Good evening Tennessee Valley and a very Happy Friday! A dreery Sunday afternoon with occasional rain or mist and absolutely no sunshine. Still temperatures managed to climb into the mid-50s with HSV finishing the day at 55 degrees.
Clouds will begin to clear tonight from west to east and temperatures will drop very quickly because of that. I am confident many of us will start Christmas eve mostly clear but in the low 30s and maybe even the upper 20s in the rural locations. Still through the course of the afternoon skies will remain mostly clear and temperatures will warm into the lower 50s which is average for late December. I noticed an approaching shortwave which could usher in a few clouds Sunday evening and overnight, but those shouldn’t give Santa any trouble and may allow temperatures to stay a few degrees warmer Christmas Eve night while still dipping down into the 30s.
Christmas day looks to be mostly dry with only remote chances for a couple scattered showers especially across NW Alabama. This thanks to a very gradual increase in SW flow through Christmas Day that will also cause an increase in cloud cover as the day goes on. Temperature wise we’ll be just at or just above average with highs right around 53 or 54 degrees.
Mostly Cloudy for Wednesday, but we should remain mostly dry with the best chance of showers coming in the evening as the approaching trough responsible for the ridging pattern and increase in SW flow draws closer. The increase in SW flow will make for a nice warming trend with Wednesday looking to finish right at 60 degrees.
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.
Next weekend is kind of challenging. I noticed very broad ridging to the south, but at the same time I noticed an upper level trough to the north. Models haven’t the slightest what to make of that just yet.