903
FNUS75 KCYS 201604
FWSCYS

Spot Forecast for Boulder Ridge slash pile Rx burn...BLM
National Weather Service Cheyenne WY
Issued by National Weather Service Riverton WY
904 AM MST Wed Nov 20 2024

If conditions become unrepresentative, contact the National Weather
Service at (307) 772-2227

.DISCUSSION...
Gusty winds will continue today with frequent westerly gusts of 40
to 50 mph. Gusty winds continue tonight, with gusts remaining
above 35 mph through the night. Winds will finally relax during
the day Thursday, lowering to 10 to 15 mph Thursday afternoon.

Drier air will remain in place today, remaining between 25 and 30
percent through the afternoon. Temperatures will generally remain
below freezing, and combined with gusty winds will bring wind
chills readings near zero through the day. Skies remain nearly
clear through the next 36 hours.

.REST OF TODAY...

Sky/weather.........Sunny (0-10 percent).
CWR.................0 percent.
Max temperature.....Around 35.
Min humidity........27 percent.
Wind (20 ft)........Windy. West winds 29 to 35 mph with gusts to
                    around 48 mph.
Mixing height.......2200 ft AGL.
Transport winds.....West 47 to 54 mph.
Smoke dispersal.....Poor (39400 knot-ft) early in the morning
                    increasing to good (95600 knot-ft) in the
                    afternoon.
Haines Index........2 to 3 or very low potential for large plume
                    dominated fire growth.

TIME (MST)      8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........2   3   4   5   5   4   4   4   4   4
Weather cov.....
Weather type....
Tstm cov........
CWR.............0   0   0   0   0   0   0   0   0   0
Temp............19  23  26  29  31  33  34  35  33  31
RH..............32  28  27  27  27  27  27  28  32  36
20 FT wind dir..M   M   M   M   M   M   M   M   M   M
20 FT wind spd..M   M   M   M   M   M   M   M   M   M
20 FT wind gust.48  47  46  45  45  45  44  43  41  39
Mix hgt (kft)...0.9 1.1 1.4 1.7 2.0 2.2 2.2 2.0 1.6 1.3
Transp wind dir.W   W   W   W   W   W   W   W   W   W
Transp wind spd.53  54  54  54  53  51  49  48  48  47
Haines index....3   3   3   2   2   2   2   2   2   2
SDspl kt-ft/100039  51  66  80  90  96  94  84  69  53

.TONIGHT...

Sky/weather.........Mostly clear (0-10 percent).
CWR.................0 percent.
Min temperature.....Around 28.
Max humidity........36 percent.
Wind (20 ft)........Breezy. West winds 25 to 28 mph with gusts to
                    around 39 mph.
Mixing height.......700 ft AGL.
Transport winds.....West 38 to 45 mph.
Smoke dispersal.....Fair (41800 knot-ft) early in the evening
                    decreasing to poor (22900 knot-ft) late in the
                    night.
Haines Index........2 to 3 or very low potential for large plume
                    dominated fire growth.

TIME (MST)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........4   5   6   5   5   5   5   5   5   6   6   7
Weather cov.....
Weather type....
Tstm cov........
CWR.............0   0   0   0   0   0   0   0   0   0   0   0
Temp............30  30  30  31  31  31  32  31  32  32  29  32
RH..............36  35  35  34  34  34  33  34  33  31  35  31
20 FT wind dir..M   M   M   M   M   M   M   M   M   M   M   M
20 FT wind spd..M   M   M   M   M   M   M   M   M   M   M   M
20 FT wind gust.39  39  39  38  36  36  36  36  37  37  37  36
Mix hgt (kft)...1.1 0.9 0.8 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7
Transp wind dir.W   W   W   W   W   W   W   W   W   W   W   W
Transp wind spd.45  43  40  39  39  39  40  40  41  40  39  38
Haines index....2   2   2   2   2   3   3   3   3   3   3   2
SDspl kt-ft/100042  33  28  25  25  25  24  24  24  23  23  23

.THURSDAY...

Sky/weather.........Sunny (15-25 percent).
CWR.................0 percent.
Max temperature.....Around 46.
Min humidity........24 percent.
Wind (20 ft)........West winds 16 to 24 mph with gusts to around 35
                    mph decreasing to 13 to 14 mph late in the
                    afternoon.
Mixing height.......3200 ft AGL.
Transport winds.....West 30 to 38 mph decreasing to 23 to 26 mph
                    late in the afternoon.
Smoke dispersal.....Poor (19200 knot-ft) early in the morning
                    increasing to good (94200 knot-ft) in the
                    afternoon.
Haines Index........2 or very low potential for large plume
                    dominated fire growth.

TIME (MST)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........7   8   8   12  16  20  20  21  22  24  26  28
Weather cov.....
Weather type....
Tstm cov........
CWR.............0   0   0   0   0   0   0   0   0   0   0   0
Temp............31  31  33  37  40  42  43  44  45  43  41  39
RH..............32  31  30  27  25  24  25  25  24  26  27  28
20 FT wind dir..M   M   M   M   M   M   M   M   M   M   M   M
20 FT wind spd..M   M   M   M   M   M   M   M   M   M   M   M
20 FT wind gust.35  33  31  30  28  26  25  25  24  20  15  13
Mix hgt (kft)...0.6 0.6 0.8 1.4 2.2 2.8 3.1 3.2 2.9 2.4 1.7 1.1
Transp wind dir.W   W   W   W   W   W   W   W   W   W   W   W
Transp wind spd.38  38  37  37  36  35  35  35  33  30  26  23
Haines index....2   2   2   2   2   2   2   2   2   2   2   2
SDspl kt-ft/100020  19  25  44  66  84  93  94  85  63  38  21

$$
Forecaster...Straub
Requested by...Christopher Otto
Type of request...PRESCRIBED
.TAG 2426831.2/CYS
.DELDT 11/20/24
.FormatterVersion 2.0.0
.EMAIL c75otto@blm.gov