Firing up in East OK
Posted by JAC on 12/23/2009, 1:56 pm






MESOSCALE DISCUSSION 2269
  NWS STORM PREDICTION CENTER NORMAN OK
  1218 PM CST WED DEC 23 2009
 
  AREAS AFFECTED...PORTIONS OF ERN OK TO FAR NORTH CENTRAL TX
 
  CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE
 
  VALID 231818Z - 231915Z
 
  WW MAY BE NEEDED FOR PORTIONS OF ERN/SRN OK TO FAR NRN TX THIS
  AFTERNOON.  ALTHOUGH A FEW STRONGER STORMS MAY DEVELOP /SOME
  EXCEEDING SEVERE LEVELS/ THIS AFTERNOON...UNCERTAINTY IN OVERALL
  COVERAGE CONTINUES TO PRECLUDE THE PRESENT ISSUANCE OF A WW.
 
  LATE MORNING SURFACE ANALYSIS INDICATED A BOUNDARY EXTENDING FROM AN
  AREA OF LOW PRESSURE IN SERN KS SSWWD THROUGH CENTRAL OK/N TX TO
  WEST CENTRAL TX.  SLY LOW LEVEL FLOW HAS ALLOWED A RECENT NNWWD
  SHIFT OF A PORTION OF THIS BOUNDARY ACROSS PARTS OF CENTRAL/SRN OK.
  WATER VAPOR IMAGERY INDICATED A SHORTWAVE TROUGH MOVING NEWD THROUGH
  SRN KS/CENTRAL OK.  FORCING FOR ASCENT ALONG THE SRN EXTENT OF THIS
  IMPULSE APPEARS TO BE AIDING RECENT TSTM DEVELOPMENT ALONG THE
  BOUNDARY IN SRN OK /JOHNSTON-ERN LOVE COUNTIES/...WITH THIS ACTIVITY
  EITHER SURFACE BASED OR NEAR-SURFACE BASED.  ALTHOUGH VEERED SURFACE
  WINDS WILL REDUCE LOW LEVEL HODOGRAPH CURVATURE... ADDITIONAL
  SURFACE HEATING AIDING IN FURTHER DESTABILIZATION COMBINED WITH
  STRONGER DEEP LAYER SHEAR SUGGEST ANY SUSTAINED STORMS MAY SUPPORT
  ISOLATED HAIL AND/OR STRONG WIND GUSTS.
 
  ..PETERS.. 12/23/2009
 
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Big Storm for Central CONUS - JAC, 12/23/2009, 7:48 am
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