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

Jersey County, Illinois, United States

Last updated: 6:43 AM CDT  ·  Refresh
22°C
Feels like 24°
Mostly Clear
▲ 34°  /  ▼ 22°
Wind
5 mph NE
Humidity
86%
Dew Point
20°
Pressure
29.53 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
14%
Sunrise
6:45 AM
Sunset
7:04 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Jersey County is currently mostly clear at 22°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 1599 J/kg) — isolated convective development possible. Sunrise: 6:45AM · Sunset: 7:04PM.

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
51 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
22°
12%
7 AM
21°
29%
8 AM
23°
29%
9 AM
25°
21%
10 AM
27°
21%
11 AM
29°
23%
12 PM
31°
17%
1 PM
33°
24%
2 PM
34°
29%
3 PM
34°
32%
4 PM
33°
32%
5 PM
32°
32%
6 PM
31°
24%
7 PM
29°
29%
8 PM
27°
20%
9 PM
26°
20%
10 PM
26°
38%
11 PM
25°
38%
12 AM
24°
38%
1 AM
23°
39%
2 AM
23°
37%
3 AM
23°
37%
4 AM
23°
29%
5 AM
22°
29%
7-Day Forecast
Today
34° 22°
Mostly Clear with a 32% chance of rain.
Sat
37° 22°
Mostly Cloudy with a 38% chance of rain.
Sun
34° 20°
Overcast with a 62% chance of rain.
Mon
27° 17°
Mostly Cloudy with a 72% chance of rain.
Tue
23° 13°
Mostly Cloudy with a 34% chance of rain.
Wed
26° 12°
Overcast.
Thu
26° 12°
Overcast.
TimeTempConditionsPrecipWindHumidity
Now 22° Mostly Clear 12% 5 mph NE 86%
7 AM 21° Clear 29% 6 mph ENE 81%
8 AM 23° Mostly Clear 29% 6 mph ENE 78%
9 AM 25° Mostly Clear 21% 6 mph E 76%
10 AM 27° Clear 21% 5 mph E 68%
11 AM 29° Clear 23% 4 mph E 60%
12 PM 31° Clear 17% 4 mph ESE 52%
1 PM 33° Clear 24% 4 mph SE 50%
2 PM 34° Mostly Clear 29% 4 mph SE 50%
3 PM 34° Partly Cloudy 32% 4 mph ESE 51%
4 PM 33° Partly Cloudy 32% 4 mph E 55%
5 PM 32° Mostly Clear 32% 4 mph ENE 60%
6 PM 31° Mostly Clear 24% 6 mph NE 65%
7 PM 29° Mostly Clear 29% 6 mph NE 70%
8 PM 27° Partly Cloudy 20% 5 mph E 75%
9 PM 26° Partly Cloudy 20% 5 mph SE 79%
10 PM 26° Mostly Clear 38% 7 mph SE 82%
11 PM 25° Mostly Clear 38% 8 mph SE 83%
12 AM 24° Clear 38% 8 mph SE 84%
1 AM 23° Clear 39% 8 mph SE 84%
2 AM 23° Mostly Clear 37% 7 mph SE 84%
3 AM 23° Haze 37% 7 mph SE 85%
4 AM 23° Fog 29% 7 mph SSE 85%
5 AM 22° Fog 29% 7 mph SSE 85%
15-Day Forecast
Today
9/18
Mostly Clear
32%
22°
34°
Sat
9/19
Mostly Cloudy
38%
22°
37°
Sun
9/20
Overcast
62%
20°
34°
Mon
9/21
Mostly Cloudy
72%
17°
27°
Tue
9/22
Mostly Cloudy
34%
13°
23°
Wed
9/23
Overcast
3%
12°
26°
Thu
9/24
Overcast
8%
12°
26°
Fri
9/25
Rain
48%
13°
24°
Sat
9/26
Mostly Clear
35%
13°
25°
Sun
9/27
Rain
57%
13°
26°
Mon
9/28
Drizzle
60%
15°
29°
Tue
9/29
Drizzle
60%
16°
29°
Wed
9/30
Drizzle
60%
16°
29°
Thu
10/1
Clear
60%
15°
29°
Fri
10/2
Drizzle
60%
13°
27°
51
Moderate
U.S. Air Quality Index · Dominant: PM2.5
50 100 150 200

Air quality is acceptable. Unusually sensitive people should consider limiting prolonged outdoor exertion.

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
Dominant
51 AQI 9.4 µg/m³
O3
Ground-level ozone
49 AQI 54 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Sat 51 Moderate 49 51
Sun 52 Moderate 44 52
Mon 48 Good 46 48
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, 10:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE12 J/kg
MLCAPE129 J/kg
MUCAPE772 J/kg
SBCIN-525 J/kg
MLCIN-304 J/kg
Lifted Index0.1
Kinematics
0–6 km Shear19 kt
0–1 km Shear14 kt
Eff. Shear9 kt
0–1 km SRH53
0–3 km SRH19
Eff. SRH-11
Storm Motion330° @ 17 kt
0–1 km EHI0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index39.7
Thermo & Levels
PWAT1.71 in
0–3 km LR4.4 °C/km
700–500 LR5.7 °C/km
Total Totals50.1
LCL972 hPa
LFC628 hPa
EL522 hPa
Freezing Lvl14,642 ft