Heavy Rainfall and Flash Flood Threats From the Lower Mississippi Valley Into the Mid-Atlantic; Elevated to Critical Fire Concerns Out West

Heavy rainfall will continue through midweek from the lower Mississippi Valley to the Mid-Atlantic. Elevated to critical fire weather threat continues across the Central Great Basin and the Central Rockies; and there is an elevated fire risk from southwestern Oregon to northern California. Record river flooding will continue in portions of the Midwest and the Carolinas. Read More >

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Mostly Cloudy

80°F

27°C

Humidity 74%
Wind Speed S 5 mph
Barometer 29.97 in (1014.0 mb)
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 24 Sep 11:56 am CDT
Extended Forecast for

San Marcos TX

  • This
    Afternoon

    This Afternoon: A 20 percent chance of showers.  Partly sunny, with a high near 87. South southwest wind around 5 mph.

    Slight Chance
    Showers

    High: 87 °F

  • Tonight

    Tonight: Partly cloudy, with a low around 71. South southeast wind around 5 mph.

    Partly Cloudy

    Low: 71 °F

  • Tuesday

    Tuesday: Mostly sunny, with a high near 91. South wind 5 to 10 mph.

    Mostly Sunny

    High: 91 °F

  • Tuesday
    Night

    Tuesday Night: A 20 percent chance of showers and thunderstorms.  Partly cloudy, with a low around 72. South southeast wind 5 to 10 mph.

    Slight Chance
    T-storms

    Low: 72 °F

  • Wednesday

    Wednesday: Showers and thunderstorms likely.  Mostly cloudy, with a high near 85. Southeast wind around 5 mph becoming east northeast in the afternoon.  Chance of precipitation is 60%.

    T-storms
    Likely

    High: 85 °F

  • Wednesday
    Night

    Wednesday Night: Showers and thunderstorms likely.  Mostly cloudy, with a low around 68. North wind 5 to 10 mph.  Chance of precipitation is 60%.

    T-storms
    Likely

    Low: 68 °F

  • Thursday

    Thursday: A 50 percent chance of showers and thunderstorms.  Mostly cloudy, with a high near 81. North wind 5 to 10 mph.

    Chance
    T-storms

    High: 81 °F

  • Thursday
    Night

    Thursday Night: A 20 percent chance of showers and thunderstorms.  Mostly cloudy, with a low around 70. East wind around 5 mph.

    Slight Chance
    T-storms

    Low: 70 °F

  • Friday

    Friday: A 50 percent chance of showers and thunderstorms.  Mostly cloudy, with a high near 84. Southeast wind 5 to 10 mph.

    Chance
    T-storms

    High: 84 °F

Detailed Forecast

This Afternoon
A 20 percent chance of showers. Partly sunny, with a high near 87. South southwest wind around 5 mph.
Tonight
Partly cloudy, with a low around 71. South southeast wind around 5 mph.
Tuesday
Mostly sunny, with a high near 91. South wind 5 to 10 mph.
Tuesday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 72. South southeast wind 5 to 10 mph.
Wednesday
Showers and thunderstorms likely. Mostly cloudy, with a high near 85. Southeast wind around 5 mph becoming east northeast in the afternoon. Chance of precipitation is 60%.
Wednesday Night
Showers and thunderstorms likely. Mostly cloudy, with a low around 68. North wind 5 to 10 mph. Chance of precipitation is 60%.
Thursday
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 81. North wind 5 to 10 mph.
Thursday Night
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 70. East wind around 5 mph.
Friday
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 84. Southeast wind 5 to 10 mph.
Friday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 71.
Saturday
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 85.
Saturday Night
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 72.
Sunday
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 85.
Click Map For Forecast
Point Forecast:
San Marcos TX
 29.9°N 97.91°W (Elev. 640 ft)
5:43 am CDT Sep 24, 2018
12pm CDT Sep 24, 2018-6pm CDT Sep 30, 2018
 
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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