Heat Advisory — Jefferson, IL, Wayne, IL, Edwards, IL, Wabash, IL, Franklin, IL, Hamilton, IL, White, IL, Jackson, IL, Williamson, IL, Saline, IL, Gallatin, IL, Union, IL, Johnson, IL, Pope, IL, Hardin, IL, Alexander, IL, Pulaski, IL, Massac, IL, Gibson, IN, Pike, IN, Posey, IN, Vanderburgh, IN, Warrick, IN, Spencer, IN, Fulton, KY, Hickman, KY, Carlisle, KY, Ballard, KY, McCracken, KY, Graves, KY, Livingston, KY, Marshall, KY, Calloway, KY, Crittenden, KY, Lyon, KY, Trigg, KY, Caldwell, KY, Union, KY, Webster, KY, Hopkins, KY, Christian, KY, Henderson, KY, Daviess, KY, McLean, KY, Muhlenberg, KY, Todd, KY, Perry, MO, Bollinger, MO, Cape Girardeau, MO, Wayne, MO, Carter, MO, Ripley, MO, Butler, MO, Stoddard, MO, Scott, MO, Mississippi, MO, New Madrid, MO 8:00 PM

Lyon County, Kentucky, United States

Last updated: 8:06 AM CDT  ·  Refresh
25°C
Feels like 27°
Mostly Clear
▲ 33°  /  ▼ 23°
Wind
7 mph SSW
Humidity
81%
Dew Point
22°
Pressure
29.62 inHg
Visibility
10 mi
UV Index
5.3
Cloud Cover
15%
Sunrise
6:05 AM
Sunset
7:49 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Lyon County is currently mostly clear at 25°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 3300 J/kg) — isolated convective development possible. Sunrise: 6:05AM · Sunset: 7:49PM.

Alerts

Heat Advisory
Jefferson, IL, Wayne, IL, Edwards, IL, Wabash, IL, Franklin, IL, Hamilton, IL, White, IL, Jackson, IL, Williamson, IL, Saline, IL, Gallatin, IL, Union, IL, Johnson, IL, Pope, IL, Hardin, IL, Alexander, IL, Pulaski, IL, Massac, IL, Gibson, IN, Pike, IN, Posey, IN, Vanderburgh, IN, Warrick, IN, Spencer, IN, Fulton, KY, Hickman, KY, Carlisle, KY, Ballard, KY, McCracken, KY, Graves, KY, Livingston, KY, Marshall, KY, Calloway, KY, Crittenden, KY, Lyon, KY, Trigg, KY, Caldwell, KY, Union, KY, Webster, KY, Hopkins, KY, Christian, KY, Henderson, KY, Daviess, KY, McLean, KY, Muhlenberg, KY, Todd, KY, Perry, MO, Bollinger, MO, Cape Girardeau, MO, Wayne, MO, Carter, MO, Ripley, MO, Butler, MO, Stoddard, MO, Scott, MO, Mississippi, MO, New Madrid, MO
Expires 8:00 PM
35 AQI · Good Dominant: O3 Air Quality
Hourly Forecast · Next 24 Hours
Now
25°
15%
9 AM
26°
18%
10 AM
28°
18%
11 AM
29°
18%
12 PM
30°
18%
1 PM
32°
3%
2 PM
32°
3%
3 PM
32°
3%
4 PM
33°
3%
5 PM
32°
3%
6 PM
31°
3%
7 PM
31°
3%
8 PM
29°
3%
9 PM
28°
3%
10 PM
27°
3%
11 PM
26°
3%
12 AM
26°
3%
1 AM
26°
3%
2 AM
25°
3%
3 AM
25°
3%
4 AM
24°
3%
5 AM
24°
3%
6 AM
24°
3%
7 AM
24°
3%
7-Day Forecast
Today
33° 23°
Mostly Clear.
Tue
34° 24°
Mostly Clear.
Wed
36° 25°
Mostly Clear with a 35% chance of rain.
Thu
34° 24°
Clear with a 61% chance of rain.
Fri
33° 23°
Partly Cloudy with a 59% chance of rain.
Sat
36° 23°
Clear.
Sun
37° 24°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 25° Mostly Clear 15% 7 mph SSW 81%
9 AM 26° Clear 18% 8 mph SW 74%
10 AM 28° Clear 18% 9 mph SW 69%
11 AM 29° Clear 18% 9 mph SW 65%
12 PM 30° Clear 18% 10 mph SW 61%
1 PM 32° Clear 3% 10 mph SW 58%
2 PM 32° Partly Cloudy 3% 10 mph SW 56%
3 PM 32° Partly Cloudy 3% 10 mph SW 55%
4 PM 33° Mostly Clear 3% 10 mph SW 54%
5 PM 32° Mostly Clear 3% 9 mph SW 58%
6 PM 31° Clear 3% 8 mph SW 62%
7 PM 31° Mostly Clear 3% 6 mph SW 68%
8 PM 29° Mostly Clear 3% 6 mph SSW 71%
9 PM 28° Mostly Clear 3% 6 mph SSW 73%
10 PM 27° Clear 3% 6 mph SSW 75%
11 PM 26° Clear 3% 7 mph SSW 76%
12 AM 26° Clear 3% 7 mph SSW 76%
1 AM 26° Clear 3% 8 mph SSW 78%
2 AM 25° Mostly Clear 3% 8 mph SSW 79%
3 AM 25° Mostly Clear 3% 8 mph SSW 81%
4 AM 24° Mostly Clear 3% 8 mph SSW 83%
5 AM 24° Mostly Clear 3% 8 mph SSW 84%
6 AM 24° Mostly Clear 3% 8 mph SSW 85%
7 AM 24° Mostly Clear 3% 8 mph SSW 85%
15-Day Forecast
Today
8/10
Mostly Clear
18%
23°
33°
Tue
8/11
Mostly Clear
8%
24°
34°
Wed
8/12
Mostly Clear
35%
25°
36°
Thu
8/13
Clear
61%
24°
34°
Fri
8/14
Partly Cloudy
59%
23°
33°
Sat
8/15
Clear
10%
23°
36°
Sun
8/16
Clear
15%
24°
37°
Mon
8/17
Thunderstorm
47%
22°
33°
Tue
8/18
Mostly Clear
47%
20°
34°
Wed
8/19
Clear
44%
22°
33°
Thu
8/20
Drizzle
60%
23°
34°
Fri
8/21
Drizzle
60%
21°
33°
Sat
8/22
Drizzle
60%
21°
33°
Sun
8/23
Drizzle
60%
21°
33°
Mon
8/24
Clear
60%
21°
33°
35
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
34 AQI 6.2 µg/m³
O3
Ground-level ozone
Dominant
35 AQI 39 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Tue 35 Good 35 34
Wed 39 Good 39 19
Thu 39 Good 39 27
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 10, 11:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE1155 J/kg
MLCAPE1219 J/kg
MUCAPE1497 J/kg
SBCIN0 J/kg
MLCIN0 J/kg
Lifted Index-5.4
Kinematics
0–6 km Shear8 kt
0–1 km Shear16 kt
Eff. Shear7 kt
0–1 km SRH76
0–3 km SRH65
Eff. SRH65
Storm Motion44° @ 8 kt
0–1 km EHI0.6
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index28.0
Thermo & Levels
PWAT1.68 in
0–3 km LR4.2 °C/km
700–500 LR7.8 °C/km
Total Totals52.5
LCL960 hPa
LFC1003 hPa
EL209 hPa
Freezing Lvl14,800 ft