Frost Advisory — Knox, IL, Stark, IL, Peoria, IL, Marshall, IL, Woodford, IL, Fulton, IL, Tazewell, IL, Schuyler, IL, Mason, IL, Logan, IL, Cass, IL, Menard, IL, Scott, IL, Morgan, IL, Sangamon, IL, Christian, IL 9:00 AM

Cass County, Illinois, United States

Last updated: 8:25 PM CDT  ·  Refresh
9°C
Feels like 7°
Partly Cloudy
▲ 12°  /  ▼ 2°
Wind
14 mph NNW
Humidity
77%
Dew Point
6°
Pressure
29.73 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
58%
Sunrise
7:11 AM
Sunset
6:19 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Cass County is currently partly cloudy at 10°C. Dry conditions are expected through the next 24 hours. Sunrise: 7:11AM · Sunset: 6:19PM.

Alerts

Frost Advisory
Knox, IL, Stark, IL, Peoria, IL, Marshall, IL, Woodford, IL, Fulton, IL, Tazewell, IL, Schuyler, IL, Mason, IL, Logan, IL, Cass, IL, Menard, IL, Scott, IL, Morgan, IL, Sangamon, IL, Christian, IL
Expires 9:00 AM
24 AQI · Good Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
9°
12%
9 PM
8°
6%
10 PM
8°
4%
11 PM
8°
4%
12 AM
7°
4%
1 AM
6°
3%
2 AM
6°
3%
3 AM
5°
3%
4 AM
4°
3%
5 AM
2°
3%
6 AM
2°
3%
7 AM
2°
3%
8 AM
3°
3%
9 AM
6°
3%
10 AM
8°
3%
11 AM
9°
3%
12 PM
11°
3%
1 PM
13°
3%
2 PM
14°
3%
3 PM
14°
3%
4 PM
14°
3%
5 PM
12°
3%
6 PM
12°
3%
7 PM
11°
3%
7-Day Forecast
Tonight
12° 2°
Partly Cloudy.
Sat
14° 2°
Clear.
Sun
20° 3°
Clear.
Mon
24° 4°
Clear.
Tue
26° 8°
Partly Cloudy.
Wed
27° 9°
Partly Cloudy.
Thu
28° 10°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 9° Partly Cloudy 12% 14 mph NNW 77%
9 PM 8° Partly Cloudy 6% 12 mph NNW 77%
10 PM 8° Mostly Clear 4% 11 mph NNW 77%
11 PM 8° Mostly Clear 4% 11 mph N 76%
12 AM 7° Clear 4% 10 mph N 77%
1 AM 6° Clear 3% 9 mph N 79%
2 AM 6° Clear 3% 8 mph N 81%
3 AM 5° Clear 3% 8 mph N 83%
4 AM 4° Clear 3% 7 mph N 84%
5 AM 2° Clear 3% 6 mph N 86%
6 AM 2° Mostly Clear 3% 6 mph N 86%
7 AM 2° Mostly Clear 3% 5 mph N 84%
8 AM 3° Clear 3% 4 mph N 76%
9 AM 6° Clear 3% 4 mph NNE 67%
10 AM 8° Clear 3% 4 mph NE 59%
11 AM 9° Clear 3% 3 mph NE 53%
12 PM 11° Clear 3% 2 mph E 47%
1 PM 13° Clear 3% 2 mph SE 42%
2 PM 14° Clear 3% 2 mph S 39%
3 PM 14° Clear 3% 2 mph SSW 37%
4 PM 14° Clear 3% 3 mph SSW 37%
5 PM 12° Clear 3% 3 mph SSW 40%
6 PM 12° Clear 3% 3 mph S 42%
7 PM 11° Clear 3% 3 mph S 44%
15-Day Forecast
Today
10/16
Partly Cloudy
12%
2°
12°
Sat
10/17
Clear
3%
2°
14°
Sun
10/18
Clear
3%
3°
20°
Mon
10/19
Clear
3%
4°
24°
Tue
10/20
Partly Cloudy
3%
8°
26°
Wed
10/21
Partly Cloudy
9%
9°
27°
Thu
10/22
Clear
9%
10°
28°
Fri
10/23
Clear
3%
12°
29°
Sat
10/24
Overcast
15%
12°
29°
Sun
10/25
Drizzle
54%
11°
24°
Mon
10/26
Drizzle
60%
9°
22°
Tue
10/27
Drizzle
60%
8°
21°
Wed
10/28
Drizzle
60%
8°
21°
Thu
10/29
Drizzle
60%
9°
22°
Fri
10/30
Drizzle
60%
9°
22°
24
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
24 AQI 4.4 µg/m³
O3
Ground-level ozone
21 AQI 24 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 24 Good 21 24
Sun 29 Good 29 6
Mon 30 Good 30 25
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 LCL0°C Temperature (°C) Pressure (hPa)
Temp Dewpoint Parcel (SB) CAPE CIN Dry adiabat Moist adiabat Mixing ratio
RAP
Valid Fri Oct 16, 23:00'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
SBCAPE0 J/kg
MLCAPE9 J/kg
MUCAPE38 J/kg
SBCIN—
MLCIN-38 J/kg
Lifted Index12.1
Kinematics
0–6 km Shear55 kt
0–1 km Shear26 kt
Eff. Shear—
0–1 km SRH111
0–3 km SRH110
Eff. SRH—
Storm Motion24° @ 37 kt
0–1 km EHI0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)—
Supercell—
K-Index9.4
Thermo & Levels
PWAT0.52 in
0–3 km LR6.0 °C/km
700–500 LR4.0 °C/km
Total Totals34.2
LCL954 hPa
LFC—
EL—
Freezing Lvl4,626 ft