SPC Severe Thunderstorm Watch 20

WW 20 SEVERE TSTM AR LA OK TX 011835Z - 020200Z
URGENT - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WATCH NUMBER 20 NWS STORM PREDICTION CENTER NORMAN OK 1235 PM CST WED FEB 1 2012 THE NWS STORM PREDICTION CENTER HAS ISSUED A SEVERE THUNDERSTORM WATCH FOR PORTIONS OF CENTRAL AND SOUTHERN ARKANSAS NORTHERN LOUISIANA EXTREME SOUTHEAST OKLAHOMA NORTHEAST TEXAS EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 1235 PM UNTIL 800 PM CST. HAIL TO 2 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 95 STATUTE MILES NORTH AND SOUTH OF A LINE FROM 60 MILES SOUTHWEST OF DE QUEEN ARKANSAS TO 50 MILES EAST NORTHEAST OF PINE BLUFF ARKANSAS. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU0). 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. DISCUSSION...A CLUSTER OF THUNDERSTORMS OVER SOUTHEAST OK WILL SPREAD EASTWARD INTO AR...WHILE NEW STORMS POTENTIALLY DEVELOPING SOUTHWARD INTO NORTHEAST TX. STEEP MID LEVEL LAPSE RATES AND MODERATE CAPE VALUES WILL PROMOTE THE RISK OF A FEW INTENSE CELLS CAPABLE OF LARGE HAIL AND GUSTY WINDS. AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 400. MEAN STORM MOTION VECTOR 27035. ...HART Read more

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