Coastal Flood Advisory — Coastal Colleton, SC, Charleston, SC 7:00 PM

Charleston, South Carolina

Last updated: 8:29 AM CDT  ·  Refresh
25°C
Feels like 26°
Mostly Cloudy
▲ 31°  /  ▼ 23°
Wind
11 mph NE
Humidity
81%
Dew Point
22°
Pressure
29.97 inHg
Visibility
10 mi
UV Index
4.8
Cloud Cover
67%
Sunrise
6:58 AM
Sunset
7:36 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Charleston is currently mostly cloudy at 25°C. Precipitation is likely — peak probability 88% around 2 PM. Atmospheric instability is elevated (CAPE up to 1251 J/kg) — isolated convective development possible. Sunrise: 6:58AM · Sunset: 7:36PM.

Alerts

Coastal Flood Advisory
Coastal Colleton, SC, Charleston, SC
Expires 7:00 PM
42 AQI · Good Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
25°
54%
10 AM
27°
65%
11 AM
28°
84%
12 PM
29°
69%
1 PM
29°
81%
2 PM
29°
87%
3 PM
30°
72%
4 PM
30°
59%
5 PM
28°
51%
6 PM
28°
43%
7 PM
27°
29%
8 PM
26°
37%
9 PM
26°
30%
10 PM
26°
40%
11 PM
25°
49%
12 AM
25°
67%
1 AM
24°
61%
2 AM
24°
56%
3 AM
24°
56%
4 AM
24°
50%
5 AM
23°
50%
6 AM
23°
51%
7 AM
23°
47%
8 AM
24°
45%
7-Day Forecast
Today
31° 23°
Partly Cloudy with a 72% chance of rain.
Tue
32° 23°
Partly Cloudy with a 67% chance of rain.
Wed
31° 25°
Partly Cloudy with a 41% chance of rain.
Thu
32° 26°
Mostly Clear with a 60% chance of rain.
Fri
34° 25°
Rain, 69% chance.
Sat
33° 26°
Rain, 70% chance.
Sun
33° 24°
Drizzle, 63% chance.
TimeTempConditionsPrecipWindHumidity
Now 25° Mostly Cloudy 54% 11 mph NE 81%
10 AM 27° Mostly Cloudy 65% 13 mph NE 76%
11 AM 28° Mostly Cloudy 84% 14 mph NE 74%
12 PM 29° Partly Cloudy 69% 15 mph ENE 73%
1 PM 29° Mostly Cloudy 81% 14 mph ENE 73%
2 PM 29° Mostly Cloudy 87% 14 mph ENE 72%
3 PM 30° Partly Cloudy 72% 16 mph ENE 71%
4 PM 30° Partly Cloudy 59% 16 mph ENE 69%
5 PM 28° Mostly Clear 51% 15 mph ENE 69%
6 PM 28° Mostly Clear 43% 14 mph NE 71%
7 PM 27° Mostly Clear 29% 13 mph NE 73%
8 PM 26° Mostly Clear 37% 12 mph NE 74%
9 PM 26° Mostly Clear 30% 12 mph NE 76%
10 PM 26° Mostly Clear 40% 12 mph NE 77%
11 PM 25° Partly Cloudy 49% 12 mph NE 78%
12 AM 25° Partly Cloudy 67% 12 mph NE 80%
1 AM 24° Mostly Cloudy 61% 12 mph NE 82%
2 AM 24° Mostly Cloudy 56% 12 mph NE 83%
3 AM 24° Mostly Cloudy 56% 12 mph NE 84%
4 AM 24° Mostly Cloudy 50% 12 mph NE 84%
5 AM 23° Partly Cloudy 50% 12 mph NE 83%
6 AM 23° Partly Cloudy 51% 12 mph NE 82%
7 AM 23° Partly Cloudy 47% 12 mph NE 81%
8 AM 24° Partly Cloudy 45% 12 mph NE 80%
15-Day Forecast
Today
9/7
Partly Cloudy
72%
23°
31°
Tue
9/8
Partly Cloudy
67%
23°
32°
Wed
9/9
Partly Cloudy
41%
25°
31°
Thu
9/10
Mostly Clear
60%
26°
32°
Fri
9/11
Rain
69%
25°
34°
Sat
9/12
Rain
70%
26°
33°
Sun
9/13
Drizzle
63%
24°
33°
Mon
9/14
Rain
69%
25°
33°
Tue
9/15
Rain
68%
24°
33°
Wed
9/16
Rain
68%
24°
33°
Thu
9/17
Drizzle
64%
22°
31°
Fri
9/18
Drizzle
60%
23°
30°
Sat
9/19
Drizzle
60%
23°
29°
Sun
9/20
Drizzle
60%
22°
29°
Mon
9/21
Drizzle
60%
22°
29°
42
Good
U.S. Air Quality Index · Dominant: PM2.5
50 100 150 200

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

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
Dominant
42 AQI 7.5 µg/m³
O3
Ground-level ozone
32 AQI 36 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Tue 42 Good 32 42
Wed 29 Good 29 29
Thu 30 Good 29 30
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 Mon Sep 7, 11:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE797 J/kg
MLCAPE454 J/kg
MUCAPE797 J/kg
SBCIN-5 J/kg
MLCIN-16 J/kg
Lifted Index-3.0
Kinematics
0–6 km Shear17 kt
0–1 km Shear8 kt
Eff. Shear17 kt
0–1 km SRH-10
0–3 km SRH68
Eff. SRH68
Storm Motion5° @ 22 kt
0–1 km EHI-0.1
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index30.9
Thermo & Levels
PWAT1.89 in
0–3 km LR5.8 °C/km
700–500 LR5.2 °C/km
Total Totals43.8
LCL974 hPa
LFC894 hPa
EL198 hPa
Freezing Lvl15,197 ft