

000 

WWUS20 KWNS 150555

SEL6

SPC WW 150555

ALZ000-151300-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 116

NWS STORM PREDICTION CENTER NORMAN OK

1255 AM CDT SAT MAR 15 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       NORTHERN AND CENTRAL ALABAMA



EFFECTIVE THIS SATURDAY MORNING FROM 1255 AM UNTIL 800 AM CDT.



HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70

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



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 65

STATUTE MILES EAST AND WEST OF A LINE FROM 20 MILES NORTH OF

HUNTSVILLE ALABAMA TO 25 MILES SOUTH OF CENTREVILLE ALABAMA.  FOR

A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU6).



REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE

FAVORABLE FOR 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. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY

DO PRODUCE TORNADOES.



OTHER WATCH INFORMATION...CONTINUE...WW 111...WW 112...WW

113...WW 114...WW 115...



DISCUSSION...LONG-LIVED CLUSTER OF SEVERE STORMS MOVING EAST FROM MS

EXPECTED TO CONTINUE ACROSS NRN HALF OF AL NEXT FEW HOURS. MCS

SHOULD BE SUSTAINED BY MASS INFLOW DUE TO INCREASINGLY STRONG LOW

LEVEL JET AHEAD OF DEEPENING LOW PRESSURE MOVING EAST TOWARD THE

LOWER MS VALLEY THROUGH DAYBREAK. SHEAR AND INSTABILITY WILL SUPPORT

EMBEDDED SUPERCELLS WITHIN THE LARGER CONVECTIVE MASS WITH ATTENDANT

LARGE HAIL AND DAMAGING WIND HAZARDS.



AVIATION...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 350. MEAN STORM

MOTION VECTOR 24040.





...CARBIN

