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

Boone County, Missouri, United States

Last updated: 6:54 PM CDT  ·  Refresh
31°C
Feels like 37°
Partly Cloudy
▲ 33°  /  ▼ 23°
Wind
9 mph S
Humidity
71%
Dew Point
24°
Pressure
29.19 inHg
Visibility
10 mi
UV Index
3.8
Cloud Cover
54%
Sunrise
5:47 AM
Sunset
8:38 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Boone County is currently partly cloudy at 31°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 3470 J/kg) — isolated convective development possible. Sunrise: 5:47AM · Sunset: 8:38PM.

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
50 AQI · Good Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
31°
21%
7 PM
31°
27%
8 PM
29°
27%
9 PM
28°
16%
10 PM
27°
16%
11 PM
27°
16%
12 AM
26°
4%
1 AM
25°
7%
2 AM
25°
8%
3 AM
24°
8%
4 AM
25°
16%
5 AM
23°
17%
6 AM
23°
17%
7 AM
24°
17%
8 AM
26°
20%
9 AM
28°
20%
10 AM
29°
15%
11 AM
30°
18%
12 PM
31°
14%
1 PM
32°
14%
2 PM
32°
14%
3 PM
32°
14%
4 PM
32°
14%
5 PM
32°
11%
7-Day Forecast
Tonight
33° 23°
Partly Cloudy with a 21% chance of rain.
Fri
33° 23°
Mostly Clear with a 20% chance of rain.
Sat
33° 22°
Partly Cloudy with a 28% chance of rain.
Sun
31° 21°
Mostly Cloudy with a 62% chance of rain.
Mon
31° 20°
Partly Cloudy.
Tue
31° 19°
Thunderstorm, 51% chance.
Wed
32° 21°
Clear with a 42% chance of rain.
TimeTempConditionsPrecipWindHumidity
Now 31° Partly Cloudy 21% 9 mph S 71%
7 PM 31° Partly Cloudy 27% 6 mph S 74%
8 PM 29° Partly Cloudy 27% 6 mph SSE 78%
9 PM 28° Mostly Cloudy 16% 6 mph SSE 80%
10 PM 27° Partly Cloudy 16% 6 mph SSE 83%
11 PM 27° Partly Cloudy 16% 7 mph SSE 86%
12 AM 26° Mostly Clear 4% 7 mph S 88%
1 AM 25° Partly Cloudy 7% 7 mph S 88%
2 AM 25° Mostly Clear 8% 6 mph S 89%
3 AM 24° Partly Cloudy 8% 6 mph S 89%
4 AM 25° Mostly Clear 16% 6 mph S 89%
5 AM 23° Mostly Clear 17% 6 mph S 89%
6 AM 23° Mostly Clear 17% 6 mph S 88%
7 AM 24° Partly Cloudy 17% 7 mph SSW 84%
8 AM 26° Mostly Clear 20% 7 mph SSW 79%
9 AM 28° Mostly Clear 20% 8 mph SSW 74%
10 AM 29° Mostly Clear 15% 7 mph SW 69%
11 AM 30° Mostly Clear 18% 7 mph SW 65%
12 PM 31° Partly Cloudy 14% 7 mph SW 61%
1 PM 32° Partly Cloudy 14% 7 mph SW 60%
2 PM 32° Partly Cloudy 14% 7 mph SSW 60%
3 PM 32° Partly Cloudy 14% 7 mph SSW 59%
4 PM 32° Partly Cloudy 14% 7 mph SSW 62%
5 PM 32° Partly Cloudy 11% 7 mph SSW 64%
15-Day Forecast
Today
7/2
Partly Cloudy
21%
23°
33°
Fri
7/3
Mostly Clear
20%
23°
33°
Sat
7/4
Partly Cloudy
28%
22°
33°
Sun
7/5
Mostly Cloudy
62%
21°
31°
Mon
7/6
Partly Cloudy
16%
20°
31°
Tue
7/7
Thunderstorm
51%
19°
31°
Wed
7/8
Clear
42%
21°
32°
Thu
7/9
Thunderstorm
61%
22°
32°
Fri
7/10
Rain
68%
21°
30°
Sat
7/11
Drizzle
44%
20°
33°
Sun
7/12
Rain
68%
19°
29°
Mon
7/13
Clear
60%
19°
29°
Tue
7/14
Drizzle
60%
19°
31°
Wed
7/15
Drizzle
60%
19°
31°
Thu
7/16
Clear
60%
20°
32°
50
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
50 AQI 9.1 µg/m³
O3
Ground-level ozone
27 AQI 30 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Fri 50 Good 27 50
Sat 58 Moderate 29 58
Sun 58 Moderate 30 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
SBCAPE3791 J/kg
MLCAPE3117 J/kg
MUCAPE3791 J/kg
SBCIN-52 J/kg
MLCIN0 J/kg
Lifted Index-8.7
Kinematics
0–6 km Shear23 kt
0–1 km Shear10 kt
Eff. Shear25 kt
0–1 km SRH9
0–3 km SRH-44
Eff. SRH-44
Storm Motion192° @ 30 kt
0–1 km EHI0.2
Composite Parameters
Sig. Tornado0.1
STP (eff)0.0
Supercell0.0
K-Index34.4
Thermo & Levels
PWAT1.93 in
0–3 km LR6.5 °C/km
700–500 LR6.7 °C/km
Total Totals51.4
LCL901 hPa
LFC848 hPa
EL139 hPa
Freezing Lvl14,984 ft