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Day 1 Convective Outlook issued at 1610 UTC
SPC AC 212003
   
   DAY 1 CONVECTIVE OUTLOOK  
   NWS STORM PREDICTION CENTER NORMAN OK
   0303 PM CDT FRI APR 21 2006
   
   VALID 212000Z - 221200Z
   
   ...THERE IS A SLGT RISK OF SVR TSTMS ACROSS PARTS OF THE CENTRAL
   GULF COAST/TN VALLEY REGION...
   
   ...CENTRAL GULF COAST REGION INTO THE TN VALLEY...
   MODERATE INSTABILITY IS INDICATED ACROSS THE CENTRAL GULF COAST
   REGION AND INTO TN THIS AFTERNOON...AHEAD OF VIGOROUS MID-LEVEL VORT
   MAX NOW MOVING NEWD ACROSS SERN LA/MS. WITH RELATIVELY STRONG SWLY
   MID-LEVEL JET STREAK ON SERN PERIPHERY OF THIS FEATURE...SUFFICIENT
   SHEAR EXISTS TO SUPPORT A CONTINUED THREAT ORGANIZED/SUPERCELL
   STORMS.  STRONGEST STORMS ATTM EXIST FROM SRN MS NEWD INTO SERN
   TN...AND THIS CORRIDOR SHOULD REMAIN THE MOST FAVORABLE ZONE FOR
   LOCALLY-DAMAGING WINDS AND HAIL THROUGH THIS AFTERNOON.  THOUGH
   SEVERE THREAT MAY EXTEND EWD ACROSS GA LATER THIS EVENING...OVERALL
   THREAT SHOULD DIMINISH SLOWLY AFTER SUNSET.
   
   ...FL...
   MODERATE INSTABILITY BUT WEAK SHEAR IS INDICATED ACROSS THE FL
   PENINSULA...WHICH WILL CONTINUE TO SUPPORT THE DEVELOPMENT OF
   ISOLATED VIGOROUS/PULSE-TYPE SEVERE STORMS THIS AFTERNOON. 
   ACCOMPANYING THREAT FOR HAIL/LOCALLY DAMAGING WINDS SHOULD DIMINISH
   THIS EVENING WITH THE LOSS OF DAYTIME HEATING.
   
   ...CENTRAL CA...
   COOLING ALOFT ASSOCIATED WITH APPROACHING UPPER TROUGH WILL CONTINUE
   TO STEEPEN LAPSE RATES ACROSS CENTRAL CA THROUGH THE PERIOD.  THIS
   COMBINED WITH DAYTIME HEATING AND DEWPOINTS IN THE 50S IN THE
   CENTRAL VALLEY MAY YIELD INSTABILITY SUFFICIENT FOR A FEW STRONGER
   STORMS -- POSSIBLY CAPABLE OF PRODUCING ISOLATED/MARGINALLY-SEVERE
   HAIL.
   
   ..GOSS.. 04/21/2006
   
   CLICK TO GET WUUS01 PTSDY1 PRODUCT

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


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