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April 12 Severe Event


joshwx2003
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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...

mcd0364.gif

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5 minutes ago, Snowstorm920 said:

Latest HRRR run is pretty concerning. It shows a string of pearl supercells forming and sweeping east across the SE tonight

Its also about 45 minutes too slow.  I think this line may be in ATL by 0430-0500Z.  The 3km NAM is laughably slow.  The HRRR is closest but even its too far west now with activity in NRN AL

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ASPER MS-  
543 PM CDT SUN APR 12 2020  
  
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 600 PM CDT FOR  
SOUTHWESTERN JASPER COUNTY...  
          
AT 543 PM CDT, A CONFIRMED TORNADO WAS LOCATED OVER STRINGER, MOVING  
NORTHEAST AT 50 MPH.  
  
HAZARD...DAMAGING TORNADO.  
  

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BULLETIN - EAS ACTIVATION REQUESTED  
TORNADO WARNING  
NATIONAL WEATHER SERVICE JACKSON MS  
545 PM CDT SUN APR 12 2020  
  
THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A  
  
* TORNADO WARNING FOR...  
  EASTERN KEMPER COUNTY IN EAST CENTRAL MISSISSIPPI...  
  CENTRAL LAUDERDALE COUNTY IN EAST CENTRAL MISSISSIPPI...  
  
* UNTIL 645 PM CDT.  
          
* AT 545 PM CDT, A CONFIRMED TORNADO WAS LOCATED NEAR SABLE, OR 9  
  MILES SOUTH OF MERIDIAN, MOVING NORTHEAST AT 50 MPH.  
  
  HAZARD...DAMAGING TORNADO.  
  
  SOURCE...RADAR CONFIRMED TORNADO.  

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EVERE WEATHER STATEMENT  
NATIONAL WEATHER SERVICE BIRMINGHAM AL  
555 PM CDT SUN APR 12 2020  
  
ALC009-122315-  
/O.CON.KBMX.TO.W.0026.000000T0000Z-200412T2315Z/  
BLOUNT AL-  
555 PM CDT SUN APR 12 2020  
  
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 615 PM CDT FOR  
SOUTHEASTERN BLOUNT COUNTY...  
          
AT 554 PM CDT, A CONFIRMED TORNADO WAS LOCATED OVER ONEONTA, MOVING  
NORTHEAST AT 55 MPH.  
  
HAZARD...DAMAGING TORNADO.  
  
SOURCE...RADAR CONFIRMED TORNADO.  

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