Flood Warning — Brown County, IL, Cass County, IL, Morgan County, IL, Schuyler County, IL Flood Warning — Peoria County, IL, Tazewell County, IL, Woodford County, IL, Brown County, IL, Cass County, IL, Morgan County, IL, Schuyler County, IL, Fulton County, IL, Mason County, IL Flood Warning — Fulton County, IL, Knox County, IL, Piatt County, IL, Cass County, IL, Mason County, IL 2:30 PM Flood Warning — Piatt County, IL, Cass County, IL, Mason County, IL 7:00 AM Flood Warning — Cass County, IL, Mason County, IL 7:00 AM Flood Warning — Marshall County, IL, Putnam County, IL, Peoria County, IL, Tazewell County, IL, Woodford County, IL, Brown County, IL, Cass County, IL, Morgan County, IL, Schuyler County, IL, Fulton County, IL, Mason County, IL 7:00 PM

Cass County, Illinois, United States

Last updated: 4:56 PM CDT  ·  Refresh
25°C
Feels like 27°
Overcast
▲ 26°  /  ▼ 15°
Wind
2 mph WNW
Humidity
59%
Dew Point
16°
Pressure
29.51 inHg
Visibility
10 mi
UV Index
3.7
Cloud Cover
86%
Sunrise
5:33 AM
Sunset
8:33 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Cass County is currently overcast at 25°C. Precipitation is likely — peak probability 51% around 4 PM. Atmospheric instability is elevated (CAPE up to 832 J/kg) — isolated convective development possible. Sunrise: 5:33AM · Sunset: 8:33PM.

Alerts

Flood Warning
Brown County, IL, Cass County, IL, Morgan County, IL, Schuyler County, IL
Expires
Flood Warning
Peoria County, IL, Tazewell County, IL, Woodford County, IL, Brown County, IL, Cass County, IL, Morgan County, IL, Schuyler County, IL, Fulton County, IL, Mason County, IL
Expires
Flood Warning
Fulton County, IL, Knox County, IL, Piatt County, IL, Cass County, IL, Mason County, IL
Expires 2:30 PM
Flood Warning
Piatt County, IL, Cass County, IL, Mason County, IL
Expires 7:00 AM
Flood Warning
Cass County, IL, Mason County, IL
Expires 7:00 AM
Flood Warning
Marshall County, IL, Putnam County, IL, Peoria County, IL, Tazewell County, IL, Woodford County, IL, Brown County, IL, Cass County, IL, Morgan County, IL, Schuyler County, IL, Fulton County, IL, Mason County, IL
Expires 7:00 PM
39 AQI · Good Dominant: O3 Air Quality
Hourly Forecast · Next 24 Hours
Now
25°
3%
5 PM
26°
23%
6 PM
24°
23%
7 PM
23°
23%
8 PM
22°
23%
9 PM
20°
23%
10 PM
19°
23%
11 PM
18°
23%
12 AM
18°
16%
1 AM
17°
5%
2 AM
17°
10%
3 AM
17°
14%
4 AM
17°
15%
5 AM
16°
15%
6 AM
17°
15%
7 AM
18°
34%
8 AM
19°
39%
9 AM
20°
39%
10 AM
21°
49%
11 AM
22°
45%
12 PM
22°
41%
1 PM
26°
41%
2 PM
26°
44%
3 PM
26°
44%
7-Day Forecast
Today
26° 15°
Rain, 23% chance.
Wed
29° 16°
Rain, 50% chance.
Thu
29° 18°
Rain, 74% chance.
Fri
25° 18°
Rain, 90% chance.
Sat
31° 19°
Drizzle, 82% chance.
Sun
33° 21°
Clear with a 53% chance of rain.
Mon
34° 23°
Clear with a 24% chance of rain.
TimeTempConditionsPrecipWindHumidity
Now 25° Overcast 3% 2 mph WNW 59%
5 PM 26° Mostly Cloudy 23% 1 mph NE 64%
6 PM 24° Rain 23% 3 mph E 68%
7 PM 23° Rain 23% 3 mph SE 75%
8 PM 22° Rain 23% 4 mph SE 78%
9 PM 20° Rain 23% 5 mph SE 81%
10 PM 19° Rain 23% 5 mph SE 82%
11 PM 18° Rain 23% 5 mph SSE 84%
12 AM 18° Drizzle 16% 6 mph SSE 85%
1 AM 17° Partly Cloudy 5% 6 mph SSE 85%
2 AM 17° Partly Cloudy 10% 6 mph SSE 86%
3 AM 17° Partly Cloudy 14% 6 mph SSE 86%
4 AM 17° Partly Cloudy 15% 6 mph SSE 85%
5 AM 16° Partly Cloudy 15% 6 mph SSE 84%
6 AM 17° Mostly Cloudy 15% 7 mph S 83%
7 AM 18° Drizzle 34% 9 mph S 79%
8 AM 19° Drizzle 39% 10 mph S 77%
9 AM 20° Drizzle 39% 11 mph S 75%
10 AM 21° Drizzle 49% 10 mph S 76%
11 AM 22° Drizzle 45% 10 mph SSW 77%
12 PM 22° Drizzle 41% 10 mph SSW 78%
1 PM 26° Drizzle 41% 10 mph SSW 79%
2 PM 26° Rain 44% 9 mph SSW 80%
3 PM 26° Rain 44% 9 mph SSW 81%
15-Day Forecast
Today
6/23
Rain
23%
15°
26°
Wed
6/24
Rain
50%
16°
29°
Thu
6/25
Rain
74%
18°
29°
Fri
6/26
Rain
90%
18°
25°
Sat
6/27
Drizzle
82%
19°
31°
Sun
6/28
Clear
53%
21°
33°
Mon
6/29
Clear
24%
23°
34°
Tue
6/30
Clear
38%
23°
34°
Wed
7/1
Thunderstorm
66%
23°
34°
Thu
7/2
Drizzle
63%
23°
33°
Fri
7/3
Clear
47%
23°
30°
Sat
7/4
Drizzle
66%
21°
32°
Sun
7/5
Drizzle
66%
20°
31°
Mon
7/6
Drizzle
66%
19°
30°
Tue
7/7
Drizzle
66%
19°
31°
39
Good
U.S. Air Quality Index · Dominant: O3
50 100 150 200

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

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
31 AQI 5.6 µg/m³
O3
Ground-level ozone
Dominant
39 AQI 42 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Wed 39 Good 39 31
Thu 40 Good 40 34
Fri 36 Good 36 14
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 Tue Jun 23, 20:00'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
SBCAPE120 J/kg
MLCAPE33 J/kg
MUCAPE120 J/kg
SBCIN-0 J/kg
MLCIN-0 J/kg
Lifted Index1.1
Kinematics
0–6 km Shear31 kt
0–1 km Shear2 kt
Eff. Shear20 kt
0–1 km SRH-7
0–3 km SRH-77
Eff. SRH-77
Storm Motion253° @ 19 kt
0–1 km EHI-0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index23.9
Thermo & Levels
PWAT1.20 in
0–3 km LR6.9 °C/km
700–500 LR5.1 °C/km
Total Totals39.7
LCL872 hPa
LFC955 hPa
EL390 hPa
Freezing Lvl13,780 ft