Tornado Warning — Iroquois County, IL 6:15 PM Tornado Warning — Iroquois County, IL 6:45 PM Severe Thunderstorm Warning — Iroquois County, IL, Benton County, IN 6:30 PM Severe Thunderstorm Watch 7:00 PM Heat Advisory — Boone, IL, McHenry, IL, Kane, IL, Kendall, IL, Kankakee, IL, Iroquois, IL, Northern Will, IL, Southern Will, IL, Eastern Will, IL, Winnebago, IL, Ogle, IL, Lee, IL, De Kalb, IL, La Salle, IL, Grundy, IL, Livingston, IL, Ford, IL, Porter, IN, Lake, IN, Newton, IN, Jasper, IN, Benton, IN 9:00 PM Excessive Heat Warning — Winnebago, IL, Ogle, IL, Lee, IL, De Kalb, IL, La Salle, IL, Grundy, IL, Livingston, IL, Ford, IL, Lake, IN, Newton, IN, Jasper, IN, Benton, IN, Porter, IN, Boone, IL, McHenry, IL, Kane, IL, Kendall, IL, Lake, IL, DuPage, IL, Kankakee, IL, Iroquois, IL, Northern Cook, IL, Central Cook, IL, Southern Cook, IL, Northern Will, IL, Southern Will, IL, Eastern Will, IL 9:00 PM

Iroquois County, Illinois, United States

Last updated: 6:09 PM CDT  ·  Refresh
27°C
Feels like 29°
Heavy Rain
▲ 30°  /  ▼ 21°
Wind
12 mph SSW
Humidity
73%
Dew Point
23°
Pressure
29.04 inHg
Visibility
8 mi
UV Index
3.5
Cloud Cover
71%
Sunrise
5:43 AM
Sunset
8:11 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Iroquois County is currently heavy rain at 27°C. Precipitation is likely — peak probability 54% around 7 PM. Atmospheric instability is elevated (CAPE up to 1932 J/kg) — isolated convective development possible. Sunrise: 5:43AM · Sunset: 8:11PM.

