Our sojourn to the south is nearly at an end, but we have one more stop in eastern Tennessee. The Smokey Mountains have a microclimate that allows for a great deal more fog and haze than other parts of the country. Is that going to show up in our temperature forecasts?
At 153PM, ET, Knoxville was reporting a temperature of 88 degrees with sunny skies. The remnants of Gordon lingered over northern Arkansas, and the flow enhanced a stationary boundary south of the Ohio River. Because of this enhancement, warm, moist air was being entrained into the boundary at an elevated pace, and the orographic lift over the Smokeys was leading to some isolated thunderstorms in and around the peaks of the region.
As the remnants of Gordon move northeast towards Ohio, generally following along with the existing stationary boundary, though lifting it northward ever so slightly, the warm sector, including Knoxville, will become even more embedded within a very moist, unstable flow. Because the feed into Knoxville will be over the mountains, expect a fairly dry, if muggy Saturday, but things will get a bit more active as a well defined cold front develops through the Tennessee Valley, and moved into town on Sunday night.
Tomorrow – Isolated showers and storms, especially in the afternoon, High 87, Low 72
Sunday – Mostly sunny, with increasing clouds and rain late, High 86, Low 71
TWC: Tomorrow – Partial cloudiness early, with scattered showers and thunderstorms in the afternoon High 89, Low 69
Sunday – Considerable cloudiness. A stray shower or thunderstorm is possible. High 87, Low 69
AW: Tomorrow – Clouds and sun, a thunderstorm; humid High 87, Low 70
Sunday – Mostly cloudy, humid; a shower or thunderstorm in spots in the afternoon High 85, Low 69
NWS: Tomorrow – A 20 percent chance of showers and thunderstorms after noon. Patchy fog before 8am. Otherwise, partly sunny, High 87, Low 70
Sunday – A 50 percent chance of showers and thunderstorms. Partly sunny High 87, Low 70
WB: Tomorrow – Partly cloudy. Slight chance of thudnerstorms in the morning, then chance of thunderstorms in the afternoon. High 89, Low 73
Sunday – Mostly cloudy with a 50 percent chance of thunderstorms, High 86, Low 73
WN: Tomorrow – Partly cloudy with scattered storms, High 87 Low 70
Sunday – Partly cloudy with scattered showers, High 87, Low 60
FIO: Tomorrow – Mostly cloudy throughout the day.High 88, Low 70
Sunday – Mostly cloudy throughout the day. High 881, Low 71
You don’t have to be along a coast to be affected with tropical features, but fortunately for Knoxville, you do need a mountain range to find yourself in a rain shadow. Here is the radar showing the popcorn showers and storms presently ongoing.