|Mesoscale Discussion 114|
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Mesoscale Discussion 0114
NWS Storm Prediction Center Norman OK
1231 PM CST Sun Jan 22 2017
Areas affected...Portions of east-central AL and west-central GA
Concerning...Tornado Watch 21...
Valid 221831Z - 221930Z
The severe weather threat for Tornado Watch 21 continues.
SUMMARY...A cluster of intense storms will spread across portions of
east-central AL into west-central GA through mid-afternoon.
DISCUSSION...A cluster of thunderstorms spreading eastward and
northeastward across portions of central AL is exhibiting forward
motion around 35-45 kt, with linear extrapolation suggesting its
leading edge crossing into GA around 2030-2200Z. This activity is
evolving within a region of strong deep ascent associated with the
left-exit region of a midlevel speed maximum. While this activity
lies to the north of the most unstable air presently confined to
southern AL/GA, the 18Z Birmingham sounding indicates sufficient
buoyancy amidst around 60-70 kt of deep shear for a continued severe
risk with this activity. Damaging winds and tornadoes will be
possible, especially owing to rapid intensification of the surface
low in proximity to the area.
LAT...LON 32178638 32768638 33118546 33088466 32758455 32188458
31888531 31868612 32178638
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