Severe Thunderstorm Warning — Knox County, IN, Sullivan County, IN 8:45 PM Severe Thunderstorm Watch 10:00 PM Severe Thunderstorm Watch 10:00 PM Areal Flood Advisory — Knox County, IN, Sullivan County, IN 12:00 AM

Knox County, Indiana, United States

Last updated: 8:25 PM CDT  ·  Refresh
28°C
Feels like 35°
Thunderstorm
▲ 33°  /  ▼ 22°
Wind
5 mph SSE
Humidity
88%
Dew Point
26°
Pressure
29.27 inHg
Visibility
9 mi
UV Index
0.0
Cloud Cover
77%
Sunrise
6:46 AM
Sunset
9:04 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Knox County is currently thunderstorm at 28°C. Precipitation is likely — peak probability 54% around 9 PM. Atmospheric instability is elevated (CAPE up to 3834 J/kg) — isolated convective development possible. Sunrise: 6:46AM · Sunset: 9:04PM.

Alerts

Severe Thunderstorm Warning
Knox County, IN, Sullivan County, IN
Expires 8:45 PM
Severe Thunderstorm Watch
Expires 10:00 PM
Severe Thunderstorm Watch
Expires 10:00 PM
Areal Flood Advisory
Knox County, IN, Sullivan County, IN
Expires 12:00 AM
44 AQI · Good Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
29°
53%
10 PM
27°
50%
11 PM
26°
41%
12 AM
26°
40%
1 AM
26°
23%
2 AM
27°
9%
3 AM
27°
9%
4 AM
27°
9%
5 AM
27°
7%
6 AM
25°
7%
7 AM
25°
3%
8 AM
25°
3%
9 AM
26°
3%
10 AM
27°
3%
11 AM
28°
3%
12 PM
28°
3%
1 PM
29°
3%
2 PM
29°
3%
3 PM
29°
3%
4 PM
32°
3%
5 PM
32°
3%
6 PM
31°
3%
7 PM
30°
3%
8 PM
29°
3%
7-Day Forecast
Tonight
33° 22°
Heavy Rain, 53% chance.
Tue
32° 19°
Partly Cloudy with a 40% chance of rain.
Wed
28° 16°
Clear.
Thu
28° 16°
Clear.
Fri
25° 19°
Rain, 64% chance.
Sat
24° 18°
Rain, 90% chance.
Sun
26° 17°
Drizzle, 52% chance.
TimeTempConditionsPrecipWindHumidity
Now 29° Heavy Rain 53% 4 mph S 88%
10 PM 27° Thunderstorm 50% 10 mph ENE 89%
11 PM 26° Mostly Cloudy 41% 12 mph S 89%
12 AM 26° Partly Cloudy 40% 9 mph SSW 89%
1 AM 26° Partly Cloudy 23% 8 mph SSW 89%
2 AM 27° Partly Cloudy 9% 9 mph SW 89%
3 AM 27° Mostly Clear 9% 8 mph SW 89%
4 AM 27° Partly Cloudy 9% 9 mph WSW 89%
5 AM 27° Partly Cloudy 7% 10 mph WSW 88%
6 AM 25° Partly Cloudy 7% 9 mph W 88%
7 AM 25° Partly Cloudy 3% 9 mph W 88%
8 AM 25° Partly Cloudy 3% 9 mph WNW 88%
9 AM 26° Partly Cloudy 3% 10 mph NW 85%
10 AM 27° Mostly Cloudy 3% 11 mph NNW 82%
11 AM 28° Mostly Cloudy 3% 12 mph NNW 80%
12 PM 28° Partly Cloudy 3% 12 mph NNW 77%
1 PM 29° Partly Cloudy 3% 12 mph NNW 74%
2 PM 29° Partly Cloudy 3% 12 mph NNW 71%
3 PM 29° Partly Cloudy 3% 12 mph NNW 70%
4 PM 32° Mostly Cloudy 3% 12 mph NNW 70%
5 PM 32° Mostly Cloudy 3% 12 mph NNW 71%
6 PM 31° Partly Cloudy 3% 11 mph NNW 74%
7 PM 30° Partly Cloudy 3% 10 mph NNW 77%
8 PM 29° Partly Cloudy 3% 10 mph NNW 80%
15-Day Forecast
Today
7/27
Heavy Rain
53%
22°
33°
Tue
7/28
Partly Cloudy
40%
19°
32°
Wed
7/29
Clear
3%
16°
28°
Thu
7/30
Clear
7%
16°
28°
Fri
7/31
Rain
64%
19°
25°
Sat
8/1
Rain
90%
18°
24°
Sun
8/2
Drizzle
52%
17°
26°
Mon
8/3
Clear
31%
18°
28°
Tue
8/4
Rain
68%
19°
29°
Wed
8/5
Rain
68%
21°
29°
Thu
8/6
Drizzle
60%
21°
32°
Fri
8/7
Drizzle
60%
19°
32°
Sat
8/8
Drizzle
60%
19°
28°
Sun
8/9
Drizzle
60%
20°
29°
Mon
8/10
Drizzle
60%
20°
29°
44
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
44 AQI 8.0 µg/m³
O3
Ground-level ozone
33 AQI 37 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 44 Good 33 44
Wed 49 Good 39 49
Thu 43 Good 43 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 Mon Jul 27, 23:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 50 60 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE4266 J/kg
MLCAPE3745 J/kg
MUCAPE4266 J/kg
SBCIN-47 J/kg
MLCIN0 J/kg
Lifted Index-9.5
Kinematics
0–6 km Shear42 kt
0–1 km Shear14 kt
Eff. Shear49 kt
0–1 km SRH86
0–3 km SRH60
Eff. SRH60
Storm Motion274° @ 33 kt
0–1 km EHI2.3
Composite Parameters
Sig. Tornado3.1
STP (eff)2.5
Supercell6.5
K-Index26.6
Thermo & Levels
PWAT2.06 in
0–3 km LR5.2 °C/km
700–500 LR7.0 °C/km
Total Totals52.4
LCL960 hPa
LFC870 hPa
EL137 hPa
Freezing Lvl14,967 ft