917
FNUS75 KTFX 290700
FWSTFX

Spot Forecast for Dalton Unit 42...USFS
National Weather Service Great Falls MT
100 AM MDT Tue Sep 29 2026

Forecast is based on ignition time of 0100 MDT on September 29.
If conditions become unrepresentative...contact the National Weather
Service.

Resend

.DISCUSSION...

Generally dry conditions will persist over the next few days with
highs in the upper 50s to low 60s. Winds will start to pick up out
of the west after midnight tonight and remain sustained between
10-15 mph with gusts up to 35 mph through Wednesday afternoon.


.REST OF TODAY...

Sky/weather.........Sunny (0-10 percent).
CWR.................0 percent.
Chance of thunder...0 percent.
Max temperature.....53-58.
Min humidity........37-42 percent.
Wind (20 ft)........
 Slope/valley.......West winds around 10 mph.
Mixing height.......4500 ft AGL.
Transport winds.....West around 15 mph.

TIME (MDT)      5PM
Sky (%).........7
Weather cov.....
Weather type....
Tstm cov........
CWR.............0
Chc of thdr (%).0
Temp............53
RH..............45
20 FT wind dir..W
20 FT wind spd..10
20 FT wind gust.20
Mix hgt (kft)...4.5
Transp wind dir.W
Transp wind spd.15

.TONIGHT...

Sky/weather.........Mostly clear (10-20 percent).
CWR.................0 percent.
Chance of thunder...0 percent.
Min temperature.....35-40.
Max humidity........73-78 percent.
Wind (20 ft)........
 Slope/valley.......West winds 10 to 15 mph. Gusts up to 30 mph
                    overnight.
Mixing height.......500 ft AGL.
Transport winds.....West 10 to 15 mph.

TIME (MDT)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........2   5   7   7   11  8   5   9   15  13  12  25
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............53  50  45  43  42  41  40  40  39  38  38  38
RH..............44  50  61  64  67  71  71  70  74  75  77  77
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  10  15  15  10  10  15  15
20 FT wind gust.20  15  15  15  15  15  25  25  25  25  30  30
Mix hgt (kft)...4.0 1.0 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.15  10  10  10  10  10  15  15  15  15  15  15

.TUESDAY...

Sky/weather.........Mostly sunny (40-50 percent).
CWR.................0 percent.
Chance of thunder...0 percent.
Max temperature.....55-60.
Min humidity........43-48 percent.
Wind (20 ft)........
 Slope/valley.......West winds 10 to 15 mph with gusts up to 35
                    mph.
Mixing height.......4500 ft AGL.
Transport winds.....West 15 to 20 mph increasing to around 25 mph
                    in the afternoon.

TIME (MDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........36  57  61  44  35  48  52  38  47  37  26  41
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............37  37  37  39  42  46  49  51  54  55  55  56
RH..............78  76  77  75  66  56  48  48  48  48  48  51
20 FT wind dir..W   W   SW  W   W   W   W   W   W   W   W   W
20 FT wind spd..15  10  10  10  10  10  10  15  15  15  15  15
20 FT wind gust.25  25  20  20  25  25  25  30  30  30  35  35
Mix hgt (kft)...0.5 0.5 0.5 1.0 1.5 2.0 2.5 3.5 4.0 4.5 4.5 4.5
Transp wind dir.W   W   W   W   W   W   W   W   W   W   W   W
Transp wind spd.15  15  15  15  15  20  20  25  25  25  25  25

$$
Forecaster...Brusda
Requested by...Nick Boucher
Type of request...PRESCRIBED
.TAG 2622631.2/TFX
.DELDT 09/29/26
.FormatterVersion 2.0.0