980
FNUS75 KBYZ 201139
FWSBYZ
SPOT FORECAST FOR HORN CREEK 2 PILE BURN...NORTHERN CHEYENNE AGENCY
NATIONAL WEATHER SERVICE BILLINGS MT
439 AM MST SAT DEC 20 2025
FORECAST IS BASED ON IGNITION TIME OF 0800 MST ON DECEMBER 20.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
PLEASE CONTACT OUR OFFICE IF YOU HAVE QUESTIONS
OR CONCERNS WITH THIS FORECAST.
DISCUSSION
A SUNNY AND WARM DAY IS EXPECTED TODAY WITH A SOUTHWESTERLY
BREEZE. OVERNIGHT TONIGHT CLOUDS GRADUALLY BUILD IN RESULTING IN
CLOUDY SKIES BY EARLY MORNING. WHILE NO PRECIPITATION IS FORECAST
SUNDAY, OVERCAST SKIES WILL KEEP RH VALUES HIGH, WINDS LIGHT, AND
THE MIXING HEIGHT VERY LOW.
TODAY
SKY/WEATHER.........MOSTLY SUNNY.
CWR.................0 PERCENT.
MAX TEMPERATURE.....32-35.
MIN HUMIDITY........51-55 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......WEST WINDS UP TO 10 MPH. GUSTS UP TO 20 MPH
THIS MORNING.
RIDGETOP...........WEST AROUND 30 MPH.
MIXING HEIGHT.......INCREASING TO 5100 FT AGL IN THE AFTERNOON.
TRANSPORT WINDS.....WEST 15 TO 20 MPH INCREASING TO 20 TO 25 MPH
IN THE AFTERNOON.
TIME (MST) 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........46 42 48 41 23 15 13 7 7 17
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
TEMP............27 30 31 32 33 34 35 33 33 31
RH..............60 58 54 54 53 52 53 53 58 60
20 FT WIND DIR..W W W W W W W W W W
20 FT WIND SPD..8 8 9 9 8 8 8 7 6 5
20 FT WIND GUST.16 17 16 16 16 14 14 14 11 10
TONIGHT
SKY/WEATHER.........MOSTLY CLOUDY.
CWR.................0 PERCENT.
MIN TEMPERATURE.....25-29.
MAX HUMIDITY........56-60 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......SOUTHWEST WINDS UP TO 12MPH.
RIDGETOP...........WEST AROUND 30 MPH.
MIXING HEIGHT.......DECREASING TO 0 FT AGL OVERNIGHT.
TRANSPORT WINDS.....SOUTHWEST 10 TO 15 MPH SHIFTING TO THE SOUTH
AFTER 3 AM.
TIME (MST) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........18 27 33 33 31 24 24 28 37 33 46 61
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
TEMP............29 29 29 29 28 28 28 27 28 28 28 29
RH..............61 59 60 59 59 59 59 59 57 55 53 51
20 FT WIND DIR..SW SW SW SW SW S S S S S S S
20 FT WIND SPD..5 6 6 6 6 6 6 6 6 6 6 6
20 FT WIND GUST.10 10 11 11 11 11 11 11 11 11 11 11
SUNDAY
SKY/WEATHER.........MOSTLY CLOUDY.
CWR.................0 PERCENT.
MAX TEMPERATURE.....36-40.
MIN HUMIDITY........53-57 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......SOUTH WINDS UP TO 8 MPH.
RIDGETOP...........SOUTH AROUND 15 MPH.
MIXING HEIGHT.......INCREASING TO 100 FT AGL IN THE AFTERNOON.
TRANSPORT WINDS.....SOUTH 8 TO 12 MPH.
TIME (MST) 6 AM 9 AM NOON 3 PM
SKY (%).........62 74 86 89
WEATHER COV.....
WEATHER TYPE....NONE NONE NONE NONE
TSTM COV........
TEMP............29 31 37 37
RH..............49 52 56 65
20 FT WIND......S 6G10 S 5G10 S 5G10 S 5G8
FORECASTER...MCKEOWN-ROBBIE/TESAR
REQUESTED BY...MARIO PRETTY BOY
TYPE OF REQUEST...PRESCRIBED
.TAG 2527876.3/BYZ
.DELDT 12/20/25
.FORMATTERVERSION 2.0.0
.EMAIL MARIO.PRETTYBOY@BIA.GOV
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