Preview of NWS' New Point Forecast Icons
Effective July 7, 2015, NWS will implement changes to the icons depicted on all of its Point Forecast pages. Highlights will include new icons with increased clarity, 6-hour increments for rapidly changing weather and new color blocks to highlight forecast hazards.

You may preview these updates in real time for this location. View additional details, and send any comments to icons@noaa.gov.

Please note the preview site is not operational, so performance may be slow during periods of peak access.

Severe weather possible for parts of eastern, north-central and southwestern U.S.

The NWS Storm Prediction Center is forecasting a risk of severe thunderstorms Tuesday afternoon across a large portion of the eastern U.S. from the Mid-Atlantic & Ohio Valley into the Deep South. Severe thunderstorms are also possible across parts of the northern Plains & southern Ariz. Damaging wind gusts & large hail will be the main threats with severe thunderstorms that develop in these areas.
Read More...

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Fog/Mist

88°F

31°C

Humidity 62%
Wind Speed SW 9 mph
Barometer 30.05 in
Dewpoint 73°F (23°C)
Visibility 6.00 mi
Heat Index96°F (36°C)
Last update 30 Jun 11:45 am CDT
Extended Forecast for

San Marcos TX

  • This
    Afternoon

    Chance Thunderstorms Chance for Measurable Precipitation 40%

    Chance
    Thunderstorms

    High: 91 °F

  • Tonight

    Partly Cloudy

    Partly
    Cloudy

    Low: 72 °F

  • Wednesday

    Slight Chance Thunderstorms Chance for Measurable Precipitation 20%

    Slight Chc
    Thunderstorms

    High: 91 °F

  • Wednesday
    Night

    Partly Cloudy

    Partly
    Cloudy

    Low: 73 °F

  • Thursday

    Mostly Sunny

    Mostly
    Sunny

    High: 92 °F

  • Thursday
    Night

    Partly Cloudy

    Partly
    Cloudy

    Low: 74 °F

  • Friday

    Partly Sunny

    Partly
    Sunny

    High: 91 °F

  • Friday
    Night

    Mostly Cloudy

    Mostly
    Cloudy

    Low: 73 °F

  • Independence
    Day

    Chance Thunderstorms Chance for Measurable Precipitation 30%

    Chance
    Thunderstorms

    High: 91 °F

Detailed Forecast

This Afternoon
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 91. Heat index values as high as 98. South wind around 10 mph.
Tonight
Partly cloudy, with a low around 72. South southwest wind 5 to 10 mph.
Wednesday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 91. Heat index values as high as 98. South wind 5 to 15 mph, with gusts as high as 20 mph.
Wednesday Night
Partly cloudy, with a low around 73. South wind 10 to 15 mph.
Thursday
Mostly sunny, with a high near 92. South wind 5 to 15 mph, with gusts as high as 20 mph.
Thursday Night
Partly cloudy, with a low around 74. South wind 5 to 15 mph, with gusts as high as 20 mph.
Friday
Partly sunny, with a high near 91. South wind 5 to 15 mph.
Friday Night
Mostly cloudy, with a low around 73. South southeast wind 5 to 10 mph.
Independence Day
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 91. South southeast wind 5 to 15 mph.
Saturday Night
Mostly cloudy, with a low around 74.
Sunday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 90.
Sunday Night
Mostly cloudy, with a low around 73.
Monday
Partly sunny, with a high near 92.
  Click Map For Forecast
Point Forecast:
San Marcos TX
 29.88°N 97.94°W (Elev. 577 ft)
10:39 am CDT Jun 30, 2015
1pm CDT Jun 30, 2015-6pm CDT Jul 6, 2015
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Graph

National Digital Forecast Database