Heat Advisory — Marion, AL, Lamar, AL, Fayette, AL, Walker, AL, Jefferson, AL, Shelby, AL 9:00 PM

Jefferson County, Alabama, United States

Last updated: 1:02 AM CDT  ·  Refresh
27°C
Feels like 29°
Partly Cloudy
▲ 34°  /  ▼ 22°
Wind
5 mph SSW
Humidity
86%
Dew Point
23°
Pressure
29.37 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
56%
Sunrise
6:14 AM
Sunset
7:26 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Jefferson County is currently partly cloudy at 27°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 2129 J/kg) — isolated convective development possible. Sunrise: 6:14AM · Sunset: 7:26PM.

Alerts

Heat Advisory
Marion, AL, Lamar, AL, Fayette, AL, Walker, AL, Jefferson, AL, Shelby, AL
Expires 9:00 PM
54 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
27°
12%
2 AM
24°
8%
3 AM
24°
12%
4 AM
24°
9%
5 AM
23°
10%
6 AM
22°
11%
7 AM
22°
8%
8 AM
24°
8%
9 AM
26°
17%
10 AM
28°
32%
11 AM
28°
36%
12 PM
29°
33%
1 PM
32°
36%
2 PM
32°
36%
3 PM
32°
36%
4 PM
32°
36%
5 PM
34°
30%
6 PM
34°
25%
7 PM
33°
25%
8 PM
32°
18%
9 PM
28°
20%
10 PM
27°
15%
11 PM
25°
6%
12 AM
24°
6%
7-Day Forecast
Today
34° 22°
Partly Cloudy with a 36% chance of rain.
Sat
36° 22°
Clear.
Sun
36° 19°
Mostly Clear with a 51% chance of rain.
Mon
31° 19°
Clear with a 74% chance of rain.
Tue
34° 19°
Heavy Rain, 90% chance.
Wed
36° 23°
Rain, 82% chance.
Thu
33° 20°
Rain, 90% chance.
TimeTempConditionsPrecipWindHumidity
Now 27° Partly Cloudy 12% 5 mph SSW 86%
2 AM 24° Overcast 8% 3 mph W 89%
3 AM 24° Overcast 12% 3 mph NNW 89%
4 AM 24° Overcast 9% 3 mph NW 89%
5 AM 23° Mostly Cloudy 10% 2 mph NW 89%
6 AM 22° Partly Cloudy 11% 3 mph WNW 89%
7 AM 22° Partly Cloudy 8% 2 mph W 89%
8 AM 24° Partly Cloudy 8% 3 mph WNW 82%
9 AM 26° Mostly Clear 17% 3 mph W 74%
10 AM 28° Mostly Clear 32% 3 mph WSW 67%
11 AM 28° Mostly Clear 36% 3 mph W 64%
12 PM 29° Partly Cloudy 33% 4 mph NW 60%
1 PM 32° Partly Cloudy 36% 4 mph WNW 57%
2 PM 32° Partly Cloudy 36% 5 mph NW 57%
3 PM 32° Partly Cloudy 36% 5 mph NW 56%
4 PM 32° Partly Cloudy 36% 5 mph NW 55%
5 PM 34° Partly Cloudy 30% 5 mph NW 57%
6 PM 34° Partly Cloudy 25% 5 mph NW 60%
7 PM 33° Partly Cloudy 25% 5 mph NNW 62%
8 PM 32° Partly Cloudy 18% 5 mph NNW 64%
9 PM 28° Clear 20% 4 mph NNW 67%
10 PM 27° Clear 15% 3 mph N 69%
11 PM 25° Clear 6% 3 mph NNE 70%
12 AM 24° Mostly Clear 6% 3 mph NNE 73%
15-Day Forecast
Today
8/21
Partly Cloudy
36%
22°
34°
Sat
8/22
Clear
6%
22°
36°
Sun
8/23
Mostly Clear
51%
19°
36°
Mon
8/24
Clear
74%
19°
31°
Tue
8/25
Heavy Rain
90%
19°
34°
Wed
8/26
Rain
82%
23°
36°
Thu
8/27
Rain
90%
20°
33°
Fri
8/28
Drizzle
43%
20°
36°
Sat
8/29
Drizzle
44%
21°
37°
Sun
8/30
Drizzle
60%
21°
36°
Mon
8/31
Drizzle
60%
24°
36°
Tue
9/1
Drizzle
60%
23°
35°
Wed
9/2
Drizzle
60%
23°
35°
Thu
9/3
Drizzle
60%
23°
35°
Fri
9/4
Drizzle
60%
22°
35°
54
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
54 AQI 10.9 µg/m³
O3
Ground-level ozone
44 AQI 48 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 54 Moderate 44 54
Sat 48 Good 48 43
Sun 53 Moderate 39 53
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, 03:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE1858 J/kg
MLCAPE1951 J/kg
MUCAPE2316 J/kg
SBCIN-145 J/kg
MLCIN-77 J/kg
Lifted Index-5.8
Kinematics
0–6 km Shear11 kt
0–1 km Shear14 kt
Eff. Shear12 kt
0–1 km SRH55
0–3 km SRH34
Eff. SRH34
Storm Motion315° @ 14 kt
0–1 km EHI0.6
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index33.4
Thermo & Levels
PWAT2.07 in
0–3 km LR5.4 °C/km
700–500 LR6.6 °C/km
Total Totals52.7
LCL941 hPa
LFC743 hPa
EL169 hPa
Freezing Lvl14,642 ft