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

Knox County, Missouri, United States

Last updated: 6:57 PM CDT  ·  Refresh
31°C
Feels like 38°
Mostly Clear
▲ 32°  /  ▼ 23°
Wind
10 mph SSW
Humidity
68%
Dew Point
24°
Pressure
29.14 inHg
Visibility
10 mi
UV Index
4.2
Cloud Cover
11%
Sunrise
5:43 AM
Sunset
8:41 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Knox County is currently mostly clear at 31°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 3813 J/kg) — isolated convective development possible. Sunrise: 5:43AM · Sunset: 8:41PM.

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°
18%
7 PM
31°
35%
8 PM
30°
35%
9 PM
28°
34%
10 PM
27°
26%
11 PM
26°
19%
12 AM
26°
15%
1 AM
25°
10%
2 AM
25°
19%
3 AM
24°
8%
4 AM
24°
16%
5 AM
23°
19%
6 AM
23°
17%
7 AM
25°
29%
8 AM
26°
42%
9 AM
28°
42%
10 AM
28°
26%
11 AM
29°
33%
12 PM
30°
34%
1 PM
31°
34%
2 PM
32°
34%
3 PM
32°
34%
4 PM
32°
30%
5 PM
32°
31%
7-Day Forecast
Tonight
32° 23°
Mostly Clear with a 34% chance of rain.
Fri
33° 23°
Partly Cloudy with a 42% chance of rain.
Sat
31° 21°
Partly Cloudy with a 70% chance of rain.
Sun
31° 20°
Partly Cloudy with a 71% chance of rain.
Mon
29° 19°
Clear with a 29% chance of rain.
Tue
29° 19°
Drizzle, 51% chance.
Wed
31° 20°
Clear with a 42% chance of rain.
TimeTempConditionsPrecipWindHumidity
Now 31° Mostly Clear 18% 10 mph SSW 68%
7 PM 31° Mostly Clear 35% 8 mph SSW 73%
8 PM 30° Partly Cloudy 35% 8 mph SSW 77%
9 PM 28° Partly Cloudy 34% 8 mph SSW 81%
10 PM 27° Partly Cloudy 26% 7 mph SSW 83%
11 PM 26° Partly Cloudy 19% 8 mph SSW 84%
12 AM 26° Partly Cloudy 15% 8 mph S 85%
1 AM 25° Mostly Clear 10% 8 mph S 86%
2 AM 25° Mostly Clear 19% 8 mph SSW 88%
3 AM 24° Clear 8% 7 mph SSW 89%
4 AM 24° Partly Cloudy 16% 7 mph SSW 91%
5 AM 23° Partly Cloudy 19% 7 mph SSW 90%
6 AM 23° Partly Cloudy 17% 8 mph SSW 89%
7 AM 25° Partly Cloudy 29% 8 mph SW 84%
8 AM 26° Partly Cloudy 42% 8 mph SW 81%
9 AM 28° Partly Cloudy 42% 8 mph SW 78%
10 AM 28° Partly Cloudy 26% 8 mph SW 74%
11 AM 29° Mostly Cloudy 33% 9 mph SW 69%
12 PM 30° Mostly Cloudy 34% 10 mph SSW 66%
1 PM 31° Mostly Cloudy 34% 10 mph SSW 65%
2 PM 32° Mostly Cloudy 34% 10 mph SSW 65%
3 PM 32° Mostly Cloudy 34% 10 mph SSW 65%
4 PM 32° Partly Cloudy 30% 9 mph SSW 67%
5 PM 32° Partly Cloudy 31% 8 mph SSW 69%
15-Day Forecast
Today
7/2
Mostly Clear
34%
23°
32°
Fri
7/3
Partly Cloudy
42%
23°
33°
Sat
7/4
Partly Cloudy
70%
21°
31°
Sun
7/5
Partly Cloudy
71%
20°
31°
Mon
7/6
Clear
29%
19°
29°
Tue
7/7
Drizzle
51%
19°
29°
Wed
7/8
Clear
42%
20°
31°
Thu
7/9
Partly Cloudy
41%
20°
30°
Fri
7/10
Rain
69%
20°
30°
Sat
7/11
Thunderstorm
68%
19°
33°
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%
18°
28°
Thu
7/16
Drizzle
60%
19°
29°
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
33 AQI 37 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Fri 48 Good 33 48
Sat 54 Moderate 36 54
Sun 58 Moderate 32 58
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
SBCAPE3735 J/kg
MLCAPE2972 J/kg
MUCAPE3735 J/kg
SBCIN-45 J/kg
MLCIN0 J/kg
Lifted Index-8.6
Kinematics
0–6 km Shear28 kt
0–1 km Shear10 kt
Eff. Shear30 kt
0–1 km SRH12
0–3 km SRH-27
Eff. SRH-27
Storm Motion204° @ 33 kt
0–1 km EHI0.3
Composite Parameters
Sig. Tornado0.2
STP (eff)0.0
Supercell0.0
K-Index31.5
Thermo & Levels
PWAT1.77 in
0–3 km LR6.8 °C/km
700–500 LR6.6 °C/km
Total Totals51.3
LCL887 hPa
LFC848 hPa
EL141 hPa
Freezing Lvl15,069 ft