|Mesoscale Discussion 357|
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Mesoscale Discussion 0357
NWS Storm Prediction Center Norman OK
0338 PM CDT Sun Apr 12 2020
Areas affected...Portions of southern/central MS into west-central
Concerning...Tornado Watch 106...107...109...
Valid 122038Z - 122215Z
The severe weather threat for Tornado Watch 106, 107, 109 continues.
SUMMARY...The potential for damaging winds, large hail, and
tornadoes will continue across parts of southern/central MS into
west-central AL for the next couple of hours. Strong tornadoes still
DISCUSSION...Recent 7 and 9 km CAPPI radar imagery suggests that the
storms across southern/central MS have intensified. It appears that
the low-level inversion present on the 18Z JAN sounding that may
have been hampering robust updraft development has eroded. A surface
warm front has continued to lift northward across parts of central
into northern AL, with a moderately to strongly unstable airmass
present to its south across parts of southern/central MS into AL.
The greatest near-term tornado potential appears to be with a
supercell currently in Noxubee County MS, and continuing downstream
into west-central AL. Low-level flow is backed to southeasterly
along the warm front across this area, with latest mesoanalysis
estimating effective SRH now exceeds 500 m2/s2. A strong tornado may
occur with this supercell given the very strong low-level shear in
the presence of a supercell. Otherwise, all severe hazards remain
possible for the next couple of hours along and downstream of
ongoing convection across southern/central MS. Another strong
tornado also appears possible with a supercell moving from Pike into
Walthall County in southern MS.
...Please see www.spc.noaa.gov for graphic product...
LAT...LON 31039058 31979085 32798972 32998912 33388863 34008825
33998738 33648713 33258699 32178867 31188962 31039058
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