We've been telling you for a week that snow is unlikely tomorrow and Saturday for the Tennessee Valley. While it is still unlikely, snow will fall close to the Tennesseee Valley. Although snow is not likely, a slight chance for brief, light snow exists along the southern sections of DeKalb and Marshall counties. If it happens, it will happen on Friday morning. Accumulation is not likely, even in the areas that see any snow. Winter Weather Advisories are in effect south of us, including in and around Birmingham. Now that the time has come for the snow to develop nearby, some small scale weather happenings can mean some small changes. Those small scale weather features are not easy to see more than a few hours to a day in advance.
The moisture is present over central and southern Alabama and over Mississippi and Louisiana. The cold air in place will grow colder as another cold front slides south through the Southeastern U.S. and even colder air follows that cold front. Temperatures will drop into the 20s tonight from the Tennessee Valley to nearly the Gulf Coast. IF any of that moisture down south sneaks northward along the leading edge of the colder air, some snow flakes will become possible. A slight upslope wind into the Sand Mountain Region can contribute to the cause. In the Tennessee Valley, that will be limited to DeKalb and Marshall counties IF it happens.
This evening will be cloudy with temperatures dropping from 40s to 30s. Tomorrow morning will be cloudy and cold with mid-20s. IF snow happens, it's most likely to happen in DeKalb and Marshall counties. Even that is only a slight chance. Snow is unlikely for the rest of the Tennessee Valley. Sun will start peeking out from behind the clouds tomorrow afternoon. Highs will be in the 30s.