907
FNUS75 KBYZ 201035
FWSBYZ

Spot Forecast for Bozeman WZ Piles Unit 73...USFS
National Weather Service Billings MT
335 AM MST Thu Nov 20 2025

Forecast is based on ignition time of 0700 MST on November 20.
If conditions become unrepresentative...contact the National Weather
Service.

Please contact our office if you have questions
or concerns with this forecast.

.DISCUSSION...
We are looking for seasonally mild and dry conditions over the
burn site today through the weekend. Winds will be light and
mainly terrain driven today through Friday morning. Winds are
expected to pick up some Friday and become a bit busty in the late
day. Ridgetop winds will be light today, but pick up tonight into
Friday from the west. BT


.REST OF TODAY...

Sky/weather.........Sunny.
CWR.................0 percent.
Max temperature.....39-43.
Min humidity........55-59 percent.
Wind (20 ft)........
 Slope/valley.......South winds up to 5 mph early in the morning
                    becoming light.
 Ridgetop...........Southwest around 10 mph.
Mixing height.......0 ft AGL early in the morning increasing to
                    2200 ft AGL in the afternoon.
Transport winds.....Southwest 3 to 6 mph shifting to the north
                    around 3 mph late in the afternoon.

TIME (MST)      7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........27  24  20  20  13  11  12  10  7   10  10
Weather cov.....
Weather type....
Tstm cov........
Temp............27  27  29  32  36  38  39  41  39  39  35
RH..............88  86  83  77  71  67  62  58  58  60  70
20 FT wind dir..S   S   S   SW  W   W   NW  W   N   E   E
20 FT wind spd..5   5   4   4   3   4   4   4   3   3   2
20 FT wind gust.6   6   6   6   7   7   8   8   7   6   6

.TONIGHT...

Sky/weather.........Mostly clear.
CWR.................0 percent.
Min temperature.....24-28.
Max humidity........83-87 percent.
Wind (20 ft)........
 Slope/valley.......Light winds becoming southwest up to 5 mph late
                    in the evening.
 Ridgetop...........West around 10 mph increasing to around 20 mph
                    early in the morning.
Mixing height.......0 ft AGL.
Transport winds.....Northwest around 3 mph shifting to the west
                    early in the evening.

TIME (MST)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........11  14  13  14  14  12  15  12  18  18  24  24
Weather cov.....
Weather type....
Tstm cov........
Temp............33  31  31  30  29  29  30  29  28  27  27  27
RH..............74  79  77  79  81  78  76  79  79  80  80  82
20 FT wind dir..SE  SE  S   S   S   W   SW  SW  W   SW  SW  W
20 FT wind spd..2   3   3   4   4   5   5   5   5   5   5   5
20 FT wind gust.5   5   5   5   5   6   6   6   6   6   6   7

.FRIDAY...

Sky/weather.........Sunny.
CWR.................0 percent.
Max temperature.....37-41.
Min humidity........52-56 percent.
Wind (20 ft)........
 Slope/valley.......West winds up to 6-10 mph. Gusts up to 18 mph late
                    in the afternoon.
 Ridgetop...........West around 20 mph increasing to around 30 mph
                    late in the afternoon.
Mixing height.......0 ft AGL early in the morning increasing to 600
                    ft AGL in the afternoon.
Transport winds.....West 8 to 13 mph.

TIME (MST)      6 AM      9 AM      NOON      3 PM
Sky (%).........25        22        19        12
Weather cov.....
Weather type....NONE      NONE      NONE      NONE
Tstm cov........
Temp............27        29        37        37
RH..............85        82        60        57
20 FT wind......SW 5G7    SW 6G8    W 6G11    W 8G16

$$
Forecaster...Tesar
Requested by...Tyeler Kuhn
Type of request...PRESCRIBED
.TAG 2526355.1/BYZ
.DELDT 11/20/25
.FormatterVersion 2.0.0
.EMAIL nicholas.nelson@usda.gov,tyler.kuhn@usda.gov