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

Washington County, Missouri, United States

Last updated: 3:48 AM CDT  ·  Refresh
24°C
Feels like 27°
Mostly Clear
▲ 33°  /  ▼ 22°
Wind
4 mph WSW
Humidity
86%
Dew Point
22°
Pressure
28.93 inHg
Visibility
9 mi
UV Index
0.0
Cloud Cover
11%
Sunrise
5:56 AM
Sunset
8:23 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Washington County is currently mostly clear at 24°C. Precipitation is likely — peak probability 68% around 5 PM. Atmospheric instability is elevated (CAPE up to 2419 J/kg) — isolated convective development possible. Sunrise: 5:56AM · Sunset: 8:23PM.

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
51 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
24°
8%
4 AM
23°
15%
5 AM
22°
15%
6 AM
22°
15%
7 AM
23°
27%
8 AM
25°
30%
9 AM
28°
36%
10 AM
29°
46%
11 AM
29°
49%
12 PM
30°
47%
1 PM
32°
55%
2 PM
31°
64%
3 PM
30°
64%
4 PM
29°
65%
5 PM
28°
67%
6 PM
28°
51%
7 PM
27°
43%
8 PM
26°
30%
9 PM
24°
22%
10 PM
24°
12%
11 PM
23°
12%
12 AM
23°
12%
1 AM
23°
19%
2 AM
23°
39%
7-Day Forecast
Today
33° 22°
Partly Cloudy with a 64% chance of rain.
Mon
36° 22°
Fog with a 44% chance of rain.
Tue
39° 21°
Mostly Clear with a 28% chance of rain.
Wed
30° 16°
Mostly Clear with a 33% chance of rain.
Thu
31° 15°
Clear with a 51% chance of rain.
Fri
33° 16°
Heavy Rain, 82% chance.
Sat
32° 16°
Drizzle, 82% chance.
TimeTempConditionsPrecipWindHumidity
Now 24° Mostly Clear 8% 4 mph WSW 86%
4 AM 23° Partly Cloudy 15% 5 mph WSW 86%
5 AM 22° Partly Cloudy 15% 4 mph WSW 88%
6 AM 22° Partly Cloudy 15% 4 mph WSW 88%
7 AM 23° Mostly Clear 27% 5 mph W 84%
8 AM 25° Mostly Clear 30% 5 mph W 78%
9 AM 28° Clear 36% 5 mph WNW 74%
10 AM 29° Mostly Clear 46% 5 mph WNW 71%
11 AM 29° Partly Cloudy 49% 4 mph W 69%
12 PM 30° Mostly Cloudy 47% 4 mph W 68%
1 PM 32° Mostly Cloudy 55% 4 mph WNW 70%
2 PM 31° Mostly Cloudy 64% 4 mph NW 75%
3 PM 30° Mostly Cloudy 64% 5 mph NW 81%
4 PM 29° Overcast 65% 5 mph NNW 85%
5 PM 28° Mostly Cloudy 67% 4 mph N 88%
6 PM 28° Rain 51% 3 mph NNE 90%
7 PM 27° Mostly Cloudy 43% 3 mph NE 92%
8 PM 26° Partly Cloudy 30% 2 mph ENE 94%
9 PM 24° Partly Cloudy 22% 2 mph ESE 95%
10 PM 24° Partly Cloudy 12% 2 mph ESE 96%
11 PM 23° Partly Cloudy 12% 2 mph E 97%
12 AM 23° Haze 12% 2 mph E 97%
1 AM 23° Fog 19% 2 mph E 97%
2 AM 23° Fog 39% 1 mph ESE 97%
15-Day Forecast
Today
7/19
Partly Cloudy
64%
22°
33°
Mon
7/20
Fog
44%
22°
36°
Tue
7/21
Mostly Clear
28%
21°
39°
Wed
7/22
Mostly Clear
33%
16°
30°
Thu
7/23
Clear
51%
15°
31°
Fri
7/24
Heavy Rain
82%
16°
33°
Sat
7/25
Drizzle
82%
16°
32°
Sun
7/26
Clear
18%
17°
36°
Mon
7/27
Clear
44%
18°
38°
Tue
7/28
Clear
44%
22°
38°
Wed
7/29
Drizzle
60%
21°
36°
Thu
7/30
Clear
60%
21°
37°
Fri
7/31
Drizzle
60%
21°
38°
Sat
8/1
Drizzle
60%
22°
37°
Sun
8/2
Clear
60%
21°
37°
51
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
51 AQI 9.1 µg/m³
O3
Ground-level ozone
26 AQI 29 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 51 Moderate 26 51
Mon 52 Moderate 36 52
Tue 52 Moderate 30 52
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
SBCAPE370 J/kg
MLCAPE653 J/kg
MUCAPE913 J/kg
SBCIN-157 J/kg
MLCIN0 J/kg
Lifted Index-1.4
Kinematics
0–6 km Shear10 kt
0–1 km Shear15 kt
Eff. Shear10 kt
0–1 km SRH14
0–3 km SRH16
Eff. SRH16
Storm Motion294° @ 25 kt
0–1 km EHI0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.1
K-Index35.9
Thermo & Levels
PWAT1.81 in
0–3 km LR4.9 °C/km
700–500 LR5.3 °C/km
Total Totals44.1
LCL950 hPa
LFC785 hPa
EL240 hPa
Freezing Lvl15,322 ft