|Mesoscale Discussion 149|
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Mesoscale Discussion 0149
NWS Storm Prediction Center Norman OK
0659 PM CDT Mon Mar 19 2018
Areas affected...North central and northeast AL
Concerning...Tornado Watch 13...
Valid 192359Z - 200130Z
The severe weather threat for Tornado Watch 13 continues.
SUMMARY...Cluster of supercells will continue to pose a threat for
tornadoes, large hail, and damaging winds for the next few hours
along the warm front in north central and northeast AL.
DISCUSSION...A cluster of supercells continues to move
east-southeastward across north central AL this evening. Thus far,
the more intense storms have tended to be the lead cells in the
cluster, though interactions with upstream convection have
interfered with more classic supercell structures. Recent discrete
development south of the cluster will lead to additional cell
mergers and a continued messy convective mode. Still, the
storm-scale environment is favorable for tornadic supercells along
the surface warm front in AL, which represents the southern edge of
the stronger low-level shear/hodograph curvature and the northern
edge of the more unstable warm sector.
...Please see www.spc.noaa.gov for graphic product...
LAT...LON 34478661 34418601 34228568 34048544 33528540 33508584
33938681 34128712 34298698 34398684 34478661
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