286
FNUS75 KTFX 271901
FWSTFX
SPOT FORECAST FOR POWER PLANT...WFS
NATIONAL WEATHER SERVICE GREAT FALLS MT
101 PM MDT SAT JUN 27 2026
FORECAST IS BASED ON FORECAST START TIME OF 1300 MDT ON JUNE 27.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
REST OF TODAY
THIS AFTERNOON IT WILL BE WARM WITH SCATTERED SHOWERS AND
THUNDERSTORMS MOVING OVER THE FIRE BETWEEN 1400 AND 1800. THIS
AFTERNOON WINDS WILL BE AROUND 5 MPH WITH GUSTS UP TO 15 MPH.
TONIGHT THROUGH THE DAY ON SUNDAY THERE WILL BE SCATTERED SHOWERS
AND THUNDERSTORMS AROUND. ON SUNDAY IT WILL BE COOL WITH WINDS OF
15 - 20 MPH WITH GUSTS UP TO 35 MPH. ANY THUNDERSTORM THAT MOVES
OVER/OR NEAR THE FIRE WILL PRODUCE HEAVY RAINFALL, FREQUENT
LIGHTNING, AND GUSTY ERRATIC WINDS. THROUGH 1800 SUNDAY THERE IS
A 60% CHANCE FOR ONE HALF INCH OF RAIN AND A 35% CHANCE FOR ONE
INCH OF RAIN.
SKY/WEATHER.........PARTLY SUNNY (50-60 PERCENT).CHANCE OF SHOWERS AND
THUNDERSTORMS LATE IN THE AFTERNOON.
CWR.................15 PERCENT.
CHANCE OF THUNDER...29 PERCENT.
MAX TEMPERATURE.....71-76.
MIN HUMIDITY........45-50 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......NORTHWEST WINDS AROUND 5 MPH. GUSTY AND ERRATIC
WINDS EXPECTED NEAR THUNDERSTORMS LATE IN THE
AFTERNOON.
RIDGETOP...........NORTHWEST 5 TO 10 MPH.
MIXING HEIGHT.......5500 FT AGL.
TRANSPORT WINDS.....NORTHWEST AROUND 10 MPH SHIFTING TO THE NORTH
LATE IN THE AFTERNOON, THEN SHIFTING TO THE
NORTHWEST LATE IN THE AFTERNOON.
TIME (MDT) 1PM 2PM 3PM 4PM 5PM
SKY (%).........43 52 60 61 70
WEATHER COV..... SCH CHC CHC
WEATHER TYPE.... RW RW RW
TSTM COV........ SCH CHC CHC
CWR.............20 20 20 20 20
CHC OF THDR (%).10 10 20 30 30
TEMP............71 72 73 73 71
RH..............50 47 46 46 47
20 FT WIND DIR..NW NW N N NW
20 FT WIND SPD..5 5 5 5 5
20 FT WIND GUST.15 15 15 15 15
RIDGE WIND DIR..W NW NW NW NW
RIDGE WIND SPD..10 10 5 10 10
MIX HGT (KFT)...4.5 5.0 5.5 5.0 5.0
TRANSP WIND DIR.NW NW N N NW
TRANSP WIND SPD.10 10 10 5 10
TONIGHT
SKY/WEATHER.........CLOUDY (85-95 PERCENT). RAIN SHOWERS LIKELY IN
THE EVENING. CHANCE OF THUNDERSTORMS THROUGH
THE NIGHT. RAIN SHOWERS OVERNIGHT.
CWR.................50 PERCENT.
CHANCE OF THUNDER...34 PERCENT.
MIN TEMPERATURE.....53-58.
MAX HUMIDITY........85-90 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......WEST WINDS 5 TO 10 MPH. GUSTY AND ERRATIC WINDS
EXPECTED NEAR THUNDERSTORMS IN THE EVENING AND
OVERNIGHT. GUSTY AND ERRATIC WINDS EXPECTED
NEAR THUNDERSTORMS.
RIDGETOP...........NORTHWEST 10 TO 15 MPH INCREASING TO 15 TO 20
MPH IN THE LATE EVENING AND OVERNIGHT.
MIXING HEIGHT.......500 FT AGL.
