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Last Updated: 8:56 PM GMT on August 22, 2012
— Last Comment: 12:45 AM GMT on November 21, 2009
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 MESOSCALE DISCUSSION 1795 NWS STORM PREDICTION CENTER NORMAN OK 0950 PM CDT MON AUG 20 2012 AREAS AFFECTED...PORTIONS NW TX AND SOUTH-PLAINS REGION. CONCERNING...SEVERE THUNDERSTORM WATCH 586... VALID 210250Z - 210415Z THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 586 CONTINUES. SUMMARY...REMAINDER WW MAY BE CLEARED BEHIND MCS MOVING SEWD 30-40 KT ACROSS SERN PANHANDLE AND SOUTH-PLAINS REGION. PRIND SVR THREAT HAS PEAKED...BUT CORRIDOR OF THREAT FOR DAMAGING WIND REMAINS BETWEEN CDS-LBB BEFORE COMPLEX ENCOUNTERS PROGRESSIVELY MORE STABLE AIR AND WEAKENS FURTHER. DISCUSSION...FORWARD-PROPAGATIONAL MCS THAT PRODUCED SEVERAL SVR GUSTS IN AMA AREA -- INCLUDING AT LEAST TWO ABOVE 65 KT -- WAS EVIDENT AT 230Z FROM HALL COUNTY SWWD TO NEAR LBB. MRGLLY SVR/50-KT GUSTS ALSO WERE MEASURED AT LBB AT 226Z AND TURKEY (HALL COUNTY) MESONET SITE AT 220Z. NARROW CORRIDOR OF LINGERING SFC-BASED BUOYANCY IS EVIDENT ALONG AND SW OF QUASISTATIONARY SFC FRONT ANALYZED FROM HALL COUNTY SEWD TO NEAR ABI...AND ALONG AND E OF MOIST AXIS DRAWN JUST E OF LBB-SJT LINE. SFC DEW POINTS GENERALLY MID 50S TO LOW 60S F CONTRIBUTE TO ESTIMATED MLCAPE 300-800 J/KG IN THAT SWATH. ALONG AND W OF FRONT...MLCAPE WILL CONTINUE DECREASING TREND WHILE MLCINH INCREASES WITH TIME...AS DIABATIC SFC COOLING CONTINUES. THIS SHOULD CONTINUE GEN/GRADUAL WKNG TREND ALREADY EVIDENT IN REFLECTIVITY/BASE-VELOCITY RADAR AND IR-SATELLITE IMAGERY. HOWEVER...A FEW DAMAGING GUSTS CANNOT BE RULED OUT THROUGH ABOUT 04Z AS CONVECTION PROCEEDS SEWD OVER CENTRAL/SRN SECTIONS OF CAPROCK AND ERN SOUTH-PLAINS REGION. ..EDWARDS.. 08/21/2012 ATTN...WFO...OUN...SJT...LUB...MAF...
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