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: 3:40 AM CDT  ·  Refresh
26°C
Feels like 29°
Mostly Clear
▲ 39°  /  ▼ 23°
Wind
11 mph SSW
Humidity
89%
Dew Point
24°
Pressure
29.66 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
15%
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 1658 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%
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°
4%
11 AM
31°
4%
12 PM
32°
5%
1 PM
36°
5%
2 PM
37°
5%
3 PM
38°
5%
4 PM
38°
5%
5 PM
39°
5%
6 PM
38°
5%
7 PM
37°
5%
8 PM
35°
5%
9 PM
34°
5%
10 PM
32°
3%
11 PM
31°
3%
12 AM
30°
3%
1 AM
30°
3%
2 AM
29°
3%
7-Day Forecast
Today
39° 23°
Partly Cloudy.
Wed
41° 23°
Clear.
Thu
41° 24°
Clear with a 57% chance of rain.
Fri
39° 23°
Partly Cloudy with a 42% chance of rain.
Sat
40° 23°
Clear.
Sun
39° 23°
Clear.
Mon
39° 22°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 26° Mostly Clear 3% 11 mph SSW 89%
4 AM 27° Clear 3% 9 mph SSW 91%
5 AM 23° Mostly Clear 3% 8 mph SSW 93%
6 AM 23° Mostly Clear 3% 6 mph SSW 95%
7 AM 24° Partly Cloudy 3% 7 mph SSW 90%
8 AM 26° Partly Cloudy 3% 8 mph SW 80%
9 AM 27° Partly Cloudy 3% 9 mph SW 71%
10 AM 28° Partly Cloudy 4% 8 mph SW 61%
11 AM 31° Mostly Clear 4% 7 mph SW 51%
12 PM 32° Mostly Clear 5% 6 mph SW 42%
1 PM 36° Clear 5% 5 mph SSW 36%
2 PM 37° Mostly Clear 5% 6 mph S 33%
3 PM 38° Partly Cloudy 5% 6 mph S 30%
4 PM 38° Mostly Clear 5% 7 mph SSE 31%
5 PM 39° Mostly Clear 5% 9 mph SSE 32%
6 PM 38° Mostly Clear 5% 10 mph SSE 34%
7 PM 37° Partly Cloudy 5% 10 mph SSE 39%
8 PM 35° Mostly Clear 5% 11 mph S 46%
9 PM 34° Mostly Clear 5% 13 mph S 53%
10 PM 32° Mostly Clear 3% 12 mph S 60%
11 PM 31° Mostly Clear 3% 11 mph S 65%
12 AM 30° Mostly Clear 3% 10 mph SSW 69%
1 AM 30° Partly Cloudy 3% 10 mph SSW 73%
2 AM 29° Partly Cloudy 3% 9 mph SSW 77%
15-Day Forecast
Today
8/25
Partly Cloudy
5%
23°
39°
Wed
8/26
Clear
12%
23°
41°
Thu
8/27
Clear
57%
24°
41°
Fri
8/28
Partly Cloudy
42%
23°
39°
Sat
8/29
Clear
8%
23°
40°
Sun
8/30
Clear
3%
23°
39°
Mon
8/31
Clear
3%
22°
39°
Tue
9/1
Clear
18%
22°
39°
Wed
9/2
Drizzle
44%
22°
40°
Thu
9/3
Clear
36%
23°
39°
Fri
9/4
Clear
60%
24°
40°
Sat
9/5
Clear
60%
23°
39°
Sun
9/6
Drizzle
60%
23°
38°
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, 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
SBCAPE1558 J/kg
MLCAPE655 J/kg
MUCAPE1558 J/kg
SBCIN-345 J/kg
MLCIN-461 J/kg
Lifted Index-5.0
Kinematics
0–6 km Shear23 kt
0–1 km Shear9 kt
Eff. Shear—
0–1 km SRH-39
0–3 km SRH-8
Eff. SRH—
Storm Motion112° @ 18 kt
0–1 km EHI-0.4
Composite Parameters
Sig. Tornado0.0
STP (eff)—
Supercell—
K-Index19.7
Thermo & Levels
PWAT1.56 in
0–3 km LR4.1 °C/km
700–500 LR7.2 °C/km
Total Totals40.2
LCL968 hPa
LFC655 hPa
EL178 hPa
Freezing Lvl16,122 ft