TRANSPORT WINDS.....WEST 10 TO 15 MPH INCREASING TO AROUND 20 MPH
AFTER 3 AM.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........79 82 93 86 90 92 87 88 93 92 97 93
WEATHER COV.....LKY LKY CHC CHC CHC CHC LKY LKY LKY LKY DEF DEF
WEATHER TYPE....RW RW RW RW RW RW RW RW RW RW RW RW
TSTM COV........CHC CHC CHC SCH SCH SCH CHC CHC CHC SCH SCH SCH
CWR.............50 50 50 50 50 50 50 50 50 50 50 50
CHC OF THDR (%).30 30 30 20 20 20 30 30 30 20 20 20
TEMP............71 69 68 65 63 62 61 61 59 58 57 57
RH..............50 52 57 63 67 68 70 72 75 76 81 82
20 FT WIND DIR..W W W W W W W W W W W W
20 FT WIND SPD..5 5 5 5 5 5 10 10 10 10 10 10
20 FT WIND GUST.15 10 10 10 15 15 15 15 15 20 20 20
RIDGE WIND DIR..NW NW NW NW NW NW NW NW NW NW NW NW
RIDGE WIND SPD..10 15 15 15 20 20 20 15 15 15 15 20
MIX HGT (KFT)...3.5 2.0 1.5 1.0 1.0 0.5 0.5 1.0 1.5 1.5 1.5 1.5
TRANSP WIND DIR.W W W W W W W W W W W W
TRANSP WIND SPD.10 10 10 15 15 15 15 15 15 20 20 20
SUNDAY
SKY/WEATHER.........CLOUDY (85-95 PERCENT). RAIN IN THE MORNING,
THEN RAIN SHOWERS AND SLIGHT CHANCE OF
THUNDERSTORMS IN THE AFTERNOON.
CWR.................90 PERCENT DECREASING TO 60 PERCENT IN THE
AFTERNOON.
CHANCE OF THUNDER...20 PERCENT.
MAX TEMPERATURE.....61-66.
MIN HUMIDITY........65-70 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......WEST WINDS 10 TO 15 MPH WITH GUSTS TO AROUND 30
MPH INCREASING TO AROUND 20 MPH LATE IN THE
AFTERNOON. GUSTY AND ERRATIC WINDS EXPECTED
NEAR THUNDERSTORMS IN THE AFTERNOON.
RIDGETOP...........NORTHWEST 15 TO 20 MPH INCREASING TO WEST
AROUND 45 MPH.
MIXING HEIGHT.......2500 FT AGL.
TRANSPORT WINDS.....WEST 20 TO 25 MPH INCREASING TO AROUND 30 MPH
IN THE AFTERNOON.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........97 97 98 94 89 85 85 88 90 88 88 84
WEATHER COV.....LKY DEF DEF DEF LKY CHC LKY LKY LKY DEF DEF LKY
WEATHER TYPE....RN RN RN RN RN RN RW RW RW RW RW RW
TSTM COV........ SCH SCH SCH SCH SCH SCH
CWR.............90 90 90 90 90 90 60 60 60 60 60 60
CHC OF THDR (%).10 10 10 10 10 10 20 20 20 20 20 20
TEMP............56 55 55 56 58 59 60 61 61 61 62 61
RH..............83 86 86 86 81 77 75 71 70 71 69 69
20 FT WIND DIR..W W W W W W W W W W W W
20 FT WIND SPD..10 15 15 15 15 15 15 15 15 15 20 20
20 FT WIND GUST.20 20 25 25 30 30 30 30 30 30 30 30
RIDGE WIND DIR..NW NW NW W W W W W W W W W
RIDGE WIND SPD..20 20 15 15 20 30 40 40 35 35 40 45
MIX HGT (KFT)...1.0 1.5 1.5 1.5 2.0 2.0 2.5 2.5 2.5 2.5 2.5 2.5
TRANSP WIND DIR.W W W W W W W W W W W W
TRANSP WIND SPD.20 20 25 25 25 25 25 30 30 30 30 30
FORECASTER...GESELL
REQUESTED BY...LEWISTOWN DISPATCH
TYPE OF REQUEST...WILDFIRE
.TAG 2616323.0/TFX
.DELDT 06/27/26
.FORMATTERVERSION 2.0.0
.EMAIL MTLEC@FIRENET.GOV, TFX.OPS@NOAA.GOV
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