National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Webinar on Heavy Rainfall and Flooding Threat for This Week - September 29, 2026

Watch our September 29, 2026, webinar regarding the heavy rainfall and flooding threat for South-Central Texas this week. A new webinar will be available around midday on Wednesday. Read More >

Hazardous Weather Conditions

Current conditions at

Castroville Municipal Airport (KCVB)

Lat: 29.34°NLon: 98.85°WElev: 771ft.

Partly Cloudy

91°F

33°C

Humidity 49%
Wind Speed SE 12 G 17 mph
Barometer 29.87 in
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Heat Index96°F (36°C)
Last update 29 Sep 12:15 pm CDT
Extended Forecast for

LaCoste TX

Flood Watch September 30, 07:00pm until October 2, 07:00pm
Click here for hazard details and duration
Flood Watch

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 94. Heat index values as high as 100. Southeast wind around 10 mph, with gusts as high as 20 mph.

    High: 94 °F

    Mostly Sunny

  • Tonight

    Tonight: A 20 percent chance of showers after 1am. Increasing clouds, with a low around 76. Southeast wind around 15 mph, with gusts as high as 25 mph.

    Low: 76 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Wednesday

    Wednesday: A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 95. Heat index values as high as 103. Southeast wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 30%.

    High: 95 °F

    Slight Chance
    Showers then
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms before 1am, then showers likely and possibly a thunderstorm between 1am and 4am, then showers likely after 4am. Mostly cloudy, with a low around 76. Southeast wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 70%.

    Low: 76 °F

    Chance
    T-storms then
    Showers
    Likely

  • Thursday

    Thursday: Showers, with thunderstorms also possible after 10am. Some of the storms could produce heavy rainfall. High near 88. South southeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 90%.

    High: 88 °F

    Heavy Rain

  • Thursday Night

    Thursday Night: Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Low around 71. East northeast wind around 5 mph. Chance of precipitation is 90%.

    Low: 71 °F

    Heavy Rain

  • Friday

    Friday: Showers and possibly a thunderstorm. High near 81. East northeast wind 5 to 10 mph. Chance of precipitation is 90%.

    High: 81 °F

    Showers

  • Friday Night

    Friday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 68. North northeast wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.

    Low: 68 °F

    Showers
    Likely

  • Saturday

    Saturday: Showers likely, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 81. North northeast wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.

    High: 81 °F

    Showers
    Likely

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 94. Heat index values as high as 100. Southeast wind around 10 mph, with gusts as high as 20 mph.
Tonight
A 20 percent chance of showers after 1am. Increasing clouds, with a low around 76. Southeast wind around 15 mph, with gusts as high as 25 mph.
Wednesday
A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 95. Heat index values as high as 103. Southeast wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 30%.
Wednesday Night
A chance of showers and thunderstorms before 1am, then showers likely and possibly a thunderstorm between 1am and 4am, then showers likely after 4am. Mostly cloudy, with a low around 76. Southeast wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 70%.
Thursday
Showers, with thunderstorms also possible after 10am. Some of the storms could produce heavy rainfall. High near 88. South southeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 90%.
Thursday Night
Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Low around 71. East northeast wind around 5 mph. Chance of precipitation is 90%.
Friday
Showers and possibly a thunderstorm. High near 81. East northeast wind 5 to 10 mph. Chance of precipitation is 90%.
Friday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 68. North northeast wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.
Saturday
Showers likely, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 81. North northeast wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.
Saturday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 69. Chance of precipitation is 40%.
Sunday
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 81.
Sunday Night
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 68.
Monday
A 20 percent chance of showers. Mostly cloudy, with a high near 80.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
LaCoste TX
 29.31°N 98.81°W (Elev. 712 ft)
Last Update:
11:32 am CDT Sep 29, 2026
Forecast Valid:
12pm CDT Sep 29, 2026-6pm CDT Oct 5, 2026
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation