Precipitation continues to advance in from the southwest and as it runs into dry air it will cause the air to cool and for the precipitation type to fall in the form of sleet initially along the I-20 corridor and then fall as rain, especially south of I-20. Farther north, the column of air will be cold enough for snow predominantly though some brief mixing with sleet or rain initially can't be ruled out. So while the freezing line shifts northward initially today, as the atmosphere dynamically cools with the approach of an upper level low, we'll see the freezing line shift back southward. It may even waver north and south at times switching precipitation types across a short distance. We think the rain/snow line will set up somewhere close to Tuscaloosa to Birmingham to Anniston and wiggle north and south across Tuscaloosa, Jefferson, St. Clair and Calhoun counties. Because of this, snowfall totals will be much less to the south of the I-20 corridor than compared to the north. The overall best chance for a lot of snow today sets up along the highway 278 corridor. Snowfall rates will be most intense and potentially exceed 1" per hour between 1pm-6pm. Thundersnow can't even be ruled out this afternoon which tells you just how intense this system is and if it occurs where you live then expect it to pour snow instead of rain. Travel conditions go downhill today due to accumulating wintry precipitation and that's why there is a winter storm warning in effect.
That's the scoop, we will post more updates later and look for live updates on Fox 6 at the top and bottom of each hour!
Jill Gilardi Fox 6 Meteorologist