478
FNUS72 KCAE 121145
FWSCAE

Spot Forecast for SRS COMP 55...USFS SAVANNAH RIVER
National Weather Service Columbia SC
745 AM EDT Wed Mar 12 2025

Forecast is based on ignition time of 0800 EDT on March 12.
If conditions become unrepresentative...contact the National Weather
Service.

.DISCUSSION...
High pressure is shifting offshore today which will lead to
increasing winds generally out of the WSW around 10 mph this
afternoon with gusts into the mid teens possible. The morning inversion
will break between 10 am and 11 am. Temperatures continue to warm
into today which with strong mixing will lead to minimum RH dropping
to around 20 percent by mid to late afternoon. The evening inversion
will set up between 700 pm and 800 pm. Winds aloft should stay
sufficiently high tonight with some high clouds moving in to prevent
widespread fog, although there is the potential for a brief period of
patchy fog along river and creek valleys near sunrise tomorrow morning.

.TODAY...

Sky/weather.........Sunny (0-5 percent).
Chance of pcpn......0 percent.
Max temperature.....Around 80.
Min humidity........20 percent.
Wind (20 ft)........Light winds becoming southwest 5 to 8 mph late
                    in the morning.
Mixing height.......5300 ft AGL.
Transport winds.....West 6 to 15 mph.
LVORI...............3.
ADI.................3 early in the morning increasing to 90 in the
                    afternoon.

TIME (EDT)      8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........0   0   0   0   0   0   1   0   1   1
Weather cov.....
Weather type....
Tstm cov........
Chc of pcpn (%).0   0   0   0   0   0   0   0   0   0
Temp............42  47  56  64  70  75  78  79  80  80
RH..............86  83  64  52  41  32  26  23  21  20
Aparnt tmp (F)..40  46  56  64  70  75  78  79  79  79
20 FT wind dir..W   W   W   W   W   W   SW  SW  SW  SW
20 FT wind dir..260 260 260 260 250 250 240 240 240 230
20 FT wind spd..3   3   3   5   6   7   7   8   8   8
20 FT wind gust.7   9   10  12  12  12  13  13  14  14
Mix hgt (kft)...0.4 0.7 1.0 1.3 2.3 3.3 4.4 4.7 5.1 5.3
Transp wind dir.W   W   W   W   W   W   W   W   W   W
Transp wind dir.270 270 270 270 260 250 250 250 250 250
Transp wind spd.9   8   9   9   12  12  14  14  15  15
LVORI...........5   4   2   2   1   1   1   1   1   1
ADI.............9   8   11  15  32  47  68  76  88  90

.TONIGHT...

Sky/weather.........Mostly clear (0-10 percent).
Chance of pcpn......0 percent.
Min temperature.....Around 48.
Max humidity........93 percent.
Wind (20 ft)........Southwest winds 6 to 7 mph early in the evening
                    becoming light.
Mixing height.......400 ft AGL.
Transport winds.....Southwest 9 to 15 mph.
LVORI...............3.
ADI.................68 early in the evening decreasing to 4 late in
                    the night.

TIME (EDT)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........2   2   4   4   3   4   4   4   4   5   8   10
Weather cov.....
Weather type....
Tstm cov........
Chc of pcpn (%).0   0   0   0   0   0   0   0   0   0   0   0
Temp............79  74  68  65  61  59  58  56  55  52  51  50
RH..............23  28  39  45  53  60  62  66  69  77  77  80
Aparnt tmp (F)..79  74  68  65  61  59  58  56  55  52  51  49
20 FT wind dir..SW  SW  SW  SW  SW  SW  SW  SW  SW  SW  SW  SW
20 FT wind dir..230 220 210 210 210 210 210 220 220 220 230 230
20 FT wind spd..7   6   3   2   3   2   2   3   3   3   3   3
20 FT wind gust.14  10  8   9   9   9   9   8   7   7   7   7
Mix hgt (kft)...3.8 1.0 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4
Transp wind dir.W   SW  SW  SW  SW  SW  SW  SW  SW  SW  SW  SW
Transp wind dir.250 230 220 220 220 230 230 240 240 240 240 240
Transp wind spd.15  12  10  10  10  10  12  12  10  10  9   10
LVORI...........1   2   2   2   2   3   3   3   3   4   4   4
ADI.............68  5   4   5   5   5   5   5   5   5   4   4

.THURSDAY...

Sky/weather.........Mostly sunny (35-45 percent) then becoming
                    mostly cloudy (65-75 percent).
Chance of pcpn......10 percent.
Max temperature.....Around 75.
Min humidity........40 percent.
Wind (20 ft)........Light winds becoming southwest 5 to 6 mph in
                    the afternoon, then becoming light late in the
                    afternoon.
Mixing height.......4900 ft AGL.
Transport winds.....Southwest 8 to 14 mph.
LVORI...............4.
ADI.................4 early in the morning increasing to 72 in the
                    afternoon.

TIME (EDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........17  22  28  38  52  51  48  60  72  71  71  70
Weather cov.....
Weather type....
Tstm cov........
Chc of pcpn (%).0   0   0   0   0   0   0   0   0   0   0   10
Temp............49  49  48  51  58  63  67  70  72  74  75  75
RH..............83  83  93  89  80  70  59  52  48  43  40  40
Aparnt tmp (F)..48  48  48  51  58  63  67  70  72  74  75  75
20 FT wind dir..SW  SW  SW  SW  SW  SW  SW  SW  SW  SW  SW  SW
20 FT wind dir..230 230 240 240 240 230 230 220 220 220 230 230
20 FT wind spd..3   3   2   2   2   3   5   6   6   6   5   3
20 FT wind gust.6   6   8   8   8   9   10  12  13  13  13  12
Mix hgt (kft)...0.3 0.2 0.4 0.7 1.1 1.5 2.4 3.3 4.1 4.5 4.9 4.5
Transp wind dir.SW  W   W   W   SW  SW  SW  SW  SW  SW  SW  SW
Transp wind dir.240 250 250 250 240 230 230 220 230 230 240 240
Transp wind spd.10  9   8   9   9   10  13  13  14  13  13  13
LVORI...........5   4   6   5   4   3   1   1   1   1   1   1
ADI.............4   9   8   9   14  21  37  51  65  67  72  63

$$
Forecaster...Petrolito
Requested by...CHRIS HOBSON
Type of request...PRESCRIBED
.TAG 2506111.0/CAE
.DELDT 03/12/25
.FormatterVersion 2.0.0
.EMAIL christopher.hobson@usda.gov