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

Hays County, Texas, United States

Last updated: 3:50 PM CDT  ·  Refresh
94°F
Feels like 98°
Partly Cloudy
▲ 96°  /  ▼ 73°
Wind
10 mph SSE
Humidity
42%
Dew Point
69°
Pressure
28.83 inHg
Visibility
10 mi
UV Index
7.8
Cloud Cover
36%
Sunrise
7:15 AM
Sunset
7:39 PM
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WeatherAI™ Analysis

WeatherAI Analysis: Hays County is currently partly cloudy at 94°F. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 2336 J/kg) — isolated convective development possible. Sunrise: 7:15AM · Sunset: 7:39PM.

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
28 AQI · Good Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
94°
4%
4 PM
95°
29%
5 PM
94°
28%
6 PM
88°
27%
7 PM
84°
27%
8 PM
82°
26%
9 PM
82°
36%
10 PM
81°
10%
11 PM
80°
3%
12 AM
80°
3%
1 AM
79°
3%
2 AM
78°
3%
3 AM
78°
3%
4 AM
78°
3%
5 AM
73°
3%
6 AM
73°
3%
7 AM
74°
3%
8 AM
76°
9%
9 AM
77°
9%
10 AM
83°
9%
11 AM
85°
10%
12 PM
86°
10%
1 PM
91°
10%
2 PM
92°
13%
7-Day Forecast
Today
96° 73°
Partly Cloudy with a 36% chance of rain.
Mon
101° 73°
Mostly Clear.
Tue
100° 73°
Mostly Clear.
Wed
95° 75°
Partly Cloudy with a 44% chance of rain.
Thu
96° 73°
Drizzle, 50% chance.
Fri
98° 72°
Clear.
Sat
97° 71°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 94° Partly Cloudy 4% 10 mph SSE 42%
4 PM 95° Partly Cloudy 29% 12 mph SSE 43%
5 PM 94° Partly Cloudy 28% 14 mph SSE 48%
6 PM 88° Mostly Cloudy 27% 16 mph SE 61%
7 PM 84° Overcast 27% 16 mph SE 66%
8 PM 82° Mostly Cloudy 26% 12 mph SE 70%
9 PM 82° Rain 36% 9 mph SE 74%
10 PM 81° Mostly Cloudy 10% 9 mph SSE 78%
11 PM 80° Partly Cloudy 3% 10 mph SSE 81%
12 AM 80° Partly Cloudy 3% 10 mph S 84%
1 AM 79° Partly Cloudy 3% 9 mph S 86%
2 AM 78° Partly Cloudy 3% 8 mph S 88%
3 AM 78° Partly Cloudy 3% 8 mph S 90%
4 AM 78° Partly Cloudy 3% 7 mph SSW 90%
5 AM 73° Partly Cloudy 3% 7 mph SSW 91%
6 AM 73° Partly Cloudy 3% 6 mph SSW 91%
7 AM 74° Mostly Clear 3% 7 mph SSW 88%
8 AM 76° Mostly Clear 9% 9 mph S 81%
9 AM 77° Clear 9% 10 mph S 76%
10 AM 83° Clear 9% 10 mph S 71%
11 AM 85° Mostly Clear 10% 10 mph S 65%
12 PM 86° Mostly Clear 10% 9 mph S 59%
1 PM 91° Mostly Clear 10% 10 mph S 56%
2 PM 92° Partly Cloudy 13% 10 mph S 53%
15-Day Forecast
Today
9/13
Partly Cloudy
36%
73°
96°
Mon
9/14
Mostly Clear
14%
73°
101°
Tue
9/15
Mostly Clear
8%
73°
100°
Wed
9/16
Partly Cloudy
44%
75°
95°
Thu
9/17
Drizzle
50%
73°
96°
Fri
9/18
Clear
3%
72°
98°
Sat
9/19
Clear
19%
71°
97°
Sun
9/20
Clear
60%
72°
96°
Mon
9/21
Drizzle
60%
73°
97°
Tue
9/22
Drizzle
60%
71°
93°
Wed
9/23
Drizzle
60%
71°
92°
Thu
9/24
Drizzle
60%
71°
92°
Fri
9/25
Drizzle
60%
70°
91°
Sat
9/26
Drizzle
60%
69°
91°
Sun
9/27
Drizzle
60%
69°
91°
28
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
28 AQI 5.1 µg/m³
O3
Ground-level ozone
26 AQI 29 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Mon 28 Good 26 28
Tue 27 Good 27 23
Wed 52 Moderate 30 52
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
SBCAPE2636 J/kg
MLCAPE1844 J/kg
MUCAPE2636 J/kg
SBCIN0 J/kg
MLCIN-9 J/kg
Lifted Index-4.8
Kinematics
0–6 km Shear6 kt
0–1 km Shear4 kt
Eff. Shear12 kt
0–1 km SRH-12
0–3 km SRH-10
Eff. SRH-10
Storm Motion156° @ 23 kt
0–1 km EHI-0.2
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index33.4
Thermo & Levels
PWAT1.71 in
0–3 km LR8.3 °C/km
700–500 LR5.6 °C/km
Total Totals47.4
LCL800 hPa
LFC976 hPa
EL150 hPa
Freezing Lvl15,390 ft