Text Products for FWS Issued by FFC

Spot Forecast
Issued by NWS Atlanta, GA
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FNUS72 KFFC 180850
FWSFFC

Spot Forecast for 191...USFS
National Weather Service Peachtree City GA
450 AM EDT Thu Apr 18 2024

Forecast is based on ignition time of 0800 EDT on April 18.
If conditions become unrepresentative...contact the National Weather
Service.

.DISCUSSION...

Rainfall totals across Greene County yesterday were less than
0.1", so with no additional precipitation forecast today, conditions
are likely to remain sufficiently dry. With LVORI forecast to max
out between 6 to 8 this morning, patchy dense fog is possible
through daybreak. Any fog that develops should dissipate between 9
and 10AM. Initially partly cloudy skies this morning will give
way to a mostly sunny to sunny afternoon. Minimum relative
humidity will drop to 35 to 38 percent by mid- afternoon. 20-ft
winds will be very light (4 mph or less) and variable. Transport
winds initially light out of the southwest this morning will shift
to the northwest at 6-8 mph by 11AM to noon. Under clearing skies,
mixing heights will max out between 6-7kft. Ventilation rates will
be poor owing to weak winds.

Overnight, rain chances (25 to 35 percent) will return between 3
and 4AM. and linger through the remainder of the day. Isolated to
scattered thunderstorms are possible, capable of producing gusty,
erratic winds and locally heavy rainfall. LVORI will be
sufficiently high once again on Friday morning (7-8), so cannot
rule out patchy dense fog development with increased moisture.
Rainfall totals between 0.25-0.3" are expected over the course of
the day. 20-ft winds will be west at 5-8 mph, and transport winds
will be 7-12 mph out of the same direction.


.REST OF TODAY...

Sky/weather.........Sunny (10-20 percent).
CWR.................0 percent.
LAL.................1.
Max temperature.....Around 88.
Min humidity........35 percent.
Dewpoint............60 increasing to 63 in the late morning and
                    early afternoon, then decreasing to 58 late in
                    the afternoon.
Wind (20 ft)........Light winds.
Mixing height.......6600 ft AGL.
Transport winds.....West 2 to 5 mph shifting to the northwest 6 to
                    7 mph late in the morning, then shifting to the
                    southwest 3 to 5 mph in the afternoon.
Smoke dispersal.....Poor (900 knot-ft) early in the morning
                    increasing to fair (24200 knot-ft) in the
                    afternoon.
LVORI...............4.
ADI.................2 to 34.
Haines Index........3 to 5 or very low to moderate potential for
                    large plume dominated fire growth.
Pcpn amount.........0.00 inches.
CEILING (KFT).......25.

TIME (EDT)      8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........23  14  9   3   3   2   4   4   5   5
Weather cov.....
Weather type....
Tstm cov........
CWR.............0   0   0   0   0   0   0   0   0   0
LAL.............1   1   1   1   1   1   1   1   1   1
Temp............62  66  71  76  80  83  85  86  87  87
Dewpoint........59  62  64  65  63  62  60  59  58  57
RH..............93  85  78  68  56  49  43  40  37  35
20 FT wind dir..SW  W   NW  NW  W   W   S   S   S   SW
20 FT wind spd..1   2   3   3   3   2   3   3   3   3
20 FT wind gust.3   5   6   6   6   5   6   7   6   6
Mix hgt (kft)...0.4 0.8 1.8 2.6 3.4 5.1 5.9 6.0 6.4 6.6
Transp wind dir.SW  W   NW  NW  W   SW  S   S   SW  SW
Transp wind spd.2   5   6   7   6   5   3   3   3   5
LVORI...........6   5   4   3   2   1   2   2   1   1
ADI.............2   5   14  23  27  30  26  27  31  34
Haines index....3   3   3   4   4   4   5   5   5   4
Vrate kt-ft/1K..1   4   12  15  16  18  19  20  23  24
Ventrate Cat....PR  PR  PR  PR  PR  PR  PR  PR  PR  PR
Ceiling (kft)...25  25  25  25  25  25  25  25  25  25

.TONIGHT...

Sky/weather.........Mostly clear (15-25 percent). Slight chance of
                    showers after 3 am. Slight chance of
                    thunderstorms after 3 am. Chance of showers
                    early in the morning.
CWR.................10 percent increasing to 30 percent.
LAL.................1 until 0400, then 2.
Min temperature.....Around 63.
Max humidity........98 percent.
Dewpoint............60 increasing to 62 late in the evening.
Wind (20 ft)........Southwest winds around 5 mph early in the
                    evening becoming light. Gusty and erratic winds
                    expected near thunderstorms after 3 am.
Mixing height.......200 ft AGL.
Transport winds.....Southwest 3 to 5 mph.
Smoke dispersal.....Fair (18400 knot-ft) early in the evening
                    decreasing to poor (600 knot-ft) late in the
                    night.
LVORI...............4.
ADI.................1 to 24.
Haines Index........3 to 4 or very low to low potential for large
                    plume dominated fire growth.
Pcpn amount.........0.21 inches.
CEILING (KFT).......25 decreasing to 10.

