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

Marion County, South Carolina, United States

Last updated: 4:13 PM CDT  ·  Refresh
29°C
Feels like 34°
Mostly Cloudy
▲ 33°  /  ▼ 21°
Wind
6 mph E
Humidity
69%
Dew Point
23°
Pressure
29.89 inHg
Visibility
10 mi
UV Index
4.0
Cloud Cover
80%
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 30°C. Precipitation is likely — peak probability 90% around 6 PM. Atmospheric instability is elevated (CAPE up to 2189 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
29°
77%
6 PM
28°
90%
7 PM
27°
90%
8 PM
24°
90%
9 PM
24°
90%
10 PM
23°
90%
11 PM
23°
71%
12 AM
23°
71%
1 AM
23°
57%
2 AM
23°
46%
3 AM
23°
33%
4 AM
23°
41%
5 AM
23°
33%
6 AM
21°
36%
7 AM
22°
41%
8 AM
22°
42%
9 AM
24°
42%
10 AM
26°
47%
11 AM
27°
47%
12 PM
28°
47%
1 PM
28°
47%
2 PM
31°
47%
3 PM
31°
48%
4 PM
31°
48%
7-Day Forecast
Today
33° 21°
Mostly Cloudy with a 90% chance of rain.
Sat
33° 21°
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 29° Mostly Cloudy 77% 6 mph E 69%
6 PM 28° Overcast 90% 9 mph ENE 75%
7 PM 27° Overcast 90% 8 mph ENE 83%
8 PM 24° Thunderstorm 90% 7 mph NE 90%
9 PM 24° Heavy Rain 90% 8 mph NE 92%
10 PM 23° Heavy Rain 90% 7 mph E 94%
11 PM 23° Heavy Rain 71% 6 mph E 95%
12 AM 23° Overcast 71% 4 mph E 95%
1 AM 23° Overcast 57% 2 mph NE 95%
2 AM 23° Mostly Cloudy 46% 4 mph E 95%
3 AM 23° Mostly Cloudy 33% 3 mph ESE 96%
4 AM 23° Mostly Cloudy 41% 2 mph ESE 96%
5 AM 23° Mostly Cloudy 33% 3 mph ESE 96%
6 AM 21° Mostly Cloudy 36% 2 mph E 95%
7 AM 22° Partly Cloudy 41% 2 mph N 94%
8 AM 22° Partly Cloudy 42% 2 mph NW 92%
9 AM 24° Partly Cloudy 42% 3 mph SW 86%
10 AM 26° Partly Cloudy 47% 4 mph WSW 79%
11 AM 27° Rain 47% 4 mph WSW 73%
12 PM 28° Rain 47% 4 mph SW 71%
1 PM 28° Rain 47% 5 mph SW 68%
2 PM 31° Rain 47% 5 mph SW 66%
3 PM 31° Rain 48% 5 mph SW 66%
4 PM 31° Rain 48% 5 mph SW 66%
15-Day Forecast
Today
8/21
Mostly Cloudy
90%
21°
33°
Sat
8/22
Rain
65%
21°
33°
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, 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
SBCAPE2243 J/kg
MLCAPE1912 J/kg
MUCAPE2243 J/kg
SBCIN-51 J/kg
MLCIN-65 J/kg
Lifted Index-6.0
Kinematics
0–6 km Shear21 kt
0–1 km Shear10 kt
Eff. Shear17 kt
0–1 km SRH49
0–3 km SRH99
Eff. SRH99
Storm Motion274° @ 18 kt
0–1 km EHI0.7
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index39.9
Thermo & Levels
PWAT2.45 in
0–3 km LR6.6 °C/km
700–500 LR5.7 °C/km
Total Totals49.8
LCL925 hPa
LFC819 hPa
EL149 hPa
Freezing Lvl14,734 ft