Severe Thunderstorms Forecast for Portions of the Plains, Mississippi Valley, and Mid South

Intense and widespread severe thunderstorms are expected Friday afternoon into the overnight hours across parts of the middle Mississippi Valley and Mid-South vicinity, eastward to the lower Ohio and Tennessee Valleys. Strong and damaging wind gusts are forecast along with several strong tornadoes. Farther north, heavy snow and blizzard conditions are possible over the Upper Midwest. Read More >

En Español

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Overcast

75°F

24°C

Humidity	88%
Wind Speed	S 15 mph
Barometer	29.90 in (1011.8 mb)
Dewpoint	71°F (22°C)
Visibility	10.00 mi
Last update	30 Mar 3:56 pm CDT

More Information:

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

Extended Forecast for

San Marcos TX

This
Afternoon

Chance
Showers
High: 78 °F
Tonight

Chance
Showers then
Cloudy
Low: 67 °F
Friday

Gradual
Clearing
High: 90 °F
Friday
Night

Partly Cloudy
Low: 53 °F
Saturday

Mostly Sunny
High: 84 °F
Saturday
Night

Mostly Cloudy
Low: 59 °F
Sunday

Mostly Cloudy
then Slight
Chance
T-storms
High: 88 °F
Sunday
Night

Mostly Cloudy
Low: 66 °F
Monday

Partly Sunny
High: 95 °F

Detailed Forecast

This Afternoon

A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 78. South wind around 20 mph, with gusts as high as 30 mph.

Tonight

A 30 percent chance of showers and thunderstorms, mainly before 7pm. Cloudy, with a low around 67. South southeast wind 15 to 20 mph, with gusts as high as 25 mph.

Friday

Cloudy through mid morning, then gradual clearing, with a high near 90. South southwest wind 10 to 15 mph, with gusts as high as 25 mph.

Friday Night

Partly cloudy, with a low around 53. West northwest wind 5 to 10 mph becoming north after midnight.

Saturday

Mostly sunny, with a high near 84. North northwest wind 5 to 10 mph becoming east northeast in the afternoon.

Saturday Night

Mostly cloudy, with a low around 59. East wind 5 to 10 mph.

Sunday

A 20 percent chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 88. South wind 5 to 10 mph increasing to 10 to 15 mph in the afternoon. Winds could gust as high as 25 mph.

Sunday Night

Mostly cloudy, with a low around 66. South wind 10 to 15 mph, with gusts as high as 25 mph.

Monday

Partly sunny, with a high near 95. South wind 10 to 15 mph, with gusts as high as 25 mph.

Monday Night

Mostly cloudy, with a low around 70.

Tuesday

Mostly cloudy, with a high near 95.

Tuesday Night

A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 65.

Wednesday

A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 81.