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: 7:57 PM CDT  ·  Refresh
29°C
Feels like 34°
Partly Cloudy
▲ 33°  /  ▼ 23°
Wind
7 mph S
Humidity
75%
Dew Point
24°
Pressure
29.19 inHg
Visibility
10 mi
UV Index
1.9
Cloud Cover
43%
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 29°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 3514 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
29°
16%
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°
7%
3 AM
24°
8%
4 AM
25°
16%
5 AM
23°
16%
6 AM
23°
17%
7 AM
25°
17%
8 AM
27°
17%
9 AM
28°
17%
10 AM
29°
11%
11 AM
31°
18%
12 PM
31°
15%
1 PM
33°
14%
2 PM
33°
7%
3 PM
33°
7%
4 PM
33°
7%
5 PM
33°
5%
6 PM
32°
5%
7-Day Forecast
Tonight
33° 23°
Partly Cloudy.
Fri
34° 23°
Mostly Clear.
Sat
33° 22°
Partly Cloudy with a 38% chance of rain.
Sun
31° 21°
Mostly Cloudy with a 56% chance of rain.
Mon
32° 20°
Mostly Cloudy.
Tue
31° 19°
Drizzle, 51% chance.
Wed
32° 21°
Thunderstorm, 42% chance.
TimeTempConditionsPrecipWindHumidity
Now 29° Partly Cloudy 16% 7 mph S 75%
8 PM 29° Partly Cloudy 27% 5 mph SSE 78%
9 PM 28° Overcast 16% 6 mph SE 81%
10 PM 27° Mostly Cloudy 16% 6 mph SSE 84%
11 PM 27° Mostly Cloudy 16% 6 mph SSE 87%
12 AM 26° Mostly Clear 4% 7 mph S 88%
1 AM 25° Mostly Clear 7% 6 mph S 89%
2 AM 25° Partly Cloudy 7% 6 mph S 89%
3 AM 24° Clear 8% 6 mph S 89%
4 AM 25° Clear 16% 6 mph S 89%
5 AM 23° Mostly Clear 16% 6 mph S 89%
6 AM 23° Mostly Clear 17% 6 mph S 88%
7 AM 25° Partly Cloudy 17% 7 mph SSW 84%
8 AM 27° Mostly Clear 17% 8 mph SSW 79%
9 AM 28° Mostly Clear 17% 8 mph SW 74%
10 AM 29° Mostly Clear 11% 8 mph SW 70%
11 AM 31° Mostly Clear 18% 8 mph SW 65%
12 PM 31° Mostly Clear 15% 8 mph SW 61%
1 PM 33° Partly Cloudy 14% 7 mph SW 60%
2 PM 33° Partly Cloudy 7% 8 mph SSW 58%
3 PM 33° Partly Cloudy 7% 8 mph SSW 58%
4 PM 33° Partly Cloudy 7% 8 mph SSW 61%
5 PM 33° Mostly Clear 5% 7 mph SSW 63%
6 PM 32° Mostly Clear 5% 7 mph SSW 66%
15-Day Forecast
Today
7/2
Partly Cloudy
16%
23°
33°
Fri
7/3
Mostly Clear
17%
23°
34°
Sat
7/4
Partly Cloudy
38%
22°
33°
Sun
7/5
Mostly Cloudy
56%
21°
31°
Mon
7/6
Mostly Cloudy
16%
20°
32°
Tue
7/7
Drizzle
51%
19°
31°
Wed
7/8
Thunderstorm
42%
21°
32°
Thu
7/9
Thunderstorm
61%
22°
34°
Fri
7/10
Rain
68%
21°
30°
Sat
7/11
Thunderstorm
51%
20°
34°
Sun
7/12
Rain
68%
19°
30°
Mon
7/13
Clear
60%
19°
30°
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
Today 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, 23:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE3411 J/kg
MLCAPE2877 J/kg
MUCAPE3411 J/kg
SBCIN-90 J/kg
MLCIN0 J/kg
Lifted Index-7.8
Kinematics
0–6 km Shear24 kt
0–1 km Shear14 kt
Eff. Shear25 kt
0–1 km SRH8
0–3 km SRH-27
Eff. SRH-27
Storm Motion192° @ 30 kt
0–1 km EHI0.2
Composite Parameters
Sig. Tornado0.1
STP (eff)0.0
Supercell0.0
K-Index32.6
Thermo & Levels
PWAT1.82 in
0–3 km LR6.0 °C/km
700–500 LR6.6 °C/km
Total Totals49.8
LCL919 hPa
LFC803 hPa
EL143 hPa
Freezing Lvl15,230 ft