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

Lewis County, Missouri, United States

Last updated: 5:13 AM CDT  ·  Refresh
24°C
Feels like 27°
Mostly Clear
▲ 35°  /  ▼ 23°
Wind
6 mph SSW
Humidity
78%
Dew Point
22°
Pressure
29.25 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
20%
Sunrise
6:14 AM
Sunset
8:08 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Lewis County is currently mostly clear at 25°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 3741 J/kg) — isolated convective development possible. Sunrise: 6:14AM · Sunset: 8:08PM.

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
49 AQI · Good Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
24°
9%
6 AM
23°
23%
7 AM
24°
21%
8 AM
26°
24%
9 AM
27°
29%
10 AM
29°
33%
11 AM
30°
21%
12 PM
31°
21%
1 PM
33°
9%
2 PM
33°
21%
3 PM
34°
21%
4 PM
34°
22%
5 PM
34°
22%
6 PM
34°
27%
7 PM
33°
28%
8 PM
31°
28%
9 PM
29°
22%
10 PM
28°
22%
11 PM
27°
25%
12 AM
26°
26%
1 AM
26°
26%
2 AM
26°
27%
3 AM
26°
24%
4 AM
24°
37%
7-Day Forecast
Today
35° 23°
Mostly Cloudy with a 28% chance of rain.
Wed
34° 23°
Partly Cloudy with a 68% chance of rain.
Thu
33° 22°
Partly Cloudy with a 86% chance of rain.
Fri
30° 20°
Overcast with a 81% chance of rain.
Sat
36° 23°
Mostly Clear with a 29% chance of rain.
Sun
32° 19°
Drizzle, 53% chance.
Mon
30° 18°
Clear with a 49% chance of rain.
TimeTempConditionsPrecipWindHumidity
Now 24° Mostly Clear 9% 6 mph SSW 78%
6 AM 23° Partly Cloudy 23% 7 mph SSW 73%
7 AM 24° Mostly Cloudy 21% 8 mph SSW 71%
8 AM 26° Mostly Cloudy 24% 10 mph SW 66%
9 AM 27° Mostly Cloudy 29% 12 mph SW 61%
10 AM 29° Mostly Cloudy 33% 13 mph WSW 58%
11 AM 30° Partly Cloudy 21% 14 mph SW 54%
12 PM 31° Partly Cloudy 21% 15 mph SW 50%
1 PM 33° Partly Cloudy 9% 15 mph SW 48%
2 PM 33° Partly Cloudy 21% 15 mph SW 47%
3 PM 34° Mostly Cloudy 21% 14 mph SW 47%
4 PM 34° Mostly Cloudy 22% 14 mph SW 47%
5 PM 34° Mostly Cloudy 22% 12 mph SW 50%
6 PM 34° Mostly Cloudy 27% 10 mph SW 52%
7 PM 33° Mostly Cloudy 28% 8 mph SW 57%
8 PM 31° Partly Cloudy 28% 6 mph SSW 64%
9 PM 29° Partly Cloudy 22% 5 mph S 71%
10 PM 28° Partly Cloudy 22% 5 mph S 77%
11 PM 27° Partly Cloudy 25% 5 mph SSE 79%
12 AM 26° Partly Cloudy 26% 6 mph SSE 80%
1 AM 26° Mostly Clear 26% 6 mph SSE 81%
2 AM 26° Partly Cloudy 27% 5 mph SSE 84%
3 AM 26° Partly Cloudy 24% 5 mph S 87%
4 AM 24° Mostly Clear 37% 5 mph SSE 88%
15-Day Forecast
Today
8/11
Mostly Cloudy
28%
23°
35°
Wed
8/12
Partly Cloudy
68%
23°
34°
Thu
8/13
Partly Cloudy
86%
22°
33°
Fri
8/14
Overcast
81%
20°
30°
Sat
8/15
Mostly Clear
29%
23°
36°
Sun
8/16
Drizzle
53%
19°
32°
Mon
8/17
Clear
49%
18°
30°
Tue
8/18
Mostly Clear
34%
19°
36°
Wed
8/19
Mostly Cloudy
35%
21°
36°
Thu
8/20
Mostly Clear
35%
22°
41°
Fri
8/21
Drizzle
60%
19°
41°
Sat
8/22
Drizzle
60%
19°
33°
Sun
8/23
Drizzle
60%
19°
32°
Mon
8/24
Drizzle
60%
18°
31°
Tue
8/25
Drizzle
60%
18°
29°
49
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
49 AQI 8.8 µg/m³
O3
Ground-level ozone
36 AQI 39 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 49 Good 36 49
Wed 37 Good 37 29
Thu 43 Good 37 43
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
SBCAPE1436 J/kg
MLCAPE1580 J/kg
MUCAPE2104 J/kg
SBCIN-600 J/kg
MLCIN0 J/kg
Lifted Index-5.1
Kinematics
0–6 km Shear19 kt
0–1 km Shear21 kt
Eff. Shear8 kt
0–1 km SRH162
0–3 km SRH163
Eff. SRH-7
Storm Motion324° @ 13 kt
0–1 km EHI1.5
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index30.3
Thermo & Levels
PWAT1.51 in
0–3 km LR4.0 °C/km
700–500 LR7.9 °C/km
Total Totals51.3
LCL949 hPa
LFC647 hPa
EL188 hPa
Freezing Lvl14,678 ft