Heat Advisory — Knox, IL, Stark, IL, Peoria, IL, Fulton, IL, Tazewell, IL, Schuyler, IL, Mason, IL, Logan, IL, De Witt, IL, Piatt, IL, Cass, IL, Menard, IL, Scott, IL, Morgan, IL, Sangamon, IL, Christian, IL, Macon, IL, Moultrie, IL, Douglas, IL, Coles, IL, Shelby, IL, Cumberland, IL, Clark, IL, Effingham, IL, Jasper, IL, Crawford, IL, Clay, IL, Richland, IL, Lawrence, IL, Marshall, IL, Woodford, IL, McLean, IL, Champaign, IL, Vermilion, IL, Edgar, IL 7:00 PM

Marshall County, Illinois, United States

Last updated: 11:45 PM CDT  ·  Refresh
26°C
Feels like 27°
Mostly Clear
▲ 30°  /  ▼ 22°
Wind
8 mph SSW
Humidity
68%
Dew Point
21°
Pressure
29.23 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
11%
Sunrise
6:23 AM
Sunset
7:31 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Marshall County is currently mostly clear at 26°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 2809 J/kg) — isolated convective development possible. Sunrise: 6:23AM · Sunset: 7:31PM.

Alerts

Heat Advisory
Knox, IL, Stark, IL, Peoria, IL, Fulton, IL, Tazewell, IL, Schuyler, IL, Mason, IL, Logan, IL, De Witt, IL, Piatt, IL, Cass, IL, Menard, IL, Scott, IL, Morgan, IL, Sangamon, IL, Christian, IL, Macon, IL, Moultrie, IL, Douglas, IL, Coles, IL, Shelby, IL, Cumberland, IL, Clark, IL, Effingham, IL, Jasper, IL, Crawford, IL, Clay, IL, Richland, IL, Lawrence, IL, Marshall, IL, Woodford, IL, McLean, IL, Champaign, IL, Vermilion, IL, Edgar, IL
Expires 7:00 PM
61 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
26°
8%
12 AM
26°
8%
1 AM
26°
8%
2 AM
25°
8%
3 AM
24°
8%
4 AM
23°
8%
5 AM
23°
8%
6 AM
23°
8%
7 AM
24°
18%
8 AM
26°
17%
9 AM
28°
5%
10 AM
29°
5%
11 AM
31°
3%
12 PM
32°
3%
1 PM
33°
3%
2 PM
34°
3%
3 PM
34°
3%
4 PM
33°
3%
5 PM
33°
3%
6 PM
32°
3%
7 PM
31°
3%
8 PM
31°
3%
9 PM
29°
3%
10 PM
28°
3%
7-Day Forecast
Tonight
30° 22°
Mostly Clear.
Tue
34° 22°
Partly Cloudy.
Wed
36° 23°
Clear.
Thu
34° 23°
Mostly Clear with a 52% chance of rain.
Fri
35° 23°
Fog with a 44% chance of rain.
Sat
35° 22°
Clear.
Sun
33° 20°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 26° Mostly Clear 8% 8 mph SSW 68%
12 AM 26° Clear 8% 9 mph SSW 63%
1 AM 26° Partly Cloudy 8% 9 mph SW 67%
2 AM 25° Partly Cloudy 8% 8 mph SW 70%
3 AM 24° Mostly Clear 8% 8 mph SW 73%
4 AM 23° Mostly Clear 8% 7 mph SW 77%
5 AM 23° Mostly Clear 8% 7 mph SW 79%
6 AM 23° Partly Cloudy 8% 7 mph SW 81%
7 AM 24° Partly Cloudy 18% 8 mph SW 79%
8 AM 26° Partly Cloudy 17% 8 mph SW 74%
9 AM 28° Partly Cloudy 5% 8 mph SW 69%
10 AM 29° Partly Cloudy 5% 8 mph WSW 65%
11 AM 31° Partly Cloudy 3% 8 mph SW 61%
12 PM 32° Partly Cloudy 3% 8 mph SW 57%
1 PM 33° Partly Cloudy 3% 9 mph WSW 54%
2 PM 34° Partly Cloudy 3% 9 mph WSW 52%
3 PM 34° Partly Cloudy 3% 9 mph WSW 50%
4 PM 33° Partly Cloudy 3% 8 mph SW 54%
5 PM 33° Partly Cloudy 3% 6 mph SW 60%
6 PM 32° Mostly Clear 3% 6 mph SW 65%
7 PM 31° Mostly Clear 3% 6 mph SW 68%
8 PM 31° Mostly Clear 3% 7 mph SSW 70%
9 PM 29° Mostly Clear 3% 8 mph SSW 72%
10 PM 28° Mostly Clear 3% 8 mph SSW 72%
15-Day Forecast
Today
8/31
Mostly Clear
8%
22°
30°
Tue
9/1
Partly Cloudy
17%
22°
34°
Wed
9/2
Clear
7%
23°
36°
Thu
9/3
Mostly Clear
52%
23°
34°
Fri
9/4
Fog
44%
23°
35°
Sat
9/5
Clear
19%
22°
35°
Sun
9/6
Clear
19%
20°
33°
Mon
9/7
Clear
19%
19°
32°
Tue
9/8
Drizzle
60%
17°
32°
Wed
9/9
Drizzle
60%
18°
34°
Thu
9/10
Drizzle
60%
17°
31°
Fri
9/11
Drizzle
60%
18°
29°
Sat
9/12
Drizzle
60%
16°
27°
Sun
9/13
Drizzle
60%
15°
27°
Mon
9/14
Drizzle
60%
16°
26°
61
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
61 AQI 14.6 µg/m³
O3
Ground-level ozone
40 AQI 44 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 61 Moderate 40 61
Wed 62 Moderate 38 62
Thu 56 Moderate 39 56
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 Sep 1, 03:00'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
SBCAPE740 J/kg
MLCAPE822 J/kg
MUCAPE1158 J/kg
SBCIN-523 J/kg
MLCIN-298 J/kg
Lifted Index-2.7
Kinematics
0–6 km Shear32 kt
0–1 km Shear27 kt
Eff. Shear24 kt
0–1 km SRH219
0–3 km SRH207
Eff. SRH34
Storm Motion299° @ 25 kt
0–1 km EHI1.0
Composite Parameters
Sig. Tornado0.6
STP (eff)0.0
Supercell0.5
K-Index39.2
Thermo & Levels
PWAT1.89 in
0–3 km LR4.8 °C/km
700–500 LR6.7 °C/km
Total Totals49.6
LCL917 hPa
LFC627 hPa
EL193 hPa
Freezing Lvl15,315 ft