963
FNUS75 KBYZ 271907
FWSBYZ

Spot Forecast for Hyalite Dam Piles...USFS
National Weather Service Billings MT
1207 PM MST Tue Jan 27 2026

Forecast is based on ignition time of 0700 MST on January 28.
If conditions become unrepresentative...contact the National Weather
Service.

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

.DISCUSSION...
Wednesday will begin dry, but there will be a period of snow
showers in the afternoon and evening that could produce up to an
inch of snow accumulation, along with reduced visibility. Expect
upvalley winds gusting near 20 mph during the peak heating hours.
Thursday looks dry with upvalley winds continuing.

.WEDNESDAY...

Sky/weather.........Increasing clouds. Scattered snow showers after
                    noon. Snow accumulation an inch or less.
CWR.................10 percent.
Max temperature.....32-36.
Min humidity........40-44 percent.
Wind (20 ft)........
 Slope/valley.......Light downvalley early, then west to northwest
                    10-15 mph. Afternoon gusts near 20 mph.
 Ridgetop...........West 15-25 mph.
Mixing height.......Increasing to 3000 ft AGL in the afternoon.
Transport winds.....West 18 mph.

TIME (MST)      7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........56  64  68  73  76  78  83  90  93  93  90
Weather cov.....                    ISO ISO SCT SCT SCT SCT
Weather type....                    SN  SN  SN  SN  SN  SN
Temp............19  18  21  23  28  30  33  34  33  32  30
RH..............55  60  47  44  42  53  55  53  60  63  65
20 FT wind dir..SE  VRB VRB SW  W   W   W   W   NW  NW  NW
20 FT wind spd..3   3   4   5   6   8   10  11  12  12  11
20 FT wind gust.8   6   6   8   10  12  13  15  17  19  18

.WEDNESDAY NIGHT...

Sky/weather.........Mostly cloudy with isolated snow showers in the
                    evening, then becoming partly cloudy.
CWR.................5 percent.
Min temperature.....15-19.
Max humidity........81-85 percent.
Wind (20 ft)........
 Slope/valley.......West to northwest 6-12 mph. Evening gusts to
                    18 mph.
 Ridgetop...........West 15-25 mph.
Mixing height.......Decreasing to 1000 ft AGL overnight.
Transport winds.....West 12 mph.

TIME (MST)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........88  88  82  82  82  67  67  67  56  56  56  45
Weather cov.....SCT ISO ISO ISO
Weather type....SN  SN  SN  SN
Temp............29  27  25  24  23  23  22  21  19  18  18  17
RH..............69  72  76  78  79  80  81  82  82  81  80  80
20 FT wind dir..NW  NW  NW  NW  W   NW  W   W   NW  W   W   W
20 FT wind spd..10  9   8   8   7   6   7   7   6   6   6   6
20 FT wind gust.18  16  15  13  12  11  12  12  12  11  11  10

.THURSDAY...

Sky/weather.........Partly sunny.
CWR.................0 percent.
Max temperature.....32-36.
Min humidity........49-53 percent.
Wind (20 ft)........
 Slope/valley.......West to northwest 6-12 mph. Gusts to 18 mph
                    in the late morning and afternoon.
 Ridgetop...........West 10-20 mph.
Mixing height.......Increasing to 3500 ft AGL in the afternoon.
Transport winds.....West 15 mph.

TIME (MST)      6 AM      9 AM      NOON      3 PM
Sky (%).........40        51        55        69
Weather cov.....
Weather type....NONE      NONE      NONE      NONE
Temp............17        20        28        34
RH..............81        77        61        51
20 FT wind......W 6G11    W 7G12    NW 9G16   NW 11G18

$$
Forecaster...Lester
Requested by...James Ray
Type of request...PRESCRIBED
.TAG 2601146.0/BYZ
.DELDT 01/27/26
.FormatterVersion 2.0.0
.EMAIL james.m.ray@usda.gov