763
FNUS75 KBYZ 181529
FWSBYZ
SPOT FORECAST FOR SMITH CREEK PILES...USFS
NATIONAL WEATHER SERVICE BILLINGS MT
829 AM MST THU DEC 18 2025
FORECAST IS BASED ON IGNITION TIME OF 0800 MST ON DECEMBER 18.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
PLEASE CONTACT OUR OFFICE IF YOU HAVE QUESTIONS
OR CONCERNS WITH THIS FORECAST.
DISCUSSION
TODAY WILL START OFF MOSTLY DRY AT THE SITE, BEFORE A WEATHER
SYSTEM BRINGS AN INCREASED CHANCE OF SNOW THIS AFTERNOON. ALONG
WITH THE SNOW, SOUTHWEST WINDS WILL INCREASE THROUGH THE LATE
AFTERNOON. THE CHANCE FOR MORE THAN 2 INCHES OF SNOWFALL, TODAY
THROUGH FRIDAY, IS AROUND 70 PERCENT. THE SOUTHWEST WINDS WILL
FURTHER INCREASE TONIGHT AND INTO FRIDAY MORNING, WITH GUSTS UP TO
55 MPH. EXPECT THESE WINDS TO DECREASE THROUGH THE DAY FRIDAY.
MATOS
TODAY
SKY/WEATHER.........PARTLY SUNNY THEN BECOMING CLOUDY. SLIGHT
CHANCE OF SNOW EARLY IN THE AFTERNOON,
THROUGH LATE AFTERNOON.
CWR.................INCREASING TO 40 PERCENT LATE IN THE
AFTERNOON.
MAX TEMPERATURE.....29-33.
MIN HUMIDITY........47-52 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......SOUTHWEST WINDS 10 TO 20 MPH WITH GUSTS TO
AROUND 30 MPH.
RIDGETOP...........WEST AROUND 25 MPH BECOMING SOUTHWEST
AROUND 35 MPH LATE IN THE AFTERNOON.
MIXING HEIGHT.......INCREASING TO 2200 FT AGL IN THE AFTERNOON.
TRANSPORT WINDS.....SOUTHWEST 15 TO 22 MPH INCREASING TO AROUND 25
MPH IN THE AFTERNOON.
TIME (MST) 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........49 42 54 62 69 86 88 86 89 93
WEATHER COV..... SCH SCHC SCH SCH
WEATHER TYPE.... SN SN SN SN
TSTM COV........
TEMP............17 19 20 22 24 25 26 27 26 29
RH..............60 55 51 49 47 53 60 69 75 77
20 FT WIND DIR..SW SW SW SW SW SW SW SW SW SW
20 FT WIND SPD..12 12 13 14 15 15 17 18 18 19
20 FT WIND GUST.20 20 21 22 25 25 29 30 30 31
TONIGHT
SKY/WEATHER.........MOSTLY CLOUDY. CHANCE OF SNOW IN THE EVENING,
THEN SNOW LIKELY OVERNIGHT. AREAS OF BLOWING
SNOW EARLY IN THE EVENING, THEN PATCHY BLOWING
SNOW OVERNIGHT.
CWR.................INCREASING TO 70 PERCENT LATE IN THE EVENING.
MIN TEMPERATURE.....23-27.
MAX HUMIDITY........85-90 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......BREEZY. SOUTHWEST WINDS 15 TO 25 MPH WITH GUSTS
40 TO 50 MPH.
RIDGETOP...........SOUTHWEST AROUND 35 MPH, BECOMING 50 TO 60 MPH,
AFTER MIDNIGHT.
MIXING HEIGHT.......DECREASING TO 400 FT AGL OVERNIGHT.
TRANSPORT WINDS.....SOUTHWEST 23 TO 31 MPH INCREASING TO AROUND 35
MPH AFTER 3 AM.
TIME (MST) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........95 92 92 92 88 85 84 72 84 88 87 93
WEATHER COV.....SCH SCH CHC CHC CHC CHC SCH PTY SCH SCH CHC LKY
WEATHER TYPE....SN SN SBS SBS SBS SN SBS BSN SN SN SN SN
TSTM COV........
TEMP............27 28 28 28 29 27 30 31 33 35 35 35
RH..............73 71 74 80 86 90 89 84 83 78 76 79
20 FT WIND DIR..SW SW SW SW SW SW SW SW SW SW SW SW
20 FT WIND SPD..17 19 21 22 22 22 23 23 24 24 25 25
20 FT WIND GUST.30 32 34 36 36 38 38 39 41 41 45 48
FRIDAY
SKY/WEATHER.........MOSTLY CLOUDY. PATCHY BLOWING SNOW INTO THE
EARLY AFTERNOON, THEN AREAS OF BLOWING
SNOW. SNOW LIKELY THROUGH THE EARLY AFTERNOON.
CWR.................80 PERCENT DECREASING TO 20 PERCENT LATE IN THE
AFTERNOON.
MAX TEMPERATURE.....34-38.
MIN HUMIDITY........66-72 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......BREEZY. WEST WINDS 15 TO 30 MPH DECREASING TO
10 TO 20 MPH LATE IN THE AFTERNOON. GUSTS 45 TO
55 MPH.
RIDGETOP...........WEST 50 TO 60 MPH DECREASING TO AROUND 20 MPH
LATE IN THE AFTERNOON.
MIXING HEIGHT.......INCREASING TO 2700 FT AGL IN THE AFTERNOON.
TRANSPORT WINDS.....WEST 37 TO 40 MPH.
TIME (MST) 6 AM 9 AM NOON 3 PM
SKY (%).........87 86 91 91
WEATHER COV.....LIKELY LIKELY DEFNTE DEFNTE
WEATHER TYPE....SNOW SNOW SNOW SNOW
TSTM COV........
TEMP............34 34 34 26
RH..............78 72 86 90
20 FT WIND......SW 27G50 W 29G54 W 24G45 W 20G40
FORECASTER...MATOS
REQUESTED BY...GREG OYLER
TYPE OF REQUEST...PRESCRIBED
.TAG 2526632.10/BYZ
.DELDT 12/18/25
.FORMATTERVERSION 2.0.0
.EMAIL GREGORY.OYLER@USDA.GOV
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