547
FNUS75 KTFX 051300
FWSTFX

Spot Forecast for Judith Peak Pile RX...BLM
National Weather Service Great Falls MT
600 AM MST Fri Dec 5 2025

Forecast is based on ignition time of 0700 MST on December 05.
If conditions become unrepresentative...contact the National Weather
Service.

...Gusty winds with frontal passage tonight...

.DISCUSSION...
Light snow showers will diminish this morning. Should be ok this
afternoon. Snow arrives this evening, mostly after 7 PM. Strong
winds are possible at ridge tops tonight. New snow amounts of a
few inches are possible in the Judith Mountains. A few scattered
mountain snow showers are possible on Saturday.

.REST OF TODAY...

Sky/weather.........Partly sunny (55-65 percent). Slight chance of
                    snow early in the morning, then chance of snow
                    early in the morning.
CWR.................10 percent decreasing to 0 percent late in the
                    morning.
Max temperature.....29-34.
Min humidity........78-83 percent.
Wind (20 ft)........
 Slope/valley.......West winds 10 to 15 mph decreasing to around 5
                    mph early in the afternoon, then shifting to
                    the southwest late in the afternoon.
Mixing height.......500 ft AGL.
Transport winds.....West 15 to 20 mph decreasing to around 10 mph
                    early in the afternoon, then shifting to the
                    south late in the afternoon.

TIME (MST)      7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........78  77  77  71  60  41  41  38  58  60  55
Weather cov.....SCH CHC CHC CHC
Weather type....SN  SN  SN  SN
Tstm cov........
CWR.............10  10  10  10  0   0   0   0   0   0   10
Temp............23  25  25  26  27  28  28  30  28  27  25
RH..............93  93  97  100 100 100 98  96  96  98  97
20 FT wind dir..W   W   W   W   W   W   W   SW  SW  SW  SW
20 FT wind spd..15  15  10  10  10  5   5   5   5   5   5
20 FT wind gust.25  25  20  15  15  15  15  15  15  15  15
Mix hgt (kft)...0.1 0.1 0.1 0.1 0.5 0.5 0.5 0.5 0.1 0.1 0.1
Transp wind dir.W   W   W   W   W   W   W   W   W   SW  S
Transp wind spd.20  15  15  15  15  15  10  10  10  5   10

.TONIGHT...

Sky/weather.........Mostly cloudy (80-90 percent). Snow through the
                    night.
CWR.................30 percent increasing to 70 percent late in the
                    evening, then decreasing to 50 percent early in
                    the morning.
Min temperature.....16-21.
Max humidity........95-100 percent.
Wind (20 ft)........
 Slope/valley.......Southwest winds 5 to 10 mph with gusts to
                    around 25 mph shifting to the west around 15
                    mph with gusts to around 40 mph overnight.
Mixing height.......100 ft AGL.
Transport winds.....Southwest 10 to 15 mph shifting to the west
                    around 20 mph after 3 am.

TIME (MST)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........72  83  83  89  94  94  86  90  89  93  94  94
Weather cov.....            CHC LKY DEF DEF CHC CHC LKY LKY LKY
Weather type....            SN  SN  SN  SN  SN  SN  SN  SN  SN
Tstm cov........
CWR.............30  30  30  30  30  70  70  70  70  70  70  50
Temp............25  27  26  27  27  28  28  28  26  26  25  21
RH..............88  85  85  87  90  90  88  86  87  88  91  92
20 FT wind dir..SW  SW  SW  SW  SW  SW  SW  W   W   W   W   W
20 FT wind spd..5   10  10  10  10  10  10  10  15  15  15  15
20 FT wind gust.15  15  15  20  20  20  20  25  25  30  30  30
Mix hgt (kft)...0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1
Transp wind dir.SW  S   SW  SW  SW  SW  W   W   W   W   W   NW
Transp wind spd.10  10  10  10  10  10  10  15  15  20  20  20

.SATURDAY...

Sky/weather.........Mostly cloudy (80-90 percent). Snow likely in
                    the morning, then slight chance of snow late in
                    the morning and afternoon.
CWR.................50 percent in the morning, and  20 percent
                    in the afternoon.
Max temperature.....22-27.
Min humidity........74-79 percent.
Wind (20 ft)........
 Slope/valley.......Northwest winds 10 to 15 mph with gusts to
                    around 30 mph decreasing to around 5 mph late
                    in the afternoon.
Mixing height.......400 ft AGL.
Transport winds.....Northwest 15 to 20 mph shifting to the west
                    around 10 mph late in the afternoon.

TIME (MST)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........93  92  92  89  87  85  85  85  75  75  75  90
Weather cov.....LKY LKY LKY LKY LKY SCH SCH SCH SCH SCH SCH CHC
Weather type....SN  SN  SN  SN  SN  SN  SN  SN  SN  SN  SN  SN
Tstm cov........
CWR.............50  50  50  50  50  10  10  10  10  10  10  20
Temp............22  20  19  19  19  18  21  20  18  16  16  16
RH..............96  98  95  100 99  100 99  100 100 96  90  86
20 FT wind dir..NW  NW  NW  NW  NW  NW  NW  NW  NW  NW  NW  W
20 FT wind spd..15  15  15  10  10  10  10  10  5   5   5   5
20 FT wind gust.30  25  25  20  20  15  15  15  15  15  15  15
Mix hgt (kft)...0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.2 0.2 0.3 0.4 0.3
Transp wind dir.NW  NW  NW  NW  W   NW  NW  NW  W   W   W   W
Transp wind spd.20  20  20  20  20  20  20  20  15  15  10  10

$$
Forecaster...Brusda
Requested by...Jay Peterman
Type of request...PRESCRIBED
.TAG 2526658.4/TFX
.DELDT 12/05/25
.FormatterVersion 2.0.0
.EMAIL jpeterman@blm.gov,masnyder@blm.gov,cparker@blm.gov