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

Brown County, Illinois, United States

Last updated: 6:04 AM CDT  ·  Refresh
24°C
Feels like 26°
Partly Cloudy
▲ 34°  /  ▼ 23°
Wind
7 mph SSW
Humidity
76%
Dew Point
21°
Pressure
29.23 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
31%
Sunrise
6:11 AM
Sunset
8:04 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Brown County is currently partly cloudy at 25°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 3499 J/kg) — isolated convective development possible. Sunrise: 6:11AM · Sunset: 8:04PM.

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
44 AQI · Good Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
24°
9%
7 AM
23°
25%
8 AM
26°
23%
9 AM
26°
23%
10 AM
28°
33%
11 AM
29°
37%
12 PM
30°
25%
1 PM
32°
4%
2 PM
33°
12%
3 PM
33°
19%
4 PM
33°
27%
5 PM
34°
28%
6 PM
33°
28%
7 PM
32°
29%
8 PM
30°
29%
9 PM
28°
30%
10 PM
27°
22%
11 PM
26°
14%
12 AM
26°
17%
1 AM
25°
11%
2 AM
25°
12%
3 AM
25°
9%
4 AM
24°
18%
5 AM
23°
20%
7-Day Forecast
Today
34° 23°
Partly Cloudy with a 30% chance of rain.
Wed
33° 23°
Partly Cloudy with a 70% chance of rain.
Thu
32° 22°
Partly Cloudy with a 64% chance of rain.
Fri
29° 20°
Overcast with a 83% chance of rain.
Sat
37° 22°
Mostly Clear.
Sun
32° 19°
Drizzle, 62% chance.
Mon
31° 18°
Clear with a 66% chance of rain.
TimeTempConditionsPrecipWindHumidity
Now 24° Partly Cloudy 9% 7 mph SSW 76%
7 AM 23° Partly Cloudy 25% 8 mph SW 72%
8 AM 26° Partly Cloudy 23% 10 mph SW 67%
9 AM 26° Partly Cloudy 23% 12 mph SW 63%
10 AM 28° Partly Cloudy 33% 13 mph WSW 59%
11 AM 29° Partly Cloudy 37% 13 mph WSW 57%
12 PM 30° Partly Cloudy 25% 14 mph SW 53%
1 PM 32° Partly Cloudy 4% 14 mph WSW 49%
2 PM 33° Partly Cloudy 12% 14 mph WSW 48%
3 PM 33° Mostly Cloudy 19% 14 mph WSW 48%
4 PM 33° Partly Cloudy 27% 13 mph SW 47%
5 PM 34° Partly Cloudy 28% 12 mph SW 50%
6 PM 33° Partly Cloudy 28% 10 mph SW 53%
7 PM 32° Partly Cloudy 29% 8 mph SW 57%
8 PM 30° Partly Cloudy 29% 6 mph SW 65%
9 PM 28° Partly Cloudy 30% 6 mph SSW 72%
10 PM 27° Partly Cloudy 22% 6 mph S 79%
11 PM 26° Partly Cloudy 14% 5 mph S 80%
12 AM 26° Partly Cloudy 17% 6 mph S 81%
1 AM 25° Partly Cloudy 11% 6 mph S 82%
2 AM 25° Partly Cloudy 12% 5 mph S 82%
3 AM 25° Partly Cloudy 9% 4 mph S 83%
4 AM 24° Partly Cloudy 18% 5 mph S 83%
5 AM 23° Mostly Clear 20% 4 mph SSE 84%
15-Day Forecast
Today
8/11
Partly Cloudy
30%
23°
34°
Wed
8/12
Partly Cloudy
70%
23°
33°
Thu
8/13
Partly Cloudy
64%
22°
32°
Fri
8/14
Overcast
83%
20°
29°
Sat
8/15
Mostly Clear
17%
22°
37°
Sun
8/16
Drizzle
62%
19°
32°
Mon
8/17
Clear
66%
18°
31°
Tue
8/18
Clear
34%
19°
35°
Wed
8/19
Overcast
35%
21°
36°
Thu
8/20
Mostly Clear
35%
22°
40°
Fri
8/21
Drizzle
60%
19°
40°
Sat
8/22
Drizzle
60%
19°
34°
Sun
8/23
Drizzle
60%
19°
33°
Mon
8/24
Drizzle
60%
18°
31°
Tue
8/25
Drizzle
60%
18°
31°
44
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
44 AQI 7.9 µg/m³
O3
Ground-level ozone
37 AQI 41 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 44 Good 37 44
Wed 36 Good 36 24
Thu 37 Good 37 32
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, 09:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 50 60 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE1280 J/kg
MLCAPE1626 J/kg
MUCAPE1839 J/kg
SBCIN-561 J/kg
MLCIN0 J/kg
Lifted Index-4.9
Kinematics
0–6 km Shear16 kt
0–1 km Shear23 kt
Eff. Shear9 kt
0–1 km SRH169
0–3 km SRH148
Eff. SRH-5
Storm Motion312° @ 19 kt
0–1 km EHI1.4
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index33.4
Thermo & Levels
PWAT1.54 in
0–3 km LR4.3 °C/km
700–500 LR7.7 °C/km
Total Totals52.8
LCL940 hPa
LFC655 hPa
EL196 hPa
Freezing Lvl14,370 ft