...Southeast through 12Z Thursday...
A mature QLCS is poised to track across far southeast MS into
central and southern AL and the western half of the FL Panhandle
this evening into the rest of tonight. The Gulf Coastal area is
beneath the entrance region of the strong southerly low-level jet
and exit region of both the westerly 500 and 300 mb jet streaks,
which are contributing to long, curved hodographs and 400+ m2/s2 of
0-1km SRH. Near 70F surface dewpoints are located along the Gulf
Coast, and this richer moisture is expected to advect northward
towards central AL through the night, contributing to modest
buoyancy (i.e. up to 1000 J/kg MLCAPE). As such, damaging gust and
tornado potential is expected to continue across central and
southern AL into the western FL Panhandle through the night. There
are still some indications by the latest high-resolution guidance
that portions of the QLCS may break down into a semi-discrete,
cellular mode. If this occurs, supercell structures may develop and
support a heightened threat of strong tornadoes given the magnitude
of low-level shear available.