Severe Thunderstorm Watch 9:00 PM Severe Thunderstorm Watch 9:00 PM Flash Flood Warning — Allen County, KY, Simpson County, KY, Warren County, KY 10:00 PM Areal Flood Advisory — Logan County, KY, Simpson County, KY 10:00 PM Flash Flood Warning — Logan County, KY, Simpson County, KY 10:15 PM Flash Flood Warning — Allen County, KY, Simpson County, KY 10:45 PM

Simpson County, Kentucky, United States

Last updated: 8:27 PM CDT  ·  Refresh
26°C
Feels like 29°
Rain
▲ 33°  /  ▼ 21°
Wind
6 mph WSW
Humidity
91%
Dew Point
24°
Pressure
29.08 inHg
Visibility
2 mi
UV Index
0.0
Cloud Cover
99%
Sunrise
5:43 AM
Sunset
8:01 PM
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WeatherAI™ Analysis

WeatherAI Analysis: Simpson County is currently rain at 26°C. Precipitation is likely — peak probability 73% around 9 PM. Atmospheric instability is elevated (CAPE up to 1816 J/kg) — isolated convective development possible. Sunrise: 5:43AM · Sunset: 8:01PM.

Alerts

Severe Thunderstorm Watch
Expires 9:00 PM
Severe Thunderstorm Watch
Expires 9:00 PM
Flash Flood Warning
Allen County, KY, Simpson County, KY, Warren County, KY
Expires 10:00 PM
Areal Flood Advisory
Logan County, KY, Simpson County, KY
Expires 10:00 PM
Flash Flood Warning
Logan County, KY, Simpson County, KY
Expires 10:15 PM
Flash Flood Warning
Allen County, KY, Simpson County, KY
Expires 10:45 PM
52 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
26°
70%
9 PM
25°
72%
10 PM
25°
62%
11 PM
24°
63%
12 AM
24°
28%
1 AM
24°
3%
2 AM
23°
3%
3 AM
23°
3%
4 AM
23°
4%
5 AM
22°
5%
6 AM
21°
5%
7 AM
22°
5%
8 AM
23°
5%
9 AM
24°
5%
10 AM
26°
5%
11 AM
26°
5%
12 PM
27°
5%
1 PM
29°
5%
2 PM
29°
5%
3 PM
29°
5%
4 PM
29°
3%
5 PM
28°
3%
6 PM
27°
3%
7 PM
27°
3%
7-Day Forecast
Tonight
33° 21°
Rain, 70% chance.
Wed
30° 18°
Partly Cloudy.
Thu
28° 16°
Mostly Clear.
Fri
26° 17°
Partly Cloudy with a 60% chance of rain.
Sat
29° 19°
Mostly Cloudy with a 47% chance of rain.
Sun
33° 22°
Thunderstorm, 64% chance.
Mon
33° 23°
Clear with a 52% chance of rain.
TimeTempConditionsPrecipWindHumidity
Now 26° Rain 70% 6 mph WSW 91%
9 PM 25° Rain 72% 4 mph WNW 96%
10 PM 25° Mostly Cloudy 62% 5 mph WSW 96%
11 PM 24° Partly Cloudy 63% 4 mph WSW 95%
12 AM 24° Partly Cloudy 28% 4 mph W 96%
1 AM 24° Partly Cloudy 3% 4 mph WNW 96%
2 AM 23° Partly Cloudy 3% 4 mph NW 96%
3 AM 23° Mostly Clear 3% 5 mph NW 96%
4 AM 23° Mostly Clear 4% 5 mph NNW 96%
5 AM 22° Mostly Clear 5% 5 mph NNW 96%
6 AM 21° Partly Cloudy 5% 6 mph NNW 95%
7 AM 22° Partly Cloudy 5% 6 mph NNW 93%
8 AM 23° Partly Cloudy 5% 6 mph N 88%
9 AM 24° Partly Cloudy 5% 6 mph N 84%
10 AM 26° Partly Cloudy 5% 7 mph N 79%
11 AM 26° Partly Cloudy 5% 7 mph N 75%
12 PM 27° Mostly Cloudy 5% 8 mph N 72%
1 PM 29° Mostly Cloudy 5% 8 mph N 70%
2 PM 29° Mostly Cloudy 5% 8 mph N 69%
3 PM 29° Partly Cloudy 5% 8 mph N 68%
4 PM 29° Partly Cloudy 3% 9 mph N 69%
5 PM 28° Partly Cloudy 3% 8 mph N 72%
6 PM 27° Mostly Cloudy 3% 8 mph N 75%
7 PM 27° Partly Cloudy 3% 8 mph N 78%
15-Day Forecast
Today
7/21
Rain
70%
21°
33°
Wed
7/22
Partly Cloudy
5%
18°
30°
Thu
7/23
Mostly Clear
3%
16°
28°
Fri
7/24
Partly Cloudy
60%
17°
26°
Sat
7/25
Mostly Cloudy
47%
19°
29°
Sun
7/26
Thunderstorm
64%
22°
33°
Mon
7/27
Clear
52%
23°
33°
Tue
7/28
Drizzle
53%
20°
32°
Wed
7/29
Drizzle
44%
18°
29°
Thu
7/30
Drizzle
44%
16°
29°
Fri
7/31
Drizzle
36%
16°
29°
Sat
8/1
Clear
60%
18°
30°
Sun
8/2
Drizzle
60%
19°
31°
Mon
8/3
Drizzle
60%
19°
32°
Tue
8/4
Drizzle
60%
21°
31°
52
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
52 AQI 9.6 µg/m³
O3
Ground-level ozone
26 AQI 29 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 52 Moderate 26 52
Thu 36 Good 26 36
Fri 32 Good 32 27
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 Jul 21, 23:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 50 60 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE1716 J/kg
MLCAPE2636 J/kg
MUCAPE2996 J/kg
SBCIN-62 J/kg
MLCIN0 J/kg
Lifted Index-3.7
Kinematics
0–6 km Shear44 kt
0–1 km Shear16 kt
Eff. Shear49 kt
0–1 km SRH-37
0–3 km SRH-70
Eff. SRH-70
Storm Motion259° @ 32 kt
0–1 km EHI-0.4
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index43.5
Thermo & Levels
PWAT2.57 in
0–3 km LR5.1 °C/km
700–500 LR5.2 °C/km
Total Totals47.7
LCL966 hPa
LFC803 hPa
EL146 hPa
Freezing Lvl16,371 ft