401
FNUS75 KTFX 081136
FWSTFX
SPOT FORECAST FOR TWO CALF UNIT A RX...BLM
NATIONAL WEATHER SERVICE GREAT FALLS MT
536 AM MDT WED APR 8 2026
FORECAST IS BASED ON IGNITION TIME OF 1800 MDT ON APRIL 08.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
NORTH TO NORTHWESTERLY WINDS DIMINISH BY THIS EVENING AND THEN
BECOME LIGHT EASTERLY. ANOTHER TROUGH AND COLD FRONT MOVE IN LATE
TONIGHT INTO THURSDAY MORNING, BUT THE WINDS WITH THIS ONE WILL BE
MUCH LIGHTER. WINDS GENERALLY REMAIN ON THE LIGHT SIDE UNTIL
FRIDAY WHEN EAST TO SOUTHEASTERLY BREEZES INCREASE TO THE 10 TO 20
MPH RANGE.
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY (30-40 PERCENT) THEN BECOMING
MOSTLY CLOUDY (65-75 PERCENT). SLIGHT CHANCE OF
SNOW SHOWERS LATE.
CWR.................5 PERCENT.
CHANCE OF THUNDER...1 PERCENT.
MIN TEMPERATURE.....29-34.
MAX HUMIDITY........60-65 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......NORTHERLY WINDS 5 TO 15 MPH BECOMING EASTERLY
AROUND 5 TO 10 MPH.
MIXING HEIGHT.......500 FT AGL.
TRANSPORT WINDS.....NORTHWEST AROUND 10 TO 15 MPH BECOMING EASTERLY
AROUND 10 MPH
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........17 27 23 22 26 28 48 57 82 73 77 79
WEATHER COV..... SCH
WEATHER TYPE.... SN
TSTM COV........
CWR.............0 0 0 0 0 0 10 10 10 10 10 10
CHC OF THDR (%).0 0 0 0 0 0 0 0 0 0 0 0
TEMP............50 47 43 39 37 35 34 33 32 32 31 31
RH..............31 35 42 46 50 53 57 58 62 61 65 64
20 FT WIND DIR..NW N NE E E SE SE SE E E E E
20 FT WIND SPD..5 5 5 5 5 5 5 5 5 5 0 0
20 FT WIND GUST.15 10 10 10 10 10 10 10 10 10 5 5
MIX HGT (KFT)...5.0 4.0 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5
TRANSP WIND DIR.NW NW NE E E E SE SE SE SE E E
TRANSP WIND SPD.10 10 5 10 10 10 10 10 10 10 10 10
THURSDAY
SKY/WEATHER.........MOSTLY CLOUDY (80-90 PERCENT) THEN BECOMING
MOSTLY SUNNY (35-45 PERCENT). CHANCE OF SNOW
SHOWERS IN THE MORNING.
CWR.................5 PERCENT.
CHANCE OF THUNDER...2 PERCENT.
MAX TEMPERATURE.....53-58.
MIN HUMIDITY........26-31 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......LIGHT AND VARIABLE WINDS BECOMING NORTHWEST
AROUND 5 TO 10 MPH IN THE LATE MORNING AND AFTERNOON.
MIXING HEIGHT.......6500 FT AGL.
TRANSPORT WINDS.....NORTHEAST 5 TO 10 MPH SHIFTING TO THE NORTHWEST
LATE IN THE AFTERNOON.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........86 86 86 50 50 50 32 32 32 35 35 35
WEATHER COV.....CHC CHC CHC CHC CHC CHC
WEATHER TYPE....SN SN SN SN SN SN
TSTM COV........
CWR.............10 10 10 10 10 10 0 0 0 0 0 0
CHC OF THDR (%).0 0 0 0 0 0 0 0 0 0 0 0
TEMP............31 32 33 36 39 42 45 48 50 52 54 54
RH..............66 68 65 60 56 51 47 43 39 36 32 30
20 FT WIND DIR..N N N NW NW NW NW NW NW NW NW NW
20 FT WIND SPD..0 0 0 5 5 5 5 5 5 5 5 5
20 FT WIND GUST.5 5 5 10 10 10 10 10 10 10 10 10
MIX HGT (KFT)...0.5 1.0 1.0 1.5 2.5 4.0 5.0 5.5 6.0 6.0 6.5 6.5
TRANSP WIND DIR.NE NE N N N N N NW NW NW NW NW
TRANSP WIND SPD.5 5 10 10 10 15 15 10 10 10 10 5
THURSDAY NIGHT
SKY/WEATHER.........MOSTLY CLEAR (5-15 PERCENT).
CWR.................0 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MIN TEMPERATURE.....29-34.
MAX HUMIDITY........68-73 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......NORTHERLY WINDS 5 TO 10 MPH BECOMING EAST TO SOUTHEAST
AROUND 5 TO 10 MPH.
MIXING HEIGHT.......0 FT AGL.
TRANSPORT WINDS.....NORTHERLY AROUND 5 TO 10 MPH BECOMING SOUTHEAST
10 TO 15 MPH.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........13 13 13 9 9 9 7 7 7 8 8 8
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 51 47 43 41 39 38 36 35 33 32 31
RH..............30 34 40 46 50 53 56 60 64 67 71 74
20 FT WIND DIR..N N N E E E SE SE SE SE SE SE
20 FT WIND SPD..5 5 5 5 5 5 5 5 5 5 5 5
20 FT WIND GUST.10 10 10 10 10 10 10 10 10 10 10 10
MIX HGT (KFT)...5.5 4.0 2.0 0.5 0.1 0.1 0.5 0.5 0.5 0.5 0.5 0.5
TRANSP WIND DIR.NW N E SE SE SE SE SE SE SE SE SE
TRANSP WIND SPD.5 5 5 5 10 10 10 15 15 15 15 15
FRIDAY
SKY/WEATHER.........SUNNY (15-25 PERCENT).
CWR.................0 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....65-70.
MIN HUMIDITY........24-29 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......SOUTHEAST WINDS 5 TO 10 MPH INCREASING TO
AROUND 15 MPH LATE IN THE AFTERNOON.
MIXING HEIGHT.......4500 FT AGL.
TRANSPORT WINDS.....SOUTHEAST 15 TO 25 MPH.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........10 10 10 10 10 10 15 15 15 26 26 26
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............31 33 35 39 44 51 56 60 63 64 66 67
RH..............74 70 63 55 48 41 36 32 30 29 28 27
20 FT WIND DIR..SE SE SE SE SE SE SE SE SE SE SE SE
20 FT WIND SPD..5 5 5 5 5 5 10 10 10 15 15 15
20 FT WIND GUST.10 10 10 15 15 15 20 20 20 25 25 25
MIX HGT (KFT)...0.5 0.5 1.0 1.5 2.0 3.0 3.5 4.0 4.0 4.0 4.5 4.5
TRANSP WIND DIR.SE SE SE SE SE SE SE SE SE SE SE SE
TRANSP WIND SPD.15 15 20 20 20 20 20 20 20 20 20 20
FORECASTER...GREELY
REQUESTED BY...JAY PETERMAN
TYPE OF REQUEST...PRESCRIBED
.TAG 2609513.0/TFX
.DELDT 04/08/26
.FORMATTERVERSION 2.0.0
.EMAIL JPETERMAN@BLM.GOV, TFX.OPS@NOAA.GOV
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page