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

Matagorda Island National Wildlife Refuge, Calhoun County, Texas, United States

Last updated: 3:43 AM CDT  ·  Refresh
29°C
Feels like 35°
Partly Cloudy
▲ 31°  /  ▼ 28°
Wind
14 mph S
Humidity
85%
Dew Point
26°
Pressure
29.96 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
32%
Sunrise
7:01 AM
Sunset
7:55 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Matagorda Island National Wildlife Refuge is currently partly cloudy at 29°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 3090 J/kg) — isolated convective development possible. Sunrise: 7:01AM · Sunset: 7:55PM.

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
29°
3%
4 AM
28°
3%
5 AM
27°
3%
6 AM
27°
3%
7 AM
28°
3%
8 AM
28°
3%
9 AM
30°
3%
10 AM
30°
3%
11 AM
30°
3%
12 PM
31°
3%
1 PM
31°
3%
2 PM
31°
3%
3 PM
31°
3%
4 PM
31°
3%
5 PM
30°
3%
6 PM
30°
3%
7 PM
29°
3%
8 PM
29°
3%
9 PM
29°
3%
10 PM
29°
3%
11 PM
29°
3%
12 AM
29°
3%
1 AM
28°
3%
2 AM
28°
3%
7-Day Forecast
Today
31° 28°
Mostly Clear.
Wed
32° 28°
Mostly Clear.
Thu
32° 27°
Mostly Clear.
Fri
32° 28°
Clear with a 37% chance of rain.
Sat
32° 27°
Thunderstorm, 51% chance.
Sun
32° 27°
Thunderstorm, 43% chance.
Mon
32° 27°
Clear with a 28% chance of rain.
TimeTempConditionsPrecipWindHumidity
Now 29° Partly Cloudy 3% 14 mph S 85%
4 AM 28° Partly Cloudy 3% 14 mph SSW 82%
5 AM 27° Mostly Clear 3% 14 mph SSW 81%
6 AM 27° Mostly Clear 3% 13 mph SSW 80%
7 AM 28° Mostly Clear 3% 12 mph SSW 78%
8 AM 28° Mostly Clear 3% 11 mph SSW 76%
9 AM 30° Mostly Clear 3% 10 mph SSW 74%
10 AM 30° Mostly Clear 3% 9 mph S 73%
11 AM 30° Clear 3% 9 mph S 73%
12 PM 31° Clear 3% 9 mph S 73%
1 PM 31° Mostly Clear 3% 9 mph SSE 73%
2 PM 31° Mostly Clear 3% 10 mph SSE 73%
3 PM 31° Mostly Clear 3% 11 mph SE 73%
4 PM 31° Mostly Clear 3% 12 mph SE 74%
5 PM 30° Mostly Clear 3% 13 mph SE 75%
6 PM 30° Clear 3% 14 mph SE 76%
7 PM 29° Clear 3% 15 mph SSE 76%
8 PM 29° Clear 3% 16 mph SSE 76%
9 PM 29° Clear 3% 16 mph SSE 76%
10 PM 29° Clear 3% 16 mph SSE 77%
11 PM 29° Clear 3% 16 mph SSE 77%
12 AM 29° Clear 3% 15 mph S 78%
1 AM 28° Clear 3% 15 mph S 78%
2 AM 28° Mostly Clear 3% 14 mph S 79%
15-Day Forecast
Today
8/25
Mostly Clear
3%
28°
31°
Wed
8/26
Mostly Clear
3%
28°
32°
Thu
8/27
Mostly Clear
3%
27°
32°
Fri
8/28
Clear
37%
28°
32°
Sat
8/29
Thunderstorm
51%
27°
32°
Sun
8/30
Thunderstorm
43%
27°
32°
Mon
8/31
Clear
28%
27°
32°
Tue
9/1
Drizzle
42%
27°
32°
Wed
9/2
Clear
19%
27°
33°
Thu
9/3
Clear
27%
27°
33°
Fri
9/4
Drizzle
60%
27°
34°
Sat
9/5
Drizzle
60%
27°
34°
Sun
9/6
Rain
90%
27°
33°
Mon
9/7
Rain
90%
27°
33°
Tue
9/8
Drizzle
60%
28°
33°
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 10.8 µg/m³
O3
Ground-level ozone
24 AQI 27 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 54 Moderate 24 54
Wed 56 Moderate 22 56
Thu 52 Moderate 27 52
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
SBCAPE3345 J/kg
MLCAPE2067 J/kg
MUCAPE3345 J/kg
SBCIN-32 J/kg
MLCIN-101 J/kg
Lifted Index-6.9
Kinematics
0–6 km Shear32 kt
0–1 km Shear6 kt
Eff. Shear26 kt
0–1 km SRH-36
0–3 km SRH22
Eff. SRH22
Storm Motion126° @ 25 kt
0–1 km EHI-0.8
Composite Parameters
Sig. Tornado0.0
STP (eff)0.1
Supercell1.0
K-Index13.6
Thermo & Levels
PWAT1.58 in
0–3 km LR5.0 °C/km
700–500 LR6.6 °C/km
Total Totals39.9
LCL973 hPa
LFC787 hPa
EL137 hPa
Freezing Lvl16,736 ft