...20z Update...
Dangerous tornado outbreak is ongoing and expected to continue this
evening over the Southeast. The main change for the 20z outlook was
to expand the categorical High Risk a bit over southwestern AL and
southern MS, and trim out the severe areas west. A squadron of
intense tornadic supercells will continue east/northeast over
eastern MS, and much of western AL this afternoon and into the
evening. The strongest low-level theta-E advection is occurring
across southeastern MS and west/southwestern AL. Strong ascent and
intense low-level shear from a 60-70 kt low-level jet should
continue to focus a nearly optimal supercell/tornado environment
over this area through this evening.