National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

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

Current conditions at

San Antonio Boerne Stage Field (K5C1)

Lat: 29.72°NLon: 98.69°WElev: 1385ft.

Fair

79°F

26°C

Humidity 79%
Wind Speed Calm
Barometer 29.66 in
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index82°F (28°C)
Last update 17 Jun 9:35 pm CDT
Extended Forecast for

Blanco TX

Heat Advisory June 18, 12:00pm until June 18, 08:00pm
Click here for hazard details and duration
Heat Advisory

  • Tonight

    Tonight: Mostly clear, with a low around 76. South wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 76 °F

    Mostly Clear

  • Thursday

    Thursday: Partly sunny, then gradually becoming sunny, with a high near 95. Heat index values as high as 107. South wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 95 °F

    Becoming
    Sunny

  • Thursday Night

    Thursday Night: A slight chance of showers and thunderstorms before 1am, then a slight chance of showers and thunderstorms after 4am. Increasing clouds, with a low around 78. Southeast wind 5 to 10 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.

    Low: 78 °F

    Slight Chance
    T-storms

  • Juneteenth

    Juneteenth: A 10 percent chance of showers and thunderstorms before 7am. Cloudy, then gradually becoming mostly sunny, with a high near 90. Southeast wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 90 °F

    Slight Chance
    T-storms

  • Friday Night

    Friday Night: A chance of showers and thunderstorms before 1am, then a slight chance of showers between 1am and 4am, then a slight chance of showers and thunderstorms after 4am. Mostly cloudy, with a low around 76. Southeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 40%.

    Low: 76 °F

    Chance
    T-storms then
    Chance
    Showers

  • Saturday

    Saturday: A slight chance of thunderstorms before 7am, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 90. South southeast wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 40%.

    High: 90 °F

    Slight Chance
    T-storms then
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A slight chance of showers and thunderstorms. Partly cloudy, with a low around 75. South southeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

    Low: 75 °F

    Slight Chance
    T-storms

  • Sunday

    Sunday: Mostly sunny, with a high near 93. South wind around 15 mph, with gusts as high as 30 mph.

    High: 93 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 76. South southeast wind around 15 mph, with gusts as high as 30 mph.

    Low: 76 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 76. South wind 5 to 10 mph, with gusts as high as 20 mph.
Thursday
Partly sunny, then gradually becoming sunny, with a high near 95. Heat index values as high as 107. South wind 10 to 15 mph, with gusts as high as 25 mph.
Thursday Night
A slight chance of showers and thunderstorms before 1am, then a slight chance of showers and thunderstorms after 4am. Increasing clouds, with a low around 78. Southeast wind 5 to 10 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.
Juneteenth
A 10 percent chance of showers and thunderstorms before 7am. Cloudy, then gradually becoming mostly sunny, with a high near 90. Southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Friday Night
A chance of showers and thunderstorms before 1am, then a slight chance of showers between 1am and 4am, then a slight chance of showers and thunderstorms after 4am. Mostly cloudy, with a low around 76. Southeast wind 5 to 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 90. South southeast wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 40%.
Saturday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 75. South southeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Sunday
Mostly sunny, with a high near 93. South wind around 15 mph, with gusts as high as 30 mph.
Sunday Night
Mostly clear, with a low around 76. South southeast wind around 15 mph, with gusts as high as 30 mph.
Monday
Mostly sunny, with a high near 94.
Monday Night
Mostly clear, with a low around 75.
Tuesday
Mostly sunny, with a high near 94.
Tuesday Night
Partly cloudy, with a low around 74.
Wednesday
Mostly sunny, with a high near 95.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Blanco TX
 30.1°N 98.42°W (Elev. 1299 ft)
Last Update:
9:44 pm CDT Jun 17, 2026
Forecast Valid:
9pm CDT Jun 17, 2026-6pm CDT Jun 24, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation