Areal Flood Watch 10:00 PM

Mercer County, Illinois, United States

Last updated: 8:17 PM CDT  ·  Refresh
25°C
Feels like 28°
Mostly Clear
▲ 28°  /  ▼ 19°
Wind
6 mph NE
Humidity
86%
Dew Point
21°
Pressure
29.20 inHg
Visibility
10 mi
UV Index
0.9
Cloud Cover
27%
Sunrise
5:35 AM
Sunset
8:39 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Mercer County is currently mostly clear at 25°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 1336 J/kg) — isolated convective development possible. Sunrise: 5:35AM · Sunset: 8:39PM.

Alerts

Areal Flood Watch
Expires 10:00 PM
47 AQI · Good Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
25°
16%
9 PM
23°
25%
10 PM
22°
26%
11 PM
22°
25%
12 AM
21°
29%
1 AM
21°
17%
2 AM
21°
16%
3 AM
21°
20%
4 AM
21°
19%
5 AM
19°
34%
6 AM
20°
16%
7 AM
20°
16%
8 AM
21°
19%
9 AM
23°
19%
10 AM
24°
19%
11 AM
25°
8%
12 PM
26°
9%
1 PM
27°
9%
2 PM
28°
15%
3 PM
29°
15%
4 PM
29°
28%
5 PM
28°
28%
6 PM
28°
36%
7 PM
27°
36%
7-Day Forecast
Tonight
28° 19°
Mostly Clear with a 25% chance of rain.
Sun
29° 19°
Mostly Cloudy with a 40% chance of rain.
Mon
29° 17°
Mostly Clear.
Tue
29° 17°
Partly Cloudy.
Wed
29° 18°
Rain, 72% chance.
Thu
26° 18°
Rain, 77% chance.
Fri
27° 17°
Drizzle, 52% chance.
TimeTempConditionsPrecipWindHumidity
Now 25° Mostly Clear 16% 6 mph NE 86%
9 PM 23° Mostly Cloudy 25% 5 mph E 89%
10 PM 22° Overcast 26% 4 mph ESE 91%
11 PM 22° Mostly Cloudy 25% 2 mph ESE 93%
12 AM 21° Mostly Cloudy 29% 2 mph N 95%
1 AM 21° Overcast 17% 2 mph N 96%
2 AM 21° Overcast 16% 4 mph ENE 96%
3 AM 21° Overcast 20% 4 mph ENE 96%
4 AM 21° Overcast 19% 3 mph NE 96%
5 AM 19° Mostly Cloudy 34% 3 mph NNE 95%
6 AM 20° Mostly Cloudy 16% 3 mph NE 95%
7 AM 20° Mostly Cloudy 16% 3 mph NE 94%
8 AM 21° Mostly Cloudy 19% 5 mph NE 90%
9 AM 23° Overcast 19% 6 mph NE 86%
10 AM 24° Overcast 19% 6 mph NNE 82%
11 AM 25° Overcast 8% 7 mph NNE 78%
12 PM 26° Mostly Cloudy 9% 7 mph NNE 74%
1 PM 27° Mostly Cloudy 9% 8 mph NNE 72%
2 PM 28° Mostly Cloudy 15% 8 mph NNE 72%
3 PM 29° Partly Cloudy 15% 8 mph NNE 71%
4 PM 29° Partly Cloudy 28% 8 mph NNE 71%
5 PM 28° Partly Cloudy 28% 8 mph NNE 74%
6 PM 28° Partly Cloudy 36% 8 mph NNE 76%
7 PM 27° Mostly Cloudy 36% 8 mph NNE 78%
15-Day Forecast
Today
7/4
Mostly Clear
25%
19°
28°
Sun
7/5
Mostly Cloudy
40%
19°
29°
Mon
7/6
Mostly Clear
6%
17°
29°
Tue
7/7
Partly Cloudy
14%
17°
29°
Wed
7/8
Rain
72%
18°
29°
Thu
7/9
Rain
77%
18°
26°
Fri
7/10
Drizzle
52%
17°
27°
Sat
7/11
Rain
53%
16°
26°
Sun
7/12
Drizzle
43%
12°
26°
Mon
7/13
Drizzle
44%
14°
27°
Tue
7/14
Clear
12%
19°
29°
Wed
7/15
Drizzle
60%
19°
29°
Thu
7/16
Drizzle
60%
19°
28°
Fri
7/17
Drizzle
60%
19°
29°
Sat
7/18
Drizzle
60%
19°
28°
47
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
47 AQI 8.5 µg/m³
O3
Ground-level ozone
43 AQI 46 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 47 Good 43 47
Mon 38 Good 37 38
Tue 52 Moderate 31 52
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 Sat Jul 4, 23:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE999 J/kg
MLCAPE970 J/kg
MUCAPE1504 J/kg
SBCIN-48 J/kg
MLCIN0 J/kg
Lifted Index-4.0
Kinematics
0–6 km Shear21 kt
0–1 km Shear10 kt
Eff. Shear21 kt
0–1 km SRH-24
0–3 km SRH-27
Eff. SRH-27
Storm Motion220° @ 6 kt
0–1 km EHI-0.2
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index29.9
Thermo & Levels
PWAT1.65 in
0–3 km LR5.8 °C/km
700–500 LR5.8 °C/km
Total Totals45.0
LCL939 hPa
LFC782 hPa
EL215 hPa
Freezing Lvl13,953 ft