Cold Temperatures Across the Northern and Central Plains; Severe Weather Potential for the East

Severe weather and heavy rainfall potential along with warm temperatures will affect the eastern portions of the country through Sunday as a cold front tracks eastward. Meanwhile, much colder air across portions of the Plains will bring frost and freeze conditions into Sunday morning. Dry, mild and breezy conditions linger for the four-corner region where elevated to critical fire weather remains. Read More >

Hazardous Weather Conditions

En Español

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Fair

87°F

31°C

Humidity	59%
Wind Speed	SE 10 mph
Barometer	29.87 in (1010.4 mb)
Dewpoint	71°F (22°C)
Visibility	10.00 mi
Heat Index	93°F (34°C)
Last update	21 May 8:56 pm CDT

More Information:

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

Extended Forecast for

5 Miles SW San Marcos TX

Severe T-storm Watch until May 21, 11:00pm

Severe T-storm Warning until May 21, 10:15pm

Click here for hazard details and duration

...

Severe T-storm Watch until May 21, 11:00pm
Severe T-storm Warning until May 21, 10:15pm

NOW: Multiple
hazards in effect

Click HERE for Details
Tonight

Severe
Thunderstorms
Low: 65 °F
Sunday

Chance
T-storms
High: 79 °F
Sunday
Night

Mostly Cloudy
Low: 66 °F
Monday

Chance
T-storms then
T-storms
Likely
High: 84 °F
Monday
Night

T-storms
Likely
Low: 68 °F
Tuesday

T-storms
Likely
High: 82 °F
Tuesday
Night

Chance
T-storms
Low: 70 °F
Wednesday

Chance
T-storms
High: 82 °F

Detailed Forecast

Tonight

A 50 percent chance of showers and thunderstorms. Some of the storms could be severe. Mostly cloudy, with a low around 65. East wind 10 to 15 mph becoming north northeast after midnight. Winds could gust as high as 20 mph. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Sunday

A 30 percent chance of showers and thunderstorms, mainly before 7am. Mostly cloudy, with a high near 79. North northeast wind around 15 mph, with gusts as high as 25 mph.

Sunday Night

Mostly cloudy, with a low around 66. Northeast wind around 10 mph, with gusts as high as 20 mph.

Monday

Showers and thunderstorms likely, mainly after 1pm. Cloudy, with a high near 84. Northeast wind 5 to 15 mph becoming southeast in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 70%.

Monday Night

Showers and thunderstorms likely. Cloudy, with a low around 68. Southeast wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.

Tuesday

Showers and thunderstorms likely. Mostly cloudy, with a high near 82. South wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 70%.

Tuesday Night

A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 70. South southeast wind 10 to 15 mph, with gusts as high as 20 mph.

Wednesday

A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 82. South wind 10 to 15 mph becoming north in the afternoon. Winds could gust as high as 25 mph.

Wednesday Night

A chance of showers and thunderstorms before 1am, then a slight chance of showers. Partly cloudy, with a low around 62. North wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.

Thursday

Sunny, with a high near 82.

Thursday Night

Mostly clear, with a low around 62.

Friday

Sunny, with a high near 86.

Friday Night

Mostly clear, with a low around 64.

Saturday

Sunny, with a high near 90.