Excessive Heat Warning — Perry, MO, Bollinger, MO, Cape Girardeau, MO, Wayne, MO, Carter, MO, Ripley, MO, Butler, MO, Stoddard, MO, Scott, MO, Mississippi, MO, New Madrid, MO, 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 7:00 PM Heat Advisory — Perry, MO, Bollinger, MO, Cape Girardeau, MO, Wayne, MO, Carter, MO, Ripley, MO, Butler, MO, Stoddard, MO, Scott, MO, Mississippi, MO, New Madrid, MO, 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 7:00 PM

McLean County, Kentucky, United States

Last updated: 12:14 PM CDT  ·  Refresh
29°C
Feels like 35°
Mostly Cloudy
▲ 34°  /  ▼ 22°
Wind
2 mph SSW
Humidity
81%
Dew Point
26°
Pressure
29.54 inHg
Visibility
6 mi
UV Index
7.6
Cloud Cover
65%
Sunrise
5:48 AM
Sunset
8:02 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: McLean County is currently mostly cloudy at 29°C. Precipitation is likely — peak probability 78% around 11 PM. Atmospheric instability is elevated (CAPE up to 4097 J/kg) — isolated convective development possible. Sunrise: 5:48AM · Sunset: 8:02PM.

Alerts

Excessive Heat Warning
Perry, MO, Bollinger, MO, Cape Girardeau, MO, Wayne, MO, Carter, MO, Ripley, MO, Butler, MO, Stoddard, MO, Scott, MO, Mississippi, MO, New Madrid, MO, 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
Expires 7:00 PM
Heat Advisory
Perry, MO, Bollinger, MO, Cape Girardeau, MO, Wayne, MO, Carter, MO, Ripley, MO, Butler, MO, Stoddard, MO, Scott, MO, Mississippi, MO, New Madrid, MO, 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
Expires 7:00 PM
54 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
29°
26%
1 PM
32°
44%
2 PM
32°
28%
3 PM
33°
32%
4 PM
33°
40%
5 PM
34°
49%
6 PM
33°
50%
7 PM
32°
55%
8 PM
31°
56%
9 PM
28°
56%
10 PM
27°
71%
11 PM
27°
77%
12 AM
26°
72%
1 AM
24°
59%
2 AM
24°
54%
3 AM
23°
58%
4 AM
23°
63%
5 AM
22°
63%
6 AM
22°
59%
7 AM
23°
48%
8 AM
23°
49%
9 AM
26°
44%
10 AM
26°
45%
11 AM
27°
35%
7-Day Forecast
Today
34° 22°
Partly Cloudy with a 56% chance of rain.
Mon
34° 22°
Partly Cloudy with a 72% chance of rain.
Tue
35° 21°
Mostly Clear with a 42% chance of rain.
Wed
29° 19°
Partly Cloudy with a 21% chance of rain.
Thu
30° 17°
Clear.
Fri
29° 19°
Clear with a 35% chance of rain.
Sat
30° 18°
Rain, 81% chance.
TimeTempConditionsPrecipWindHumidity
Now 29° Mostly Cloudy 26% 2 mph SSW 81%
1 PM 32° Partly Cloudy 44% 4 mph SW 77%
2 PM 32° Partly Cloudy 28% 5 mph WSW 73%
3 PM 33° Partly Cloudy 32% 6 mph WSW 71%
4 PM 33° Partly Cloudy 40% 7 mph WSW 70%
5 PM 34° Partly Cloudy 49% 6 mph WSW 73%
6 PM 33° Mostly Clear 50% 6 mph WSW 77%
7 PM 32° Partly Cloudy 55% 4 mph SW 81%
8 PM 31° Partly Cloudy 56% 5 mph S 86%
9 PM 28° Mostly Cloudy 56% 7 mph SE 90%
10 PM 27° Mostly Cloudy 71% 8 mph ESE 93%
11 PM 27° Mostly Cloudy 77% 8 mph SE 91%
12 AM 26° Rain 72% 9 mph SW 89%
1 AM 24° Drizzle 59% 11 mph WSW 88%
2 AM 24° Drizzle 54% 10 mph SW 90%
3 AM 23° Rain 58% 10 mph SSW 93%
4 AM 23° Rain 63% 11 mph WSW 94%
5 AM 22° Overcast 63% 9 mph WSW 95%
6 AM 22° Overcast 59% 7 mph WSW 96%
7 AM 23° Overcast 48% 8 mph SW 95%
8 AM 23° Mostly Cloudy 49% 7 mph SW 92%
9 AM 26° Mostly Cloudy 44% 7 mph SW 89%
10 AM 26° Mostly Cloudy 45% 7 mph SW 86%
11 AM 27° Partly Cloudy 35% 7 mph SW 83%
15-Day Forecast
Today
7/26
Partly Cloudy
56%
22°
34°
Mon
7/27
Partly Cloudy
72%
22°
34°
Tue
7/28
Mostly Clear
42%
21°
35°
Wed
7/29
Partly Cloudy
21%
19°
29°
Thu
7/30
Clear
8%
17°
30°
Fri
7/31
Clear
35%
19°
29°
Sat
8/1
Rain
81%
18°
30°
Sun
8/2
Drizzle
60%
19°
30°
Mon
8/3
Drizzle
60%
19°
31°
Tue
8/4
Drizzle
60%
21°
32°
Wed
8/5
Drizzle
60%
22°
33°
Thu
8/6
Drizzle
60%
21°
32°
Fri
8/7
Drizzle
60%
20°
32°
Sat
8/8
Drizzle
60%
20°
32°
Sun
8/9
Drizzle
60%
21°
32°
54
Moderate
U.S. Air Quality Index · Dominant: PM2.5
50 100 150 200

Air quality is acceptable. Unusually sensitive people should consider limiting prolonged outdoor exertion.

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
Dominant
54 AQI 10.7 µg/m³
O3
Ground-level ozone
35 AQI 38 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Mon 54 Moderate 35 54
Tue 46 Good 33 46
Wed 52 Moderate 40 52
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 Sun Jul 26, 16:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 50 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE3795 J/kg
MLCAPE3072 J/kg
MUCAPE3795 J/kg
SBCIN0 J/kg
MLCIN0 J/kg
Lifted Index-6.8
Kinematics
0–6 km Shear27 kt
0–1 km Shear6 kt
Eff. Shear36 kt
0–1 km SRH9
0–3 km SRH-53
Eff. SRH-53
Storm Motion302° @ 22 kt
0–1 km EHI0.2
Composite Parameters
Sig. Tornado0.2
STP (eff)0.0
Supercell0.0
K-Index27.4
Thermo & Levels
PWAT1.73 in
0–3 km LR5.8 °C/km
700–500 LR5.8 °C/km
Total Totals46.1
LCL951 hPa
LFC1000 hPa
EL145 hPa
Freezing Lvl16,480 ft