Severe Thunderstorm Watch 7:00 PM Areal Flood Advisory — Lake County, IN, Newton County, IN 7:45 PM Flash Flood Warning — DuPage County, IL, Will County, IL 8:15 PM Flash Flood Warning — DuPage County, IL, Will County, IL 9:30 PM Flood Warning — DuPage County, IL, Will County, IL 1:00 AM

Will County, Illinois, United States

Last updated: 6:15 PM CDT  ·  Refresh
23°C
Feels like 26°
Heavy Rain
▲ 30°  /  ▼ 18°
Wind
7 mph ESE
Humidity
95%
Dew Point
22°
Pressure
29.23 inHg
Visibility
4 mi
UV Index
1.7
Cloud Cover
96%
Sunrise
5:23 AM
Sunset
8:28 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Will County is currently heavy rain at 23°C. Precipitation is likely — peak probability 86% around 6 PM. Atmospheric instability is elevated (CAPE up to 788 J/kg) — isolated convective development possible. Sunrise: 5:23AM · Sunset: 8:28PM.

Alerts

Severe Thunderstorm Watch
Expires 7:00 PM
Areal Flood Advisory
Lake County, IN, Newton County, IN
Expires 7:45 PM
Flash Flood Warning
DuPage County, IL, Will County, IL
Expires 8:15 PM
Flash Flood Warning
DuPage County, IL, Will County, IL
Expires 9:30 PM
Flood Warning
DuPage County, IL, Will County, IL
Expires 1:00 AM
53 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
23°
86%
7 PM
24°
67%
8 PM
24°
66%
9 PM
23°
66%
10 PM
23°
41%
11 PM
22°
35%
12 AM
22°
44%
1 AM
21°
32%
2 AM
21°
32%
3 AM
20°
23%
4 AM
20°
23%
5 AM
18°
23%
6 AM
18°
19%
7 AM
19°
19%
8 AM
19°
24%
9 AM
21°
24%
10 AM
22°
24%
11 AM
23°
27%
12 PM
23°
37%
1 PM
26°
37%
2 PM
26°
37%
3 PM
26°
37%
4 PM
26°
37%
5 PM
26°
42%
7-Day Forecast
Tonight
30° 18°
Heavy Rain, 86% chance.
Sun
27° 18°
Mostly Cloudy with a 44% chance of rain.
Mon
27° 17°
Mostly Clear.
Tue
28° 16°
Partly Cloudy.
Wed
28° 18°
Mostly Clear with a 30% chance of rain.
Thu
26° 19°
Rain, 82% chance.
Fri
26° 17°
Drizzle, 52% chance.
TimeTempConditionsPrecipWindHumidity
Now 23° Heavy Rain 86% 7 mph ESE 95%
7 PM 24° Rain 67% 8 mph E 96%
8 PM 24° Overcast 66% 5 mph E 96%
9 PM 23° Overcast 66% 4 mph ENE 97%
10 PM 23° Overcast 41% 3 mph NE 97%
11 PM 22° Overcast 35% 4 mph NE 97%
12 AM 22° Overcast 44% 5 mph NNE 97%
1 AM 21° Overcast 32% 6 mph NNE 98%
2 AM 21° Overcast 32% 5 mph N 98%
3 AM 20° Overcast 23% 5 mph N 98%
4 AM 20° Overcast 23% 5 mph N 97%
5 AM 18° Overcast 23% 5 mph N 97%
6 AM 18° Haze 19% 5 mph N 96%
7 AM 19° Mostly Cloudy 19% 5 mph N 95%
8 AM 19° Mostly Cloudy 24% 5 mph N 93%
9 AM 21° Mostly Cloudy 24% 6 mph N 91%
10 AM 22° Mostly Cloudy 24% 6 mph N 89%
11 AM 23° Mostly Cloudy 27% 6 mph N 86%
12 PM 23° Mostly Cloudy 37% 7 mph NNE 83%
1 PM 26° Mostly Cloudy 37% 8 mph NNE 81%
2 PM 26° Mostly Cloudy 37% 8 mph NNE 81%
3 PM 26° Mostly Cloudy 37% 9 mph NNE 80%
4 PM 26° Partly Cloudy 37% 9 mph NNE 80%
5 PM 26° Partly Cloudy 42% 10 mph NNE 81%
15-Day Forecast
Today
7/4
Heavy Rain
86%
18°
30°
Sun
7/5
Mostly Cloudy
44%
18°
27°
Mon
7/6
Mostly Clear
12%
17°
27°
Tue
7/7
Partly Cloudy
14%
16°
28°
Wed
7/8
Mostly Clear
30%
18°
28°
Thu
7/9
Rain
82%
19°
26°
Fri
7/10
Drizzle
52%
17°
26°
Sat
7/11
Clear
53%
17°
26°
Sun
7/12
Clear
43%
16°
26°
Mon
7/13
Partly Cloudy
44%
16°
27°
Tue
7/14
Overcast
27%
17°
28°
Wed
7/15
Drizzle
60%
18°
28°
Thu
7/16
Drizzle
60%
17°
26°
Fri
7/17
Drizzle
60%
17°
26°
Sat
7/18
Drizzle
60%
18°
27°
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 10.4 µg/m³
O3
Ground-level ozone
39 AQI 43 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Sun 53 Moderate 39 53
Mon 49 Good 46 49
Tue 58 Moderate 42 58
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 Jul 4, 22:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE608 J/kg
MLCAPE1428 J/kg
MUCAPE1769 J/kg
SBCIN-93 J/kg
MLCIN0 J/kg
Lifted Index-2.8
Kinematics
0–6 km Shear21 kt
0–1 km Shear7 kt
Eff. Shear23 kt
0–1 km SRH-34
0–3 km SRH-45
Eff. SRH-45
Storm Motion175° @ 18 kt
0–1 km EHI-0.1
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index40.2
Thermo & Levels
PWAT2.28 in
0–3 km LR5.5 °C/km
700–500 LR5.3 °C/km
Total Totals49.4
LCL967 hPa
LFC772 hPa
EL262 hPa
Freezing Lvl13,520 ft