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WWUS20 KWNS 212305

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URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 98

NWS STORM PREDICTION CENTER NORMAN OK

605 PM CDT WED MAR 21 2012



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       EXTREME SOUTHEAST LOUISIANA

       SOUTHEAST MISSISSIPPI

       COASTAL WATERS



EFFECTIVE THIS WEDNESDAY NIGHT AND THURSDAY MORNING FROM 605 PM

UNTIL 100 AM CDT.



TORNADOES...HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS

TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 40 STATUTE

MILES EAST AND WEST OF A LINE FROM 25 MILES NORTHWEST OF MERIDIAN

MISSISSIPPI TO 20 MILES SOUTHEAST OF BOOTHVILLE LOUISIANA.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU8).



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 97...



DISCUSSION...LITTLE CHANGE IS ANTICIPATED IN THE SITUATION ACROSS

THE DELTA THROUGH LATE THIS EVENING. VERY MOIST AIRMASS WILL

CONTINUE TO UNDERGO DEEP LAYER ASCENT FOCUSED ALONG A

QUASI-STATIONARY N-S ORIENTED BAROCLINIC ZONE ASSOCIATED WITH THE

LARGE CUT-OFF LOW CENTERED ACROSS OK/TX. FORCING SHOULD MAINTAIN THE

CHANCE FOR A FEW MORE ROBUST TSTM UPDRAFTS AMIDST STRONG LOW LEVEL

SHEAR SUPPORTIVE OF ONE OR TWO BRIEF TORNADOES...AND/OR WIND DMG

EVENTS. LATEST GUIDANCE APPEARS TO SUGGEST THERE MAY BE A BRIEF LULL

IN THE STRONGER SYNOPTIC SCALE ASCENT UNTIL THE NEXT VORT LOBE

ROTATES/PIVOTS INTO THE ERN FLANK OF THE LARGE CLOSED CYCLONE LATER

TONIGHT AND STRONG ASCENT AGAIN ACTS ON THE VERY MOIST AIRMASS TO

SUPPORT RENEWED TSTM DEVELOPMENT. IN ADDITION TO THE ISOLATED SEVERE

WEATHER POTENTIAL...HEAVY RAIN WILL CONTINUE TO POSE FLOODING

PROBLEMS.



AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL

SURFACE AND ALOFT TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND

GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450.

MEAN STORM MOTION VECTOR 20040.





...CARBIN

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