National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Overcast

69°F

21°C

Humidity 81%
Wind Speed NE 10 mph
Barometer 29.93 in (1012.7 mb)
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Last update 30 Apr 10:56 am CDT
Extended Forecast for

2 Miles SSE Mountain City TX

Flood Watch April 30, 09:00pm until May 1, 09:00pm
Click here for hazard details and duration
Flood Watch

  • Today

    Today: A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 78. Northeast wind around 10 mph.

    High: 78 °F

    Chance
    T-storms

  • Tonight

    Tonight: A slight chance of showers and thunderstorms, then showers and possibly a thunderstorm after 10pm. Low around 60. Northeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 60 °F

    Showers
    Likely then
    Showers

  • Friday

    Friday: Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. High near 64. Northeast wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.

    High: 64 °F

    Heavy Rain

  • Friday Night

    Friday Night: A 30 percent chance of showers before 1am. Mostly cloudy, with a low around 51. North wind 15 to 20 mph, with gusts as high as 30 mph.

    Low: 51 °F

    Chance
    Showers

  • Saturday

    Saturday: Sunny, with a high near 71. North wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 71 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 49. Northeast wind 5 to 10 mph becoming light north northeast in the evening.

    Low: 49 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 75. Calm wind becoming south southeast around 5 mph in the afternoon.

    High: 75 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 55. South southeast wind around 5 mph.

    Low: 55 °F

    Mostly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 82. South wind 5 to 15 mph, with gusts as high as 25 mph.

    High: 82 °F

    Partly Sunny

Detailed Forecast

Today
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 78. Northeast wind around 10 mph.
Tonight
A slight chance of showers and thunderstorms, then showers and possibly a thunderstorm after 10pm. Low around 60. Northeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Friday
Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. High near 64. Northeast wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.
Friday Night
A 30 percent chance of showers before 1am. Mostly cloudy, with a low around 51. North wind 15 to 20 mph, with gusts as high as 30 mph.
Saturday
Sunny, with a high near 71. North wind 10 to 15 mph, with gusts as high as 25 mph.
Saturday Night
Mostly clear, with a low around 49. Northeast wind 5 to 10 mph becoming light north northeast in the evening.
Sunday
Mostly sunny, with a high near 75. Calm wind becoming south southeast around 5 mph in the afternoon.
Sunday Night
Mostly cloudy, with a low around 55. South southeast wind around 5 mph.
Monday
Partly sunny, with a high near 82. South wind 5 to 15 mph, with gusts as high as 25 mph.
Monday Night
Mostly cloudy, with a low around 64.
Tuesday
Mostly cloudy, with a high near 88.
Tuesday Night
Mostly cloudy, with a low around 70.
Wednesday
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 89.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SSE Mountain City TX
 30.02°N 97.89°W (Elev. 797 ft)
Last Update:
11:20 am CDT Apr 30, 2026
Forecast Valid:
11am CDT Apr 30, 2026-6pm CDT May 6, 2026
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation