402
FNUS75 KBYZ 221024
FWSBYZ
SPOT FORECAST FOR SHENANGO ADMIN PILE...USFS
NATIONAL WEATHER SERVICE BILLINGS MT
324 AM MST MON DEC 22 2025
FORECAST IS BASED ON IGNITION TIME OF 0900 MST ON DECEMBER 22.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
PLEASE CONTACT OUR OFFICE IF YOU HAVE QUESTIONS
OR CONCERNS WITH THIS FORECAST.
DISCUSSION
UNSETTLED CONDITIONS ARE EXPECTED ACROSS THE BURN SITE TODAY WITH
A MIX OF RAIN AND SNOW SHOWERS EXPECTED, MAINLY THROUGH THE
MORNING. WINDS WILL BE TERRAIN DRIVEN AND LIGHT EARLY TODAY, BUT
SOUTHWESTERLY BY MIDDAY. A BIT OF FREEZING RAIN COULD ALSO OCCUR
(>10% CHANCE). CHANCE OF WETTING PRECIPITATION IS NEARLY 35% TODAY
BEFORE DECREASING TO ABOUT 15% TONIGHT. THINGS SHOULD DRY OUT BY
MIDDAY TUESDAY WITH WARMER TEMPS AS SOUTHERLY WINDS INCREASE. BT
TODAY
SKY/WEATHER.........RAIN/SNOW LIKELY AND SLIGHT CHANCE OF
FREEZING RAIN EARLY IN THE MORNING, THEN CHANCE OF RAIN
AND SNOW IN THE AFTERNOON.
CWR.................34 PERCENT.
MAX TEMPERATURE.....43-48.
MIN HUMIDITY........57-64 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......VARIABLE WIND UNDER 10 MPH, BECOMING SOUTHWEST 5-8 MPH WITH
GUSTS TO 17 MPH IN THE LATE MORNING AND AFTERNOON.
RIDGETOP........... WEST AROUND 25-35 MPH BECOMING SOUTHWEST AROUND 25
MPH LATE IN THE AFTERNOON.
MIXING HEIGHT.......2300 FT AGL EARLY IN THE MORNING INCREASING TO
5400 FT AGL IN THE AFTERNOON.
TRANSPORT WINDS.....SOUTHWEST 14 TO 23 MPH INCREASING TO 26 TO 31
MPH EARLY IN THE AFTERNOON, THEN DECREASING TO
15 TO 20 MPH LATE IN THE AFTERNOON.
TIME (MST) 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........75 73 86 74 70 64 65 76 83
WEATHER COV.....LKY CHC CHC CHC CHC SCH CHC CHC CHC
WEATHER TYPE....RS RN RN RN RN RS RS RS RS
TSTM COV........
TEMP............36 39 41 44 46 46 45 43 39
RH..............82 75 70 67 60 61 59 66 72
20 FT WIND DIR..SW SW SW SW SW SW SW S SE
20 FT WIND SPD..5 5 6 6 6 5 5 5 4
20 FT WIND GUST.12 16 17 17 17 14 14 13 10
TONIGHT
SKY/WEATHER.........MOSTLY CLOUDY. SLIGHT CHANCE OF RAIN SHOWERS IN
THE EVENING. CHANCE OF RAIN/SNOW SHOWERS
THROUGH THE NIGHT.
CWR.................28 PERCENT DECREASING TO 15 PERCENT EARLY IN
THE MORNING.
MIN TEMPERATURE.....33-37.
MAX HUMIDITY........79-88 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......LIGHT AND TERRAIN DRIVEN WIND UNDER 10 MPH. LATE IN THE EVENING BECOMING LIGHT.
RIDGETOP...........SOUTHWEST 25 TO 32 MPH.
MIXING HEIGHT.......2100 FT AGL EARLY IN THE EVENING DECREASING TO
1600 FT AGL OVERNIGHT.
TRANSPORT WINDS.....SOUTHWEST 12 TO 16 MPH.
TIME (MST) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........82 75 78 68 71 69 63 61 64 60 77 84
WEATHER COV.....SCH SCH SCH SCH CHC SCH CHC CHC
WEATHER TYPE....RS RS RS RS RW RW RW RW
TSTM COV........
TEMP............38 37 37 37 37 37 38 38 38 37 38 38
RH..............76 74 72 74 73 72 74 72 72 73 75 77
20 FT WIND DIR..SE SE SE SE S S S SE SE S S S
20 FT WIND SPD..4 5 5 5 4 5 5 5 5 4 4 4
20 FT WIND GUST.11 13 13 13 12 13 13 12 12 12 12 13
TUESDAY
SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING MOSTLY SUNNY.
SLIGHT CHANCE OF SNOW SHOWERS EARLY IN THE
MORNING. CHANCE OF RAIN SHOWERS IN THE MORNING.
CWR.................12 PERCENT DECREASING TO 0 PERCENT LATE IN THE
AFTERNOON.
MAX TEMPERATURE.....47-53.
MIN HUMIDITY........44-50 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......SOUTH WINDS 6-12 MPH. GUSTS UP TO 21 MPH IN
THE LATE MORNING AND AFTERNOON.
RIDGETOP...........SOUTHWEST AROUND 35 MPH.
MIXING HEIGHT.......1600 FT AGL EARLY IN THE MORNING INCREASING TO
4400 FT AGL IN THE AFTERNOON.
TRANSPORT WINDS.....SOUTHWEST 12 TO 16 MPH INCREASING TO 16 TO 26
MPH IN THE LATE MORNING AND AFTERNOON.
TIME (MST) 6 AM 9 AM NOON 3 PM
SKY (%).........87 62 77 62
WEATHER COV.....CHANCE CHANCE
WEATHER TYPE....RNSHWR RNSHWR NONE NONE
TSTM COV........
TEMP............38 40 50 51
RH..............77 75 53 49
20 FT WIND......S 5G12 S 6G14 S 8G16 S 9G20
FORECASTER...TESAR
REQUESTED BY...TYLER KUHN
TYPE OF REQUEST...PRESCRIBED
.TAG 2527959.0/BYZ
.DELDT 12/22/25
.FORMATTERVERSION 2.0.0
.EMAIL LIAM.T.DILLAWAY@USDA.GOV,TYLER.KUHN@USDA.GOV
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