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

Flood Watch until June 16, 07:00 PM CDT

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Overcast

79°F

26°C

Humidity	97%
Wind Speed	S 12 mph
Barometer	29.99 in (1014.7 mb)
Dewpoint	78°F (26°C)
Visibility	8.00 mi
Heat Index	84°F (29°C)
Last update	15 Jun 12:56 am CDT

More Information:

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

Extended Forecast for

3 Miles WNW San Marcos TX

Flood Watch June 15, 01:54am until June 16, 07:00pm

Click here for hazard details and duration

Flood Watch

Flood Watch June 15, 01:54am until June 16, 07:00pm
NOW until 7:00pm Tue
Flood Watch
Overnight
Low: 75 °F
Showers
Likely
Monday
High: 82 °F
Showers then
T-storms
Monday Night
Low: 73 °F
T-storms
Likely then
Showers
Likely
Tuesday
High: 84 °F
Showers
Likely then
Chance
T-storms
Tuesday Night
Low: 73 °F
Mostly Cloudy
Wednesday
High: 89 °F
Mostly Sunny
Wednesday Night
Low: 76 °F
Partly Cloudy
Thursday
High: 95 °F
Mostly Sunny

Detailed Forecast

Overnight

Showers likely and possibly a thunderstorm. Cloudy, with a low around 75. Calm wind. Chance of precipitation is 70%. New rainfall amounts between 1 and 2 inches possible.

Monday

Showers and possibly a thunderstorm, mainly before 4pm, then showers and thunderstorms likely after 4pm. High near 82. Calm wind becoming east southeast around 5 mph in the afternoon. Chance of precipitation is 90%. New rainfall amounts between 1 and 2 inches possible.

Monday Night

Showers and thunderstorms likely before 1am, then showers likely and possibly a thunderstorm between 1am and 4am, then a chance of showers and thunderstorms after 4am. Mostly cloudy, with a low around 73. East wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Tuesday

A chance of showers and thunderstorms before 7am, then showers likely and possibly a thunderstorm between 7am and 10am, then a chance of showers and thunderstorms after 10am. Partly sunny, with a high near 84. Calm wind becoming east southeast around 5 mph in the afternoon. Chance of precipitation is 60%.

Tuesday Night

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 89. 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.

Friday Night

A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 75.

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 75.

Sunday

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