Flooding Threat Along the Gulf Coast, Southern Rockies and High Plains; Cooler Weather in the Central and Eastern U.S.

Strong thunderstorms may bring excessive rainfall and flooding over parts of the northern Gulf Coast today and over parts of the southern Rockies into the High Plains today through the weekend. A refreshingly cool and dry air mass will continue to produce below average temperatures across the central and eastern U.S. through the weekend. Read More >

Hazardous Weather Conditions

Flood Watch in effect from August 31, 12:00 PM CDT until September 1, 12:00 PM CDT

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

A Few Clouds with Haze

93°F

34°C

Humidity	54%
Wind Speed	NE 15 G 25 mph
Barometer	29.98 in (1014.3 mb)
Dewpoint	74°F (23°C)
Visibility	4.00 mi
Heat Index	103°F (39°C)
Last update	31 Aug 2:56 pm CDT

More Information:

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

Extended Forecast for

San Marcos Municipal Airport TX

Flood Watch until September 1, 12:00pm

Click here for hazard details and duration

Flood Watch

Flood Watch until September 1, 12:00pm
NOW until 12:00pm Mon
Flood Watch
This Afternoon
High: 91 °F
Chance
T-storms
Tonight
Low: 72 °F
Chance
T-storms
Labor Day
High: 89 °F
Chance
Showers then
Chance
T-storms
Monday Night
Low: 71 °F
Partly Cloudy
Tuesday
High: 94 °F
Sunny
Tuesday Night
Low: 69 °F
Mostly Clear
Wednesday
High: 96 °F
Sunny
Wednesday Night
Low: 67 °F
Mostly Clear

Detailed Forecast

This Afternoon

A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 91. Northeast wind around 5 mph. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Tonight

A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 72. Northeast wind around 5 mph becoming calm in the evening. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Labor Day

A chance of showers, with thunderstorms also possible after 10am. Partly sunny, with a high near 89. Calm wind becoming north northeast around 5 mph in the morning. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Monday Night

Partly cloudy, with a low around 71. East northeast wind around 5 mph becoming calm in the evening.

Tuesday

Sunny, with a high near 94. Calm wind becoming north northeast around 5 mph in the morning.

Tuesday Night

Mostly clear, with a low around 69. Northeast wind around 5 mph becoming calm in the evening.

Wednesday

Sunny, with a high near 96. North wind around 5 mph.

Wednesday Night

Mostly clear, with a low around 67. Northeast wind around 5 mph becoming calm in the evening.

Thursday

Sunny, with a high near 98. Calm wind becoming south southwest around 5 mph in the afternoon.