989
FNUS75 KRIW 301604
FWSRIW

Spot Forecast for North Fork Pile Burning...USDA Forest Service
National Weather Service Riverton WY
536 AM MST Thu Jan 30 2025

Forecast is based on ignition time of 0800 MST on January 30.
If conditions become unrepresentative, contact the National Weather
Service

.DISCUSSION...

A mainly clear sky will continue today. West wind will continue today,
mainly dry to start the day, but will increase later in the morning
with gusts to around 15 mph between 1200 to 1800. Smoke dispersal
will be poor in the morning but will become fair after around 1200
this afternoon.

Breezy conditions will continue tonight and clouds will increase later
tonight. Wind will increase on Friday with a chance of snow after 1400
with snow becoming likely after 1700. Periods of snow will continue
into the weekend.

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

.REST OF TODAY...

Sky/weather.........Sunny (5-15 percent).
CWR.................0 percent.
Chance of pcpn......0 percent.
Max temperature.....Around 44.
Min humidity........29 percent.
Wind (20 ft)........West winds 7 to 10 mph with gusts to around 16
                    mph.
Ridgetop wind.......West around 15 mph.
Mixing height.......3500 ft AGL.
Transport winds.....West 14 to 17 mph.
Smoke dispersal.....Poor until 1200, then fair until 1600, then
                    poor.

TIME (MST)      8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........5   10  15  15  10  10  10  15  15  10
Weather cov.....
Weather type....
Tstm cov........
CWR.............0   0   0   0   0   0   0   0   0   0
Chc of pcpn (%).0   0   0   0   0   0   0   0   0   0
Temp............21  26  35  39  42  44  44  43  41  36
RH..............40  37  29  29  32  29  29  30  35  41
20 FT wind dir..W   W   W   W   W   W   W   W   W   W
20 FT wind spd..7   7   7   8   9   9   10  10  9   9
20 FT wind gust.11  11  11  13  14  14  16  16  14  14
Ridge wind dir..W   W   W   W   W   W   W   W   W   W
Ridge wind spd..15  15  15  15  15  15  15  15  15  15
Mix hgt (kft)...2.0 2.0 2.0 2.5 3.0 3.5 3.5 3.0 2.5 2.0
Transp wind dir.W   W   W   W   W   W   W   W   W   W
Transp wind spd.14  14  14  15  16  17  17  17  16  16
SDspl kt-ft/100025  24  27  34  43  51  50  46  32  29

.TONIGHT...

Sky/weather.........Mostly clear (15-25 percent).
CWR.................0 percent.
Chance of pcpn......0 percent.
Min temperature.....Around 21.
Max humidity........51 percent.
Wind (20 ft)........West winds 8 to 11 mph with gusts to around 17
                    mph.
Ridgetop wind.......West 15 to 20 mph.
Mixing height.......2000 ft AGL.
Transport winds.....West 15 to 18 mph.
Smoke dispersal.....Poor.

TIME (MST)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........5   15  25  30  35  30  20  20  20  20  25  35
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
Temp............31  29  26  25  23  23  21  22  21  21  21  21
RH..............46  48  51  49  51  49  50  49  49  47  48  49
20 FT wind dir..W   W   W   W   W   W   W   W   W   W   W   W
20 FT wind spd..9   8   9   9   9   9   9   9   9   10  10  11
20 FT wind gust.14  13  14  14  14  14  14  14  14  16  16  17
Ridge wind dir..W   W   W   W   W   W   W   W   W   W   W   W
Ridge wind spd..15  15  15  15  15  15  15  15  15  15  15  20
Mix hgt (kft)...2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0
Transp wind dir.W   W   W   W   W   W   W   W   W   W   W   W
Transp wind spd.16  15  16  16  16  16  16  16  16  17  17  18
SDspl kt-ft/100028  27  29  29  29  29  29  29  29  31  31  33

.FRIDAY...

Sky/weather.........Partly sunny (50-60 percent). Chance of snow
                    late in the afternoon.
CWR.................0 percent increasing to 35 percent late in the
                    afternoon.
Chance of pcpn......70 percent.
Max temperature.....Around 38.
Min humidity........34 percent.
Wind (20 ft)........West winds 11 to 19 mph. Gusts up to 28 mph
                    increasing to 37 mph late in the morning.
Ridgetop wind.......West 20 to 25 mph until 1300, then 25 to 30
                    mph.
Mixing height.......3500 ft AGL until 1200, then 4000 ft AGL.
Transport winds.....West 18 to 23 mph until 1100, then 26 to 33
                    mph.
Smoke dispersal.....Poor until 0900, then fair until 1100, then
                    good early in the morning increasing to very
                    good in the afternoon until 1700, then good.

TIME (MST)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........40  45  45  45  45  45  50  60  65  65  60  60
Weather cov.....                                CHC CHC CHC LKY
Weather type....                                SN  SN  SN  SN
Tstm cov........
CWR.............0   0   0   0   0   0   0   0   0   0   0   40
Chc of pcpn (%).0   0   0   0   0   10  10  10  40  40  40  70
Temp............21  21  22  27  32  35  37  38  38  36  35  33
RH..............49  47  46  41  37  35  34  35  37  41  45  49
20 FT wind dir..W   W   W   W   W   W   W   W   W   W   W   W
20 FT wind spd..11  12  13  14  15  17  17  18  19  19  18  17
20 FT wind gust.17  18  19  21  22  25  26  28  30  30  28  26
Ridge wind dir..W   W   W   W   W   W   W   W   W   W   W   W
Ridge wind spd..20  20  20  20  25  25  25  30  30  30  30  25
Mix hgt (kft)...2.0 2.0 2.0 2.5 3.0 3.5 4.0 4.0 4.0 3.5 3.0 2.5
Transp wind dir.W   W   W   W   W   W   W   W   W   W   W   W
Transp wind spd.18  20  21  22  23  28  30  31  33  30  28  26
SDspl kt-ft/100033  35  37  44  59  86  98  107 120 95  77  63

.FORECAST DAYS 3 THROUGH 5...
.SATURDAY...
Snow. Lows around 30. Highs in the upper 30s. West winds around
16 mph.
.SUNDAY...
Snow. Lows in the mid 20s. Highs in the mid 30s. West winds
around 15 mph.
.MONDAY...
Snow. Lows in the mid 20s. Highs in the upper 30s. West winds
around 12 mph.

$$
Forecaster...Hattings
Requested by...Ray Varland
Type of request...PRESCRIBED
.TAG 2501618.2/RIW
.DELDT 01/30/25
.FormatterVersion 2.0.0
.EMAIL ray.varland@usda.gov