Heat Advisory — Fulton, IL, Schuyler, IL, Mason, IL, Logan, IL, Cass, IL, Menard, IL, Scott, IL, Morgan, IL, Sangamon, IL, Christian, IL, Macon, IL, Moultrie, IL, Coles, IL, Shelby, IL, Cumberland, IL, Clark, IL, Effingham, IL, Jasper, IL, Crawford, IL, Clay, IL, Richland, IL, Lawrence, IL 8:00 PM

Mason County, Illinois, United States

Last updated: 5:11 AM CDT  ·  Refresh
25°C
Feels like 27°
Mostly Clear
▲ 35°  /  ▼ 22°
Wind
7 mph SSW
Humidity
81%
Dew Point
22°
Pressure
29.38 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
21%
Sunrise
6:06 AM
Sunset
8:01 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Mason County is currently mostly clear at 25°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 3583 J/kg) — isolated convective development possible. Sunrise: 6:06AM · Sunset: 8:01PM.

Alerts

Heat Advisory
Fulton, IL, Schuyler, IL, Mason, IL, Logan, IL, Cass, IL, Menard, IL, Scott, IL, Morgan, IL, Sangamon, IL, Christian, IL, Macon, IL, Moultrie, IL, Coles, IL, Shelby, IL, Cumberland, IL, Clark, IL, Effingham, IL, Jasper, IL, Crawford, IL, Clay, IL, Richland, IL, Lawrence, IL
Expires 8:00 PM
51 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
25°
11%
6 AM
24°
27%
7 AM
24°
27%
8 AM
27°
30%
9 AM
28°
30%
10 AM
29°
25%
11 AM
31°
25%
12 PM
32°
28%
1 PM
32°
11%
2 PM
33°
14%
3 PM
33°
18%
4 PM
33°
30%
5 PM
34°
20%
6 PM
33°
20%
7 PM
32°
23%
8 PM
30°
23%
9 PM
28°
21%
10 PM
27°
16%
11 PM
26°
16%
12 AM
25°
19%
1 AM
25°
22%
2 AM
25°
29%
3 AM
25°
29%
4 AM
24°
47%
7-Day Forecast
Today
35° 22°
Partly Cloudy with a 30% chance of rain.
Wed
31° 22°
Mostly Cloudy with a 76% chance of rain.
Thu
31° 22°
Partly Cloudy with a 83% chance of rain.
Fri
28° 21°
Overcast with a 77% chance of rain.
Sat
33° 21°
Partly Cloudy with a 38% chance of rain.
Sun
32° 19°
Drizzle, 46% chance.
Mon
29° 18°
Mostly Clear.
TimeTempConditionsPrecipWindHumidity
Now 25° Mostly Clear 11% 7 mph SSW 81%
6 AM 24° Partly Cloudy 27% 8 mph SSW 77%
7 AM 24° Mostly Cloudy 27% 8 mph SSW 76%
8 AM 27° Partly Cloudy 30% 10 mph SW 70%
9 AM 28° Mostly Cloudy 30% 10 mph SW 65%
10 AM 29° Partly Cloudy 25% 11 mph SW 61%
11 AM 31° Mostly Cloudy 25% 11 mph SW 56%
12 PM 32° Mostly Cloudy 28% 12 mph SW 51%
1 PM 32° Partly Cloudy 11% 13 mph SW 48%
2 PM 33° Partly Cloudy 14% 13 mph WSW 48%
3 PM 33° Partly Cloudy 18% 13 mph WSW 48%
4 PM 33° Partly Cloudy 30% 12 mph WSW 49%
5 PM 34° Partly Cloudy 20% 11 mph WSW 50%
6 PM 33° Partly Cloudy 20% 9 mph WSW 53%
7 PM 32° Partly Cloudy 23% 7 mph SW 58%
8 PM 30° Mostly Clear 23% 5 mph SW 66%
9 PM 28° Mostly Clear 21% 6 mph S 73%
10 PM 27° Mostly Clear 16% 7 mph SSE 80%
11 PM 26° Mostly Clear 16% 6 mph SSE 84%
12 AM 25° Mostly Clear 19% 5 mph S 88%
1 AM 25° Mostly Clear 22% 5 mph SSW 90%
2 AM 25° Mostly Clear 29% 5 mph S 90%
3 AM 25° Partly Cloudy 29% 5 mph S 90%
4 AM 24° Partly Cloudy 47% 5 mph SE 90%
15-Day Forecast
Today
8/11
Partly Cloudy
30%
22°
35°
Wed
8/12
Mostly Cloudy
76%
22°
31°
Thu
8/13
Partly Cloudy
83%
22°
31°
Fri
8/14
Overcast
77%
21°
28°
Sat
8/15
Partly Cloudy
38%
21°
33°
Sun
8/16
Drizzle
46%
19°
32°
Mon
8/17
Mostly Clear
17%
18°
29°
Tue
8/18
Mostly Clear
34%
19°
32°
Wed
8/19
Thunderstorm
35%
22°
34°
Thu
8/20
Mostly Clear
35%
21°
36°
Fri
8/21
Drizzle
60%
18°
36°
Sat
8/22
Drizzle
60%
19°
32°
Sun
8/23
Drizzle
60%
18°
31°
Mon
8/24
Drizzle
60%
18°
29°
Tue
8/25
Drizzle
60%
17°
29°
51
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
51 AQI 9.3 µg/m³
O3
Ground-level ozone
40 AQI 43 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 51 Moderate 40 51
Wed 35 Good 34 35
Thu 39 Good 39 34
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 Aug 11, 08:00'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
SBCAPE1921 J/kg
MLCAPE2039 J/kg
MUCAPE2899 J/kg
SBCIN-417 J/kg
MLCIN0 J/kg
Lifted Index-6.0
Kinematics
0–6 km Shear19 kt
0–1 km Shear28 kt
Eff. Shear25 kt
0–1 km SRH236
0–3 km SRH233
Eff. SRH162
Storm Motion310° @ 21 kt
0–1 km EHI2.8
Composite Parameters
Sig. Tornado0.0
STP (eff)0.6
Supercell6.0
K-Index33.1
Thermo & Levels
PWAT1.70 in
0–3 km LR4.3 °C/km
700–500 LR7.6 °C/km
Total Totals53.2
LCL960 hPa
LFC674 hPa
EL175 hPa
Freezing Lvl14,724 ft