Severe Thunderstorms in the Southern Plains; Heavy to Excessive Rainfall in South Central Texas

Widespread rain may produce flash flooding across the Southern Plains into the Ozarks today. Numerous instances of flash flooding are expected in south-central Texas, including the Hill Country. There will also be a risk of isolated severe thunderstorms across the southern Plains today, where an instance or two of severe wind, hail, or a brief tornado may occur. Read More >

Hazardous Weather Conditions

Current conditions at

Knoxville, McGhee Tyson Airport (KTYS)

Lat: 35.82°NLon: 83.99°WElev: 981ft.

Mostly Cloudy

61°F

16°C

Humidity 90%
Wind Speed Calm
Barometer 30.12 in (1019.6 mb)
Dewpoint 58°F (14°C)
Visibility 7.00 mi
Last update 20 Nov 11:53 am EST
Extended Forecast for

2 Miles SW Alcoa TN

  • This Afternoon

    This Afternoon: A 10 percent chance of showers after 5pm.  Mostly cloudy, with a high near 69. West wind around 5 mph.

    High: 69 °F

    Slight Chance
    Showers

  • Tonight

    Tonight: Showers likely, mainly before 2am.  Cloudy, with a low around 61. Calm wind becoming southwest around 5 mph.  Chance of precipitation is 70%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 61 °F

    Showers
    Likely

  • Friday

    Friday: A chance of showers and thunderstorms.  Mostly cloudy, with a high near 72. Southwest wind 5 to 10 mph.  Chance of precipitation is 40%.

    High: 72 °F

    Chance
    Showers

  • Friday Night

    Friday Night: Showers likely and possibly a thunderstorm before 1am, then showers between 1am and 4am, then showers and possibly a thunderstorm after 4am.  Low around 61. Southwest wind around 10 mph, with gusts as high as 20 mph.  Chance of precipitation is 90%.

    Low: 61 °F

    Showers
    Likely then
    Showers

  • Saturday

    Saturday: A chance of showers and thunderstorms.  Partly sunny, with a high near 70. Southwest wind around 10 mph becoming northwest in the afternoon.  Chance of precipitation is 50%.

    High: 70 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 45. North wind around 5 mph becoming calm  after midnight.

    Low: 45 °F

    Mostly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 64. Calm wind becoming north around 5 mph.

    High: 64 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 42.

    Low: 42 °F

    Mostly Clear

  • Monday

    Monday: Partly sunny, with a high near 66.

    High: 66 °F

    Partly Sunny

Detailed Forecast

This Afternoon
A 10 percent chance of showers after 5pm. Mostly cloudy, with a high near 69. West wind around 5 mph.
Tonight
Showers likely, mainly before 2am. Cloudy, with a low around 61. Calm wind becoming southwest around 5 mph. Chance of precipitation is 70%. New precipitation amounts between a half and three quarters of an inch possible.
Friday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 72. Southwest wind 5 to 10 mph. Chance of precipitation is 40%.
Friday Night
Showers likely and possibly a thunderstorm before 1am, then showers between 1am and 4am, then showers and possibly a thunderstorm after 4am. Low around 61. Southwest wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 90%.
Saturday
A chance of showers and thunderstorms. Partly sunny, with a high near 70. Southwest wind around 10 mph becoming northwest in the afternoon. Chance of precipitation is 50%.
Saturday Night
Mostly cloudy, with a low around 45. North wind around 5 mph becoming calm after midnight.
Sunday
Sunny, with a high near 64. Calm wind becoming north around 5 mph.
Sunday Night
Mostly clear, with a low around 42.
Monday
Partly sunny, with a high near 66.
Monday Night
A 40 percent chance of showers after 1am. Cloudy, with a low around 50.
Tuesday
Showers. High near 65. Chance of precipitation is 80%.
Tuesday Night
Showers likely. Mostly cloudy, with a low around 53. Chance of precipitation is 60%.
Wednesday
A 30 percent chance of showers. Mostly cloudy, with a high near 63.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SW Alcoa TN
 35.78°N 84.01°W (Elev. 958 ft)
12:31 pm EST Nov 20, 2025
12pm EST Nov 20, 2025-6pm EST Nov 26, 2025
 
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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