Heavy Rain and Flooding Threat in the Central U.S.; Winter Weather in Northern Alaska

Strong thunderstorms and heavy rain may produce flash flooding across the south-central Plains and lower Mississippi Valley today. The North Slope in Alaska will see the potential for wintry weather through today with ice accumulations possible on roadways. Incoming storms will bring long duration rainfall and strong winds to most of Southcentral Alaska through Friday. Read More >

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Mostly Cloudy

83°F

28°C

Humidity	79%
Wind Speed	SW 13 mph
Barometer	30.08 in (1017.7 mb)
Dewpoint	76°F (24°C)
Visibility	10.00 mi
Heat Index	91°F (33°C)
Last update	28 Aug 8:56 am CDT

More Information:

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

Extended Forecast for

San Marcos TX

Today
High: 98 °F
Sunny
Tonight
Low: 76 °F
Mostly Clear
Friday
High: 98 °F
Mostly Sunny
then Slight
Chance
T-storms
Friday Night
Low: 75 °F
Slight Chance
T-storms then
Partly Cloudy
Saturday
High: 97 °F
Mostly Sunny
then Chance
T-storms
Saturday Night
Low: 74 °F
Chance
T-storms
Sunday
High: 90 °F
Chance
Showers then
Chance
T-storms
Sunday Night
Low: 73 °F
Chance
T-storms
Labor Day
High: 90 °F
Chance
Showers then
Chance
T-storms

Detailed Forecast

Today

Sunny, with a high near 98. Heat index values as high as 102. South southwest wind 5 to 10 mph.

Tonight

Mostly clear, with a low around 76. South wind 5 to 10 mph.

Friday

A slight chance of showers between 1pm and 4pm, then a slight chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 98. Heat index values as high as 102. South southwest wind 5 to 10 mph. Chance of precipitation is 20%.

Friday Night

A slight chance of thunderstorms before 7pm. Partly cloudy, with a low around 75. South southeast wind around 5 mph. Chance of precipitation is 10%.

Saturday

A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 97. South southwest wind around 5 mph becoming east in the afternoon.

Saturday Night

A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 74. East wind around 5 mph becoming calm after midnight. Chance of precipitation is 40%.

Sunday

A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 90. East southeast wind around 5 mph becoming south southwest in the morning.

Sunday Night

A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 73. Northeast wind 5 to 10 mph.

Labor Day

A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 90. North northeast wind around 5 mph. Chance of precipitation is 30%.

Monday Night

Partly cloudy, with a low around 71.

Tuesday

A 20 percent chance of showers and thunderstorms. Sunny, with a high near 93.

Tuesday Night

Mostly clear, with a low around 71.

Wednesday

Sunny, with a high near 95.