Flooding Concerns in Puerto Rico; Thunderstorms Across the Southeast U.S.

Showers and thunderstorms capable of producing widespread heavy rainfall will be possible across much of Puerto Rico today. Heavy rainfall will likely lead to flash, urban and small stream flooding. Some areas may face life-threatening flooding. In the Southeast U.S., strong to marginally severe thunderstorms will be possible this afternoon. Read More >

Hazardous Weather Conditions

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Mostly Cloudy

73°F

23°C

Humidity 71%
Wind Speed N 9 mph
Barometer 29.98 in (1014.6 mb)
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Last update 19 Apr 7:56 pm CDT
Extended Forecast for

5 Miles SW San Marcos TX

  • Tonight

    Tonight: Mostly cloudy, with a low around 64. North northeast wind 5 to 10 mph.

    Mostly Cloudy

    Low: 64 °F

  • Saturday

    Saturday: A slight chance of showers and thunderstorms before 1pm, then showers likely and possibly a thunderstorm between 1pm and 4pm, then showers and thunderstorms likely after 4pm.  Mostly cloudy, with a high near 74. Northeast wind 5 to 15 mph, with gusts as high as 20 mph.  Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Slight Chance
    T-storms then
    T-storms
    Likely

    High: 74 °F

  • Saturday
    Night

    Saturday Night: Showers and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am.  Low around 52. North wind around 15 mph, with gusts as high as 25 mph.  Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    T-storms then
    Showers

    Low: 52 °F

  • Sunday

    Sunday: Mostly cloudy, with a high near 65. North wind around 20 mph, with gusts as high as 35 mph.

    Mostly Cloudy

    High: 65 °F

  • Sunday
    Night

    Sunday Night: Mostly cloudy, with a low around 48. North northeast wind 10 to 15 mph decreasing to 5 to 10 mph after midnight. Winds could gust as high as 25 mph.

    Mostly Cloudy

    Low: 48 °F

  • Monday

    Monday: Partly sunny, with a high near 71. North northeast wind 5 to 10 mph becoming east southeast in the afternoon.

    Partly Sunny

    High: 71 °F

  • Monday
    Night

    Monday Night: Partly cloudy, with a low around 53. Southeast wind around 10 mph.

    Partly Cloudy

    Low: 53 °F

  • Tuesday

    Tuesday: Partly sunny, with a high near 78. South wind 5 to 15 mph, with gusts as high as 25 mph.

    Partly Sunny

    High: 78 °F

  • Tuesday
    Night

    Tuesday Night: Mostly cloudy, with a low around 62. South southeast wind 10 to 15 mph, with gusts as high as 20 mph.

    Mostly Cloudy

    Low: 62 °F

Detailed Forecast

Tonight
Mostly cloudy, with a low around 64. North northeast wind 5 to 10 mph.
Saturday
A slight chance of showers and thunderstorms before 1pm, then showers likely and possibly a thunderstorm between 1pm and 4pm, then showers and thunderstorms likely after 4pm. Mostly cloudy, with a high near 74. Northeast wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday Night
Showers and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Low around 52. North wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Sunday
Mostly cloudy, with a high near 65. North wind around 20 mph, with gusts as high as 35 mph.
Sunday Night
Mostly cloudy, with a low around 48. North northeast wind 10 to 15 mph decreasing to 5 to 10 mph after midnight. Winds could gust as high as 25 mph.
Monday
Partly sunny, with a high near 71. North northeast wind 5 to 10 mph becoming east southeast in the afternoon.
Monday Night
Partly cloudy, with a low around 53. Southeast wind around 10 mph.
Tuesday
Partly sunny, with a high near 78. South wind 5 to 15 mph, with gusts as high as 25 mph.
Tuesday Night
Mostly cloudy, with a low around 62. South southeast wind 10 to 15 mph, with gusts as high as 20 mph.
Wednesday
Mostly cloudy, with a high near 82.
Wednesday Night
Mostly cloudy, with a low around 66.
Thursday
Mostly cloudy, with a high near 83.
Thursday Night
Mostly cloudy, with a low around 68.
Friday
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 86.
Click Map For Forecast
Point Forecast:
5 Miles SW San Marcos TX
 29.83°N 97.99°W (Elev. 676 ft)
6:42 pm CDT Apr 19, 2024
8pm CDT Apr 19, 2024-6pm CDT Apr 26, 2024
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database