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 7:00 PM

San Jacinto County, Texas, United States

Last updated: 11:23 PM CDT  ·  Refresh
28°C
Feels like 31°
Clear
▲ 34°  /  ▼ 23°
Wind
5 mph S
Humidity
76%
Dew Point
24°
Pressure
29.62 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
0%
Sunrise
6:35 AM
Sunset
8:18 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: San Jacinto County is currently clear at 28°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 1630 J/kg) — isolated convective development possible. Sunrise: 6:35AM · Sunset: 8:18PM.

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
Expires 7:00 PM
37 AQI · Good Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
28°
3%
12 AM
28°
3%
1 AM
27°
3%
2 AM
26°
3%
3 AM
26°
3%
4 AM
25°
3%
5 AM
23°
3%
6 AM
23°
3%
7 AM
23°
3%
8 AM
25°
3%
9 AM
27°
3%
10 AM
28°
3%
11 AM
29°
3%
12 PM
31°
3%
1 PM
33°
3%
2 PM
34°
3%
3 PM
35°
3%
4 PM
35°
3%
5 PM
36°
3%
6 PM
34°
3%
7 PM
33°
3%
8 PM
32°
3%
9 PM
31°
3%
10 PM
30°
3%
7-Day Forecast
Tonight
34° 23°
Clear.
Tue
36° 23°
Mostly Clear.
Wed
37° 24°
Mostly Clear.
Thu
37° 24°
Partly Cloudy.
Fri
38° 24°
Overcast.
Sat
40° 26°
Clear.
Sun
38° 24°
Clear with a 22% chance of rain.
TimeTempConditionsPrecipWindHumidity
Now 28° Clear 3% 5 mph S 76%
12 AM 28° Clear 3% 6 mph SSW 79%
1 AM 27° Clear 3% 6 mph SSW 81%
2 AM 26° Clear 3% 5 mph SSW 85%
3 AM 26° Clear 3% 5 mph SSW 89%
4 AM 25° Mostly Clear 3% 5 mph SSW 92%
5 AM 23° Mostly Clear 3% 5 mph SW 93%
6 AM 23° Mostly Clear 3% 5 mph SW 94%
7 AM 23° Partly Cloudy 3% 5 mph SW 92%
8 AM 25° Partly Cloudy 3% 6 mph SW 84%
9 AM 27° Partly Cloudy 3% 7 mph SW 76%
10 AM 28° Partly Cloudy 3% 7 mph SW 69%
11 AM 29° Mostly Clear 3% 7 mph SW 62%
12 PM 31° Mostly Clear 3% 6 mph SW 55%
1 PM 33° Mostly Clear 3% 6 mph SSW 50%
2 PM 34° Clear 3% 6 mph SSW 47%
3 PM 35° Clear 3% 6 mph SSW 44%
4 PM 35° Clear 3% 6 mph S 44%
5 PM 36° Clear 3% 6 mph S 48%
6 PM 34° Clear 3% 6 mph S 53%
7 PM 33° Clear 3% 7 mph SSE 58%
8 PM 32° Clear 3% 7 mph S 61%
9 PM 31° Clear 3% 7 mph S 64%
10 PM 30° Clear 3% 7 mph S 67%
15-Day Forecast
Today
7/27
Clear
3%
23°
34°
Tue
7/28
Mostly Clear
3%
23°
36°
Wed
7/29
Mostly Clear
7%
24°
37°
Thu
7/30
Partly Cloudy
6%
24°
37°
Fri
7/31
Overcast
8%
24°
38°
Sat
8/1
Clear
17%
26°
40°
Sun
8/2
Clear
22%
24°
38°
Mon
8/3
Rain
13%
22°
38°
Tue
8/4
Clear
29%
21°
37°
Wed
8/5
Clear
44%
23°
38°
Thu
8/6
Drizzle
60%
23°
37°
Fri
8/7
Drizzle
60%
24°
37°
Sat
8/8
Drizzle
60%
24°
37°
Sun
8/9
Drizzle
60%
24°
37°
Mon
8/10
Drizzle
60%
24°
37°
37
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
37 AQI 6.6 µg/m³
O3
Ground-level ozone
35 AQI 39 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 37 Good 35 37
Wed 44 Good 35 44
Thu 57 Moderate 31 57
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 Jul 28, 03:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 50 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE963 J/kg
MLCAPE758 J/kg
MUCAPE1392 J/kg
SBCIN-189 J/kg
MLCIN0 J/kg
Lifted Index-1.6
Kinematics
0–6 km Shear18 kt
0–1 km Shear7 kt
Eff. Shear19 kt
0–1 km SRH45
0–3 km SRH12
Eff. SRH12
Storm Motion308° @ 14 kt
0–1 km EHI0.3
Composite Parameters
Sig. Tornado0.1
STP (eff)0.0
Supercell0.2
K-Index14.2
Thermo & Levels
PWAT1.41 in
0–3 km LR4.7 °C/km
700–500 LR5.4 °C/km
Total Totals33.6
LCL950 hPa
LFC678 hPa
EL174 hPa
Freezing Lvl18,369 ft