ZCZC SPCSWOMCD ALL ACUS11 KWNS 252233 SPC MCD 252233 MOZ000-ARZ000-OKZ000-KSZ000-260000- MESOSCALE DISCUSSION 0143 NWS STORM PREDICTION CENTER NORMAN OK 0533 PM CDT WED MAR 25 2015 AREAS AFFECTED...PORTIONS OF SOUTHWEST TO NORTHEAST OK...SOUTHWEST AND SOUTH-CENTRAL MO...AND NORTHWEST AND NORTH-CENTRAL AR CONCERNING...SEVERE THUNDERSTORM WATCH 6... VALID 252233Z - 260000Z THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 6 CONTINUES. SUMMARY...THE SEVERE THUNDERSTORM THREAT WILL CONTINUE ACROSS WATCH 6 THIS EVENING. LARGE HAIL WILL BE THE MAIN THREAT...BUT SOME STRONG WINDS AND PERHAPS A BRIEF TORNADO ALSO WILL BE POSSIBLE. DISCUSSION...STORMS HAVE DEVELOPED ACROSS SOUTHWEST OK IN THE VICINITY OF THE SFC LOW AND DRYLINE/COLD FRONT INTERSECTION AND WW 6 HAS BEEN EXTENDED TO THE SOUTHWEST /REF MCD 0142 FOR MORE DETAILS/. ADDITIONAL THUNDERSTORMS WERE DEVELOPING NEAR THE FRONT IN LOGAN COUNTY IN CENTRAL OK. THESE STORMS LIKELY WILL BECOME QUICKLY UNDERCUT BY THE FRONT. HOWEVER...MIDLEVEL LAPSE RATES NEAR 8.5 DEGREES C PER KM AND MLCAPE NEAR 2500 J/KM IN CENTRAL TOWARD NORTHEAST OK WILL STILL SUPPORT PRODUCTION OF VERY LARGE HAIL. FURTHER EAST/NORTHEAST TOWARD E-CENTRAL OK INTO NW AR...INSTABILITY BEGINS TO WANE...BUT IS STILL ADEQUATE IN COMBINATION WITH MIDLEVEL LAPSE RATES NEAR 7.5 DEG C PER KM TO SUPPORT SEVERE HAIL. OVER THE LAST 30-60 MINUTES DEVELOPING STORMS IN OKLAHOMA HAVE SHOWN A TENDENCY TO QUICKLY BECOME LINEAR. WITH LOW LEVEL LAPSE RATES NEAR IN THE WARM SECTOR TO THE SOUTH OF THE FRONT NEAR 8 DEG C PER KM...ANY STORMS THAT CAN REMAIN SURFACE BASED COULD POSE A DAMAGING WIND THREAT IN ADDITION TO LARGE HAIL. ADDITIONALLY...A BRIEF TORNADO THREAT MAY EXIST NEAR THE FRONT FROM CENTRAL INTO NORTHEAST OKLAHOMA WHERE INCREASING...CYCLONICALLY CURVED HODOGRAPHS WERE INDICATED PER WSR-88D VWP DATA FROM KINX...AND TO A LESSER DEGREE KTLX VWPS. ..LEITMAN.. 03/25/2015 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...LZK...SGF...TSA...ICT...OUN... LAT...LON 36869799 37559146 35229142 34549800 36869799 NNNN