Spot Forecast
Issued by NWS Great Falls, MT
Issued by NWS Great Falls, MT
949
FNUS75 KTFX 100146
FWSTFX
Spot Forecast for Mass Geis 25...USFS
National Weather Service Great Falls MT
746 PM MDT Thu Oct 9 2025
Forecast is based on ignition time of 2000 MDT on October 09.
If conditions become unrepresentative...contact the National Weather
Service.
.DISCUSSION...
One final warm and relatively tranquil weather day is expected at
the burn site on Friday with mostly clear skies, winds topping
our around 10-15 mph, and high temperatures near 70. After clear
skies continue through the overnight with very good RH recoveries
Friday night, Saturday will see rapidly increasing clouds along
with increasing rain chances through the day, with a few
thunderstorms expected in the afternoon. Expect a slightly cooler
day with highs reaching the mid 60s, and winds will generally
remain light outside of heavier showers and thunderstorms in the
afternoon, which could produce some gusty and erratic wind gusts
to 30 or 40 mph.
.FRIDAY...
Sky/weather.........Sunny (15-25 percent).
CWR.................5 percent.
Chance of thunder...2 percent.
Max temperature.....70-75.
Min humidity........29-34 percent.
Wind (20 ft)........
Slope/valley.......East winds 5 to 10 mph shifting to the south 10
to 15 mph in the afternoon.
Mixing height.......6500 ft AGL.
Transport winds.....Southeast around 10 mph shifting to the south
late in the morning, then increasing to 15 to
20 mph late in the afternoon.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........10 31 26 35 15 26 18 20 28 7 21 19
Weather cov.....
Weather type....
Tstm cov........
CWR.............10 10 10 10 10 10 0 0 0 0 0 0
Chc of thdr (%).0 0 0 0 0 0 0 0 0 0 0 0
Temp............41 41 41 48 55 60 64 68 70 70 70 71
RH..............69 66 70 67 52 46 41 38 37 36 34 36
20 FT wind dir..E E E E E SE S S S S S S
20 FT wind spd..5 10 5 5 10 10 10 10 10 15 10 10
20 FT wind gust.15 15 15 15 15 15 20 20 25 25 25 25
Mix hgt (kft)...1.0 1.0 1.0 1.0 1.0 2.0 3.0 4.0 6.0 6.0 6.5 5.0
Transp wind dir.E E E SE SE S S S S S S S
Transp wind spd.10 10 10 10 10 10 15 15 20 20 20 15
.FRIDAY NIGHT...
Sky/weather.........Mostly clear (10-20 percent).
CWR.................5 percent.
Chance of thunder...2 percent.
Min temperature.....43-48.
Max humidity........78-83 percent.
Wind (20 ft)........
Slope/valley.......South winds around 10 mph.
Mixing height.......1000 ft AGL.
Transport winds.....South 10 to 15 mph shifting to the southwest
overnight.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........1 10 8 4 10 9 16 16 16 28 28 28
Weather cov.....
Weather type....
Tstm cov........
CWR.............0 0 0 0 0 0 10 10 10 10 10 10
Chc of thdr (%).0 0 0 0 0 0 0 0 0 0 0 0
Temp............67 63 59 53 52 51 50 49 48 47 46 46
RH..............39 46 55 61 63 65 68 70 72 73 74 76
20 FT wind dir..SE SE SE SE SE S S S S S S S
20 FT wind spd..10 10 10 10 10 10 10 10 10 10 10 10
20 FT wind gust.20 20 20 20 20 20 20 20 20 15 15 15
Mix hgt (kft)...1.5 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0
Transp wind dir.SE E SE SE S S S S SW SW SW SW
Transp wind spd.15 10 10 10 10 10 10 10 10 10 10 10
.SATURDAY...
Sky/weather.........Mostly cloudy (70-80 percent). Chance of rain
in the morning, then rain early in the
afternoon. Rain showers and slight chance of
thunderstorms late in the afternoon.
CWR.................5 percent increasing to 50 percent in the
afternoon.
Chance of thunder...18 percent.
Max temperature.....62-67.
Min humidity........51-56 percent.
Wind (20 ft)........
Slope/valley.......Southwest winds 5 to 10 mph becoming around 10
mph late in the afternoon. Gusty and erratic
winds expected near thunderstorms late in the
afternoon.
Mixing height.......5000 ft AGL.
Transport winds.....Southwest 10 to 15 mph shifting to the west
late in the afternoon.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........63 63 63 63 63 63 86 86 86 86 86 86
Weather cov.....CHC CHC CHC CHC CHC CHC DEF DEF DEF DEF DEF DEF
Weather type....RN RN RN RN RN RN RN RN RN RW RW RW
Tstm cov........ SCH SCH SCH
CWR.............10 10 10 10 10 10 50 50 50 50 50 50
Chc of thdr (%).0 0 0 10 10 10 10 10 10 20 20 20
Temp............46 46 48 50 54 57 61 62 63 62 61 59
RH..............77 80 83 83 77 69 61 57 55 56 59 63
20 FT wind dir..S S S S S S SW SW SW SW SW SW
20 FT wind spd..5 5 5 5 5 5 10 10 10 10 10 10
20 FT wind gust.10 10 10 15 15 15 20 20 20 20 20 20
Mix hgt (kft)...1.0 0.5 0.5 1.0 2.0 3.0 4.0 4.5 5.0 5.0 4.0 2.5
Transp wind dir.SW SW SW SW SW SW SW SW SW SW SW W
Transp wind spd.10 10 10 10 10 10 15 15 15 10 10 10
$$
Forecaster...Ludwig
Requested by...Evan Haugan
Type of request...PRESCRIBED
.TAG 2523279.0/TFX
.DELDT 10/09/25
.FormatterVersion 2.0.0
.EMAIL evan.haugan@gmail.com, tfx.ops@noaa.gov