819
FNUS72 KFFC 040843
FWSFFC

Spot Forecast for 2D/3F...USFWS
National Weather Service Peachtree City GA
443 AM EDT Fri Apr 4 2025

Forecast is based on ignition time of 1000 EDT on April 04.
If conditions become unrepresentative...contact the National Weather
Service.

.DISCUSSION...

Good morning, Nathan. Warm conditions are expected at the burn site
underneath partly to mostly cloudy skies, with temperatures climbing
over 80 between 11 AM and 12 PM and rising to a high of 88 in the
mid to late afternoon. Relative humidity values will be above 80
percent at ignition time, and remain above 50 percent through the
early afternoon. A minimum RH of 45 percent is forecast by 5 PM this
afternoon. 20 ft winds will be S throughout the day at the burn
site, at 3 mph or less throughout the morning and increasing to 5
mph after 1 PM. Transport winds at the burn site will be S at 10-15
mph. Mixing heights this afternoon will increase to above 6000 ft by
3 PM and into the late afternoon. Surface winds will become S/SE at
3 mph tonight and into early Saturday morning as the atmosphere
decouples. With ample low-level moisture, RH values will rise to as
high as 97 percent early Saturday morning. These light winds and
high RH values could be favorable for the development of patchy fog
around the burn site, as indicated by LVORI of 7-8. Patchy fog will
be most likely between 6-9 AM on Saturday. Please feel free to
contact us if you have any further questions or concerns.

.REST OF TODAY...

Sky/weather.........Partly sunny (65-75 percent).
Max temperature.....Around 88.
Min humidity........45 percent.
Dewpoint............66.
Wind (20 ft)........Light winds becoming south around 5 mph in the
                    afternoon.
Mixing height.......6300 ft AGL.
Transport winds.....South 10 to 14 mph.
Smoke dispersal.....Fair (26200 knot-ft) early in the morning
                    increasing to good (56300 knot-ft) in the
                    afternoon.
LVORI...............3.
ADI.................32 early in the morning increasing to 81 in the
                    afternoon.

TIME (EDT)      10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........63  63  66  64  68  73  69  71
Weather cov.....
Weather type....
Tstm cov........
Temp............73  78  82  84  86  87  88  88
Dewpoint........68  68  68  67  66  65  65  64
RH..............84  71  63  57  52  49  47  45
20 FT wind dir..S   S   S   S   S   S   S   S
20 FT wind spd..1   2   3   5   5   5   5   5
20 FT wind gust.9   10  12  13  13  13  14  13
Mix hgt (kft)...2.3 3.0 3.7 5.2 5.9 6.0 6.2 6.3
Transp wind dir.S   S   S   S   S   S   S   S
Transp wind spd.10  14  14  12  10  10  10  10
LVORI...........4   3   1   1   1   1   1   1
ADI.............32  50  58  63  68  70  81  79
Vrate kt-ft/1K..26  35  39  48  53  54  55  56
Ventrate Cat....PR  PR  PR  FR  FR  FR  FR  FR

.TONIGHT...

Sky/weather.........Mostly cloudy (60-70 percent) then becoming
                    partly cloudy (35-45 percent) then becoming
                    mostly cloudy (50-60 percent) then becoming
                    partly cloudy (40-50 percent).
Min temperature.....Around 64.
Max humidity........97 percent.
Dewpoint............65.
Wind (20 ft)........Light winds.
Mixing height.......200 ft AGL.
Transport winds.....South 2 to 8 mph.
Smoke dispersal.....Good (42300 knot-ft) early in the evening
                    decreasing to poor (400 knot-ft) late in the
                    night.
LVORI...............4.
ADI.................1 to 33.

TIME (EDT)      6 PM   8 PM   10 PM  MIDNGT 2 AM   4 AM
Sky (%).........60     63     46     37     44     53
Weather cov.....
Weather type....NONE   NONE   NONE   NONE   NONE   NONE
Tstm cov........
Temp............87     82     75     72     71     67
Dewpoint........64     66     65     66     66     65
RH..............47     58     72     81     85     93
20 ft wind......S 3    SE 1   SE 1   S 1    S 1    SE 1
20 ft wind gust.12     9      8      8      9      8
Mix hgt (ft)....3200   200    200    200    200    200
Transport wind..S 8    SE 2   SE 2   S 2    S 2    S 2
LVORI...........1      3      4      5      5      7
ADI.............33     1      1      1      1      1
Vrate kt-ft/1K..42     1      1      0      0      0
Ventrate Cat....FAIR   POOR   POOR   POOR   POOR   POOR

.SATURDAY...

Sky/weather.........Mostly sunny (35-45 percent).
Max temperature.....Around 88.
Min humidity........39 percent.
Dewpoint............64 decreasing to 60 late in the afternoon.
Wind (20 ft)........Light winds becoming south 5 to 6 mph late in
                    the morning.
Mixing height.......6200 ft AGL.
Transport winds.....Southeast 1 to 6 mph increasing to southwest 12
                    to 16 mph in the late morning and afternoon.
Smoke dispersal.....Poor (400 knot-ft) early in the morning
                    increasing to excellent (82300 knot-ft) in the
                    afternoon.
LVORI...............5.
ADI.................1 early in the morning increasing to 110 in the
                    afternoon.

TIME (EDT)      6 AM   8 AM   10 AM  NOON   2 PM   4 PM
Sky (%).........41     48     32     44     47     36
Weather cov.....
Weather type....NONE   NONE   NONE   NONE   NONE   NONE
Tstm cov........
Temp............66     65     73     81     86     88
Dewpoint........64     64     66     65     62     60
RH..............95     95     77     58     46     40
20 ft wind......SE 1   SE 1   S 3    S 5    S 6    S 6
20 ft wind gust.8      8      12     14     17     18
Mix hgt (ft)....200    200    2200   3600   5800   6100
Transport wind..S 1    SE 2   S 12   SW 16  SW 15  S 16
LVORI...........8      7      3      1      1      1
ADI.............1      2      32     74     102    109
Vrate kt-ft/1K..0      0      29     47     75     81
Ventrate Cat....POOR   POOR   POOR   FAIR   GOOD   GOOD

$$
Forecaster...King
Requested by...Nathan Herron
Type of request...PRESCRIBED
.TAG 2508830.0/FFC
.DELDT 04/04/25
.FormatterVersion 2.0.0
.EMAIL nathan_herron@fws.gov,carl_schmidt@fws.gov