670
FNUS75 KBYZ 051218
FWSBYZ
SPOT FORECAST FOR KNOWLTON PILE BURN...BLM
NATIONAL WEATHER SERVICE BILLINGS MT
518 AM MST FRI DEC 5 2025
FORECAST IS BASED ON IGNITION TIME OF 0749 MST ON DECEMBER 05.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
PLEASE CONTACT OUR OFFICE IF YOU HAVE QUESTIONS OR CONCERNS WITH
THIS FORECAST.
DISCUSSION
EXPECT SCATTERED LIGHT SNOW SHOWERS AND BREEZY NORTHWEST WINDS
(GUSTING NEAR 25 MPH) AT THE BURN SITE THIS MORNING. SNOW AND WIND
WILL DIMINISH THIS AFTERNOON, WITH WINDS SHIFTING EASTERLY IN THE
EVENING. THERE WILL BE A PERIOD OF SNOW (1-2" ACCUMULATION) LATE
TONIGHT THROUGH SATURDAY MORNING, AND DURING THIS TIME VISIBILITY
WILL BE LIMITED. WINDS SHOULD REMAIN EASTERLY TOMORROW.
TODAY
SKY/WEATHER.........MOSTLY CLOUDY. SCATTERED LIGHT SNOW SHOWERS IN
THE MORNING.
CWR.................5 PERCENT.
MAX TEMPERATURE.....33-35.
MIN HUMIDITY........85-89 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......NORTHWEST 8-16 MPH GUSTING NEAR 25 MPH IN THE
MORNING, THEN DECREASING AND SHIFTING TO NORTHEAST
4-8 MPH IN THE AFTERNOON. VARIABLE WIND DIRECTIONS
POSSIBLE AFTER 3PM.
RIDGETOP...........NORTHWEST 15-25 MPH DECREASING TO NORTH 5-10 MPH
IN THE AFTERNOON.
MIXING HEIGHT.......INCREASING TO 2000 FT AGL IN THE AFTERNOON.
TRANSPORT WINDS.....NORTHWEST 18 MPH DECREASING TO 7 MPH BY LATE
AFTERNOON.
TIME (MST) 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........93 91 90 93 88 86 89 82 78 72 67
WEATHER COV.....SCT SCT SCT ISO ISO
WEATHER TYPE....SW SW SW SW SW
TSTM COV........
TEMP............31 30 31 32 34 34 34 32 31 30 28
RH..............95 95 93 92 89 88 87 88 89 91 93
20 FT WIND DIR..W W NW NW NW NW NW NW NW N NE
20 FT WIND SPD..14 13 13 13 12 11 9 7 6 4 4
20 FT WIND GUST.23 21 20 20 19 18 16 14 10 8 6
TONIGHT
SKY/WEATHER.........MOSTLY CLOUDY. SNOW LIKELY OVERNIGHT.
CWR.................35 PERCENT.
MIN TEMPERATURE.....16-20.
MAX HUMIDITY........ABOVE 95 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......SOUTHEAST 4-8 MPH IN THE EVENING, BECOMING
EAST 10-15 MPH OVERNIGHT.
RIDGETOP...........SOUTHEAST 5-10 MPH BECOMING EAST 10-18 MPH.
MIXING HEIGHT.......DECREASING TO 300 FT AGL OVERNIGHT.
TRANSPORT WINDS.....EAST 10 MPH.
TIME (MST) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........63 67 72 80 82 84 87 94 97 99 99 100
WEATHER COV..... SCH SCH CHC CHC LKY LKY
WEATHER TYPE.... SN SN SN SN SN SN
TSTM COV........
TEMP............26 24 23 22 21 21 21 22 21 20 19 18
RH..............99 100 100 100 100 97 97 95 92 95 94 95
20 FT WIND DIR..SE SE SE SE SE SE E E E E E E
20 FT WIND SPD..4 4 5 5 6 6 7 8 9 10 10 10
20 FT WIND GUST.6 7 8 8 10 11 11 12 14 15 15 15
SATURDAY
SKY/WEATHER.........CLOUDY. SNOW IN THE MORNING, TAPERING TO
SCATTERED LIGHT SNOW SHOWERS IN THE AFTERNOON.
CWR.................40 PERCENT.
MAX TEMPERATURE.....24-28.
MIN HUMIDITY........88-92 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......NORTHEAST TO EAST 5-10 MPH GUSTING TO 15 MPH.
RIDGETOP...........NORTHEAST TO EAST 5-15 MPH.
MIXING HEIGHT.......INCREASING TO 1200 FT AGL IN THE AFTERNOON.
TRANSPORT WINDS.....EAST 10 MPH.
TIME (MST) 6 AM 9 AM NOON 3 PM
SKY (%).........100 95 90 85
WEATHER COV.....DEFNTE DEFNTE SCT SCT
WEATHER TYPE....SNOW SNOW SNSHWR SNSHWR
TSTM COV........
TEMP............19 21 24 26
RH..............98 95 93 90
20 FT WIND......E 7G14 E 7G12 NE 8G14 NE 6G11
FORECASTER...LESTER
REQUESTED BY...SHELDON DANFORTH
TYPE OF REQUEST...PRESCRIBED
.TAG 2527026.1/BYZ
.DELDT 12/05/25
.FORMATTERVERSION 2.0.0
.EMAIL SDANFORTH@BLM.GOV
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