Knoxville is starting Monday hot and muggy, with temperatures in the mid-70s early and sunshine helping the thermometer climb fast. The city is headed toward a high near 95 degrees, while the heat index could reach 105 before thunderstorms move in.
Storms Arrive During The Afternoon
Showers and thunderstorms could begin developing between 2 p.m. and 4 p.m., with storms most likely around 4 p.m. to 5 p.m. before becoming more scattered into the evening. The National Weather Service in Morristown says some storms may be strong to severe, with damaging wind gusts and brief heavy downpours the main concerns.
Rainfall totals will generally range from a tenth to a quarter-inch, though a stronger storm could produce more in a short time and create localized flash-flooding problems. Southwest winds of 5 to 10 mph may increase the storm threat, so afternoon outdoor plans and the evening commute could get disrupted quickly.
Heat Advisory Runs Through Monday Evening
A Heat Advisory remains in effect for Knoxville and much of the surrounding area until 8 p.m. Monday, with high humidity making the heat more dangerous than the thermometer alone suggests. Residents should drink plenty of fluids, take breaks in air conditioning or shade, avoid strenuous activity during the hottest part of the day and check on people who are especially vulnerable to heat.
Anyone showing signs of heat stroke should be moved to a cool place and treated as a medical emergency by calling 911. Thunderstorms may bring some relief after sunset, but Monday night will stay mostly cloudy and warm, with a low around 73 and another chance of storms before midnight.
Brief Midweek Break Before Storm Chances Return
Tuesday looks noticeably calmer and slightly cooler, with partly sunny skies and a high near 89 degrees, followed by a low around 67 Tuesday night. Wednesday should be sunny and hot again near 92, but rain and thunderstorm chances increase Thursday through Saturday before Sunday turns mostly sunny with a high near 88.
