Severe Thunderstorm Watch 7:00 PM Severe Thunderstorm Watch 7:00 PM

DuPage County, Illinois, United States

Last updated: 6:06 PM CDT  ·  Refresh
27°C
Feels like 29°
Partly Cloudy
▲ 29°  /  ▼ 21°
Wind
10 mph SSW
Humidity
73%
Dew Point
23°
Pressure
28.90 inHg
Visibility
6 mi
UV Index
4.2
Cloud Cover
59%
Sunrise
5:41 AM
Sunset
8:15 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: DuPage County is currently partly cloudy at 27°C. Precipitation is likely — peak probability 58% around 9 PM. Atmospheric instability is elevated (CAPE up to 2204 J/kg) — isolated convective development possible. Sunrise: 5:41AM · Sunset: 8:15PM.

Alerts

Severe Thunderstorm Watch
Expires 7:00 PM
Severe Thunderstorm Watch
Expires 7:00 PM
52 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
27°
35%
7 PM
28°
34%
8 PM
27°
37%
9 PM
27°
57%
10 PM
27°
38%
11 PM
27°
23%
12 AM
26°
17%
1 AM
25°
4%
2 AM
24°
4%
3 AM
23°
4%
4 AM
23°
4%
5 AM
21°
7%
6 AM
21°
6%
7 AM
21°
6%
8 AM
21°
6%
9 AM
23°
6%
10 AM
23°
3%
11 AM
24°
3%
12 PM
26°
3%
1 PM
24°
3%
2 PM
24°
3%
3 PM
24°
3%
4 PM
24°
3%
5 PM
28°
3%
7-Day Forecast
Tonight
29° 21°
Partly Cloudy with a 57% chance of rain.
Tue
28° 20°
Partly Cloudy.
Wed
30° 18°
Clear.
Thu
31° 21°
Mostly Clear with a 52% chance of rain.
Fri
26° 20°
Rain, 57% chance.
Sat
27° 19°
Rain, 83% chance.
Sun
27° 19°
Mostly Clear with a 33% chance of rain.
TimeTempConditionsPrecipWindHumidity
Now 27° Partly Cloudy 35% 10 mph SSW 73%
7 PM 28° Mostly Clear 34% 10 mph SSW 72%
8 PM 27° Clear 37% 10 mph SW 78%
9 PM 27° Heavy Rain 57% 10 mph SW 82%
10 PM 27° Clear 38% 6 mph W 88%
11 PM 27° Mostly Clear 23% 7 mph W 88%
12 AM 26° Mostly Clear 17% 7 mph WNW 87%
1 AM 25° Partly Cloudy 4% 7 mph NW 88%
2 AM 24° Haze 4% 7 mph N 90%
3 AM 23° Partly Cloudy 4% 10 mph N 91%
4 AM 23° Partly Cloudy 4% 12 mph N 91%
5 AM 21° Mostly Cloudy 7% 11 mph N 90%
6 AM 21° Mostly Cloudy 6% 10 mph N 90%
7 AM 21° Mostly Cloudy 6% 10 mph N 88%
8 AM 21° Mostly Cloudy 6% 10 mph NNE 82%
9 AM 23° Mostly Cloudy 6% 10 mph NNE 76%
10 AM 23° Mostly Cloudy 3% 10 mph NNE 70%
11 AM 24° Partly Cloudy 3% 11 mph NNE 64%
12 PM 26° Partly Cloudy 3% 11 mph NNE 59%
1 PM 24° Mostly Clear 3% 11 mph NNE 55%
2 PM 24° Mostly Clear 3% 11 mph NNE 52%
3 PM 24° Mostly Clear 3% 11 mph NNE 49%
4 PM 24° Mostly Clear 3% 11 mph NNE 46%
5 PM 28° Clear 3% 11 mph NNE 48%
15-Day Forecast
Today
7/27
Partly Cloudy
57%
21°
29°
Tue
7/28
Partly Cloudy
17%
20°
28°
Wed
7/29
Clear
6%
18°
30°
Thu
7/30
Mostly Clear
52%
21°
31°
Fri
7/31
Rain
57%
20°
26°
Sat
8/1
Rain
83%
19°
27°
Sun
8/2
Mostly Clear
33%
19°
27°
Mon
8/3
Clear
30%
19°
29°
Tue
8/4
Thunderstorm
47%
21°
30°
Wed
8/5
Rain
66%
21°
28°
Thu
8/6
Drizzle
67%
18°
29°
Fri
8/7
Drizzle
60%
22°
29°
Sat
8/8
Drizzle
60%
22°
29°
Sun
8/9
Drizzle
60%
21°
28°
Mon
8/10
Drizzle
60%
21°
28°
52
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
52 AQI 9.8 µg/m³
O3
Ground-level ozone
41 AQI 44 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Tue 52 Moderate 41 52
Wed 32 Good 32 31
Thu 47 Good 47 43
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 Mon Jul 27, 21:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 50 60 70 80 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE1670 J/kg
MLCAPE2679 J/kg
MUCAPE3346 J/kg
SBCIN0 J/kg
MLCIN0 J/kg
Lifted Index-4.6
Kinematics
0–6 km Shear52 kt
0–1 km Shear28 kt
Eff. Shear50 kt
0–1 km SRH267
0–3 km SRH276
Eff. SRH276
Storm Motion278° @ 39 kt
0–1 km EHI2.8
Composite Parameters
Sig. Tornado4.0
STP (eff)4.0
Supercell23.8
K-Index27.7
Thermo & Levels
PWAT1.83 in
0–3 km LR4.7 °C/km
700–500 LR6.8 °C/km
Total Totals52.3
LCL927 hPa
LFC979 hPa
EL196 hPa
Freezing Lvl15,705 ft