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

McLean County, Kentucky, United States

Last updated: 8:08 AM CDT  ·  Refresh
24°C
Feels like 27°
Mostly Clear
▲ 33°  /  ▼ 23°
Wind
8 mph SSW
Humidity
85%
Dew Point
22°
Pressure
29.65 inHg
Visibility
9 mi
UV Index
5.5
Cloud Cover
12%
Sunrise
6:00 AM
Sunset
7:47 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: McLean County is currently mostly clear at 24°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 3619 J/kg) — isolated convective development possible. Sunrise: 6:00AM · Sunset: 7:47PM.

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
48 AQI · Good Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
24°
12%
9 AM
26°
23%
10 AM
28°
23%
11 AM
29°
23%
12 PM
31°
18%
1 PM
33°
3%
2 PM
33°
3%
3 PM
33°
3%
4 PM
33°
3%
5 PM
33°
4%
6 PM
32°
4%
7 PM
31°
4%
8 PM
30°
4%
9 PM
28°
3%
10 PM
27°
5%
11 PM
26°
5%
12 AM
26°
5%
1 AM
25°
5%
2 AM
25°
5%
3 AM
25°
9%
4 AM
24°
17%
5 AM
24°
18%
6 AM
24°
18%
7 AM
23°
20%
7-Day Forecast
Today
33° 23°
Clear with a 23% chance of rain.
Tue
36° 23°
Clear with a 20% chance of rain.
Wed
37° 24°
Mostly Clear with a 60% chance of rain.
Thu
34° 24°
Clear with a 73% chance of rain.
Fri
32° 22°
Drizzle, 58% chance.
Sat
34° 22°
Rain, 55% chance.
Sun
36° 24°
Clear with a 50% chance of rain.
TimeTempConditionsPrecipWindHumidity
Now 24° Mostly Clear 12% 8 mph SSW 85%
9 AM 26° Clear 23% 9 mph SW 79%
10 AM 28° Clear 23% 10 mph SW 74%
11 AM 29° Clear 23% 11 mph SW 70%
12 PM 31° Clear 18% 11 mph SW 65%
1 PM 33° Clear 3% 12 mph SW 62%
2 PM 33° Clear 3% 12 mph SW 60%
3 PM 33° Clear 3% 11 mph SW 60%
4 PM 33° Mostly Clear 3% 11 mph SW 60%
5 PM 33° Clear 4% 10 mph SW 64%
6 PM 32° Partly Cloudy 4% 8 mph SW 68%
7 PM 31° Partly Cloudy 4% 7 mph SW 73%
8 PM 30° Mostly Clear 4% 6 mph SW 76%
9 PM 28° Mostly Clear 3% 6 mph SSW 79%
10 PM 27° Clear 5% 6 mph SSW 81%
11 PM 26° Clear 5% 7 mph SSW 82%
12 AM 26° Clear 5% 7 mph SSW 83%
1 AM 25° Mostly Clear 5% 8 mph SSW 83%
2 AM 25° Mostly Clear 5% 8 mph SSW 84%
3 AM 25° Partly Cloudy 9% 8 mph SSW 83%
4 AM 24° Partly Cloudy 17% 8 mph SW 83%
5 AM 24° Mostly Clear 18% 9 mph SW 84%
6 AM 24° Mostly Clear 18% 9 mph SW 85%
7 AM 23° Clear 20% 10 mph SW 86%
15-Day Forecast
Today
8/10
Clear
23%
23°
33°
Tue
8/11
Clear
20%
23°
36°
Wed
8/12
Mostly Clear
60%
24°
37°
Thu
8/13
Clear
73%
24°
34°
Fri
8/14
Drizzle
58%
22°
32°
Sat
8/15
Rain
55%
22°
34°
Sun
8/16
Clear
50%
24°
36°
Mon
8/17
Rain
67%
21°
32°
Tue
8/18
Mostly Clear
40%
19°
32°
Wed
8/19
Thunderstorm
45%
21°
32°
Thu
8/20
Clear
60%
22°
34°
Fri
8/21
Drizzle
60%
21°
32°
Sat
8/22
Clear
60%
20°
32°
Sun
8/23
Drizzle
60%
21°
33°
Mon
8/24
Clear
60%
20°
32°
48
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
48 AQI 8.7 µg/m³
O3
Ground-level ozone
32 AQI 35 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Tue 48 Good 32 48
Wed 38 Good 38 32
Thu 36 Good 36 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 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
SBCAPE1238 J/kg
MLCAPE1187 J/kg
MUCAPE1467 J/kg
SBCIN0 J/kg
MLCIN0 J/kg
Lifted Index-5.8
Kinematics
0–6 km Shear13 kt
0–1 km Shear17 kt
Eff. Shear12 kt
0–1 km SRH95
0–3 km SRH119
Eff. SRH119
Storm Motion358° @ 10 kt
0–1 km EHI0.7
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index27.1
Thermo & Levels
PWAT1.62 in
0–3 km LR4.1 °C/km
700–500 LR7.9 °C/km
Total Totals52.7
LCL971 hPa
LFC1004 hPa
EL207 hPa
Freezing Lvl14,925 ft