ZCZC SPCSWOMCD ALL ACUS11 KWNS 092032 SPC MCD 092032 OKZ000-TXZ000-092230- MESOSCALE DISCUSSION 0566 NWS STORM PREDICTION CENTER NORMAN OK 0332 PM CDT SAT MAY 09 2015 AREAS AFFECTED...SOUTH-CENTRAL OK AND NORTHERN/CENTRAL TX CONCERNING...TORNADO WATCH 150... VALID 092032Z - 092230Z THE SEVERE WEATHER THREAT FOR TORNADO WATCH 150 CONTINUES. SUMMARY...LARGE HAIL AND TORNADO POTENTIAL IS EXPECTED TO STEADILY INCREASE ACROSS NORTH-CENTRAL TX THROUGH EARLY EVENING...INITIALLY IN AREAS JUST TO THE WEST OF THE DFW METROPLEX VICINITY. LOCALLY DAMAGING WINDS/MARGINALLY SEVERE HAIL AND POSSIBLY SOME TORNADO RISK WILL OTHERWISE CONTINUE ACROSS SOUTH-CENTRAL OK/FAR NORTHEAST TX. TORNADO WATCH 150 CONTINUES UNTIL 02Z. DISCUSSION...AN OUTFLOW BOUNDARY-RELATED EFFECTIVE WARM FRONT EXTENDS ROUGHLY WEST-EAST ACROSS FAR NORTH TX ROUGHLY ALONG THE NORTHERN EDGE OF THE METROPLEX AND THE ADJACENT NORTHERN TWO-TIERS OF COUNTIES OF NORTH TX. STORMS SHOULD CONTINUE TO DEVELOP ALONG THE I-20 CORRIDOR IN VICINITY OF BRECKENRIDGE/BROWNWOOD/STEPHENVILLE VICINITIES NEAR A SURFACE LOW/DRYLINE THROUGH LATE AFTERNOON. AS AT LEAST ISOLATED STORMS CONTINUE TO DEVELOP/MATURE AND SPREAD NORTHEASTWARD...LARGE HAIL WILL BE POSSIBLE...AND TORNADOES /INCLUDING A STRONG TORNADO RISK/ WOULD ESPECIALLY BE A CONCERN AS STORMS ENCOUNTER A STRONGER CORRIDOR OF LOW-LEVEL SOUTHERLY WINDS TO THE EAST AND/OR INTERACT WITH THE AFOREMENTIONED OUTFLOW BOUNDARY. A SPECIAL 19Z OBSERVED SOUNDING FROM DALLAS-FORT WORTH SAMPLED A VERY MOIST BOUNDARY LAYER /LOWER 70S F SURFACE DEWPOINTS/ WITH 300+ M2/S2 EFFECTIVE SRH. FARTHER NORTH...THE PRIMARY SCENARIO WILL BE FOR CONTINUED STORM MERGERS AHEAD OF SOUTHEASTWARD-PROPAGATING OUTFLOW CURRENTLY ACROSS PORTIONS OF SOUTHWEST/SOUTH-CENTRAL OK. LOCALLY DAMAGING WINDS/SOME HAIL WILL BE THE PRIMARY HAZARDS ACROSS SOUTH-CENTRAL OK. ..GUYER.. 05/09/2015 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...TSA...FWD...OUN...SJT... LAT...LON 35389696 35079607 33719625 32039711 31799941 33959891 35389696 NNNN