333
FNUS72 KCAE 171033
FWSCAE

Spot Forecast for SRS Comp 12...USFS Savannah River
National Weather Service Columbia SC
633 AM EDT Thu Apr 17 2025

Forecast is based on ignition time of 0800 EDT on April 17.
If conditions become unrepresentative...contact the National Weather
Service.

.DISCUSSION...
High pressure is in place again today with a strong morning
inversion that will mix out between 9-10am. Winds this morning will
remain out of the east, 5-8 mph with gusts around 12 mph, before
turning out of the southeast early this afternoon with similar
speeds. Persistent dry air will allow for deep mixing again this
afternoon and minimum RH`s down around 25% mid-afternoon. Low level
moisture will return quickly this evening with dew points rising
notably overnight. Some fog near rivers-ponds is possible but
otherwise, fog is not expected Friday morning.

.REST OF TODAY...

Sky/weather.........Sunny (0-10 percent).
Chance of pcpn......0 percent.
Max temperature.....Around 81.
Min humidity........27 percent.
Wind (20 ft)........Light winds.
Mixing height.......6200 ft AGL.
Transport winds.....East 5 to 9 mph shifting to the south around 5
                    mph late in the afternoon.
LVORI...............3.
ADI.................4 to 38.

TIME (EDT)      8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........3   1   1   1   2   5   5   2   2   2
Weather cov.....
Weather type....
Tstm cov........
Chc of pcpn (%).0   0   0   0   0   0   0   0   0   0
Temp............48  54  62  68  73  75  76  78  79  79
RH..............76  67  50  40  33  29  27  25  25  24
Aparnt tmp (F)..48  54  62  68  73  75  76  78  79  79
20 FT wind dir..N   NE  E   E   E   SE  SE  SE  S   S
20 FT wind dir..020 050 070 090 100 120 120 150 160 170
20 FT wind spd..2   2   2   2   2   2   2   2   2   2
20 FT wind gust.7   7   8   9   9   9   8   9   8   8
Mix hgt (kft)...0.5 1.1 2.1 3.2 4.4 5.2 5.8 6.1 6.2 6.0
Transp wind dir.NE  E   E   E   E   SE  SE  S   S   S
Transp wind dir.050 070 080 090 110 120 140 160 170 170
Transp wind spd.5   6   9   8   7   5   5   5   5   5
LVORI...........4   3   2   1   1   2   1   1   1   1
ADI.............4   8   25  33  38  30  33  34  35  34

.TONIGHT...

Sky/weather.........Clear (0-10 percent).
Chance of pcpn......0 percent.
Min temperature.....Around 52.
Max humidity........100 percent.
Wind (20 ft)........Light winds.
Mixing height.......200 ft AGL.
Transport winds.....South 3 to 7 mph.
LVORI...............5.
ADI.................2 to 26.

TIME (EDT)      6 PM   8 PM   10 PM  MIDNGT 2 AM   4 AM
Sky (%).........4      4      2      4      2      1
Weather cov.....
Weather type....NONE   NONE   NONE   NONE   NONE   NONE
Tstm cov........
Chc of pcpn (%).0      0      0      0      0      0
Temp............79     71     64     60     57     55
RH..............24     36     53     63     72     83
Aparnt tmp (F)..79     71     64     60     57     55
20 FT wind......S 2    SE 2   SE 2   SE 2   SE 2   SE 2
20 FT wind gust.7      7      9      9      8      7
20 FT wind dir..170    140    140    150    150    140
Mix hgt (ft)....4600   500    300    600    500    500
Transp wind dir.180    150    160    170    170    160
Transport wind..S 5    SE 3   S 3    S 7    S 3    S 5
LVORI...........2      2      2      3      4      5
ADI.............26     2      2      3      2      2

.FRIDAY...

Sky/weather.........Sunny (0-10 percent).
Chance of pcpn......0 percent.
Max temperature.....Around 85.
Min humidity........35 percent.
Wind (20 ft)........Light winds becoming south 6 to 9 mph in the
                    late morning and afternoon.
Mixing height.......6500 ft AGL.
Transport winds.....South 3 to 7 mph increasing to 13 to 15 mph in
                    the late morning and afternoon.
LVORI...............6.
ADI.................2 early in the morning increasing to 107 in the
                    afternoon.

TIME (EDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........4   3   7   9   5   2   2   2   2   2   2   4
Weather cov.....
Weather type....
Tstm cov........
Chc of pcpn (%).0   0   0   0   0   0   0   0   0   0   0   0
Temp............53  53  58  64  70  75  79  81  83  85  85  85
RH..............96  96  83  73  63  55  49  44  38  36  35  36
Aparnt tmp (F)..53  53  58  64  70  75  79  81  82  84  83  84
20 FT wind dir..SE  SE  SE  S   S   S   S   S   S   S   S   S
20 FT wind dir..130 120 150 160 170 170 170 170 170 170 170 170
20 FT wind spd..2   2   2   3   6   8   8   9   9   9   9   9
20 FT wind gust.7   7   5   7   9   13  13  14  14  14  14  15
Mix hgt (kft)...0.3 0.2 0.5 1.3 2.4 3.4 4.2 4.9 5.5 6.2 6.5 6.0
Transp wind dir.S   S   S   S   S   S   S   S   S   S   S   S
Transp wind dir.160 160 160 170 180 180 180 190 190 190 190 190
Transp wind spd.3   3   3   7   13  15  15  15  14  14  15  15
LVORI...........10  9   9   4   3   1   1   1   1   1   1   1
ADI.............2   3   3   12  39  66  80  85  86  95  107 101

$$
Forecaster...Gropp
Requested by...Chris Hobson
Type of request...PRESCRIBED
.TAG 2510829.0/CAE
.DELDT 04/17/25
.FormatterVersion 2.0.0
.EMAIL christopher.hobson@usda.gov