Frost Advisory — Louisa, IA, Henry, IA, Des Moines, IA, Van Buren, IA, Lee, IA, Henry, IL, Bureau, IL, Putnam, IL, Mercer, IL, Henderson, IL, Warren, IL, Hancock, IL, McDonough, IL, Scotland, MO, Clark, MO 9:00 AM

Mercer County, Illinois, United States

Last updated: 8:24 PM CDT  ·  Refresh
8°C
Feels like 5°
Mostly Clear
▲ 11°  /  ▼ 2°
Wind
11 mph NNW
Humidity
74%
Dew Point
4°
Pressure
29.66 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
23%
Sunrise
7:14 AM
Sunset
6:20 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Mercer County is currently mostly clear at 8°C. Dry conditions are expected through the next 24 hours. Sunrise: 7:14AM · Sunset: 6:20PM.

Alerts

Frost Advisory
Louisa, IA, Henry, IA, Des Moines, IA, Van Buren, IA, Lee, IA, Henry, IL, Bureau, IL, Putnam, IL, Mercer, IL, Henderson, IL, Warren, IL, Hancock, IL, McDonough, IL, Scotland, MO, Clark, MO
Expires 9:00 AM
22 AQI · Good Dominant: O3 Air Quality
Hourly Forecast · Next 24 Hours
Now
8°
12%
9 PM
8°
6%
10 PM
7°
6%
11 PM
6°
4%
12 AM
6°
4%
1 AM
5°
3%
2 AM
4°
3%
3 AM
4°
3%
4 AM
3°
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
10°
3%
1 PM
13°
3%
2 PM
13°
3%
3 PM
14°
3%
4 PM
13°
3%
5 PM
11°
3%
6 PM
11°
3%
7 PM
9°
3%
7-Day Forecast
Tonight
11° 2°
Mostly Clear.
Sat
14° 2°
Clear.
Sun
18° 4°
Clear.
Mon
22° 6°
Partly Cloudy.
Tue
23° 9°
Partly Cloudy.
Wed
24° 11°
Mostly Clear.
Thu
26° 12°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 8° Mostly Clear 12% 11 mph NNW 74%
9 PM 8° Mostly Clear 6% 10 mph NNW 74%
10 PM 7° Clear 6% 10 mph N 75%
11 PM 6° Clear 4% 9 mph N 77%
12 AM 6° Clear 4% 8 mph N 80%
1 AM 5° Clear 3% 7 mph N 81%
2 AM 4° Clear 3% 6 mph N 83%
3 AM 4° Clear 3% 5 mph N 84%
4 AM 3° Clear 3% 5 mph N 84%
5 AM 2° Clear 3% 4 mph N 84%
6 AM 2° Clear 3% 3 mph NNW 84%
7 AM 2° Mostly Clear 3% 3 mph NW 82%
8 AM 3° Mostly Clear 3% 2 mph WNW 77%
9 AM 6° Mostly Clear 3% 2 mph SW 69%
10 AM 8° Clear 3% 3 mph SSW 62%
11 AM 9° Clear 3% 4 mph SSW 54%
12 PM 10° Clear 3% 5 mph SW 49%
1 PM 13° Clear 3% 6 mph SW 46%
2 PM 13° Clear 3% 6 mph SW 44%
3 PM 14° Clear 3% 7 mph SW 43%
4 PM 13° Clear 3% 7 mph SW 44%
5 PM 11° Clear 3% 6 mph SSW 47%
6 PM 11° Clear 3% 6 mph SSW 51%
7 PM 9° Clear 3% 6 mph SSW 54%
15-Day Forecast
Today
10/16
Mostly Clear
12%
2°
11°
Sat
10/17
Clear
3%
2°
14°
Sun
10/18
Clear
3%
4°
18°
Mon
10/19
Partly Cloudy
3%
6°
22°
Tue
10/20
Partly Cloudy
5%
9°
23°
Wed
10/21
Mostly Clear
9%
11°
24°
Thu
10/22
Clear
10%
12°
26°
Fri
10/23
Clear
3%
13°
27°
Sat
10/24
Mostly Cloudy
15%
13°
26°
Sun
10/25
Mostly Cloudy
35%
11°
22°
Mon
10/26
Overcast
60%
9°
20°
Tue
10/27
Clear
60%
8°
19°
Wed
10/28
Drizzle
60%
8°
19°
Thu
10/29
Drizzle
60%
9°
19°
Fri
10/30
Drizzle
60%
9°
19°
22
Good
U.S. Air Quality Index · Dominant: O3
50 100 150 200

Air quality is satisfactory and poses little or no health risk.

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
20 AQI 3.7 µg/m³
O3
Ground-level ozone
Dominant
22 AQI 25 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 22 Good 22 20
Sun 26 Good 26 8
Mon 31 Good 31 21
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
MLCAPE3 J/kg
MUCAPE11 J/kg
SBCIN—
MLCIN0 J/kg
Lifted Index14.5
Kinematics
0–6 km Shear48 kt
0–1 km Shear21 kt
Eff. Shear—
0–1 km SRH97
0–3 km SRH122
Eff. SRH—
Storm Motion26° @ 40 kt
0–1 km EHI0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)—
Supercell—
K-Index-11.2
Thermo & Levels
PWAT0.39 in
0–3 km LR5.1 °C/km
700–500 LR4.4 °C/km
Total Totals32.0
LCL939 hPa
LFC—
EL—
Freezing Lvl4,206 ft