901
FNUS75 KBYZ 191237
FWSBYZ
SPOT FORECAST FOR HORN CREEK 2 PILE BURN...NORTHERN CHEYENNE AGENCY
NATIONAL WEATHER SERVICE BILLINGS MT
537 AM MST FRI DEC 19 2025
FORECAST IS BASED ON IGNITION TIME OF 0800 MST ON DECEMBER 19.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
PLEASE CONTACT OUR OFFICE IF YOU HAVE QUESTIONS
OR CONCERNS WITH THIS FORECAST.
DISCUSSION
GUSTY WESTERLY WINDS THIS MORNING WILL BE REPLACED BY WEAKER
WINDS OUT OF THE NW THIS AFTERNOON BEHIND A COLD FRONT PASSAGE.
EXPECT RAIN TRANSITIONING TO SNOW WITH THIS COLD FRONT MID TO LATE
AFTERNOON. UP TO 1" OF SNOW IS EXPECTED. GRADUALLY CLEARING SKIES
ARE FORECAST OVERNIGHT. LIGHT WINDS OUT OF THE WEST ARE EXPECTED
SATURDAY WITH SUNNY SKIES.
REST OF TODAY
SKY/WEATHER.........BECOMING CLOUDY. SLIGHT CHANCE OF RAIN AND SNOW
IN THE AFTERNOON BECOMING ALL SNOW LATE IN THE AFTERNOON.
CWR.................INCREASING TO 60 PERCENT LATE IN THE AFTERNOON.
MAX TEMPERATURE.....47-52.
MIN HUMIDITY........38-43 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......WEST WINDS 15 TO 25 MPH WITH GUSTS TO 35 MPH SHIFTING
TO THE NORTHWEST 10 TO 15 MPH LATE IN THE AFTERNOON.
RIDGETOP...........WEST AROUND 45 MPH BECOMING NORTHWEST AROUND 25
MPH IN THE AFTERNOON.
MIXING HEIGHT.......INCREASING TO 2200 FT AGL IN THE AFTERNOON.
TRANSPORT WINDS.....WEST 30 TO 40 MPH SHIFTING TO THE NORTHWEST AROUND
20 MPH IN THE AFTERNOON.
TIME (MST) 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........87 80 74 51 47 54 56 78 79 92
WEATHER COV..... SCH CHC CHC DEF
WEATHER TYPE.... RS RS RS SN
TSTM COV........
TEMP............47 49 50 51 50 50 47 41 37 36
RH..............59 41 38 38 39 41 46 63 69 64
20 FT WIND DIR..W W W W W W W W NW NW
20 FT WIND SPD..23 24 24 24 24 23 21 19 17 14
20 FT WIND GUST.32 33 33 33 33 31 30 26 23 19
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY. CHANCE OF SNOW EARLY
IN THE EVENING DIMINISHING OVERNIGHT.
CWR.................50 PERCENT DECREASING TO 0 PERCENT IN THE MORNING.
MIN TEMPERATURE.....27-31.
MAX HUMIDITY........65-69 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......WEST WINDS 7 TO 13 MPH.
RIDGETOP...........NORTHWEST 15 TO 20 MPH.
MIXING HEIGHT.......DECREASING TO 200 FT AGL OVERNIGHT.
TRANSPORT WINDS.....NORTHWEST 10 TO 20 MPH.
TIME (MST) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........95 93 88 75 58 42 32 28 26 25 22 21
WEATHER COV.....DEF DEF CHC CHC CHC SCH
WEATHER TYPE....SN SN SN SN SN SN
TSTM COV........
TEMP............34 33 31 30 30 29 29 29 28 28 28 27
RH..............65 66 66 67 67 67 65 63 63 60 59 56
20 FT WIND DIR..NW NW NW NW NW W W W W W W W
20 FT WIND SPD..13 13 12 12 11 10 9 8 8 8 8 9
20 FT WIND GUST.18 18 18 17 16 16 16 17 17 17 17 17
SATURDAY
SKY/WEATHER.........SUNNY.
CWR.................0 PERCENT.
MAX TEMPERATURE.....31-35.
MIN HUMIDITY........47-51 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......WEST WINDS AROUND 10 MPH. GUSTS UP TO 20 MPH
IN THE MORNING DECREASING INTO THE AFTERNOON.
RIDGETOP...........WEST AROUND 25 MPH SHIFTING TO THE SOUTHWEST
LATE IN THE AFTERNOON.
MIXING HEIGHT.......INCREASING TO 3500 FT AGL IN THE AFTERNOON.
TRANSPORT WINDS.....WEST AROUND 25 MPH DECREASING TO 10 TO 15 MPH
LATE IN THE AFTERNOON.
TIME (MST) 6 AM 9 AM NOON 3 PM
SKY (%).........26 36 34 16
WEATHER COV.....
WEATHER TYPE....NONE NONE NONE NONE
TSTM COV........
TEMP............26 29 32 34
RH..............54 56 51 50
20 FT WIND......W 9G17 W 8G16 W 9G16 W 8G14
FORECASTER...MCKEOWN-ROBBIE/PALMQUIST
REQUESTED BY...MARIO PRETTY BOY
TYPE OF REQUEST...PRESCRIBED
.TAG 2527876.2/BYZ
.DELDT 12/19/25
.FORMATTERVERSION 2.0.0
.EMAIL MARIO.PRETTYBOY@BIA.GOV
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