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, Chambers, TX, Wharton, TX, Fort Bend, TX, Inland Jackson, TX, Inland Matagorda, TX, Inland Brazoria, TX, Inland Galveston, TX, Southern Liberty, TX, Coastal Harris, TX, Coastal Jackson, TX, Coastal Matagorda, TX, Coastal Brazoria, TX, Coastal Galveston, TX, Matagorda Islands, TX, Brazoria Islands, TX, Galveston Island, TX, Bolivar Peninsula, TX 7:00 PM

San Jacinto County, Texas, United States

Last updated: 3:43 AM CDT  ·  Refresh
26°C
Feels like 29°
Mostly Clear
▲ 37°  /  ▼ 24°
Wind
6 mph SSW
Humidity
84%
Dew Point
23°
Pressure
29.71 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
15%
Sunrise
6:53 AM
Sunset
7:51 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: San Jacinto County is currently mostly clear at 26°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 1983 J/kg) — isolated convective development possible. Sunrise: 6:53AM · Sunset: 7:51PM.

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, Chambers, TX, Wharton, TX, Fort Bend, TX, Inland Jackson, TX, Inland Matagorda, TX, Inland Brazoria, TX, Inland Galveston, TX, Southern Liberty, TX, Coastal Harris, TX, Coastal Jackson, TX, Coastal Matagorda, TX, Coastal Brazoria, TX, Coastal Galveston, TX, Matagorda Islands, TX, Brazoria Islands, TX, Galveston Island, TX, Bolivar Peninsula, TX
Expires 7:00 PM
56 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
26°
3%
4 AM
27°
3%
5 AM
23°
3%
6 AM
23°
3%
7 AM
24°
3%
8 AM
26°
3%
9 AM
27°
3%
10 AM
28°
3%
11 AM
29°
3%
12 PM
31°
3%
1 PM
34°
3%
2 PM
35°
3%
3 PM
36°
13%
4 PM
36°
13%
5 PM
37°
13%
6 PM
36°
3%
7 PM
34°
3%
8 PM
33°
3%
9 PM
32°
3%
10 PM
29°
3%
11 PM
29°
3%
12 AM
29°
3%
1 AM
29°
3%
2 AM
29°
3%
7-Day Forecast
Today
37° 24°
Mostly Clear.
Wed
39° 24°
Partly Cloudy.
Thu
41° 24°
Clear with a 59% chance of rain.
Fri
38° 24°
Rain, 56% chance.
Sat
40° 22°
Clear.
Sun
39° 23°
Drizzle, 38% chance.
Mon
38° 22°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 26° Mostly Clear 3% 6 mph SSW 84%
4 AM 27° Mostly Clear 3% 5 mph SSW 87%
5 AM 23° Mostly Clear 3% 5 mph SSW 89%
6 AM 23° Partly Cloudy 3% 4 mph SSW 91%
7 AM 24° Partly Cloudy 3% 4 mph SW 88%
8 AM 26° Partly Cloudy 3% 6 mph SW 82%
9 AM 27° Partly Cloudy 3% 6 mph SW 74%
10 AM 28° Partly Cloudy 3% 5 mph WSW 66%
11 AM 29° Partly Cloudy 3% 4 mph WSW 59%
12 PM 31° Partly Cloudy 3% 4 mph WSW 52%
1 PM 34° Partly Cloudy 3% 3 mph SSW 48%
2 PM 35° Partly Cloudy 3% 3 mph SE 45%
3 PM 36° Mostly Clear 13% 4 mph SE 42%
4 PM 36° Clear 13% 5 mph SE 43%
5 PM 37° Mostly Clear 13% 6 mph SE 45%
6 PM 36° Mostly Clear 3% 7 mph SE 48%
7 PM 34° Mostly Clear 3% 7 mph SE 53%
8 PM 33° Mostly Clear 3% 8 mph SSE 60%
9 PM 32° Mostly Clear 3% 8 mph SSE 68%
10 PM 29° Mostly Clear 3% 8 mph S 72%
11 PM 29° Mostly Clear 3% 7 mph S 72%
12 AM 29° Mostly Clear 3% 6 mph S 72%
1 AM 29° Mostly Clear 3% 6 mph S 73%
2 AM 29° Mostly Clear 3% 6 mph S 75%
15-Day Forecast
Today
8/25
Mostly Clear
13%
24°
37°
Wed
8/26
Partly Cloudy
12%
24°
39°
Thu
8/27
Clear
59%
24°
41°
Fri
8/28
Rain
56%
24°
38°
Sat
8/29
Clear
16%
22°
40°
Sun
8/30
Drizzle
38%
23°
39°
Mon
8/31
Clear
8%
22°
38°
Tue
9/1
Clear
18%
23°
39°
Wed
9/2
Drizzle
44%
23°
40°
Thu
9/3
Clear
36%
23°
38°
Fri
9/4
Clear
25%
24°
40°
Sat
9/5
Drizzle
60%
24°
40°
Sun
9/6
Drizzle
60%
24°
39°
Mon
9/7
Drizzle
60%
24°
38°
Tue
9/8
Drizzle
60%
24°
38°
56
Moderate
U.S. Air Quality Index · Dominant: PM2.5
50 100 150 200

Air quality is acceptable. Unusually sensitive people should consider limiting prolonged outdoor exertion.

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
Dominant
56 AQI 11.7 µg/m³
O3
Ground-level ozone
51 AQI 55 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 56 Moderate 51 56
Wed 48 Good 45 48
Thu 54 Moderate 54 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 Tue Aug 25, 07:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE1313 J/kg
MLCAPE765 J/kg
MUCAPE1313 J/kg
SBCIN-345 J/kg
MLCIN-389 J/kg
Lifted Index-4.3
Kinematics
0–6 km Shear20 kt
0–1 km Shear11 kt
Eff. Shear—
0–1 km SRH-59
0–3 km SRH-27
Eff. SRH—
Storm Motion99° @ 17 kt
0–1 km EHI-0.5
Composite Parameters
Sig. Tornado0.0
STP (eff)—
Supercell—
K-Index20.6
Thermo & Levels
PWAT1.68 in
0–3 km LR4.3 °C/km
700–500 LR6.9 °C/km
Total Totals37.9
LCL964 hPa
LFC664 hPa
EL185 hPa
Freezing Lvl16,063 ft