Alerts

Tornado Warning
Iroquois County, IL
Expires 6:15 PM
Tornado Warning
Iroquois County, IL
Expires 6:45 PM
Severe Thunderstorm Warning
Iroquois County, IL, Benton County, IN
Expires 6:30 PM
Severe Thunderstorm Watch
Expires 7:00 PM
Heat Advisory
Boone, IL, McHenry, IL, Kane, IL, Kendall, IL, Kankakee, IL, Iroquois, IL, Northern Will, IL, Southern Will, IL, Eastern Will, IL, Winnebago, IL, Ogle, IL, Lee, IL, De Kalb, IL, La Salle, IL, Grundy, IL, Livingston, IL, Ford, IL, Porter, IN, Lake, IN, Newton, IN, Jasper, IN, Benton, IN
Expires 9:00 PM
Excessive Heat Warning
Winnebago, IL, Ogle, IL, Lee, IL, De Kalb, IL, La Salle, IL, Grundy, IL, Livingston, IL, Ford, IL, Lake, IN, Newton, IN, Jasper, IN, Benton, IN, Porter, IN, Boone, IL, McHenry, IL, Kane, IL, Kendall, IL, Lake, IL, DuPage, IL, Kankakee, IL, Iroquois, IL, Northern Cook, IL, Central Cook, IL, Southern Cook, IL, Northern Will, IL, Southern Will, IL, Eastern Will, IL
Expires 9:00 PM
48 AQI · Good Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
27°
50%
7 PM
27°
53%
8 PM
26°
52%
9 PM
26°
35%
10 PM
26°
51%
11 PM
26°
35%
12 AM
26°
24%
1 AM
24°
12%
2 AM
24°
12%
3 AM
24°
12%
4 AM
23°
3%
5 AM
22°
3%
6 AM
22°
3%
7 AM
21°
3%
8 AM
22°
3%
9 AM
23°
3%
10 AM
23°
3%
11 AM
24°
3%
12 PM
24°
3%
1 PM
26°
4%
2 PM
26°
3%
3 PM
26°
3%
4 PM
26°
3%
5 PM
26°
3%
7-Day Forecast
Tonight
30° 21°
Heavy Rain, 50% chance.
Tue
28° 16°
Partly Cloudy with a 24% chance of rain.
Wed
27° 14°
Clear.
Thu
28° 17°
Mostly Clear with a 45% chance of rain.
Fri
23° 19°
Mostly Cloudy with a 33% chance of rain.
Sat
24° 17°
Rain, 80% chance.
Sun
26° 17°
Mostly Clear with a 21% chance of rain.
TimeTempConditionsPrecipWindHumidity
Now 27° Heavy Rain 50% 12 mph SSW 73%
7 PM 27° Rain 53% 13 mph SSW 74%
8 PM 26° Partly Cloudy 52% 10 mph SW 73%
9 PM 26° Partly Cloudy 35% 9 mph SW 73%
10 PM 26° Partly Cloudy 51% 10 mph SW 73%
11 PM 26° Partly Cloudy 35% 10 mph WSW 76%
12 AM 26° Mostly Clear 24% 10 mph WSW 80%
1 AM 24° Clear 12% 9 mph W 84%
2 AM 24° Partly Cloudy 12% 8 mph WNW 87%
3 AM 24° Partly Cloudy 12% 8 mph WNW 89%
4 AM 23° Partly Cloudy 3% 8 mph NW 91%
5 AM 22° Partly Cloudy 3% 9 mph NNW 93%
6 AM 22° Partly Cloudy 3% 11 mph N 93%
7 AM 21° Partly Cloudy 3% 12 mph N 92%
8 AM 22° Partly Cloudy 3% 12 mph N 89%
9 AM 23° Mostly Cloudy 3% 12 mph N 86%
10 AM 23° Mostly Cloudy 3% 12 mph N 83%
11 AM 24° Mostly Cloudy 3% 12 mph N 78%
12 PM 24° Mostly Cloudy 3% 12 mph N 74%
1 PM 26° Mostly Cloudy 4% 12 mph N 71%
2 PM 26° Partly Cloudy 3% 12 mph N 70%
3 PM 26° Partly Cloudy 3% 12 mph N 68%
4 PM 26° Mostly Clear 3% 12 mph N 68%
5 PM 26° Clear 3% 12 mph N 69%
15-Day Forecast
Today
7/27
Heavy Rain
50%
21°
30°
Tue
7/28
Partly Cloudy
24%
16°
28°
Wed
7/29
Clear
6%
14°
27°
Thu
7/30
Mostly Clear
45%
17°
28°
Fri
7/31
Mostly Cloudy
33%
19°
23°
Sat
8/1
Rain
80%
17°
24°
Sun
8/2
Mostly Clear
21%
17°
26°
Mon
8/3
Clear
27%
17°
28°
Tue
8/4
Thunderstorm
47%
18°
28°
Wed
8/5
Rain
66%
19°
27°
Thu
8/6
Rain
64%
18°
26°
Fri
8/7
Drizzle
60%
19°
26°
Sat
8/8
Drizzle
60%
20°
26°
Sun
8/9
Drizzle
60%
19°
26°
Mon
8/10
Clear
60%
19°
26°
48
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
48 AQI 8.7 µg/m³
O3
Ground-level ozone
37 AQI 41 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Tue 48 Good 37 48
Wed 43 Good 38 43
Thu 39 Good 39 39
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 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE1965 J/kg
MLCAPE2363 J/kg
MUCAPE2574 J/kg
SBCIN0 J/kg
MLCIN0 J/kg
Lifted Index-6.2
Kinematics
0–6 km Shear44 kt
0–1 km Shear18 kt
Eff. Shear51 kt
0–1 km SRH140
0–3 km SRH101
Eff. SRH101
Storm Motion270° @ 38 kt
0–1 km EHI1.7
Composite Parameters
Sig. Tornado2.1
STP (eff)1.7
Supercell6.8
K-Index43.0
Thermo & Levels
PWAT2.21 in
0–3 km LR5.2 °C/km
700–500 LR6.9 °C/km
Total Totals52.4
LCL928 hPa
LFC983 hPa
EL182 hPa
Freezing Lvl15,272 ft