Areal Flood Warning — De Kalb County, IL, Kane County, IL, La Salle County, IL, Lee County, IL 11:00 PM Flood Warning — Bureau County, IL, La Salle County, IL, Putnam County, IL 4:26 PM

LaSalle, Illinois

Last updated: 8:26 PM CDT  ·  Refresh
22°C
Feels like 26°
Partly Cloudy
▲ 28°  /  ▼ 18°
Wind
3 mph NE
Humidity
92%
Dew Point
21°
Pressure
29.29 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
51%
Sunrise
5:28 AM
Sunset
8:32 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: LaSalle is currently partly cloudy at 22°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 1267 J/kg) — isolated convective development possible. Sunrise: 5:28AM · Sunset: 8:32PM.

Alerts

Areal Flood Warning
De Kalb County, IL, Kane County, IL, La Salle County, IL, Lee County, IL
Expires 11:00 PM
Flood Warning
Bureau County, IL, La Salle County, IL, Putnam County, IL
Expires 4:26 PM
54 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
22°
31%
9 PM
22°
28%
10 PM
21°
21%
11 PM
21°
39%
12 AM
21°
14%
1 AM
20°
10%
2 AM
20°
11%
3 AM
20°
11%
4 AM
20°
11%
5 AM
18°
12%
6 AM
18°
8%
7 AM
19°
8%
8 AM
20°
8%
9 AM
22°
8%
10 AM
23°
8%
11 AM
24°
11%
12 PM
24°
18%
1 PM
25°
18%
2 PM
25°
18%
3 PM
26°
18%
4 PM
26°
18%
5 PM
27°
18%
6 PM
26°
18%
7 PM
26°
14%
7-Day Forecast
Tonight
28° 18°
Partly Cloudy with a 39% chance of rain.
Sun
27° 17°
Mostly Cloudy.
Mon
27° 16°
Clear.
Tue
27° 15°
Clear.
Wed
27° 17°
Rain, 50% chance.
Thu
24° 17°
Rain, 71% chance.
Fri
24° 16°
Rain, 63% chance.
TimeTempConditionsPrecipWindHumidity
Now 22° Partly Cloudy 31% 3 mph NE 92%
9 PM 22° Partly Cloudy 28% 4 mph NNE 95%
10 PM 21° Mostly Cloudy 21% 4 mph NE 97%
11 PM 21° Overcast 39% 4 mph NE 97%
12 AM 21° Mostly Cloudy 14% 4 mph N 97%
1 AM 20° Mostly Cloudy 10% 5 mph N 97%
2 AM 20° Mostly Cloudy 11% 5 mph N 97%
3 AM 20° Mostly Cloudy 11% 5 mph N 97%
4 AM 20° Mostly Cloudy 11% 5 mph N 97%
5 AM 18° Mostly Cloudy 12% 4 mph N 96%
6 AM 18° Mostly Cloudy 8% 4 mph N 96%
7 AM 19° Partly Cloudy 8% 5 mph N 93%
8 AM 20° Partly Cloudy 8% 5 mph NNW 89%
9 AM 22° Mostly Cloudy 8% 6 mph NNW 87%
10 AM 23° Mostly Cloudy 8% 7 mph N 84%
11 AM 24° Mostly Cloudy 11% 8 mph N 83%
12 PM 24° Mostly Cloudy 18% 8 mph N 82%
1 PM 25° Mostly Cloudy 18% 8 mph N 81%
2 PM 25° Mostly Cloudy 18% 8 mph NNE 80%
3 PM 26° Mostly Cloudy 18% 8 mph NNE 80%
4 PM 26° Mostly Cloudy 18% 8 mph NNE 80%
5 PM 27° Mostly Cloudy 18% 8 mph NNE 80%
6 PM 26° Mostly Cloudy 18% 9 mph NNE 81%
7 PM 26° Mostly Cloudy 14% 9 mph NNE 82%
15-Day Forecast
Today
7/4
Partly Cloudy
39%
18°
28°
Sun
7/5
Mostly Cloudy
18%
17°
27°
Mon
7/6
Clear
6%
16°
27°
Tue
7/7
Clear
3%
15°
27°
Wed
7/8
Rain
50%
17°
27°
Thu
7/9
Rain
71%
17°
24°
Fri
7/10
Rain
63%
16°
24°
Sat
7/11
Clear
53%
16°
23°
Sun
7/12
Drizzle
43%
13°
24°
Mon
7/13
Clear
44%
13°
24°
Tue
7/14
Clear
25%
18°
27°
Wed
7/15
Drizzle
60%
18°
27°
Thu
7/16
Drizzle
60%
18°
25°
Fri
7/17
Drizzle
60%
18°
25°
Sat
7/18
Drizzle
60%
19°
26°
54
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
54 AQI 11.0 µg/m³
O3
Ground-level ozone
35 AQI 38 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 54 Moderate 35 54
Mon 52 Moderate 39 52
Tue 57 Moderate 44 57
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, 23:00'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
SBCAPE184 J/kg
MLCAPE171 J/kg
MUCAPE266 J/kg
SBCIN-67 J/kg
MLCIN0 J/kg
Lifted Index-1.1
Kinematics
0–6 km Shear23 kt
0–1 km Shear6 kt
Eff. Shear21 kt
0–1 km SRH3
0–3 km SRH-1
Eff. SRH-1
Storm Motion187° @ 6 kt
0–1 km EHI0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index30.7
Thermo & Levels
PWAT1.73 in
0–3 km LR4.9 °C/km
700–500 LR5.4 °C/km
Total Totals43.3
LCL970 hPa
LFC745 hPa
EL319 hPa
Freezing Lvl14,925 ft