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

Grimes County, Texas, United States

Last updated: 3:52 PM CDT  ·  Refresh
36°C
Feels like 41°
Mostly Clear
▲ 37°  /  ▼ 24°
Wind
10 mph S
Humidity
43%
Dew Point
21°
Pressure
29.62 inHg
Visibility
10 mi
UV Index
7.8
Cloud Cover
30%
Sunrise
7:06 AM
Sunset
7:31 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Grimes County is currently mostly clear at 36°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 2890 J/kg) — isolated convective development possible. Sunrise: 7:06AM · Sunset: 7:31PM.

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
29 AQI · Good Dominant: O3 Air Quality
Hourly Forecast · Next 24 Hours
Now
36°
4%
4 PM
36°
5%
5 PM
37°
5%
6 PM
34°
5%
7 PM
33°
5%
8 PM
31°
5%
9 PM
29°
5%
10 PM
29°
3%
11 PM
28°
7%
12 AM
27°
6%
1 AM
27°
7%
2 AM
26°
7%
3 AM
26°
7%
4 AM
26°
9%
5 AM
24°
9%
6 AM
24°
15%
7 AM
24°
21%
8 AM
26°
26%
9 AM
27°
27%
10 AM
30°
38%
11 AM
31°
27%
12 PM
32°
29%
1 PM
33°
29%
2 PM
33°
29%
7-Day Forecast
Today
37° 24°
Partly Cloudy.
Mon
37° 24°
Partly Cloudy with a 33% chance of rain.
Tue
37° 24°
Mostly Cloudy.
Wed
35° 23°
Partly Cloudy.
Thu
36° 23°
Clear.
Fri
36° 22°
Clear.
Sat
36° 22°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 36° Mostly Clear 4% 10 mph S 43%
4 PM 36° Partly Cloudy 5% 10 mph SSE 42%
5 PM 37° Partly Cloudy 5% 10 mph SSE 44%
6 PM 34° Partly Cloudy 5% 12 mph SSE 49%
7 PM 33° Partly Cloudy 5% 11 mph SSE 58%
8 PM 31° Mostly Clear 5% 10 mph SSE 65%
9 PM 29° Mostly Clear 5% 9 mph S 71%
10 PM 29° Partly Cloudy 3% 9 mph S 76%
11 PM 28° Mostly Clear 7% 8 mph S 80%
12 AM 27° Mostly Clear 6% 8 mph S 85%
1 AM 27° Mostly Clear 7% 7 mph S 87%
2 AM 26° Mostly Clear 7% 6 mph S 89%
3 AM 26° Mostly Clear 7% 6 mph SSE 91%
4 AM 26° Partly Cloudy 9% 5 mph SSE 92%
5 AM 24° Partly Cloudy 9% 4 mph SSE 93%
6 AM 24° Partly Cloudy 15% 4 mph SSE 94%
7 AM 24° Partly Cloudy 21% 4 mph SSE 91%
8 AM 26° Partly Cloudy 26% 5 mph SSE 84%
9 AM 27° Rain 27% 5 mph SSE 81%
10 AM 30° Partly Cloudy 38% 6 mph SSE 74%
11 AM 31° Partly Cloudy 27% 6 mph SSE 67%
12 PM 32° Partly Cloudy 29% 7 mph S 60%
1 PM 33° Partly Cloudy 29% 7 mph SSE 58%
2 PM 33° Partly Cloudy 29% 8 mph SSE 58%
15-Day Forecast
Today
9/13
Partly Cloudy
5%
24°
37°
Mon
9/14
Partly Cloudy
33%
24°
37°
Tue
9/15
Mostly Cloudy
3%
24°
37°
Wed
9/16
Partly Cloudy
12%
23°
35°
Thu
9/17
Clear
3%
23°
36°
Fri
9/18
Clear
3%
22°
36°
Sat
9/19
Clear
19%
22°
36°
Sun
9/20
Clear
60%
22°
36°
Mon
9/21
Drizzle
60%
22°
35°
Tue
9/22
Drizzle
60%
21°
33°
Wed
9/23
Drizzle
60%
21°
33°
Thu
9/24
Drizzle
60%
21°
33°
Fri
9/25
Drizzle
60%
21°
33°
Sat
9/26
Clear
25%
20°
33°
Sun
9/27
Clear
60%
20°
33°
29
Good
U.S. Air Quality Index · Dominant: O3
50 100 150 200

Air quality is satisfactory and poses little or no health risk.

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
28 AQI 5.2 µg/m³
O3
Ground-level ozone
Dominant
29 AQI 31 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Mon 29 Good 29 28
Tue 34 Good 34 27
Wed 36 Good 36 32
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
SBCAPE2692 J/kg
MLCAPE1593 J/kg
MUCAPE2692 J/kg
SBCIN0 J/kg
MLCIN-8 J/kg
Lifted Index-4.5
Kinematics
0–6 km Shear4 kt
0–1 km Shear1 kt
Eff. Shear14 kt
0–1 km SRH-1
0–3 km SRH12
Eff. SRH12
Storm Motion129° @ 17 kt
0–1 km EHI-0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index32.3
Thermo & Levels
PWAT1.75 in
0–3 km LR8.7 °C/km
700–500 LR5.1 °C/km
Total Totals44.6
LCL812 hPa
LFC1003 hPa
EL149 hPa
Freezing Lvl16,358 ft