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

Williamsburg County, South Carolina, United States

Last updated: 4:06 PM CDT  ·  Refresh
34°C
Feels like 38°
Partly Cloudy
▲ 34°  /  ▼ 22°
Wind
6 mph SSW
Humidity
46%
Dew Point
22°
Pressure
29.87 inHg
Visibility
10 mi
UV Index
6.5
Cloud Cover
31%
Sunrise
6:45 AM
Sunset
7:58 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Williamsburg County is currently partly cloudy at 34°C. Precipitation is likely — peak probability 86% around 10 PM. Atmospheric instability is elevated (CAPE up to 2019 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°
38%
6 PM
34°
65%
7 PM
32°
70%
8 PM
28°
67%
9 PM
27°
81%
10 PM
26°
86%
11 PM
24°
54%
12 AM
24°
51%
1 AM
23°
47%
2 AM
23°
47%
3 AM
23°
34%
4 AM
23°
30%
5 AM
22°
32%
6 AM
22°
41%
7 AM
22°
46%
8 AM
23°
46%
9 AM
24°
46%
10 AM
26°
47%
11 AM
27°
47%
12 PM
28°
47%
1 PM
29°
47%
2 PM
30°
47%
3 PM
29°
48%
4 PM
31°
53%
7-Day Forecast
Today
34° 22°
Partly Cloudy with a 67% 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 38% 6 mph SSW 46%
6 PM 34° Partly Cloudy 65% 6 mph SSW 56%
7 PM 32° Partly Cloudy 70% 7 mph SSE 69%
8 PM 28° Partly Cloudy 67% 9 mph ENE 84%
9 PM 27° Mostly Cloudy 81% 6 mph E 87%
10 PM 26° Overcast 86% 4 mph ESE 88%
11 PM 24° Rain 54% 5 mph ENE 89%
12 AM 24° Overcast 51% 5 mph E 90%
1 AM 23° Rain 47% 3 mph NE 92%
2 AM 23° Overcast 47% 4 mph NE 93%
3 AM 23° Mostly Cloudy 34% 2 mph E 94%
4 AM 23° Mostly Cloudy 30% 2 mph E 95%
5 AM 22° Drizzle 32% 3 mph ESE 95%
6 AM 22° Mostly Cloudy 41% 2 mph ESE 94%
7 AM 22° Mostly Cloudy 46% 2 mph SE 93%
8 AM 23° Mostly Cloudy 46% 3 mph SSW 91%
9 AM 24° Partly Cloudy 46% 4 mph SSW 85%
10 AM 26° Partly Cloudy 47% 5 mph SW 79%
11 AM 27° Rain 47% 5 mph SW 74%
12 PM 28° Rain 47% 6 mph SW 71%
1 PM 29° Rain 47% 6 mph SW 68%
2 PM 30° Rain 47% 6 mph SW 64%
3 PM 29° Rain 48% 6 mph SW 66%
4 PM 31° Rain 53% 5 mph SW 67%
15-Day Forecast
Today
8/21
Partly Cloudy
67%
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°
34°
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, 19:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE2779 J/kg
MLCAPE2660 J/kg
MUCAPE2905 J/kg
SBCIN0 J/kg
MLCIN-17 J/kg
Lifted Index-6.6
Kinematics
0–6 km Shear8 kt
0–1 km Shear1 kt
Eff. Shear7 kt
0–1 km SRH1
0–3 km SRH50
Eff. SRH50
Storm Motion274° @ 17 kt
0–1 km EHI0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index39.4
Thermo & Levels
PWAT2.50 in
0–3 km LR8.4 °C/km
700–500 LR5.7 °C/km
Total Totals50.9
LCL846 hPa
LFC1011 hPa
EL151 hPa
Freezing Lvl14,957 ft