162
FNUS75 KCYS 192310
FWSCYS

Spot Forecast for La Bonte Fire...BLM
National Weather Service Cheyenne WY
510 PM MDT Thu Sep 19 2024

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

.DISCUSSION...

Poor humidity recoveries are expected tonight with southwest winds. Maximum
RHs will rise to about 40 percent. No precipitation is expected on Friday, but
critical to near-critical fire weather conditions are likely. Minimum RH values
will be around 15 percent with westerly winds at 15 MPH. Gusts of 20 to 25 MPH
are expected. Better overnight recoveries are forecast Friday night with
northwest winds.

.REST OF TODAY...

Sky/weather.........Sunny (0-10 percent).
CWR.................0 percent.
LAL.................1.
Max temperature.....Around 72.
Min humidity........22 percent.
Wind (20 ft)........West winds 12 to 13 mph.
Mixing height.......8900 ft AGL.
Transport winds.....West around 28 mph.
Smoke dispersal.....Excellent (208900 knot-ft).
Haines Index........3 or very low potential for large plume
                    dominated fire growth.

TIME (MDT)      5PM
Sky (%).........5
Weather cov.....
Weather type....
Tstm cov........
CWR.............0
LAL.............1
Temp............71
RH..............22
20 FT wind dir..W
20 FT wind spd..13
20 FT wind gust.22
Mix hgt (kft)...8.9
Transp wind dir.W
Transp wind spd.28
Haines index....3
SDspl kt-ft/1000223

.TONIGHT...

Sky/weather.........Mostly clear (0-10 percent).
CWR.................0 percent.
LAL.................1.
Min temperature.....Around 51.
Max humidity........39 percent.
Wind (20 ft)........Southwest winds 6 to 12 mph decreasing to 6 to
                    9 mph late in the evening.
Mixing height.......300 ft AGL.
Transport winds.....West 20 to 26 mph becoming southwest 8 to 16
                    mph in the late evening and overnight.
Smoke dispersal.....Excellent (195000 knot-ft) early in the evening
                    decreasing to very good (118100 knot-ft) late
                    in the night decreasing to good (61800 knot-ft)
                    early in the evening decreasing to poor (3600
                    knot-ft) late in the night early in the
                    evening.
Haines Index........4 or low potential for large plume dominated
                    fire growth.

TIME (MDT)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........4   4   4   8   8   8   9   9   9   8   8   8
Weather cov.....
Weather type....
Tstm cov........
CWR.............0   0   0   0   0   0   0   0   0   0   0   0
LAL.............1   1   1   1   1   1   1   1   1   1   1   1
Temp............69  66  62  58  56  56  55  54  54  53  53  53
RH..............23  26  29  34  35  35  38  38  37  39  38  37
20 FT wind dir..W   W   W   SW  SW  SW  S   SW  SW  SW  SW  SW
20 FT wind spd..12  10  9   8   6   6   6   6   7   7   8   9
20 FT wind gust.18  17  15  13  10  10  9   9   12  12  14  15
Mix hgt (kft)...8.1 5.9 3.1 0.9 0.3 0.5 0.8 0.9 0.9 1.0 1.0 1.0
Transp wind dir.W   W   W   W   W   SW  SW  SW  SW  SW  SW  SW
Transp wind spd.26  23  20  16  13  9   8   8   9   12  14  15
Haines index....4   4   4   4   4   4   4   4   4   4   4   4
SDspl kt-ft/1000195 130 62  19  8   7   8   9   11  13  15  17

.FRIDAY...

Sky/weather.........Sunny (5-15 percent).
CWR.................0 percent.
LAL.................1.
Max temperature.....Around 78.
Min humidity........15 percent.
Wind (20 ft)........West winds 9 to 16 mph.
Mixing height.......10400 ft AGL increasing to 11400 ft AGL in the
                    afternoon.
Transport winds.....West 17 to 26 mph increasing to 29 to 31 mph
                    late in the afternoon.
Smoke dispersal.....Poor (14400 knot-ft) early in the morning
                    increasing to good (97400 knot-ft) in the
                    afternoon increasing to excellent (261800
                    knot-ft).
Haines Index........4 or low potential for large plume dominated
                    fire growth.

TIME (MDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........8   8   8   5   5   5   2   2   2   13  13  13
Weather cov.....
Weather type....
Tstm cov........
CWR.............0   0   0   0   0   0   0   0   0   0   0   0
LAL.............1   1   1   1   1   1   1   1   1   1   1   1
Temp............53  54  58  62  67  70  73  74  76  77  76  75
RH..............38  37  32  28  24  22  20  19  17  15  16  17
20 FT wind dir..SW  SW  SW  SW  W   W   W   W   W   W   W   W
20 FT wind spd..10  10  12  12  13  14  14  15  16  16  16  16
20 FT wind gust.16  16  18  18  21  22  22  23  25  25  25  24
Mix hgt (kft)...1.0 0.9 1.1 2.1 4.7 7.8 10  11  11  11  11  11
Transp wind dir.SW  SW  W   W   W   W   W   W   W   W   W   W
Transp wind spd.17  18  21  22  22  22  22  24  26  29  30  31
Haines index....4   4   4   4   4   4   4   4   4   4   4   4
SDspl kt-ft/100020  21  27  47  97  157 210 250 278 292 310 307

$$
Forecaster...Fuller
Requested by...Chris Colt/Anna Sammer
Type of request...WILDFIRE
.TAG 2422495.3/CYS
.DELDT 09/19/24
.FormatterVersion 2.0.0
.EMAIL 2024.labonte.plans@firenet.gov