Extreme Heat Warning — Clinton, IL, Washington, IL, Randolph, IL, Madison, IL, St. Clair, IL, Monroe, IL, Boone, MO, Moniteau, MO, Cole, MO, Osage, MO, Callaway, MO, Montgomery, MO, Gasconade, MO, Warren, MO, St. Charles, MO, Franklin, MO, St. Louis, MO, St. Louis City, MO, Jefferson, MO 8:00 PM Heat Advisory — Greene, IL, Macoupin, IL, Montgomery, IL, Bond, IL, Fayette, IL, Marion, IL, Adams, IL, Brown, IL, Pike, IL, Calhoun, IL, Jersey, IL, Knox, MO, Lewis, MO, Shelby, MO, Marion, MO, Monroe, MO, Ralls, MO, Pike, MO, Audrain, MO, Lincoln, MO, Crawford, MO, Washington, MO, St. Francois, MO, Ste. Genevieve, MO, Iron, MO, Madison, MO, Reynolds, MO 8:00 PM

Shelby County, Missouri, United States

Last updated: 5:15 AM CDT  ·  Refresh
24°C
Feels like 26°
Mostly Clear
▲ 34°  /  ▼ 24°
Wind
7 mph SSW
Humidity
76%
Dew Point
21°
Pressure
29.12 inHg
Visibility
9 mi
UV Index
0.0
Cloud Cover
23%
Sunrise
6:16 AM
Sunset
8:09 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Shelby County is currently mostly clear at 24°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 3860 J/kg) — isolated convective development possible. Sunrise: 6:16AM · Sunset: 8:09PM.

Alerts

Extreme Heat Warning
Clinton, IL, Washington, IL, Randolph, IL, Madison, IL, St. Clair, IL, Monroe, IL, Boone, MO, Moniteau, MO, Cole, MO, Osage, MO, Callaway, MO, Montgomery, MO, Gasconade, MO, Warren, MO, St. Charles, MO, Franklin, MO, St. Louis, MO, St. Louis City, MO, Jefferson, MO
Expires 8:00 PM
Heat Advisory
Greene, IL, Macoupin, IL, Montgomery, IL, Bond, IL, Fayette, IL, Marion, IL, Adams, IL, Brown, IL, Pike, IL, Calhoun, IL, Jersey, IL, Knox, MO, Lewis, MO, Shelby, MO, Marion, MO, Monroe, MO, Ralls, MO, Pike, MO, Audrain, MO, Lincoln, MO, Crawford, MO, Washington, MO, St. Francois, MO, Ste. Genevieve, MO, Iron, MO, Madison, MO, Reynolds, MO
Expires 8:00 PM
47 AQI · Good Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
24°
7%
6 AM
23°
21%
7 AM
24°
20%
8 AM
26°
20%
9 AM
26°
20%
10 AM
27°
20%
11 AM
29°
20%
12 PM
30°
20%
1 PM
32°
7%
2 PM
32°
16%
3 PM
33°
20%
4 PM
33°
20%
5 PM
34°
20%
6 PM
33°
21%
7 PM
32°
21%
8 PM
31°
28%
9 PM
28°
29%
10 PM
27°
29%
11 PM
27°
30%
12 AM
26°
33%
1 AM
26°
34%
2 AM
26°
31%
3 AM
25°
32%
4 AM
25°
32%
7-Day Forecast
Today
34° 24°
Partly Cloudy with a 30% chance of rain.
Wed
35° 24°
Mostly Clear with a 57% chance of rain.
Thu
32° 23°
Partly Cloudy with a 80% chance of rain.
Fri
31° 19°
Overcast with a 46% chance of rain.
Sat
36° 24°
Partly Cloudy.
Sun
32° 20°
Drizzle, 53% chance.
Mon
30° 18°
Clear with a 49% chance of rain.
TimeTempConditionsPrecipWindHumidity
Now 24° Mostly Clear 7% 7 mph SSW 76%
6 AM 23° Partly Cloudy 21% 8 mph SW 72%
7 AM 24° Mostly Cloudy 20% 9 mph SW 71%
8 AM 26° Mostly Cloudy 20% 11 mph SW 68%
9 AM 26° Mostly Cloudy 20% 13 mph SW 65%
10 AM 27° Mostly Cloudy 20% 14 mph SW 62%
11 AM 29° Mostly Cloudy 20% 14 mph SW 59%
12 PM 30° Partly Cloudy 20% 14 mph SW 56%
1 PM 32° Partly Cloudy 7% 14 mph SW 53%
2 PM 32° Partly Cloudy 16% 14 mph SW 52%
3 PM 33° Partly Cloudy 20% 13 mph SW 51%
4 PM 33° Partly Cloudy 20% 13 mph SW 52%
5 PM 34° Partly Cloudy 20% 11 mph SW 55%
6 PM 33° Mostly Cloudy 21% 8 mph SW 60%
7 PM 32° Mostly Cloudy 21% 7 mph SW 65%
8 PM 31° Partly Cloudy 28% 6 mph SSW 70%
9 PM 28° Partly Cloudy 29% 5 mph SSW 74%
10 PM 27° Partly Cloudy 29% 6 mph S 78%
11 PM 27° Partly Cloudy 30% 6 mph S 80%
12 AM 26° Mostly Clear 33% 6 mph S 82%
1 AM 26° Mostly Clear 34% 6 mph S 83%
2 AM 26° Partly Cloudy 31% 6 mph S 84%
3 AM 25° Partly Cloudy 32% 6 mph S 84%
4 AM 25° Partly Cloudy 32% 5 mph S 84%
15-Day Forecast
Today
8/11
Partly Cloudy
30%
24°
34°
Wed
8/12
Mostly Clear
57%
24°
35°
Thu
8/13
Partly Cloudy
80%
23°
32°
Fri
8/14
Overcast
46%
19°
31°
Sat
8/15
Partly Cloudy
15%
24°
36°
Sun
8/16
Drizzle
53%
20°
32°
Mon
8/17
Clear
49%
18°
30°
Tue
8/18
Rain
53%
19°
36°
Wed
8/19
Partly Cloudy
35%
21°
36°
Thu
8/20
Mostly Clear
35%
22°
41°
Fri
8/21
Drizzle
60%
20°
41°
Sat
8/22
Clear
60%
20°
34°
Sun
8/23
Drizzle
60%
19°
33°
Mon
8/24
Drizzle
60%
19°
31°
Tue
8/25
Drizzle
60%
19°
30°
47
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
47 AQI 8.5 µg/m³
O3
Ground-level ozone
33 AQI 36 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 47 Good 33 47
Wed 33 Good 33 28
Thu 44 Good 33 44
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 Tue Aug 11, 08:00'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
SBCAPE1212 J/kg
MLCAPE1407 J/kg
MUCAPE2098 J/kg
SBCIN-668 J/kg
MLCIN0 J/kg
Lifted Index-4.6
Kinematics
0–6 km Shear17 kt
0–1 km Shear19 kt
Eff. Shear—
0–1 km SRH133
0–3 km SRH139
Eff. SRH—
Storm Motion330° @ 12 kt
0–1 km EHI1.0
Composite Parameters
Sig. Tornado0.0
STP (eff)—
Supercell—
K-Index27.1
Thermo & Levels
PWAT1.37 in
0–3 km LR3.9 °C/km
700–500 LR7.9 °C/km
Total Totals51.0
LCL942 hPa
LFC640 hPa
EL199 hPa
Freezing Lvl14,514 ft