

000 

WWUS20 KWNS 110007

SEL0

SPC WW 110007

ALZ000-TNZ000-110700-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 300

NWS STORM PREDICTION CENTER NORMAN OK

705 PM CDT SAT MAY 10 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       NORTHERN/CENTRAL ALABAMA

       SOUTHERN MIDDLE TENNESSEE



EFFECTIVE THIS SATURDAY NIGHT AND SUNDAY MORNING FROM 705 PM

UNTIL 200 AM CDT.



TORNADOES...HAIL TO 2.5 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 85 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 35 MILES WEST NORTHWEST OF

MUSCLE SHOALS ALABAMA TO 40 MILES EAST NORTHEAST OF GADSDEN

ALABAMA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU0).



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 293...WW 294...WW

295...WW 297...WW 298...WW 299...



DISCUSSION...TSTMS ARE BEGINNING TO FORM INVOF A WARM FRONT

BISECTING NRN AL.  THE FRONT IS EXPECTED TO LIFT NWD INTO SRN MIDDLE

TN WITH TIME THIS EVENING.  MEANWHILE...SUPERCELL TSTMS UPSTREAM

CROSSING THE MS RVR WILL MOVE ESEWD AND BEGIN MOVING INTO MIDDLE TN

AND NRN/CNTRL PARTS OF AL LATER THIS EVENING.  THOUGH LOW-LEVEL

SHEAR IS MODEST ATTM...IT IS EXPECTED TO INCREASE THROUGH THE

EVENING AS THE UPSTREAM IMPULSE MOVES SEWD AND THE SLY LLJ

INTENSIFIES.



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

SURFACE AND ALOFT TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

500. MEAN STORM MOTION VECTOR 24035.





...RACY/EVANS

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