Good evening Tennessee Valley and a very Happy Friday! A much better day today which featured sunny skies and highs in the low 50s which is seasonable for this time of year. This pleasant patern doesn’t stick around very long though as a system currently over the Dakotas will pass by to the north bringing scattered showers to the Tennessee Valley on Sunday.
This will be first noticed around 11:00 PM where some will begin to notice a sharp increase in cloud cover. I do expect a few light rain showers to make their presence known during the very early hours of Sunday. By very early hours I mean between 2:00 and 4:00 AM. Scattered showers will likely continue through the morning and first half of the afternoon. Models are suggesting those west of I-65 may clear out just soon enough to get a few peaks of sun in the late afternoon. Those east of I-65 probably will not be as lucky.
Zonal flow should take hold behind that making for sunny skies on Christmas Eve and mostly sunny skies on Christmas Day. On the note of Christmas Day it looks to be warm with a forecast high of 54 degrees. Thanks to a slight increase in southerly flow in the afternoon there is a chance for passing shower across NW Alabama, but the vast majority of us will in fact remain dry. Really a perfect Christmas forecast.
Wednesday night and beyond looks to bring another soaking. A developing trough will bring cause for ridging to develop east of the Mississippi River which will greatly increase our southerly flow into the Tennessee Valley. This developing trough looks to have an associated closed low that will travel north through the day Thursday and Friday along the aforementioned ridge . The good news here is that we will remain on the warm side of the low. The bad news is that Thursday looks to be incredibly wet with PWATS already higher than 1 inch. Rain may linger through Friday, but models have us dry next weekend.