Spot Forecast
Issued by NWS Atlanta, GA
Issued by NWS Atlanta, GA
601
FNUS72 KFFC 041012
FWSFFC
Spot Forecast for Compartment 110...Usfs
National Weather Service Peachtree City GA
512 AM EST Wed Dec 4 2024
Forecast is based on ignition time of 0900 EST on December 04.
If conditions become unrepresentative...contact the National Weather
Service.
.DISCUSSION...
At ignition time, the temperature will be around 32 degrees and
relative humidity will be around 75%. Frost is likely at the site
this morning. Relative humidity is expected to bottom out between
29% and 44% between 12 PM and 4 PM. Surface winds will be calm
until around 11 AM, after which winds will be southwesterly to
south-southwesterly at 5-8 mph. Transport winds will peak at 13-15
mph. Mixing heights will peak around 2500 feet early this
afternoon.
Light rain showers will be possible (15% to 25% chance) overnight
into early Thursday morning, with only a few hundredths of an
inch at most. Frost is not expected overnight at the ignition
site. Surface winds (and to a lesser degree, transport winds) will
stay elevated overnight, shifting to westerly by daybreak.
Surface winds will shift further to northwesterly by early
afternoon at 9-13 mph with gusts up to around 20 mph. Transport
winds will be 20-25 mph. Mixing heights will peak around 3300 feet
tomorrow afternoon. Minimum relative humidity will bottom out
around 40% tomorrow afternoon.
Please let us know if you have any questions or concerns.
.REST OF TODAY...
Sky/weather.........Sunny (5-15 percent).
CWR.................0 percent.
LAL.................1.
Max temperature.....Around 51.
Min humidity........36 percent.
Dewpoint............25.
Wind (20 ft)........Light winds becoming southwest 5 to 7 mph late
in the morning.
Mixing height.......2400 ft AGL.
Transport winds.....Southwest 2 to 10 mph increasing to 10 to 15
mph in the afternoon.
Smoke dispersal.....Poor (3000 knot-ft) early in the morning
increasing to fair (29300 knot-ft) in the
afternoon.
LVORI...............2.
ADI.................2 to 41.
Haines Index........4 or low potential for large plume dominated
fire growth.
Pcpn amount.........0.00 inches.
CEILING (KFT).......25 decreasing to 10.
TIME (EST) 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........0 1 2 10 19 14 13 14 17
Weather cov.....
Weather type....
Tstm cov........
CWR.............0 0 0 0 0 0 0 0 0
LAL.............1 1 1 1 1 1 1 1 1
Temp............32 37 42 46 49 51 51 51 48
Dewpoint........24 24 25 25 25 25 26 27 27
RH..............74 58 49 44 38 36 36 38 43
20 FT wind dir..SW SW SW SW SW SW SW SW SW
20 FT wind spd..1 2 5 6 6 6 7 6 5
20 FT wind gust.2 5 8 9 10 10 12 10 8
Mix hgt (kft)...0.2 1.3 1.6 2.1 2.4 2.4 2.2 2.2 0.2
Transp wind dir.SW SW SW SW SW SW SW SW SW
Transp wind spd.2 3 7 10 14 15 15 13 10
LVORI...........3 3 2 2 1 1 1 1 2
ADI.............2 6 14 30 39 41 39 35 11
Haines index....4 4 4 4 4 4 4 4 4
Vrate kt-ft/1K..3 4 10 23 29 28 26 24 18
Ventrate Cat....PR PR PR PR PR PR PR PR PR
Ceiling (kft)...25 25 25 25 25 25 25 15 10
.TONIGHT...
Sky/weather.........Partly cloudy (25-35 percent) then becoming
mostly cloudy (65-75 percent). Slight chance of
rain showers after 3 am.
CWR.................10 percent increasing to 20 percent after 3 am.
LAL.................1.
Min temperature.....Around 44.
Max humidity........100 percent.
Dewpoint............30 increasing to 42.
Wind (20 ft)........Light winds becoming southwest 5 to 8 mph in
the late evening and overnight.
Mixing height.......200 ft AGL.
Transport winds.....Southwest 5 to 10 mph.
Smoke dispersal.....Poor (700 knot-ft).
LVORI...............4.
ADI.................2 to 8.
Haines Index........2 to 4 or very low to low potential for large
plume dominated fire growth.
Pcpn amount.........0.00 inches.
CEILING (KFT).......12 decreasing to 8.0 early in the evening, then
increasing to 9.0 late in the evening
decreasing to 7.0 late in the evening
increasing to 8.0 decreasing to 6.0 overnight
decreasing to 5.0 decreasing to 4.0 after 3 am
decreasing to 2.5.
