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Mesoscale Discussion 355
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MD 355 graphic

   Mesoscale Discussion 0355
   NWS Storm Prediction Center Norman OK
   0140 PM CDT Sun Apr 12 2020

   Areas affected...Portions of central MS

   Concerning...Tornado Watch 106...

   Valid 121840Z - 122015Z

   The severe weather threat for Tornado Watch 106 continues.

   SUMMARY...Severe potential should be maximized across parts of
   central MS this afternoon. This continues to include the possibility
   of strong tornadoes.

   DISCUSSION...A small cluster moving into central MS may be
   transitioning to a supercell, with echo tops approaching 50,000 ft.
   Yet another TDS has recently been observed with this convection in
   Yazoo County, MS. The airmass downstream of this activity remains
   quite favorable for organized, severe convection. The 18Z sounding
   from JAN shows a very strong and veered wind profile in the low
   levels in association with a 60-70+ kt low-level jet. The low-level
   inversion observed around 850 mb is expected to continue eroding as
   ascent associated with both the low-level jet and an approaching
   mid-level trough overspread this region.

   A meso-low has also been observed from 18Z surface analysis over far
   southeastern AR and northwestern MS. Surface winds are locally
   backed to east-southeasterly along a marine warm front extending
   eastward from this low across parts of northern/central MS. A
   relatively confined corridor of greater severe potential is apparent
   this afternoon across parts of central MS, generally to the east of
   the ongoing cluster/supercell and south of the northward-advancing
   warm front. Across this area, a sufficiently unstable airmass
   coupled with very strong low and mid-level shear will continue to
   support the potential for tornadoes with any storms that can form/be
   sustained. Some of these tornadoes could be strong given the ample
   low-level shear. A threat for damaging winds and perhaps some large
   hail also exists.

   ..Gleason.. 04/12/2020

   ...Please see www.spc.noaa.gov for graphic product...

   ATTN...WFO...JAN...

   LAT...LON   32909063 33349014 33498949 33428848 32818848 32408855
               32258931 31999098 32909063 

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Page last modified: April 12, 2020
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