Notice of NWS' New Version of Forecast
A new version of Forecast is coming soon!
Click here to visit the new site for details.

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° N Lon: 97.86° W Elev: 597 ft.

Fog/Mist

NA

Humidity NA
Wind Speed S 18 mph
Barometer 29.90 in
Dewpoint NA
Visibility 4.00 mi
Last update 27 May 11:46 am CDT
Detailed forecast for

Caldwell County

Today
Mostly cloudy until afternoon then becoming partly cloudy. Patchy drizzle early in the morning. Highs in the mid 90s. South winds 10 to 15 mph. Highest heat index readings around 107 in the afternoon.
Tonight
Partly cloudy before midnight then becoming mostly cloudy. Lows in the mid 70s. South winds 10 to 15 mph.
Sunday
Mostly cloudy. Slight chance of showers and thunderstorms in the morning, then a chance of showers and thunderstorms in the afternoon. Some thunderstorms may be severe in the afternoon. Locally heavy rainfall possible in the afternoon. Highs in the lower 90s. South winds 5 to 10 mph shifting to the southeast in the afternoon. Chance of rain 30 percent.
Sunday Night
Cloudy with showers and thunderstorms likely. Lows around 70. Northeast winds 5 to 10 mph. Chance of rain 60 percent.
Memorial Day
Not as warm. Cloudy with a 50 percent chance of showers and thunderstorms. Highs in the lower 80s. East winds 5 to 10 mph.
Monday Night
Cloudy with a 30 percent chance of showers and thunderstorms. Lows in the upper 60s.
Tuesday
Mostly cloudy with a 50 percent chance of showers and thunderstorms. Highs in the mid 80s.
Tuesday Night
Mostly cloudy with a 30 percent chance of showers and thunderstorms. Lows in the upper 60s.
Wednesday
Cloudy with a 40 percent chance of showers and thunderstorms. Highs in the mid 80s.
Wednesday Night
Cloudy with a 30 percent chance of showers and thunderstorms. Lows in the upper 60s.
Thursday And Thursday Night
Mostly cloudy with a 40 percent chance of showers and thunderstorms. Highs in the mid 80s. Lows in the upper 60s.
Friday
Mostly cloudy with a 30 percent chance of showers and thunderstorms. Highs in the mid 80s.



Click Map For Forecast
259 AM CDT Sat May 27 2017
 
 

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database