Mesoscale Discussion 726 http://www.spc.noaa.gov/products/md/md0726.html

MESOSCALE DISCUSSION 0726 NWS STORM PREDICTION CENTER NORMAN OK 1226 PM CDT MON MAY 20 2013 AREAS AFFECTED...MUCH OF OK INTO NWRN TX AND SERN KS CONCERNING...SEVERE POTENTIAL...TORNADO WATCH LIKELY VALID 201726Z - 201930Z PROBABILITY OF WATCH ISSUANCE...95 PERCENT SUMMARY...SEVERE STORMS ARE LIKELY TO FORM THIS AFTERNOON WITH A FEW SIGNIFICANT TORNADOES...EXTREMELY LARGE HAIL...AND DAMAGING WINDS ALL POSSIBLE. TWO WATCHES WILL BE NEEDED SOON FROM KS INTO N TX.