953
FNUS75 KTFX 212314
FWSTFX
SPOT FORECAST FOR TWO CALF RX...BLM
NATIONAL WEATHER SERVICE GREAT FALLS MT
514 PM MDT TUE APR 21 2026
FORECAST IS BASED ON IGNITION TIME OF 1700 MDT ON APRIL 21.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
...HIGH WIND WATCH IN EFFECT FROM LATE WEDNESDAY NIGHT THROUGH
THURSDAY AFTERNOON...
DISCUSSION
TWO SPRING WEATHER SYSTEMS WILL MOVE THROUGH THE REGION FROM WEDNESDAY
AFTERNOON TO FRIDAY MORNING. PRECIPITATION WILL PREDOMINATELY COME IN
THE FORM OF RAIN WITH A SLIGHT CHANCE FOR A RAIN/SNOW MIX EARLY
THURSDAY MORNING. THERE IS A CHANCE FOR ISOLATED AFTERNOON THUNDERSTORMS
WEDNESDAY AFTERNOON WITH THE MAIN THREAT BEING LIGHTNING AND GUSTY,
ERRATIC WINDS.
WINDS WILL START TO PICK UP AFTER 8 AM ON WEDNESDAY WITH THE
STRONGEST WINDS EXPECTED WEDNESDAY NIGHT THROUGH THURSDAY MORNING.
WINDS WILL START OFF OUT OF THE SOUTHWEST AND SWITCH TO OUT OF THE
NORTHWEST BY EARLY THURSDAY MORNING AS THE COLD FRONT PUSHES THROUGH.
IN EXPOSED AREAS, SUSTAINED WINDS OF 15 TO 25 MPH WITH GUSTS UP TO
45 MPH ARE POSSIBLE THROUGH WEDNESDAY AFTERNOON. TOWARDS WEDNESDAY
EVENING INTO THURSDAY MORNING, SUSTAINED WINDS 20 TO 30 MPH WITH GUSTS
UP TO 60 MPH ARE POSSIBLE. IN MORE SHELTERED AREAS, EXPECT THE WINDS TO
BE CLOSER TO 10 TO 20 MPH WITH GUSTS UP TO 45 MPH.
REST OF TODAY
SKY/WEATHER.........MOSTLY SUNNY (25-35 PERCENT).
CWR.................0 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....82-87.
MIN HUMIDITY........6-11 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......EAST WINDS AROUND 10 MPH.
MIXING HEIGHT.......8500 FT AGL.
TRANSPORT WINDS.....SOUTH AROUND 10 MPH.
TIME (MDT) 5PM
SKY (%).........28
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0
CHC OF THDR (%).0
TEMP............84
RH..............12
20 FT WIND DIR..E
20 FT WIND SPD..10
20 FT WIND GUST.15
MIX HGT (KFT)...8.5
TRANSP WIND DIR.S
TRANSP WIND SPD.10
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY (40-50 PERCENT) THEN BECOMING
MOSTLY CLOUDY (75-85 PERCENT).
CWR.................5 PERCENT.
CHANCE OF THUNDER...12 PERCENT.
MIN TEMPERATURE.....53-58.
MAX HUMIDITY........37-42 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......EAST WINDS 5 TO 10 MPH SHIFTING TO THE
SOUTHEAST EARLY IN THE MORNING.
MIXING HEIGHT.......500 FT AGL.
TRANSPORT WINDS.....SOUTHEAST 10 TO 15 MPH.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........44 65 68 71 47 50 32 50 70 84 90 80
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............10 10 10 10 10 10 0 0 0 0 0 0
CHC OF THDR (%).10 10 10 0 0 0 0 0 0 0 0 0
TEMP............82 79 74 69 66 64 61 59 59 59 57 57
RH..............13 17 21 25 29 32 35 37 38 39 40 40
20 FT WIND DIR..E E E E E E E SE SE SE SE SE
20 FT WIND SPD..10 10 10 10 10 5 5 5 5 5 5 5
20 FT WIND GUST.15 15 15 15 15 15 15 15 10 10 10 10
MIX HGT (KFT)...7.5 3.0 1.0 1.0 1.0 0.5 0.5 0.5 0.5 0.5 0.5 0.5
TRANSP WIND DIR.E E E E E E E SE SE S S SE
TRANSP WIND SPD.15 15 15 15 15 15 15 15 10 15 10 10
WEDNESDAY
SKY/WEATHER.........MOSTLY CLOUDY (70-80 PERCENT) THEN BECOMING
MOSTLY SUNNY (40-50 PERCENT). SLIGHT CHANCE OF
RAIN EARLY IN THE AFTERNOON. SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS LATE IN THE
AFTERNOON, THEN SLIGHT CHANCE OF RAIN LATE IN
THE AFTERNOON.
CWR.................5 PERCENT.
CHANCE OF THUNDER...18 PERCENT.
MAX TEMPERATURE.....78-83.
MIN HUMIDITY........11-16 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......LIGHT WINDS BECOMING SOUTHWEST 5 TO 10 MPH
EARLY IN THE MORNING, THEN INCREASING TO AROUND
15 MPH WITH GUSTS TO AROUND 30 MPH LATE IN THE
MORNING. GUSTY AND ERRATIC WINDS EXPECTED NEAR
THUNDERSTORMS LATE IN THE AFTERNOON.
MIXING HEIGHT.......10000 FT AGL INCREASING TO 11000 FT AGL LATE IN
THE AFTERNOON.
TRANSPORT WINDS.....SOUTH 10 TO 15 MPH INCREASING TO SOUTHWEST
AROUND 30 MPH.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........85 78 96 65 55 54 38 39 55 43 43 43
WEATHER COV..... SCH SCH SCH SCH SCH SCH
WEATHER TYPE.... RN RN RN RW RW RN
TSTM COV........ SCH SCH
CWR.............10 10 10 10 10 10 10 10 10 10 10 10
CHC OF THDR (%).0 0 0 0 0 0 0 0 0 20 20 10
TEMP............57 56 58 63 72 75 78 79 78 78 77 74
RH..............42 42 41 36 26 21 17 17 16 16 16 18
20 FT WIND DIR..SE S S SW SW SW SW SW SW SW SW W
20 FT WIND SPD..0 0 5 5 10 15 15 15 15 15 15 15
20 FT WIND GUST.5 10 10 10 15 20 25 25 30 30 25
MIX HGT (KFT)...0.5 0.5 0.5 1.5 2.5 6.5 8.0 10 11 10 11 11
TRANSP WIND DIR.S S S SW SW SW SW SW SW SW SW SW
TRANSP WIND SPD.10 10 10 15 20 25 30 30 30 30 30 30
FORECASTER...GLINSKAS
REQUESTED BY...JAY PETERMAN
TYPE OF REQUEST...PRESCRIBED
.TAG 2611243.0/TFX
.DELDT 04/21/26
.FORMATTERVERSION 2.0.0
.EMAIL JPETERMAN@BLM.GOV, TFX.OPS@NOAA.GOV
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