224
FNUS75 KRIW 211501
FWSRIW

Spot Forecast for Trail Creek Piles...USFS
National Weather Service Riverton WY
801 AM MST Thu Nov 21 2024

Forecast is based on ignition time of 1000 MST on November 21.
If conditions become unrepresentative, contact the National Weather
Service

.DISCUSSION...

Skies remain partly to mostly cloudy, with a slight chance of very
light mixed precipitation during the afternoon. Any accumulations
will remain minimal. Winds will be light today, generally from
the south under 5mph. Low mixing heights and light winds will lead
to poor smoke dispersal.

Friday will be similar to today, with light winds, low mixing and
smoke dispersal. Skies will be clearer, with no precipitation
expected.

.REST OF TODAY...

Sky/weather.........Partly sunny (60-70 percent). Slight chance of
                    snow showers.
CWR.................2 percent.
Chance of pcpn......20 percent.
LAL.................1.
Max temperature.....Around 45.
Min humidity........49 percent.
Wind (20 ft)........Light winds.
Ridgetop wind.......Southwest around 10 mph.
Mixing height.......2500 ft AGL.
Transport winds.....South 9 to 14 mph.
Smoke dispersal.....Poor.
Haines Index........2.

TIME (MST)      10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........55  70  65  70  65  60  65  65
Weather cov.....SCH SCH SCH SCH SCH SCH SCH SCH
Weather type....SW  SW  RS  RS  RW  RW  RW  SW
Tstm cov........
CWR.............0   0   0   0   0   0   0   0
Chc of pcpn (%).20  20  20  20  20  20  20  20
LAL.............1   1   1   1   1   1   1   1
Temp............32  37  40  44  45  45  45  41
RH..............63  66  57  49  49  53  54  61
20 FT wind dir..SW  S   S   S   S   SW  SW  SW
20 FT wind spd..3   3   3   4   5   5   4   4
20 FT wind gust.            6   7   7   6   6
Ridge wind dir..SW  S   S   S   S   SW  SW  SW
Ridge wind spd..10  10  10  10  10  10  10  10
Mix hgt (kft)...1.5 2.0 2.0 2.5 2.5 2.0 1.5 1.5
Transp wind dir.S   S   S   S   SW  S   SW  S
Transp wind spd.9   12  13  14  13  12  9   10
Haines index....2   2   2   2   2   2   2   2
SDspl kt-ft/100013  19  23  29  26  20  12  13

.TONIGHT...

Sky/weather.........Mostly cloudy (60-70 percent). Slight chance of
                    snow showers.
CWR.................1 percent.
Chance of pcpn......20 percent.
LAL.................1.
Min temperature.....Around 26.
Max humidity........81 percent.
Wind (20 ft)........Light winds.
Ridgetop wind.......South around 10 mph until 0300, then light
                    until 0500, then south around 10 mph.
Mixing height.......1500 ft AGL.
Transport winds.....South 7 to 12 mph.
Smoke dispersal.....Poor.
Haines Index........2 to 3.

TIME (MST)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........65  70  70  70  70  70  70  65  65  65  65  60
Weather cov.....SCH SCH SCH SCH SCH SCH SCH SCH SCH SCH SCH
Weather type....SW  SW  SW  SW  SW  SW  SW  SW  SW  SW  SW
Tstm cov........
CWR.............0   0   0   0   0   0   0   0   0   0   0   0
Chc of pcpn (%).20  20  20  20  20  20  20  20  20  20  20  10
LAL.............1   1   1   1   1   1   1   1   1   1   1   1
Temp............39  37  37  36  35  34  32  32  31  30  30  30
RH..............67  68  68  73  75  75  76  76  81  79  79  75
20 FT wind dir..SW  SW  S   S   S   S   S   S   S   S   S   S
20 FT wind spd..4   4   6   6   5   4   3   3   3   2   2   3
20 FT wind gust.6   6   8   8   7   6
Ridge wind dir..SW  SW  S   S   S   S   S   S   S   S   S   S
Ridge wind spd..10  10  10  10  10  10  10  10  10  5   5   10
Mix hgt (kft)...1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5
Transp wind dir.S   S   SW  S   S   SW  S   S   S   S   S   S
Transp wind spd.9   9   12  12  10  9   9   8   8   7   7   8
Haines index....2   2   2   2   2   3   3   3   3   3   3   3
SDspl kt-ft/100012  11  14  14  13  11  11  10  10  8   8   10

.FRIDAY...

Sky/weather.........Mostly sunny (45-55 percent).
CWR.................0 percent.
Chance of pcpn......10 percent.
LAL.................1.
Max temperature.....Around 46.
Min humidity........47 percent.
Wind (20 ft)........Light winds.
Ridgetop wind.......Southeast around 10 mph until 0900, then light
                    until 1100, then south around 10 mph until
                    1700, then light.
Mixing height.......2500 ft AGL.
Transport winds.....South 8 to 12 mph.
Smoke dispersal.....Poor.
Haines Index........3.

TIME (MST)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........60  55  50  45  45  40  45  50  55  55  55  55
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  10  10  10  10  10  10  10  10  10
LAL.............1   1   1   1   1   1   1   1   1   1   1   1
Temp............27  26  27  31  35  38  42  45  46  45  41  38
RH..............79  77  79  74  71  69  62  54  48  47  50  53
20 FT wind dir..SE  SE  SE  SE  SE  S   S   S   S   S   S   S
20 FT wind spd..3   3   3   2   2   3   3   4   5   4   3   2
20 FT wind gust.                            6   7   6
Ridge wind dir..SE  SE  SE  SE  SE  S   S   S   S   S   S   S
Ridge wind spd..10  10  10  5   5   10  10  10  10  10  10  5
Mix hgt (kft)...1.5 1.5 1.5 1.5 1.5 2.0 2.0 2.5 2.5 2.0 1.5 1.5
Transp wind dir.S   S   S   S   S   S   S   S   S   S   S   S
Transp wind spd.8   8   8   8   9   10  10  12  12  10  9   8
Haines index....3   3   3   3   3   3   3   3   3   3   3   3
SDspl kt-ft/100010  10  10  10  14  18  19  23  24  19  14  9

.FORECAST DAYS 3 THROUGH 5...
.SATURDAY...
Snow showers. Lows in the mid 20s. Highs in the lower 40s. Light
winds.
.SUNDAY...
Mostly cloudy with snow showers. Lows around 20. Highs in the mid
30s. Light winds.
.MONDAY...
Mostly cloudy. Chance of snow showers. Lows around 12. Highs in
the mid 30s. Light winds.

$$
Forecaster...Straub
Requested by...Eli Berman
Type of request...PRESCRIBED
.TAG 2427154.0/RIW
.DELDT 11/21/24
.FormatterVersion 2.0.0
.EMAIL eli.berman@usda.gov