.0 6.5 8.5 8.0 8.0 7.5 6.0 4.0
Transp wind dir.SE SE S S SW SW SW SW SW SW SW SW
Transp wind spd.12 12 10 10 10 10 10 12 12 12 12 12
SDspl kt-ft/10004 4 7 21 38 57 76 81 78 74 58 42
.FORECAST DAYS 3 THROUGH 5...
.THURSDAY...
Mostly cloudy with showers likely and chance of thunderstorms.
Lows in the mid 50s. Highs in the upper 60s. Light winds.
.INDEPENDENCE DAY...
Partly cloudy. Chance of showers and thunderstorms. Lows around
50. Highs in the upper 60s. Light winds.
.SATURDAY...
Mostly clear. Slight chance of showers and thunderstorms. Lows in
the upper 40s. Highs around 70. Light winds.
$$
Forecaster...Lowe
Requested by...IC
Type of request...WILDFIRE
.TAG 2516775.5/RIW
.DELDT 07/01/25
.FormatterVersion 2.0.0
.EMAIL michael.mcewen@usda.gov