Upper level energy swinging out of the Southwest combined with return flow
from the western Gulf will spread precipitation across the south central
U.S. Wednesday into Thursday. Rumbles of thunder will be possible across
Texas while a mix of snow, sleet and freezing rain is expected within
the northern edge of the precipitation shield stretching across the
Central Plains and Middle Mississippi Valley. Upstream, a second source
of energy aloft will cross northern Mexico and is expected to ignite an
area of heavy rains and thunderstorms ...