651
FNUS75 KRIW 121331
FWSRIW

Spot Forecast for Yellowtail RX...BLM
National Weather Service Riverton WY
731 AM MDT Wed Mar 12 2025

Forecast is based on ignition time of 0714 MST on March 12.
If conditions become unrepresentative, contact the National Weather
Service

.DISCUSSION...

Warm and dry conditions continue today. Wind will remain light
through the morning before increasing out of the south after 1200.
Gust of 15 to 20 mph are expected through the afternoon before
decreasing after sunset. Humidity will fall into the 20 to 30
percent range. A system will on Thursday, bringing gusty southerly
winds and shower chances late in the day.

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

.REST OF TODAY...

Sky/weather.........Mostly sunny (30-40 percent) then becoming
                    mostly cloudy (65-75 percent) after 1500.
CWR.................0 percent.
Chance of pcpn......0 percent.
Max temperature.....Around 64.
Min humidity........22 percent.
Wind (20 ft)........Light winds until 1100, then south 8 to 13 mph
                    with gusts to around 19 mph until 1700, then
                    southwest around 10 mph with gusts to around 16
                    mph.
Mixing height.......2000 ft AGL until 1200. 7000 ft AGL after 1400.
Transport winds.....Southeast 9 to 18 mph until 1300, then south 18
                    to 21 mph.
Smoke dispersal.....Poor until 1000, increasing through the day,
                    becoming very good in the afternoon after 1600.

TIME (MST)      7 AM   9 AM   11 AM  1 PM   3 PM
Sky (%).........15     15     10     20     60
Weather cov.....
Weather type....NONE   NONE   NONE   NONE   NONE
Tstm cov........
CWR.............0      0      0      0      0
Chc of pcpn (%).0      0      0      0      0
Temp............34     46     54     60     63
RH..............78     65     55     37     25
20 ft wind......SE 2   SE 6   SE 11  S 13   S 12
20 ft wind gust.       8      17     19     18
Mix hgt (ft)....1000   1500   3000   5500   7000
Transport wind..SE 10  S 14   S 18   S 21   S 20
SDspl kt-ft/10007      19     45     96     116

.TONIGHT...

Sky/weather.........Mostly cloudy (70-80 percent).
CWR.................0 percent.
Chance of pcpn......0 percent.
Min temperature.....Around 35.
Max humidity........72 percent.
Wind (20 ft)........Southwest winds 7 to 9 mph with gusts to around
                    14 mph until 2000, then light until 0200, then
                    south 7 to 9 mph with gusts to around 14 mph.
Mixing height.......1000 ft AGL.
Transport winds.....South 12 to 16 mph.
Smoke dispersal.....Poor.

TIME (MST)      5 PM   7 PM   9 PM   11 PM  1 AM   3 AM
Sky (%).........85     60     50     35     35     35
Weather cov.....
Weather type....NONE   NONE   NONE   NONE   NONE   NONE
Tstm cov........
CWR.............0      0      0      0      0      0
Chc of pcpn (%).0      0      0      0      0      0
Temp............62     53     47     43     39     37
RH..............35     52     59     64     66     70
20 ft wind......SW 9   S 6    S 5    S 5    S 7    S 9
20 ft wind gust.14     8      7      7      11     14
Mix hgt (ft)....1500   1000   1000   1000   1000   1000
Transport wind..S 16   SW 12  S 12   S 12   S 14   S 16
SDspl kt-ft/100022     8      8      8      9      11

.THURSDAY...

Sky/weather.........Mostly sunny (35-45 percent) then becoming
                    mostly cloudy (65-75 percent).
CWR.................0 percent.
Chance of pcpn......10 percent.
Max temperature.....Around 62.
Min humidity........35 percent.
Wind (20 ft)........South winds 9 to 17 mph. Gusts up to 26 mph
                    increasing to 33 mph late in the morning, then
                    decreasing to 21 mph late in the afternoon.
Mixing height.......2500 ft AGL until 1300, increasing to 8000 ft
                    AGL by 1500, then decreasing to 4000 ft AGL
                    after 1700.
Transport winds.....South 16 to 24 mph until 1200, then 18 to 26
                    mph.
Smoke dispersal.....Poor until 1100, then increasing to very good
                    through 1500, increasing to excellent until
                    1700, then good.

TIME (MST)      5 AM   7 AM   9 AM   11 AM  1 PM   3 PM
Sky (%).........35     30     20     20     40     60
Weather cov.....
Weather type....NONE   NONE   NONE   NONE   NONE   NONE
Tstm cov........
CWR.............0      0      0      0      0      0
Chc of pcpn (%).0      0      0      10     10     10
Temp............35     36     45     54     59     62
RH..............72     72     60     48     40     35
20 ft wind......S 9    S 10   S 14   S 17   S 14   S 11
20 ft wind gust.14     16     21     26     21     17
Mix hgt (ft)....1000   1000   1500   2500   6000   6000
Transport wind..S 16   S 17   S 22   S 26   S 22   S 20
SDspl kt-ft/100011     13     30     57     116    101

.FORECAST DAYS 3 THROUGH 5...
.FRIDAY...
Colder. Mostly cloudy with rain and snow. Lows in the upper 20s.
Highs in the mid 40s. North winds around 13 mph.
.SATURDAY...
Mostly cloudy. Lows in the lower 20s. Highs in the mid 40s. Light
winds.
.SUNDAY...
Partly cloudy. Lows in the lower 20s. Highs in the lower 50s.
South winds around 9 mph.

$$
Forecaster...Hensley
Requested by...Shawn Gettings
Type of request...PRESCRIBED
.TAG 2505577.2/RIW
.DELDT 03/12/25
.FormatterVersion 2.0.0
.EMAIL sgettings@blm.gov