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

Bexar County, Texas, United States

Last updated: 3:48 PM CDT  ·  Refresh
98°F
Feels like 102°
Partly Cloudy
▲ 98°  /  ▼ 75°
Wind
10 mph SSE
Humidity
36%
Dew Point
68°
Pressure
29.20 inHg
Visibility
10 mi
UV Index
7.9
Cloud Cover
34%
Sunrise
7:17 AM
Sunset
7:41 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Bexar County is currently partly cloudy at 98°F. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 2273 J/kg) — isolated convective development possible. Sunrise: 7:17AM · Sunset: 7:41PM.

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
45 AQI · Good Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
98°
3%
4 PM
96°
14%
5 PM
99°
22%
6 PM
96°
21%
7 PM
94°
21%
8 PM
92°
20%
9 PM
88°
10%
10 PM
86°
8%
11 PM
84°
3%
12 AM
83°
3%
1 AM
81°
3%
2 AM
80°
3%
3 AM
80°
3%
4 AM
79°
3%
5 AM
75°
3%
6 AM
75°
3%
7 AM
76°
3%
8 AM
77°
3%
9 AM
76°
3%
10 AM
82°
3%
11 AM
84°
3%
12 PM
87°
3%
1 PM
91°
3%
2 PM
92°
3%
7-Day Forecast
Today
98° 75°
Partly Cloudy with a 21% chance of rain.
Mon
101° 75°
Mostly Cloudy.
Tue
101° 75°
Partly Cloudy.
Wed
97° 74°
Partly Cloudy with a 44% chance of rain.
Thu
94° 74°
Drizzle, 60% chance.
Fri
96° 72°
Clear.
Sat
97° 70°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 98° Partly Cloudy 3% 10 mph SSE 36%
4 PM 96° Partly Cloudy 14% 12 mph SSE 36%
5 PM 99° Partly Cloudy 22% 13 mph SE 38%
6 PM 96° Mostly Cloudy 21% 14 mph SE 41%
7 PM 94° Mostly Cloudy 21% 14 mph SE 49%
8 PM 92° Partly Cloudy 20% 13 mph SE 57%
9 PM 88° Partly Cloudy 10% 12 mph SE 65%
10 PM 86° Partly Cloudy 8% 11 mph SSE 71%
11 PM 84° Partly Cloudy 3% 10 mph SSE 75%
12 AM 83° Mostly Cloudy 3% 8 mph SSE 79%
1 AM 81° Mostly Cloudy 3% 7 mph SSE 81%
2 AM 80° Mostly Cloudy 3% 6 mph SSE 83%
3 AM 80° Partly Cloudy 3% 4 mph SSE 84%
4 AM 79° Partly Cloudy 3% 4 mph SSE 85%
5 AM 75° Partly Cloudy 3% 3 mph SSE 86%
6 AM 75° Partly Cloudy 3% 3 mph SE 86%
7 AM 76° Mostly Cloudy 3% 4 mph SE 86%
8 AM 77° Mostly Cloudy 3% 5 mph SSE 82%
9 AM 76° Mostly Cloudy 3% 5 mph SSE 82%
10 AM 82° Mostly Cloudy 3% 6 mph SSE 74%
11 AM 84° Partly Cloudy 3% 6 mph SSE 66%
12 PM 87° Mostly Clear 3% 6 mph SSE 57%
1 PM 91° Partly Cloudy 3% 7 mph SSE 54%
2 PM 92° Partly Cloudy 3% 8 mph SSE 51%
15-Day Forecast
Today
9/13
Partly Cloudy
21%
75°
98°
Mon
9/14
Mostly Cloudy
3%
75°
101°
Tue
9/15
Partly Cloudy
3%
75°
101°
Wed
9/16
Partly Cloudy
44%
74°
97°
Thu
9/17
Drizzle
60%
74°
94°
Fri
9/18
Clear
3%
72°
96°
Sat
9/19
Clear
19%
70°
97°
Sun
9/20
Clear
60%
71°
96°
Mon
9/21
Drizzle
60%
73°
95°
Tue
9/22
Drizzle
60%
73°
98°
Wed
9/23
Drizzle
60%
71°
91°
Thu
9/24
Drizzle
60%
73°
90°
Fri
9/25
Drizzle
60%
72°
89°
Sat
9/26
Clear
60%
71°
90°
Sun
9/27
Drizzle
60%
71°
89°
45
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
45 AQI 8.1 µg/m³
O3
Ground-level ozone
29 AQI 32 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Mon 45 Good 29 45
Tue 42 Good 30 42
Wed 63 Moderate 32 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
SBCAPE2421 J/kg
MLCAPE1233 J/kg
MUCAPE2421 J/kg
SBCIN0 J/kg
MLCIN-17 J/kg
Lifted Index-4.8
Kinematics
0–6 km Shear3 kt
0–1 km Shear3 kt
Eff. Shear8 kt
0–1 km SRH-12
0–3 km SRH-23
Eff. SRH-23
Storm Motion110° @ 18 kt
0–1 km EHI-0.2
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index33.7
Thermo & Levels
PWAT1.61 in
0–3 km LR8.9 °C/km
700–500 LR5.4 °C/km
Total Totals46.7
LCL782 hPa
LFC989 hPa
EL157 hPa
Freezing Lvl16,024 ft