649
FNUS75 KBYZ 190934
FWSBYZ

Spot Forecast for Lonesomewoood RX...USFS
National Weather Service Billings MT
334 AM MDT Sat Sep 19 2026

Forecast is based on ignition time of 0600 MDT on September 19.
If conditions become unrepresentative...contact the National Weather
Service.

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

.DISCUSSION...
Wet & cool weather continues today, with frequent showers and a
few thunderstorms at the burn site. Additional rainfall of
0.15-0.30" is expected. Shower activity will become isolated
Sunday as the air mass starts to turn drier. A warming and drying
trend is expected for much of next week. There is a low risk of
showers Tuesday night and Wednesday, but there is uncertainty
here. Otherwise, most of next week is looking warm and dry with
mostly light winds (winds could increase by late in the week).

.TODAY...

Sky/weather.........Mostly cloudy with numerous rain showers.
                    Isolated thunderstorms. Erratic wind gusts
                    possible near storms.
CWR.................60 percent.
Chance of lightning.20 percent.
Max temperature.....54-58.
Min humidity........70-74 percent.
Wind (20 ft)........
 Slope/valley.......Downslope/downvalley 2-5 mph early, then
                    east to southeast 4-8 mph.
 Ridgetop...........Northeast 5-10 mph.
Mixing height.......Increasing to 3500 ft AGL in the afternoon.
Transport winds.....Northeast 7 mph.

TIME (MDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........95  94  86  84  73  82  80  77  81  78  81  86
Weather cov.....NUM NUM NUM NUM NUM NUM NUM NUM NUM NUM NUM NUM
Weather type....RW  RW  RW  RW  RW  RW  RW  RW  RW  RW  RW  RW
Tstm cov........ISO ISO ISO ISO ISO ISO ISO ISO ISO ISO ISO ISO
Chc of ltng (%).15  15  15  15  20  20  20  20  20  20  20  20
Temp............44  44  43  44  46  48  50  53  54  55  56  54
RH..............100 100 100 98  94  92  89  84  78  72  72  73
20 FT wind dir..W   W   W   S   SE  E   E   E   E   E   SE  SE
20 FT wind spd..1   1   1   2   2   2   3   4   4   5   4   4
20 FT wind gust.2   2   3   4   5   6   7   7   8   8   8   7

.TONIGHT...

Sky/weather.........Mostly cloudy. Scattered showers and isolated
                    thunderstorms in the evening, then isolated
                    showers overnight. Erratic wind gusts possible
                    near storms.
CWR.................15 percent.
Chance of lightning.15 percent.
Min temperature.....34-38.
Max humidity........Near 100 percent.
Wind (20 ft)........
 Slope/valley.......East 4-8 mph becoming downslope/downvalley
                    2-5 mph.
 Ridgetop...........Northwest to north 5-10 mph.
Mixing height.......Decreasing to 500 ft AGL overnight.
Transport winds.....Northwest 5 mph.

TIME (MDT)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........87  87  80  69  75  63  55  74  64  73  56  52
Weather cov.....SCT SCT SCT SCT SCT ISO ISO ISO ISO ISO ISO ISO
Weather type....RW  RW  RW  RW  RW  RW  RW  RW  RW  RW  RW  RW
Tstm cov........ISO ISO ISO ISO ISO
Chc of ltng (%).20  20  15  15  15  10  10  5   5   0   0   0
Temp............51  49  46  45  45  44  44  43  42  41  39  37
RH..............80  85  90  90  91  92  93  97  98  99  99  100
20 FT wind dir..E   SE  SW  W   W   W   NW  NW  NW  NW  W   NW
20 FT wind spd..4   3   2   2   1   1   1   2   2   2   3   2
20 FT wind gust.6   6   5   6   5   4   4   4   4   4   4   4

.SUNDAY...

Sky/weather.........Partly sunny with isolated showers.
CWR.................5 percent.
Chance of lightning.10 percent.
Max temperature.....58-62.
Min humidity........54-58 percent.
Wind (20 ft)........
 Slope/valley.......Downslope/downvalley 2-5 mph early, then
                    northeast to east 4-8 mph.
 Ridgetop...........Northwest 5-10 mph.
Mixing height.......Increasing to 5000 ft AGL in the afternoon.
Transport winds.....Northwest 9 mph.

TIME (MDT)      6 AM      9 AM      NOON      3 PM
Sky (%).........60        54        58        47
Weather cov.....ISO       ISO       ISO       ISO
Weather type....RNSHWR    RNSHWR    RNSHWR    RNSHWR
Tstm cov........
Chc of ltng (%).0         0         5         5
Temp............37        41        53        59
RH..............100       93        73        56
20 FT wind......NW 2G4    NW 2G5    NE 3G7    E 4G7

.FORECAST DAYS 3 THROUGH 7...
.MONDAY...
Partly cloudy. Lows in the mid 30s. Highs in the mid to upper
60s. Light terrain-driven winds.
.TUESDAY...
Mostly clear. Lows in the upper 30s. Highs in the upper 60s.
Southwest winds 5 to 10 mph.
.WEDNESDAY...
Partly cloudy. Slight chance of showers. Lows in the upper 30s.
Highs in the upper 60s. Southwest winds around 10 mph.
.THURSDAY AND FRIDAY...
Mostly clear. Lows in the upper 30s. Highs around 70.

$$
Forecaster...Lester
Requested by...Chris Enriquez
Type of request...PRESCRIBED
.TAG 2621360.10/BYZ
.DELDT 09/19/26
.FormatterVersion 2.0.0
.EMAIL christian.enriquez@usda.gov,tyler.kuhn@usda.gov,nicholas.nelson@usda.gov