Cooler air has filtered into the Tennessee Valley behind the big cold front we've been talking about for the past several days in our forecast updates. Afternoon temperatures across northern Alabama have managed to sneak into the lower 70s, but southern Tennessee communities are staying in the low to mid 60s this afternoon. Clouds have been slow to clear, but they are on the way out, and skies will clear enough tonight for temperatures to drop into the mid and upper 40s. I can't rule out some lower 40s in some of our naturally colder locations. Mostly sunny skies will be in place for the next several days, with no appreciable rain chances found in the seven day forecast, although we can't rule out a stray shower or sprinkle by Sunday.
The big story for this week is the change in temperatures. We'll be in the low to mid 70s for Wednesday and Thursday, with overnight lows between the upper 40s and mid 50s. However, another cold front swings into the area Thursday night and reinforces the cold air across the Tennessee Valley. Afternoons on Friday will only get into the mid 60s, despite mostly sunny skies, and we can't rule out some locations not getting out of the lower 60s! Overnight lows will dip even further, with temperatures by daybreak Saturday in the lower 40s, with upper 30s and patchy light frost very possible in our naturally colder valleys and "hollers" across the viewing area. That cooler weather looks to continue into at least the first part of next week, with only slight moderation of the temperatures.
We are still keeping our eye on a disturbance in the central Caribbean that is moving westward. The National Hurricane Center gives it a 50% chance of developing into a named system over the next 5 days. There is WAY too much uncertainty in trying to guess where something might go, especially since the system hasn't even developed yet. We'll keep an eye on things and keep you updated. It's very normal to have a second uptick in the tropics as we head toward October. The Atlantic hurricane season does not officially end until the end of November!