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: 3:52 PM CDT  ·  Refresh
33°C
Feels like 38°
Partly Cloudy
▲ 34°  /  ▼ 23°
Wind
8 mph SSE
Humidity
59%
Dew Point
24°
Pressure
29.71 inHg
Visibility
10 mi
UV Index
7.6
Cloud Cover
33%
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 partly cloudy at 33°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 3095 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
33°
7%
4 PM
32°
8%
5 PM
32°
5%
6 PM
31°
5%
7 PM
30°
5%
8 PM
29°
5%
9 PM
27°
5%
10 PM
27°
3%
11 PM
27°
3%
12 AM
26°
3%
1 AM
26°
5%
2 AM
26°
5%
3 AM
26°
5%
4 AM
25°
9%
5 AM
23°
9%
6 AM
23°
9%
7 AM
24°
16%
8 AM
25°
31%
9 AM
27°
31%
10 AM
29°
32%
11 AM
29°
33%
12 PM
30°
33%
1 PM
31°
34%
2 PM
31°
34%
7-Day Forecast
Today
34° 23°
Partly Cloudy.
Mon
35° 23°
Partly Cloudy with a 39% chance of rain.
Tue
36° 23°
Mostly Clear.
Wed
33° 24°
Mostly Cloudy.
Thu
34° 22°
Clear.
Fri
36° 22°
Clear.
Sat
36° 22°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 33° Partly Cloudy 7% 8 mph SSE 59%
4 PM 32° Mostly Cloudy 8% 8 mph SSE 63%
5 PM 32° Mostly Cloudy 5% 8 mph SSE 66%
6 PM 31° Mostly Cloudy 5% 7 mph SSE 71%
7 PM 30° Mostly Cloudy 5% 6 mph SSE 74%
8 PM 29° Partly Cloudy 5% 6 mph SSE 76%
9 PM 27° Mostly Clear 5% 6 mph SSE 79%
10 PM 27° Clear 3% 5 mph SSE 84%
11 PM 27° Mostly Clear 3% 5 mph SSE 89%
12 AM 26° Mostly Clear 3% 4 mph S 94%
1 AM 26° Mostly Clear 5% 4 mph SSE 95%
2 AM 26° Mostly Clear 5% 3 mph SSE 96%
3 AM 26° Partly Cloudy 5% 3 mph SSE 96%
4 AM 25° Partly Cloudy 9% 3 mph SSE 96%
5 AM 23° Partly Cloudy 9% 2 mph SSE 96%
6 AM 23° Partly Cloudy 9% 2 mph ESE 96%
7 AM 24° Partly Cloudy 16% 2 mph ESE 94%
8 AM 25° Partly Cloudy 31% 3 mph SE 88%
9 AM 27° Partly Cloudy 31% 3 mph SE 84%
10 AM 29° Partly Cloudy 32% 3 mph SE 80%
11 AM 29° Partly Cloudy 33% 3 mph SSE 74%
12 PM 30° Partly Cloudy 33% 4 mph SSE 69%
1 PM 31° Partly Cloudy 34% 4 mph SSE 67%
2 PM 31° Partly Cloudy 34% 4 mph SSE 66%
15-Day Forecast
Today
9/13
Partly Cloudy
7%
23°
34°
Mon
9/14
Partly Cloudy
39%
23°
35°
Tue
9/15
Mostly Clear
16%
23°
36°
Wed
9/16
Mostly Cloudy
12%
24°
33°
Thu
9/17
Clear
9%
22°
34°
Fri
9/18
Clear
9%
22°
36°
Sat
9/19
Clear
9%
22°
36°
Sun
9/20
Clear
60%
22°
33°
Mon
9/21
Drizzle
60%
22°
33°
Tue
9/22
Drizzle
60%
21°
32°
Wed
9/23
Drizzle
60%
19°
31°
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, 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
SBCAPE3734 J/kg
MLCAPE3370 J/kg
MUCAPE3734 J/kg
SBCIN0 J/kg
MLCIN-5 J/kg
Lifted Index-6.4
Kinematics
0–6 km Shear3 kt
0–1 km Shear3 kt
Eff. Shear12 kt
0–1 km SRH-4
0–3 km SRH21
Eff. SRH21
Storm Motion124° @ 17 kt
0–1 km EHI-0.1
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index36.5
Thermo & Levels
PWAT2.08 in
0–3 km LR7.5 °C/km
700–500 LR5.2 °C/km
Total Totals46.3
LCL887 hPa
LFC1006 hPa
EL137 hPa
Freezing Lvl16,234 ft