Tropical Storm Arthur and Heavy Rainfall in the South; Severe Weather in the Midwest

An outbreak of severe thunderstorms is expected across portions of Illinois and Indiana tonight. Intense tornadoes, swaths of damaging gusts, and hail in excess of 2 inches in diameter possible. Tropical Storm Arthur will continue to produce strong winds across coastal Upper Texas and Louisiana tonight, as well as potentially life-threatening flooding across southern Louisiana into Mississippi. Read More >

Hazardous Weather Conditions

Extreme Heat Warning in effect from June 18, 12:00 PM CDT until June 18, 08:00 PM CDT

Current conditions at

San Antonio, San Antonio International Airport (KSAT)

Lat: 29.53°NLon: 98.46°WElev: 807ft.

Fair

84°F

29°C

Humidity	65%
Wind Speed	S 8 mph
Barometer	29.63 in (1001.3 mb)
Dewpoint	71°F (22°C)
Visibility	10.00 mi
Heat Index	89°F (32°C)
Last update	17 Jun 9:51 pm CDT

More Information:

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

Extended Forecast for

3 Miles NNW Balcones Heights TX

Extreme Heat Warning June 18, 12:00pm until June 18, 08:00pm

Click here for hazard details and duration

Extreme Heat Warning

Tonight
Low: 77 °F
Mostly Clear
Thursday
High: 96 °F
Mostly Sunny
Thursday Night
Low: 79 °F
Increasing
Clouds
Juneteenth
High: 92 °F
Partly Sunny
Friday Night
Low: 77 °F
Chance
T-storms then
Chance
Showers
Saturday
High: 91 °F
Slight Chance
T-storms then
Chance
T-storms
Saturday Night
Low: 76 °F
Chance
T-storms
Sunday
High: 94 °F
Partly Sunny
Sunday Night
Low: 77 °F
Mostly Clear

Detailed Forecast

Tonight

Mostly clear, with a low around 77. South southeast wind around 5 mph.

Thursday

Mostly sunny, with a high near 96. Heat index values as high as 110. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.

Thursday Night

Increasing clouds, with a low around 79. Southeast wind around 10 mph, with gusts as high as 20 mph.

Juneteenth

Partly sunny, with a high near 92. Heat index values as high as 103. Southeast wind 5 to 10 mph, with gusts as high as 20 mph.

Friday Night

A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 4am, then a chance of showers and thunderstorms after 4am. Mostly cloudy, with a low around 77. Southeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 40%.

Saturday

A slight chance of thunderstorms before 7am, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 91. South southeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 50%.

Saturday Night

A chance of showers and thunderstorms. Partly cloudy, with a low around 76. Southeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 40%.

Sunday

Partly sunny, with a high near 94. South wind 10 to 15 mph, with gusts as high as 25 mph.

Sunday Night

Mostly clear, with a low around 77. South southeast wind 10 to 15 mph, with gusts as high as 25 mph.

Monday

Mostly sunny, with a high near 96.

Monday Night

Mostly clear, with a low around 76.

Tuesday

Mostly sunny, with a high near 95.

Tuesday Night

Mostly clear, with a low around 76.