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

Marion County, South Carolina, United States

Last updated: 4:04 PM CDT  ·  Refresh
32°C
Feels like 40°
Mostly Cloudy
▲ 33°  /  ▼ 22°
Wind
6 mph ESE
Humidity
68%
Dew Point
24°
Pressure
29.89 inHg
Visibility
10 mi
UV Index
5.5
Cloud Cover
62%
Sunrise
6:43 AM
Sunset
7:57 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Marion County is currently mostly cloudy at 32°C. Precipitation is likely — peak probability 90% around 7 PM. Atmospheric instability is elevated (CAPE up to 2014 J/kg) — isolated convective development possible. Sunrise: 6:43AM · Sunset: 7:57PM.

Alerts

Severe Thunderstorm Watch
Expires 8:00 PM
Severe Thunderstorm Watch
Expires 8:00 PM
51 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
32°
62%
6 PM
31°
83%
7 PM
27°
90%
8 PM
25°
90%
9 PM
25°
90%
10 PM
24°
90%
11 PM
23°
75%
12 AM
23°
71%
1 AM
23°
57%
2 AM
23°
46%
3 AM
23°
33%
4 AM
23°
37%
5 AM
23°
33%
6 AM
22°
36%
7 AM
22°
41%
8 AM
22°
53%
9 AM
23°
53%
10 AM
26°
57%
11 AM
26°
57%
12 PM
27°
57%
1 PM
28°
57%
2 PM
31°
57%
3 PM
31°
57%
4 PM
32°
53%
7-Day Forecast
Today
33° 22°
Mostly Cloudy with a 90% chance of rain.
Sat
34° 22°
Rain, 65% chance.
Sun
33° 21°
Partly Cloudy.
Mon
34° 21°
Mostly Clear with a 60% chance of rain.
Tue
32° 21°
Drizzle, 51% chance.
Wed
33° 20°
Rain, 70% chance.
Thu
33° 22°
Rain, 82% chance.
TimeTempConditionsPrecipWindHumidity
Now 32° Mostly Cloudy 62% 6 mph ESE 68%
6 PM 31° Partly Cloudy 83% 6 mph E 74%
7 PM 27° Overcast 90% 9 mph ENE 82%
8 PM 25° Thunderstorm 90% 10 mph NNE 90%
9 PM 25° Heavy Rain 90% 10 mph ENE 92%
10 PM 24° Thunderstorm 90% 8 mph E 94%
11 PM 23° Thunderstorm 75% 9 mph ESE 95%
12 AM 23° Heavy Rain 71% 5 mph ESE 95%
1 AM 23° Rain 57% 3 mph ENE 95%
2 AM 23° Rain 46% 5 mph NNE 95%
3 AM 23° Mostly Cloudy 33% 3 mph ESE 96%
4 AM 23° Mostly Cloudy 37% 2 mph E 96%
5 AM 23° Mostly Cloudy 33% 3 mph SE 96%
6 AM 22° Mostly Cloudy 36% 3 mph ESE 95%
7 AM 22° Mostly Cloudy 41% 2 mph ESE 95%
8 AM 22° Partly Cloudy 53% 3 mph NNW 93%
9 AM 23° Partly Cloudy 53% 3 mph W 87%
10 AM 26° Partly Cloudy 57% 4 mph W 80%
11 AM 26° Rain 57% 4 mph WSW 74%
12 PM 27° Rain 57% 5 mph WSW 71%
1 PM 28° Rain 57% 5 mph WSW 69%
2 PM 31° Rain 57% 5 mph WSW 66%
3 PM 31° Rain 57% 5 mph WSW 66%
4 PM 32° Rain 53% 5 mph WSW 66%
15-Day Forecast
Today
8/21
Mostly Cloudy
90%
22°
33°
Sat
8/22
Rain
65%
22°
34°
Sun
8/23
Partly Cloudy
6%
21°
33°
Mon
8/24
Mostly Clear
60%
21°
34°
Tue
8/25
Drizzle
51%
21°
32°
Wed
8/26
Rain
70%
20°
33°
Thu
8/27
Rain
82%
22°
33°
Fri
8/28
Rain
82%
20°
33°
Sat
8/29
Rain
68%
22°
32°
Sun
8/30
Drizzle
51%
22°
34°
Mon
8/31
Drizzle
60%
24°
34°
Tue
9/1
Drizzle
60%
23°
35°
Wed
9/2
Drizzle
60%
23°
34°
Thu
9/3
Drizzle
60%
22°
34°
Fri
9/4
Drizzle
60%
22°
33°
51
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
51 AQI 9.3 µg/m³
O3
Ground-level ozone
44 AQI 47 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Sat 51 Moderate 44 51
Sun 39 Good 39 33
Mon 43 Good 38 43
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
SBCAPE3613 J/kg
MLCAPE2475 J/kg
MUCAPE3613 J/kg
SBCIN-1 J/kg
MLCIN-31 J/kg
Lifted Index-7.7
Kinematics
0–6 km Shear18 kt
0–1 km Shear7 kt
Eff. Shear17 kt
0–1 km SRH38
0–3 km SRH72
Eff. SRH72
Storm Motion275° @ 18 kt
0–1 km EHI0.9
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index40.2
Thermo & Levels
PWAT2.48 in
0–3 km LR7.7 °C/km
700–500 LR5.4 °C/km
Total Totals49.2
LCL901 hPa
LFC891 hPa
EL142 hPa
Freezing Lvl14,521 ft