291
FNUS75 KTFX 271505
FWSTFX
SPOT FORECAST FOR SOUTH FORK HUMBUG...HIDC
NATIONAL WEATHER SERVICE GREAT FALLS MT
905 AM MDT THU AUG 27 2026
FORECAST IS BASED ON FORECAST START TIME OF 0900 MDT ON AUGUST 27.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
THERE'S AN ISOLATED CHANCE (20%) FOR SHOWERS AND THUNDERSTORMS
THIS MORNING, WITH BETTER CHANCES FOR SHOWERS AND THUNDERSTORMS
BETWEEN 1300 TO 1800 TODAY. THE MAIN HAZARDS WITH THUNDERSTORMS
WILL BE STRONG WIND GUSTS IN EXCESS OF 40 MPH AND SMALL HAIL.
CHANCES FOR WETTING RAIN ARE LOW (20%) WITH STORMS. WINDS TODAY
PREVAIL OUT OF THE SOUTHWEST 5 TO 15 MPH, SHIFTING TO THE WEST
BRIEFLY IN THE EVENING. SOUTHWEST TO WEST WINDS FRIDAY WILL BE A
LITTLE BIT BREEZIER FROM 10 TO 20 MPH. MODERATE HUMIDITY
RECOVERIES ARE EXPECTED OVERNIGHT.
REST OF TODAY
SKY/WEATHER.........MOSTLY SUNNY (45-55 PERCENT) THEN BECOMING
MOSTLY CLOUDY (65-75 PERCENT). SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS IN THE LATE MORNING
AND EARLY AFTERNOON. SLIGHT CHANCE OF DRY
THUNDERSTORMS LATE IN THE AFTERNOON.
CWR.................5 PERCENT.
CHANCE OF THUNDER...35 PERCENT.
MAX TEMPERATURE.....81-86.
MIN HUMIDITY........24-29 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......LIGHT WINDS BECOMING SOUTHWEST AROUND 5 MPH
WITH GUSTS TO AROUND 20 MPH IN THE AFTERNOON.
GUSTY AND ERRATIC WINDS EXPECTED NEAR
THUNDERSTORMS.
RIDGETOP...........SOUTHWEST AROUND 10 MPH INCREASING TO 15 TO 20
MPH.
MIXING HEIGHT.......10000 FT AGL.
TRANSPORT WINDS.....SOUTH 5 TO 10 MPH INCREASING TO SOUTHWEST 15 TO
20 MPH IN THE AFTERNOON.
TIME (MDT) 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........50 87 79 71 63 71 61 53 78
WEATHER COV.....SCH SCH SCH SCH SCH
WEATHER TYPE....RW RW RW RW RW
TSTM COV........SCH SCH SCH SCH SCH SCH SCH SCH
CWR.............10 10 10 10 10 10 10 10 10
CHC OF THDR (%).20 20 20 20 20 10 20 30 40
TEMP............59 67 72 75 78 80 80 81 79
RH..............57 51 43 39 37 34 33 33 35
20 FT WIND DIR..N S SW SW S S SW SW W
20 FT WIND SPD..0 0 0 5 5 5 5 5 5
20 FT WIND GUST.5 5 10 10 15 15 20 15 15
RIDGE WIND DIR..W SW S S S SW SW SW SW
RIDGE WIND SPD..10 10 10 10 15 20 20 20 15
MIX HGT (KFT)...0.5 1.0 1.5 3.0 5.5 9.5 10 9.0 7.0
TRANSP WIND DIR.S S S S S SW SW SW SW
TRANSP WIND SPD.5 5 10 10 15 20 20 20 20
TONIGHT
SKY/WEATHER.........MOSTLY CLOUDY (65-75 PERCENT) THEN BECOMING
PARTLY CLOUDY (20-30 PERCENT). CHANCE OF
SHOWERS AND THUNDERSTORMS EARLY IN THE EVENING.
PATCHY SMOKE IN THE LATE EVENING AND OVERNIGHT.
CWR.................15 PERCENT.
CHANCE OF THUNDER...25 PERCENT.
