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

York County, South Carolina, United States

Last updated: 4:13 PM CDT  ·  Refresh
28°C
Feels like 29°
Overcast
▲ 31°  /  ▼ 19°
Wind
4 mph E
Humidity
66%
Dew Point
22°
Pressure
29.28 inHg
Visibility
2 mi
UV Index
3.1
Cloud Cover
89%
Sunrise
6:49 AM
Sunset
8:05 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: York County is currently overcast at 28°C. Precipitation is likely — peak probability 64% around 7 PM. Atmospheric instability is elevated (CAPE up to 1448 J/kg) — isolated convective development possible. Sunrise: 6:49AM · Sunset: 8:05PM.

Alerts

Severe Thunderstorm Watch
Expires 8:00 PM
Severe Thunderstorm Watch
Expires 8:00 PM
47 AQI · Good Dominant: O3 Air Quality
Hourly Forecast · Next 24 Hours
Now
28°
62%
6 PM
28°
58%
7 PM
26°
64%
8 PM
24°
60%
9 PM
24°
58%
10 PM
22°
57%
11 PM
22°
51%
12 AM
22°
56%
1 AM
22°
41%
2 AM
22°
27%
3 AM
21°
27%
4 AM
21°
16%
5 AM
21°
12%
6 AM
19°
12%
7 AM
19°
8%
8 AM
20°
5%
9 AM
20°
16%
10 AM
21°
16%
11 AM
22°
21%
12 PM
24°
21%
1 PM
26°
21%
2 PM
28°
21%
3 PM
28°
31%
4 PM
28°
31%
7-Day Forecast
Today
31° 19°
Overcast with a 62% chance of rain.
Sat
32° 19°
Mostly Cloudy with a 41% chance of rain.
Sun
32° 18°
Clear.
Mon
32° 17°
Mostly Clear with a 45% chance of rain.
Tue
32° 17°
Rain, 43% chance.
Wed
34° 19°
Heavy Rain, 82% chance.
Thu
31° 21°
Rain, 82% chance.
TimeTempConditionsPrecipWindHumidity
Now 28° Overcast 62% 4 mph E 66%
6 PM 28° Overcast 58% 4 mph ESE 73%
7 PM 26° Overcast 64% 6 mph ESE 83%
8 PM 24° Overcast 60% 7 mph E 90%
9 PM 24° Overcast 58% 6 mph E 93%
10 PM 22° Overcast 57% 5 mph E 95%
11 PM 22° Overcast 51% 6 mph ESE 96%
12 AM 22° Overcast 56% 3 mph ESE 97%
1 AM 22° Overcast 41% 3 mph E 97%
2 AM 22° Overcast 27% 3 mph SE 97%
3 AM 21° Mostly Cloudy 27% 3 mph SE 97%
4 AM 21° Mostly Cloudy 16% 3 mph N 97%
5 AM 21° Mostly Cloudy 12% 3 mph N 96%
6 AM 19° Mostly Cloudy 12% 2 mph ENE 96%
7 AM 19° Mostly Cloudy 8% 2 mph E 96%
8 AM 20° Overcast 5% 2 mph E 95%
9 AM 20° Overcast 16% 2 mph ESE 92%
10 AM 21° Overcast 16% 1 mph ESE 90%
11 AM 22° Overcast 21% 1 mph SE 86%
12 PM 24° Mostly Cloudy 21% 1 mph S 80%
1 PM 26° Partly Cloudy 21% 2 mph SW 73%
2 PM 28° Partly Cloudy 21% 2 mph SW 68%
3 PM 28° Partly Cloudy 31% 2 mph SSW 65%
4 PM 28° Partly Cloudy 31% 2 mph SSW 63%
15-Day Forecast
Today
8/21
Overcast
62%
19°
31°
Sat
8/22
Mostly Cloudy
41%
19°
32°
Sun
8/23
Clear
7%
18°
32°
Mon
8/24
Mostly Clear
45%
17°
32°
Tue
8/25
Rain
43%
17°
32°
Wed
8/26
Heavy Rain
82%
19°
34°
Thu
8/27
Rain
82%
21°
31°
Fri
8/28
Drizzle
53%
18°
34°
Sat
8/29
Rain
68%
21°
31°
Sun
8/30
Rain
68%
18°
33°
Mon
8/31
Drizzle
60%
18°
33°
Tue
9/1
Drizzle
60%
22°
35°
Wed
9/2
Drizzle
60%
21°
34°
Thu
9/3
Drizzle
60%
21°
34°
Fri
9/4
Drizzle
60%
21°
33°
47
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
27 AQI 4.9 µg/m³
O3
Ground-level ozone
Dominant
47 AQI 51 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Sat 47 Good 47 27
Sun 43 Good 43 22
Mon 30 Good 30 27
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
SBCAPE1576 J/kg
MLCAPE1069 J/kg
MUCAPE1576 J/kg
SBCIN-18 J/kg
MLCIN-42 J/kg
Lifted Index-5.7
Kinematics
0–6 km Shear20 kt
0–1 km Shear2 kt
Eff. Shear20 kt
0–1 km SRH-3
0–3 km SRH89
Eff. SRH89
Storm Motion278° @ 20 kt
0–1 km EHI-0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell1.5
K-Index39.5
Thermo & Levels
PWAT2.23 in
0–3 km LR6.2 °C/km
700–500 LR6.2 °C/km
Total Totals50.4
LCL918 hPa
LFC822 hPa
EL172 hPa
Freezing Lvl13,812 ft