665
FNUS75 KTFX 131504 RRA
FWSTFX
SPOT FORECAST FOR SOUTH FORK...BLM LEWISTOWN DISPATCH
NATIONAL WEATHER SERVICE GREAT FALLS MT
752 AM MST TUE JAN 13 2026
FORECAST IS BASED ON FORECAST START TIME OF 0800 MST ON JANUARY 13.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
A NORTHWESTERLY FLOW REMAINS ACROSS THE REGION AROUND UPPER LEVEL
HIGH PRESSURE CENTERED ALONG AND WEST OF THE NORTHERN ROCKIES.
SOME MOISTURE IS EMEBEDDED AND BRINGING THICKER CLOUD-COVER AND A
SLIGHT CHANCE FOR LIGHT RAIN SHOWERS THIS MORNING WITH CLOUD-
COVER EXPECTED TO THIN THIS AFTERNOON THROUGH WEDNESDAY.
TEMPERATURES REMAIN WELL ABOVE SEASONAL AVERAGES WITH CLOUDS AND
MOISTURE KEEPING RH SOMEWHAT ELEVATED TODAY, BUT LOWER AFTERNOON
RH IS EXPECTED WITH DRYING ON WEDNESDAY. GUSTY NORTHWEST WINDS
PERSIST THIS MORNING AND SLOWLY DIMINISH THIS AFTERNOON AND
EVENING.
REST OF TODAY
SKY/WEATHER.........MOSTLY CLOUDY (70-80 PERCENT). SLIGHT CHANCE OF
RAIN SHOWERS EARLY IN THE MORNING.
CWR.................15 PERCENT DECREASING TO 5 PERCENT LATE IN THE
MORNING.
CHANCE OF THUNDER...ZERO PERCENT.
MAX TEMPERATURE.....55-60.
MIN HUMIDITY........41-46 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......NORTHWEST WINDS 15 TO 20 MPH WITH GUSTS TO
AROUND 35 MPH DECREASING TO AROUND 15 MPH LATE
IN THE AFTERNOON.
RIDGETOP...........NORTHWEST 20 TO 30 MPH WITH GUSTS TO 45 MPH.
MIXING HEIGHT.......3000 FT AGL.
TRANSPORT WINDS.....NORTHWEST AROUND 40 MPH.
TIME (MST) 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........71 74 71 65 66 75 70 76 84 82
WEATHER COV.....SCH
WEATHER TYPE....RN
TSTM COV........
CWR.............20 20 20 10 10 10 10 10 10 0
CHC OF THDR (%).0 0 0 0 0 0 0 0 0 0
TEMP............48 49 50 51 52 52 54 52 50 48
RH..............64 51 49 51 48 48 48 46 49 54
20 FT WIND DIR..NW NW NW NW NW NW NW NW NW NW
20 FT WIND SPD..20 20 20 20 20 15 15 15 15 10
20 FT WIND GUST.40 40 40 35 30 30 30 30 25 20
RIDGE WIND DIR..NW NW NW NW NW NW NW NW NW NW
RIDGE WIND SPD..65 65 60 55 55 50 45 45 40 40
MIX HGT (KFT)...0.5 1.0 2.0 3.0 3.0 3.0 3.0 2.5 1.5 0.5
TRANSP WIND DIR.NW NW NW NW NW NW NW NW NW NW
TRANSP WIND SPD.35 35 40 45 40 40 40 35 25 20
TONIGHT
SKY/WEATHER.........MOSTLY CLOUDY (60-70 PERCENT) THEN BECOMING
PARTLY CLOUDY (45-55 PERCENT) IN THE AFTERNOON.
CWR.................0 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MIN TEMPERATURE.....33-38.
MAX HUMIDITY........65-70 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......NORTHWEST WINDS 5 TO 10 MPH.
RIDGETOP...........NORTHWEST 20 TO 25 MPH.
MIXING HEIGHT.......0 FT AGL.
TRANSPORT WINDS.....NORTHWEST AROUND 20 MPH.
TIME (MST) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........76 68 57 54 57 46 41 52 39 42 45 48
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............46 45 43 42 40 39 39 36 39 39 39 41
RH..............60 62 67 68 69 70 67 67 66 65 65 65
20 FT WIND DIR..NW NW NW NW NW NW NW NW W W W W
20 FT WIND SPD..10 5 5 5 5 5 5 5 5 5 5 5
20 FT WIND GUST.20 20 15 15 15 15 15 15 15 15 15 15
RIDGE WIND DIR..NW NW NW NW NW NW NW NW NW NW NW NW
RIDGE WIND SPD..40 35 35 35 35 30 30 30 30 30 30 30
MIX HGT (KFT)...0.5 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1
TRANSP WIND DIR.NW NW NW NW NW NW NW NW NW NW NW NW
TRANSP WIND SPD.15 15 15 15 15 15 15 15 20 20 15 15
WEDNESDAY
SKY/WEATHER.........MOSTLY SUNNY (25-35 PERCENT).
CWR.................0 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....56-61.
MIN HUMIDITY........18-23 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......WEST WINDS 5 TO 10 MPH. GUSTS UP TO 25 MPH LATE
IN THE MORNING.
RIDGETOP...........NORTHWEST 20 TO 25 MPH WITH AFTERNOON GUSTS TO
35 MPH.
MIXING HEIGHT.......1500 FT AGL.
TRANSPORT WINDS.....NORTHWEST 20 TO 25 MPH.
TIME (MST) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........46 40 25 19 18 16 16 16 12 12 12 14
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............42 42 43 45 50 53 55 56 58 57 55 52
RH..............61 60 59 55 46 40 36 31 29 27 27 29
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 10 10 10 10 10 10 10
20 FT WIND GUST.15 15 15 15 15 20 20 20 20 20 20 25
RIDGE WIND DIR..NW NW NW NW NW NW NW NW NW NW NW NW
RIDGE WIND SPD..30 25 25 25 25 25 25 30 30 35 35 40
MIX HGT (KFT)...0.1 0.1 0.1 0.5 0.5 1.0 1.0 1.5 1.5 1.5 1.0 0.5
TRANSP WIND DIR.NW NW NW NW NW NW NW NW NW NW NW NW
TRANSP WIND SPD.15 15 20 20 20 15 20 20 25 25 20 20
FORECASTER...HOENISCH
REQUESTED BY...LEWISTOWN INTERAGENCY DISPATCH
TYPE OF REQUEST...WILDFIRE
.TAG 2528878.1/TFX
.DELDT 01/13/26
.FORMATTERVERSION 2.0.0
.EMAIL ROBERT.HOENISCH@NOAA.GOV
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