Heat Advisory — Hancock, KY, Ohio, KY, Butler, KY, Logan, KY, Warren, KY, Simpson, KY, Breckinridge, KY, Meade, KY, Grayson, KY, Hardin, KY, Bullitt, KY, Jefferson, KY, Oldham, KY, Trimble, KY, Henry, KY, Shelby, KY, Franklin, KY, Scott, KY, Harrison, KY, Spencer, KY, Anderson, KY, Woodford, KY, Fayette, KY, Bourbon, KY, Nicholas, KY, Nelson, KY, Washington, KY, Mercer, KY, Jessamine, KY, Clark, KY, Larue, KY, Marion, KY, Boyle, KY, Garrard, KY, Madison, KY, Edmonson, KY, Hart, KY, Green, KY, Taylor, KY, Casey, KY, Lincoln, KY, Allen, KY, Barren, KY, Monroe, KY, Metcalfe, KY, Adair, KY, Russell, KY, Cumberland, KY, Clinton, KY 8:00 PM Excessive Heat Warning — Hancock, KY, Breckinridge, KY, Meade, KY, Ohio, KY, Grayson, KY, Hardin, KY, Bullitt, KY, Jefferson, KY, Oldham, KY, Trimble, KY, Henry, KY, Shelby, KY, Franklin, KY, Scott, KY, Harrison, KY, Spencer, KY, Anderson, KY, Woodford, KY, Fayette, KY, Bourbon, KY, Nicholas, KY, Nelson, KY, Washington, KY, Mercer, KY, Jessamine, KY, Clark, KY, Larue, KY, Marion, KY, Boyle, KY, Garrard, KY, Madison, KY, Butler, KY, Edmonson, KY, Hart, KY, Green, KY, Taylor, KY, Casey, KY, Lincoln, KY, Logan, KY, Warren, KY, Simpson, KY, Allen, KY, Barren, KY, Monroe, KY, Metcalfe, KY, Adair, KY, Russell, KY, Cumberland, KY, Clinton, KY 8:00 PM

Jefferson County, Kentucky, United States

Last updated: 3:49 PM CDT  ·  Refresh
33°C
Feels like 39°
Mostly Clear
▲ 33°  /  ▼ 23°
Wind
7 mph SW
Humidity
57%
Dew Point
24°
Pressure
29.49 inHg
Visibility
10 mi
UV Index
8.1
Cloud Cover
11%
Sunrise
6:22 AM
Sunset
9:09 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Jefferson County is currently mostly clear at 34°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 4276 J/kg) — isolated convective development possible. Sunrise: 6:22AM · Sunset: 9:09PM.

