Severe Thunderstorms and Excessive Rainfall in the Central U.S.; Heat Building in the Western U.S.

A cold front pressing east across the central U.S. will be the focus for areas of strong to severe thunderstorms and excessive rainfall through this weekend. Strong to severe thunderstorms my bring damaging winds, hail, and a few tornadoes while excessive rainfall may lead to areas of flooding. Heat will build across the western U.S. with heat-related watches, warnings, and advisories issued. Read More >

Hazardous Weather Conditions

Flood Watch until July 13, 07:00 PM CDT

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Fair

80°F

27°C

Humidity	90%
Wind Speed	S 6 mph
Barometer	30.03 in (1015.8 mb)
Dewpoint	77°F (25°C)
Visibility	10.00 mi
Heat Index	86°F (30°C)
Last update	12 Jul 11:56 pm CDT

More Information:

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

Extended Forecast for

San Marcos TX

Flood Watch July 13, 12:28am until July 13, 07:00pm

Click here for hazard details and duration

Flood Watch

Flood Watch July 13, 12:28am until July 13, 07:00pm
NOW until 7:00pm Sun
Flood Watch
Overnight
Low: 76 °F
Mostly Cloudy
Sunday
High: 92 °F
Heavy Rain
Sunday Night
Low: 74 °F
Heavy Rain
Monday
High: 93 °F
Mostly Sunny
Monday Night
Low: 75 °F
Partly Cloudy
Tuesday
High: 94 °F
Partly Sunny
Tuesday Night
Low: 74 °F
Partly Cloudy
Wednesday
High: 95 °F
Mostly Sunny

Detailed Forecast

Overnight

Mostly cloudy, with a low around 76. South wind 5 to 10 mph.

Sunday

A 40 percent chance of showers and thunderstorms, mainly after 1pm. Some of the storms could produce heavy rainfall. Partly sunny, with a high near 92. Heat index values as high as 101. South wind 5 to 10 mph, with gusts as high as 20 mph.

Sunday Night

A 20 percent chance of showers and thunderstorms before 1am. Some of the storms could produce heavy rainfall. Mostly cloudy, with a low around 74. South southeast wind 5 to 10 mph.

Monday

Mostly sunny, with a high near 93. Heat index values as high as 100. Calm wind becoming south around 5 mph in the morning.

Monday Night

Partly cloudy, with a low around 75. Southeast wind 5 to 10 mph.

Tuesday

Partly sunny, with a high near 94. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.

Tuesday Night

Partly cloudy, with a low around 74. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.

Wednesday

Mostly sunny, with a high near 95. South wind 5 to 10 mph, with gusts as high as 20 mph.

Wednesday Night

Partly cloudy, with a low around 73. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.