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MESOSCALE DISCUSSION 0747 NWS STORM PREDICTION CENTER NORMAN OK 0812 AM CDT TUE MAY 21 2013 AREAS AFFECTED...PARTS OF SRN OK AND NRN TX CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE VALID 211312Z - 211445Z PROBABILITY OF WATCH ISSUANCE...60 PERCENT SUMMARY...POTENTIAL EXISTS FOR ONGOING STORMS EXTENDING FROM EAST CENTRAL THROUGH SOUTH CENTRAL OK TO WRN NORTH TX TO BECOME SURFACE BASED LATER THIS MORNING. ISOLATED DAMAGING WINDS AND HAIL WILL BE THE PRIMARY THREATS WITH THE ONGOING ACTIVITY...WITH AN INCREASE IN THE SEVERE WEATHER THREAT LATER THIS MORNING...AND THE POTENTIAL FOR A NEW WW. DISCUSSION...MOSAIC RADAR IMAGERY THE LAST FEW HOURS INDICATED TSTMS CONTINUED TO DEVELOP AND MOVE ENEWD ACROSS CENTRAL...ERN OK INTO WEST CENTRAL AR...WHILE ADDITIONAL STORMS HAVE DEVELOPED SWWD THROUGH SWRN OK TO WRN N TX. THE ENTIRE EXTENT OF THE TSTM ACTIVITY APPEARS TO BE ELEVATED INCLUDING THE LATTER SWRN OK/WRN N TX STORMS THAT HAVE TENDED TO BECOME UNDERCUT BY A SWD ADVANCING COLD FRONT. INCREASING FORCING FOR ASCENT WITH AN APPROACHING SHORTWAVE TROUGH AND LOW LEVEL WAA OVER N TX AND SRN OK WILL SUPPORT CONTINUED TSTM DEVELOPMENT THROUGH THIS MORNING. VISIBLE SATELLITE IMAGERY SHOWS THE LIKELIHOOD FOR ABUNDANT SURFACE HEATING ALONG AND SOUTH OF THE RED RIVER...WHICH WILL FURTHER BOOST AN ALREADY MODERATELY UNSTABLE ENVIRONMENT...WITH THE POTENTIAL FOR STORMS TO BECOME SURFACE BASED. FURTHER STRENGTHENING OF WSWLY MIDLEVEL WINDS/BULK SHEAR WITH THE APPROACH OF THE SRN HIGH PLAINS TROUGH WILL SUPPORT STORM ORGANIZATION. SWLY SHEAR VECTORS ORIENTED PARALLEL TO THE ONGOING STORMS AND NEW DEVELOPMENT WILL FAVOR LINE SEGMENTS/BOWS WITH DAMAGING WINDS THE PRIMARY THREAT. HOWEVER...THE PRESENCE OF STEEP MIDLEVEL LAPSE RATES /NEAR 9 C PER KM ON THE 12Z FORT WORTH TX SOUNDING/ SUGGESTS HAIL WILL BE A THREAT AS WELL. THE LAST SEVERAL HRRR RUNS FORECAST UPSCALE GROWTH FOR ONE OR MORE QLCS STRUCTURES ACROSS SRN OK AND N TX LATER THIS MORNING INTO THE AFTERNOON. ..PETERS/KERR.. 05/21/2013
Originally posted by Casualboy100
YEs I love rain! Will it hit San marcos?
Originally posted by Casualboy100
reply to post by Havox
It's been hot all week! At least we get cold air now instead of hot winds.
A giant tornado, a mile wide or more, killed at least 91 people, 20 of them children, as it tore across parts of Oklahoma City and its suburbs Monday afternoon, flattening homes, flinging cars through the air and crushing at least two schools.
Originally posted by Casualboy100
YEs I love rain! Will it hit San marcos?
... EXTREMELY UNSTABLE AIRMASS POISED TO ERUPT IN SEVERE THUNDERSTORMS WITH LARGE HAIL AND DAMAGING WINDS BY LATE AFTERNOON THROUGH THIS EVENING...