Excessive Heat Watch 12:00 AM Heat Advisory — Knox, MO, Lewis, MO, Shelby, MO, Marion, MO, Monroe, MO, Ralls, MO, Pike, MO, Boone, MO, Audrain, MO, Moniteau, MO, Cole, MO, Osage, MO, Callaway, MO, Montgomery, MO, Lincoln, MO, Gasconade, MO, Crawford, MO, Washington, MO, St. Francois, MO, Iron, MO, Madison, MO, Reynolds, MO, Warren, MO, St. Charles, MO, Franklin, MO, St. Louis, MO, St. Louis City, MO, Jefferson, MO, Ste. Genevieve, MO 10:00 PM Excessive Heat Warning — 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, Ste. Genevieve, MO, 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, Iron, MO, Madison, MO, Reynolds, MO 8:00 PM

Shelby County, Missouri, United States

Last updated: 6:59 PM CDT  ·  Refresh
31°C
Feels like 38°
Mostly Clear
▲ 33°  /  ▼ 23°
Wind
10 mph SSW
Humidity
67%
Dew Point
24°
Pressure
29.18 inHg
Visibility
10 mi
UV Index
4.0
Cloud Cover
25%
Sunrise
5:44 AM
Sunset
8:40 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Shelby County is currently mostly clear at 31°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 3495 J/kg) — isolated convective development possible. Sunrise: 5:44AM · Sunset: 8:40PM.

Alerts

Excessive Heat Watch
Expires 12:00 AM
Heat Advisory
Knox, MO, Lewis, MO, Shelby, MO, Marion, MO, Monroe, MO, Ralls, MO, Pike, MO, Boone, MO, Audrain, MO, Moniteau, MO, Cole, MO, Osage, MO, Callaway, MO, Montgomery, MO, Lincoln, MO, Gasconade, MO, Crawford, MO, Washington, MO, St. Francois, MO, Iron, MO, Madison, MO, Reynolds, MO, Warren, MO, St. Charles, MO, Franklin, MO, St. Louis, MO, St. Louis City, MO, Jefferson, MO, Ste. Genevieve, MO
Expires 10:00 PM
Excessive Heat Warning
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, Ste. Genevieve, MO, 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, Iron, MO, Madison, MO, Reynolds, MO
Expires 8:00 PM
48 AQI · Good Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
31°
13%
7 PM
31°
38%
8 PM
30°
38%
9 PM
28°
38%
10 PM
27°
35%
11 PM
27°
37%
12 AM
26°
46%
1 AM
25°
45%
2 AM
24°
34%
3 AM
24°
20%
4 AM
24°
13%
5 AM
23°
13%
6 AM
23°
8%
7 AM
25°
8%
8 AM
26°
15%
9 AM
28°
15%
10 AM
29°
18%
11 AM
29°
15%
12 PM
30°
18%
1 PM
31°
18%
2 PM
32°
18%
3 PM
32°
14%
4 PM
32°
14%
5 PM
32°
14%
7-Day Forecast
Tonight
33° 23°
Mostly Clear with a 38% chance of rain.
Fri
33° 23°
Partly Cloudy with a 46% chance of rain.
Sat
31° 22°
Partly Cloudy with a 59% chance of rain.
Sun
30° 20°
Partly Cloudy with a 62% chance of rain.
Mon
29° 19°
Clear with a 29% chance of rain.
Tue
29° 19°
Overcast.
Wed
31° 20°
Clear with a 28% chance of rain.
TimeTempConditionsPrecipWindHumidity
Now 31° Mostly Clear 13% 10 mph SSW 67%
7 PM 31° Partly Cloudy 38% 8 mph SSW 72%
8 PM 30° Partly Cloudy 38% 7 mph SSW 76%
9 PM 28° Partly Cloudy 38% 7 mph SSW 80%
10 PM 27° Partly Cloudy 35% 7 mph S 82%
11 PM 27° Partly Cloudy 37% 8 mph S 85%
12 AM 26° Partly Cloudy 46% 9 mph S 88%
1 AM 25° Mostly Clear 45% 8 mph S 90%
2 AM 24° Mostly Clear 34% 8 mph SSW 91%
3 AM 24° Clear 20% 7 mph SSW 92%
4 AM 24° Clear 13% 7 mph SSW 92%
5 AM 23° Mostly Clear 13% 6 mph SSW 92%
6 AM 23° Partly Cloudy 8% 7 mph SSW 90%
7 AM 25° Partly Cloudy 8% 8 mph SSW 85%
8 AM 26° Partly Cloudy 15% 8 mph SW 79%
9 AM 28° Mostly Cloudy 15% 9 mph SW 74%
10 AM 29° Partly Cloudy 18% 8 mph SW 72%
11 AM 29° Partly Cloudy 15% 9 mph SW 67%
12 PM 30° Partly Cloudy 18% 9 mph SW 65%
1 PM 31° Mostly Cloudy 18% 9 mph SW 64%
2 PM 32° Mostly Cloudy 18% 9 mph SSW 63%
3 PM 32° Mostly Cloudy 14% 9 mph SSW 62%
4 PM 32° Mostly Cloudy 14% 8 mph SSW 64%
5 PM 32° Partly Cloudy 14% 8 mph SSW 66%
15-Day Forecast
Today
7/2
Mostly Clear
38%
23°
33°
Fri
7/3
Partly Cloudy
46%
23°
33°
Sat
7/4
Partly Cloudy
59%
22°
31°
Sun
7/5
Partly Cloudy
62%
20°
30°
Mon
7/6
Clear
29%
19°
29°
Tue
7/7
Overcast
17%
19°
29°
Wed
7/8
Clear
28%
20°
31°
Thu
7/9
Partly Cloudy
28%
21°
30°
Fri
7/10
Rain
69%
21°
31°
Sat
7/11
Thunderstorm
68%
20°
32°
Sun
7/12
Drizzle
64%
19°
27°
Mon
7/13
Drizzle
60%
18°
28°
Tue
7/14
Drizzle
60%
18°
28°
Wed
7/15
Drizzle
60%
19°
29°
Thu
7/16
Drizzle
60%
19°
30°
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 8.6 µg/m³
O3
Ground-level ozone
28 AQI 31 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Fri 48 Good 28 48
Sat 57 Moderate 32 57
Sun 59 Moderate 31 59
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 Thu Jul 2, 22:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE3641 J/kg
MLCAPE3144 J/kg
MUCAPE3641 J/kg
SBCIN-46 J/kg
MLCIN0 J/kg
Lifted Index-8.4
Kinematics
0–6 km Shear26 kt
0–1 km Shear9 kt
Eff. Shear28 kt
0–1 km SRH16
0–3 km SRH-26
Eff. SRH-26
Storm Motion202° @ 32 kt
0–1 km EHI0.4
Composite Parameters
Sig. Tornado0.2
STP (eff)0.0
Supercell0.0
K-Index33.6
Thermo & Levels
PWAT1.88 in
0–3 km LR6.8 °C/km
700–500 LR6.6 °C/km
Total Totals51.4
LCL885 hPa
LFC846 hPa
EL142 hPa
Freezing Lvl15,010 ft