Severe Thunderstorms in the Southern Plains; Heavy to Excessive Rainfall in South Central Texas

Widespread rain may produce flash flooding across the Southern Plains into the Ozarks today. Numerous instances of flash flooding are expected in south-central Texas, including the Hill Country. There will also be a risk of isolated severe thunderstorms across the southern Plains today, where an instance or two of severe wind, hail, or a brief tornado may occur. Read More >

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Overcast

74°F

23°C

Humidity 88%
Wind Speed S 13 mph
Barometer 30.02 in (1016.0 mb)
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Last update 20 Nov 7:56 am CST
Extended Forecast for

2 Miles SSW Lockhart TX

  • Today

    Today: A chance of showers, with thunderstorms also possible after 3pm.  Mostly cloudy, with a high near 83. South southeast wind 10 to 15 mph, with gusts as high as 25 mph.  Chance of precipitation is 40%.

    High: 83 °F

    Slight Chance
    Showers then
    Chance
    T-storms

  • Tonight

    Tonight: A 50 percent chance of showers and thunderstorms.  Increasing clouds, with a low around 65. Southeast wind 5 to 10 mph becoming east northeast in the evening. Winds could gust as high as 20 mph.  New rainfall amounts between a half and three quarters of an inch possible.

    Low: 65 °F

    Chance
    T-storms then
    Chance
    Showers

  • Friday

    Friday: Showers likely and possibly a thunderstorm before noon, then a slight chance of showers between noon and 3pm, then a slight chance of showers and thunderstorms after 3pm.  Partly sunny, with a high near 81. South southwest wind around 5 mph becoming north in the afternoon.  Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 81 °F

    Showers
    Likely then
    Slight Chance
    T-storms

  • Friday Night

    Friday Night: A 30 percent chance of showers and thunderstorms, mainly after midnight.  Partly cloudy, with a low around 62. Calm wind becoming north northeast around 5 mph after midnight.

    Low: 62 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Saturday

    Saturday: A 40 percent chance of showers.  Partly sunny, with a high near 79. North northeast wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 79 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: A 30 percent chance of showers.  Mostly cloudy, with a low around 62. East northeast wind 5 to 10 mph.

    Low: 62 °F

    Chance
    Showers

  • Sunday

    Sunday: A chance of showers, with thunderstorms also possible after noon.  Mostly cloudy, with a high near 80. South southeast wind 10 to 15 mph, with gusts as high as 20 mph.  Chance of precipitation is 40%.

    High: 80 °F

    Chance
    Showers

  • Sunday Night

    Sunday Night: A 40 percent chance of showers and thunderstorms.  Mostly cloudy, with a low around 62. South southeast wind around 10 mph, with gusts as high as 20 mph.

    Low: 62 °F

    Chance
    T-storms

  • Monday

    Monday: Showers likely and possibly a thunderstorm.  Partly sunny, with a high near 75. South wind around 10 mph becoming north northwest in the afternoon. Winds could gust as high as 20 mph.  Chance of precipitation is 70%.

    High: 75 °F

    Showers
    Likely

Detailed Forecast

Today
A chance of showers, with thunderstorms also possible after 3pm. Mostly cloudy, with a high near 83. South southeast wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 40%.
Tonight
A 50 percent chance of showers and thunderstorms. Increasing clouds, with a low around 65. Southeast wind 5 to 10 mph becoming east northeast in the evening. Winds could gust as high as 20 mph. New rainfall amounts between a half and three quarters of an inch possible.
Friday
Showers likely and possibly a thunderstorm before noon, then a slight chance of showers between noon and 3pm, then a slight chance of showers and thunderstorms after 3pm. Partly sunny, with a high near 81. South southwest wind around 5 mph becoming north in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday Night
A 30 percent chance of showers and thunderstorms, mainly after midnight. Partly cloudy, with a low around 62. Calm wind becoming north northeast around 5 mph after midnight.
Saturday
A 40 percent chance of showers. Partly sunny, with a high near 79. North northeast wind 5 to 10 mph, with gusts as high as 20 mph.
Saturday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 62. East northeast wind 5 to 10 mph.
Sunday
A chance of showers, with thunderstorms also possible after noon. Mostly cloudy, with a high near 80. South southeast wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 40%.
Sunday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 62. South southeast wind around 10 mph, with gusts as high as 20 mph.
Monday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 75. South wind around 10 mph becoming north northwest in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 70%.
Monday Night
A 20 percent chance of showers before midnight. Mostly clear, with a low around 48.
Tuesday
Sunny, with a high near 76.
Tuesday Night
Mostly clear, with a low around 49.
Wednesday
A 20 percent chance of showers. Mostly sunny, with a high near 71.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SSW Lockhart TX
 29.86°N 97.7°W (Elev. 545 ft)
5:42 am CST Nov 20, 2025
7am CST Nov 20, 2025-6pm CST Nov 26, 2025
 
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Additional Resources

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