875
FNUS75 KTFX 192226
FWSTFX
SPOT FORECAST FOR RUGBY...HELENA INTERAGENCY DISPATCH
NATIONAL WEATHER SERVICE GREAT FALLS MT
426 PM MDT WED AUG 19 2026
FORECAST IS BASED ON FORECAST START TIME OF 1600 MDT ON AUGUST 19.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
GENERALLY QUIET WEATHER CONDITIONS ARE EXPECTED FROM NOW THROUGH
FRIDAY AFTERNOON. THE NEXT CHANCE FOR STORMS COULD ARRIVE AS EARLY
AS LATE FRIDAY NIGHT, OTHERWISE STORMS ARE LOOKING LIKELY BY LATE
SATURDAY AFTERNOON. GENERALLY ABOVE NORMAL TEMPERATURES AND LOW
AFTERNOON HUMIDITY IS EXPECTED THROUGH FRIDAY.
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY (25-35 PERCENT).
CWR.................0 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MIN TEMPERATURE.....53-58.
MAX HUMIDITY........43-48 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......DOWNSLOPE AT 4 TO 8 MPH.
RIDGETOP...........NORTHWEST 10 TO 15 MPH DECREASING TO AROUND 5
MPH OVERNIGHT.
MIXING HEIGHT.......500 FT AGL.
TRANSPORT WINDS.....WEST 10 TO 15 MPH DECREASING TO AROUND 5 MPH
EARLY IN THE EVENING, THEN SHIFTING TO THE
NORTH LATE IN THE EVENING SHIFTING TO THE
SOUTHEAST OVERNIGHT SHIFTING TO THE SOUTH.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........30 54 61 72 66 47 32 22 23 20 20 21
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............75 74 70 66 64 62 61 60 59 58 57 56
RH..............32 36 41 42 42 44 44 44 44 45 48 48
20 FT WIND DIR..W NW NW NE E E E E SE SE SE SE
20 FT WIND SPD..5 5 0 0 0 0 5 0 5 5 5 5
20 FT WIND GUST.15 10 10 5 5 5 5 10 10 10
RIDGE WIND DIR..W NW NW NW NW NW NW NW W SW SW SW
RIDGE WIND SPD..15 10 10 10 10 10 5 5 5 5 5 10
MIX HGT (KFT)...7.0 4.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5
TRANSP WIND DIR.W NW NW W W N SE SE S S S S
TRANSP WIND SPD.15 10 5 5 5 5 5 5 5 10 10 10
THURSDAY
SKY/WEATHER.........SUNNY (15-25 PERCENT). PATCHY SMOKE EARLY IN
THE AFTERNOON.
CWR.................0 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....78-83.
MIN HUMIDITY........17-22 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......SOUTHEAST WINDS AROUND 5 MPH SHIFTING TO THE
WEST IN THE AFTERNOON.
RIDGETOP...........WEST 15 TO 20 MPH BECOMING AROUND 20 MPH LATE
IN THE AFTERNOON.
MIXING HEIGHT.......8000 FT AGL.
TRANSPORT WINDS.....SOUTH AROUND 10 MPH SHIFTING TO THE WEST LATE
IN THE MORNING.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........21 22 17 12 18 23 25 24 23 22 21 21
WEATHER COV..... PTY PTY
WEATHER TYPE.... SMK SMK
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............55 55 57 61 68 71 74 76 78 79 80 80
RH..............48 49 51 45 38 33 29 27 24 22 22 23
20 FT WIND DIR..SE SE S S SW SW SW W W W W W
20 FT WIND SPD..5 5 5 5 5 5 5 5 10 10 10 5
20 FT WIND GUST.10 10 10 10 10 15 15 15 15 15 20 20
RIDGE WIND DIR..SW SW W W W W W W W W W W
RIDGE WIND SPD..15 15 15 20 15 15 15 15 20 20 20 20
MIX HGT (KFT)...0.5 0.5 0.5 1.0 2.5 3.5 5.0 6.0 6.5 7.5 8.0 8.0
TRANSP WIND DIR.S S S S SW W W W W W W W
TRANSP WIND SPD.10 10 10 10 10 10 10 15 15 15 15 15
THURSDAY NIGHT
SKY/WEATHER.........MOSTLY CLEAR (20-30 PERCENT) THEN BECOMING
PARTLY CLOUDY (30-40 PERCENT).
CWR.................0 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MIN TEMPERATURE.....55-60.
MAX HUMIDITY........41-46 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......DOWNSLOPE 3 TO 6 MPH.
RIDGETOP...........NORTHWEST 10 TO 15 MPH SHIFTING TO THE WEST.
MIXING HEIGHT.......500 FT AGL.
TRANSPORT WINDS.....WEST 5 TO 10 MPH SHIFTING TO THE NORTHEAST
EARLY IN THE EVENING, THEN SHIFTING TO THE
SOUTHEAST IN THE LATE EVENING AND OVERNIGHT.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........21 21 21 29 29 29 53 53 53 37 37 37
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............80 78 74 69 67 65 63 62 62 61 59 59
RH..............23 28 32 34 34 36 36 36 36 37 39 40
20 FT WIND DIR..W W W SE SE SE SE SE SE SE SE SE
20 FT WIND SPD..5 5 5 0 0 0 0 0 0 0 0 0
20 FT WIND GUST.15 15 15 10 10 10 10 10 10 5 5 5
RIDGE WIND DIR..NW NW NW N N E SE S SW SW W W
RIDGE WIND SPD..15 15 10 5 5 5 5 0 0 0 5 5
MIX HGT (KFT)...7.5 3.0 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5
TRANSP WIND DIR.W W NE E SE SE SE SE SE SE SE SE
TRANSP WIND SPD.10 5 5 5 5 5 5 10 5 5 5 5
FRIDAY
SKY/WEATHER.........MOSTLY SUNNY (25-35 PERCENT).
CWR.................0 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....79-84.
MIN HUMIDITY........20-25 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......LIGHT WINDS BECOMING NORTHWEST AROUND 5 MPH IN
THE AFTERNOON.
RIDGETOP...........NORTHWEST AROUND 5 MPH SHIFTING TO THE
SOUTHWEST 0 TO 5 MPH EARLY IN THE MORNING, THEN
SHIFTING TO THE NORTHWEST AROUND 5 MPH LATE IN
THE AFTERNOON SHIFTING TO THE NORTHEAST LATE IN
THE AFTERNOON.
MIXING HEIGHT.......7000 FT AGL.
TRANSPORT WINDS.....NORTHWEST 5 TO 10 MPH.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........40 40 40 16 16 16 19 19 19 20 20 20
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............59 57 59 63 67 71 74 77 79 80 81 81
RH..............40 44 46 46 45 42 39 37 32 28 23 21
20 FT WIND DIR..N N N NW NW NW NW NW NW NW NW NW
20 FT WIND SPD..0 0 0 0 0 0 5 5 5 5 5 5
20 FT WIND GUST.5 5 5 5 5 5 10 10 10 15 15 15
RIDGE WIND DIR..N NW SW S S SW SW W W W NW NE
RIDGE WIND SPD..5 5 0 0 0 5 5 5 5 5 5 0
MIX HGT (KFT)...0.5 0.5 0.5 0.5 1.5 2.5 3.5 5.0 6.5 7.0 7.0 6.0
TRANSP WIND DIR.NW N N NW NW NW NW NW W W NW N
TRANSP WIND SPD.5 5 5 5 5 5 5 10 10 10 10 10
FORECASTER...BRUSDA
REQUESTED BY...RCH
TYPE OF REQUEST...WILDFIRE
.TAG 2620035.0/TFX
.DELDT 08/19/26
.FORMATTERVERSION 2.0.0
.EMAIL MTHDC@FIRENET.GOV
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page