Severe Thunderstorm Watch 10:00 PM Severe Thunderstorm Watch 10:00 PM Flood Warning — Cass County, IL, Fulton County, IL, Mason County, IL

Fulton County, Illinois, United States

Last updated: 9:10 PM CDT  ·  Refresh
24°C
Feels like 27°
Clear
▲ 29°  /  ▼ 16°
Wind
5 mph WSW
Humidity
88%
Dew Point
22°
Pressure
29.29 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
2%
Sunrise
6:17 AM
Sunset
7:49 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Fulton County is currently clear at 24°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 2137 J/kg) — isolated convective development possible. Sunrise: 6:17AM · Sunset: 7:49PM.

Alerts

Severe Thunderstorm Watch
Expires 10:00 PM
Severe Thunderstorm Watch
Expires 10:00 PM
Flood Warning
Cass County, IL, Fulton County, IL, Mason County, IL
Expires
35 AQI · Good Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
24°
16%
10 PM
23°
24%
11 PM
22°
37%
12 AM
22°
9%
1 AM
21°
3%
2 AM
20°
3%
3 AM
19°
3%
4 AM
19°
3%
5 AM
17°
3%
6 AM
17°
3%
7 AM
17°
3%
8 AM
18°
3%
9 AM
21°
5%
10 AM
23°
5%
11 AM
24°
5%
12 PM
25°
5%
1 PM
26°
5%
2 PM
26°
5%
3 PM
27°
5%
4 PM
27°
5%
5 PM
27°
5%
6 PM
26°
3%
7 PM
25°
3%
8 PM
23°
3%
7-Day Forecast
Tonight
29° 16°
Clear.
Sat
27° 17°
Clear.
Sun
26° 12°
Clear.
Mon
24° 14°
Mostly Cloudy with a 54% chance of rain.
Tue
26° 14°
Clear with a 64% chance of rain.
Wed
28° 17°
Thunderstorm, 64% chance.
Thu
28° 18°
Clear with a 33% chance of rain.
TimeTempConditionsPrecipWindHumidity
Now 24° Clear 16% 5 mph WSW 88%
10 PM 23° Mostly Clear 24% 5 mph W 89%
11 PM 22° Partly Cloudy 37% 6 mph WNW 90%
12 AM 22° Mostly Clear 9% 6 mph NW 92%
1 AM 21° Clear 3% 7 mph NNW 92%
2 AM 20° Clear 3% 6 mph NNW 91%
3 AM 19° Clear 3% 6 mph NW 91%
4 AM 19° Clear 3% 6 mph NW 91%
5 AM 17° Clear 3% 6 mph NW 91%
6 AM 17° Clear 3% 6 mph NW 91%
7 AM 17° Clear 3% 7 mph NW 90%
8 AM 18° Clear 3% 7 mph NW 84%
9 AM 21° Clear 5% 7 mph NW 78%
10 AM 23° Clear 5% 8 mph NW 72%
11 AM 24° Clear 5% 9 mph NW 67%
12 PM 25° Clear 5% 10 mph NW 64%
1 PM 26° Clear 5% 12 mph NW 60%
2 PM 26° Mostly Clear 5% 12 mph NW 60%
3 PM 27° Mostly Clear 5% 12 mph NW 60%
4 PM 27° Mostly Clear 5% 11 mph NW 61%
5 PM 27° Mostly Clear 5% 10 mph NW 65%
6 PM 26° Mostly Clear 3% 9 mph NW 69%
7 PM 25° Clear 3% 9 mph NW 70%
8 PM 23° Clear 3% 8 mph NNW 72%
15-Day Forecast
Today
8/21
Clear
16%
16°
29°
Sat
8/22
Clear
9%
17°
27°
Sun
8/23
Clear
3%
12°
26°
Mon
8/24
Mostly Cloudy
54%
14°
24°
Tue
8/25
Clear
64%
14°
26°
Wed
8/26
Thunderstorm
64%
17°
28°
Thu
8/27
Clear
33%
18°
28°
Fri
8/28
Drizzle
53%
17°
27°
Sat
8/29
Thunderstorm
68%
17°
30°
Sun
8/30
Drizzle
68%
20°
32°
Mon
8/31
Drizzle
60%
20°
32°
Tue
9/1
Drizzle
60%
20°
31°
Wed
9/2
Drizzle
60%
19°
29°
Thu
9/3
Drizzle
60%
18°
28°
Fri
9/4
Clear
60%
18°
29°
35
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
35 AQI 6.3 µg/m³
O3
Ground-level ozone
32 AQI 35 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 35 Good 32 35
Sun 32 Good 32 31
Mon 26 Good 26 11
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 Fri Aug 21, 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
SBCAPE2291 J/kg
MLCAPE2387 J/kg
MUCAPE2619 J/kg
SBCIN-114 J/kg
MLCIN-38 J/kg
Lifted Index-6.1
Kinematics
0–6 km Shear28 kt
0–1 km Shear18 kt
Eff. Shear28 kt
0–1 km SRH136
0–3 km SRH182
Eff. SRH182
Storm Motion339° @ 24 kt
0–1 km EHI2.0
Composite Parameters
Sig. Tornado1.0
STP (eff)1.4
Supercell6.9
K-Index32.1
Thermo & Levels
PWAT1.48 in
0–3 km LR5.7 °C/km
700–500 LR6.4 °C/km
Total Totals52.8
LCL962 hPa
LFC848 hPa
EL203 hPa
Freezing Lvl13,199 ft