Extreme Heat Warning — Marion, AL, Lamar, AL, Fayette, AL, Winston, AL, Walker, AL, Blount, AL, Etowah, AL, Calhoun, AL, Cherokee, AL, Cleburne, AL, Pickens, AL, Tuscaloosa, AL, Jefferson, AL, Shelby, AL, St. Clair, AL, Talladega, AL, Clay, AL, Randolph, AL, Sumter, AL, Greene, AL, Hale, AL, Perry, AL, Bibb, AL, Chilton, AL, Coosa, AL, Tallapoosa, AL, Chambers, AL, Marengo, AL, Dallas, AL, Autauga, AL, Lowndes, AL, Elmore, AL, Montgomery, AL, Macon, AL, Bullock, AL, Lee, AL, Russell, AL, Pike, AL, Barbour, AL 9:00 PM

St. Clair County, Alabama, United States

Last updated: 12:57 AM CDT  ·  Refresh
27°C
Feels like 31°
Clear
▲ 37°  /  ▼ 22°
Wind
3 mph SSW
Humidity
79%
Dew Point
22°
Pressure
29.28 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
0%
Sunrise
6:08 AM
Sunset
7:29 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: St. Clair County is currently clear at 26°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 2064 J/kg) — isolated convective development possible. Sunrise: 6:08AM · Sunset: 7:29PM.

Alerts

Extreme Heat Warning
Marion, AL, Lamar, AL, Fayette, AL, Winston, AL, Walker, AL, Blount, AL, Etowah, AL, Calhoun, AL, Cherokee, AL, Cleburne, AL, Pickens, AL, Tuscaloosa, AL, Jefferson, AL, Shelby, AL, St. Clair, AL, Talladega, AL, Clay, AL, Randolph, AL, Sumter, AL, Greene, AL, Hale, AL, Perry, AL, Bibb, AL, Chilton, AL, Coosa, AL, Tallapoosa, AL, Chambers, AL, Marengo, AL, Dallas, AL, Autauga, AL, Lowndes, AL, Elmore, AL, Montgomery, AL, Macon, AL, Bullock, AL, Lee, AL, Russell, AL, Pike, AL, Barbour, AL
Expires 9:00 PM
55 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
27°
3%
1 AM
26°
3%
2 AM
26°
3%
3 AM
25°
3%
4 AM
23°
4%
5 AM
23°
4%
6 AM
23°
4%
7 AM
26°
9%
8 AM
29°
9%
9 AM
31°
7%
10 AM
32°
8%
11 AM
34°
16%
12 PM
36°
16%
1 PM
37°
22%
2 PM
37°
26%
3 PM
37°
31%
4 PM
36°
46%
5 PM
34°
46%
6 PM
32°
47%
7 PM
32°
48%
8 PM
29°
48%
9 PM
28°
39%
10 PM
28°
30%
11 PM
27°
30%
7-Day Forecast
Today
37° 22°
Rain, 47% chance.
Tue
35° 22°
Haze.
Wed
37° 19°
Clear with a 36% chance of rain.
Thu
34° 22°
Mostly Clear with a 33% chance of rain.
Fri
33° 21°
Rain, 64% chance.
Sat
34° 20°
Rain, 64% chance.
Sun
35° 20°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 27° Clear 3% 3 mph SSW 79%
1 AM 26° Clear 3% 4 mph SSW 79%
2 AM 26° Mostly Clear 3% 4 mph SW 81%
3 AM 25° Mostly Clear 3% 4 mph SW 82%
4 AM 23° Mostly Clear 4% 4 mph SW 82%
5 AM 23° Mostly Clear 4% 4 mph SW 83%
6 AM 23° Mostly Clear 4% 4 mph WSW 84%
7 AM 26° Mostly Clear 9% 5 mph WSW 76%
8 AM 29° Mostly Clear 9% 6 mph W 67%
9 AM 31° Mostly Clear 7% 7 mph W 59%
10 AM 32° Mostly Clear 8% 7 mph W 54%
11 AM 34° Mostly Clear 16% 7 mph W 48%
12 PM 36° Mostly Clear 16% 7 mph W 43%
1 PM 37° Mostly Clear 22% 7 mph W 42%
2 PM 37° Mostly Clear 26% 7 mph W 40%
3 PM 37° Mostly Clear 31% 6 mph W 39%
4 PM 36° Partly Cloudy 46% 6 mph W 46%
5 PM 34° Partly Cloudy 46% 6 mph WNW 53%
6 PM 32° Rain 47% 8 mph NW 60%
7 PM 32° Rain 48% 6 mph WNW 64%
8 PM 29° Partly Cloudy 48% 5 mph WSW 69%
9 PM 28° Partly Cloudy 39% 6 mph SW 74%
10 PM 28° Partly Cloudy 30% 6 mph WSW 76%
11 PM 27° Partly Cloudy 30% 6 mph WSW 77%
15-Day Forecast
Today
8/17
Rain
47%
22°
37°
Tue
8/18
Haze
17%
22°
35°
Wed
8/19
Clear
36%
19°
37°
Thu
8/20
Mostly Clear
33%
22°
34°
Fri
8/21
Rain
64%
21°
33°
Sat
8/22
Rain
64%
20°
34°
Sun
8/23
Clear
17%
20°
35°
Mon
8/24
Rain
44%
19°
33°
Tue
8/25
Rain
68%
20°
33°
Wed
8/26
Rain
64%
20°
33°
Thu
8/27
Drizzle
60%
22°
34°
Fri
8/28
Drizzle
60%
21°
33°
Sat
8/29
Drizzle
60%
20°
33°
Sun
8/30
Drizzle
60%
20°
32°
Mon
8/31
Drizzle
60%
20°
32°
55
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
55 AQI 11.5 µg/m³
O3
Ground-level ozone
26 AQI 29 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 55 Moderate 26 55
Tue 56 Moderate 33 56
Wed 56 Moderate 35 56
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 Aug 17, 04:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE778 J/kg
MLCAPE783 J/kg
MUCAPE882 J/kg
SBCIN-224 J/kg
MLCIN-113 J/kg
Lifted Index-3.2
Kinematics
0–6 km Shear4 kt
0–1 km Shear16 kt
Eff. Shear5 kt
0–1 km SRH84
0–3 km SRH65
Eff. SRH65
Storm Motion26° @ 11 kt
0–1 km EHI0.4
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index12.6
Thermo & Levels
PWAT1.63 in
0–3 km LR4.9 °C/km
700–500 LR6.3 °C/km
Total Totals48.1
LCL934 hPa
LFC665 hPa
EL192 hPa
Freezing Lvl15,620 ft