398
FNUS75 KTFX 081820
FWSTFX
SPOT FORECAST FOR BEAR GULCH...USFS
NATIONAL WEATHER SERVICE GREAT FALLS MT
1220 PM MDT TUE SEP 8 2026
FORECAST IS BASED ON IGNITION TIME OF 1200 MDT ON SEPTEMBER 09.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
NORTHWEST FLOW ALOFT WILL BECOME MORE ZONAL IN NATURE ACROSS THE
NORTHERN ROCKIES FROM WEDNESDAY AFTERNOON THROUGH EARLY THURSDAY
MORNING, WITH ZONAL FLOW THEN PERSIST THROUGH THE REMAINDER OF THE
DAY ON THURSDAY. THIS WILL LEAD TO INCREASING WESTERLY WINDS
ACROSS THE INCIDENT AREA, MOST NOTABLY ON THURSDAY; HOWEVER, BOTH
DAYS HAVE AN 80% CHANCE OF SEEING WIND GUSTS EXCEED 30 MPH. WITH
RESPECT TO THURSDAY THERE IS A 10% CHANCE THAT GUSTS COULD EXCEED
45 MPH ACROSS THE INCIDENT AREA.
WEDNESDAY
SKY/WEATHER.........SUNNY (10-20 PERCENT).
CWR.................0 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....72-77.
MIN HUMIDITY........21-26 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......WEST WINDS 10 TO 15 MPH, WITH GUSTS TO AROUND 30
MPH.
MIXING HEIGHT.......6000 FT AGL.
TRANSPORT WINDS.....WEST 20 TO 25 MPH.
TIME (MDT) 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........12 12 12 18 18 18
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0
CHC OF THDR (%).0 0 0 0 0 0
TEMP............64 68 72 72 73 74
RH..............36 31 27 26 24 25
20 FT WIND DIR..W W W W W W
20 FT WIND SPD..10 10 10 15 15 15
20 FT WIND GUST.25 25 25 30 30 30
MIX HGT (KFT)...4.5 5.5 6.0 6.0 6.0 5.5
TRANSP WIND DIR.W W W W W W
TRANSP WIND SPD.20 20 20 25 20 20
WEDNESDAY NIGHT
SKY/WEATHER.........MOSTLY CLEAR (15-25 PERCENT).
CWR.................0 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MIN TEMPERATURE.....51-56.
MAX HUMIDITY........40-45 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......WEST WINDS AROUND 10 MPH WITH GUSTS TO AROUND
25 MPH SHIFTING TO THE SOUTHWEST OVERNIGHT.
MIXING HEIGHT.......0 FT AGL.
TRANSPORT WINDS.....WEST 15 TO 20 MPH SHIFTING TO THE SOUTHWEST 10
TO 15 MPH EARLY IN THE EVENING.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........18 18 18 12 12 12 12 12 12 25 25 25
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
CHC OF THDR (%).0 0 0 0 0 0 0 0 0 0 0 0
TEMP............72 71 67 62 60 59 58 57 57 56 55 54
RH..............26 29 34 38 40 41 41 40 39 38 40 43
20 FT WIND DIR..W W W SW SW SW SW SW SW SW SW SW
20 FT WIND SPD..10 10 10 10 10 10 15 15 15 10 10 10
20 FT WIND GUST.25 25 25 20 20 20 20 20 20 15 15 15
MIX HGT (KFT)...5.0 2.5 1.0 0.5 0.1 0.5 0.5 0.5 0.5 0.5 0.5 0.5
TRANSP WIND DIR.W W W SW SW SW SW SW SW SW SW SW
TRANSP WIND SPD.20 15 10 10 10 10 15 15 15 10 10 10
THURSDAY
SKY/WEATHER.........SUNNY (5-15 PERCENT).
CWR.................0 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....79-84.
MIN HUMIDITY........14-19 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......SOUTHWEST WINDS 5 TO 10 MPH SHIFTING TO THE
WEST 10 TO 15 MPH LATE IN THE AFTERNOON. GUSTS
TO AROUND 30 MPH.
MIXING HEIGHT.......8500 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 10 TO 15 MPH INCREASING TO WEST 20 TO
25 MPH IN THE AFTERNOON.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........20 20 20 11 11 11 3 3 3 10 10 10
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
CHC OF THDR (%).0 0 0 0 0 0 0 0 0 0 0 0
TEMP............54 55 57 60 64 69 73 76 79 80 80 79
RH..............45 44 41 38 34 30 26 23 20 19 19 20
20 FT WIND DIR..SW SW SW SW SW SW W W W W W W
20 FT WIND SPD..10 10 10 5 5 5 5 5 5 15 15 15
20 FT WIND GUST.15 15 15 10 10 10 15 15 15 25 25 25
MIX HGT (KFT)...0.5 0.5 0.5 1.0 2.5 4.0 6.0 7.0 8.0 8.5 8.5 8.0
TRANSP WIND DIR.SW SW SW SW W W W W W W W W
TRANSP WIND SPD.10 10 10 10 15 15 20 25 25 25 25 25
FORECASTER...MOLDAN
REQUESTED BY...KYLE MILLER
TYPE OF REQUEST...PRESCRIBED
.TAG 2621433.0/TFX
.DELDT 09/08/26
.FORMATTERVERSION 2.0.0
.EMAIL KYLE.A.MILLER@USDA.GOV, TFX.OPS@NOAA.GOV
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