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January 12th 2023 Enhanced Severe Threat


kayman
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Mesoscale Discussion concerning Metro Atlanta 

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Mesoscale Discussion 52
< Previous MD
MD 52 graphic

 

Mesoscale Discussion 0052

   NWS Storm Prediction Center Norman OK

   1052 AM CST Thu Jan 12 2023

 

   Areas affected...east central Alabama and western Georgia

 

   Concerning...Severe potential...Tornado Watch likely 

 

   Valid 121652Z - 121745Z

 

   Probability of Watch Issuance...80 percent

 

   SUMMARY...Tornado threat continues along the eastern advancing line

   of storms which is expected to move into east central

   Alabama/Georgia later today.

 

   DISCUSSION...A line of thunderstorms continues to advance eastward

   through northern Alabama. Within this line, transient circulations

   have been noted on radar. Ahead of this line, the KMXX (Maxwell Air

   Force Base) VAD profile depicts 0-1 km storm relative helicity

   around 150-200 m2/s2. 15z RAOB from BMX indicates upstream 0-1km SRH

   around 300 m2/s2. The wind field over eastern Alabama/Georgia is

   expected to increase through the afternoon as flow aloft increases

   in the next few hours. RAP analysis shows 850 mb winds increasing to

   around 45-50 kts by 19-20z. Surface objective analysis indicates

   surface based CAPE around 1000-1500 j/kg across this region and the

   convective inhibition is reduced. This environment will continue to

   be conducive to tornado development within the line of storms, with

   the threat gradually spreading east through the afternoon. A Tornado

   Watch downstream of WW17 will likely be needed for portions of

   eastern Alabama and western Georgia this afternoon.

 

   ..Thornton/Guyer.. 01/12/2023

 

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

 

   ATTN...WFO...FFC...BMX...

 

   LAT...LON 32228624 32468645 32848643 33418613 33928581 34258553

               34608500 34648467 34618443 34608431 34468395 33988408

               33708415 33468428 33308438 33058449 32698472 32508486

               32178529 32108566 32118601 32228624 

 

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The new Shelby County/Talladega County storm near Vincent, AL has a Svr. T'Storm Warning. However it's showing signs again rotation. It's a QLCS looking storm. It's the storm cluster that did produce the confirmed tornadoes near Duncanville, AL.

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