Heat Advisory — Greene, IL, Macoupin, IL, Montgomery, IL, Fayette, IL, Calhoun, IL, Jersey, IL, Boone, MO, Callaway, MO, Montgomery, MO, Lincoln, MO 8:00 PM

Macoupin County, Illinois, United States

Last updated: 7:39 AM CDT  ·  Refresh
23°C
Feels like 25°
Partly Cloudy
▲ 33°  /  ▼ 22°
Wind
6 mph ENE
Humidity
93%
Dew Point
22°
Pressure
29.52 inHg
Visibility
9 mi
UV Index
2.4
Cloud Cover
44%
Sunrise
6:43 AM
Sunset
7:03 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Macoupin County is currently partly cloudy at 23°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 2163 J/kg) — isolated convective development possible. Sunrise: 6:43AM · Sunset: 7:03PM.

Alerts

Heat Advisory
Greene, IL, Macoupin, IL, Montgomery, IL, Fayette, IL, Calhoun, IL, Jersey, IL, Boone, MO, Callaway, MO, Montgomery, MO, Lincoln, MO
Expires 8:00 PM
46 AQI · Good Dominant: O3 Air Quality
Hourly Forecast · Next 24 Hours
Now
23°
12%
8 AM
23°
29%
9 AM
24°
29%
10 AM
27°
21%
11 AM
28°
21%
12 PM
31°
15%
1 PM
33°
28%
2 PM
33°
33%
3 PM
33°
33%
4 PM
32°
44%
5 PM
33°
44%
6 PM
31°
44%
7 PM
29°
44%
8 PM
28°
45%
9 PM
26°
41%
10 PM
24°
34%
11 PM
24°
35%
12 AM
24°
27%
1 AM
23°
22%
2 AM
23°
22%
3 AM
23°
22%
4 AM
23°
13%
5 AM
22°
14%
6 AM
22°
11%
7-Day Forecast
Today
33° 22°
Partly Cloudy with a 44% chance of rain.
Sat
35° 22°
Mostly Cloudy with a 22% chance of rain.
Sun
34° 19°
Overcast with a 79% chance of rain.
Mon
26° 16°
Partly Cloudy with a 76% chance of rain.
Tue
22° 13°
Mostly Cloudy with a 34% chance of rain.
Wed
25° 13°
Mostly Cloudy.
Thu
24° 12°
Overcast.
TimeTempConditionsPrecipWindHumidity
Now 23° Partly Cloudy 12% 6 mph ENE 93%
8 AM 23° Partly Cloudy 29% 7 mph ENE 86%
9 AM 24° Partly Cloudy 29% 7 mph E 80%
10 AM 27° Partly Cloudy 21% 6 mph E 73%
11 AM 28° Mostly Clear 21% 5 mph E 66%
12 PM 31° Clear 15% 4 mph E 60%
1 PM 33° Clear 28% 4 mph ESE 58%
2 PM 33° Mostly Clear 33% 5 mph ESE 57%
3 PM 33° Partly Cloudy 33% 6 mph SE 58%
4 PM 32° Partly Cloudy 44% 5 mph E 61%
5 PM 33° Partly Cloudy 44% 6 mph NE 66%
6 PM 31° Partly Cloudy 44% 9 mph NE 72%
7 PM 29° Rain 44% 8 mph NE 77%
8 PM 28° Drizzle 45% 6 mph E 80%
9 PM 26° Partly Cloudy 41% 7 mph ESE 84%
10 PM 24° Partly Cloudy 34% 8 mph ESE 88%
11 PM 24° Mostly Clear 35% 8 mph SE 89%
12 AM 24° Mostly Clear 27% 8 mph SE 90%
1 AM 23° Mostly Clear 22% 7 mph SE 91%
2 AM 23° Partly Cloudy 22% 7 mph SE 91%
3 AM 23° Partly Cloudy 22% 7 mph SSE 91%
4 AM 23° Partly Cloudy 13% 7 mph SSE 91%
5 AM 22° Partly Cloudy 14% 7 mph SSE 92%
6 AM 22° Partly Cloudy 11% 7 mph SSE 92%
15-Day Forecast
Today
9/18
Partly Cloudy
44%
22°
33°
Sat
9/19
Mostly Cloudy
22%
22°
35°
Sun
9/20
Overcast
79%
19°
34°
Mon
9/21
Partly Cloudy
76%
16°
26°
Tue
9/22
Mostly Cloudy
34%
13°
22°
Wed
9/23
Mostly Cloudy
5%
13°
25°
Thu
9/24
Overcast
8%
12°
24°
Fri
9/25
Overcast
40%
13°
23°
Sat
9/26
Partly Cloudy
27%
13°
24°
Sun
9/27
Drizzle
54%
13°
25°
Mon
9/28
Drizzle
60%
14°
28°
Tue
9/29
Drizzle
60%
15°
28°
Wed
9/30
Drizzle
60%
15°
29°
Thu
10/1
Drizzle
60%
15°
28°
Fri
10/2
Drizzle
60%
13°
26°
46
Good
U.S. Air Quality Index · Dominant: O3
50 100 150 200

Air quality is satisfactory and poses little or no health risk.

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
44 AQI 7.9 µg/m³
O3
Ground-level ozone
Dominant
46 AQI 50 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Sat 46 Good 46 44
Sun 51 Moderate 44 51
Mon 44 Good 44 38
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 Fri Sep 18, 11:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE319 J/kg
MLCAPE406 J/kg
MUCAPE798 J/kg
SBCIN-351 J/kg
MLCIN-265 J/kg
Lifted Index-1.6
Kinematics
0–6 km Shear19 kt
0–1 km Shear17 kt
Eff. Shear6 kt
0–1 km SRH61
0–3 km SRH34
Eff. SRH1
Storm Motion329° @ 18 kt
0–1 km EHI0.1
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index41.6
Thermo & Levels
PWAT1.81 in
0–3 km LR4.6 °C/km
700–500 LR5.6 °C/km
Total Totals49.6
LCL985 hPa
LFC714 hPa
EL266 hPa
Freezing Lvl14,741 ft