Severe Thunderstorm and Flash Flooding Threats in the South

Organized severe thunderstorms capable of producing mainly large hail and perhaps damaging winds are expected across portions of Louisiana this afternoon with a second round further west tonight. Heavy thunderstorms may lead to flash flooding over portions of the northern Gulf Coast today through Saturday. Several inches of excessive rainfall are possible with Flash Flood Watches in effect. Read More >

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Overcast

82°F

28°C

Humidity 56%
Wind Speed NE 14 mph
Barometer 29.94 in (1013.0 mb)
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Heat Index84°F (29°C)
Last update 13 Apr 1:56 pm CDT
Extended Forecast for

3 Miles WNW San Marcos TX

  • This
    Afternoon

    This Afternoon: A 20 percent chance of showers.  Partly sunny, with a high near 78. North northeast wind around 10 mph.

    Slight Chance
    Showers

    High: 78 °F

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms.  Mostly cloudy, with a low around 65. North northeast wind 5 to 10 mph.

    Chance
    T-storms

    Low: 65 °F

  • Wednesday

    Wednesday: A 30 percent chance of showers and thunderstorms, mainly after 1pm.  Mostly cloudy, with a high near 79. North northeast wind 5 to 10 mph.

    Chance
    T-storms

    High: 79 °F

  • Wednesday
    Night

    Wednesday Night: A 30 percent chance of showers and thunderstorms.  Mostly cloudy, with a low around 59. North northeast wind around 10 mph.

    Chance
    T-storms

    Low: 59 °F

  • Thursday

    Thursday: A 40 percent chance of showers and thunderstorms, mainly after 1pm.  Cloudy, with a high near 71. North northeast wind around 10 mph, with gusts as high as 20 mph.

    Chance
    T-storms

    High: 71 °F

  • Thursday
    Night

    Thursday Night: A 30 percent chance of showers and thunderstorms, mainly after 1am.  Cloudy, with a low around 62. East northeast wind 5 to 10 mph.

    Chance
    T-storms

    Low: 62 °F

  • Friday

    Friday: A 50 percent chance of showers and thunderstorms.  Cloudy, with a high near 79. East wind around 5 mph becoming southwest in the afternoon.

    Chance
    T-storms

    High: 79 °F

  • Friday
    Night

    Friday Night: A 30 percent chance of showers and thunderstorms.  Mostly cloudy, with a low around 53. North wind 5 to 15 mph, with gusts as high as 25 mph.

    Chance
    T-storms

    Low: 53 °F

  • Saturday

    Saturday: A 30 percent chance of showers.  Mostly cloudy, with a high near 65. North northeast wind 15 to 20 mph, with gusts as high as 25 mph.

    Chance
    Showers

    High: 65 °F

Detailed Forecast

This Afternoon
A 20 percent chance of showers. Partly sunny, with a high near 78. North northeast wind around 10 mph.
Tonight
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 65. North northeast wind 5 to 10 mph.
Wednesday
A 30 percent chance of showers and thunderstorms, mainly after 1pm. Mostly cloudy, with a high near 79. North northeast wind 5 to 10 mph.
Wednesday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 59. North northeast wind around 10 mph.
Thursday
A 40 percent chance of showers and thunderstorms, mainly after 1pm. Cloudy, with a high near 71. North northeast wind around 10 mph, with gusts as high as 20 mph.
Thursday Night
A 30 percent chance of showers and thunderstorms, mainly after 1am. Cloudy, with a low around 62. East northeast wind 5 to 10 mph.
Friday
A 50 percent chance of showers and thunderstorms. Cloudy, with a high near 79. East wind around 5 mph becoming southwest in the afternoon.
Friday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 53. North wind 5 to 15 mph, with gusts as high as 25 mph.
Saturday
A 30 percent chance of showers. Mostly cloudy, with a high near 65. North northeast wind 15 to 20 mph, with gusts as high as 25 mph.
Saturday Night
A 20 percent chance of showers before 1am. Mostly cloudy, with a low around 49.
Sunday
A 20 percent chance of showers. Partly sunny, with a high near 67.
Sunday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 49.
Monday
A 20 percent chance of showers. Partly sunny, with a high near 71.
Click Map For Forecast
Point Forecast:
3 Miles WNW San Marcos TX
 29.9°N 97.97°W (Elev. 686 ft)
2:15 pm CDT Apr 13, 2021
2pm CDT Apr 13, 2021-6pm CDT Apr 19, 2021
 
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Additional Resources

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Hourly Weather Forecast

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