Good evening Tennessee Valley and a very happy Wednesday! Temperatures surpassed the forecast this afternoon with HSV coming in at a very pleasant and 11 degrees above average 63. We even got to enjoy just a few peaks of sunshine through the course of the afternoon. I hope you were able to get out and enjoy it, because some big changes are on the way that could bring some big and unneeded rain to the Tennessee Valley.
With the rain winds will also be an issue at least through the day Thursday. As it stands right now the Tennessee Valley is squished between an area of high pressure to our east and an area of low pressure to the west creating quite the pressure gradient right down the middle. As the aforementioned low continues to move further east the pressure gradient will only become more pronounced and this means our winds increase as early as tonight. For that reason a wind advisory will go in effect tonight at midnight and will expire at midnight Friday. Sustained winds will be 20-25mph with wind gusts near the 35mph mark.
As the low pressure and an associated cold front move east our rain chances will also go up. I expect we’ll stay dry through the early part of the overnight, but widespread rain could encompass the Tennessee Valley by the time we hit the morning commute. Rain will come in two waves the first being the initial wave in the morning with a solid lull through the heart of the afternoon where only scattered showers are possible. The second wave will come Thursday evening and through the overnight as the cold front approaches bringing some heavy rain to the Tennessee Valley. There is the chance for a few thunderstorms, but it doesn’t look like we’ll see anything meeting the parameters for severe weather. We’ll get quite a soaking though with the latest model runs suggesting almost three inches east of I-65 by 12:00PM Saturday. This rain is not needed and the combination of that plus the strong winds will make for a hazardous day Thursday and could result in small trees being knocked over thanks to the saturated ground.
The rain looks to come to an end Friday afternoon and those west of I-65 will begin to see some clearing that will lead to some late afternoon sunshine. This will carry nicely into Saturday where a mostly cloudy but mostly dry day is expected.
Things get interesting once again come Sunday and NYE as another system looks to come and bring some more heavy rain to close out 2018. This also ahead of a cold front that looks to pass through the Tennessee Valley during the day Tuesday causing temperatures to decrease through the day. It would also make for a rather cool and below average Thursday.