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Severe Weather Outbreak April 10-12th Disc./Obs.


WilkesboroDude

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MESOSCALE DISCUSSION 0445

   NWS STORM PREDICTION CENTER NORMAN OK

   0221 PM CDT THU APR 11 2013

  

   AREAS AFFECTED...CNTRL THROUGH NRN AL INTO EXTREME SRN MIDDLE TN

  

   CONCERNING...TORNADO WATCH 96...

  

   VALID 111921Z - 112045Z

  

   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 96 CONTINUES.

  

   SUMMARY...THREAT FOR TORNADOES AND DAMAGING WIND WILL PERSIST

   THROUGH THE AFTERNOON ACROSS REMAINING PARTS OF TORNADO WATCH 96

   INCLUDING CNTRL THROUGH NRN AL AND EXTREME SRN MIDDLE TN. SOME

   ADDITIONAL COUNTIES ALONG THE SERN PERIPHERY OF WW 96 INCLUDING

   SCNTRL AND ECNTRL AL MIGHT NEED TO BE ADDED INTO CURRENT WW.

  

   DISCUSSION...EXPANSIVE SQUALL LINE FROM MIDDLE TN SWWD THROUGH NWRN

   AL INTO SERN MS IS MOVING EAST AT AROUND 20-25 KT. STORMS HAVE

   STRENGTHENED AS THEY INTERCEPT THE DESTABILIZING BOUNDARY LAYER

   ALONG MOIST AXIS WHERE UPPER 60S DEWPOINTS AND DIABATIC WARMING HAVE

   CONTRIBUTED TO MLCAPE FROM 1000-1500 J/KG. A 50 KT LLJ WILL BE

   MAINTAINED WITHIN ENTRANCE REGION OF UPPER JET ROTATING NEWD ALONG

   SERN PERIPHERY OF THE PROGRESSIVE UPPER TROUGH. CURRENT VWP DATA

   FROM BIRMINGHAM SHOW LARGE 0-2 KM HODOGRAPHS AND 60 KT EFFECTIVE

   SHEAR. THE SUPERCELL THAT HAS A HISTORY OF TORNADOES HAS BEEN

   ABSORBED INTO THE LINE OVER FAYETTE COUNTY IN NWRN AL. OTHER

   ORGANIZED STORM STRUCTURES REMAIN LIKELY AS THE LINE CONTINUES EAST.

  

  

   SPECIAL 18Z RAOB FROM BIRMINGHAM COMPARED TO 12Z INDICATES COOLING

   AND MOISTENING IN THE MID-LEVEL CAPPING LAYER AND APPEARS TO HAVE

   BEEN ACTED UPON BY ASCENT AHEAD OF THE UPPER TROUGH. THIS SUGGESTS

   THE MORE DISCRETE CONVECTION DEVELOPING WITHIN THE WARM SECTOR AHEAD

   OF THE LINE MIGHT EVENTUALLY DEEPEN AND EVOLVE INTO

   SUPERCELLS...WHICH WOULD AUGMENT THE TORNADO THREAT. IF THESE STORMS

   BEGIN TO SHOW EVIDENCE OF DEEPENING...ADDITIONAL COUNTIES ALONG THE

   SERN PERIPHERY OF WW 96 MAY NEED TO BE ADDED.

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30 minutes later, it's finally got a SVR warning on it - but why isn't this a TOR warning?

 

I think that NWS Birmingham is thinking its a book end vortex mesocyclone. Which I think is the right call. There hasn't been any damage reports out of it.

 

Edit: Personally I'm watching the pre-frontal convection coming towards Talladega. Though at the moment is looks like there's too many riders in the pack, nobody is getting out front into the clean air.

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One storm to potentially watch is near the AL/GA border

close to Interstate 20.

 

That one does look like it has or will have the greatest potential right now.  Been out of the severe weather loop on this one, just had our second baby girl on Tuesday!  Anyway, hope to get back in the swing of things but no time to fire up the GR3 right now.  Some other discrete cells popping over in eastern Georgia south of Augusta.  Folks wrapping up the first round over there need to keep an eye to the sky.

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That one does look like it has or will have the greatest potential right now.  Been out of the severe weather loop on this one, just had our second baby girl on Tuesday!  Anyway, hope to get back in the swing of things but no time to fire up the GR3 right now.  Some other discrete cells popping over in eastern Georgia south of Augusta.  Folks wrapping up the first round over there need to keep an eye to the sky.

Congrats on the new addition. Me and my wife are talking about a second one too.

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Congrats Audioguy and Mrs Audioguy!! :hug: 

 

 

:weight_lift:

 

 

 

THE NATIONAL WEATHER SERVICE IN COLUMBIA HAS ISSUED A
 
 
 
* SEVERE THUNDERSTORM WARNING FOR...
 
  SOUTHEASTERN LEXINGTON COUNTY IN CENTRAL SOUTH CAROLINA
 
  SOUTHERN RICHLAND COUNTY IN CENTRAL SOUTH CAROLINA
 
  EASTERN AIKEN COUNTY IN CENTRAL SOUTH CAROLINA
 
  NORTHWESTERN CALHOUN COUNTY IN CENTRAL SOUTH CAROLINA
 
  NORTHWESTERN ORANGEBURG COUNTY IN CENTRAL SOUTH CAROLINA
 
 
 
* UNTIL 645 PM EDT
 
 
 
* AT 602 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
 
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
 
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 22
 
  MILES SOUTHWEST OF GASTON...OR 16 MILES NORTHWEST OF DENMARK.
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