A Large and Slow-Moving Storm System with Thunderstorms and Heavy Rain

A large storm system will slowly track from the south-central U.S. into the East the rest of the week with strong to severe thunderstorms and heavy rain with flooding. Today's threat for severe storms is across Texas toward the Arklatex and heavy rain with flooding from the south-central Plains into the Lower Mississippi Valley. Also, critical fire weather threats are present again in New Mexico. Read More >

Hazardous Weather Conditions

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Fair

84°F

29°C

Humidity 51%
Wind Speed SE 16 mph
Barometer 29.63 in (1002.5 mb)
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Heat Index85°F (29°C)
Last update 24 May 6:56 pm CDT
Extended Forecast for

San Marcos TX

  • Tonight

    Tonight: Showers and thunderstorms, mainly after 10pm. Some of the storms could be severe and produce heavy rainfall.  Low around 64. South southeast wind 10 to 15 mph becoming north after midnight. Winds could gust as high as 25 mph.  Chance of precipitation is 90%. New rainfall amounts between 1 and 2 inches possible.

    Severe
    Thunderstorms

    Low: 64 °F

  • Wednesday

    Wednesday: A 20 percent chance of showers and thunderstorms before 1pm.  Cloudy through mid morning, then gradual clearing, with a high near 79. North northwest wind 10 to 15 mph, with gusts as high as 20 mph.

    Slight Chance
    T-storms

    High: 79 °F

  • Wednesday
    Night

    Wednesday Night: Mostly clear, with a low around 58. West northwest wind 5 to 10 mph.

    Mostly Clear

    Low: 58 °F

  • Thursday

    Thursday: Sunny, with a high near 87. West southwest wind 5 to 10 mph.

    Sunny

    High: 87 °F

  • Thursday
    Night

    Thursday Night: Mostly clear, with a low around 64. South wind around 5 mph.

    Mostly Clear

    Low: 64 °F

  • Friday

    Friday: Sunny, with a high near 89. South wind 5 to 10 mph.

    Sunny

    High: 89 °F

  • Friday
    Night

    Friday Night: Mostly clear, with a low around 67. South southeast wind 5 to 10 mph.

    Mostly Clear

    Low: 67 °F

  • Saturday

    Saturday: Sunny, with a high near 93. South wind 5 to 15 mph, with gusts as high as 25 mph.

    Sunny

    High: 93 °F

  • Saturday
    Night

    Saturday Night: Partly cloudy, with a low around 70. South wind 10 to 15 mph, with gusts as high as 25 mph.

    Partly Cloudy

    Low: 70 °F

Detailed Forecast

Tonight
Showers and thunderstorms, mainly after 10pm. Some of the storms could be severe and produce heavy rainfall. Low around 64. South southeast wind 10 to 15 mph becoming north after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between 1 and 2 inches possible.
Wednesday
A 20 percent chance of showers and thunderstorms before 1pm. Cloudy through mid morning, then gradual clearing, with a high near 79. North northwest wind 10 to 15 mph, with gusts as high as 20 mph.
Wednesday Night
Mostly clear, with a low around 58. West northwest wind 5 to 10 mph.
Thursday
Sunny, with a high near 87. West southwest wind 5 to 10 mph.
Thursday Night
Mostly clear, with a low around 64. South wind around 5 mph.
Friday
Sunny, with a high near 89. South wind 5 to 10 mph.
Friday Night
Mostly clear, with a low around 67. South southeast wind 5 to 10 mph.
Saturday
Sunny, with a high near 93. South wind 5 to 15 mph, with gusts as high as 25 mph.
Saturday Night
Partly cloudy, with a low around 70. South wind 10 to 15 mph, with gusts as high as 25 mph.
Sunday
Sunny, with a high near 94.
Sunday Night
Partly cloudy, with a low around 74.
Memorial Day
Mostly sunny, with a high near 93.
Monday Night
Partly cloudy, with a low around 73.
Tuesday
Partly sunny, with a high near 92.
Click Map For Forecast
Point Forecast:
San Marcos TX
 29.9°N 97.91°W (Elev. 640 ft)
6:38 pm CDT May 24, 2022
7pm CDT May 24, 2022-6pm CDT May 31, 2022
 
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Additional Resources

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Hourly Weather Forecast

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