Spot Forecast
Issued by NWS Atlanta, GA
Issued by NWS Atlanta, GA
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FNUS72 KFFC 081952
FWSFFC
Spot Forecast for 16C/17A...USFWS
National Weather Service Peachtree City GA
252 PM EST Wed Jan 8 2025
Forecast is based on ignition time of 1000 EST on January 09.
If conditions become unrepresentative...contact the National Weather
Service.
.DISCUSSION...
Good afternoon, Nathan. Cool and dry conditions are expected to
persist across the area tomorrow. At ignition time, temperatures
will be just below freezing, but will warm through the late morning,
reaching 40 degrees by noon and up to a high of 47 degrees in the
mid to late afternoon. Relative humidity values at ignition time
will be just under 50 percent, decreasing to under 30 percent by 1
PM and down to a minimum of 25 percent at 3-4 PM. At this time, no
Fire Danger Statement has been issued, as RH are anticipated to
reach critical thresholds for only a couple of hours. 20 ft winds
will be light, at 2 mph or less through the day, starting the
morning from N and shifting to NW after 1 PM. Occasional wind gusts
between 7-10 mph will be possible through the majority of the day.
Transport winds over the burn site will be primarily N throughout
the day, at 10-12 mph in the morning hours and 6-8 mph between noon
and 2 PM. Transport winds will diminish to 5 mph or less by 3 PM.
Mixing heights are forecast to be around 1500 ft at ignition time,
increasing through the morning to 2500-3000 ft during the afternoon.
The combination of these transport winds and mixing heights will
promote moderate dispersion over the burn site through the early
afternoon.
Winds will be nearly calm after sunset and through the overnight
hours. With dewpoint values lingering in the mid-teens overnight, RH
values will rise to as high as about 70 percent early Friday
morning. As such, fog formation is not expected during the early
morning on Friday. Snow will become likely over the burn site as
early as 7 AM on Friday and through the remainder of the morning,
which will then transition to rain in the early afternoon. Please
feel free to contact us if you have any further questions or
concerns.
.THURSDAY...
Sky/weather.........Sunny (0-5 percent).
CWR.................0 percent.
Max temperature.....Around 47.
Min humidity........25 percent.
Dewpoint............13.
Wind (20 ft)........Light winds.
Mixing height.......3000 ft AGL.
Transport winds.....North 3 to 12 mph decreasing to around 2 mph
late in the afternoon.
Smoke dispersal.....Poor (7800 knot-ft) early in the morning
increasing to fair (15200 knot-ft) in the
afternoon.
LVORI...............2.
ADI.................3 to 27.
Pcpn amount.........0.00 inches.
TIME (EST) 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........3 2 3 3 2 2 1 1
Weather cov.....
Weather type....
Tstm cov........
CWR.............0 0 0 0 0 0 0 0
Temp............31 37 40 44 45 46 47 44
Dewpoint........14 13 13 12 12 13 13 15
RH..............49 38 32 28 26 25 25 30
20 FT wind dir..N N N NW NW NW NW W
20 FT wind spd..2 2 1 1 1 1 1 1
20 FT wind gust.10 10 8 8 8 7 7 5
Mix hgt (kft)...1.5 1.8 2.5 2.8 2.8 3.0 3.0 0.3
Transp wind dir.N N N N N N N N
Transp wind spd.12 10 8 7 6 5 3 2
LVORI...........2 2 2 2 2 2 2 2
ADI.............22 25 27 22 19 17 15 3
Vrate kt-ft/1K..15 15 15 15 14 12 10 8
Ventrate Cat....PR PR PR PR PR PR PR PR
.THURSDAY NIGHT...
Sky/weather.........Mostly clear (15-25 percent) then becoming
mostly cloudy (60-70 percent).
CWR.................10 percent.
Min temperature.....Around 25.
Max humidity........73 percent.
Dewpoint............17.
Wind (20 ft)........Light winds.
Mixing height.......300 ft AGL.
Transport winds.....North 0 to 1 mph.
Smoke dispersal.....Poor (200 knot-ft).
LVORI...............3.
ADI.................0 to 1.
Pcpn amount.........0.00 inches.
TIME (EST) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........0 2 3 10 16 20 27 31 40 57 65 72
Weather cov.....
Weather type....
Tstm cov........
CWR.............0 0 0 0 0 0 0 10 10 10 10 10
Temp............40 36 32 30 29 27 27 26 26 26 26 27
Dewpoint........16 16 16 16 16 16 16 16 16 17 17 18
RH..............37 44 51 55 59 62 65 66 68 69 69 69
20 FT wind dir..W N N N N N N N N N N N
20 FT wind spd..1 0 0 0 0 0 0 0 0 0 0 0
20 FT wind gust.5 3 3 3 3 3 2 2 2 2 2 2
Mix hgt (kft)...0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3
Transp wind dir.N N N N N N N N N N N N
Transp wind spd.1 1 0 0 1 0 1 1 1 1 1 0
LVORI...........2 2 2 2 3 3 3 3 4 4 4 4
ADI.............1 0 0 0 0 0 0 0 0 0 0 0
Vrate kt-ft/1K..3 0 0 0 0 0 0 0 0 0 0 0
Ventrate Cat....PR PR PR PR PR PR PR PR PR PR PR PR
.FRIDAY...
Sky/weather.........Cloudy (85-95 percent). Slight chance of rain
showers in the morning. Snow showers likely and
slight chance of freezing rain through the day.
Rain showers in the afternoon.
CWR.................10 percent increasing to 100 percent.
Max temperature.....Around 38.
Min humidity........69 percent.
Dewpoint............20 increasing to 31.
Wind (20 ft)........Light winds.
Mixing height.......1200 ft AGL.
Transport winds.....North 0 to 1 mph shifting to the east 1 to 3
mph in the late morning and afternoon.
Smoke dispersal.....Poor (200 knot-ft).
LVORI...............5.
ADI.................1 to 6.
Pcpn amount.........0.34 inches.
TIME (EST) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........85 91 92 94 95 95 95 95 94 92 91 91
Weather cov..... LKY LKY LKY LKY LKY LKY DEF DEF DEF DEF DEF
Weather type.... SW SW SW SW SW SW RW RW RW RW RW
Tstm cov........
CWR.............10 70 70 70 70 70 70 100 100 100 100 100
Temp............28 29 30 31 32 33 34 35 36 37 37 36
Dewpoint........19 20 22 25 27 29 30 30 31 31 31 32
RH..............69 70 73 78 82 84 84 83 81 79 80 86
20 FT wind dir..N N N N E E E E E E E E
20 FT wind spd..0 0 0 0 1 1 2 2 2 2 2 2
20 FT wind gust.2 2 2 3 5 6 8 9 10 10 10 10
Mix hgt (kft)...0.3 0.3 0.3 0.3 0.8 0.8 0.9 1.0 1.0 1.1 1.2 0.2
Transp wind dir.N N N E E E E E E E E E
Transp wind spd.0 1 1 1 1 2 2 3 3 3 3 3
LVORI...........4 4 4 4 5 5 5 5 4 4 4 5
ADI.............1 1 1 1 1 2 3 4 4 5 6 3
Vrate kt-ft/1K..0 0 0 1 1 1 2 3 3 3 4 3
Ventrate Cat....PR PR PR PR PR PR PR PR PR PR PR PR
$$
Forecaster...King
Requested by...Nathan Herron
Type of request...PRESCRIBED
.TAG 2500212.0/FFC
.DELDT 01/08/25
.FormatterVersion 2.0.0
.EMAIL nathan_herron@fws.gov