469
FNUS75 KTFX 281201
FWSTFX

Spot Forecast for Dalton Unit 42...USFS
National Weather Service Great Falls MT
601 AM MDT Mon Sep 28 2026

Forecast is based on ignition time of 1100 MDT on September 28.
If conditions become unrepresentative...contact the National Weather
Service.

...Increasing winds on Tue...

.DISCUSSION...
Generally dry conditions are expected for the next several days.
There will be a period of increased winds, generally Tuesday into
early Wednesday. Afternoon temperatures will be a bit warmer than
they have been for today and Tue, with slightly cooler
temperatures for Wed.

.TODAY...

Sky/weather.........Mostly sunny (20-30 percent).
CWR.................0 percent.
Chance of thunder...0 percent.
Max temperature.....60-65.
Min humidity........30-35 percent.
Wind (20 ft)........
 Slope/valley.......Light winds becoming west 5 to 10 mph in the
                    late morning and afternoon.
Mixing height.......5000 ft AGL.
Transport winds.....Southwest 5 to 10 mph shifting to the west 10
                    to 15 mph late in the morning.

TIME (MDT)      11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........16  20  14  8   7   9   6
Weather cov.....
Weather type....
Tstm cov........
CWR.............0   0   0   0   0   0   0
Chc of thdr (%).0   0   0   0   0   0   0
Temp............49  51  55  59  62  63  60
RH..............62  55  50  45  40  35  33
20 FT wind dir..W   W   W   W   W   W   W
20 FT wind spd..5   5   10  10  10  10  10
20 FT wind gust.15  15  15  15  20  20  20
Mix hgt (kft)...2.5 4.0 4.5 4.5 5.0 5.0 4.5
Transp wind dir.W   W   W   W   W   W   W
Transp wind spd.10  10  15  15  15  15  15

.TONIGHT...

Sky/weather.........Mostly clear (10-20 percent).
CWR.................0 percent.
Chance of thunder...0 percent.
Min temperature.....35-40.
Max humidity........61-66 percent.
Wind (20 ft)........
 Slope/valley.......West winds 10 to 15 mph.
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   6   10  10  17  11  8   9   8   12  17  29
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............55  50  46  45  43  42  41  41  40  39  38  38
RH..............43  46  51  53  54  57  58  59  62  63  65  66
20 FT wind dir..W   W   W   W   W   W   W   SW  SW  SW  SW  SW
20 FT wind spd..10  10  10  10  10  10  10  15  10  10  10  15
20 FT wind gust.20  15  15  15  15  15  15  20  20  20  20  20
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  15  10  10  10  10  10  15  15  15  15  15

.TUESDAY...

Sky/weather.........Partly sunny (50-60 percent).
CWR.................0 percent.
Chance of thunder...0 percent.
Max temperature.....62-67.
Min humidity........28-33 percent.
Wind (20 ft)........
 Slope/valley.......West winds 10 to 15 mph. Gusts up to 35 mph in
                    the afternoon.
Mixing height.......5500 ft AGL.
Transport winds.....West 15 to 20 mph increasing to 20 to 25 mph
                    late in the afternoon.

TIME (MDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........47  47  47  40  40  40  65  65  65  58  58  58
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............38  38  37  39  44  48  52  56  60  62  64  63
RH..............66  65  63  62  54  47  41  37  33  31  30  33
20 FT wind dir..SW  SW  SW  W   W   W   W   W   W   W   W   W
20 FT wind spd..10  10  10  10  10  10  15  15  15  15  15  15
20 FT wind gust.20  20  20  20  20  20  30  30  30  35  35  35
Mix hgt (kft)...0.5 0.5 0.5 1.0 2.0 3.0 3.5 4.5 5.0 4.5 5.5 5.5
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  20  20  25  20  20

$$
Forecaster...Brusda
Requested by...Nick Boucher
Type of request...PRESCRIBED
.TAG 2622631.0/TFX
.DELDT 09/28/26
.FormatterVersion 2.0.0
.EMAIL nicholas.boucher@usda.gov,jarel.kurtz@usda.gov,jason.l.gilbert@usda.gov