URGENT - IMMEDIATE BROADCAST REQUESTED TORNADO WATCH NUMBER 232 NWS STORM PREDICTION CENTER NORMAN OK 1105 AM CDT WED APR 27 2011 THE NWS STORM PREDICTION CENTER HAS ISSUED A TORNADO WATCH FOR PORTIONS OF EXTREME SOUTHEAST ARKANSAS NORTHEAST LOUISIANA MUCH OF MISSISSIPPI EFFECTIVE THIS WEDNESDAY MORNING AND EVENING FROM 1105 AM UNTIL 700 PM CDT. ...THIS IS A PARTICULARLY DANGEROUS SITUATION... DESTRUCTIVE TORNADOES...LARGE HAIL TO 4 INCHES IN DIAMETER... THUNDERSTORM WIND GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS. THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 65 STATUTE MILES EAST AND WEST OF A LINE FROM 45 MILES EAST SOUTHEAST OF NATCHEZ MISSISSIPPI TO 50 MILES NORTH OF TUPELO MISSISSIPPI. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU2). 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. OTHER WATCH INFORMATION...CONTINUE...WW 229...WW 230...WW 231... DISCUSSION...A VERY VOLATILE SETUP IS DEVELOPING FOR PORTIONS OF MS LATER TODAY AS A MOIST AND VERY UNSTABLE AIR MASS RETURNS INTO AN AREA WITH IMPRESSIVE LOW LEVEL AND DEEP LAYER VERTICAL SHEAR PROFILES. ACTIVITY IS CURRENTLY DEVELOPING OVER SOUTHEAST AR/NORTHEAST LA. HOWEVER...IT APPEARS THE PRIMARY CONCERN WILL START BY EARLY AFTERNOON OVER CENTRAL/NORTHERN MS WHERE DISCRETE TORNADIC SUPERCELLS ARE LIKELY. ALL PARAMETERS SUGGEST THAT STRONG/VIOLENT AND LONG-TRACK TORNADOES ARE POSSIBLE. VERY LARGE HAIL AND WIDESPREAD DAMAGING WINDS ARE ALSO A CONCERN. AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO 4 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. MEAN STORM MOTION VECTOR 25040.
Wednesday, April 27, 2011
April 27: PDS Tornado Watch #1
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