Frost Advisory — Greene, IL, Macoupin, IL, Montgomery, IL, Adams, IL, Brown, IL, Pike, IL, Calhoun, IL, Jersey, IL, Knox, MO, Lewis, MO, Shelby, MO, Marion, MO, Monroe, MO, Ralls, MO, Pike, MO, Audrain, MO, Lincoln, MO 9:00 AM

Shelby County, Missouri, United States

Last updated: 8:26 PM CDT  ·  Refresh
9°C
Feels like 6°
Partly Cloudy
▲ 12°  /  ▼ 1°
Wind
12 mph NNW
Humidity
66%
Dew Point
3°
Pressure
29.64 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
45%
Sunrise
7:18 AM
Sunset
6:27 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Shelby County is currently partly cloudy at 9°C. Dry conditions are expected through the next 24 hours. Sunrise: 7:18AM · Sunset: 6:27PM.

Alerts

Frost Advisory
Greene, IL, Macoupin, IL, Montgomery, IL, Adams, IL, Brown, IL, Pike, IL, Calhoun, IL, Jersey, IL, Knox, MO, Lewis, MO, Shelby, MO, Marion, MO, Monroe, MO, Ralls, MO, Pike, MO, Audrain, MO, Lincoln, MO
Expires 9:00 AM
23 AQI · Good Dominant: O3 Air Quality
Hourly Forecast · Next 24 Hours
Now
9°
9%
9 PM
8°
4%
10 PM
7°
4%
11 PM
6°
4%
12 AM
6°
3%
1 AM
5°
3%
2 AM
4°
3%
3 AM
4°
3%
4 AM
3°
3%
5 AM
2°
3%
6 AM
1°
3%
7 AM
1°
3%
8 AM
3°
3%
9 AM
6°
3%
10 AM
8°
3%
11 AM
9°
3%
12 PM
11°
3%
1 PM
14°
3%
2 PM
14°
3%
3 PM
15°
3%
4 PM
14°
3%
5 PM
12°
3%
6 PM
11°
3%
7 PM
10°
3%
7-Day Forecast
Tonight
12° 1°
Partly Cloudy.
Sat
15° 1°
Clear.
Sun
21° 3°
Clear.
Mon
23° 4°
Clear.
Tue
26° 8°
Partly Cloudy.
Wed
27° 11°
Mostly Clear.
Thu
28° 11°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 9° Partly Cloudy 9% 12 mph NNW 66%
9 PM 8° Mostly Clear 4% 11 mph N 68%
10 PM 7° Clear 4% 10 mph NNW 70%
11 PM 6° Clear 4% 9 mph N 72%
12 AM 6° Clear 3% 8 mph N 75%
1 AM 5° Clear 3% 8 mph N 78%
2 AM 4° Clear 3% 7 mph N 81%
3 AM 4° Clear 3% 6 mph NNW 84%
4 AM 3° Clear 3% 6 mph N 86%
5 AM 2° Clear 3% 5 mph N 88%
6 AM 1° Clear 3% 4 mph N 89%
7 AM 1° Clear 3% 3 mph N 86%
8 AM 3° Clear 3% 2 mph N 78%
9 AM 6° Clear 3% 2 mph ENE 69%
10 AM 8° Clear 3% 2 mph E 60%
11 AM 9° Clear 3% 2 mph SE 52%
12 PM 11° Clear 3% 2 mph S 45%
1 PM 14° Clear 3% 2 mph SSW 40%
2 PM 14° Clear 3% 3 mph SSW 38%
3 PM 15° Clear 3% 3 mph SSW 36%
4 PM 14° Clear 3% 4 mph SSW 36%
5 PM 12° Clear 3% 4 mph S 39%
6 PM 11° Clear 3% 4 mph S 42%
7 PM 10° Clear 3% 4 mph S 44%
15-Day Forecast
Today
10/16
Partly Cloudy
9%
1°
12°
Sat
10/17
Clear
3%
1°
15°
Sun
10/18
Clear
3%
3°
21°
Mon
10/19
Clear
3%
4°
23°
Tue
10/20
Partly Cloudy
10%
8°
26°
Wed
10/21
Mostly Clear
9%
11°
27°
Thu
10/22
Clear
10%
11°
28°
Fri
10/23
Mostly Clear
3%
13°
29°
Sat
10/24
Mostly Cloudy
27%
13°
28°
Sun
10/25
Drizzle
54%
11°
23°
Mon
10/26
Mostly Cloudy
60%
8°
22°
Tue
10/27
Clear
60%
8°
21°
Wed
10/28
Drizzle
60%
7°
21°
Thu
10/29
Drizzle
60%
8°
21°
Fri
10/30
Drizzle
60%
9°
21°
23
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
16 AQI 2.9 µg/m³
O3
Ground-level ozone
Dominant
23 AQI 26 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 23 Good 23 16
Sun 29 Good 29 9
Mon 30 Good 30 26
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
MUCAPE9 J/kg
SBCIN—
MLCIN0 J/kg
Lifted Index16.3
Kinematics
0–6 km Shear49 kt
0–1 km Shear22 kt
Eff. Shear—
0–1 km SRH96
0–3 km SRH107
Eff. SRH—
Storm Motion23° @ 43 kt
0–1 km EHI0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)—
Supercell—
K-Index-14.2
Thermo & Levels
PWAT0.38 in
0–3 km LR5.0 °C/km
700–500 LR4.1 °C/km
Total Totals28.2
LCL917 hPa
LFC—
EL—
Freezing Lvl3,947 ft