585
FNUS75 KBYZ 121018
FWSBYZ
SPOT FORECAST FOR HI LINE...USWFS
NATIONAL WEATHER SERVICE BILLINGS MT
418 AM MDT SUN APR 12 2026
FORECAST IS BASED ON IGNITION TIME OF 0700 MDT ON APRIL 12.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
PLEASE CONTACT OUR OFFICE IF YOU HAVE QUESTIONS
OR CONCERNS WITH THIS FORECAST.
DISCUSSION
A BIT COOLER TEMPERATURES AND SLIGHTLY HIGHER RH CAN BE EXPECTED
AT THE BURN SITE TODAY. WEST TO NORTHWEST WINDS WILL PREVAIL MOST
OF THE DAY, TURNING OUT OF THE NORTH AND NORTHEAST LATE IN THE
DAY. ANOTHER DISTURBANCE LIFTING THROUGH THE REGION WILL BRING
CHANCES FOR SHOWERS AND THUNDERSTORMS STARTING LATE THIS AFTERNOON
AND CONTINUING THROUGH THE EVENING. THE BEST TIMING FOR
THUNDERSTORMS IS BETWEEN 1600 TO 2100 MDT, WITH GUSTY AND ERRATIC
WINDS OF 30-50 MPH POSSIBLE WITH THUNDERSTORMS. MONDAY WILL BRING
TEMPERATURES IN THE 60S, NORTHWEST WINDS AND MODERATE CHANCES FOR
SHOWERS, GREATEST IN THE AFTERNOON. THE PRECIPITATION POTENTIAL
HAS DECREASED FROM PREVIOUS FORECASTS, WITH THE CURRENT CWR NEAR
20%, THOUGH LOCALLY HIGHER AMOUNTS ARE POSSIBLE IF A STRONGER
SHOWER MOVES OVERHEAD. MODERATE TO GOOD RH RECOVERIES CAN BE
EXPECTED TONIGHT AND MONDAY NIGHT.
TODAY
SKY/WEATHER.........MOSTLY SUNNY. SLIGHT CHANCE OF RAIN SHOWERS
AND THUNDERSTORMS LATE IN THE AFTERNOON.
CWR.................LESS THAN 10 PERCENT.
CHANCE OF LIGHTNING.15 PERCENT LATE IN THE AFTERNOON.
MAX TEMPERATURE.....66-70.
MIN HUMIDITY........22-28 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......WEST TO NORTHWEST WINDS 6 TO 12 MPH WITH GUSTS
UP TO 20 MPH IN THE MORNING, BECOMING NORTH TO
NORTHEAST LATE IN THE AFTERNOON. GUSTY AND
ERRATIC WINDS EXPECTED NEAR THUNDERSTORMS.
RIDGETOP...........WEST TO NORTHWEST 10 TO 20 MPH IN THE MORNING,
BECOMING NORTH TO NORTHEAST 8 TO 16 MPH LATE
IN THE AFTERNOON.
MIXING HEIGHT.......INCREASING TO 8700 FT AGL IN THE AFTERNOON.
TRANSPORT WINDS.....WEST 10 TO 20 MPH.
TIME (MDT) 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........11 14 12 4 5 9 11 12 23 28 31
WEATHER COV..... SCH SCH
WEATHER TYPE.... RW RW
TSTM COV........ SCH SCH
CHC OF LTNG (%).0 0 0 0 0 0 0 0 10 15 15
TEMP............47 48 50 56 59 63 65 66 68 67 67
RH..............68 64 61 53 46 39 34 28 24 25 25
20 FT WIND DIR..NW NW NW NW W W W W W NW NE
20 FT WIND SPD..11 11 11 11 11 10 8 6 6 6 6
20 FT WIND GUST.16 18 19 18 16 14 13 12 12 12 12
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY. CHANCE OF RAIN SHOWERS
AND SLIGHT CHANCE OF THUNDERSTORMS IN THE
EVENING, THEN SLIGHT CHANCE OF RAIN SHOWERS
OVERNIGHT.
CWR.................10 PERCENT.
CHANCE OF LIGHTNING.15 PERCENT.
MIN TEMPERATURE.....39-44.
MAX HUMIDITY........74-79 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......NORTHEAST WINDS 6 TO 12 MPH SHIFTING TO THE WEST
OVERNIGHT. GUSTY AND ERRATIC WINDS EXPECTED
NEAR THUNDERSTORMS.
RIDGETOP...........NORTHEAST 8 TO 16 MPH, BECOMING NORTHWEST AROUND
10 MPH OVERNIGHT.
MIXING HEIGHT.......DECREASING TO 200 FT AGL OVERNIGHT.
TRANSPORT WINDS.....NORTHEAST 10 TO 16 MPH IN THE EVENING, BECOMING
NORTHWEST AROUND 10 MPH OVERNIGHT.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........41 43 60 61 56 55 56 55 27 48 34 28
WEATHER COV.....SCH SCH CHC CHC SCH SCH SCH SCH
WEATHER TYPE....RW RW RW RW RW RW RW RW
TSTM COV........SCH SCH SCH SCH
CHC OF LTNG (%).15 15 15 15 10 10 5 5 0 0 0 0
TEMP............67 62 58 54 52 52 51 49 47 46 43 43
RH..............25 33 42 51 55 60 64 68 71 73 75 76
20 FT WIND DIR..ENE ENE NE NE NE NE NE N NW W W W
20 FT WIND SPD..6 6 6 6 6 6 6 6 6 6 6 6
20 FT WIND GUST.12 11 11 11 11 10 10 10 10 10 10 10
MONDAY
SKY/WEATHER.........PARTLY SUNNY. SLIGHT CHANCE OF RAIN SHOWERS IN
THE MORNING, THEN CHANCE OF RAIN SHOWERS IN THE
AFTERNOON.
CWR.................20 PERCENT.
CHANCE OF LIGHTNING.10 PERCENT.
MAX TEMPERATURE.....59-64.
MIN HUMIDITY........26-31 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......WEST TO NORTHWEST WINDS 6 TO 12 MPH. GUSTS 20
TO 25 MPH IN THE LATE MORNING AND AFTERNOON.
RIDGETOP...........NORTHWEST 10 TO 20 MPH WITH GUSTS TO 25 MPH.
MIXING HEIGHT.......INCREASING TO 7400 FT AGL IN THE AFTERNOON.
TRANSPORT WINDS.....NORTHWEST 15 TO 25 MPH.
TIME (MDT) 6 AM 9 AM NOON 3 PM
SKY (%).........44 50 67 67
WEATHER COV.....S CHC S CHC CHANCE CHANCE
WEATHER TYPE....RNSHWR RNSHWR RNSHWR RNSHWR
TSTM COV........
CHC OF LTNG (%).10 10 10 10
TEMP............42 48 56 60
RH..............78 64 39 28
20 FT WIND......W 6G11 NW 9G14 NW 12G23 NW 12G21
FORECASTER...PALMQUIST
REQUESTED BY...JARID GIBSON
TYPE OF REQUEST...PRESCRIBED
.TAG 2609200.3/BYZ
.DELDT 04/12/26
.FORMATTERVERSION 2.0.0
.EMAIL JGIBSON@BLM.GOV,JARID.G7@GMAIL.COM,MTMCC@FIRENET.GOV
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