Another System Brings Cool Air Next Week

Rainfall is beginning to peter out this morning as remnants of Beta continue to work eastward. The latest 24-hour precipitation accumulation map shows totals near the 4 inch mark for parts of McMinn to the south of Knoxville. The remainder of the area is lying in the 2 to 2.5 inch mark from Chattanooga to Jefferson City. All in all, movement of the system did work a bit further east with the later models we saw yesterday. Flooding conditions stayed limited as of this morning but if you have a report, you may send it to SecretCityWx@aol.com or by tagging us on social media. 

Looking at the latest surface map, the low associated with Beta is working east, leaving a bit of drier air in behind. Unfortunately, this won't stick around too long as another system to the north and west will swoop through. This will allow for scattered showers the second half of the weekend and into early next week. Following the system, a steep cold front will leave high's Wednesday and onward in the lower 70's to mid/upper 60's. 

Doing a little teleconnection analysis, the Arctic Oscillation is phasing towards a negative signature....so what does that mean? As a brief background, teleconnections are large scale "signals" based on pressure and circulation differences. In this case, a -AO indicates the likelihood for cooler air across the southeast and and weaker trade winds off the coast of Africa. This relationship can be seen as we work into the next 3-8 days. Activity in the Tropics (as of this morning) have all but ceased and cooler temperatures are expected to migrate in the second half of next week. As shown from the graph below, AO will shift back positive, but it will be nice to feel a Fall front and have little activity in the Atlantic. I would also like to mention teleconnections are not see all be all, they are only guidance to help in a longer term forecast. 

As showers work out this morning, drier air will move in tonight. For the most part, expect showers to be out of the Valley by 2pm this afternoon. Most of us will stay dry tonight and through Saturday before scattered showers return Sunday and Monday with the next system. Once the cold front moves through, Wednesday, sunny skies will remain as cool dry air dominates behind the front. 

With lots on the plate today, check out all the details through the video forecast below. If Secret City Weather can help you, be sure to shoot us an email or visit our "Services" tab above. Have a wonderful weekend and check in on Twitter/Facebook for updates throughout the next couple of days.