531
FNUS75 KTFX 051727
FWSTFX
SPOT FORECAST FOR TREASURE MTN RX...USFS
NATIONAL WEATHER SERVICE GREAT FALLS MT
1127 AM MDT TUE MAY 5 2026
FORECAST IS BASED ON IGNITION TIME OF 1200 MDT ON MAY 06.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
BRIEF UPPER LEVEL RIDGING WILL MAINTAIN A DRY DAY THROUGH THE DAY
AT THE RX AREA WEDNESDAY. THAT SAID, WIDELY SCATTERED SHOWERS AND
THUNDERSTORMS DO APPROACH FROM THE WEST NEAR OR JUST AFTER 6 PM
WEDNESDAY. WINDS GRADUALLY INCREASE OUT OF THE WEST-NORTHWEST
THROUGH THE DAY WEDNESDAY, PEAKING LATE AFTERNOON.
UNSETTLED CONDITIONS CONTINUE LATE WEDNESDAY NIGHT THROUGH
THURSDAY, WITH SHOWERS LIKELY THURSDAY AFTERNOON. THE PROBABILITY
FOR A TENTH OF AN INCH OF RAIN THROUGH THE DAY THURSDAY IS ROUGHLY
30%.
WEDNESDAY
SKY/WEATHER.........SUNNY (10-20 PERCENT).
CWR.................0 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....54-59.
MIN HUMIDITY........24-29 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......WEST-NORTHWEST WINDS 10 TO 15 MPH INCREASING TO
AROUND 20 MPH WITH GUSTS TO 30 MPH LATE IN THE
AFTERNOON.
MIXING HEIGHT.......5500 FT AGL.
TRANSPORT WINDS.....NORTHWEST 15 TO 20 MPH INCREASING TO 25 TO
30 MPH LATE IN THE AFTERNOON.
TIME (MDT) 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........6 6 6 7 13 20
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0
CHC OF THDR (%).0 0 0 0 0 0
TEMP............46 49 52 54 56 56
RH..............31 30 30 30 30 30
20 FT WIND DIR..W W W W W W
20 FT WIND SPD..10 15 15 15 20 20
20 FT WIND GUST.20 20 25 25 30 30
MIX HGT (KFT)...4.0 4.5 5.0 5.0 5.5 5.5
TRANSP WIND DIR.W NW NW W W W
TRANSP WIND SPD.15 20 20 25 25 30
WEDNESDAY NIGHT
SKY/WEATHER.........BECOMING MOSTLY CLOUDY (80-90 PERCENT). SLIGHT
CHANCE OF RAIN SHOWERS AND THUNDERSTORMS IN
THE EVENING.
CWR.................10 PERCENT.
CHANCE OF THUNDER...15 PERCENT.
MIN TEMPERATURE.....39-44.
MAX HUMIDITY........72-77 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......WEST-NORTHWEST WINDS 10 TO 20 MPH. GUSTY AND ERRATIC WINDS
NEAR ANY SHOWER OF THUNDERSTORM.
MIXING HEIGHT.......0 FT AGL.
TRANSPORT WINDS.....WEST 25 TO 30 MPH DECREASING TO 20 TO 25 MPH
EARLY IN THE EVENING.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........43 43 43 81 81 81 92 92 92 81 81 81
WEATHER COV..... SCH SCH SCH SCH SCH SCH SCH SCH SCH SCH SCH
WEATHER TYPE.... RW RW RW RW RW RW RW RW RW RW RW
TSTM COV........ SCH SCH SCH SCH SCH
CWR.............0 10 10 10 10 10 10 10 10 10 10 10
CHC OF THDR (%).10 15 15 15 15 15 10 10 10 10 10 10
TEMP............55 55 52 49 48 46 45 45 43 43 42 41
RH..............32 39 47 55 59 61 63 65 68 70 73 76
20 FT WIND DIR..W W W W W W W W W W W W
20 FT WIND SPD..20 20 20 15 15 15 15 15 15 15 15 15
20 FT WIND GUST.25 25 25 20 20 20 20 20 20 20 20 20
MIX HGT (KFT)...5.0 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.W W W W W W W W W W W W
TRANSP WIND SPD.30 25 20 20 20 20 20 20 25 25 25 20
THURSDAY
SKY/WEATHER.........PARTLY SUNNY (60-70 PERCENT). CHANCE OF RAIN
SHOWERS IN THE MORNING, THEN RAIN SHOWERS
LIKELY IN THE AFTERNOON.
CWR.................10 PERCENT.
CHANCE OF THUNDER...14 PERCENT.
MAX TEMPERATURE.....56-61.
MIN HUMIDITY........32-37 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......WEST WINDS 15 TO 20 MPH SHIFTING TO THE
NORTHWEST LATE IN THE AFTERNOON.
MIXING HEIGHT.......7000 FT AGL.
TRANSPORT WINDS.....WEST 20 TO 25 MPH INCREASING TO 25 TO 30 MPH IN
THE LATE MORNING AND AFTERNOON.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........61 61 61 57 57 57 70 70 70 70 70 70
WEATHER COV.....CHC CHC CHC CHC CHC CHC LKY LKY LKY LKY LKY LKY
WEATHER TYPE....RW RW RW RW RW RW RW RW RW RW RW RW
TSTM COV........
CWR.............10 10 10 10 10 10 10 10 10 10 10 10
CHC OF THDR (%).0 0 0 0 0 0 10 10 10 10 10 10
TEMP............41 42 44 47 49 51 53 54 55 56 57 57
RH..............76 73 67 61 54 48 42 39 37 37 36 36
20 FT WIND DIR..W W W W W W W W W NW NW NW
20 FT WIND SPD..15 15 15 20 20 20 20 20 20 20 20 20
20 FT WIND GUST.20 20 20 25 25 25 30 30 30 30 30 30
MIX HGT (KFT)...0.5 1.0 2.0 3.5 4.5 5.5 6.0 6.5 6.5 6.5 7.0 7.0
TRANSP WIND DIR.W W W W W W W W W W W NW
TRANSP WIND SPD.20 25 25 30 30 30 30 30 25 25 25 25
FORECASTER...MCDOWELL
REQUESTED BY...KYLE MILLER
TYPE OF REQUEST...PRESCRIBED
.TAG 2612651.1/TFX
.DELDT 05/05/26
.FORMATTERVERSION 2.0.0
.EMAIL KENNETH.ANDERSEN@USDA.GOV,KYLE.A.MILLER@USDA.GOV,LEWIS.TAFELMEYER@USDA.GOV, TFX.OPS@NOAA.GOV
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