Heat And Possible Flooding To Start Off The Week

Dangerous heat will impact portions of the Northwest, Northeast, and Mid to Lower Mississippi Valley today. Heat advisories are in effect for these major metro areas: Boston, New York City, Philadelphia, Seattle and St. Louis. A few flash flood concerns today from heavy rain and storms in the Four Corners region, northern New England and the western Ohio Valley into the Mid Mississippi Valley. Read More >

Hazardous Weather Conditions

Hazardous Weather Outlook

En Español

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Partly Cloudy

88°F

31°C

Humidity	57%
Wind Speed	S 8 mph
Barometer	29.97 in (1013.8 mb)
Dewpoint	71°F (22°C)
Visibility	10.00 mi
Heat Index	94°F (34°C)
Last update	8 Aug 5:56 pm CDT

More Information:

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

Extended Forecast for

Mountain City TX

Tonight

Slight Chance
T-storms then
Mostly Clear
Low: 73 °F
Tuesday

Hot
High: 99 °F
Tuesday
Night

Mostly Clear
Low: 74 °F
Wednesday

Mostly Sunny
then Slight
Chance
T-storms
High: 99 °F
Wednesday
Night

Slight Chance
T-storms
Low: 75 °F
Thursday

Chance
T-storms
High: 97 °F
Thursday
Night

Slight Chance
T-storms
Low: 74 °F
Friday

Chance
T-storms
High: 95 °F
Friday
Night

Partly Cloudy
Low: 73 °F

Detailed Forecast

Tonight

A 20 percent chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 73. Southeast wind 5 to 10 mph becoming south southwest after midnight. Winds could gust as high as 20 mph.

Tuesday

Sunny and hot, with a high near 99. Heat index values as high as 104. Light south southwest wind becoming south southeast 5 to 10 mph in the morning. Winds could gust as high as 20 mph.

Tuesday Night

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

Wednesday

A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny and hot, with a high near 99. Heat index values as high as 104. South southwest wind 5 to 10 mph becoming east southeast in the afternoon.

Wednesday Night

A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 75. East southeast wind 5 to 10 mph becoming south southwest after midnight.

Thursday

A 40 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 97. Light and variable wind becoming east 5 to 10 mph in the morning.

Thursday Night

A 20 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 74. East southeast wind 5 to 10 mph becoming south southwest after midnight.

Friday

A 30 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 95. Light and variable wind becoming east southeast 5 to 10 mph in the morning. Winds could gust as high as 20 mph.

Friday Night

Partly cloudy, with a low around 73. East southeast wind 5 to 10 mph becoming south after midnight. Winds could gust as high as 20 mph.

Saturday

Mostly sunny, with a high near 97.

Saturday Night

Partly cloudy, with a low around 73.

Sunday

Sunny, with a high near 98.

Sunday Night

Mostly clear, with a low around 73.

Monday

Sunny and hot, with a high near 100.