944
FNUS75 KBYZ 170943
FWSBYZ

Spot Forecast for Lonesomewoood RX...USFS
National Weather Service Billings MT
343 AM MDT Thu Sep 17 2026

Forecast is based on ignition time of 0600 MDT on September 17.
If conditions become unrepresentative...contact the National Weather
Service.

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

.DISCUSSION...

Periodic showers and isolated thunderstorms are expected to begin early
this morning between 0500 and 0700 MDT. Periods of moderate to heavy
rain are possible with any thunderstorms. There is some uncertainty on
if showers will continue into the overnight hours, but higher confidence
exists for showers and thunderstorms Friday afternoon and evening when
heavy rain and gusty winds are possible under stronger thunderstorms.
There`s about a 35% chance for at least an inch of precipitation Thursday
evening through Saturday. Precipitation looks to taper off Sunday evening
with Monday being a dry day. There is some uncertainty in the forecast
with regards to potential moisture moving into mid week. Currently,
Tuesday and Wednesday carry about a 10% chance of precipitation.

.TODAY...

Sky/weather.........Mostly cloudy. Slight chance of rain showers
                    early in the morning, then chance of rain
                    showers in the late morning and afternoon.
                    Chance of thunderstorms in the afternoon.
CWR.................40 percent.
Chance of lightning.27 percent.
Max temperature.....67-71.
Min humidity........64-70 percent.
Wind (20 ft)........
 Slope/valley.......North winds in the morning, becoming south up to
6 mph. Gusty and erratic winds expected near
thunderstorms in the afternoon.
 Ridgetop...........South around 10 mph.
Mixing height.......Increasing to 2600 ft AGL in the afternoon.
Transport winds.....East 5 to 6 mph shifting to the southwest at 15 mph
in the afternoon.

TIME (MDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........64  75  60  57  57  74  75  82  81  81  69  64
Weather cov.....SCH SCH SCH CHC CHC CHC CHC CHC CHC CHC CHC CHC
Weather type....RW  RW  RW  RW  RW  RW  RW  RW  RW  RW  RW  RW
Tstm cov........                        CHC CHC CHC CHC CHC CHC
Chc of ltng (%).10  10  10  10  10  10  30  30  30  30  30  30
Temp............45  43  45  47  53  57  61  65  64  65  67  64
RH..............81  84  85  85  80  75  65  62  59  56  56  58
20 FT wind dir..N   N   N   N   E   S   S   S   SW  SW  S   S
20 FT wind spd..3   3   2   2   2   3   4   5   5   6   7   5

.TONIGHT...

Sky/weather.........Mostly cloudy then becoming partly cloudy then
                    becoming mostly cloudy. Patchy fog after 3 am.
                    Rain showers likely after 3 am.
CWR.................40 percent.
Chance of lightning.11 percent.
Min temperature.....42-46.
Max humidity........98-100 percent.
Wind (20 ft)........
 Slope/valley.......Light winds.
 Ridgetop...........South around 10 mph.
Mixing height.......400 ft AGL overnight.
Transport winds.....South becoming west aorund 5 mph.

TIME (MDT)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........56  54  54  43  40  54  53  51  61  70  74  70
Weather cov.....                                    LKY LKY LKY
Weather type....                                    RW  RW  RW
Tstm cov........
Chc of ltng (%).10  10  10  10  10  10  10  10  10  10  10  10
Temp............63  61  55  53  53  52  51  49  49  48  48  46
RH..............63  75  78  81  80  81  83  90  91  92  95  96
20 FT wind dir..S   S   W   NW  NW  NW  NW  NW  W   SW  SW  S
20 FT wind spd..5   5   4   4   4   3   2   2   1   2   2   3

.FRIDAY...

Sky/weather.........Mostly cloudy. Patchy fog early in the morning.
                    Chance of rain showers in the morning. Rain
                    showers and chance of thunderstorms in the
                    afternoon.
CWR.................65 percent.
Chance of lightning.32 percent.
Max temperature.....64-68.
Min humidity........67-71 percent.
Wind (20 ft)........
 Slope/valley.......Light winds becoming south 3 to 6 mph. Gusty
                    and erratic winds expected near thunderstorms
                    in the afternoon.
 Ridgetop...........South around 10 mph.
Mixing height.......Increasing to 4200 ft AGL in the afternoon.
Transport winds.....East at 5 mph becoming south at 15 mph.

TIME (MDT)      6 AM      9 AM      NOON      3 PM
Sky (%).........70        73        86        92
Weather cov.....CHANCE    CHANCE    DEFNTE    DEFNTE
Weather type....RNSHWR    RNSHWR    RNSHWR    RNSHWR
Tstm cov........                    CHANCE    CHANCE
Chc of ltng (%).10        10        30        30
Temp............46        47        60        61
RH..............97        100       79        69
20 FT wind......S 3G4     E 3G5     S 3G6     SW 3G6

.FORECAST DAYS 3 THROUGH 7...
.SATURDAY...
Showers and chance of thunderstorms. Patchy fog. Lows in the
lower 40s. Highs around 60. Light winds.
.SUNDAY...
Mostly cloudy. Chance of showers and slight chance of
thunderstorms. Patchy fog overnight. Areas of fog in the morning.
Lows in the upper 30s. Highs in the mid 60s. Light winds.
.MONDAY...
Mostly clear. Lows in the upper 30s. Highs around 70. Light
winds.
.TUESDAY...
Mostly clear. Lows in the upper 30s. Highs around 70.
.WEDNESDAY...
Mostly clear. Lows in the upper 30s. Highs around 70.

$$
Forecaster...Stetzer
Requested by...Chris Enriquez
Type of request...PRESCRIBED
.TAG 2621360.8/BYZ
.DELDT 09/17/26
.FormatterVersion 2.0.0
.EMAIL tyler.kuhn@usda.gov,nicholas.nelson@usda.gov,christian.enriquez@usda.gov