Flash Flood Threats in the Southeast and Rockies; Excessive Heat in the Southwest

Flash and small stream flooding threats linger across the southern Rockies Wednesday. Strong thunderstorms with heavy downpours may cause local flash flooding along portions of the Southeast states into Thursday. Excessive heat will continue to impact the southern California mountains and deserts into Arizona and Nevada into Thursday. Read More >

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Fair

79°F

26°C

Humidity 90%
Wind Speed NE 10 mph
Barometer 30.03 in (1016.0 mb)
Dewpoint 76°F (24°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 4 Aug 8:56 am CDT
Extended Forecast for

San Marcos TX

  • Today

    Today: A 20 percent chance of showers and thunderstorms after 1pm.  Partly sunny, with a high near 91. East northeast wind around 10 mph.

    Partly Sunny
    then Slight
    Chance
    T-storms

    High: 91 °F

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms after 4am.  Partly cloudy, with a low around 73. East wind 5 to 10 mph.

    Partly Cloudy
    then Slight
    Chance
    T-storms

    Low: 73 °F

  • Thursday

    Thursday: A 50 percent chance of showers and thunderstorms, mainly after 7am.  Partly sunny, with a high near 89. Light and variable wind becoming east southeast 5 to 10 mph in the morning.  New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Chance
    T-storms

    High: 89 °F

  • Thursday
    Night

    Thursday Night: A 20 percent chance of showers and thunderstorms.  Partly cloudy, with a low around 72. East wind around 5 mph becoming south southwest after midnight.

    Slight Chance
    T-storms

    Low: 72 °F

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms, mainly after 1pm.  Mostly sunny, with a high near 93. South wind 5 to 10 mph.

    Chance
    T-storms

    High: 93 °F

  • Friday
    Night

    Friday Night: Mostly clear, with a low around 74. South southeast wind 5 to 10 mph.

    Mostly Clear

    Low: 74 °F

  • Saturday

    Saturday: Sunny, with a high near 94. South wind 5 to 15 mph, with gusts as high as 20 mph.

    Sunny

    High: 94 °F

  • Saturday
    Night

    Saturday Night: Mostly clear, with a low around 75. South wind around 10 mph, with gusts as high as 20 mph.

    Mostly Clear

    Low: 75 °F

  • Sunday

    Sunday: Mostly sunny, with a high near 96. South wind 5 to 15 mph, with gusts as high as 25 mph.

    Mostly Sunny

    High: 96 °F

Detailed Forecast

Today
A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 91. East northeast wind around 10 mph.
Tonight
A 20 percent chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 73. East wind 5 to 10 mph.
Thursday
A 50 percent chance of showers and thunderstorms, mainly after 7am. Partly sunny, with a high near 89. Light and variable wind becoming east southeast 5 to 10 mph in the morning. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 72. East wind around 5 mph becoming south southwest after midnight.
Friday
A 30 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 93. South wind 5 to 10 mph.
Friday Night
Mostly clear, with a low around 74. South southeast wind 5 to 10 mph.
Saturday
Sunny, with a high near 94. South wind 5 to 15 mph, with gusts as high as 20 mph.
Saturday Night
Mostly clear, with a low around 75. South wind around 10 mph, with gusts as high as 20 mph.
Sunday
Mostly sunny, with a high near 96. South wind 5 to 15 mph, with gusts as high as 25 mph.
Sunday Night
Mostly clear, with a low around 76.
Monday
Mostly sunny, with a high near 96.
Monday Night
Partly cloudy, with a low around 76.
Tuesday
Mostly sunny, with a high near 95.
Click Map For Forecast
Point Forecast:
San Marcos TX
 29.88°N 97.94°W (Elev. 577 ft)
6:04 am CDT Aug 4, 2021
9am CDT Aug 4, 2021-6pm CDT Aug 10, 2021
 
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