Storm in southern Walker County still looks dangerous to me. It does have some rotation, and is at least a damaging wind threat.
00 UTC BMX sounding shows 0-3 km helicity of about 350, and a little bit of instability.
Gravity waves also appear to be forming on radar out ahead of and perpendicular to the line of storms, moving rapdily NE…our research at UAH shows that these may enhance storms and their rotation, at least temporarily, as they pass through.
The outflow ahead of the main line of storms appears to be forming new storms out ahead of the main line, so storms will be moving into Jefferson County soon, and showers are already here. This outflow appears to cutting off the inflow a little to the main storms.
NASA North Alabama LMA shows lightning in the storms from Walker County on northward.
