As verification approaches on the NAM, the longwave over the MS Valley is slowing down and digging deeper into the eastern side of the Rockies ridge. This allows for more intense/prolonged moist SWly flow off the GOM, favoring more QPF & more snow for parts of the SE US. pic.twitter.com/yvtIdl0xEN

— Eric Webb (@webberweather) January 15, 2018