Heavy Rainfall and Flooding in the Mid-Atlantic; Heat and Wildfire Concerns in the West

Slow moving showers and thunderstorms may result in flash flooding for portions of the mid-Atlantic region through tonight. Meanwhile, excessive heat will continue to build across the West through Tuesday. Heat Advisories and Extreme Heat Warnings are in effect. Fire Weather concerns continue for the West with dry and breezy conditions. Watching the tropics across the Southeast. Read More >

Hazardous Weather Conditions

Flood Watch until July 15, 01:00 PM CDT

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Partly Cloudy

78°F

26°C

Humidity	100%
Wind Speed	SE 7 mph
Barometer	30.04 in (1016.4 mb)
Dewpoint	78°F (26°C)
Visibility	10.00 mi
Heat Index	81°F (27°C)
Last update	15 Jul 4:56 am CDT

More Information:

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

Extended Forecast for

5 Miles SW San Marcos TX

Flood Watch July 15, 05:15am until July 15, 01:00pm

Click here for hazard details and duration

Flood Watch

Flood Watch July 15, 05:15am until July 15, 01:00pm
NOW until 1:00pm Tue
Flood Watch
Overnight
Low: 74 °F
Slight Chance
Showers
Tuesday
High: 93 °F
Slight Chance
Showers then
Mostly Sunny
Tuesday Night
Low: 74 °F
Increasing
Clouds
Wednesday
High: 95 °F
Gradual
Clearing
Wednesday Night
Low: 72 °F
Partly Cloudy
Thursday
High: 94 °F
Mostly Sunny
Thursday Night
Low: 73 °F
Partly Cloudy
Friday
High: 92 °F
Mostly Sunny

Detailed Forecast

Overnight

A 20 percent chance of showers. Mostly cloudy, with a low around 74. South wind around 5 mph.

Tuesday

A 10 percent chance of showers before 7am. Mostly cloudy, then gradually becoming sunny, with a high near 93. Heat index values as high as 102. South wind 5 to 10 mph, with gusts as high as 20 mph.

Tuesday Night

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

Wednesday

Cloudy through mid morning, then gradual clearing, with a high near 95. Heat index values as high as 103. South wind 5 to 10 mph, with gusts as high as 20 mph.

Wednesday Night

Partly cloudy, with a low around 72. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.

Thursday

Mostly sunny, with a high near 94. South wind 5 to 10 mph.

Thursday Night

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

Friday

Mostly sunny, with a high near 92. Calm wind becoming south around 5 mph in the morning.

Friday Night

Partly cloudy, with a low around 74. Southeast wind around 5 mph.

Saturday

Mostly sunny, with a high near 95.