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

Hazardous Weather Conditions

Current conditions at

Lago Vista TX, Rusty Allen Airport (KRYW)

Lat: 30.5°NLon: 97.97°WElev: 1230ft.

Fair

82°F

28°C

Humidity 65%
Wind Speed S 6 mph
Barometer 30.09 in
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Heat Index85°F (29°C)
Last update 21 Aug 1:15 am CDT
Extended Forecast for

Jonestown TX

Heat Advisory August 21, 01:23am until August 23, 07:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory August 21, 01:23am until August 23, 07:00pm

    NOW until 7:00pm Sun

    Heat Advisory

  • Overnight

    Low: 77 °F

    Mostly Clear

  • Friday

    Friday: Sunny and hot, with a high near 102. Heat index values as high as 106. South southwest wind around 5 mph becoming southeast in the afternoon.

    High: 102 °F

    Hot

  • Friday Night

    Friday Night: Mostly clear, with a low around 78. South southeast wind around 5 mph.

    Low: 78 °F

    Mostly Clear

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms after 4pm. Sunny and hot, with a high near 103. Heat index values as high as 107. South southwest wind around 5 mph.

    High: 103 °F

    Sunny then
    Slight Chance
    T-storms

  • Saturday Night

    Saturday Night: A 20 percent chance of showers and thunderstorms before 10pm. Mostly clear, with a low around 79. South wind around 5 mph.

    Low: 79 °F

    Slight Chance
    T-storms then
    Mostly Clear

  • Sunday

    Sunday: Sunny and hot, with a high near 103. Southwest wind around 5 mph.

    High: 103 °F

    Hot

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 79. South southeast wind 5 to 10 mph.

    Low: 79 °F

    Mostly Clear

  • Monday

    Monday: Sunny and hot, with a high near 103. South southwest wind around 5 mph.

    High: 103 °F

    Hot

Detailed Forecast

Overnight
Mostly clear, with a low around 77. South wind around 5 mph.
Friday
Sunny and hot, with a high near 102. Heat index values as high as 106. South southwest wind around 5 mph becoming southeast in the afternoon.
Friday Night
Mostly clear, with a low around 78. South southeast wind around 5 mph.
Saturday
A 20 percent chance of showers and thunderstorms after 4pm. Sunny and hot, with a high near 103. Heat index values as high as 107. South southwest wind around 5 mph.
Saturday Night
A 20 percent chance of showers and thunderstorms before 10pm. Mostly clear, with a low around 79. South wind around 5 mph.
Sunday
Sunny and hot, with a high near 103. Southwest wind around 5 mph.
Sunday Night
Mostly clear, with a low around 79. South southeast wind 5 to 10 mph.
Monday
Sunny and hot, with a high near 103. South southwest wind around 5 mph.
Monday Night
Mostly clear, with a low around 77. South wind 5 to 10 mph.
Tuesday
Sunny and hot, with a high near 102.
Tuesday Night
Mostly clear, with a low around 78.
Wednesday
Sunny and hot, with a high near 103.
Wednesday Night
Mostly clear, with a low around 78.
Thursday
A 20 percent chance of showers and thunderstorms. Sunny and hot, with a high near 101.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Jonestown TX
 30.47°N 97.93°W (Elev. 837 ft)
Last Update:
12:44 am CDT Aug 21, 2026
Forecast Valid:
1am CDT Aug 21, 2026-6pm CDT Aug 27, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation