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Severe Weather and Flooding From Portions of the Plains to the Mid-Atlantic

A potent spring storm system with abundant moisture will bring a chance of significant severe weather and heavy rain today into tonight. Damaging winds, large hail, and a couple of tornadoes will be possible across the Tennessee Valley, middle Ohio Valley, and portions of the Mid-Atlantic. Heavy rain and flooding are possible from the Ozarks to the Tennessee Valley. Read More >

Hazardous Weather Conditions

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Fog/Mist

N/A

Humidity NA
Wind Speed S 12 mph
Barometer NA
Dewpoint N/A
Visibility 5.00 mi
Last update 27 May 2:47 pm CDT
Extended Forecast for

San Marcos TX

  • This
    Afternoon

    This Afternoon: Partly sunny, with a high near 95. Heat index values as high as 106. South wind around 10 mph.

    Partly Sunny

    High: 95 °F

  • Tonight

    Tonight: Mostly cloudy, with a low around 76. South southeast wind 5 to 10 mph.

    Mostly Cloudy

    Low: 76 °F

  • Sunday

    Sunday: A 30 percent chance of showers and thunderstorms after 1pm. Some of the storms could be severe and produce heavy rainfall.  Mostly cloudy, with a high near 91. Heat index values as high as 99. South wind 5 to 10 mph.

    Partly Sunny
    then Severe
    Thunderstorms

    High: 91 °F

  • Sunday
    Night

    Sunday Night: Showers and thunderstorms likely, mainly after 7pm. Some of the storms could be severe and produce heavy rainfall.  Cloudy, with a low around 69. Northeast wind 5 to 10 mph.  Chance of precipitation is 60%.

    Severe
    Thunderstorms

    Low: 69 °F

  • Memorial
    Day

    Memorial Day: A 50 percent chance of showers and thunderstorms.  Cloudy, with a high near 82. North northeast wind 5 to 10 mph becoming east in the afternoon.

    Chance
    T-storms

    High: 82 °F

  • Monday
    Night

    Monday Night: A 30 percent chance of showers and thunderstorms.  Mostly cloudy, with a low around 66. East southeast wind 5 to 10 mph becoming light  after midnight.

    Chance
    T-storms

    Low: 66 °F

  • Tuesday

    Tuesday: A 50 percent chance of showers and thunderstorms.  Mostly cloudy, with a high near 86. Light east wind becoming east southeast 5 to 10 mph in the morning.

    Chance
    T-storms

    High: 86 °F

  • Tuesday
    Night

    Tuesday Night: A 30 percent chance of showers and thunderstorms.  Mostly cloudy, with a low around 67. East southeast wind 5 to 10 mph becoming light south southeast  after midnight.

    Chance
    T-storms

    Low: 67 °F

  • Wednesday

    Wednesday: A 50 percent chance of showers and thunderstorms.  Mostly cloudy, with a high near 85. East wind 5 to 10 mph.

    Chance
    T-storms

    High: 85 °F

Detailed Forecast

This Afternoon
Partly sunny, with a high near 95. Heat index values as high as 106. South wind around 10 mph.
Tonight
Mostly cloudy, with a low around 76. South southeast wind 5 to 10 mph.
Sunday
A 30 percent chance of showers and thunderstorms after 1pm. Some of the storms could be severe and produce heavy rainfall. Mostly cloudy, with a high near 91. Heat index values as high as 99. South wind 5 to 10 mph.
Sunday Night
Showers and thunderstorms likely, mainly after 7pm. Some of the storms could be severe and produce heavy rainfall. Cloudy, with a low around 69. Northeast wind 5 to 10 mph. Chance of precipitation is 60%.
Memorial Day
A 50 percent chance of showers and thunderstorms. Cloudy, with a high near 82. North northeast wind 5 to 10 mph becoming east in the afternoon.
Monday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 66. East southeast wind 5 to 10 mph becoming light after midnight.
Tuesday
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 86. Light east wind becoming east southeast 5 to 10 mph in the morning.
Tuesday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 67. East southeast wind 5 to 10 mph becoming light south southeast after midnight.
Wednesday
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 85. East wind 5 to 10 mph.
Wednesday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 68.
Thursday
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 84.
Thursday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 69.
Friday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 86.
Click Map For Forecast
Point Forecast:
San Marcos TX
 29.88°N 97.94°W (Elev. 577 ft)
2:24 pm CDT May 27, 2017
3pm CDT May 27, 2017-6pm CDT Jun 2, 2017
 
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