Heat Advisory — Williamson, TX, Hays, TX, Travis, TX, Bastrop, TX, Lee, TX, Bexar, TX, Comal, TX, Guadalupe, TX, Caldwell, TX, Fayette, TX, Atascosa, TX, Wilson, TX, Karnes, TX, Gonzales, TX, De Witt, TX, Lavaca, TX 7:00 PM Heat Advisory — Williamson, TX, Hays, TX, Travis, TX, Bastrop, TX, Lee, TX, Bexar, TX, Comal, TX, Guadalupe, TX, Caldwell, TX, Fayette, TX, Atascosa, TX, Wilson, TX, Karnes, TX, Gonzales, TX, De Witt, TX, Lavaca, TX 7:00 PM

Karnes County, Texas, United States

Last updated: 3:51 PM CDT  ·  Refresh
37°C
Feels like 41°
Partly Cloudy
▲ 37°  /  ▼ 24°
Wind
14 mph SSE
Humidity
42%
Dew Point
21°
Pressure
29.53 inHg
Visibility
10 mi
UV Index
7.5
Cloud Cover
48%
Sunrise
7:15 AM
Sunset
7:38 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Karnes County is currently partly cloudy at 36°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 2608 J/kg) — isolated convective development possible. Sunrise: 7:15AM · Sunset: 7:38PM.

Alerts

Heat Advisory
Williamson, TX, Hays, TX, Travis, TX, Bastrop, TX, Lee, TX, Bexar, TX, Comal, TX, Guadalupe, TX, Caldwell, TX, Fayette, TX, Atascosa, TX, Wilson, TX, Karnes, TX, Gonzales, TX, De Witt, TX, Lavaca, TX
Expires 7:00 PM
Heat Advisory
Williamson, TX, Hays, TX, Travis, TX, Bastrop, TX, Lee, TX, Bexar, TX, Comal, TX, Guadalupe, TX, Caldwell, TX, Fayette, TX, Atascosa, TX, Wilson, TX, Karnes, TX, Gonzales, TX, De Witt, TX, Lavaca, TX
Expires 7:00 PM
34 AQI · Good Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
37°
3%
4 PM
37°
3%
5 PM
36°
3%
6 PM
35°
3%
7 PM
33°
3%
8 PM
32°
3%
9 PM
29°
3%
10 PM
28°
3%
11 PM
28°
3%
12 AM
28°
3%
1 AM
27°
3%
2 AM
27°
3%
3 AM
26°
3%
4 AM
26°
3%
5 AM
24°
3%
6 AM
24°
3%
7 AM
25°
3%
8 AM
26°
3%
9 AM
28°
3%
10 AM
31°
3%
11 AM
32°
3%
12 PM
33°
3%
1 PM
34°
3%
2 PM
33°
3%
7-Day Forecast
Today
37° 24°
Mostly Cloudy.
Mon
39° 24°
Mostly Cloudy.
Tue
40° 24°
Partly Cloudy.
Wed
37° 24°
Partly Cloudy with a 38% chance of rain.
Thu
36° 24°
Drizzle, 60% chance.
Fri
37° 23°
Clear.
Sat
37° 22°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 37° Partly Cloudy 3% 14 mph SSE 42%
4 PM 37° Partly Cloudy 3% 16 mph SSE 44%
5 PM 36° Partly Cloudy 3% 17 mph SE 48%
6 PM 35° Mostly Cloudy 3% 17 mph SE 53%
7 PM 33° Mostly Cloudy 3% 15 mph SE 61%
8 PM 32° Mostly Cloudy 3% 14 mph SE 68%
9 PM 29° Mostly Cloudy 3% 12 mph SSE 75%
10 PM 28° Mostly Cloudy 3% 11 mph SSE 76%
11 PM 28° Mostly Cloudy 3% 10 mph SSE 76%
12 AM 28° Partly Cloudy 3% 9 mph SSE 76%
1 AM 27° Mostly Clear 3% 8 mph SSE 80%
2 AM 27° Mostly Clear 3% 7 mph SSE 84%
3 AM 26° Mostly Clear 3% 5 mph SSE 88%
4 AM 26° Mostly Clear 3% 5 mph SE 89%
5 AM 24° Partly Cloudy 3% 5 mph SE 89%
6 AM 24° Partly Cloudy 3% 4 mph SE 89%
7 AM 25° Partly Cloudy 3% 5 mph SSE 86%
8 AM 26° Partly Cloudy 3% 6 mph SSE 77%
9 AM 28° Partly Cloudy 3% 8 mph S 71%
10 AM 31° Partly Cloudy 3% 8 mph SSE 66%
11 AM 32° Mostly Clear 3% 8 mph SSE 60%
12 PM 33° Mostly Clear 3% 8 mph SSE 55%
1 PM 34° Partly Cloudy 3% 9 mph SSE 55%
2 PM 33° Partly Cloudy 3% 10 mph SSE 56%
15-Day Forecast
Today
9/13
Mostly Cloudy
3%
24°
37°
Mon
9/14
Mostly Cloudy
3%
24°
39°
Tue
9/15
Partly Cloudy
3%
24°
40°
Wed
9/16
Partly Cloudy
38%
24°
37°
Thu
9/17
Drizzle
60%
24°
36°
Fri
9/18
Clear
9%
23°
37°
Sat
9/19
Clear
9%
22°
37°
Sun
9/20
Clear
25%
23°
37°
Mon
9/21
Drizzle
60%
23°
37°
Tue
9/22
Drizzle
60%
23°
38°
Wed
9/23
Drizzle
60%
23°
35°
Thu
9/24
Clear
60%
23°
35°
Fri
9/25
Drizzle
60%
22°
34°
Sat
9/26
Clear
25%
22°
34°
Sun
9/27
Drizzle
60%
22°
34°
34
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
34 AQI 6.3 µg/m³
O3
Ground-level ozone
26 AQI 29 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Mon 34 Good 26 34
Tue 34 Good 28 34
Wed 63 Moderate 30 63
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 Sun Sep 13, 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
SBCAPE2663 J/kg
MLCAPE1528 J/kg
MUCAPE2663 J/kg
SBCIN-3 J/kg
MLCIN-21 J/kg
Lifted Index-5.7
Kinematics
0–6 km Shear4 kt
0–1 km Shear3 kt
Eff. Shear9 kt
0–1 km SRH-6
0–3 km SRH-2
Eff. SRH-2
Storm Motion118° @ 21 kt
0–1 km EHI-0.1
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index37.3
Thermo & Levels
PWAT1.78 in
0–3 km LR8.8 °C/km
700–500 LR5.5 °C/km
Total Totals48.4
LCL802 hPa
LFC789 hPa
EL152 hPa
Freezing Lvl16,332 ft