Heat Advisory — Houston, TX, Trinity, TX, Madison, TX, Walker, TX, San Jacinto, TX, Polk, TX, Burleson, TX, Brazos, TX, Washington, TX, Grimes, TX, Montgomery, TX, Northern Liberty, TX, Colorado, TX, Austin, TX, Waller, TX, Inland Harris, TX, Wharton, TX, Fort Bend, TX, Inland Jackson, TX, Inland Matagorda, TX, Inland Brazoria, TX, Coastal Jackson, TX 6:00 PM Heat Advisory — Houston, TX, Trinity, TX, Madison, TX, Walker, TX, San Jacinto, TX, Polk, TX, Burleson, TX, Brazos, TX, Washington, TX, Grimes, TX, Montgomery, TX, Northern Liberty, TX, Colorado, TX, Austin, TX, Waller, TX, Inland Harris, TX, Wharton, TX, Fort Bend, TX, Inland Jackson, TX, Inland Matagorda, TX, Inland Brazoria, TX, Coastal Jackson, TX 6:00 PM

San Jacinto County, Texas, United States

Last updated: 5:04 PM CDT  ·  Refresh
32°C
Feels like 38°
Mostly Clear
▲ 33°  /  ▼ 23°
Wind
8 mph SSE
Humidity
62%
Dew Point
24°
Pressure
29.71 inHg
Visibility
10 mi
UV Index
6.2
Cloud Cover
25%
Sunrise
7:03 AM
Sunset
7:28 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: San Jacinto County is currently mostly clear at 32°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 3097 J/kg) — isolated convective development possible. Sunrise: 7:03AM · Sunset: 7:28PM.

Alerts

Heat Advisory
Houston, TX, Trinity, TX, Madison, TX, Walker, TX, San Jacinto, TX, Polk, TX, Burleson, TX, Brazos, TX, Washington, TX, Grimes, TX, Montgomery, TX, Northern Liberty, TX, Colorado, TX, Austin, TX, Waller, TX, Inland Harris, TX, Wharton, TX, Fort Bend, TX, Inland Jackson, TX, Inland Matagorda, TX, Inland Brazoria, TX, Coastal Jackson, TX
Expires 6:00 PM
Heat Advisory
Houston, TX, Trinity, TX, Madison, TX, Walker, TX, San Jacinto, TX, Polk, TX, Burleson, TX, Brazos, TX, Washington, TX, Grimes, TX, Montgomery, TX, Northern Liberty, TX, Colorado, TX, Austin, TX, Waller, TX, Inland Harris, TX, Wharton, TX, Fort Bend, TX, Inland Jackson, TX, Inland Matagorda, TX, Inland Brazoria, TX, Coastal Jackson, TX
Expires 6:00 PM
33 AQI · Good Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
32°
10%
6 PM
32°
9%
7 PM
31°
9%
8 PM
29°
9%
9 PM
29°
9%
10 PM
27°
7%
11 PM
27°
7%
12 AM
27°
4%
1 AM
26°
3%
2 AM
26°
5%
3 AM
26°
5%
4 AM
25°
5%
5 AM
25°
8%
6 AM
23°
8%
7 AM
23°
8%
8 AM
24°
19%
9 AM
26°
29%
10 AM
27°
29%
11 AM
27°
30%
12 PM
30°
33%
1 PM
30°
34%
2 PM
31°
34%
3 PM
31°
32%
4 PM
32°
31%
7-Day Forecast
Today
33° 23°
Mostly Clear.
Mon
36° 23°
Partly Cloudy with a 35% chance of rain.
Tue
36° 23°
Mostly Clear.
Wed
33° 23°
Partly Cloudy.
Thu
33° 23°
Mostly Cloudy.
Fri
34° 22°
Mostly Clear.
Sat
34° 21°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 32° Mostly Clear 10% 8 mph SSE 62%
6 PM 32° Mostly Cloudy 9% 7 mph SSE 68%
7 PM 31° Mostly Cloudy 9% 6 mph SSE 72%
8 PM 29° Mostly Cloudy 9% 6 mph SSE 75%
9 PM 29° Partly Cloudy 9% 6 mph SSE 76%
10 PM 27° Mostly Clear 7% 5 mph SSE 79%
11 PM 27° Partly Cloudy 7% 5 mph SSE 84%
12 AM 27° Partly Cloudy 4% 4 mph SSE 88%
1 AM 26° Mostly Clear 3% 4 mph SSE 93%
2 AM 26° Mostly Clear 5% 4 mph SSE 94%
3 AM 26° Mostly Clear 5% 3 mph SSE 95%
4 AM 25° Mostly Clear 5% 3 mph SSE 96%
5 AM 25° Mostly Clear 8% 3 mph SSE 96%
6 AM 23° Mostly Clear 8% 2 mph SSE 95%
7 AM 23° Mostly Clear 8% 2 mph SE 94%
8 AM 24° Partly Cloudy 19% 2 mph SE 91%
9 AM 26° Partly Cloudy 29% 2 mph SE 85%
10 AM 27° Partly Cloudy 29% 2 mph SE 82%
11 AM 27° Partly Cloudy 30% 2 mph SSE 77%
12 PM 30° Partly Cloudy 33% 3 mph SSE 72%
1 PM 30° Partly Cloudy 34% 3 mph SSE 68%
2 PM 31° Partly Cloudy 34% 4 mph SSE 68%
3 PM 31° Partly Cloudy 32% 4 mph SSE 68%
4 PM 32° Partly Cloudy 31% 6 mph SE 69%
15-Day Forecast
Today
9/13
Mostly Clear
10%
23°
33°
Mon
9/14
Partly Cloudy
35%
23°
36°
Tue
9/15
Mostly Clear
14%
23°
36°
Wed
9/16
Partly Cloudy
15%
23°
33°
Thu
9/17
Mostly Cloudy
11%
23°
33°
Fri
9/18
Mostly Clear
8%
22°
34°
Sat
9/19
Clear
8%
21°
34°
Sun
9/20
Clear
60%
22°
33°
Mon
9/21
Drizzle
60%
22°
33°
Tue
9/22
Drizzle
67%
22°
32°
Wed
9/23
Drizzle
67%
21°
32°
Thu
9/24
Drizzle
60%
21°
32°
Fri
9/25
Drizzle
60%
21°
32°
Sat
9/26
Clear
25%
20°
31°
Sun
9/27
Drizzle
60%
20°
31°
33
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
33 AQI 6.0 µg/m³
O3
Ground-level ozone
30 AQI 32 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Mon 33 Good 30 33
Tue 31 Good 31 27
Wed 32 Good 32 24
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, 20:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE3296 J/kg
MLCAPE2515 J/kg
MUCAPE3296 J/kg
SBCIN-22 J/kg
MLCIN-61 J/kg
Lifted Index-6.2
Kinematics
0–6 km Shear8 kt
0–1 km Shear5 kt
Eff. Shear10 kt
0–1 km SRH-12
0–3 km SRH40
Eff. SRH40
Storm Motion114° @ 20 kt
0–1 km EHI-0.2
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index35.3
Thermo & Levels
PWAT2.03 in
0–3 km LR7.2 °C/km
700–500 LR5.4 °C/km
Total Totals45.7
LCL894 hPa
LFC845 hPa
EL144 hPa
Freezing Lvl16,348 ft