240
FNUS75 KRIW 031121
FWSRIW

Spot Forecast for Rock Tunp RX...BLM
National Weather Service Riverton WY
521 AM MDT Tue Jun 3 2025

Forecast is based on ignition time of 0700 MDT on June 03.
If conditions become unrepresentative, contact the National Weather
Service

.DISCUSSION...

Cool and mostly cloudy but remaining dry. West to northwesterly
winds with gusts up to 20 mph in the afternoon hours. With
temperatures struggling to reach the mid 50s, relative humidity
values will remain above the 35 percent mark in the afternoon.
Winds become light once again towards sunset this evening with
clouds lingering through the overnight.

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

.REST OF TODAY...

Sky/weather.........Mostly sunny (25-35 percent).
Chance of pcpn......10 percent.
Chance of thunder...11 percent.
Max temperature.....Around 57.
Min humidity........36 percent.
Wind (20 ft)........Light winds until 0800, then southeast around 8
                    mph until 0900, then light until 1200, then
                    northwest 7 to 15 mph with gusts to around 20
                    mph.
Mixing height.......1500 ft AGL until 0900. 8500 ft AGL after 1300.
Transport winds.....Southeast 13 to 15 mph until 1000, then
                    southwest around 12 mph until 1100, then west
                    13 to 20 mph until 1500, then 22 to 23 mph.
Smoke dispersal.....Poor until 0800. Very good early in the morning
                    increasing to excellent in the afternoon after
                    1400.

TIME (MDT)      7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........25  20  15  20  20  20  35  30  35  40  40
Weather cov.....
Weather type....
Tstm cov........
Chc of pcpn (%).10  0   0   0   0   0   0   10  0   10  0
Chc of thdr (%).0   0   0   0   0   0   0   10  0   10  0
Temp............43  43  46  49  50  53  55  56  54  55  56
RH..............68  72  58  54  50  41  39  37  43  40  39
20 FT wind dir..E   SE  SE  SW  W   W   NW  W   NW  W   NW
20 FT wind spd..6   8   6   6   6   8   10  12  15  15  14
20 FT wind gust.10  12  10  7   10  12  14  17  20  20  19
Mix hgt (kft)...0.5 1.5 2.5 4.0 5.5 7.0 7.5 8.0 8.5 8.5 8.0
Transp wind dir.E   SE  SE  SW  W   W   W   W   W   W   W
Transp wind spd.15  15  13  12  13  15  17  20  23  23  22
SDspl kt-ft/10009   23  29  40  60  89  113 138 174 169 157

.TONIGHT...

Sky/weather.........Mostly clear (20-30 percent).
Chance of pcpn......0 percent.
Chance of thunder...2 percent.
Min temperature.....Around 37.
Max humidity........63 percent.
Wind (20 ft)........Northwest winds 7 to 14 mph with gusts to
                    around 19 mph until 2200, then light.
Mixing height.......8000 ft AGL until 1900.
Transport winds.....Northwest 14 to 22 mph until 2200, then north 8
                    to 12 mph.
Smoke dispersal.....Excellent early in the evening decreasing to
                    very good late in the night until 2000. Poor
                    after 2300.

TIME (MDT)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........25  35  25  25  20  15  10  10  10  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............56  54  52  49  46  44  43  41  40  39  39  38
RH..............36  39  40  46  53  55  50  58  62  55  63  63
20 FT wind dir..NW  NW  NW  NW  N   N   N   NE  NW  NW  NE  NE
20 FT wind spd..14  14  10  7   6   6   5   4   4   3   3   3
20 FT wind gust.19  19  14  10  7   7   6   6   6   4   4   4
Mix hgt (kft)...8.0 6.0 3.0 1.0 0.5 0.5 0.1 0.1 0.1 0.1 0.1 0.1
Transp wind dir.W   NW  NW  NW  N   N   N   N   N   N   N   N
Transp wind spd.22  22  17  14  12  12  10  9   9   8   8   8
SDspl kt-ft/1000153 115 54  15  8   4   2   1   1   1   1   1

.WEDNESDAY...

Sky/weather.........Sunny (5-15 percent).
Chance of pcpn......0 percent.
Chance of thunder...2 percent.
Max temperature.....Around 62.
Min humidity........27 percent.
Wind (20 ft)........Light winds until 1300, then west around 7 mph
                    until 1400, then light until 1600, then
                    northwest 7 to 9 mph.
Mixing height.......8000 ft AGL after 1200.
Transport winds.....Northeast around 9 mph until 0800, then east
                    around 13 mph until 0900, then southwest until
                    1700, then west around 16 mph.
Smoke dispersal.....Poor until 0800. Good early in the morning
                    increasing to very good in the afternoon after
                    1300.

TIME (MDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........10  15  10  5   5   5   5   5   10  10  15  15
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............37  40  45  49  52  54  55  58  59  60  61  62
RH..............58  59  51  43  38  34  33  31  30  29  27  28
20 FT wind dir..N   E   E   S   SW  W   W   W   W   W   NW  NW
20 FT wind spd..4   4   6   3   5   6   6   7   6   6   8   9
20 FT wind gust.6   5   10  4   6   8   7   10  10  10  12  13
Mix hgt (kft)...0.1 0.5 1.5 2.0 3.5 5.0 6.5 7.0 7.5 7.5 8.0 8.0
Transp wind dir.NE  NE  E   S   SW  SW  SW  SW  SW  SW  SW  W
Transp wind spd.9   9   13  8   10  12  12  14  13  13  15  16
SDspl kt-ft/10002   6   17  17  35  53  67  85  82  87  101 111

.FORECAST DAYS 3 THROUGH 5...
.THURSDAY...
Mostly clear. Lows in the upper 30s. Highs in the mid 60s. Light
winds.
.FRIDAY...
Mostly clear. Slight chance of showers. Lows around 40. Highs in
the mid 60s. Light winds.
.SATURDAY...
Mostly clear. Lows in the lower 40s. Highs in the lower 70s.
Light winds.

$$
Forecaster...Lowe
Requested by...Phillip Lockwood
Type of request...PRESCRIBED
.TAG 2514700.8/RIW
.DELDT 06/03/25
.FormatterVersion 2.0.0
.EMAIL plockwood@blm.gov