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: 6:04 AM CDT  ·  Refresh
24°C
Feels like 27°
Mostly Clear
▲ 35°  /  ▼ 24°
Wind
6 mph SSW
Humidity
81%
Dew Point
22°
Pressure
29.33 inHg
Visibility
9 mi
UV Index
0.0
Cloud Cover
28%
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 3230 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
24°
6%
7 AM
24°
21%
8 AM
26°
25%
9 AM
27°
25%
10 AM
29°
23%
11 AM
30°
23%
12 PM
31°
18%
1 PM
34°
6%
2 PM
34°
8%
3 PM
34°
8%
4 PM
34°
16%
5 PM
34°
20%
6 PM
33°
17%
7 PM
32°
16%
8 PM
31°
21%
9 PM
29°
22%
10 PM
28°
22%
11 PM
27°
22%
12 AM
27°
22%
1 AM
26°
23%
2 AM
26°
23%
3 AM
26°
24%
4 AM
25°
24%
5 AM
24°
26%
7-Day Forecast
Today
35° 24°
Partly Cloudy with a 25% chance of rain.
Wed
34° 24°
Partly Cloudy with a 52% chance of rain.
Thu
33° 23°
Partly Cloudy with a 41% chance of rain.
Fri
31° 21°
Partly Cloudy with a 69% chance of rain.
Sat
37° 22°
Partly Cloudy.
Sun
36° 21°
Partly Cloudy with a 38% chance of rain.
Mon
31° 20°
Mostly Clear with a 47% chance of rain.
TimeTempConditionsPrecipWindHumidity
Now 24° Mostly Clear 6% 6 mph SSW 81%
7 AM 24° Partly Cloudy 21% 7 mph SSW 78%
8 AM 26° Partly Cloudy 25% 9 mph SW 73%
9 AM 27° Mostly Cloudy 25% 10 mph SW 68%
10 AM 29° Partly Cloudy 23% 11 mph SW 63%
11 AM 30° Mostly Cloudy 23% 12 mph SW 59%
12 PM 31° Partly Cloudy 18% 12 mph SW 55%
1 PM 34° Partly Cloudy 6% 12 mph SW 51%
2 PM 34° Partly Cloudy 8% 12 mph SW 49%
3 PM 34° Mostly Clear 8% 12 mph SW 48%
4 PM 34° Partly Cloudy 16% 11 mph SW 48%
5 PM 34° Partly Cloudy 20% 10 mph SW 51%
6 PM 33° Partly Cloudy 17% 9 mph SW 55%
7 PM 32° Partly Cloudy 16% 7 mph SSW 59%
8 PM 31° Mostly Cloudy 21% 7 mph SSW 61%
9 PM 29° Partly Cloudy 22% 6 mph SSW 63%
10 PM 28° Partly Cloudy 22% 6 mph SSW 64%
11 PM 27° Partly Cloudy 22% 6 mph SSW 68%
12 AM 27° Partly Cloudy 22% 6 mph SSW 71%
1 AM 26° Mostly Clear 23% 7 mph SSW 73%
2 AM 26° Mostly Clear 23% 6 mph SSW 75%
3 AM 26° Mostly Clear 24% 6 mph SSW 76%
4 AM 25° Mostly Clear 24% 6 mph SSW 78%
5 AM 24° Clear 26% 6 mph SSW 78%
15-Day Forecast
Today
8/11
Partly Cloudy
25%
24°
35°
Wed
8/12
Partly Cloudy
52%
24°
34°
Thu
8/13
Partly Cloudy
41%
23°
33°
Fri
8/14
Partly Cloudy
69%
21°
31°
Sat
8/15
Partly Cloudy
15%
22°
37°
Sun
8/16
Partly Cloudy
38%
21°
36°
Mon
8/17
Mostly Clear
47%
20°
31°
Tue
8/18
Clear
34%
20°
35°
Wed
8/19
Mostly Cloudy
35%
23°
36°
Thu
8/20
Mostly Clear
35%
22°
37°
Fri
8/21
Clear
25%
20°
37°
Sat
8/22
Drizzle
60%
20°
34°
Sun
8/23
Clear
60%
20°
34°
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, 09:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE1461 J/kg
MLCAPE1424 J/kg
MUCAPE1515 J/kg
SBCIN-501 J/kg
MLCIN0 J/kg
Lifted Index-6.2
Kinematics
0–6 km Shear21 kt
0–1 km Shear19 kt
Eff. Shear10 kt
0–1 km SRH154
0–3 km SRH145
Eff. SRH-12
Storm Motion310° @ 18 kt
0–1 km EHI1.4
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index28.8
Thermo & Levels
PWAT1.56 in
0–3 km LR3.9 °C/km
700–500 LR8.3 °C/km
Total Totals55.3
LCL955 hPa
LFC655 hPa
EL188 hPa
Freezing Lvl14,472 ft