Strong to Severe Thunderstorms in the East; Heat in the Central and Western U.S.

Strong to potentially severe thunderstorms with damaging wind gusts are forecast Thursday from parts of New England into the Mid Atlantic and Carolinas. Significant heat will expand across the West and Central Plains through Friday, potentially breaking daily high temperature records. Dangerous heat will then build into the Eastern U.S. this weekend through much of next week. Read More >

Current conditions at

Knoxville (KOXV)

Lat: 41.3°NLon: 93.12°WElev: 928ft.

Fair

63°F

17°C

Humidity 94%
Wind Speed W 7 mph
Barometer 29.91 in
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Last update 19 Jun 1:15 am CDT
Extended Forecast for

4 Miles ENE Swan IA

Extreme Heat Watch June 21, 12:00pm until June 22, 09:00pm
Click here for hazard details and duration
Extreme Heat Watch
  • Overnight

    Overnight: Mostly clear, with a low around 60. West northwest wind around 6 mph.

    Low: 60 °F

    Mostly Clear

  • Juneteenth

    Juneteenth: Sunny, with a high near 87. West wind 5 to 8 mph.

    High: 87 °F

    Sunny

  • Thursday Night

    Thursday Night: A 20 percent chance of showers and thunderstorms after 3am.  Mostly clear, with a low around 68. South wind 6 to 9 mph.

    Low: 68 °F

    Mostly Clear
    then Slight
    Chance
    T-storms

  • Friday

    Friday: A 20 percent chance of showers and thunderstorms before 9am.  Sunny, with a high near 94. Breezy, with a south wind 10 to 20 mph, with gusts as high as 30 mph.

    High: 94 °F

    Slight Chance
    T-storms then
    Sunny and
    Breezy

  • Friday Night

    Friday Night: Clear, with a low around 78. Breezy, with a south wind around 18 mph, with gusts as high as 29 mph.

    Low: 78 °F

    Clear and
    Breezy

  • Saturday

    Saturday: Sunny, with a high near 96. Windy.

    High: 96 °F

    Sunny and
    Windy

  • Saturday Night

    Saturday Night: Clear, with a low around 77. Breezy.

    Low: 77 °F

    Clear and
    Breezy

  • Sunday

    Sunday: Sunny, with a high near 96. Windy.

    High: 96 °F

    Sunny and
    Windy

  • Sunday Night

    Sunday Night: Clear, with a low around 75. Breezy.

    Low: 75 °F

    Clear and
    Breezy then
    Mostly Clear

Detailed Forecast

Overnight
Mostly clear, with a low around 60. West northwest wind around 6 mph.
Juneteenth
Sunny, with a high near 87. West wind 5 to 8 mph.
Thursday Night
A 20 percent chance of showers and thunderstorms after 3am. Mostly clear, with a low around 68. South wind 6 to 9 mph.
Friday
A 20 percent chance of showers and thunderstorms before 9am. Sunny, with a high near 94. Breezy, with a south wind 10 to 20 mph, with gusts as high as 30 mph.
Friday Night
Clear, with a low around 78. Breezy, with a south wind around 18 mph, with gusts as high as 29 mph.
Saturday
Sunny, with a high near 96. Windy.
Saturday Night
Clear, with a low around 77. Breezy.
Sunday
Sunny, with a high near 96. Windy.
Sunday Night
Clear, with a low around 75. Breezy.
Monday
A 30 percent chance of showers after 1pm. Sunny, with a high near 95.
Monday Night
A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 73.
Tuesday
A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 93.
Tuesday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 71. Chance of precipitation is 60%.
Wednesday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 86. Chance of precipitation is 60%.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles ENE Swan IA
 41.49°N 93.22°W
10:49 pm CDT Jun 18, 2025
1am CDT Jun 19, 2025-6pm CDT Jun 25, 2025
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database