A Flash Flood Watch is in effect until 9 AM Friday for North Alabama and most of Southern Tennessee. Up to five inches of rain may fall through Friday morning; however, most on average will only get around two to three inches before it tapers off between 9 AM and noon.
Soggy ground and occasional wind gusts over 30 miles per hour may cause some power outages, and a few trees could topple because of the soggy ground. Believe it or not, the sun may make an appearance before Friday is over! Clouds thin out in the afternoon, and we’ll see around 24 to 36 hours of dry weather before rain moves in again Saturday night.
How much rain? The short-term totals will be impressive on their own: around 2-3” overnight with some spots getting as much as 5 inches in all.
Add in some more steady soaking rain Sunday and then one more wave of very heavy rain and some storms Monday, and it gets a little ridiculous.
The GEFS ensemble probability (one of the tools we use to forecast a ‘rain chance’ for a given day) shows an amazing 30-50% chance of at least six inches of rain through next Monday night!
Huntsville could move from the 41st wettest December on record to the 9th or 10th-place spot by 11:59 PM Monday if it rains more than 4.33” at Huntsville International by that time. As crazy as it sounds, that’s well with in the realm of possibility.
Rain will continue through the morning on New Year’s Day as temperatures start sliding behind a strong cold front. The ‘high’ on Tuesday may occur in the morning with steady or slowly falling temperatures through the day. There might even be enough moisture left for some light snow showers to develop behind the rain Tuesday into early Wednesday: no accumulation expected.