Heads Up Hill Country - May 21, 2013 - Be Safe
May 21, 2013: 11:42 a.m.; National Weather Service
... Extremely unstable airmass poised to erupt in severe thunderstorms
with large hail and damaging winds by late afternoon through this
evening...
Rich low level Gulf moisture coupled with daytime heating and
cold air aloft will result in an extremely unstable air mass
across south central Texas from late this morning through early
evening. Thunderstorm development is expected beginning by early
this afternoon as an an upper level trough and cold front approach
from the west. Scattered thunderstorms will develop rapidly by
late afternoon... quickly becoming severe as the front encounters
this unstable air mass. The main threats will be from large hail
and damaging thunderstorm winds... however with the extreme
instability present... isolated tornadoes cannot be ruled out. Much
of the eastern half of south central Texas... mainly east of a
Kerrville to Carrizo Springs line... will be affected from late
afternoon until the early morning hours Wednesday. In
addition... rainfall amounts may average 1 to 3 inches within the
heaviest storms producing some localized flooding.
Heightened concern exists along and north of a Burnet to Austin to
Giddings line this evening... where the most unstable conditions will
reside. This area will be most at risk for very large hail and
isolated tornadoes.
The weather system should exit the region by early Wednesday
morning... with heavy rains and severe weather concerns moving east
of the region.
Listen to NOAA Weather Radio or your local media for later updates
on this severe weather event. Also... go to weather.Gov/Austin for
the latest information... forecasts and warnings.
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