135
FNUS75 KTFX 231004
FWSTFX
SPOT FORECAST FOR ARROWLEAF...MT DNRC
NATIONAL WEATHER SERVICE GREAT FALLS MT
304 AM MST MON FEB 23 2026
FORECAST IS BASED ON IGNITION TIME OF 0500 MST ON FEBRUARY 23.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
...HIGH WIND WATCH IN EFFECT FROM LATE TUESDAY NIGHT THROUGH
WEDNESDAY EVENING...
DISCUSSION
A FAST WESTERLY FLOW ACROSS THE ROCKIES WITH EMBEDDED MOISTURE
FROM THE PACIFIC WILL BRING CLOUDY CONDITIONS WITH INCREASING
WESTERLY SURFACE WINDS THROUGH THIS AFTERNOON. PRECIPITATION
DEVELOPS OVER THE CONTINENTAL DIVIDE THIS MORNING WITH SHOWERS
OCCASIONALLY SPILLING FAR ENOUGH EAST TO BRING SOME RAIN OR SNOW
SHOWERS TO AREAS ON THE IMMEDIATE EAST SLOPES OF THE ROCKY
MOUNTAIN FRONT. THE STRONGEST WIND GUSTS TODAY ARE EXPECTED LATE
THIS AFTERNOON THROUGH EARLY THIS EVENING WITH WIND SPEEDS
DIMINISHING SOME BUT REMAINING WINDY TONIGHT THROUGH TUESDAY. THE
MOST LIKELY PERIOD FOR SHOWERS EXTENDING EAST INTO THE AREA IS
THIS EVENING AS AN EMEBEDDED WEATHER DISTURBANCE MOVES THROUGH.
ANOTHER WEATHER DISTURBANCE MOVES ACROSS THE ROCKIES TUESDAY
NIGHT THROUGH EARLY WEDNESDAY, BRINING ADDITIONAL CHANCES FOR
RAIN/SNOW SHOWERS ALONG WITH A RENEWED RISK FOR STRONG WIND GUSTS.
WHILE IT WILL BE VERY WINDY TODAY, THE RISK FOR GUSTS IN EXCESS OF
55 MPH HAS DECREASED (TO AROUND 40%), HOWEVER STRONG WINDS WITH
GUSTS IN EXCESS OF 55 MPH ARE LIKELY (GREATER THAN 70% CHANCE)
WEDNESDAY AND THURSDAY.
TODAY
SKY/WEATHER.........MOSTLY CLOUDY (65-75 PERCENT). A FEW RAIN AND SNOW
SHOWERS IN THE MORNING, THEN RAIN SHOWERS IN THE
AFTERNOON.
CWR.................0 PERCENT INCREASING TO 30 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....45-50.
MIN HUMIDITY........51-56 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......WINDY. SOUTHWEST WINDS 20 TO 25 MPH WITH GUSTS
TO AROUND 40 MPH INCREASING TO 30 MPH WITH GUSTS
TO AROUND 50 MPH LATE IN THE AFTERNOON.
MIXING HEIGHT.......4000 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 25 TO 30 MPH INCREASING TO 35 TO 40
MPH EARLY IN THE AFTERNOON.
TIME (MST) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........55 61 65 69 69 78 77 80 84 80 83 88
WEATHER COV.....CHC CHC CHC CHC CHC LKY LKY LKY LKY LKY LKY LKY
WEATHER TYPE....RS RS RS RS RS RS RS RN RS RS RS RS
TSTM COV........
CWR.............0 0 0 0 0 30 30 30 30 30 30 40
CHC OF THDR (%).0 0 0 0 0 0 0 0 0 0 0 0
TEMP............40 40 40 42 44 45 45 45 45 46 45 43
RH..............55 55 55 56 56 56 56 58 58 58 58 58
20 FT WIND DIR..W W W W W SW SW SW SW SW SW SW
20 FT WIND SPD..20 20 20 20 20 25 25 25 25 25 25 30
20 FT WIND GUST.35 35 35 35 35 45 45 45 50 45 45 50
MIX HGT (KFT)...1.0 1.0 1.0 1.5 2.0 2.5 3.0 3.5 4.0 3.5 3.0 2.0
TRANSP WIND DIR.W W W SW SW SW SW SW SW SW SW SW
TRANSP WIND SPD.30 30 30 25 25 30 30 35 40 35 30 30
TONIGHT
SKY/WEATHER.........MOSTLY CLOUDY (70-80 PERCENT). RAIN AND SNOW
SHOWERS IN THE EVENING, THEN CHANCE OF SNOW
OVERNIGHT.
