Mesoscale Discussion 0364
NWS Storm Prediction Center Norman OK
0527 PM CDT Sun Apr 12 2020
Areas affected...southeastern Louisiana and far southern Mississippi
Concerning...Tornado Watch 107...
Valid 122227Z - 122330Z
The severe weather threat for Tornado Watch 107 continues.
SUMMARY...Cells developing near Ascension, Livingston, and
Assumption Parishes are expected to become supercellular and
potentially tornadic over time.
DISCUSSION...Radar/satellite imagery indicates continued robust
growth in convection across Ascension, Livingston, and Assumption
Parishes in southeastern Louisiana. These storms have successfully
breached the cap and are exhibiting cellular storm mode in an
environment characterized by strong low-level shear (40 kt 0-1km),
strong deep shear (60-65 kt 0-6km) and moderate to strong
instability (2000+ MLCAPE) amidst 70-75F dewpoints and near 7 deg C
lapse rates aloft.
Given the environment, the storms are expected to acquire rotation
and eventually pose a risk of all hazards, including strong
tornadoes.
..Cook/Hart.. 04/12/2020
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...JAN...LIX...LCH...