Spot Forecast
Issued by NWS Great Falls, MT
Issued by NWS Great Falls, MT
500
FNUS75 KTFX 221257
FWSTFX
Spot Forecast for Cyanide Hand Piles...Forest Service Rocky Mountain Front District
National Weather Service Great Falls MT
557 AM MST Wed Jan 22 2025
Forecast is based on ignition time of 0900 MST on January 22.
If conditions become unrepresentative...contact the National Weather
Service.
.DISCUSSION...
Today will be a fairly benign weather day, with only occasional
wind gusts to around 25 mph around noon. After seeing winds weaken
early in the overnight, winds will pick back up late tonight
through Thursday as our next weather system approaches, producing
wind gusts as high as 45 or 50 mph during the day on Friday. Snow
will become likely after sunset as a cold front approaches the
area.
.REST OF TODAY...
Sky/weather.........Partly sunny (50-60 percent).
CWR.................5 percent.
LAL.................1.
Max temperature.....27-32.
Min humidity........43-48 percent.
Wind (20 ft)........
Slope/valley.......Northwest winds 5 to 10 mph. Gusts up to 25 mph
in the late morning and early afternoon.
Mixing height.......4000 ft AGL.
Transport winds.....Northwest 15 to 20 mph increasing to 20 to 25
mph late in the afternoon, then decreasing to
around 15 mph late in the afternoon.
Haines Index........2 or very low potential for large plume
dominated fire growth.
TIME (MST) 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........75 69 67 71 75 73 63 68 39
Weather cov.....
Weather type....
Tstm cov........
CWR.............0 0 10 10 10 10 10 10 0
LAL.............1 1 1 1 1 1 1 1 1
Temp............19 23 26 26 28 27 27 26 23
RH..............56 51 48 50 50 51 51 51 53
20 FT wind dir..W NW NW NW NW NW NW NW W
20 FT wind spd..10 10 10 10 10 10 10 5 5
20 FT wind gust.25 25 25 20 20 20 20 15 15
Mix hgt (kft)...1.0 2.0 3.0 3.5 4.0 4.0 3.5 3.0 2.0
Transp wind dir.NW NW NW NW NW NW NW NW NW
Transp wind spd.15 20 20 20 25 25 20 20 15
Haines index....2 2 2 2 2 2 2 2 2
.TONIGHT...
Sky/weather.........Mostly clear (20-30 percent).
CWR.................0 percent.
LAL.................1.
Min temperature.....11-16.
Max humidity........51-56 percent.
Wind (20 ft)........
Slope/valley.......West winds 5 to 10 mph with gusts to around 25
mph shifting to the southwest around 15 mph
with gusts to around 35 mph after 3 am.
Mixing height.......1000 ft AGL.
Transport winds.....West 15 to 20 mph increasing to around 25 mph
early in the morning.
Haines Index........
TIME (MST) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........35 29 22 17 13 13 15 10 11 13 14 38
Weather cov.....
Weather type....
Tstm cov........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
LAL.............1 1 1 1 1 1 1 1 1 1 1 1
Temp............20 19 18 17 17 17 15 16 16 15 15 17
RH..............56 56 56 56 55 53 56 53 53 51 50 49
20 FT wind dir..W W W W W SW W SW SW SW SW SW
20 FT wind spd..5 5 10 10 10 10 10 10 10 15 15 15
20 FT wind gust.15 15 20 20 20 20 20 20 25 25 25 35
Mix hgt (kft)...1.0 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.W W W W W W W W W W W W
Transp wind spd.15 15 15 15 15 15 15 15 20 20 20 25
Haines index....2 2 M M M M M M M M M M
.THURSDAY...
Sky/weather.........Mostly sunny (35-45 percent) then becoming
mostly cloudy (75-85 percent). Snow likely
after sunset.
CWR.................0 percent increasing to 10 percent late in the
afternoon.
LAL.................1.
Max temperature.....32-37.
Min humidity........32-37 percent.
Wind (20 ft)........
Slope/valley.......Breezy. Southwest winds around 15 mph with
gusts to around 35 mph increasing to west
around 25 mph with gusts to around 45 mph early
in the morning.
Mixing height.......1500 ft AGL.
Transport winds.....West 25 to 30 mph increasing to 35 to 40 mph in
the afternoon.
Haines Index........3 or very low potential for large plume
dominated fire growth.
TIME (MST) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........38 38 80 80 80 81 81 81 84 84 84 80
Weather cov..... LKY
Weather type.... SN
Tstm cov........
CWR.............0 0 0 0 0 0 0 0 0 0 0 10
LAL.............1 1 1 1 1 1 1 1 1 1 1 1
Temp............15 18 19 24 29 31 33 34 34 34 32 31
RH..............48 46 47 43 39 37 37 38 39 40 41 43
20 FT wind dir..SW SW SW SW SW W W W W W W W
20 FT wind spd..15 15 25 25 25 25 25 25 25 25 25 25
20 FT wind gust.35 35 40 40 40 45 45 45 45 45 45 45
Mix hgt (kft)...1.0 1.0 1.0 1.0 1.0 1.0 1.5 1.5 1.5 1.5 1.5 1.5
Transp wind dir.W W W W W W W W W W W W
Transp wind spd.25 25 30 30 30 30 35 35 40 35 35 30
Haines index....M 3 3 3 3 3 3 3 3 3 3 3
$$
Forecaster...Ludwig
Requested by...Matthew Baker
Type of request...PRESCRIBED
.TAG 2501021.0/TFX
.DELDT 01/22/25
.FormatterVersion 2.0.0
.EMAIL Battmaker128@gmail.com, tfx.ops@noaa.gov