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

Grimes County, Texas, United States

Last updated: 9:35 PM CDT  ·  Refresh
31°C
Feels like 34°
Clear
▲ 35°  /  ▼ 22°
Wind
9 mph S
Humidity
61%
Dew Point
22°
Pressure
29.55 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
1%
Sunrise
6:39 AM
Sunset
8:21 PM
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WeatherAI™ Analysis

WeatherAI Analysis: Grimes County is currently clear at 31°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 1011 J/kg) — isolated convective development possible. Sunrise: 6:39AM · Sunset: 8:21PM.

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
40 AQI · Good Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
31°
3%
10 PM
30°
3%
11 PM
29°
3%
12 AM
28°
3%
1 AM
27°
3%
2 AM
26°
3%
3 AM
25°
3%
4 AM
24°
3%
5 AM
23°
6%
6 AM
22°
6%
7 AM
23°
6%
8 AM
25°
3%
9 AM
27°
3%
10 AM
28°
3%
11 AM
31°
3%
12 PM
32°
3%
1 PM
34°
3%
2 PM
35°
3%
3 PM
36°
3%
4 PM
37°
3%
5 PM
36°
3%
6 PM
35°
3%
7 PM
34°
3%
8 PM
33°
3%
7-Day Forecast
Tonight
35° 22°
Clear.
Tue
38° 22°
Mostly Clear.
Wed
38° 23°
Partly Cloudy.
Thu
38° 24°
Mostly Clear.
Fri
39° 23°
Clear.
Sat
41° 25°
Clear.
Sun
39° 24°
Clear with a 22% chance of rain.
TimeTempConditionsPrecipWindHumidity
Now 31° Clear 3% 9 mph S 61%
10 PM 30° Clear 3% 10 mph S 65%
11 PM 29° Clear 3% 10 mph S 72%
12 AM 28° Clear 3% 9 mph S 80%
1 AM 27° Clear 3% 8 mph SSW 85%
2 AM 26° Mostly Clear 3% 8 mph SSW 89%
3 AM 25° Mostly Clear 3% 7 mph SSW 93%
4 AM 24° Partly Cloudy 3% 7 mph SSW 94%
5 AM 23° Partly Cloudy 6% 7 mph SSW 94%
6 AM 22° Partly Cloudy 6% 6 mph SSW 95%
7 AM 23° Partly Cloudy 6% 8 mph SSW 91%
8 AM 25° Partly Cloudy 3% 10 mph SW 84%
9 AM 27° Partly Cloudy 3% 10 mph SW 77%
10 AM 28° Partly Cloudy 3% 10 mph SW 69%
11 AM 31° Mostly Clear 3% 10 mph SW 61%
12 PM 32° Mostly Clear 3% 9 mph SW 53%
1 PM 34° Mostly Clear 3% 8 mph SSW 48%
2 PM 35° Mostly Clear 3% 8 mph SSW 45%
3 PM 36° Mostly Clear 3% 9 mph SSW 41%
4 PM 37° Mostly Clear 3% 9 mph SSW 41%
5 PM 36° Mostly Clear 3% 9 mph S 43%
6 PM 35° Mostly Clear 3% 10 mph S 45%
7 PM 34° Mostly Clear 3% 10 mph S 49%
8 PM 33° Mostly Clear 3% 11 mph S 54%
15-Day Forecast
Today
7/27
Clear
3%
22°
35°
Tue
7/28
Mostly Clear
6%
22°
38°
Wed
7/29
Partly Cloudy
18%
23°
38°
Thu
7/30
Mostly Clear
3%
24°
38°
Fri
7/31
Clear
3%
23°
39°
Sat
8/1
Clear
17%
25°
41°
Sun
8/2
Clear
22%
24°
39°
Mon
8/3
Clear
18%
22°
40°
Tue
8/4
Rain
29%
22°
38°
Wed
8/5
Clear
44%
23°
39°
Thu
8/6
Drizzle
60%
23°
37°
Fri
8/7
Drizzle
60%
23°
38°
Sat
8/8
Clear
25%
23°
38°
Sun
8/9
Clear
60%
23°
38°
Mon
8/10
Drizzle
60%
23°
38°
40
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
40 AQI 7.2 µg/m³
O3
Ground-level ozone
27 AQI 29 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 40 Good 27 40
Wed 51 Moderate 25 51
Thu 59 Moderate 25 59
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, 01:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE633 J/kg
MLCAPE1004 J/kg
MUCAPE1468 J/kg
SBCIN-327 J/kg
MLCIN0 J/kg
Lifted Index-0.4
Kinematics
0–6 km Shear22 kt
0–1 km Shear5 kt
Eff. Shear31 kt
0–1 km SRH36
0–3 km SRH9
Eff. SRH-30
Storm Motion302° @ 14 kt
0–1 km EHI0.1
Composite Parameters
Sig. Tornado0.1
STP (eff)0.0
Supercell0.0
K-Index16.2
Thermo & Levels
PWAT1.52 in
0–3 km LR5.6 °C/km
700–500 LR5.6 °C/km
Total Totals37.2
LCL877 hPa
LFC514 hPa
EL200 hPa
Freezing Lvl18,248 ft