Excessive Rainfall and Potential Tropical Cyclone in the South; Severe Thunderstorms in the Midwest

Excessive rainfall may produce locally considerable flash flooding over parts of the northwestern Gulf Coast, lower Mississippi River Valley, and Deep South through Thursday. Potential Tropical Cyclone One is forecast to become a tropical storm (Arthur) as it moves along or just off the northwestern Gulf coast through Wednesday. An outbreak of severe weather is forecast in the Midwest Wednesday. Read More >

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Fair

86°F

30°C

Humidity	70%
Wind Speed	SE 9 mph
Barometer	29.76 in (1006.9 mb)
Dewpoint	75°F (24°C)
Visibility	10.00 mi
Heat Index	95°F (35°C)
Last update	16 Jun 5:56 pm CDT

More Information:

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

Extended Forecast for

2 Miles WSW San Marcos TX

Tonight
Low: 72 °F
Chance
T-storms then
Partly Cloudy
Wednesday
High: 91 °F
Decreasing
Clouds
Wednesday Night
Low: 77 °F
Increasing
Clouds
Thursday
High: 96 °F
Decreasing
Clouds
Thursday Night
Low: 79 °F
Partly Cloudy
Juneteenth
High: 93 °F
Mostly Cloudy
then Slight
Chance
T-storms
Friday Night
Low: 77 °F
Chance
T-storms
Saturday
High: 91 °F
Chance
Showers then
Chance
T-storms
Saturday Night
Low: 77 °F
Slight Chance
T-storms

Detailed Forecast

Tonight

A 40 percent chance of showers and thunderstorms before 7pm. Increasing clouds, with a low around 72. East wind around 5 mph becoming calm in the evening.

Wednesday

Mostly cloudy, then gradually becoming sunny, with a high near 91. Heat index values as high as 103. East wind around 5 mph.

Wednesday Night

Increasing clouds, with a low around 77. South southeast wind around 5 mph.

Thursday

Mostly cloudy, then gradually becoming sunny, with a high near 96. Heat index values as high as 113. South wind 5 to 10 mph.

Thursday Night

Partly cloudy, with a low around 79. South southeast wind 5 to 15 mph.

Juneteenth

A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 93. Southeast wind 5 to 10 mph.

Friday Night

A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 77. South southeast wind 5 to 10 mph.