Severe Thunderstorms in the Southern Plains; Heavy to Excessive Rainfall in South Central Texas

Widespread rain may produce flash flooding across the Southern Plains into the Ozarks today. Numerous instances of flash flooding are expected in south-central Texas, including the Hill Country. There will also be a risk of isolated severe thunderstorms across the southern Plains today, where an instance or two of severe wind, hail, or a brief tornado may occur. Read More >

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Mostly Cloudy

81°F

27°C

Humidity	62%
Wind Speed	S 14 mph
Barometer	29.97 in (1014.2 mb)
Dewpoint	67°F (19°C)
Visibility	10.00 mi
Heat Index	83°F (28°C)
Last update	20 Nov 11:56 am CST

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

San Marcos TX

This Afternoon
High: 81 °F
Chance
T-storms
Tonight
Low: 67 °F
Showers
Likely then
Chance
T-storms
Friday
High: 80 °F
Chance
Showers
Friday Night
Low: 63 °F
Slight Chance
Showers then
Chance
T-storms
Saturday
High: 76 °F
Chance
Showers
Saturday Night
Low: 61 °F
Slight Chance
Showers
Sunday
High: 77 °F
Chance
Showers
Sunday Night
Low: 65 °F
Chance
Showers then
Chance
T-storms
Monday
High: 77 °F
Showers
Likely

Detailed Forecast

This Afternoon

A chance of showers, with thunderstorms also possible after 3pm. Mostly cloudy, with a high near 81. South wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 50%. New rainfall amounts between a quarter and half of an inch possible.

Tonight

Showers likely and possibly a thunderstorm before 9pm, then a chance of showers and thunderstorms after 9pm. Mostly cloudy, with a low around 67. South wind 5 to 10 mph becoming east in the evening. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

Friday

A chance of showers and thunderstorms before noon, then a slight chance of showers between noon and 3pm. Cloudy, then gradually becoming mostly sunny, with a high near 80. Southwest wind around 5 mph becoming north in the afternoon. Chance of precipitation is 40%.

Friday Night

A slight chance of showers, then a chance of showers and thunderstorms after midnight. Partly cloudy, with a low around 63. Calm wind becoming north around 5 mph after midnight. Chance of precipitation is 30%.

Saturday

A chance of showers and thunderstorms. Partly sunny, with a high near 76. Northeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.

Saturday Night

A 20 percent chance of showers. Mostly cloudy, with a low around 61. Northeast wind around 5 mph.

Sunday

A chance of showers, with thunderstorms also possible after noon. Mostly cloudy, with a high near 77. East northeast wind 5 to 10 mph becoming south southeast in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 40%.

Sunday Night

A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 65. South wind around 10 mph, with gusts as high as 20 mph.

Monday

Showers likely and possibly a thunderstorm before noon, then a chance of showers and thunderstorms after noon. Partly sunny, with a high near 77. South wind 5 to 10 mph becoming west northwest in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 70%.

Monday Night

Mostly clear, with a low around 52.

Tuesday

Sunny, with a high near 77.

Tuesday Night

Partly cloudy, with a low around 51.

Wednesday

Mostly sunny, with a high near 66.