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ALZ000-MSZ000-TNZ000-030300-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 59

NWS STORM PREDICTION CENTER NORMAN OK

120 PM CST FRI MAR 2 2012



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       NORTHERN ALABAMA

       NORTHERN AND CENTRAL MISSISSIPPI

       WESTERN AND MIDDLE TENNESSEE



EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 120 PM UNTIL 900

PM CST.



TORNADOES...HAIL TO 2 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 100 STATUTE

MILES EAST AND WEST OF A LINE FROM 55 MILES SOUTHWEST OF COLUMBUS

MISSISSIPPI TO 40 MILES NORTH NORTHEAST OF NASHVILLE TENNESSEE.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU9).



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 56...WW 57...WW 58...



DISCUSSION...18Z BNA/JAN/BMX SOUNDINGS INDICATE THAT AIR MASS HAS

BECOME EFFECTIVELY UNCAPPED WITH MLCAPE VALUES OF 1000-1500 J/KG.

BASED ON VISIBLE SATELLITE AND RADAR DATA...IT APPEARS THAT

MULTIPLE...SUBTLE BOUNDARIES WILL GIVE RISE TO SEVERE STORMS THIS

AFTERNOON AND EVENING.  THE STRONGEST VERTICAL SHEAR WILL REMAIN

ACROSS TN-PORTION OF WATCH...GRADUALLY DECREASING WITH SWD EXTENT.

NONETHELESS...THE KINEMATIC ENVIRONMENT ACROSS THE WATCH AREA WILL

BE MORE THAN SUFFICIENT TO SUPPORT SUPERCELLS CAPABLE OF TORNADOES

/POSSIBLY STRONG/...DAMAGING WINDS AND LARGE HAIL.



AVIATION...TORNADOES AND 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

500. MEAN STORM MOTION VECTOR 25040.





...MEAD

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