983
FNUS75 KTFX 232304
FWSTFX

Spot Forecast for Firework...Wildland fire service
National Weather Service Great Falls MT
504 PM MDT Sun Aug 23 2026

Forecast is based on forecast start time of 1700 MDT on August 23.
If conditions become unrepresentative...contact the National Weather
Service.

.DISCUSSION...

In the wake of the thunderstorms that moved through the area,
expect winds to initially decrease through the evening before winds
pick back up from the west overnight tonight around 0300. Expect
poor RH and cooling overnight tonight with the increased winds,
with RH values only rising to around 50% as temperatures drop to
around 60. Winds remain elevated through the day on Monday, with
winds gusting to around 25-30 for most of the day.

.REST OF TODAY...

Sky/weather.........Partly sunny (55-65 percent). Chance of showers
                    and thunderstorms.
CWR.................5 percent.
Chance of thunder...31 percent.
Max temperature.....92-97.
Min humidity........17-22 percent.
Wind (20 ft)........
 Slope/valley.......Northwest winds around 15 mph.
 Ridgetop...........West around 20 mph.
Mixing height.......7000 ft AGL.
Transport winds.....Northwest around 20 mph.

TIME (MDT)      5PM
Sky (%).........59
Weather cov.....CHC
Weather type....RW
Tstm cov........CHC
CWR.............10
Chc of thdr (%).30
Temp............89
RH..............29
20 FT wind dir..NW
20 FT wind spd..15
20 FT wind gust.25
Ridge wind dir..W
Ridge wind spd..20
Mix hgt (kft)...7.0
Transp wind dir.NW
Transp wind spd.20

.TONIGHT...

Sky/weather.........Mostly cloudy (65-75 percent) then becoming
                    partly cloudy (25-35 percent).
CWR.................0 percent.
Chance of thunder...5 percent.
Min temperature.....57-62.
Max humidity........46-51 percent.
Wind (20 ft)........
 Slope/valley.......West winds 10 to 15 mph.
 Ridgetop...........West 20 to 25 mph increasing to 30 to 35 mph
                    after 3 am.
Mixing height.......500 ft AGL.
Transport winds.....West 15 to 20 mph decreasing to 10 to 15 mph
                    early in the evening.
TIME (MDT)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........71  45  23  10  14  15  13  12  16  13  13  18
Weather cov.....SCH
Weather type....RW
Tstm cov........SCH
CWR.............10  10  10  10  10  10  0   0   0   0   0   0
Chc of thdr (%).20  10  0   0   0   0   0   0   0   0   0   0
Temp............86  82  77  72  69  68  67  64  63  62  61  60
RH..............33  37  44  51  51  51  48  48  47  45  44  48
20 FT wind dir..W   W   W   W   W   W   W   W   W   W   W   W
20 FT wind spd..15  15  10  10  10  15  15  15  15  15  15  15
20 FT wind gust.25  20  15  15  15  20  25  25  25  25  25  25
Ridge wind dir..W   W   W   NW  NW  W   W   W   W   W   W   W
Ridge wind spd..20  20  20  20  20  20  20  20  25  25  30  35
Mix hgt (kft)...5.0 3.0 0.5 0.5 0.5 0.5 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.20  15  10  10  15  15  15  15  15  15  15  15

.MONDAY...


Sky/weather.........Sunny (15-25 percent).
CWR.................0 percent.
Chance of thunder...0 percent.
Max temperature.....81-86.
Min humidity........21-26 percent.
Wind (20 ft)........
 Slope/valley.......Breezy. West winds 15 to 20 mph shifting to the
                    northwest around 25 mph in the afternoon.
 Ridgetop...........West 35 to 40 mph becoming northwest 25 to 30
                    mph late in the morning.
Mixing height.......8500 ft AGL.
Transport winds.....West 15 to 20 mph increasing to around 25 mph
                    in the late morning and afternoon.

TIME (MDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........14  34  11  4   2   1   3   5   3   8   7   7
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............59  59  61  65  69  72  75  78  80  81  81  82
RH..............50  51  51  50  46  40  35  31  27  26  26  27
20 FT wind dir..W   W   W   W   W   W   W   W   NW  NW  NW  NW
20 FT wind spd..15  20  20  20  20  20  25  25  25  25  25  25
20 FT wind gust.25  30  30  30  30  30  30  30  35  35  35  30
Ridge wind dir..W   W   W   NW  NW  NW  NW  NW  NW  W   W   NW
Ridge wind spd..40  40  40  35  35  30  30  30  25  25  25  25
Mix hgt (kft)...0.5 1.0 1.5 2.5 4.0 4.5 5.5 7.0 7.5 8.5 8.5 8.5
Transp wind dir.W   W   W   W   W   W   W   W   W   W   NW  NW
Transp wind spd.15  20  20  20  25  25  25  25  25  25  25  25

$$
Forecaster...Ludwig
Requested by...Lewistown Dispatch
Type of request...WILDFIRE
.TAG 2620330.0/TFX
.DELDT 08/23/26
.FormatterVersion 2.0.0
.EMAIL mtlec@firenet.gov, tfx.ops@noaa.gov