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      Portions of Alabama upgraded to High Risk

      DAY 1 CONVECTIVE OUTLOOK NWS STORM PREDICTION CENTER NORMAN OK0219 PM CDT MON APR 28 2014 VALID 282000Z - 291200Z...THERE IS A HIGH RISK OF SVR TSTMS ACROSS PORTIONSOF MS...AL... ...THERE IS A MDT RISK OF SVR TSTMSSURROUNDING THE HIGH RISK AREA ACROSS PORTIONS OFLA...MS...AL...TN... ...THERE IS A SLGT RISK OFSVR TSTMS ELSEWHERE ACROSS A LARGE AREA FROM THELOWER/MID MS VALLEY EWD TO THE SRN APPALACHIANS ANDCAROLINAS... ...SUMMARY... A SEVERE WEATHEROUTBREAK WILL CONTINUE THROUGH TONIGHT FROM PARTSOF THE LOWER MISSISSIPPI VALLEY INTO THE TENNESSEEVALLEY AND CENTRAL GULF COAST STATES. NUMEROUSTORNADOES ARE EXPECTED...SOME OF WHICH COULD BEINTENSE. VERY LARGE HAIL AND DAMAGING STRAIGHTLINE WINDS ARE ALSO LIKELY. ...PRIMARY CHANGESTO THE DAY 1 CONVECTIVE OUTLOOK.../1/ AREAS FROM CNTRL MS TO NWRN AL HAVE BEENUPGRADED TO HIGH RISK FOR A TORNADO OUTBREAK.SEMI-DISCRETE/DISCRETE SUPERCELLS ARE EVOLVINGALONG A PRE-FRONTAL CONFLUENCE AXIS STRETCHINGFROM N-CNTRL MS TO W-CNTRL MS. ADDITIONAL CONVECTIONSHOULD FORM FARTHER S WITH DIURNAL HEATING...WITHALL OF THIS ACTIVITY PROGRESSING EWD ACROSS PARTSOF MS INTO WRN AL. WITH WARM/MOIST BOUNDARY-LAYERCONDITIONS SUPPORTING MLCAPE AROUND 2000-2500 J/KGAMIDST 200-400 M2/S2 OF EFFECTIVE SRH...AND GIVENTHE PRESENCE OF SEPARATED/ROTATING UPDRAFTS...CONFIDENCEHAS INCREASED IN GREATER COVERAGE OF TORNADOESWARRANTING THE HIGH RISK UPGRADE. SIGNIFICANT TORNADOESARE EXPECTED./2/ MINOR ADJUSTMENTS HAVE TO THE MODERATERISK TO INCLUDE MORE OF NERN LA...SRN MS...AND WRN/CNTRLAL TO ACCOUNT FOR HIGHER SEVERE THUNDERSTORM/TORNADOPOTENTIAL WITH CONVECTION DEVELOPING ALONG THEFRONT/DRYLINE OVER THE SABINE VALLEY...WITH THEGREATER SVR RISK SPREADING EWD ACROSS AL TONIGHT./3/ THE SLIGHT RISK AREA WAS EXTENDED NEWD INTOPORTIONS OF ERN KY...WRN VA...AND VICINITY FOR SVRWIND AND TORNADO RISK SHIFTING ENEWD THROUGH THE AFTERNOON...COHEN.. 04/28/2014
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