SPC Tornado Watch 707
Sun, 24 Oct 2010 13:55:02 -0500
URGENT - IMMEDIATE BROADCAST REQUESTED TORNADO WATCH NUMBER 707 NWS STORM PREDICTION CENTER NORMAN OK 155 PM CDT SUN OCT 24 2010 THE NWS STORM PREDICTION CENTER HAS ISSUED A TORNADO WATCH FOR PORTIONS OF SOUTHERN AND CENTRAL ARKANSAS NORTHERN LOUISIANA FAR SOUTHEAST OKLAHOMA NORTHEAST TEXAS EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 155 PM UNTIL 1000 PM CDT. TORNADOES...HAIL TO 2.5 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS. THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 105 STATUTE MILES EAST AND WEST OF A LINE FROM 55 MILES WEST NORTHWEST OF PINE BLUFF ARKANSAS TO 65 MILES SOUTH OF LONGVIEW TEXAS. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU7). REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR TORNADOES AND 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. DISCUSSION...MULTIPLE ZONES OF TSTM GENESIS ARE ANTICIPATED THIS AFTERNOON...1) ALONG PRE-FRONTAL TROUGH OVER ERN TX...AND 2) WITHIN FREE-WARM SECTOR ALONG ENHANCED BANDS OF LOW-LEVEL CONFLUENCE. THE AMBIENT THERMODYNAMIC ENVIRONMENT IS CHARACTERIZED BY A MOIST BOUNDARY LAYER WITH DEW POINTS IN THE 60S TO AROUND 70 F. WHEN COUPLED WITH STRONG DIABATIC HEATING AND STEEPENING MIDLEVEL LAPSE RATES FROM THE W...ENVIRONMENT IS ALREADY MODERATELY UNSTABLE WITH MLCAPE VALUES OF 1500-2500 J/KG. GIVEN THE PRESENCE OF 40-50 KT EFFECTIVE BULK SHEAR AND STEADILY STRENGTHENING LOW-LEVEL SHEAR /I.E. MASS RESPONSE TO APPROACHING VORTICITY MAXIMUM/...SETUP WILL FAVOR SUPERCELLS CAPABLE OF LARGE HAIL...DAMAGING WINDS AND THE POSSIBILITY OF A FEW TORNADOES. AVIATION...TORNADOES AND 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 25030. ...MEADRead more
SPC Tornado Watch 707 Status Reports
Sun, 24 Oct 2010 13:55:11 -0500
STATUS FOR WATCH 0707 HAS NOT BEEN ISSUED YETRead more
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