Heat Advisory — 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, Crawford, MO, Washington, MO, St. Francois, MO, Ste. Genevieve, MO, Iron, MO, Madison, MO, Reynolds, MO 7:00 PM

Boone County, Missouri, United States

Last updated: 3:47 AM CDT  ·  Refresh
24°C
Feels like 28°
Mostly Cloudy
▲ 32°  /  ▼ 22°
Wind
2 mph NNW
Humidity
94%
Dew Point
23°
Pressure
29.15 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
61%
Sunrise
5:59 AM
Sunset
8:31 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Boone County is currently mostly cloudy at 24°C. Precipitation is likely — peak probability 77% around 3 PM. Atmospheric instability is elevated (CAPE up to 2156 J/kg) — isolated convective development possible. Sunrise: 5:59AM · Sunset: 8:31PM.

Alerts

Heat Advisory
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, Crawford, MO, Washington, MO, St. Francois, MO, Ste. Genevieve, MO, Iron, MO, Madison, MO, Reynolds, MO
Expires 7:00 PM
55 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
24°
32%
4 AM
24°
15%
5 AM
22°
19%
6 AM
23°
23%
7 AM
24°
35%
8 AM
26°
37%
9 AM
28°
44%
10 AM
29°
54%
11 AM
30°
50%
12 PM
31°
58%
1 PM
32°
67%
2 PM
32°
77%
3 PM
31°
77%
4 PM
31°
70%
5 PM
30°
50%
6 PM
29°
34%
7 PM
29°
21%
8 PM
28°
21%
9 PM
27°
22%
10 PM
26°
13%
11 PM
26°
9%
12 AM
25°
7%
1 AM
24°
7%
2 AM
24°
7%
7-Day Forecast
Today
32° 22°
Mostly Clear with a 77% chance of rain.
Mon
34° 22°
Mostly Clear.
Tue
34° 20°
Clear.
Wed
27° 17°
Clear with a 56% chance of rain.
Thu
28° 16°
Clear with a 70% chance of rain.
Fri
30° 18°
Heavy Rain, 90% chance.
Sat
29° 16°
Clear with a 63% chance of rain.
TimeTempConditionsPrecipWindHumidity
Now 24° Mostly Cloudy 32% 2 mph NNW 94%
4 AM 24° Mostly Clear 15% 2 mph N 94%
5 AM 22° Mostly Clear 19% 1 mph WSW 93%
6 AM 23° Mostly Clear 23% 2 mph SW 92%
7 AM 24° Clear 35% 2 mph WNW 88%
8 AM 26° Clear 37% 2 mph N 83%
9 AM 28° Clear 44% 3 mph N 78%
10 AM 29° Clear 54% 4 mph N 74%
11 AM 30° Mostly Clear 50% 4 mph N 70%
12 PM 31° Mostly Clear 58% 4 mph N 66%
1 PM 32° Mostly Clear 67% 4 mph N 68%
2 PM 32° Partly Cloudy 77% 5 mph NNE 70%
3 PM 31° Partly Cloudy 77% 5 mph NE 72%
4 PM 31° Partly Cloudy 70% 5 mph ENE 75%
5 PM 30° Partly Cloudy 50% 6 mph ENE 77%
6 PM 29° Partly Cloudy 34% 6 mph ENE 80%
7 PM 29° Partly Cloudy 21% 6 mph ENE 83%
8 PM 28° Partly Cloudy 21% 5 mph ENE 86%
9 PM 27° Partly Cloudy 22% 4 mph E 88%
10 PM 26° Partly Cloudy 13% 4 mph E 90%
11 PM 26° Partly Cloudy 9% 4 mph E 92%
12 AM 25° Partly Cloudy 7% 4 mph E 93%
1 AM 24° Mostly Clear 7% 4 mph E 93%
2 AM 24° Mostly Clear 7% 4 mph ESE 94%
15-Day Forecast
Today
7/19
Mostly Clear
77%
22°
32°
Mon
7/20
Mostly Clear
16%
22°
34°
Tue
7/21
Clear
10%
20°
34°
Wed
7/22
Clear
56%
17°
27°
Thu
7/23
Clear
70%
16°
28°
Fri
7/24
Heavy Rain
90%
18°
30°
Sat
7/25
Clear
63%
16°
29°
Sun
7/26
Clear
18%
19°
33°
Mon
7/27
Rain
44%
20°
36°
Tue
7/28
Clear
44%
22°
36°
Wed
7/29
Drizzle
60%
21°
36°
Thu
7/30
Drizzle
60%
21°
34°
Fri
7/31
Drizzle
60%
22°
36°
Sat
8/1
Clear
60%
22°
36°
Sun
8/2
Clear
60%
22°
35°
55
Moderate
U.S. Air Quality Index · Dominant: PM2.5
50 100 150 200

Air quality is acceptable. Unusually sensitive people should consider limiting prolonged outdoor exertion.

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
Dominant
55 AQI 11.2 µg/m³
O3
Ground-level ozone
27 AQI 29 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 55 Moderate 27 55
Mon 55 Moderate 37 55
Tue 57 Moderate 32 57
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 Sun Jul 19, 07:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE851 J/kg
MLCAPE1210 J/kg
MUCAPE1458 J/kg
SBCIN-113 J/kg
MLCIN0 J/kg
Lifted Index-2.4
Kinematics
0–6 km Shear6 kt
0–1 km Shear10 kt
Eff. Shear9 kt
0–1 km SRH-14
0–3 km SRH-18
Eff. SRH-18
Storm Motion277° @ 19 kt
0–1 km EHI-0.1
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index36.7
Thermo & Levels
PWAT2.12 in
0–3 km LR4.7 °C/km
700–500 LR5.4 °C/km
Total Totals46.0
LCL970 hPa
LFC804 hPa
EL210 hPa
Freezing Lvl15,968 ft