Knoxville Weather Alert: Major March Storms Bring Tornado Risk and Temperature Plunge—What You Need to Know Now

Knoxville, TN – Temperatures across East Tennessee are about to do an about-face. After a spring-like weekend that pushed highs into the 70s, the National Weather Service says a strong Arctic front will barrel through the Tennessee Valley early Monday, March 16, sending the mercury tumbling from a forecast high of 62 °F to a bone-chilling low near 24 °F by day’s end. Light snow could mix with the rain during the frontal passage, but the Weather Service expects little or no accumulation in the city; only the higher peaks of the Smokies may pick up a light coating. What will be more noticeable is the wind: brisk northwest gusts will drive wind-chill values below zero overnight in the mountains and into the teens for metro Knoxville commuters Tuesday morning. St. Patrick’s Day on Tuesday, March 17, will feel anything but lucky if you’re looking for spring. Afternoon readings are forecast to stall in the lower 40s before slowly moderating mid-week. For reference, the long-term March average is 61 °F/40 °F, so this cold snap will put Knoxville roughly 20 degrees below normal. Veteran East Tennesseans chalk the roller-coaster ride up to one of the state’s six “little winters,” brief bursts of chill that follow early spring warmth. This event arrives a mere four days before the astronomical start of spring on March 20, reinforcing the old saying: “Don’t plant the garden until after the dogwoods bloom.” What to know: • Dress in layers and keep winter gear handy for Monday night and Tuesday morning bus stops. • Protect early blossoms and sensitive plants; freezing temps are likely across Knox County. • Mountain travelers should prepare for slick spots and dangerously low wind chills on exposed ridges. Looking ahead, long-range guidance points to a gradual rebound into the 50s by mid-week and the 60s by next weekend, giving Knoxville a shot at more seasonal warmth just in time for the first full weekend of spring. Until then, brace for a sharp but short-lived taste of winter in the heart of March.