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Severe Thunderstorms in Texas; Critical Fire Weather in the Southwest

Organized severe thunderstorms are possible across parts of southwestern Texas into southeastern Oklahoma today, with a threat for very large hail and damaging wind gusts. Elevated to critical fire weather conditions are forecast Tuesday from southern Nevada into the Four Corners region then Wednesday and Thursday centered over the Four Corners region. Read More >

Hazardous Weather Conditions

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Overcast

80°F

27°C

Humidity 62%
Wind Speed S 15 mph
Barometer 29.83 in (1009.3 mb)
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Heat Index82°F (28°C)
Last update 12 Apr 11:56 am CDT
Extended Forecast for

San Marcos TX

  • This
    Afternoon

    This Afternoon: Partly sunny, with a high near 88. South southeast wind around 10 mph.

    Partly Sunny

    High: 88 °F

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms after 10pm. Increasing clouds, with a low around 64. Southeast wind 5 to 15 mph, with gusts as high as 20 mph.

    Slight Chance
    T-storms

    Low: 64 °F

  • Tuesday

    Tuesday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 77. North northeast wind 10 to 15 mph, with gusts as high as 20 mph.

    Cloudy then
    Slight Chance
    T-storms

    High: 77 °F

  • Tuesday
    Night

    Tuesday Night: A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 64. North northeast wind 5 to 10 mph, with gusts as high as 20 mph.

    Slight Chance
    T-storms

    Low: 64 °F

  • Wednesday

    Wednesday: A 20 percent chance of showers and thunderstorms. Cloudy, with a high near 77. North northeast wind 10 to 15 mph, with gusts as high as 20 mph.

    Slight Chance
    T-storms

    High: 77 °F

  • Wednesday
    Night

    Wednesday Night: A 20 percent chance of showers and thunderstorms. Cloudy, with a low around 61. Northeast wind 10 to 15 mph, with gusts as high as 20 mph.

    Slight Chance
    T-storms

    Low: 61 °F

  • Thursday

    Thursday: A 20 percent chance of showers and thunderstorms after 1pm. Cloudy, with a high near 75. Northeast wind 10 to 15 mph, with gusts as high as 20 mph.

    Cloudy then
    Slight Chance
    T-storms

    High: 75 °F

  • Thursday
    Night

    Thursday Night: A 20 percent chance of showers and thunderstorms. Cloudy, with a low around 62. East wind 5 to 10 mph.

    Slight Chance
    T-storms

    Low: 62 °F

  • Friday

    Friday: A 50 percent chance of showers and thunderstorms. Cloudy, with a high near 74. East wind 5 to 10 mph.

    Chance
    T-storms

    High: 74 °F

Detailed Forecast

This Afternoon
Partly sunny, with a high near 88. South southeast wind around 10 mph.
Tonight
A 20 percent chance of showers and thunderstorms after 10pm. Increasing clouds, with a low around 64. Southeast wind 5 to 15 mph, with gusts as high as 20 mph.
Tuesday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 77. North northeast wind 10 to 15 mph, with gusts as high as 20 mph.
Tuesday Night
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 64. North northeast wind 5 to 10 mph, with gusts as high as 20 mph.
Wednesday
A 20 percent chance of showers and thunderstorms. Cloudy, with a high near 77. North northeast wind 10 to 15 mph, with gusts as high as 20 mph.
Wednesday Night
A 20 percent chance of showers and thunderstorms. Cloudy, with a low around 61. Northeast wind 10 to 15 mph, with gusts as high as 20 mph.
Thursday
A 20 percent chance of showers and thunderstorms after 1pm. Cloudy, with a high near 75. Northeast wind 10 to 15 mph, with gusts as high as 20 mph.
Thursday Night
A 20 percent chance of showers and thunderstorms. Cloudy, with a low around 62. East wind 5 to 10 mph.
Friday
A 50 percent chance of showers and thunderstorms. Cloudy, with a high near 74. East wind 5 to 10 mph.
Friday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 57.
Saturday
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 68.
Saturday Night
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 52.
Sunday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 69.
Click Map For Forecast
Disclaimer
Map Legend
Point Forecast:
San Marcos TX
 29.88°N 97.94°W (Elev. 577 ft)
Last Update:
12:02 pm CDT Apr 12, 2021
Forecast Valid:
12pm CDT Apr 12, 2021-6pm CDT Apr 18, 2021
 
Forecast Discussion
 
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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