MIN TEMPERATURE.....47-52.
MAX HUMIDITY........62-67 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......LIGHT AND VARIABLE AROUND 5 MPH.
GUSTY AND ERRATIC WINDS EXPECTED NEAR
THUNDERSTORMS EARLY IN THE EVENING.
RIDGETOP...........WEST 10 TO 15 MPH DECREASING TO 5 TO 10 MPH IN
THE LATE EVENING AND OVERNIGHT, THEN SHIFTING
TO THE SOUTHWEST AROUND 15 MPH AFTER 3 AM.
MIXING HEIGHT.......500 FT AGL.
TRANSPORT WINDS.....SOUTH 10 TO 15 MPH SHIFTING TO THE WEST 5 TO 10
MPH IN THE LATE EVENING AND OVERNIGHT.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........73 70 39 23 22 13 14 23 14 10 13 43
WEATHER COV.....CHC PTY PTY PTY PTY PTY PTY PTY PTY PTY
WEATHER TYPE....RW SMK SMK SMK SMK SMK SMK SMK SMK SMK
TSTM COV........CHC
CWR.............10 10 10 10 10 10 0 0 0 0 0 0
CHC OF THDR (%).30 10 0 0 0 0 0 0 0 0 0 0
TEMP............78 76 69 65 63 61 60 58 57 55 52 52
RH..............40 45 51 58 60 62 62 64 65 67 68 67
20 FT WIND DIR..W W W W S S S S SW SW SW SW
20 FT WIND SPD..5 5 0 5 0 0 5 0 0 0 0 0
20 FT WIND GUST.15 10 10 10 10 5 5 5 5 5 5
RIDGE WIND DIR..W W W W W W W W SW SW SW SW
RIDGE WIND SPD..15 10 10 5 5 10 10 10 10 15 15 15
MIX HGT (KFT)...3.0 1.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5
TRANSP WIND DIR.S S S SW W W W W W W W SW
TRANSP WIND SPD.15 10 10 5 10 10 10 10 10 10 10 5
FRIDAY
SKY/WEATHER.........CLOUDY (85-95 PERCENT).
CWR.................0 PERCENT.
CHANCE OF THUNDER...2 PERCENT.
MAX TEMPERATURE.....75-80.
MIN HUMIDITY........24-29 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......LIGHT WINDS BECOMING WEST 5 TO 10 MPH IN THE
AFTERNOON.
RIDGETOP...........SOUTHWEST 15 TO 20 MPH DECREASING TO 10 TO 15
MPH IN THE AFTERNOON.
MIXING HEIGHT.......7000 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 5 TO 10 MPH INCREASING TO AROUND 15
MPH IN THE AFTERNOON.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........82 82 82 92 92 92 98 98 98 84 84 84
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............51 49 51 55 61 66 70 74 75 75 76 75
RH..............67 70 71 65 58 49 41 37 33 32 31 32
20 FT WIND DIR..SW SW SW SW SW SW SW SW SW W W W
20 FT WIND SPD..0 0 0 0 0 0 5 5 5 10 10 10
20 FT WIND GUST.5 5 5 10 10 10 15 15 15 20 20 20
RIDGE WIND DIR..SW SW SW SW SW SW SW SW SW SW SW W
RIDGE WIND SPD..15 15 20 20 15 15 10 10 15 15 15 15
MIX HGT (KFT)...0.5 0.5 0.5 0.5 1.0 2.0 3.5 5.0 7.0 7.0 7.0 5.5
TRANSP WIND DIR.SW SW SW SW SW SW SW SW SW SW W W
TRANSP WIND SPD.5 5 5 5 10 10 10 15 15 15 15 15
FORECASTER...WILSON
REQUESTED BY...RCH
TYPE OF REQUEST...WILDFIRE
.TAG 2620698.0/TFX
.DELDT 08/27/26
.FORMATTERVERSION 2.0.0
.EMAIL STEPHEN.JENKINS@USDA.GOV,MTHDC@FIRENET.GOV,NICHOLAS.BOUCHER@USDA.GOV, TFX.OPS@NOAA.GOV
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