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

Shelby County, Illinois, United States

Last updated: 1:55 AM CDT  ·  Refresh
25°C
Feels like 27°
Clear
▲ 36°  /  ▼ 23°
Wind
5 mph S
Humidity
72%
Dew Point
20°
Pressure
29.34 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
0%
Sunrise
6:25 AM
Sunset
7:22 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Shelby County is currently clear at 25°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 1109 J/kg) — isolated convective development possible. Sunrise: 6:25AM · Sunset: 7:22PM.

Alerts

Extreme Heat Warning
Knox, IL, Stark, IL, Peoria, IL, Marshall, IL, Woodford, IL, Fulton, IL, Tazewell, IL, McLean, IL, Schuyler, IL, Mason, IL, Logan, IL, De Witt, IL, Piatt, IL, Champaign, IL, Vermilion, IL, Cass, IL, Menard, IL, Scott, IL, Morgan, IL, Sangamon, IL, Christian, IL, Macon, IL, Moultrie, IL, Douglas, IL, Coles, IL, Edgar, IL, Shelby, IL, Cumberland, IL, Clark, IL, Effingham, IL, Jasper, IL, Crawford, IL, Clay, IL, Richland, IL, Lawrence, IL
Expires 7:00 PM
Heat Advisory
Knox, IL, Stark, IL, Peoria, IL, Marshall, IL, Woodford, IL, Fulton, IL, Tazewell, IL, McLean, IL, Schuyler, IL, Mason, IL, Logan, IL, De Witt, IL, Piatt, IL, Champaign, IL, Vermilion, IL, Cass, IL, Menard, IL, Scott, IL, Morgan, IL, Sangamon, IL, Christian, IL, Macon, IL, Moultrie, IL, Douglas, IL, Coles, IL, Edgar, IL, Shelby, IL, Cumberland, IL, Clark, IL, Effingham, IL, Jasper, IL, Crawford, IL, Clay, IL, Richland, IL, Lawrence, IL
Expires 7:00 PM
53 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
25°
8%
2 AM
24°
8%
3 AM
24°
3%
4 AM
24°
3%
5 AM
22°
3%
6 AM
22°
3%
7 AM
24°
3%
8 AM
27°
3%
9 AM
30°
3%
10 AM
32°
3%
11 AM
32°
3%
12 PM
34°
3%
1 PM
36°
3%
2 PM
36°
3%
3 PM
36°
3%
4 PM
35°
3%
5 PM
36°
3%
6 PM
34°
3%
7 PM
33°
3%
8 PM
33°
3%
9 PM
28°
3%
10 PM
28°
3%
11 PM
27°
3%
12 AM
27°
3%
7-Day Forecast
Today
36° 23°
Clear.
Fri
40° 23°
Mostly Clear.
Sat
41° 23°
Clear.
Sun
32° 18°
Fog.
Mon
35° 14°
Clear.
Tue
39° 18°
Clear.
Wed
42° 23°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 25° Clear 8% 5 mph S 72%
2 AM 24° Clear 8% 6 mph S 70%
3 AM 24° Clear 3% 6 mph S 74%
4 AM 24° Clear 3% 6 mph S 76%
5 AM 22° Clear 3% 5 mph SSW 79%
6 AM 22° Clear 3% 5 mph S 81%
7 AM 24° Clear 3% 7 mph SSW 74%
8 AM 27° Clear 3% 8 mph SW 65%
9 AM 30° Clear 3% 9 mph SW 57%
10 AM 32° Clear 3% 9 mph SW 52%
11 AM 32° Clear 3% 10 mph SW 47%
12 PM 34° Clear 3% 10 mph SW 42%
1 PM 36° Mostly Clear 3% 10 mph SW 41%
2 PM 36° Mostly Clear 3% 9 mph SW 40%
3 PM 36° Mostly Clear 3% 8 mph SW 40%
4 PM 35° Mostly Clear 3% 8 mph SSW 43%
5 PM 36° Clear 3% 7 mph SSW 48%
6 PM 34° Clear 3% 7 mph SSW 54%
7 PM 33° Clear 3% 7 mph S 56%
8 PM 33° Clear 3% 7 mph S 58%
9 PM 28° Clear 3% 7 mph S 60%
10 PM 28° Clear 3% 7 mph S 61%
11 PM 27° Clear 3% 7 mph S 62%
12 AM 27° Clear 3% 6 mph S 64%
15-Day Forecast
Today
9/3
Clear
8%
23°
36°
Fri
9/4
Mostly Clear
3%
23°
40°
Sat
9/5
Clear
16%
23°
41°
Sun
9/6
Fog
8%
18°
32°
Mon
9/7
Clear
8%
14°
35°
Tue
9/8
Clear
17%
18°
39°
Wed
9/9
Clear
17%
23°
42°
Thu
9/10
Rain
69%
21°
41°
Fri
9/11
Drizzle
68%
20°
39°
Sat
9/12
Drizzle
51%
21°
39°
Sun
9/13
Drizzle
60%
20°
34°
Mon
9/14
Drizzle
60%
19°
35°
Tue
9/15
Drizzle
60%
18°
33°
Wed
9/16
Drizzle
60%
17°
32°
Thu
9/17
Drizzle
60%
17°
32°
53
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
53 AQI 10.0 µg/m³
O3
Ground-level ozone
45 AQI 49 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 53 Moderate 45 53
Fri 52 Moderate 47 52
Sat 46 Good 43 46
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 Thu Sep 3, 05:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE73 J/kg
MLCAPE126 J/kg
MUCAPE454 J/kg
SBCIN-579 J/kg
MLCIN-302 J/kg
Lifted Index-0.6
Kinematics
0–6 km Shear15 kt
0–1 km Shear11 kt
Eff. Shear11 kt
0–1 km SRH47
0–3 km SRH42
Eff. SRH-19
Storm Motion330° @ 12 kt
0–1 km EHI0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index32.1
Thermo & Levels
PWAT1.43 in
0–3 km LR5.3 °C/km
700–500 LR5.6 °C/km
Total Totals44.6
LCL922 hPa
LFC532 hPa
EL331 hPa
Freezing Lvl16,004 ft