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

Grimes County, Texas, United States

Last updated: 4:59 AM CDT  ·  Refresh
26°C
Feels like 29°
Mostly Clear
▲ 38°  /  ▼ 23°
Wind
9 mph SSW
Humidity
93%
Dew Point
24°
Pressure
29.66 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
11%
Sunrise
6:56 AM
Sunset
7:54 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Grimes County is currently mostly clear at 26°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 1664 J/kg) — isolated convective development possible. Sunrise: 6:56AM · Sunset: 7:54PM.

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
54 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
26°
3%
5 AM
23°
14%
6 AM
23°
14%
7 AM
24°
14%
8 AM
26°
14%
9 AM
27°
14%
10 AM
29°
16%
11 AM
31°
17%
12 PM
33°
4%
1 PM
36°
5%
2 PM
37°
5%
3 PM
38°
5%
4 PM
38°
5%
5 PM
38°
5%
6 PM
38°
5%
7 PM
36°
5%
8 PM
34°
5%
9 PM
33°
3%
10 PM
32°
3%
11 PM
30°
3%
12 AM
29°
3%
1 AM
29°
3%
2 AM
29°
3%
3 AM
28°
3%
7-Day Forecast
Today
38° 23°
Mostly Clear.
Wed
41° 23°
Mostly Clear with a 26% chance of rain.
Thu
41° 23°
Partly Cloudy with a 60% chance of rain.
Fri
40° 23°
Partly Cloudy with a 44% chance of rain.
Sat
40° 23°
Clear.
Sun
40° 23°
Clear.
Mon
39° 22°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 26° Mostly Clear 3% 9 mph SSW 93%
5 AM 23° Mostly Clear 14% 8 mph SSW 93%
6 AM 23° Mostly Clear 14% 6 mph SSW 95%
7 AM 24° Partly Cloudy 14% 8 mph SW 87%
8 AM 26° Partly Cloudy 14% 9 mph SW 77%
9 AM 27° Partly Cloudy 14% 9 mph SW 68%
10 AM 29° Partly Cloudy 16% 7 mph SW 59%
11 AM 31° Mostly Clear 17% 6 mph SW 50%
12 PM 33° Clear 4% 5 mph SW 41%
1 PM 36° Clear 5% 5 mph SSW 37%
2 PM 37° Clear 5% 6 mph S 33%
3 PM 38° Partly Cloudy 5% 7 mph SSE 30%
4 PM 38° Partly Cloudy 5% 8 mph SSE 31%
5 PM 38° Partly Cloudy 5% 9 mph SSE 33%
6 PM 38° Clear 5% 10 mph SSE 34%
7 PM 36° Partly Cloudy 5% 10 mph SSE 41%
8 PM 34° Partly Cloudy 5% 11 mph S 48%
9 PM 33° Partly Cloudy 3% 12 mph S 54%
10 PM 32° Partly Cloudy 3% 11 mph S 59%
11 PM 30° Partly Cloudy 3% 11 mph S 64%
12 AM 29° Partly Cloudy 3% 11 mph SSW 67%
1 AM 29° Partly Cloudy 3% 10 mph SSW 71%
2 AM 29° Partly Cloudy 3% 9 mph SSW 76%
3 AM 28° Partly Cloudy 3% 8 mph SSW 81%
15-Day Forecast
Today
8/25
Mostly Clear
16%
23°
38°
Wed
8/26
Mostly Clear
26%
23°
41°
Thu
8/27
Partly Cloudy
60%
23°
41°
Fri
8/28
Partly Cloudy
44%
23°
40°
Sat
8/29
Clear
3%
23°
40°
Sun
8/30
Clear
3%
23°
40°
Mon
8/31
Clear
3%
22°
39°
Tue
9/1
Clear
18%
22°
39°
Wed
9/2
Drizzle
44%
22°
41°
Thu
9/3
Clear
36%
22°
39°
Fri
9/4
Clear
25%
24°
40°
Sat
9/5
Drizzle
60%
23°
40°
Sun
9/6
Drizzle
60%
23°
39°
Mon
9/7
Drizzle
60%
24°
38°
Tue
9/8
Drizzle
60%
24°
38°
54
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
54 AQI 10.9 µg/m³
O3
Ground-level ozone
43 AQI 47 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 54 Moderate 43 54
Wed 49 Good 39 49
Thu 53 Moderate 37 53
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, 08:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE1633 J/kg
MLCAPE795 J/kg
MUCAPE1799 J/kg
SBCIN-325 J/kg
MLCIN-430 J/kg
Lifted Index-5.1
Kinematics
0–6 km Shear20 kt
0–1 km Shear11 kt
Eff. Shear—
0–1 km SRH-36
0–3 km SRH-16
Eff. SRH—
Storm Motion111° @ 18 kt
0–1 km EHI-0.4
Composite Parameters
Sig. Tornado0.0
STP (eff)—
Supercell—
K-Index20.5
Thermo & Levels
PWAT1.56 in
0–3 km LR3.9 °C/km
700–500 LR7.2 °C/km
Total Totals41.3
LCL978 hPa
LFC665 hPa
EL177 hPa
Freezing Lvl15,928 ft