107
FNUS75 KRIW 030257
FWSRIW

Spot Forecast for Dry Vee Fire...Powder River Fire District
National Weather Service Riverton WY
857 PM MDT Sat Aug 2 2025

Forecast is based on forecast start time of 2100 MDT on August 02.
If conditions become unrepresentative, contact the National Weather
Service

.DISCUSSION...

Very light showers is ongoing over the site currently, but will
be ending by 2200. Winds will generally stay light (10 mph or
less) with partly cloudy skies through the rest of the night.
Skies will be clear by mid-morning Sunday (around 0900), with
clouds developing over the area by 1400. There is a 30% chance for
a shower or thunderstorm between 1300 and 1800. Winds are expected
to by 20 mph or less through the day.

...Thunderstorms imply strong gusty and erratic winds...

.REST OF TONIGHT...

Sky/weather.........Mostly cloudy (60-70 percent) then becoming
                    partly cloudy (25-35 percent).
CWR.................1 percent.
Chance of pcpn......10 percent.
Chance of thunder...5 percent.
Min temperature.....Around 54.
Max humidity........77 percent.
Wind (20 ft)........North winds around 9 mph until 2200, then
                    northwest 8 to 11 mph.
Ridgetop wind.......Northwest around 15 mph until 2300, then 15 to
                    20 mph.
Mixing height.......500 ft AGL.
Transport winds.....Northwest 15 to 18 mph.
Smoke dispersal.....Poor.

TIME (MDT)      9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........75  55  55  30  35  40  20  25  15
Weather cov.....
Weather type....
Tstm cov........
CWR.............0   0   0   0   0   0   0   0   0
Chc of pcpn (%).10  10  10  10  0   10  10  10  10
Chc of thdr (%).10  10  10  0   0   0   0   0   0
Temp............67  65  63  62  61  60  59  58  57
RH..............38  44  51  52  53  56  59  61  64
20 FT wind dir..N   W   W   NW  NW  NW  W   NW  NW
20 FT wind spd..9   10  8   11  8   9   10  8   8
20 FT wind gust.13  14  12  14  12  13  14  12  12
Ridge wind dir..N   W   W   NW  NW  NW  W   NW  NW
Ridge wind spd..15  15  15  20  15  15  15  15  15
Mix hgt (kft)...0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5
Transp wind dir.N   NW  N   NW  NW  W   W   NW  NW
Transp wind spd.16  17  15  18  15  16  17  15  15
SDspl kt-ft/10008   8   6   8   6   7   8   6   6

.SUNDAY...

Sky/weather.........Sunny (15-25 percent). Scattered showers and
                    thunderstorms early in the afternoon. Isolated
                    showers and thunderstorms late in the
                    afternoon.
CWR.................0 percent increasing to 23 percent in the
                    afternoon.
Chance of pcpn......40 percent.
Chance of thunder...25 percent.
Max temperature.....Around 78.
Min humidity........25 percent.
Wind (20 ft)........Northwest winds around 7 mph until 0700, then
                    light until 1400, then north around 8 mph until
                    1600, then light. Gusty and erratic winds
                    expected near thunderstorms in the afternoon.
Ridgetop wind.......Northwest 10 to 15 mph until 0800, then
                    northeast until 0900, then southeast until
                    1400, then north until 1700, then southeast.
Mixing height.......2000 ft AGL until 1000. 9000 ft AGL after 1300.
Transport winds.....North 10 to 14 mph until 0900, then northeast
                    around 10 mph until 1000, then southwest 10 to
                    13 mph until 1400, then west 12 to 15 mph.
Smoke dispersal.....Poor until 0900. Good increasing to very good
                    in the afternoon after 1500.

TIME (MDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........10  10  20  20  0   0   25  25  35  35  20  15
Weather cov.....                        ISO SCT SCT ISO ISO ISO
Weather type....                        RW  RW  RW  RW  RW  RW
Tstm cov........                        ISO SCT SCT ISO ISO ISO
CWR.............0   0   0   0   0   0   20  20  20  20  20  20
Chc of pcpn (%).0   0   0   0   0   10  10  40  40  20  10  10
Chc of thdr (%).0   0   0   0   0   10  10  30  30  20  10  10
Temp............55  57  62  65  67  70  72  73  69  70  73  76
RH..............66  65  58  53  49  43  38  37  46  45  35  29
20 FT wind dir..NW  NW  NE  SE  SE  SE  S   S   N   NW  N   SE
20 FT wind spd..7   6   5   5   6   6   6   5   8   8   6   6
20 FT wind gust.10  7   6   6   10  7   7   6   12  12  10  7
Ridge wind dir..NW  NW  NE  SE  SE  SE  S   S   N   NW  N   SE
Ridge wind spd..15  10  10  10  15  10  10  10  15  15  15  10
Mix hgt (kft)...0.5 0.5 1.0 2.0 3.0 4.5 6.5 8.5 8.0 9.0 8.5 9.0
Transp wind dir.NW  N   N   NE  S   SW  SW  SW  W   W   W   W
Transp wind spd.14  12  10  10  13  12  12  10  15  15  13  12
SDspl kt-ft/10007   6   10  18  33  44  67  76  104 118 96  89

.SUNDAY NIGHT...

Sky/weather.........Mostly clear (10-20 percent).
CWR.................0 percent.
Chance of pcpn......0 percent.
Chance of thunder...3 percent.
Min temperature.....Around 55.
Max humidity........65 percent.
Wind (20 ft)........Light winds until 1900, then north around 7 mph
                    until 2000, then light until 2100, then north
                    around 7 mph until 2300, then light.
Ridgetop wind.......North 10 to 15 mph until 0400, then northwest.
Mixing height.......8500 ft AGL until 1900. 500 ft AGL after 2000.
Transport winds.....West around 12 mph until 1900, then north 10 to
                    14 mph.
Smoke dispersal.....Good until 1900. Poor after 2000.

TIME (MDT)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........20  10  10  15  15  15  20  15  15  15  15  15
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............77  74  71  68  66  64  61  59  59  59  58  57
RH..............27  33  38  45  50  55  60  64  64  64  65  66
20 FT wind dir..NE  N   N   N   N   N   N   N   N   NW  NW  NW
20 FT wind spd..6   7   6   7   7   6   6   5   5   5   5   5
20 FT wind gust.7   10  10  10  10  10  8   7   6   6   6   6
Ridge wind dir..NE  N   N   N   N   N   N   N   N   NW  NW  NW
Ridge wind spd..10  15  15  15  15  15  10  10  10  10  10  10
Mix hgt (kft)...8.5 4.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5
Transp wind dir.W   N   N   NE  N   NE  NE  N   N   N   N   N
Transp wind spd.12  14  13  14  14  13  12  10  10  10  10  10
SDspl kt-ft/100084  55  8   6   7   6   6   5   5   5   5   5

.FORECAST DAYS 3 THROUGH 5...
.TUESDAY...
Mostly clear. Lows in the upper 50s. Highs in the mid 80s. West
winds around 9 mph.
.WEDNESDAY...
Mostly clear. Lows in the upper 50s. Highs in the upper 80s. West
winds around 8 mph.
.THURSDAY...
Mostly clear. Lows around 60. Highs in the upper 80s. West winds
around 9 mph.

$$
Forecaster...LaVoie
Requested by...Anita Bartlett
Type of request...WILDFIRE
.TAG 2519120.0/RIW
.DELDT 08/02/25
.FormatterVersion 2.0.0
.EMAIL prfd@rtconnect.net