Severe Thunderstorm Watch 12:00 AM

Will County, Illinois, United States

Last updated: 10:13 PM CDT  ·  Refresh
22°C
Feels like 23°
Mostly Cloudy
▲ 27°  /  ▼ 14°
Wind
5 mph SSW
Humidity
92%
Dew Point
19°
Pressure
29.24 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
63%
Sunrise
6:07 AM
Sunset
7:42 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Will County is currently mostly cloudy at 21°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 1694 J/kg) — isolated convective development possible. Sunrise: 6:07AM · Sunset: 7:42PM.

Alerts

Severe Thunderstorm Watch
Expires 12:00 AM
47 AQI · Good Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
22°
27%
11 PM
22°
35%
12 AM
21°
35%
1 AM
20°
5%
2 AM
20°
5%
3 AM
19°
5%
4 AM
19°
6%
5 AM
18°
6%
6 AM
17°
3%
7 AM
17°
14%
8 AM
18°
10%
9 AM
21°
13%
10 AM
22°
31%
11 AM
23°
31%
12 PM
24°
32%
1 PM
26°
25%
2 PM
27°
26%
3 PM
27°
26%
4 PM
26°
16%
5 PM
26°
12%
6 PM
25°
12%
7 PM
24°
3%
8 PM
23°
3%
9 PM
21°
3%
7-Day Forecast
Tonight
27° 14°
Mostly Cloudy with a 27% chance of rain.
Sat
27° 16°
Mostly Clear with a 31% chance of rain.
Sun
24° 14°
Partly Cloudy.
Mon
24° 13°
Mostly Cloudy with a 37% chance of rain.
Tue
25° 13°
Rain, 64% chance.
Wed
28° 14°
Rain, 64% chance.
Thu
28° 17°
Drizzle, 52% chance.
TimeTempConditionsPrecipWindHumidity
Now 22° Mostly Cloudy 27% 5 mph SSW 92%
11 PM 22° Partly Cloudy 35% 6 mph WSW 93%
12 AM 21° Partly Cloudy 35% 4 mph WSW 94%
1 AM 20° Partly Cloudy 5% 5 mph SW 94%
2 AM 20° Mostly Clear 5% 6 mph WSW 95%
3 AM 19° Mostly Clear 5% 6 mph W 96%
4 AM 19° Partly Cloudy 6% 7 mph W 97%
5 AM 18° Partly Cloudy 6% 8 mph WNW 96%
6 AM 17° Partly Cloudy 3% 8 mph NW 96%
7 AM 17° Partly Cloudy 14% 9 mph NW 94%
8 AM 18° Mostly Clear 10% 10 mph NW 88%
9 AM 21° Mostly Clear 13% 11 mph NNW 82%
10 AM 22° Mostly Clear 31% 11 mph NNW 75%
11 AM 23° Mostly Clear 31% 12 mph NW 71%
12 PM 24° Clear 32% 12 mph NW 67%
1 PM 26° Clear 25% 12 mph NW 64%
2 PM 27° Mostly Clear 26% 12 mph WNW 65%
3 PM 27° Mostly Clear 26% 12 mph WNW 65%
4 PM 26° Mostly Clear 16% 12 mph WNW 67%
5 PM 26° Mostly Clear 12% 11 mph WNW 69%
6 PM 25° Mostly Clear 12% 10 mph WNW 71%
7 PM 24° Clear 3% 10 mph NW 72%
8 PM 23° Clear 3% 10 mph NW 74%
9 PM 21° Clear 3% 9 mph NW 76%
15-Day Forecast
Today
8/21
Mostly Cloudy
27%
14°
27°
Sat
8/22
Mostly Clear
31%
16°
27°
Sun
8/23
Partly Cloudy
3%
14°
24°
Mon
8/24
Mostly Cloudy
37%
13°
24°
Tue
8/25
Rain
64%
13°
25°
Wed
8/26
Rain
64%
14°
28°
Thu
8/27
Drizzle
52%
17°
28°
Fri
8/28
Clear
17%
17°
28°
Sat
8/29
Rain
68%
17°
28°
Sun
8/30
Rain
68%
19°
28°
Mon
8/31
Drizzle
60%
20°
32°
Tue
9/1
Drizzle
60%
19°
32°
Wed
9/2
Drizzle
60%
19°
28°
Thu
9/3
Drizzle
60%
18°
27°
Fri
9/4
Drizzle
60%
17°
28°
47
Good
U.S. Air Quality Index · Dominant: PM2.5
50 100 150 200

Air quality is satisfactory and poses little or no health risk.

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
Dominant
47 AQI 8.4 µg/m³
O3
Ground-level ozone
38 AQI 42 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 47 Good 38 47
Sun 29 Good 29 23
Mon 24 Good 24 11
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 60 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE1014 J/kg
MLCAPE1218 J/kg
MUCAPE1448 J/kg
SBCIN-202 J/kg
MLCIN-111 J/kg
Lifted Index-4.1
Kinematics
0–6 km Shear27 kt
0–1 km Shear17 kt
Eff. Shear25 kt
0–1 km SRH123
0–3 km SRH139
Eff. SRH139
Storm Motion341° @ 14 kt
0–1 km EHI0.8
Composite Parameters
Sig. Tornado0.4
STP (eff)0.3
Supercell2.6
K-Index32.4
Thermo & Levels
PWAT1.54 in
0–3 km LR5.4 °C/km
700–500 LR6.6 °C/km
Total Totals52.4
LCL961 hPa
LFC727 hPa
EL224 hPa
Freezing Lvl11,991 ft