Jefferson County, East Tennessee, Tennessee, United States

Last updated: 8:32 PM CDT  ·  Refresh
18°C
Feels like 16°
Partly Cloudy
▲ 21°  /  ▼ 14°
Wind
12 mph ENE
Humidity
84%
Dew Point
16°
Pressure
28.69 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
36%
Sunrise
7:36 AM
Sunset
7:04 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Jefferson County is currently partly cloudy at 18°C. Precipitation is likely — peak probability 80% around 12 AM. Sunrise: 7:36AM · Sunset: 7:04PM.

Alerts

No active alerts for this location.
42 AQI · Good Dominant: O3 Air Quality
Hourly Forecast · Next 24 Hours
Now
18°
50%
10 PM
18°
68%
11 PM
18°
63%
12 AM
18°
79%
1 AM
18°
79%
2 AM
19°
65%
3 AM
18°
51%
4 AM
18°
51%
5 AM
18°
54%
6 AM
16°
57%
7 AM
16°
67%
8 AM
16°
43%
9 AM
16°
43%
10 AM
16°
54%
11 AM
16°
41%
12 PM
15°
49%
1 PM
15°
50%
2 PM
18°
47%
3 PM
18°
59%
4 PM
19°
59%
5 PM
19°
63%
6 PM
18°
54%
7 PM
18°
51%
8 PM
18°
41%
7-Day Forecast
Tonight
21° 14°
Partly Cloudy with a 50% chance of rain.
Sun
20° 15°
Overcast with a 79% chance of rain.
Mon
27° 13°
Partly Cloudy.
Tue
32° 13°
Mostly Clear.
Wed
33° 18°
Overcast.
Thu
32° 17°
Clear.
Fri
31° 11°
Clear with a 28% chance of rain.
TimeTempConditionsPrecipWindHumidity
Now 18° Partly Cloudy 50% 12 mph ENE 84%
10 PM 18° Mostly Cloudy 68% 13 mph ENE 86%
11 PM 18° Partly Cloudy 63% 13 mph ENE 88%
12 AM 18° Mostly Cloudy 79% 12 mph ENE 90%
1 AM 18° Rain 79% 10 mph ENE 91%
2 AM 19° Rain 65% 8 mph ENE 92%
3 AM 18° Mostly Cloudy 51% 6 mph ENE 94%
4 AM 18° Mostly Cloudy 51% 5 mph ENE 94%
5 AM 18° Partly Cloudy 54% 4 mph ENE 95%
6 AM 16° Mostly Cloudy 57% 2 mph WSW 95%
7 AM 16° Overcast 67% 7 mph WSW 96%
8 AM 16° Overcast 43% 9 mph WSW 95%
9 AM 16° Mostly Cloudy 43% 9 mph WSW 91%
10 AM 16° Mostly Cloudy 54% 10 mph WSW 88%
11 AM 16° Mostly Cloudy 41% 11 mph WSW 86%
12 PM 15° Overcast 49% 11 mph WSW 88%
1 PM 15° Overcast 50% 11 mph WSW 91%
2 PM 18° Overcast 47% 11 mph WSW 91%
3 PM 18° Overcast 59% 11 mph WSW 91%
4 PM 19° Rain 59% 12 mph WSW 91%
5 PM 19° Rain 63% 12 mph WSW 91%
6 PM 18° Drizzle 54% 12 mph WSW 93%
7 PM 18° Overcast 51% 12 mph WSW 94%
8 PM 18° Overcast 41% 12 mph WSW 94%
15-Day Forecast
Today
10/10
Partly Cloudy
50%
14°
21°
Sun
10/11
Overcast
79%
15°
20°
Mon
10/12
Partly Cloudy
6%
13°
27°
Tue
10/13
Mostly Clear
3%
13°
32°
Wed
10/14
Overcast
16%
18°
33°
Thu
10/15
Clear
16%
17°
32°
Fri
10/16
Clear
28%
11°
31°
Sat
10/17
Clear
28%
1°
19°
Sun
10/18
Drizzle
43%
-2°
15°
Mon
10/19
Clear
19%
-2°
19°
Tue
10/20
Clear
25%
2°
22°
Wed
10/21
Drizzle
60%
5°
24°
Thu
10/22
Clear
25%
7°
24°
Fri
10/23
Drizzle
60%
6°
23°
Sat
10/24
Drizzle
60%
6°
23°
42
Good
U.S. Air Quality Index · Dominant: O3
50 100 150 200

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

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
13 AQI 2.3 µg/m³
O3
Ground-level ozone
Dominant
42 AQI 45 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 42 Good 42 13
Mon 31 Good 31 9
Tue 45 Good 45 39
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 LCL0°C Temperature (°C) Pressure (hPa)
Temp Dewpoint Parcel (SB) CAPE CIN Dry adiabat Moist adiabat Mixing ratio
RAP
Valid Sat Oct 10, 23:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 50 60 70 80 90 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE0 J/kg
MLCAPE27 J/kg
MUCAPE131 J/kg
SBCIN—
MLCIN0 J/kg
Lifted Index4.2
Kinematics
0–6 km Shear62 kt
0–1 km Shear33 kt
Eff. Shear26 kt
0–1 km SRH373
0–3 km SRH404
Eff. SRH38
Storm Motion193° @ 38 kt
0–1 km EHI0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.1
K-Index36.3
Thermo & Levels
PWAT1.54 in
0–3 km LR4.0 °C/km
700–500 LR5.9 °C/km
Total Totals47.5
LCL936 hPa
LFC—
EL—
Freezing Lvl13,363 ft