CWR.................40 PERCENT DECREASING TO 5 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MIN TEMPERATURE.....28-33.
MAX HUMIDITY........53-58 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......WINDY. WEST WINDS 25 TO 30 MPH WITH GUSTS TO
AROUND 50 MPH DECREASING TO 15 TO 20 MPH WITH
GUSTS TO AROUND 40 MPH OVERNIGHT.
MIXING HEIGHT.......1000 FT AGL.
TRANSPORT WINDS.....WEST 25 TO 30 MPH.
TIME (MST) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........90 88 80 78 76 67 63 59 61 73 77 84
WEATHER COV.....DEF DEF LKY LKY LKY CHC CHC CHC CHC CHC CHC CHC
WEATHER TYPE....SN SN SN SN SN SN SN SN SN SN SN SN
TSTM COV........
CWR.............40 40 40 40 40 30 30 30 30 30 30 10
CHC OF THDR (%).0 0 0 0 0 0 0 0 0 0 0 0
TEMP............42 39 39 38 38 37 36 36 36 35 34 33
RH..............58 58 58 58 57 58 57 53 57 51 51 55
20 FT WIND DIR..W SW W W W W W W W W W W
20 FT WIND SPD..30 30 30 30 25 25 20 20 20 20 20 15
20 FT WIND GUST.50 50 50 45 45 40 40 40 40 35 35 30
MIX HGT (KFT)...1.0 1.5 1.5 1.5 1.5 1.5 1.0 1.0 1.5 1.5 1.0 1.5
TRANSP WIND DIR.SW W W W W W W W W W W W
TRANSP WIND SPD.30 30 30 30 25 25 30 30 30 30 30 30
TUESDAY
SKY/WEATHER.........MOSTLY CLOUDY (65-75 PERCENT). CHANCE OF SNOW
SHOWERS.
CWR.................10 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....40-45.
MIN HUMIDITY........39-44 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......WEST WINDS AROUND 15 MPH WITH GUSTS TO AROUND
30 MPH.
MIXING HEIGHT.......4000 FT AGL.
TRANSPORT WINDS.....WEST 25 TO 30 MPH DECREASING TO AROUND 20 MPH
LATE IN THE AFTERNOON.
TIME (MST) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........84 84 71 71 71 58 58 58 58 58 58 71
WEATHER COV.....CHC CHC CHC CHC CHC CHC CHC CHC CHC CHC CHC LKY
WEATHER TYPE....SN SN SN SN SN SN SN SN SN SN SN SN
TSTM COV........
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 0 0 0
TEMP............33 33 31 32 35 38 40 41 41 41 40 39
RH..............52 50 54 54 51 48 46 45 44 44 46 48
20 FT WIND DIR..W W W W W W W W W W W W
20 FT WIND SPD..15 15 15 15 15 15 15 15 15 15 15 15
20 FT WIND GUST.30 30 30 30 30 30 30 30 30 30 30 25
MIX HGT (KFT)...1.5 1.5 1.5 2.0 2.5 3.0 3.5 3.5 4.0 3.0 2.5 1.5
TRANSP WIND DIR.W W W W W W W W W W W W
TRANSP WIND SPD.30 30 30 30 25 25 25 30 30 30 25 20
FORECAST DAYS 3 THROUGH 5
WEDNESDAY
WINDY. MOSTLY CLOUDY. SNOW SHOWERS LIKELY. LOWS AROUND 30. HIGHS IN THE
UPPER 30S. WEST WINDS AROUND 35 MPH.
THURSDAY
VERY WINDY. MOSTLY CLOUDY. CHANCE OF RAIN OR SNOW SHOWERS. LOWS
IN THE LOWER 30S. HIGHS IN THE MID 40S. WEST WINDS AROUND 45 MPH.
FRIDAY
VERY WINDY. SNOW SHOWERS LIKELY. LOWS IN THE UPPER 20S. HIGHS IN THE
UPPER 30S. WEST WINDS AROUND 45 MPH.
FORECASTER...HOENISCH
REQUESTED BY...BOB CULBRETH
TYPE OF REQUEST...PRESCRIBED
.TAG 2602860.6/TFX
.DELDT 02/23/26
.FORMATTERVERSION 2.0.0
.EMAIL BOB.CULBRETH@MT.GOV
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