Tracking a Winter Storm; Unusual Early-Season Heat Wave in the Southwest

A major winter storm will organize across the Northern Plains today and then rapidly strengthen as it moves into the Great Lakes on Sunday. Heavy snow and blowing snow are likely to persist over the Great Lakes into Monday night. Dry and gusty winds will produce a critical fire risk across the central/southern Plains. An early heatwave will begin to intensify over the western U.S. into next week. Read More >

Hazardous Weather Conditions

Current conditions at

Knoxville, McGhee Tyson Airport (KTYS)

Lat: 35.82°NLon: 83.99°WElev: 981ft.

Fair

51°F

11°C

Humidity 69%
Wind Speed N 3 mph
Barometer 30.02 in (1016.2 mb)
Dewpoint 41°F (5°C)
Visibility 10.00 mi
Last update 15 Mar 12:53 am EDT
Extended Forecast for

Louisville TN

  • Overnight

    Overnight: Increasing clouds, with a low around 50. South wind around 5 mph.

    Low: 50 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Partly sunny, with a high near 73. Breezy, with a south wind 5 to 10 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph.

    High: 73 °F

    Partly Sunny
    then Mostly
    Cloudy and
    Breezy

  • Sunday Night

    Sunday Night: Showers, mainly after 2am.  Low around 37. Breezy, with a south wind 15 to 20 mph, with gusts as high as 40 mph.  Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 37 °F

    Chance
    Showers then
    Showers and
    Breezy

  • Monday

    Monday: Rain showers before 2pm, then a chance of rain and snow showers.  High near 50. Breezy, with a west wind 15 to 20 mph, with gusts as high as 30 mph.  Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

    High: 50 °F

    Showers then
    Rain/Snow
    Likely and
    Breezy

  • Monday Night

    Monday Night: A 30 percent chance of snow showers before 8pm.  Mostly cloudy, with a low around 23. West wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 23 °F

    Chance Snow
    Showers then
    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 41. West wind around 10 mph, with gusts as high as 20 mph.

    High: 41 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 24. Northwest wind around 5 mph becoming calm.

    Low: 24 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 54.

    High: 54 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 33.

    Low: 33 °F

    Partly Cloudy

Detailed Forecast

Overnight
Increasing clouds, with a low around 50. South wind around 5 mph.
Sunday
Partly sunny, with a high near 73. Breezy, with a south wind 5 to 10 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph.
Sunday Night
Showers, mainly after 2am. Low around 37. Breezy, with a south wind 15 to 20 mph, with gusts as high as 40 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Monday
Rain showers before 2pm, then a chance of rain and snow showers. High near 50. Breezy, with a west wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.
Monday Night
A 30 percent chance of snow showers before 8pm. Mostly cloudy, with a low around 23. West wind 10 to 15 mph, with gusts as high as 25 mph.
Tuesday
Mostly sunny, with a high near 41. West wind around 10 mph, with gusts as high as 20 mph.
Tuesday Night
Partly cloudy, with a low around 24. Northwest wind around 5 mph becoming calm.
Wednesday
Mostly cloudy, with a high near 54.
Wednesday Night
Partly cloudy, with a low around 33.
Thursday
Mostly sunny, with a high near 64.
Thursday Night
Mostly clear, with a low around 42.
Friday
Sunny, with a high near 71.
Friday Night
Partly cloudy, with a low around 49.
Saturday
Mostly sunny, with a high near 74.
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ABOUT THIS FORECAST

 
Point Forecast:
Louisville TN
 35.81°N 84.04°W (Elev. 850 ft)
1:06 am EDT Mar 15, 2026
1am EDT Mar 15, 2026-6pm EDT Mar 21, 2026
 
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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