TIME (EST) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........22 25 28 39 53 66 75 84 83 82 81 80
Weather cov..... SCH SCH SCH
Weather type.... RW RW RW
Tstm cov........
CWR.............0 0 0 0 0 10 10 10 10 20 20 20
LAL.............1 1 1 1 1 1 1 1 1 1 1 1
Temp............46 44 44 45 45 45 45 45 45 45 46 45
Dewpoint........28 29 28 28 28 28 29 29 32 36 40 42
RH..............49 55 52 52 51 51 52 54 59 69 79 86
20 FT wind dir..SW SW SW SW SW SW SW SW SW W W W
20 FT wind spd..3 3 3 5 5 5 6 7 8 8 8 8
20 FT wind gust.7 6 7 7 7 8 10 13 14 14 15 15
Mix hgt (kft)...0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.3 0.3 0.3 0.4 0.4
Transp wind dir.SW SW SW SW SW SW SW SW SW SW W W
Transp wind spd.7 5 5 5 6 7 8 8 9 9 10 9
LVORI...........2 2 2 2 2 2 2 2 3 3 4 5
ADI.............3 2 2 2 4 4 5 7 8 8 8 8
Haines index....4 4 4 4 4 4 4 4 4 4 2 2
Vrate kt-ft/1K..7 1 1 1 1 1 2 2 2 3 3 3
Ventrate Cat....PR PR PR PR PR PR PR PR PR PR PR PR
Ceiling (kft)...12 8.0 8.0 9.0 7.0 8.0 8.0 6.0 5.0 4.0 4.0 2.5
.THURSDAY...
Sky/weather.........Partly sunny (50-60 percent) then becoming
sunny (10-20 percent). Chance of rain showers
early in the morning.
CWR.................30 percent decreasing to 10 percent.
LAL.................1.
Max temperature.....Around 56.
Min humidity........40 percent.
Dewpoint............46 decreasing to 27.
Wind (20 ft)........West winds 8 to 12 mph shifting to the
northwest 9 to 12 mph late in the afternoon.
Mixing height.......3200 ft AGL.
Transport winds.....West 8 to 14 mph shifting to the northwest 17
to 24 mph in the late morning and afternoon.
Smoke dispersal.....Poor (2900 knot-ft) early in the morning
increasing to excellent (60100 knot-ft) in the
afternoon.
LVORI...............4.
ADI.................9 early in the morning increasing to 74 in the
afternoon.
Haines Index........2 to 4 or very low to low potential for large
plume dominated fire growth.
Pcpn amount.........0.00 inches.
CEILING (KFT).......1.5 decreasing to 0.9 early in the morning,
then increasing to 1.0 early in the morning
increasing to 15 late in the morning increasing
to 25.
TIME (EST) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........79 78 75 69 66 53 28 15 15 13 12 15
Weather cov.....CHC
Weather type....RW
Tstm cov........
CWR.............30 10 10 10 0 0 0 0 0 0 0 0
LAL.............1 1 1 1 1 1 1 1 1 1 1 1
Temp............45 46 47 49 51 52 54 55 55 55 53 48
Dewpoint........44 46 47 48 48 46 43 39 36 32 29 26
RH..............94 100 100 97 90 79 66 55 47 43 40 42
20 FT wind dir..W W W W W NW NW NW NW NW NW NW
20 FT wind spd..8 8 8 9 9 10 12 12 12 12 12 9
20 FT wind gust.15 15 14 16 16 17 20 21 21 21 20 16
Mix hgt (kft)...0.4 0.4 0.3 0.4 2.1 2.3 2.9 3.1 3.2 3.2 3.2 0.5
Transp wind dir.W W W W W W NW NW NW NW NW NW
Transp wind spd.8 9 14 20 24 24 23 21 22 22 22 17
LVORI...........6 7 5 5 4 3 1 1 1 1 1 2
ADI.............9 10 16 22 48 52 72 70 72 74 72 13
Haines index....2 2 2 2 2 2 2 4 4 4 4 4
Vrate kt-ft/1K..3 3 13 33 44 47 54 58 58 60 60 45
Ventrate Cat....PR PR PR PR FR FR FR FR FR FR GD FR
Ceiling (kft)...1.5 0.9 1.0 1.2 1.2 15 25 25 25 25 25 25
$$
Forecaster...Martin
Requested by...Tim Kolnik
Type of request...PRESCRIBED
.TAG 2427712.0/FFC
.DELDT 12/03/24
.FormatterVersion 2.0.0
.EMAIL timothy.kolnik@usda.gov