SPC AC 081640

   DAY 2 CONVECTIVE OUTLOOK  
   NWS STORM PREDICTION CENTER NORMAN OK
   1140 AM CDT TUE APR 08 2014

   VALID 091200Z - 101200Z

   ...NO SVR TSTM AREAS FORECAST...

   ...SYNOPSIS...

   HIGH AMPLITUDE UPPER TROUGH NOW OVER THE ERN U.S. WILL FINALLY EXIT
   THE ATLANTIC SEABOARD WEDNESDAY NIGHT. NWLY FLOW ALOFT WILL PREVAIL
   UPSTREAM ACROSS THE REMAINDER OF THE COUNTRY. SHORTWAVE TROUGH NOW
   APPROACHING BRITISH COLUMBIA CANADA WILL CREST AN UPPER RIDGE AND
   DROP SEWD THROUGH THE NRN PLAINS AND UPPER MS VALLEY LATE WEDNESDAY
   AFTERNOON AND EVENING. A COLD FRONT WILL ACCOMPANY THIS FEATURE AND
   SHOULD ADVANCE TO THE UPPER GREAT LAKES SWWD INTO KS BY THE END OF
   THIS PERIOD.  

   ...NRN PLAINS THROUGH UPPER MS VALLEY REGION...

   MEAGER LOW-LEVEL MOISTURE WITH UPPER 30S TO LOW 40S DEWPOINTS WILL
   RESIDE IN PRE-FRONTAL WARM SECTOR...BUT STEEP MID-LEVEL LAPSE RATES
   WILL DEVELOP ACROSS THIS REGION ALONG WITH A DESTABILIZING NEAR SFC
   LAYER. THESE FACTORS AND INCREASING MID-LEVEL ASCENT ACCOMPANYING
   THE PROGRESSIVE NRN STREAM SHORTWAVE TROUGH SHOULD CONTRIBUTE TO
   300-500 J/KG MLCAPE DURING THE AFTERNOON. HIGH BASED STORMS ARE
   EXPECTED TO INITIATE ALONG AND AHEAD OF THE FRONT AS THE ATMOSPHERE
   DESTABILIZES. INVERTED-V BOUNDARY LAYERS AND STRENGTHENING WLY
   UNIDIRECTIONAL DEEP LAYER WINDS WILL SUPPORT A THREAT OF ISOLATED
   STRONG TO DAMAGING WIND GUSTS. SMALL HAIL MAY ALSO ACCOMPANY THE
   STRONGER STORMS. DUE TO LIMITED MOISTURE AND INSTABILITY...OVERALL
   THREAT DOES NOT APPEAR TO WARRANT MORE THAN 5% SEVERE PROBABILITIES
   AT THIS TIME.  

   ...CAROLINAS...

   DESPITE LIMITED LOW-LEVEL MOISTURE...COLD AIR ALOFT WITHIN THERMAL
   TROUGH ALONG WITH DIABATIC WARMING WILL CONTRIBUTE TO SUFFICIENTLY
   STEEP LAPSE RATES AND INSTABILITY FOR A THREAT OF WIDELY SCATTERED
   THUNDERSTORMS DURING THE AFTERNOON.

   ..DIAL.. 04/08/2014

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   NOTE: THE NEXT DAY 2 OUTLOOK IS SCHEDULED BY 0600Z