Areas of Severe Thunderstorms and Excessive Rainfall Today

Scattered severe thunderstorms capable of damaging wind gusts and some hail are expected this afternoon and evening from the Upper Ohio River Valley into the Northeast, and from the Appalachians into the Mid-Atlantic States. Excessive rainfall from heavy thunderstorms may produce areas of flash flooding from southern New Mexico into the western and northern Gulf Coast into Wednesday. Read More >

Hazardous Weather Conditions

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Light Rain

71°F

22°C

Humidity	96%
Wind Speed	NW 3 mph
Barometer	29.98 in (1014.3 mb)
Dewpoint	70°F (21°C)
Visibility	10.00 mi
Last update	15 Jun 6:56 am CDT

More Information:

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

Extended Forecast for

2 Miles W San Marcos TX

Flood Watch June 15, 07:19am until June 16, 07:00pm

Flash Flood Warning June 15, 07:19am until June 15, 09:15am

Click here for hazard details and duration

Flood Watch

...

Flood Watch June 15, 07:19am until June 16, 07:00pm
Flash Flood Warning June 15, 07:19am until June 15, 09:15am
NOW: Multiple hazards in effect
Click HERE for Details
Today
High: 82 °F
Heavy Rain
Tonight
Low: 73 °F
Chance
T-storms
Tuesday
High: 84 °F
Chance
T-storms
Tuesday Night
Low: 73 °F
Slight Chance
T-storms then
Mostly Cloudy
Wednesday
High: 90 °F
Mostly Sunny
Wednesday Night
Low: 76 °F
Partly Cloudy
Thursday
High: 95 °F
Mostly Sunny
Thursday Night
Low: 78 °F
Mostly Clear
then Chance
Showers

Detailed Forecast

Today

Showers and possibly a thunderstorm, mainly before 1pm, then a chance of showers and thunderstorms after 1pm. Some of the storms could produce heavy rainfall. High near 82. Calm wind becoming east southeast around 5 mph in the afternoon. Chance of precipitation is 80%. New rainfall amounts between 1 and 2 inches possible.

Tonight

A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 73. East wind around 5 mph becoming calm in the evening.

Tuesday

A 50 percent chance of showers and thunderstorms, mainly before 4pm. Partly sunny, with a high near 84. Calm wind becoming east southeast around 5 mph in the afternoon. New rainfall amounts between a quarter and half of an inch possible.

Tuesday Night

A 10 percent chance of showers and thunderstorms before 7pm. Mostly cloudy, with a low around 73. East southeast wind around 5 mph becoming calm in the evening.

Wednesday

Mostly sunny, with a high near 90. East southeast wind 5 to 10 mph, with gusts as high as 20 mph.

Wednesday Night

Partly cloudy, with a low around 76. South wind 5 to 10 mph, with gusts as high as 20 mph.

Thursday

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

Thursday Night

A 30 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 78. Southeast wind 5 to 10 mph, with gusts as high as 20 mph.

Juneteenth

A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 91. East southeast wind 5 to 10 mph.

Friday Night

A chance of showers and thunderstorms. Mostly cloudy, with a low around 75. Chance of precipitation is 50%.

Saturday

Showers and thunderstorms likely. Mostly cloudy, with a high near 89. Chance of precipitation is 60%.

Saturday Night

A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 76.

Sunday

A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 90.