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

Lewis County, Missouri, United States

Last updated: 6:52 PM CDT  ·  Refresh
32°C
Feels like 38°
Mostly Clear
▲ 33°  /  ▼ 23°
Wind
8 mph SSW
Humidity
66%
Dew Point
24°
Pressure
29.31 inHg
Visibility
10 mi
UV Index
4.2
Cloud Cover
21%
Sunrise
5:42 AM
Sunset
8:39 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Lewis County is currently mostly clear at 32°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 3777 J/kg) — isolated convective development possible. Sunrise: 5:42AM · Sunset: 8:39PM.

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
47 AQI · Good Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
32°
29%
7 PM
31°
45%
8 PM
30°
45%
9 PM
28°
44%
10 PM
27°
37%
11 PM
26°
37%
12 AM
26°
30%
1 AM
25°
27%
2 AM
25°
16%
3 AM
24°
16%
4 AM
24°
16%
5 AM
23°
17%
6 AM
23°
17%
7 AM
25°
38%
8 AM
26°
42%
9 AM
28°
42%
10 AM
28°
33%
11 AM
29°
33%
12 PM
29°
34%
1 PM
32°
34%
2 PM
32°
34%
3 PM
32°
34%
4 PM
32°
34%
5 PM
32°
31%
7-Day Forecast
Tonight
33° 23°
Mostly Clear with a 44% chance of rain.
Fri
33° 23°
Partly Cloudy with a 42% chance of rain.
Sat
31° 22°
Mostly Cloudy with a 55% 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°
Overcast with a 30% chance of rain.
Wed
31° 20°
Clear with a 42% chance of rain.
TimeTempConditionsPrecipWindHumidity
Now 32° Mostly Clear 29% 8 mph SSW 66%
7 PM 31° Partly Cloudy 45% 8 mph SSW 72%
8 PM 30° Partly Cloudy 45% 8 mph SSW 76%
9 PM 28° Partly Cloudy 44% 8 mph SSW 80%
10 PM 27° Partly Cloudy 37% 8 mph S 83%
11 PM 26° Partly Cloudy 37% 7 mph S 85%
12 AM 26° Partly Cloudy 30% 7 mph S 87%
1 AM 25° Partly Cloudy 27% 6 mph SSW 88%
2 AM 25° Mostly Clear 16% 6 mph SSW 89%
3 AM 24° Mostly Clear 16% 6 mph SSW 89%
4 AM 24° Mostly Clear 16% 6 mph SSW 91%
5 AM 23° Partly Cloudy 17% 6 mph SSW 91%
6 AM 23° Partly Cloudy 17% 6 mph SSW 91%
7 AM 25° Partly Cloudy 38% 7 mph SSW 85%
8 AM 26° Partly Cloudy 42% 7 mph SW 80%
9 AM 28° Partly Cloudy 42% 8 mph SW 76%
10 AM 28° Partly Cloudy 33% 7 mph SW 73%
11 AM 29° Partly Cloudy 33% 8 mph SW 70%
12 PM 29° Partly Cloudy 34% 9 mph SSW 67%
1 PM 32° Partly Cloudy 34% 8 mph SSW 67%
2 PM 32° Partly Cloudy 34% 8 mph SSW 66%
3 PM 32° Partly Cloudy 34% 9 mph SSW 65%
4 PM 32° Partly Cloudy 34% 8 mph SSW 67%
5 PM 32° Partly Cloudy 31% 7 mph SSW 69%
15-Day Forecast
Today
7/2
Mostly Clear
44%
23°
33°
Fri
7/3
Partly Cloudy
42%
23°
33°
Sat
7/4
Mostly Cloudy
55%
22°
31°
Sun
7/5
Partly Cloudy
71%
20°
31°
Mon
7/6
Clear
29%
19°
29°
Tue
7/7
Overcast
30%
19°
29°
Wed
7/8
Clear
42%
20°
31°
Thu
7/9
Partly Cloudy
28%
21°
30°
Fri
7/10
Rain
69%
20°
30°
Sat
7/11
Thunderstorm
68%
20°
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°
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 8.6 µg/m³
O3
Ground-level ozone
29 AQI 32 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Fri 47 Good 29 47
Sat 56 Moderate 33 56
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
SBCAPE3801 J/kg
MLCAPE2881 J/kg
MUCAPE3801 J/kg
SBCIN-55 J/kg
MLCIN0 J/kg
Lifted Index-8.6
Kinematics
0–6 km Shear27 kt
0–1 km Shear11 kt
Eff. Shear29 kt
0–1 km SRH16
0–3 km SRH-24
Eff. SRH-24
Storm Motion203° @ 32 kt
0–1 km EHI0.4
Composite Parameters
Sig. Tornado0.2
STP (eff)0.0
Supercell0.0
K-Index32.9
Thermo & Levels
PWAT1.87 in
0–3 km LR6.9 °C/km
700–500 LR6.6 °C/km
Total Totals51.4
LCL889 hPa
LFC850 hPa
EL140 hPa
Freezing Lvl15,236 ft