Heat Advisory — Stewart, TN, Montgomery, TN, Robertson, TN, Sumner, TN, Houston, TN, Humphreys, TN, Dickson, TN, Cheatham, TN, Davidson, TN, Wilson, TN, Trousdale, TN, Smith, TN, Perry, TN, Hickman, TN, Lewis, TN, Williamson, TN, Maury, TN, Rutherford, TN 9:00 PM

Sumner County, Middle Tennessee, Tennessee, United States

Last updated: 5:18 AM CDT  ·  Refresh
24°C
Feels like 27°
Mostly Clear
▲ 34°  /  ▼ 23°
Wind
4 mph SSW
Humidity
91%
Dew Point
22°
Pressure
29.35 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
11%
Sunrise
6:00 AM
Sunset
7:41 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Sumner County is currently mostly clear at 24°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 3106 J/kg) — isolated convective development possible. Sunrise: 6:00AM · Sunset: 7:41PM.

Alerts

Heat Advisory
Stewart, TN, Montgomery, TN, Robertson, TN, Sumner, TN, Houston, TN, Humphreys, TN, Dickson, TN, Cheatham, TN, Davidson, TN, Wilson, TN, Trousdale, TN, Smith, TN, Perry, TN, Hickman, TN, Lewis, TN, Williamson, TN, Maury, TN, Rutherford, TN
Expires 9:00 PM
43 AQI · Good Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
24°
11%
6 AM
22°
27%
7 AM
23°
25%
8 AM
25°
25%
9 AM
28°
25%
10 AM
29°
25%
11 AM
31°
25%
12 PM
32°
20%
1 PM
33°
13%
2 PM
33°
20%
3 PM
33°
23%
4 PM
33°
26%
5 PM
33°
27%
6 PM
32°
27%
7 PM
31°
28%
8 PM
29°
28%
9 PM
27°
29%
10 PM
27°
29%
11 PM
26°
27%
12 AM
26°
24%
1 AM
26°
5%
2 AM
26°
14%
3 AM
26°
24%
4 AM
26°
24%
7-Day Forecast
Today
34° 23°
Mostly Clear with a 28% chance of rain.
Wed
34° 23°
Partly Cloudy with a 58% chance of rain.
Thu
35° 22°
Mostly Cloudy with a 25% chance of rain.
Fri
33° 23°
Clear with a 28% chance of rain.
Sat
34° 23°
Clear.
Sun
36° 24°
Drizzle, 34% chance.
Mon
33° 22°
Thunderstorm, 49% chance.
TimeTempConditionsPrecipWindHumidity
Now 24° Mostly Clear 11% 4 mph SSW 91%
6 AM 22° Mostly Clear 27% 4 mph SSW 89%
7 AM 23° Mostly Clear 25% 5 mph SSW 86%
8 AM 25° Mostly Clear 25% 7 mph SW 79%
9 AM 28° Mostly Clear 25% 8 mph SW 72%
10 AM 29° Mostly Clear 25% 8 mph WSW 67%
11 AM 31° Mostly Clear 25% 9 mph WSW 62%
12 PM 32° Mostly Clear 20% 9 mph WSW 58%
1 PM 33° Mostly Clear 13% 9 mph WSW 54%
2 PM 33° Partly Cloudy 20% 9 mph WSW 54%
3 PM 33° Partly Cloudy 23% 9 mph SW 53%
4 PM 33° Partly Cloudy 26% 9 mph SW 54%
5 PM 33° Partly Cloudy 27% 8 mph SW 58%
6 PM 32° Partly Cloudy 27% 7 mph SW 62%
7 PM 31° Partly Cloudy 28% 6 mph SW 67%
8 PM 29° Partly Cloudy 28% 6 mph SW 70%
9 PM 27° Partly Cloudy 29% 6 mph SW 73%
10 PM 27° Partly Cloudy 29% 6 mph SSW 76%
11 PM 26° Partly Cloudy 27% 5 mph SSW 79%
12 AM 26° Partly Cloudy 24% 5 mph SSW 82%
1 AM 26° Mostly Clear 5% 5 mph SSW 84%
2 AM 26° Partly Cloudy 14% 6 mph SSW 83%
3 AM 26° Partly Cloudy 24% 6 mph SSW 82%
4 AM 26° Partly Cloudy 24% 6 mph SSW 82%
15-Day Forecast
Today
8/11
Mostly Clear
28%
23°
34°
Wed
8/12
Partly Cloudy
58%
23°
34°
Thu
8/13
Mostly Cloudy
25%
22°
35°
Fri
8/14
Clear
28%
23°
33°
Sat
8/15
Clear
7%
23°
34°
Sun
8/16
Drizzle
34%
24°
36°
Mon
8/17
Thunderstorm
49%
22°
33°
Tue
8/18
Drizzle
53%
20°
33°
Wed
8/19
Clear
35%
20°
34°
Thu
8/20
Clear
32%
22°
32°
Fri
8/21
Clear
25%
21°
32°
Sat
8/22
Drizzle
60%
21°
33°
Sun
8/23
Drizzle
60%
21°
32°
Mon
8/24
Drizzle
60%
21°
32°
Tue
8/25
Drizzle
60%
20°
31°
43
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
43 AQI 7.7 µg/m³
O3
Ground-level ozone
38 AQI 42 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 43 Good 38 43
Wed 38 Good 38 29
Thu 37 Good 37 31
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 Tue Aug 11, 09:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE1392 J/kg
MLCAPE1386 J/kg
MUCAPE1607 J/kg
SBCIN-203 J/kg
MLCIN0 J/kg
Lifted Index-5.6
Kinematics
0–6 km Shear15 kt
0–1 km Shear16 kt
Eff. Shear16 kt
0–1 km SRH91
0–3 km SRH36
Eff. SRH36
Storm Motion338° @ 13 kt
0–1 km EHI0.8
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index27.7
Thermo & Levels
PWAT1.65 in
0–3 km LR4.2 °C/km
700–500 LR7.4 °C/km
Total Totals50.0
LCL977 hPa
LFC671 hPa
EL191 hPa
Freezing Lvl14,797 ft