Good evening Tennessee Valley and a very Merry Christmas! Not a bad Christmas, though we did have to deal with some overcast skies and only a few peaks of sunshine this afternoon. Still temperatures managed to warm into the upper 40s and lower 50s today which is just below average for Christmas Day. The good news? The clouds will hang around through the overnight, and that means temperatures will only dip down into the upper 30s and lower 40s across the Tennessee Valley.
We’ll continue to see an increase in southerly flow tomorrow as an upper level ridge continues to build thanks to a developing upper level trough that will continue to deepen as it moves east over the next 24 hours. This will provide ample moisture through the day tomorrow, but it will also allow temperatures to warm into the upper 50s and even 60 degrees. Keep in mind average for late December is right around 51 or 52 degrees. While we’ll be mostly cloudy we should stay dry.
That changes Thursday as scattered showers will filter in through the day becoming much heavier Thursday night and through Friday morning. This thanks to the low associated with the aforementioned upper level trough moving north into the Dakotas and upper Midwest. This system will fall apart Friday, and I actually believe we could see a fair amount of dry time to close the workweek.
There could once again be concerns for river flooding after the initial round of rain Thursday and Friday. PWATS are near 1.5” and rain totals are around 2”-4”
That doesn’t last long because another developing trough will begin to move in bringing scattered showers to the forecast once again for the weekend.