401
FNUS75 KTFX 081551
FWSTFX

Spot Forecast for Horse Thief...Montana DNRC
National Weather Service Great Falls MT
851 AM MST Wed Jan 8 2025

Forecast is based on ignition time of 0900 MST on January 09.
If conditions become unrepresentative...contact the National Weather
Service.

.DISCUSSION...
Light snow develops by early afternoon, with periods of light snow
expected to then continue overnight. Dry conditions expected on
Thursday, with the next chance for snow late on Friday.
Temperatures will be mild the next few days, possibly reaching
the 40s on Friday.

.THURSDAY...

Sky/weather.........Mostly sunny (25-35 percent).
CWR.................0 percent.
LAL.................1.
Max temperature.....29-34.
Min humidity........62-67 percent.
Wind (20 ft)........
 Slope/valley.......West winds 10 to 15 mph. Gusts up to 30 mph in
                    the late morning and afternoon.
Mixing height.......1500 ft AGL.
Transport winds.....West 20 to 25 mph.
Haines Index........3 or very low potential for large plume
                    dominated fire growth.

TIME (MST)      9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........50  35  26  26  26  20  20  20  12
Weather cov.....
Weather type....
Tstm cov........
CWR.............0   0   0   0   0   0   0   0   0
LAL.............1   1   1   1   1   1   1   1   1
Temp............25  26  27  28  30  31  30  28  26
RH..............83  85  81  80  77  73  71  68  67
20 FT wind dir..W   W   W   W   W   W   W   W   W
20 FT wind spd..15  15  15  15  15  15  15  15  10
20 FT wind gust.30  30  25  25  25  25  25  25  15
Mix hgt (kft)...1.0 1.0 1.0 1.0 1.5 1.5 1.5 1.0 0.5
Transp wind dir.W   W   W   W   W   W   W   W   W
Transp wind spd.25  25  25  25  25  25  25  20  20
Haines index....3   3   3   3   3   3   3   3   3

.THURSDAY NIGHT...

Sky/weather.........Mostly clear (15-25 percent).
CWR.................0 percent.
LAL.................1.
Min temperature.....14-19.
Max humidity........62-67 percent.
Wind (20 ft)........
 Slope/valley.......Southwest winds around 10 mph.
Mixing height.......500 ft AGL.
Transport winds.....West 10 to 15 mph.

TIME (MST)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........12  12  12  12  12  30  30  30  24  24  24  24
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............24  22  21  21  21  21  21  21  21  21  21  21
RH..............67  67  67  67  67  67  66  64  62  61  60  60
20 FT wind dir..W   W   W   W   W   SW  SW  SW  SW  SW  SW  SW
20 FT wind spd..10  10  10  10  10  10  10  10  10  10  10  10
20 FT wind gust.15  15  15  15  15  15  15  15  15  15  15  15
Mix hgt (kft)...0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5
Transp wind dir.W   W   W   W   W   W   W   W   W   W   W   W
Transp wind spd.15  15  15  15  15  10  10  10  15  15  15  15

.FRIDAY...

Sky/weather.........Sunny (20-30 percent) then becoming partly
                    sunny (65-75 percent). Slight chance of snow
                    late in the afternoon.
CWR.................Increasing to 10 percent late in the
                    afternoon.
LAL.................1.
Max temperature.....39-44.
Min humidity........54-59 percent.
Wind (20 ft)........
 Slope/valley.......Southwest winds 10 to 15 mph shifting to the
                    west around 20 mph late in the afternoon.
Mixing height.......1000 ft AGL.
Transport winds.....West 15 to 20 mph increasing to 25 to 30 mph 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 (%).........24  24  55  55  55  64  64  64  74  74  74  82
Weather cov.....                    SCH SCH SCH SCH SCH SCH CHC
Weather type....                    SN  SN  SN  SN  SN  SN  SN
Tstm cov........
CWR.............0   0   0   0   0   10  10  10  10  10  10  10
LAL.............1   1   1   1   1   1   1   1   1   1   1   1
Temp............22  24  25  28  32  35  37  38  38  38  38  37
RH..............60  61  61  60  59  58  58  58  59  60  61  62
20 FT wind dir..SW  SW  SW  SW  SW  W   W   W   W   W   W   W
20 FT wind spd..10  10  10  10  10  10  10  10  15  15  15  20
20 FT wind gust.15  15  20  20  20  20  20  20  25  25  25  30
Mix hgt (kft)...0.5 0.5 0.5 0.5 0.5 0.5 1.0 1.0 1.0 1.0 1.0 1.0
Transp wind dir.W   W   W   W   W   W   W   W   W   W   W   W
Transp wind spd.15  15  15  15  15  20  25  25  30  30  30  30
Haines index....M   2   2   2   2   2   2   2   2   2   2   2

$$
Forecaster...Brusda
Requested by...Clint Mrnak
Type of request...PRESCRIBED
.TAG 2500265.0/TFX
.DELDT 01/08/25
.FormatterVersion 2.0.0
.EMAIL Clinton.Mrnak@MT.gov