Severe Thunderstorm Watch 12:00 AM Severe Thunderstorm Watch 12:00 AM

McLean County, Illinois, United States

Last updated: 10:24 PM CDT  ·  Refresh
22°C
Feels like 23°
Partly Cloudy
▲ 28°  /  ▼ 14°
Wind
6 mph SSW
Humidity
88%
Dew Point
19°
Pressure
29.10 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
45%
Sunrise
6:12 AM
Sunset
7:44 PM
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WeatherAI™ Analysis

WeatherAI Analysis: McLean County is currently partly cloudy at 22°C. Precipitation is likely — peak probability 54% around 12 AM. Atmospheric instability is elevated (CAPE up to 1687 J/kg) — isolated convective development possible. Sunrise: 6:12AM · Sunset: 7:44PM.

Alerts

Severe Thunderstorm Watch
Expires 12:00 AM
Severe Thunderstorm Watch
Expires 12:00 AM
38 AQI · Good Dominant: O3 Air Quality
Hourly Forecast · Next 24 Hours
Now
22°
27%
11 PM
22°
50%
12 AM
21°
53%
1 AM
20°
52%
2 AM
20°
23%
3 AM
19°
25%
4 AM
19°
20%
5 AM
18°
20%
6 AM
17°
3%
7 AM
18°
3%
8 AM
19°
5%
9 AM
21°
8%
10 AM
22°
17%
11 AM
23°
17%
12 PM
24°
17%
1 PM
26°
9%
2 PM
26°
9%
3 PM
26°
9%
4 PM
26°
10%
5 PM
26°
5%
6 PM
26°
5%
7 PM
24°
3%
8 PM
24°
3%
9 PM
21°
3%
7-Day Forecast
Tonight
28° 14°
Partly Cloudy with a 27% chance of rain.
Sat
26° 15°
Mostly Clear with a 52% chance of rain.
Sun
24° 13°
Mostly Clear.
Mon
23° 14°
Mostly Cloudy with a 44% chance of rain.
Tue
24° 14°
Partly Cloudy with a 51% chance of rain.
Wed
27° 16°
Rain, 64% chance.
Thu
27° 17°
Rain, 64% chance.
TimeTempConditionsPrecipWindHumidity
Now 22° Partly Cloudy 27% 6 mph SSW 88%
11 PM 22° Drizzle 50% 6 mph SW 88%
12 AM 21° Rain 53% 8 mph WSW 91%
1 AM 20° Partly Cloudy 52% 7 mph WSW 95%
2 AM 20° Mostly Clear 23% 6 mph WSW 96%
3 AM 19° Mostly Clear 25% 6 mph W 96%
4 AM 19° Partly Cloudy 20% 7 mph WNW 96%
5 AM 18° Partly Cloudy 20% 7 mph WNW 95%
6 AM 17° Partly Cloudy 3% 8 mph NW 94%
7 AM 18° Partly Cloudy 3% 8 mph NW 92%
8 AM 19° Mostly Clear 5% 9 mph NNW 88%
9 AM 21° Mostly Clear 8% 10 mph NNW 84%
10 AM 22° Clear 17% 10 mph NNW 78%
11 AM 23° Clear 17% 10 mph NW 73%
12 PM 24° Clear 17% 11 mph NW 68%
1 PM 26° Clear 9% 11 mph NW 66%
2 PM 26° Mostly Clear 9% 12 mph NW 67%
3 PM 26° Mostly Clear 9% 12 mph WNW 68%
4 PM 26° Mostly Clear 10% 12 mph WNW 70%
5 PM 26° Mostly Clear 5% 10 mph NW 74%
6 PM 26° Mostly Clear 5% 9 mph NW 77%
7 PM 24° Mostly Clear 3% 9 mph NW 77%
8 PM 24° Clear 3% 9 mph NW 78%
9 PM 21° Clear 3% 9 mph NW 79%
15-Day Forecast
Today
8/21
Partly Cloudy
27%
14°
28°
Sat
8/22
Mostly Clear
52%
15°
26°
Sun
8/23
Mostly Clear
7%
13°
24°
Mon
8/24
Mostly Cloudy
44%
14°
23°
Tue
8/25
Partly Cloudy
51%
14°
24°
Wed
8/26
Rain
64%
16°
27°
Thu
8/27
Rain
64%
17°
27°
Fri
8/28
Clear
17%
17°
27°
Sat
8/29
Thunderstorm
68%
17°
28°
Sun
8/30
Rain
68%
19°
29°
Mon
8/31
Drizzle
60%
20°
32°
Tue
9/1
Drizzle
60%
19°
31°
Wed
9/2
Drizzle
60%
19°
28°
Thu
9/3
Drizzle
60%
18°
28°
Fri
9/4
Drizzle
60%
17°
28°
38
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
37 AQI 6.6 µg/m³
O3
Ground-level ozone
Dominant
38 AQI 42 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 38 Good 38 37
Sun 32 Good 32 27
Mon 29 Good 29 14
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 Sat Aug 22, 02:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 50 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE841 J/kg
MLCAPE1270 J/kg
MUCAPE1572 J/kg
SBCIN-188 J/kg
MLCIN-69 J/kg
Lifted Index-3.1
Kinematics
0–6 km Shear28 kt
0–1 km Shear18 kt
Eff. Shear27 kt
0–1 km SRH133
0–3 km SRH175
Eff. SRH175
Storm Motion333° @ 21 kt
0–1 km EHI0.7
Composite Parameters
Sig. Tornado0.4
STP (eff)0.6
Supercell3.8
K-Index28.6
Thermo & Levels
PWAT1.35 in
0–3 km LR5.1 °C/km
700–500 LR6.5 °C/km
Total Totals51.0
LCL955 hPa
LFC711 hPa
EL236 hPa
Freezing Lvl12,959 ft