Here comes east TX
Posted by JAC on 12/23/2009, 2:16 pm
Like you said, a lot better dynamics here.

I like the lapse-rate gradient - could get a nice squall line going in a few hours.

Some how I can't link the image from SPC.

I'll see if I can try later.






MESOSCALE DISCUSSION 2271
  NWS STORM PREDICTION CENTER NORMAN OK
  0103 PM CST WED DEC 23 2009
 
  AREAS AFFECTED...PARTS OF EAST TX AND SERN OK
 
  CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE
 
  VALID 231903Z - 232000Z
 
  WW ISSUANCE IS BEING CONSIDERED FOR PARTS OF E TX AND SERN OK.
 
  REGIONAL RADARS INDICATED A CORRIDOR OF DISCRETE TSTMS INCREASING IN
  COVERAGE FROM N/NW OF VCT/HOU THROUGH MUCH OF ERN TX TO THE ARKLATEX
  REGION.  THIS ACTIVITY IS DEVELOPING WITHIN A ZONE OF LOW LEVEL
  CONVERGENCE WHERE THE BOUNDARY LAYER HAS CONTINUED TO WARM AND
  MOISTEN TODAY...WITH FURTHER DESTABILIZATION EXPECTED.  WEAK MID
  LEVEL LAPSE RATES CURRENTLY LOCATED OVER THIS REGION ARE TENDING TO
  LIMIT THE DEGREE OF DESTABILIZATION WITH MLCAPE RANGING FROM
  500-1000 J/KG/.  HOWEVER...THIS INSTABILITY COMBINED WITH EFFECTIVE
  BULK SHEAR 35-45 KT /STRONGER SHEAR OVER NERN TX/ SUGGESTS A FEW
  SUSTAINED STORMS WILL BE CAPABLE OF EVOLVING INTO SUPERCELLS.
  ALTHOUGH THIS ACTIVITY IS SHOWING SIGNS OF GRADUAL INCREASE...WITH
  MORE PERSISTENT ACTIVITY LOCATED OVER NERN TX WHERE SHEAR IS
  STRONGER...THE OVERALL COVERAGE AREA WILL REMAIN INTACT WITH FURTHER
  INCREASE IN INTENSITY LATER THIS AFTERNOON/EVENING AS UPPER TROUGH
  APPROACHES FROM THE WEST.
 
  ..PETERS.. 12/23/2009
 


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Big Storm for Central CONUS - JAC, 12/23/2009, 7:48 am
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