Alerts

Heat Advisory
Hancock, KY, Ohio, KY, Butler, KY, Logan, KY, Warren, KY, Simpson, KY, Breckinridge, KY, Meade, KY, Grayson, KY, Hardin, KY, Bullitt, KY, Jefferson, KY, Oldham, KY, Trimble, KY, Henry, KY, Shelby, KY, Franklin, KY, Scott, KY, Harrison, KY, Spencer, KY, Anderson, KY, Woodford, KY, Fayette, KY, Bourbon, KY, Nicholas, KY, Nelson, KY, Washington, KY, Mercer, KY, Jessamine, KY, Clark, KY, Larue, KY, Marion, KY, Boyle, KY, Garrard, KY, Madison, KY, Edmonson, KY, Hart, KY, Green, KY, Taylor, KY, Casey, KY, Lincoln, KY, Allen, KY, Barren, KY, Monroe, KY, Metcalfe, KY, Adair, KY, Russell, KY, Cumberland, KY, Clinton, KY
Expires 8:00 PM
Excessive Heat Warning
Hancock, KY, Breckinridge, KY, Meade, KY, Ohio, KY, Grayson, KY, Hardin, KY, Bullitt, KY, Jefferson, KY, Oldham, KY, Trimble, KY, Henry, KY, Shelby, KY, Franklin, KY, Scott, KY, Harrison, KY, Spencer, KY, Anderson, KY, Woodford, KY, Fayette, KY, Bourbon, KY, Nicholas, KY, Nelson, KY, Washington, KY, Mercer, KY, Jessamine, KY, Clark, KY, Larue, KY, Marion, KY, Boyle, KY, Garrard, KY, Madison, KY, Butler, KY, Edmonson, KY, Hart, KY, Green, KY, Taylor, KY, Casey, KY, Lincoln, KY, Logan, KY, Warren, KY, Simpson, KY, Allen, KY, Barren, KY, Monroe, KY, Metcalfe, KY, Adair, KY, Russell, KY, Cumberland, KY, Clinton, KY
Expires 8:00 PM
58 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
33°
3%
5 PM
34°
3%
6 PM
33°
3%
7 PM
32°
3%
8 PM
31°
3%
9 PM
28°
3%
10 PM
27°
3%
11 PM
27°
3%
12 AM
26°
3%
1 AM
26°
3%
2 AM
25°
3%
3 AM
24°
6%
4 AM
24°
6%
5 AM
23°
6%
6 AM
23°
17%
7 AM
23°
17%
8 AM
25°
17%
9 AM
27°
3%
10 AM
28°
3%
11 AM
29°
3%
12 PM
30°
3%
1 PM
32°
3%
2 PM
32°
3%
3 PM
32°
3%
7-Day Forecast
Today
33° 23°
Mostly Clear.
Wed
35° 23°
Fog.
Thu
36° 22°
Clear with a 24% chance of rain.
Fri
34° 24°
Mostly Clear with a 52% chance of rain.
Sat
31° 22°
Drizzle, 60% chance.
Sun
31° 22°
Thunderstorm, 81% chance.
Mon
31° 22°
Thunderstorm, 60% chance.
TimeTempConditionsPrecipWindHumidity
Now 33° Mostly Clear 3% 7 mph SW 57%
5 PM 34° Mostly Clear 3% 7 mph SW 61%
6 PM 33° Mostly Clear 3% 6 mph SW 68%
7 PM 32° Partly Cloudy 3% 5 mph SW 75%
8 PM 31° Mostly Clear 3% 4 mph SW 80%
9 PM 28° Clear 3% 4 mph SSW 84%
10 PM 27° Clear 3% 4 mph S 88%
11 PM 27° Clear 3% 4 mph S 89%
12 AM 26° Clear 3% 3 mph S 90%
1 AM 26° Clear 3% 3 mph S 91%
2 AM 25° Clear 3% 3 mph S 93%
3 AM 24° Mostly Clear 6% 3 mph S 94%
4 AM 24° Haze 6% 3 mph S 96%
5 AM 23° Haze 6% 2 mph SSE 95%
6 AM 23° Fog 17% 2 mph SSE 94%
7 AM 23° Fog 17% 2 mph SE 93%
8 AM 25° Mostly Clear 17% 2 mph SSE 86%
9 AM 27° Mostly Clear 3% 2 mph S 78%
10 AM 28° Clear 3% 2 mph S 72%
11 AM 29° Clear 3% 2 mph S 68%
12 PM 30° Clear 3% 3 mph S 64%
1 PM 32° Clear 3% 3 mph S 61%
2 PM 32° Clear 3% 3 mph SSW 60%
3 PM 32° Clear 3% 3 mph SSW 60%
15-Day Forecast
Today
6/30
Mostly Clear
3%
23°
33°
Wed
7/1
Fog
17%
23°
35°
Thu
7/2
Clear
24%
22°
36°
Fri
7/3
Mostly Clear
52%
24°
34°
Sat
7/4
Drizzle
60%
22°
31°
Sun
7/5
Thunderstorm
81%
22°
31°
Mon
7/6
Thunderstorm
60%
22°
31°
Tue
7/7
Rain
81%
21°
30°
Wed
7/8
Drizzle
60%
21°
30°
Thu
7/9
Drizzle
60%
21°
31°
Fri
7/10
Drizzle
60%
20°
28°
Sat
7/11
Drizzle
60%
19°
28°
Sun
7/12
Drizzle
60%
19°
28°
Mon
7/13
Drizzle
60%
19°
28°
Tue
7/14
Drizzle
60%
19°
28°
58
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
58 AQI 12.8 µg/m³
O3
Ground-level ozone
42 AQI 45 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Wed 58 Moderate 42 58
Thu 59 Moderate 47 59
Fri 58 Moderate 58 57
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 Jun 30, 19:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE3981 J/kg
MLCAPE1928 J/kg
MUCAPE3981 J/kg
SBCIN0 J/kg
MLCIN0 J/kg
Lifted Index-9.2
Kinematics
0–6 km Shear3 kt
0–1 km Shear2 kt
Eff. Shear1 kt
0–1 km SRH-0
0–3 km SRH-32
Eff. SRH-32
Storm Motion223° @ 20 kt
0–1 km EHI-0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index2.6
Thermo & Levels
PWAT1.18 in
0–3 km LR6.7 °C/km
700–500 LR7.6 °C/km
Total Totals32.8
LCL867 hPa
LFC999 hPa
EL141 hPa
Freezing Lvl15,210 ft