Unsettled Weather in the Eastern U.S. through Memorial Day

Showers and thunderstorms are expected from Texas to the Northeast through Tuesday. Heavy rain will create mainly localized areas of flash flooding across the central Gulf Coast into the Appalachians. Elevated to Critical fire weather conditions due to gusty winds and low humidity are expected through Tuesday across Oregon and Nevada. Showers and thunderstorms will develop over the Northwest. Read More >

Hazardous Weather Conditions

Flood Watch in effect from May 26, 04:00 PM CDT until May 27, 08:00 AM CDT

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	69%
Wind Speed	S 8 mph
Barometer	29.90 in (1011.8 mb)
Dewpoint	70°F (21°C)
Visibility	5.00 mi
Heat Index	84°F (29°C)
Last update	26 May 11:56 am CDT

More Information:

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

Extended Forecast for

San Marcos TX

Flood Watch May 26, 04:00pm until May 27, 08:00am

Click here for hazard details and duration

Flood Watch

This Afternoon
High: 86 °F
Slight Chance
T-storms
Tonight
Low: 70 °F
Showers
Wednesday
High: 82 °F
Showers
Likely
Wednesday Night
Low: 70 °F
Chance
T-storms then
Chance
Showers
Thursday
High: 87 °F
Mostly Sunny
Thursday Night
Low: 72 °F
Partly Cloudy
Friday
High: 89 °F
Mostly Sunny
Friday Night
Low: 73 °F
Partly Cloudy
Saturday
High: 89 °F
Partly Sunny

Detailed Forecast

This Afternoon

A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 86. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.

Tonight

Showers and possibly a thunderstorm. Low around 70. South wind 5 to 10 mph becoming west northwest after midnight. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.

Wednesday

Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 82. East southeast wind around 5 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

Wednesday Night

A 30 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 70. East southeast wind around 5 mph becoming calm in the evening.

Thursday

Mostly sunny, with a high near 87. Calm wind becoming east around 5 mph in the afternoon.

Thursday Night

Partly cloudy, with a low around 72. East southeast wind around 5 mph becoming calm in the evening.

Friday

Mostly sunny, with a high near 89. Calm wind becoming south southeast around 5 mph in the afternoon.

Friday Night

Partly cloudy, with a low around 73. South southeast wind around 5 mph.

Saturday

Partly sunny, with a high near 89. South southwest wind around 5 mph.

Saturday Night

A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 73.