SPC Severe Thunderstorm Watch 26

WW 26 SEVERE TSTM OK TX 040100Z - 040800Z
URGENT - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WATCH NUMBER 26 NWS STORM PREDICTION CENTER NORMAN OK 700 PM CST FRI FEB 3 2012 THE NWS STORM PREDICTION CENTER HAS ISSUED A SEVERE THUNDERSTORM WATCH FOR PORTIONS OF SOUTHEAST OKLAHOMA NORTHEAST TEXAS EFFECTIVE THIS FRIDAY NIGHT AND SATURDAY MORNING FROM 700 PM UNTIL 200 AM CST. HAIL TO 1.5 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 70 STATUTE MILES EAST AND WEST OF A LINE FROM 40 MILES NORTHWEST OF DE QUEEN ARKANSAS TO 25 MILES SOUTHWEST OF DALLAS TEXAS. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU6). 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 25... DISCUSSION...BROKEN BAND OF TSTMS FROM DUA TO MWL HAS RECENTLY INTENSIFIED LIKELY DUE TO INCREASED LOW-LEVEL UPLIFT ASSOCIATED WITH THE ARRIVAL OF COLD FRONT FROM THE NW/W. 00Z FWD SOUNDING IS REPRESENTATIVE OF THE AMBIENT ENVIRONMENT...FEATURING A RATHER DEEP LOW-LEVEL MOIST LAYER AND STEEP MIDLEVEL LAPSE RATES WITH MLCAPE OF 1000-1500 J/KG. KINEMATIC ENVIRONMENT WILL CONTINUE TO FAVOR UPDRAFT ROTATION GIVEN 40-50 KT OF DEEP-LAYER SHEAR...AND A BRIEF TORNADO REMAINS POSSIBLE AS CONVECTIVE LINE INTERACTS WITH WARM FRONT PRESENT ACROSS SERN OK. HOWEVER...GIVEN THE PREDOMINANT LINEAR CONVECTIVE MODE AND TENDENCY FOR THE LLJ TO WEAKEN THROUGH 04/06Z ACROSS THE WATCH AREA...EXPECT SEVERE HAIL AND DAMAGING WIND GUSTS TO BE THE PRIMARY HAZARDS. AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM MOTION VECTOR 25025. ...MEAD Read more

http://www.spc.noaa.gov/products/watch/ww0026.html