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URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 141

NWS STORM PREDICTION CENTER NORMAN OK

155 AM CDT THU APR 5 2012



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       FAR SOUTHEAST ARKANSAS

       A LARGE PART OF LOUISIANA

       WESTERN AND CENTRAL MISSISSIPPI



EFFECTIVE THIS THURSDAY MORNING FROM 155 AM UNTIL 900 AM 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 80 STATUTE

MILES EAST AND WEST OF A LINE FROM 15 MILES EAST NORTHEAST OF

GREENVILLE MISSISSIPPI TO 30 MILES WEST SOUTHWEST OF BATON ROUGE

LOUISIANA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU1).



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...TSTMS HAVE FORMED OVER CNTRL AND NRN LA AND FAR SRN AR

IN THE PAST HOUR...LIKELY IN RESPONSE TO ASCENT ASSOCIATED WITH VORT

LOBE ROUNDING BASE OF NW AR UPR LOW.  ACTIVITY APPEARS TO BE FORMING

MAINLY ON WEAK SW-NE COLD FRONT THAT IS BECOMING APPARENT ONCE AGAIN

IN WAKE OF LARGE...PRE-FRONTAL MCS THAT MOVED THROUGH THE REGION

EARLY YESTERDAY.  INCREASING LOW LVL MOISTURE BENEATH DEEP EML AND

PRESENCE OF SUFFICIENT DEEP SHEAR FOR SUPERCELLS SUGGEST POTENTIAL

FOR LARGE HAIL AND DMGG WIND.  MODEST LOW LVL FLOW SHOULD LIMIT

OVERALL TORNADO THREAT.  BUT RICH LOW LVL MOISTURE...DISCRETE NATURE

OF STORMS...AND WEAK W-E BOUNDARY SE OF COLD FRONT IN CNTRL/SE LA

SUGGEST A NON-ZERO RISK FOR TORNADOES /REF MCD 452/.



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 26030.





...CORFIDI

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