Severe Thunderstorm Watch 8:00 p. m. Severe Thunderstorm Watch 8:00 p. m.

Lancaster County, South Carolina, United States

Last updated: 6:32 p. m. CDT  ·  Refresh
23°C
Feels like 26°
Fog
▲ 31°  /  ▼ 19°
Wind
6 mph E
Humidity
94%
Dew Point
22°
Pressure
29,36 inHg
Visibility
0 mi
UV Index
0,6
Cloud Cover
94%
Sunrise
6:47 a. m.
Sunset
8:03 p. m.
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Lancaster County is currently fog at 23°C. Precipitation is likely — peak probability 84% around 7 p. m.. Atmospheric instability is elevated (CAPE up to 1362 J/kg) — isolated convective development possible. Sunrise: 6:47A. M. · Sunset: 8:03P. M..

Alerts

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
23°
83%
8 p. m.
24°
60%
9 p. m.
23°
67%
10 p. m.
22°
68%
11 p. m.
22°
62%
12 a. m.
22°
57%
1 a. m.
22°
52%
2 a. m.
21°
34%
3 a. m.
21°
34%
4 a. m.
21°
34%
5 a. m.
19°
34%
6 a. m.
19°
24%
7 a. m.
19°
24%
8 a. m.
20°
21%
9 a. m.
22°
21%
10 a. m.
22°
24%
11 a. m.
23°
25%
12 p. m.
24°
12%
1 p. m.
27°
9%
2 p. m.
28°
14%
3 p. m.
28°
21%
4 p. m.
28°
21%
5 p. m.
28°
21%
6 p. m.
28°
24%
7-Day Forecast
Tonight
31° 19°
Fog with a 83% chance of rain.
Sat
31° 19°
Mostly Cloudy with a 52% chance of rain.
Sun
32° 20°
Mostly Clear.
Mon
31° 18°
Clear with a 53% chance of rain.
Tue
32° 18°
Drizzle, 45% chance.
Wed
32° 19°
Heavy Rain, 80% chance.
Thu
31° 20°
Rain, 90% chance.
TimeTempConditionsPrecipWindHumidity
Now 23° Fog 83% 6 mph E 94%
8 p. m. 24° Overcast 60% 6 mph E 95%
9 p. m. 23° Overcast 67% 6 mph ESE 95%
10 p. m. 22° Overcast 68% 6 mph ESE 96%
11 p. m. 22° Overcast 62% 5 mph SE 97%
12 a. m. 22° Mostly Cloudy 57% 4 mph SSE 97%
1 a. m. 22° Mostly Cloudy 52% 3 mph SSE 97%
2 a. m. 21° Mostly Cloudy 34% 2 mph S 98%
3 a. m. 21° Mostly Cloudy 34% 2 mph SSW 98%
4 a. m. 21° Overcast 34% 2 mph WSW 98%
5 a. m. 19° Fog 34% 2 mph WSW 98%
6 a. m. 19° Fog 24% 3 mph ESE 97%
7 a. m. 19° Rain 24% 3 mph ESE 96%
8 a. m. 20° Overcast 21% 3 mph SE 94%
9 a. m. 22° Overcast 21% 2 mph SSW 90%
10 a. m. 22° Overcast 24% 2 mph WSW 87%
11 a. m. 23° Overcast 25% 2 mph WSW 83%
12 p. m. 24° Overcast 12% 2 mph WSW 78%
1 p. m. 27° Mostly Cloudy 9% 3 mph WSW 73%
2 p. m. 28° Mostly Cloudy 14% 3 mph WSW 69%
3 p. m. 28° Mostly Cloudy 21% 3 mph WSW 66%
4 p. m. 28° Mostly Cloudy 21% 3 mph WSW 63%
5 p. m. 28° Partly Cloudy 21% 2 mph WSW 64%
6 p. m. 28° Mostly Clear 24% 3 mph SW 66%
15-Day Forecast
Today
8/21
Fog
83%
19°
31°
Sat
8/22
Mostly Cloudy
52%
19°
31°
Sun
8/23
Mostly Clear
19%
20°
32°
Mon
8/24
Clear
53%
18°
31°
Tue
8/25
Drizzle
45%
18°
32°
Wed
8/26
Heavy Rain
80%
19°
32°
Thu
8/27
Rain
90%
20°
31°
Fri
8/28
Rain
63%
22°
32°
Sat
8/29
Rain
73%
20°
33°
Sun
8/30
Rain
72%
19°
33°
Mon
8/31
Drizzle
68%
19°
37°
Tue
9/1
Drizzle
60%
22°
36°
Wed
9/2
Drizzle
60%
22°
33°
Thu
9/3
Drizzle
60%
22°
33°
Fri
9/4
Rain
90%
21°
32°
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, 22:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE441 J/kg
MLCAPE599 J/kg
MUCAPE1519 J/kg
SBCIN-110 J/kg
MLCIN-75 J/kg
Lifted Index-2.5
Kinematics
0–6 km Shear19 kt
0–1 km Shear11 kt
Eff. Shear21 kt
0–1 km SRH50
0–3 km SRH91
Eff. SRH91
Storm Motion274° @ 21 kt
0–1 km EHI0.1
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell1.5
K-Index34.8
Thermo & Levels
PWAT2.21 in
0–3 km LR5.0 °C/km
700–500 LR5.4 °C/km
Total Totals45.3
LCL981 hPa
LFC767 hPa
EL349 hPa
Freezing Lvl13,753 ft