Severe Thunderstorm Watch 8:00 PM Severe Thunderstorm Watch 8:00 PM

Williamsburg County, South Carolina, United States

Last updated: 4:15 PM CDT  ·  Refresh
34°C
Feels like 38°
Partly Cloudy
▲ 34°  /  ▼ 22°
Wind
6 mph S
Humidity
48%
Dew Point
22°
Pressure
29.85 inHg
Visibility
10 mi
UV Index
6.2
Cloud Cover
34%
Sunrise
6:45 AM
Sunset
7:58 PM
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WeatherAI™ Analysis

WeatherAI Analysis: Williamsburg County is currently partly cloudy at 34°C. Precipitation is likely — peak probability 88% around 8 PM. Atmospheric instability is elevated (CAPE up to 2010 J/kg) — isolated convective development possible. Sunrise: 6:45AM · Sunset: 7:58PM.

Alerts

Severe Thunderstorm Watch
Expires 8:00 PM
Severe Thunderstorm Watch
Expires 8:00 PM
52 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
34°
47%
6 PM
33°
65%
7 PM
31°
80%
8 PM
27°
87%
9 PM
26°
87%
10 PM
24°
86%
11 PM
24°
39%
12 AM
24°
37%
1 AM
24°
47%
2 AM
23°
47%
3 AM
23°
34%
4 AM
23°
32%
5 AM
23°
37%
6 AM
22°
41%
7 AM
22°
46%
8 AM
23°
46%
9 AM
24°
46%
10 AM
27°
47%
11 AM
28°
47%
12 PM
28°
47%
1 PM
29°
47%
2 PM
30°
47%
3 PM
30°
48%
4 PM
29°
48%
7-Day Forecast
Today
34° 22°
Partly Cloudy with a 87% chance of rain.
Sat
33° 22°
Rain, 65% chance.
Sun
33° 21°
Partly Cloudy.
Mon
34° 21°
Partly Cloudy with a 74% chance of rain.
Tue
31° 21°
Rain, 69% chance.
Wed
32° 20°
Heavy Rain, 82% chance.
Thu
32° 22°
Rain, 82% chance.
TimeTempConditionsPrecipWindHumidity
Now 34° Partly Cloudy 47% 6 mph S 48%
6 PM 33° Mostly Cloudy 65% 4 mph S 58%
7 PM 31° Mostly Cloudy 80% 6 mph SE 72%
8 PM 27° Overcast 87% 6 mph NNE 84%
9 PM 26° Rain 87% 6 mph NNE 87%
10 PM 24° Rain 86% 5 mph ENE 88%
11 PM 24° Overcast 39% 4 mph ESE 89%
12 AM 24° Overcast 37% 3 mph ESE 91%
1 AM 24° Overcast 47% 3 mph ENE 92%
2 AM 23° Overcast 47% 4 mph NE 94%
3 AM 23° Mostly Cloudy 34% 2 mph E 94%
4 AM 23° Mostly Cloudy 32% 2 mph E 95%
5 AM 23° Drizzle 37% 3 mph ESE 95%
6 AM 22° Mostly Cloudy 41% 2 mph ESE 94%
7 AM 22° Partly Cloudy 46% 1 mph SW 93%
8 AM 23° Mostly Cloudy 46% 3 mph SW 90%
9 AM 24° Partly Cloudy 46% 3 mph SW 84%
10 AM 27° Rain 47% 4 mph WSW 79%
11 AM 28° Rain 47% 5 mph WSW 74%
12 PM 28° Rain 47% 5 mph WSW 70%
1 PM 29° Rain 47% 5 mph WSW 67%
2 PM 30° Rain 47% 5 mph SW 65%
3 PM 30° Rain 48% 5 mph SW 66%
4 PM 29° Rain 48% 5 mph SW 67%
15-Day Forecast
Today
8/21
Partly Cloudy
87%
22°
34°
Sat
8/22
Rain
65%
22°
33°
Sun
8/23
Partly Cloudy
6%
21°
33°
Mon
8/24
Partly Cloudy
74%
21°
34°
Tue
8/25
Rain
69%
21°
31°
Wed
8/26
Heavy Rain
82%
20°
32°
Thu
8/27
Rain
82%
22°
32°
Fri
8/28
Rain
72%
21°
32°
Sat
8/29
Drizzle
44%
22°
31°
Sun
8/30
Drizzle
51%
21°
33°
Mon
8/31
Drizzle
60%
24°
33°
Tue
9/1
Drizzle
60%
23°
34°
Wed
9/2
Drizzle
60%
23°
34°
Thu
9/3
Drizzle
60%
23°
33°
Fri
9/4
Drizzle
60%
22°
33°
52
Moderate
U.S. Air Quality Index · Dominant: PM2.5
50 100 150 200

Air quality is acceptable. Unusually sensitive people should consider limiting prolonged outdoor exertion.

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
Dominant
52 AQI 9.6 µg/m³
O3
Ground-level ozone
44 AQI 47 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Sat 52 Moderate 44 52
Sun 36 Good 35 36
Mon 44 Good 40 44
About the Air Quality Index
0–50 Good
51–100 Moderate
101–150 Unhealthy for Sensitive Groups
151–200 Unhealthy
201–300 Very Unhealthy
301–500 Hazardous

The U.S. AQI runs 0–500. The overall value equals the highest individual pollutant sub-index, and the dominant pollutant is the one driving it. PM2.5 (fine particles) is reported in µg/m³ and ozone (O3) in ppb. Forecast source: NWS NAQFC.

1000850700500400300250200150100 -40-30-20-10010203040 0.41247101624 LCLLFCEL0°C Temperature (°C) Pressure (hPa)
Temp Dewpoint Parcel (SB) CAPE CIN Dry adiabat Moist adiabat Mixing ratio
RAP
Valid Fri Aug 21, 20:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE2364 J/kg
MLCAPE2117 J/kg
MUCAPE2380 J/kg
SBCIN-3 J/kg
MLCIN-28 J/kg
Lifted Index-6.7
Kinematics
0–6 km Shear13 kt
0–1 km Shear8 kt
Eff. Shear9 kt
0–1 km SRH34
0–3 km SRH72
Eff. SRH72
Storm Motion277° @ 16 kt
0–1 km EHI0.5
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index39.5
Thermo & Levels
PWAT2.31 in
0–3 km LR8.0 °C/km
700–500 LR6.0 °C/km
Total Totals50.7
LCL846 hPa
LFC823 hPa
EL147 hPa
Freezing Lvl15,092 ft