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

Jersey County, Illinois, United States

Last updated: 5:12 AM CDT  ·  Refresh
25°C
Feels like 27°
Mostly Clear
▲ 35°  /  ▼ 24°
Wind
7 mph SSW
Humidity
80%
Dew Point
22°
Pressure
29.33 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
25%
Sunrise
6:11 AM
Sunset
8:01 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Jersey County is currently mostly clear at 25°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 3180 J/kg) — isolated convective development possible. Sunrise: 6:11AM · 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
36 AQI · Good Dominant: O3 Air Quality
Hourly Forecast · Next 24 Hours
Now
25°
8%
6 AM
23°
23%
7 AM
24°
23%
8 AM
26°
25%
9 AM
27°
25%
10 AM
29°
23%
11 AM
30°
23%
12 PM
32°
18%
1 PM
34°
6%
2 PM
34°
8%
3 PM
34°
9%
4 PM
34°
17%
5 PM
34°
20%
6 PM
33°
18%
7 PM
32°
16%
8 PM
31°
22%
9 PM
29°
22%
10 PM
28°
22%
11 PM
28°
22%
12 AM
26°
23%
1 AM
26°
23%
2 AM
26°
24%
3 AM
26°
24%
4 AM
24°
26%
7-Day Forecast
Today
35° 24°
Partly Cloudy with a 25% chance of rain.
Wed
34° 24°
Partly Cloudy with a 58% chance of rain.
Thu
33° 23°
Partly Cloudy with a 56% chance of rain.
Fri
31° 22°
Partly Cloudy with a 42% chance of rain.
Sat
36° 22°
Partly Cloudy.
Sun
36° 21°
Partly Cloudy with a 47% chance of rain.
Mon
31° 20°
Mostly Clear with a 47% chance of rain.
TimeTempConditionsPrecipWindHumidity
Now 25° Mostly Clear 8% 7 mph SSW 80%
6 AM 23° Partly Cloudy 23% 7 mph SSW 78%
7 AM 24° Partly Cloudy 23% 8 mph SSW 78%
8 AM 26° Partly Cloudy 25% 9 mph SW 73%
9 AM 27° Partly Cloudy 25% 11 mph SW 67%
10 AM 29° Partly Cloudy 23% 12 mph SW 62%
11 AM 30° Partly Cloudy 23% 12 mph SW 59%
12 PM 32° Partly Cloudy 18% 12 mph SW 55%
1 PM 34° Partly Cloudy 6% 12 mph SW 51%
2 PM 34° Mostly Clear 8% 12 mph SW 49%
3 PM 34° Mostly Clear 9% 12 mph SW 48%
4 PM 34° Partly Cloudy 17% 11 mph SW 49%
5 PM 34° Partly Cloudy 20% 10 mph SW 52%
6 PM 33° Partly Cloudy 18% 8 mph SW 56%
7 PM 32° Partly Cloudy 16% 7 mph SW 60%
8 PM 31° Mostly Cloudy 22% 6 mph SSW 62%
9 PM 29° Partly Cloudy 22% 6 mph SSW 63%
10 PM 28° Partly Cloudy 22% 6 mph SSW 65%
11 PM 28° Partly Cloudy 22% 6 mph SSW 68%
12 AM 26° Partly Cloudy 23% 6 mph SSW 71%
1 AM 26° Mostly Clear 23% 6 mph SSW 74%
2 AM 26° Mostly Clear 24% 6 mph SSW 75%
3 AM 26° Mostly Clear 24% 6 mph SSW 76%
4 AM 24° Clear 26% 6 mph SSW 78%
15-Day Forecast
Today
8/11
Partly Cloudy
25%
24°
35°
Wed
8/12
Partly Cloudy
58%
24°
34°
Thu
8/13
Partly Cloudy
56%
23°
33°
Fri
8/14
Partly Cloudy
42%
22°
31°
Sat
8/15
Partly Cloudy
15%
22°
36°
Sun
8/16
Partly Cloudy
47%
21°
36°
Mon
8/17
Mostly Clear
47%
20°
31°
Tue
8/18
Clear
34%
20°
34°
Wed
8/19
Mostly Cloudy
35%
23°
36°
Thu
8/20
Clear
35%
22°
37°
Fri
8/21
Clear
60%
20°
37°
Sat
8/22
Drizzle
60%
20°
34°
Sun
8/23
Clear
60%
20°
33°
Mon
8/24
Drizzle
60%
19°
31°
Tue
8/25
Drizzle
60%
19°
32°
36
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
36 AQI 6.5 µg/m³
O3
Ground-level ozone
Dominant
36 AQI 39 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 36 Good 36 36
Wed 37 Good 37 21
Thu 34 Good 34 28
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
SBCAPE1716 J/kg
MLCAPE1630 J/kg
MUCAPE1768 J/kg
SBCIN-532 J/kg
MLCIN0 J/kg
Lifted Index-6.2
Kinematics
0–6 km Shear18 kt
0–1 km Shear21 kt
Eff. Shear9 kt
0–1 km SRH155
0–3 km SRH135
Eff. SRH-5
Storm Motion314° @ 18 kt
0–1 km EHI1.7
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index24.9
Thermo & Levels
PWAT1.44 in
0–3 km LR4.0 °C/km
700–500 LR8.1 °C/km
Total Totals52.6
LCL956 hPa
LFC655 hPa
EL181 hPa
Freezing Lvl14,626 ft