637
FNUS75 KTFX 132030
FWSTFX
SPOT FORECAST FOR NELSON FIRE...US WILDLAND FIRE SERVICE/BLM
NATIONAL WEATHER SERVICE GREAT FALLS MT
230 PM MDT MON APR 13 2026
FORECAST IS BASED ON FORECAST START TIME OF 1400 MDT ON APRIL 13.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
WHILE MOSTLY SUNNY SKIES ARE EXPECTED TODAY, THERE REMAINS A LOW
(20%) CHANCE OF A RAIN SHOWER OR THUNDERSTORM (10%) THROUGH THE
REMAINDER OF THE AFTERNOON, WITH CHANCES INCREASING SLIGHTLY TO
AROUND 30% BETWEEN 2100 AND 2400 THIS EVENING. WATCH FOR SOME
INCREASED WINDS IN AND AROUND THE SHOWERS, BUT OTHERWISE WINDS
SHOULD REMAIN AROUND 5 TO 10 MPH WITH GUSTS TO 20 MPH THROUGH THE
AFTERNOON. TUESDAY WILL BE A DRIER DAY WITH RH VALUES DIPPING TO
AROUND 25% AND REDUCED TO NO SHOWER ACTIVITY. WINDS WILL BE A BIT
HIGHER, HOWEVER, WITH WINDS UP TO 15 MPH WITH GUSTS TO 25 MPH
DURING THE MID AFTERNOON.
REST OF TODAY
SKY/WEATHER.........PARTLY SUNNY (60-70 PERCENT). CHANCE OF RAIN
EARLY IN THE AFTERNOON, THEN SLIGHT CHANCE OF
RAIN LATE IN THE AFTERNOON.
CWR.................5 PERCENT.
CHANCE OF THUNDER...6 PERCENT.
MAX TEMPERATURE.....58-63.
MIN HUMIDITY........35-40 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......NORTHWEST WINDS 5 TO 10 MPH WITH GUSTS TO 20
MPH.
RIDGETOP...........WEST 15 TO 20 MPH.
MIXING HEIGHT.......5500 FT AGL.
TRANSPORT WINDS.....WEST 15 TO 20 MPH.
TIME (MDT) 2PM 3PM 4PM 5PM
SKY (%).........68 59 60 59
WEATHER COV.....CHC CHC SCH SCH
WEATHER TYPE....RN RN RN RN
TSTM COV........
CWR.............10 10 10 10
CHC OF THDR (%).0 10 10 10
TEMP............58 60 60 60
RH..............49 46 43 41
20 FT WIND DIR..NW NW NW NW
20 FT WIND SPD..10 10 10 5
20 FT WIND GUST.15 15 15 15
RIDGE WIND DIR..W W W W
RIDGE WIND SPD..20 20 15 15
MIX HGT (KFT)...5.0 5.0 5.5 5.0
TRANSP WIND DIR.W W W W
TRANSP WIND SPD.20 20 20 15
TONIGHT
SKY/WEATHER.........MOSTLY CLOUDY (60-70 PERCENT) THEN BECOMING
PARTLY CLOUDY (25-35 PERCENT). SLIGHT CHANCE OF
RAIN IN THE EVENING.
CWR.................5 PERCENT.
CHANCE OF THUNDER...7 PERCENT.
MIN TEMPERATURE.....40-45.
MAX HUMIDITY........66-71 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......WEST WINDS AROUND 5 MPH.
RIDGETOP...........WEST 15 TO 20 MPH INCREASING TO 30 TO 35 MPH.
MIXING HEIGHT.......1000 FT AGL.
TRANSPORT WINDS.....WEST AROUND 15 MPH.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........61 67 72 56 54 59 50 47 40 12 17 19
WEATHER COV.....SCH SCH SCH SCH CHC SCH SCH
WEATHER TYPE....RN RN RN RN RN RN RN
TSTM COV........
CWR.............10 10 10 10 10 10 10 10 10 10 10 10
CHC OF THDR (%).10 10 10 10 10 10 0 0 0 0 0 0
TEMP............59 58 53 51 50 50 49 48 47 45 44 43
RH..............44 47 56 60 63 67 68 71 70 71 71 71
20 FT WIND DIR..NW NW NW W W SW SW W W W W W
20 FT WIND SPD..5 5 5 5 5 5 5 5 5 5 5 5
20 FT WIND GUST.15 10 10 10 10 10 15 15 15 15 15 15
RIDGE WIND DIR..W W W W W W W W W W W W
RIDGE WIND SPD..15 20 20 20 25 25 25 30 30 35 30 30
MIX HGT (KFT)...4.5 4.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0
TRANSP WIND DIR.W W N NW W W SW W W W W W
TRANSP WIND SPD.15 15 10 10 5 10 10 10 15 15 15 15
TUESDAY
SKY/WEATHER.........SUNNY (15-25 PERCENT) THEN BECOMING PARTLY
SUNNY (45-55 PERCENT).
CWR.................0 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....64-69.
MIN HUMIDITY........20-25 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......WEST WINDS 10 TO 15 MPH WITH GUSTS UP TO 25
MPH.
RIDGETOP...........WEST 25 TO 30 MPH.
MIXING HEIGHT.......8500 FT AGL.
TRANSPORT WINDS.....WEST AROUND 15 MPH INCREASING TO 20 TO 25 MPH
IN THE LATE MORNING AND AFTERNOON.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........10 9 15 8 8 9 7 9 25 32 33 51
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 43 46 49 54 57 59 62 64 65 66 64
RH..............71 69 60 53 47 42 36 32 28 26 25 25
20 FT WIND DIR..W W W W W W W W W W W W
20 FT WIND SPD..10 10 10 10 10 15 15 15 15 15 15 15
20 FT WIND GUST.15 15 20 20 25 25 25 25 25 25 25 25
RIDGE WIND DIR..W W W W W W W W W W W W
RIDGE WIND SPD..30 25 20 20 15 20 20 20 25 25 25 30
MIX HGT (KFT)...1.0 1.0 1.0 2.5 4.0 4.5 6.0 7.0 8.0 8.5 8.5 8.0
TRANSP WIND DIR.W W W W W W W W W W W W
TRANSP WIND SPD.15 15 15 25 20 20 20 20 25 25 25 25
FORECASTER...LUDWIG
REQUESTED BY...J. BLOXHAM IC
TYPE OF REQUEST...WILDFIRE
.TAG 2610148.1/TFX
.DELDT 04/13/26
.FORMATTERVERSION 2.0.0
.EMAIL MTLEC@FIRENET.GOV, TFX.OPS@NOAA.GOV
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page