Spot Forecast
Issued by NWS Great Falls, MT
Issued by NWS Great Falls, MT
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FNUS75 KTFX 041148
FWSTFX
Spot Forecast for DUNN GULCH...HELENA FIRE DISPATCH USFS
National Weather Service Great Falls MT
548 AM MDT Mon Aug 4 2025
Forecast is based on forecast start time of 0800 MDT on August 04.
If conditions become unrepresentative...contact the National Weather
Service.
.DISCUSSION...
Showers and thunderstorms will move from south to north this
afternoon and evening. Peak storm coverage looks to be between
1700 and 2000 local time. The primary thunderstorm hazards will be
localized strong gusty winds, hail, and heavy downpours in
addition to cloud to ground lightning. There is around a 70
percent chance of winds gusting over 35 mph during showers and
storms. Drier conditions are expected Tuesday and Wednesday, but
westerly winds will gust in the 15 to 25 mph range each afternoon.
.REST OF TODAY...
Sky/weather.........Mostly sunny (40-50 percent) then becoming
mostly cloudy (75-85 percent). Showers likely
and chance of thunderstorms in the afternoon.
CWR.................10 percent increasing to 30 percent in the afternoon.
Chance of thunder...Increasing to 50 percent in the afternoon.
Max temperature.....80-85.
Min humidity........22-27 percent.
Wind (20 ft)........
Slope/valley.......Light and variable winds. Gusty and
erratic winds expected near thunderstorms.
Ridgetop...........South 5 to 10 mph.
Mixing height.......9000 ft AGL.
Transport winds.....South 5 to 10 mph.
TIME (MDT) 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........42 36 28 57 57 75 82 76 79 85
Weather cov..... SCH SCH CHC CHC LKY
Weather type.... RW RW RW RW RW
Tstm cov........ CHC CHC CHC
CWR.............10 10 10 10 0 0 0 0 0 0
Chc of thdr (%).20 20 20 20 30 30 30 30 30 30
Temp............62 65 68 71 75 78 79 81 79 77
RH..............48 46 44 40 35 32 29 27 31 34
20 FT wind dir..E S S SW SW W W NW NW NW
20 FT wind spd..0 0 5 5 5 5 5 5 5 10
20 FT wind gust.5 5 10 10 10 15 15 15 15
Ridge wind dir..S S S S SE SE S S S SW
Ridge wind spd..10 10 10 10 5 5 5 0 0 0
Mix hgt (kft)...1.0 2.0 2.5 3.5 4.5 6.5 8.0 9.0 8.5 5.5
Transp wind dir.SE SW S SW SW SW SW SW S SW
Transp wind spd.5 5 5 5 5 5 10 10 10 10
.TONIGHT...
Sky/weather.........Mostly cloudy (65-75 percent) then becoming
partly cloudy (40-50 percent). Rain showers
likely and chance of thunderstorms in the
evening, then chance of rain showers overnight.
CWR.................70 percent decreasing to 20 percent overnight.
Chance of thunder...50 percent decreasing to 20 percent overnight.
Min temperature.....51-56.
Max humidity........70-75 percent.
Wind (20 ft)........
Slope/valley.......Northwest winds 5 to 10 mph. Gusty and erratic
winds expected near thunderstorms.
Ridgetop...........Southwest 5 to 15 mph, becoming west to northwest.
Mixing height.......1000 ft AGL.
Transport winds.....North around 15 mph, becoming northwest
early in the evening, then decreasing to 5 to
10 mph in the late evening and overnight.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........92 91 90 89 75 62 52 63 53 51 50 43
Weather cov.....LKY LKY LKY LKY LKY CHC CHC CHC CHC CHC CHC SCH
Weather type....RW RW RW RW RW RW RW RW RW RW RW RW
Tstm cov........CHC CHC CHC SCH SCH SCH
CWR.............10 10 10 10 10 10 20 20 20 20 20 20
Chc of thdr (%).40 40 40 40 40 40 10 10 10 10 10 10
Temp............74 69 67 64 62 61 60 59 58 56 55 55
RH..............42 53 56 58 64 64 67 69 71 73 75 75
20 FT wind dir..NW N NW N NW N NW N NW N NW NW
20 FT wind spd..10 10 10 10 5 5 5 5 5 5 5 5
20 FT wind gust.15 15 15 15 15 15 15 10 10 10 10 10
Ridge wind dir..SW W NW N NW W W W SW SW SW W
Ridge wind spd..0 5 5 10 10 15 15 15 15 15 15 15
Mix hgt (kft)...3.5 3.5 2.0 1.0 1.0 1.0 1.0 1.0 2.0 2.0 1.5 1.5
Transp wind dir.N W NW N NW NW N NW NW NW NW NW
Transp wind spd.15 10 15 10 10 5 5 10 5 10 5 5
.TUESDAY...
Sky/weather.........Mostly sunny (40-50 percent).
CWR.................5 percent.
Chance of thunder...13 percent.
Max temperature.....72-77.
Min humidity........26-31 percent.
Wind (20 ft)........
Slope/valley.......Northwest winds around 5 mph, becoming
west in the late morning and afternoon.
Ridgetop...........West 15 to 20 mph.
Mixing height.......7500 ft AGL.
Transport winds.....Northwest 5 to 10 mph increasing to west around
20 mph in the late morning and afternoon.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........58 59 40 36 34 34 36 36 36 37 37 37
Weather cov.....
Weather type....
Tstm cov........
CWR.............10 10 10 10 10 10 10 10 10 10 10 10
Chc of thdr (%).0 0 0 0 0 0 10 10 10 10 10 10
Temp............53 55 55 56 60 62 64 67 69 72 73 74
RH..............75 75 75 75 71 63 55 49 44 40 36 33
20 FT wind dir..NW NW W W W W W W W W W W
20 FT wind spd..5 5 5 5 5 5 10 10 10 10 10 10
20 FT wind gust.10 10 10 10 15 15 15 15 15 20 20 20
Ridge wind dir..W W W W W W W W W W W W
Ridge wind spd..15 15 20 20 20 20 20 20 20 20 20 20
Mix hgt (kft)...2.0 1.0 2.0 2.5 3.5 4.5 5.0 6.0 6.5 7.0 7.5 7.5
Transp wind dir.W N W W W W W W W W W W
Transp wind spd.10 5 10 10 20 20 20 20 20 20 20 20
$$
Forecaster...Greely
Requested by...JOHN
Type of request...WILDFIRE
.TAG 2519071.2/TFX
.DELDT 08/04/25
.FormatterVersion 2.0.0
.EMAIL clint.reichert@usda.gov,anna.lampert@usda.gov,mthdc@firenet.gov, tfx.ops@noaa.gov