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

Washington County, Missouri, United States

Last updated: 5:12 AM CDT  ·  Refresh
25°C
Feels like 26°
Clear
▲ 36°  /  ▼ 24°
Wind
7 mph SSW
Humidity
71%
Dew Point
20°
Pressure
28.97 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
8%
Sunrise
6:15 AM
Sunset
8:01 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Washington County is currently clear at 25°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 2511 J/kg) — isolated convective development possible. Sunrise: 6:15AM · Sunset: 8:01PM.

Alerts

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
38 AQI · Good Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
25°
7%
6 AM
23°
15%
7 AM
23°
14%
8 AM
24°
14%
9 AM
27°
14%
10 AM
29°
14%
11 AM
31°
14%
12 PM
32°
7%
1 PM
34°
3%
2 PM
35°
3%
3 PM
36°
3%
4 PM
36°
3%
5 PM
35°
3%
6 PM
34°
3%
7 PM
33°
3%
8 PM
31°
5%
9 PM
29°
8%
10 PM
28°
8%
11 PM
28°
8%
12 AM
27°
8%
1 AM
27°
8%
2 AM
27°
14%
3 AM
27°
24%
4 AM
26°
26%
7-Day Forecast
Today
36° 24°
Mostly Clear.
Wed
38° 25°
Mostly Clear with a 28% chance of rain.
Thu
38° 24°
Mostly Clear with a 28% chance of rain.
Fri
36° 23°
Clear.
Sat
40° 23°
Clear.
Sun
40° 22°
Partly Cloudy with a 31% chance of rain.
Mon
36° 22°
Mostly Cloudy with a 30% chance of rain.
TimeTempConditionsPrecipWindHumidity
Now 25° Clear 7% 7 mph SSW 71%
6 AM 23° Clear 15% 8 mph SW 71%
7 AM 23° Clear 14% 8 mph SW 72%
8 AM 24° Clear 14% 8 mph SW 66%
9 AM 27° Clear 14% 9 mph SW 61%
10 AM 29° Clear 14% 9 mph SW 56%
11 AM 31° Clear 14% 9 mph SW 53%
12 PM 32° Clear 7% 9 mph SW 49%
1 PM 34° Clear 3% 8 mph SW 46%
2 PM 35° Clear 3% 8 mph SW 44%
3 PM 36° Mostly Clear 3% 8 mph SW 43%
4 PM 36° Mostly Clear 3% 8 mph SW 42%
5 PM 35° Mostly Clear 3% 7 mph SW 46%
6 PM 34° Partly Cloudy 3% 6 mph SSW 51%
7 PM 33° Partly Cloudy 3% 6 mph SSW 56%
8 PM 31° Partly Cloudy 5% 6 mph SSW 59%
9 PM 29° Mostly Clear 8% 6 mph SSW 61%
10 PM 28° Mostly Clear 8% 6 mph SSW 63%
11 PM 28° Mostly Clear 8% 6 mph SSW 64%
12 AM 27° Mostly Clear 8% 7 mph SSW 64%
1 AM 27° Mostly Clear 8% 7 mph SSW 65%
2 AM 27° Mostly Clear 14% 7 mph SSW 65%
3 AM 27° Clear 24% 7 mph SSW 65%
4 AM 26° Clear 26% 8 mph SW 65%
15-Day Forecast
Today
8/11
Mostly Clear
14%
24°
36°
Wed
8/12
Mostly Clear
28%
25°
38°
Thu
8/13
Mostly Clear
28%
24°
38°
Fri
8/14
Clear
15%
23°
36°
Sat
8/15
Clear
15%
23°
40°
Sun
8/16
Partly Cloudy
31%
22°
40°
Mon
8/17
Mostly Cloudy
30%
22°
36°
Tue
8/18
Clear
35%
19°
39°
Wed
8/19
Mostly Clear
35%
22°
40°
Thu
8/20
Mostly Clear
32%
23°
39°
Fri
8/21
Clear
60%
21°
37°
Sat
8/22
Drizzle
60%
21°
37°
Sun
8/23
Clear
60%
21°
37°
Mon
8/24
Drizzle
60%
20°
34°
Tue
8/25
Drizzle
60%
19°
34°
38
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
38 AQI 6.8 µg/m³
O3
Ground-level ozone
35 AQI 38 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 38 Good 35 38
Wed 32 Good 32 18
Thu 31 Good 31 24
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 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE948 J/kg
MLCAPE1314 J/kg
MUCAPE1601 J/kg
SBCIN-535 J/kg
MLCIN0 J/kg
Lifted Index-4.4
Kinematics
0–6 km Shear16 kt
0–1 km Shear18 kt
Eff. Shear17 kt
0–1 km SRH145
0–3 km SRH90
Eff. SRH-40
Storm Motion316° @ 15 kt
0–1 km EHI0.9
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index29.9
Thermo & Levels
PWAT1.55 in
0–3 km LR4.3 °C/km
700–500 LR8.0 °C/km
Total Totals53.4
LCL917 hPa
LFC628 hPa
EL216 hPa
Freezing Lvl14,377 ft