TIME (EDT)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........6   6   4   11  13  15  27  23  37  25  28  40
Weather cov.....                                        SCH CHC
Weather type....                                        RW  RW
Tstm cov........                                        SCH SCH
CWR.............0   0   0   0   0   0   0   0   10  10  20  30
LAL.............1   1   1   1   1   1   1   1   1   1   2   2
Temp............86  83  79  75  72  70  68  67  67  66  65  64
Dewpoint........58  59  62  62  62  63  63  62  62  63  63  63
RH..............38  43  56  66  71  78  82  85  87  91  94  94
20 FT wind dir..SW  SW  S   S   S   S   SW  SW  SW  SW  SW  SW
20 FT wind spd..5   3   2   2   2   3   2   3   3   3   3   3
20 FT wind gust.7   5   5   5   5   6   5   6   7   6   6   6
Mix hgt (kft)...4.8 1.9 0.4 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2
Transp wind dir.SW  S   S   S   S   S   S   SW  SW  SW  SW  SW
Transp wind spd.3   3   3   3   3   3   5   5   5   5   5   5
LVORI...........2   2   3   3   3   4   5   5   5   6   6   6
ADI.............24  2   1   2   2   2   2   2   2   2   2   2
Haines index....4   4   4   4   4   4   4   4   4   4   4   3
Vrate kt-ft/1K..18  7   1   1   1   1   1   1   1   1   1   1
Ventrate Cat....PR  PR  PR  PR  PR  PR  PR  PR  PR  PR  PR  PR
Ceiling (kft)...25  25  25  25  25  25  25  25  20  20  15  10

.FRIDAY...

Sky/weather.........Mostly sunny (40-50 percent). Slight chance of
                    thunderstorms early in the morning. Chance of
                    showers through the day. Slight chance of
                    thunderstorms late in the afternoon.
CWR.................30 percent.
LAL.................2 until 1000, then 1 until 1400, then 2.
Max temperature.....Around 86.
Min humidity........49 percent.
Dewpoint............65.
Wind (20 ft)........Light winds becoming west 5 to 8 mph in the
                    late morning and afternoon. Gusty and erratic
                    winds expected near thunderstorms early in the
                    morning. Gusty and erratic winds expected near
                    thunderstorms late in the afternoon.
Mixing height.......6000 ft AGL.
Transport winds.....West 3 to 12 mph.
Smoke dispersal.....Poor (900 knot-ft) early in the morning
                    increasing to good (56700 knot-ft) in the
                    afternoon.
LVORI...............5.
ADI.................2 early in the morning increasing to 73 in the
                    afternoon.
Haines Index........3 to 4 or very low to low potential for large
                    plume dominated fire growth.
Pcpn amount.........0.14 inches.
CEILING (KFT).......8.0 decreasing to 7.0 early in the morning,
                    then increasing to 9.0 early in the morning
                    increasing to 10 late in the morning decreasing
                    to 6.0 decreasing to 3.0 late in the morning
                    increasing to 4.0 increasing to 7.0 early in
                    the afternoon increasing to 12 increasing to 20
                    late in the afternoon increasing to 25.

TIME (EDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........32  34  50  52  57  60  53  38  39  34  41  45
Weather cov.....CHC CHC CHC CHC CHC CHC CHC CHC CHC CHC CHC CHC
Weather type....RW  RW  RW  RW  RW  RW  RW  RW  RW  RW  RW  RW
Tstm cov........SCH SCH SCH SCH                 SCH SCH SCH SCH
CWR.............30  30  30  30  30  30  30  30  30  30  30  30
LAL.............2   2   2   2   1   1   1   1   2   2   2   2
Temp............65  64  65  70  74  77  80  82  84  85  86  85
Dewpoint........63  64  64  65  66  67  67  66  66  65  65  64
RH..............96  98  97  85  77  70  64  59  55  51  49  49
20 FT wind dir..SW  SW  SW  SW  W   W   W   W   W   W   W   W
20 FT wind spd..3   3   3   5   5   6   7   8   8   8   8   7
20 FT wind gust.7   6   6   7   9   10  13  14  14  14  14  13
Mix hgt (kft)...0.2 0.2 0.4 0.8 2.2 2.8 3.6 5.2 6.0 5.7 5.1 4.8
Transp wind dir.SW  SW  SW  SW  W   W   W   W   W   W   W   W
Transp wind spd.5   3   5   6   7   8   9   10  10  12  12  10
LVORI...........8   8   7   4   3   3   1   1   1   1   1   1
ADI.............2   4   4   6   19  27  35  62  73  73  67  61
Haines index....3   3   3   3   3   4   4   4   4   4   4   4
Vrate kt-ft/1K..1   1   1   6   16  21  30  48  57  54  48  45
Ventrate Cat....PR  PR  PR  PR  PR  PR  PR  FR  FR  FR  FR  FR
Ceiling (kft)...8.0 7.0 9.0 10  6.0 3.0 3.0 4.0 7.0 12  20  25

$$
Forecaster...LMarlow
Requested by...Tim Kolnik
Type of request...PRESCRIBED
.TAG 2411254.0/FFC
.DELDT 04/17/24
.FormatterVersion 2.0.0
.EMAIL timothy.kolnik@usda.gov
National Weather Service Weather Forecast Office
