Warm weather is almost at its end. Rain tomorrow, and then much cooler again.

It's another partly sunny and warm day across the Tennessee Valley. Temperatures this afternoon are once again up into the low to mid 70s, with a very gusty southwest wind today. If you are a fan of the warmer weather, we hate to give the bad news, but this is the last warm day you will see for a while. Big weather changes are on the way, and they begin later tonight.

Clouds steadily increase as we head through the evening. This will keep temperatures up, staying in the upper 50s and lower 60s through the evening, and then leveling off near there ahead of the front through the overnight. After midnight, a few showers may develop well ahead of the front over northwest Alabama into southern Tennessee. Before daybreak, the front will start moving into the region, increasing the coverage of showers from northwest to southeast and bringing in the cooler air. That continues through the morning and midday, with temperatures actually falling through the morning, out of the upper 50s and lower 60s, into the mid 40s by late morning and midday. IF the clouds clear early enough so that there is some sun by late in the day, temperatures may rebound back into the mid 50s by afternoon. However, clouds are notorious for taking longer than expected to clear behind cold fronts this time of the year, and if that is the case, afternoon temperatures may not rebound much at all.

Clouds definitely clear out Thursday evening, and that allows temperatures to drop quickly overnight, so that we start Friday morning in the upper 20s. There may even be some rural areas in the mid 20s by daybreak on Friday. Then, as high pressure centers overhead Friday, skies remain sunny, but afternoon highs only rebound into the lower 50s at most. That high shifts east by Saturday, and we start to get more of a southerly wind again. That allows temperatures to moderate back toward the upper 50s to maybe 60 degrees.