SPC Severe Thunderstorm Watch 374

By Newsroom America Feeds at 11 Jun 2012

WW 374 SEVERE TSTM TX 112055Z - 120400Z
URGENT - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WATCH NUMBER 374 NWS STORM PREDICTION CENTER NORMAN OK 355 PM CDT MON JUN 11 2012 THE NWS STORM PREDICTION CENTER HAS ISSUED A SEVERE THUNDERSTORM WATCH FOR PORTIONS OF WEST-CENTRAL AND NORTH-CENTRAL TEXAS EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 355 PM UNTIL 1100 PM CDT. HAIL TO 2.5 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS. THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 60 STATUTE MILES NORTH AND SOUTH OF A LINE FROM 30 MILES WEST OF SAN ANGELO TEXAS TO 40 MILES NORTH NORTHEAST OF DALLAS TEXAS. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU4). REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES. OTHER WATCH INFORMATION...CONTINUE...WW 372...WW 373... DISCUSSION...TSTMS ARE RAPIDLY DEVELOPING BETWEEN BPG AND SJT WITHIN A HOT...DEEPLY-MIXED BOUNDARY LAYER JUST AHEAD OF COLD FRONT WHERE CAP HAS BEEN ERODED. SUBSEQUENT STORM FORMATION IS ANTICIPATED LATE THIS AFTERNOON INTO EARLY EVENING NEWD ALONG LOW-LEVEL THERMAL AXIS INTO N-CNTRL TX WHERE ENVIRONMENT IS MODERATE TO EXTREMELY UNSTABLE WITH MLCAPE OF 2000-4000+ J/KG. WHILE VERTICAL SHEAR WILL REMAIN RELATIVELY WEAK...THE DEGREE OF INSTABILITY WILL PROMOTE VIGOROUS UP/DOWNDRAFTS WITH AN ASSOCIATED RISK FOR DAMAGING WINDS AND VERY LARGE HAIL. AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM MOTION VECTOR 31010. ...MEAD Read more

http://www.spc.noaa.gov/products/watch/ww0374.html

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