SPC AC 122249
   
   DAY 1 CONVECTIVE OUTLOOK AMEND 1
   NWS STORM PREDICTION CENTER NORMAN OK
   0549 PM CDT TUE APR 12 2005
   
   VALID 122245Z - 131200Z
   
   THERE IS A SLGT RISK OF SVR TSTMS TO THE RIGHT OF A LINE FROM 20 S
   CHS 30 S AGS 25 ENE MCN 40 SSE ATL 15 SW ATL 30 SE RMG 15 WNW RMG 40
   SW CHA 20 SSW CKV 15 SSW CGI 20 WNW STL 45 SE IRK 40 WSW BRL 20 WNW
   PIA 25 NNE CMI 15 NNW SDF 50 SSW LEX 35 SW LOZ 35 NNW TYS 40 SSE TYS
   35 WSW AVL 10 E AVL 15 NNE CLT 45 W SOP 10 S SOP 15 ENE ILM.
   
   GEN TSTMS ARE FCST TO THE RIGHT OF A LINE FROM 20 N PBI 25 SSE FMY.
   
   GEN TSTMS ARE FCST TO THE RIGHT OF A LINE FROM 10 WSW PNS 10 SE HSV
   35 NNE MSL 35 WSW MKL 30 SE UNO 25 SW SZL 20 SSW LWD 30 NNE DSM 25
   WSW DBQ 35 ENE LAF 15 NNW HTS 10 NNE BLF 35 S PSK 10 NE RDU 20 NNE
   HSE.
   
   GEN TSTMS ARE FCST TO THE RIGHT OF A LINE FROM 30 NNE HVR 3HT 40 NNW
   WEY 45 NNE SUN 20 NW BOI 50 E 4LW 15 SE MHS EKA.
   
   ...THERE IS A SLGT RISK OF SVR TSTMS FROM ERN MO AND IL...SEWD INTO
   NRN GA AND MUCH OF SC/SRN NC...
   
   AMENDED TO ADD A SLIGHT RISK TO PORTIONS OF GA INTO SC/SRN NC
   
   ...PORTIONS OF GA INTO SC/SRN NC...
   THUNDERSTORMS WILL CONTINUE TO DEVELOP THIS EVENING ACROSS PORTIONS
   OF ERN GA INTO MUCH OF SC AND POTENTIALLY MOVE INTO SRN NC AHEAD OF
   UPPER TROUGH MOVING INTO TN.  PRIMARY THREATS WILL BE LARGE HAIL/
   DAMAGING WINDS WITH THE STRONGEST ACTIVITY.  HOWEVER...AN ISOLATED
   TORNADO OR TWO WILL BE POSSIBLE ACROSS PORTIONS OF SC ALONG A
   STATIONARY FRONT WHERE BACKED LOW LEVEL WINDS WILL LOCALLY ENHANCE
   LOW LEVEL SHEAR.  FOR ADDITIONAL MESOSCALE DETAILS...PLEASE REFER TO
   SWOMCD 157.
   
   
   ...PREVIOUS DISCUSSION FROM 20Z...
   
   ...LOWER OH/TN VALLEY...
   
   NUMEROUS THUNDERSTORM CLUSTERS HAVE EVOLVED OVER IL ALONG ERN EDGE
   OF COLD UPPER LOW...CENTERED JUST SW OF STL.  EARLIER AXIS OF
   MODERATE INSTABILITY IS SLOWLY OVERTURNING DUE TO THE EXPANDING
   PRECIPITATION/CLOUDINESS.  WITH TIME THIS SHOULD PROVE DETRIMENTAL
   TO UPDRAFT HEALTH AND A SLOW DECREASE IN INTENSITY SHOULD BE
   OBSERVED BY LATE AFTERNOON.  IT APPEARS WITH TIME STRONGEST STORMS
   MAY DEVELOP TO THE SOUTHEAST ACROSS PORTIONS OF KY INTO MIDDLE TN BY
   13/00Z WHERE STRONGEST HEATING AND STEEPER LAPSE RATES ARE NOW
   OBSERVED.  LATEST SATELLITE IMAGERY SUPPORTS A SLOW UPWARD EVOLUTION
   OF CONVECTION ALONG LEADING EDGE OF DRY SLOT FROM NEAR OWB TO SOUTH
   OF BNA. AS UPPER LOW REDEVELOPS SEWD INTO THIS REGION LARGE SCALE
   SUPPORT WILL ENHANCE OVERALL CONVECTIVE THREAT.  LARGE HAIL SHOULD
   BE THE PRIMARY SEVERE THREAT WITH MOST STORMS THIS AFTERNOON.
   
   FARTHER SOUTH...DEEP CONVECTION MAY STRUGGLE TO DEVELOP OVER
   PORTIONS OF SERN AL INTO CNTRL GA WHERE EXTENSIVE CLOUD COVER AND
   WEAK LOW LEVEL CONVERGENCE WILL LIMIT ACTIVITY.  HOWEVER...
   THUNDERSTORMS ARE DEVELOPING ALONG WRN EDGE OF WEDGE FRONT OVER NERN
   GA AND THIS BOUNDARY MAY SERVE TO FOCUS CONVECTION FOR THE NEXT
   SEVERAL HOURS. AGAIN...HAIL WOULD BE THE PRIMARY THREAT WITH THIS
   ACTIVITY.
   
   ..PETERS.. 04/12/2005
   
   ...NOTICE...
   THE STATION RELATIVE POINTS IN THIS PRODUCT ARE NOW AVAILABLE
   SEPARATELY UNDER THE WMO HEADINGS WUUS01 PTSDY1...
   WUUS02 PTSDY2...WUUS03 PTSDY3.  THE INCLUSION OF POINTS
   IN THIS DISCUSSION WILL BE DISCONTINUED AFTER THE 2005
   CONVECTIVE SEASON.  A PUBLIC NOTIFICATION STATEMENT (PNS)
   WILL PROVIDE DETAILS ON THE TRANSITION.
   
   CLICK TO GET WUUS01 PTSDY1 PRODUCT

   NOTE: THE NEXT DAY 1 OUTLOOK IS SCHEDULED BY 0100Z