612
FNUS75 KRIW 021204
FWSRIW

Spot Forecast for Horse Fire...USFS
National Weather Service Riverton WY
604 AM MDT Sat Aug 2 2025

Forecast is based on forecast start time of 0700 MDT on August 02.
If conditions become unrepresentative, contact the National Weather
Service

.DISCUSSION...

Mostly clear skies early will trend to mostly cloudy by 1300.
Showers and thunderstorms will be more likely this afternoon, but
chances for wetting rainfall remain low (under 10%). Any showers
could produce variably gusty winds as they pass. Increased
chances for rainfall will keep humidity levels above 25 percent
through the afternoon. Winds will increase during the afternoon,
with a few gusts above 20 mph between 1400 and 1800.

Drier air begins to move into the region on Sunday, leading to
much lower chances for rainfall, lower humidity levels, and more
frequent wind gusts above 20 mph.

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

.REST OF TODAY...

Sky/weather.........Mostly sunny (30-40 percent) then becoming
                    mostly cloudy (70-80 percent). Scattered
                    showers and  thunderstorms late in the
                    afternoon.
CWR.................7 percent.
Chance of pcpn......40 percent.
Chance of thunder...22 percent.
Max temperature.....Around 69.
Min humidity........25 percent.
Wind (20 ft)........Light winds until 1300, then west 7 to 9 mph
                    with gusts to around 17 mph. Gusty and erratic
                    winds expected near thunderstorms late in the
                    afternoon.
Ridgetop wind.......Southwest 10 to 15 mph until 1700, then
                    northwest.
Mixing height.......1500 ft AGL until 1000, then 8500 ft.
Transport winds.....South 8 to 10 mph until 1200. Northwest around
                    16 mph after 1700.
Smoke dispersal.....Poor until 1000. increasing to very good after
                    1200.

TIME (MDT)      7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........40  20  35  25  35  45  80  80  85  65  75
Weather cov.....                    ISO ISO SCT SCT SCT SCT
Weather type....                    RW  RW  RW  RW  RW  RW
Tstm cov........                            ISO ISO ISO ISO
CWR.............0   0   0   0   0   10  10  10  10  10  10
Chc of pcpn (%).0   0   0   0   10  20  20  30  40  30  30
Chc of thdr (%).0   0   0   0   0   0   0   10  20  20  20
Temp............47  51  59  64  67  68  67  64  65  65  63
RH..............45  44  36  30  27  25  28  32  33  33  35
20 FT wind dir..SW  S   SE  S   W   W   W   W   W   W   NW
20 FT wind spd..4   3   4   4   5   6   7   8   8   9   9
20 FT wind gust.6   6   7   10  10  13  14  16  17  17  17
Ridge wind dir..SW  S   SE  S   W   W   W   W   W   W   NW
Ridge wind spd..10  10  10  10  10  15  15  15  15  15  15
Mix hgt (kft)...0.5 0.5 1.5 4.5 8.5 12  10  7.5 7.5 6.5 5.5
Transp wind dir.S   S   S   S   SW  SW  W   SW  SW  W   NW
Transp wind spd.9   8   9   9   10  13  14  15  15  16  16
SDspl kt-ft/10005   4   12  36  79  125 117 98  95  92  78

.TONIGHT...

Sky/weather.........Mostly cloudy (55-65 percent) then becoming
                    partly cloudy (25-35 percent). Isolated showers
                    and thunderstorms early in the evening.
CWR.................0 percent.
Chance of pcpn......20 percent.
Chance of thunder...10 percent.
Min temperature.....Around 45.
Max humidity........52 percent.
Wind (20 ft)........Northwest winds 7 to 9 mph with gusts to around
                    16 mph until 2000, then light. Gusty and
                    erratic winds expected near thunderstorms early
                    in the evening. Gusty and erratic winds
                    expected near thunderstorms early in the
                    evening.
Ridgetop wind.......West 10 to 15 mph.
Mixing height.......2500 ft AGL until 2000, then 500 ft AGL.
Transport winds.....West 13 to 16 mph until 2100, then 12 to 13
                    mph.
Smoke dispersal.....Fair until 1900. Poor after 2000.

TIME (MDT)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........60  55  45  40  45  25  20  25  15  15  15  10
Weather cov.....ISO     ISO
Weather type....RW      RW
Tstm cov........ISO     ISO
CWR.............0   0   0   0   0   0   0   0   0   0   0   0
Chc of pcpn (%).20  10  10  10  10  10  0   0   0   0   0   0
Chc of thdr (%).10  10  10  0   0   0   0   0   0   0   0   0
Temp............60  59  58  56  53  51  49  49  48  47  47  46
RH..............42  44  45  49  50  50  52  50  51  51  51  51
20 FT wind dir..NW  NW  W   W   W   W   W   W   W   W   W   W
20 FT wind spd..9   7   6   6   6   6   6   6   6   6   6   6
20 FT wind gust.16  14  14  13  12  11  11  10  10  10  8   8
Ridge wind dir..NW  NW  W   W   W   W   W   W   W   W   W   W
Ridge wind spd..15  15  15  15  15  15  15  10  10  10  10  10
Mix hgt (kft)...3.0 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.SW  W   W   NW  W   W   W   W   W   W   W   W
Transp wind spd.16  14  13  13  13  13  13  12  12  12  12  12
SDspl kt-ft/100045  28  7   6   6   6   6   6   6   6   6   6

.SUNDAY...

Sky/weather.........Sunny (0-10 percent).
Chance of pcpn......0 percent.
Chance of thunder...2 percent.
Max temperature.....Around 70.
Min humidity........24 percent.
Wind (20 ft)........Light winds until 1200, then west 8 to 10 mph
                    with gusts to around 18 mph.
Mixing height.......1000 ft AGL until 0900. 9500 ft AGL after 1200.
Transport winds.....West 9 to 17 mph.
Smoke dispersal.....Poor until 0900. Very good after 1400.

TIME (MDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........10  10  5   5   0   0   5   5   5   10  10  10
Weather cov.....
Weather type....
Tstm cov........
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............46  49  53  57  60  62  65  66  68  69  68  67
RH..............51  46  46  42  37  33  29  27  25  24  25  25
20 FT wind dir..W   W   W   W   W   W   W   W   W   W   W   W
20 FT wind spd..6   5   4   4   5   6   8   9   9   10  10  10
20 FT wind gust.8   7   7   8   11  14  17  18  18  18  18  18
Mix hgt (kft)...0.5 0.5 1.0 2.5 5.0 6.5 8.0 8.5 9.0 9.5 9.0 9.0
Transp wind dir.W   W   W   W   W   W   W   W   W   W   W   W
Transp wind spd.12  10  9   10  13  14  15  16  16  17  17  17
SDspl kt-ft/10006   5   7   25  57  79  104 119 125 141 138 134

.FORECAST DAYS 3 THROUGH 5...
.MONDAY...
Mostly clear. Lows in the upper 40s. Highs in the mid 70s. South
winds around 7 mph.
.TUESDAY...
Mostly clear. Lows in the mid 40s. Highs around 70. West winds
around 8 mph.
.WEDNESDAY...
Mostly clear. Lows in the upper 40s. Highs in the mid 70s.
Southwest winds around 7 mph.

$$
Forecaster...Straub
Requested by...Aaron Baechle
Type of request...WILDFIRE
.TAG 2518772.4/RIW
.DELDT 08/02/25
.FormatterVersion 2.0.0
.EMAIL aaronbaechle@gmail.com