Severe Thunderstorm Warning — Chesterfield County, SC, Lancaster County, SC 4:45 p. m. Severe Thunderstorm Watch 8:00 p. m. Severe Thunderstorm Watch 8:00 p. m.

Lancaster County, South Carolina, United States

Last updated: 4:13 p. m. CDT  ·  Refresh
28°C
Feels like 32°
Mostly Cloudy
▲ 31°  /  ▼ 19°
Wind
6 mph SE
Humidity
75%
Dew Point
23°
Pressure
29,33 inHg
Visibility
9 mi
UV Index
4,1
Cloud Cover
79%
Sunrise
6:47 a. m.
Sunset
8:03 p. m.
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WeatherAI™ Analysis

WeatherAI Analysis: Lancaster County is currently mostly cloudy at 28°C. Precipitation is likely — peak probability 78% around 9 p. m.. Atmospheric instability is elevated (CAPE up to 1586 J/kg) — isolated convective development possible. Sunrise: 6:47A. M. · Sunset: 8:03P. M..

Alerts

Severe Thunderstorm Warning
Chesterfield County, SC, Lancaster County, SC
Expires 4:45 p. m.
Severe Thunderstorm Watch
Expires 8:00 p. m.
Severe Thunderstorm Watch
Expires 8:00 p. m.
39 AQI · Good Dominant: O3 Air Quality
Hourly Forecast · Next 24 Hours
Now
28°
76%
6 p. m.
26°
77%
7 p. m.
26°
78%
8 p. m.
24°
71%
9 p. m.
24°
78%
10 p. m.
23°
59%
11 p. m.
22°
69%
12 a. m.
22°
69%
1 a. m.
22°
68%
2 a. m.
22°
49%
3 a. m.
21°
49%
4 a. m.
21°
36%
5 a. m.
21°
11%
6 a. m.
19°
11%
7 a. m.
19°
12%
8 a. m.
19°
25%
9 a. m.
21°
22%
10 a. m.
22°
12%
11 a. m.
23°
12%
12 p. m.
24°
12%
1 p. m.
26°
18%
2 p. m.
28°
18%
3 p. m.
28°
22%
4 p. m.
29°
20%
7-Day Forecast
Today
31° 19°
Mostly Cloudy with a 76% chance of rain.
Sat
32° 19°
Mostly Cloudy with a 49% chance of rain.
Sun
33° 19°
Clear.
Mon
33° 18°
Partly Cloudy with a 45% chance of rain.
Tue
33° 18°
Drizzle, 51% chance.
Wed
34° 19°
Rain, 70% chance.
Thu
32° 22°
Rain, 82% chance.
TimeTempConditionsPrecipWindHumidity
Now 28° Mostly Cloudy 76% 6 mph SE 75%
6 p. m. 26° Rain 77% 8 mph S 84%
7 p. m. 26° Rain 78% 6 mph SE 89%
8 p. m. 24° Rain 71% 7 mph E 93%
9 p. m. 24° Overcast 78% 6 mph E 94%
10 p. m. 23° Overcast 59% 6 mph ESE 94%
11 p. m. 22° Overcast 69% 7 mph ESE 95%
12 a. m. 22° Overcast 69% 6 mph ESE 96%
1 a. m. 22° Rain 68% 4 mph SE 97%
2 a. m. 22° Mostly Cloudy 49% 4 mph SSE 97%
3 a. m. 21° Mostly Cloudy 49% 4 mph SSE 97%
4 a. m. 21° Overcast 36% 3 mph S 98%
5 a. m. 21° Mostly Cloudy 11% 3 mph NNW 98%
6 a. m. 19° Mostly Cloudy 11% 2 mph ENE 98%
7 a. m. 19° Mostly Cloudy 12% 2 mph E 97%
8 a. m. 19° Mostly Cloudy 25% 2 mph E 96%
9 a. m. 21° Overcast 22% 2 mph ESE 92%
10 a. m. 22° Overcast 12% 2 mph SE 89%
11 a. m. 23° Mostly Cloudy 12% 2 mph SSE 86%
12 p. m. 24° Mostly Cloudy 12% 2 mph SW 81%
1 p. m. 26° Mostly Cloudy 18% 2 mph WSW 77%
2 p. m. 28° Rain 18% 3 mph WSW 72%
3 p. m. 28° Partly Cloudy 22% 3 mph WSW 69%
4 p. m. 29° Partly Cloudy 20% 4 mph WSW 65%
15-Day Forecast
Today
8/21
Mostly Cloudy
76%
19°
31°
Sat
8/22
Mostly Cloudy
49%
19°
32°
Sun
8/23
Clear
7%
19°
33°
Mon
8/24
Partly Cloudy
45%
18°
33°
Tue
8/25
Drizzle
51%
18°
33°
Wed
8/26
Rain
70%
19°
34°
Thu
8/27
Rain
82%
22°
32°
Fri
8/28
Drizzle
53%
19°
34°
Sat
8/29
Drizzle
44%
22°
32°
Sun
8/30
Drizzle
51%
20°
34°
Mon
8/31
Drizzle
60%
22°
34°
Tue
9/1
Drizzle
60%
22°
36°
Wed
9/2
Drizzle
60%
22°
35°
Thu
9/3
Drizzle
60%
21°
34°
Fri
9/4
Drizzle
60%
21°
34°
39
Good
U.S. Air Quality Index · Dominant: O3
50 100 150 200

Air quality is satisfactory and poses little or no health risk.

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
30 AQI 5.4 µg/m³
O3
Ground-level ozone
Dominant
39 AQI 43 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Sat 39 Good 39 30
Sun 42 Good 42 22
Mon 36 Good 36 28
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 vie. ago. 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
SBCAPE2179 J/kg
MLCAPE2024 J/kg
MUCAPE2197 J/kg
SBCIN-10 J/kg
MLCIN-10 J/kg
Lifted Index-6.2
Kinematics
0–6 km Shear15 kt
0–1 km Shear1 kt
Eff. Shear14 kt
0–1 km SRH-3
0–3 km SRH71
Eff. SRH71
Storm Motion290° @ 15 kt
0–1 km EHI-0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index42.7
Thermo & Levels
PWAT2.46 in
0–3 km LR6.5 °C/km
700–500 LR5.8 °C/km
Total Totals51.0
LCL921 hPa
LFC867 hPa
EL157 hPa
Freezing Lvl13,976 ft