Heat Advisory — Knox, IL, Stark, IL, Peoria, IL, Fulton, IL, Tazewell, IL, Schuyler, IL, Mason, IL, Logan, IL, De Witt, IL, Piatt, IL, Cass, IL, Menard, IL, Scott, IL, Morgan, IL, Sangamon, IL, Christian, IL, Macon, IL, Moultrie, IL, Douglas, IL, Coles, IL, Shelby, IL, Cumberland, IL, Clark, IL, Effingham, IL, Jasper, IL, Crawford, IL, Clay, IL, Richland, IL, Lawrence, IL, Marshall, IL, Woodford, IL, McLean, IL, Champaign, IL, Vermilion, IL, Edgar, IL 7:00 PM

Cass County, Illinois, United States

Last updated: 11:45 PM CDT  ·  Refresh
27°C
Feels like 27°
Clear
▲ 33°  /  ▼ 21°
Wind
7 mph SSW
Humidity
64%
Dew Point
20°
Pressure
29.32 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
0%
Sunrise
6:28 AM
Sunset
7:33 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Cass County is currently clear at 26°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 1394 J/kg) — isolated convective development possible. Sunrise: 6:28AM · Sunset: 7:33PM.

Alerts

Heat Advisory
Knox, IL, Stark, IL, Peoria, IL, Fulton, IL, Tazewell, IL, Schuyler, IL, Mason, IL, Logan, IL, De Witt, IL, Piatt, IL, Cass, IL, Menard, IL, Scott, IL, Morgan, IL, Sangamon, IL, Christian, IL, Macon, IL, Moultrie, IL, Douglas, IL, Coles, IL, Shelby, IL, Cumberland, IL, Clark, IL, Effingham, IL, Jasper, IL, Crawford, IL, Clay, IL, Richland, IL, Lawrence, IL, Marshall, IL, Woodford, IL, McLean, IL, Champaign, IL, Vermilion, IL, Edgar, IL
Expires 7:00 PM
57 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
27°
3%
12 AM
26°
3%
1 AM
26°
3%
2 AM
25°
3%
3 AM
24°
3%
4 AM
24°
3%
5 AM
22°
3%
6 AM
22°
3%
7 AM
23°
3%
8 AM
26°
3%
9 AM
29°
3%
10 AM
31°
3%
11 AM
33°
3%
12 PM
34°
3%
1 PM
37°
3%
2 PM
37°
3%
3 PM
37°
3%
4 PM
37°
3%
5 PM
37°
3%
6 PM
35°
3%
7 PM
34°
3%
8 PM
33°
3%
9 PM
31°
3%
10 PM
30°
3%
7-Day Forecast
Tonight
33° 21°
Clear.
Tue
38° 22°
Mostly Clear.
Wed
40° 22°
Mostly Clear.
Thu
39° 21°
Partly Cloudy.
Fri
41° 23°
Clear.
Sat
41° 24°
Clear.
Sun
39° 19°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 27° Clear 3% 7 mph SSW 64%
12 AM 26° Clear 3% 8 mph SSW 59%
1 AM 26° Clear 3% 9 mph SSW 62%
2 AM 25° Clear 3% 9 mph SSW 65%
3 AM 24° Clear 3% 9 mph SSW 67%
4 AM 24° Clear 3% 8 mph SSW 69%
5 AM 22° Clear 3% 8 mph SSW 71%
6 AM 22° Clear 3% 8 mph SW 72%
7 AM 23° Clear 3% 8 mph SW 67%
8 AM 26° Mostly Clear 3% 9 mph WSW 59%
9 AM 29° Partly Cloudy 3% 10 mph WSW 51%
10 AM 31° Mostly Clear 3% 10 mph WSW 47%
11 AM 33° Mostly Clear 3% 9 mph WSW 42%
12 PM 34° Mostly Clear 3% 8 mph WSW 38%
1 PM 37° Clear 3% 8 mph WSW 35%
2 PM 37° Clear 3% 8 mph WSW 32%
3 PM 37° Clear 3% 8 mph SW 30%
4 PM 37° Clear 3% 8 mph SW 33%
5 PM 37° Clear 3% 7 mph SSW 38%
6 PM 35° Clear 3% 7 mph SSW 42%
7 PM 34° Clear 3% 7 mph SSW 46%
8 PM 33° Clear 3% 8 mph SSW 50%
9 PM 31° Clear 3% 8 mph SSW 54%
10 PM 30° Clear 3% 8 mph SSW 57%
15-Day Forecast
Today
8/31
Clear
3%
21°
33°
Tue
9/1
Mostly Clear
3%
22°
38°
Wed
9/2
Mostly Clear
7%
22°
40°
Thu
9/3
Partly Cloudy
8%
21°
39°
Fri
9/4
Clear
19%
23°
41°
Sat
9/5
Clear
19%
24°
41°
Sun
9/6
Clear
19%
19°
39°
Mon
9/7
Clear
19%
17°
38°
Tue
9/8
Drizzle
60%
19°
39°
Wed
9/9
Drizzle
60%
19°
39°
Thu
9/10
Drizzle
60%
18°
36°
Fri
9/11
Drizzle
60%
20°
34°
Sat
9/12
Drizzle
60%
17°
33°
Sun
9/13
Drizzle
60%
17°
32°
Mon
9/14
Drizzle
60%
17°
31°
57
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
57 AQI 12.3 µg/m³
O3
Ground-level ozone
47 AQI 51 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 57 Moderate 47 57
Wed 58 Moderate 50 58
Thu 42 Good 39 42
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 Sep 1, 03:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE112 J/kg
MLCAPE109 J/kg
MUCAPE403 J/kg
SBCIN-724 J/kg
MLCIN-435 J/kg
Lifted Index-0.8
Kinematics
0–6 km Shear19 kt
0–1 km Shear19 kt
Eff. Shear24 kt
0–1 km SRH143
0–3 km SRH131
Eff. SRH41
Storm Motion320° @ 14 kt
0–1 km EHI0.1
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.2
K-Index35.0
Thermo & Levels
PWAT1.63 in
0–3 km LR4.5 °C/km
700–500 LR6.9 °C/km
Total Totals47.1
LCL901 hPa
LFC445 hPa
EL250 hPa
Freezing Lvl15,633 ft