

307 

WWUS20 KWNS 281948

SEL2

SPC WW 281948

MSZ000-290200-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 532

NWS STORM PREDICTION CENTER NORMAN OK

245 PM CDT SUN JUN 28 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       CENTRAL AND EASTERN MISSISSIPPI



EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 245 PM UNTIL 900

PM CDT.



HAIL TO 1 INCH 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 50

STATUTE MILES EAST AND WEST OF A LINE FROM 40 MILES WEST

NORTHWEST OF COLUMBUS MISSISSIPPI TO 45 MILES SOUTHWEST OF

MERIDIAN MISSISSIPPI.  FOR A COMPLETE DEPICTION OF THE WATCH SEE

THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU2).



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 530...WW 531...



DISCUSSION...A LINE OF THUNDERSTORMS HAD DEVELOPED ALONG THE FRONT

IN NORTHERN MISSISSIPPI AND IS EXPECTED TO TRACK SOUTH-SOUTHEASTWARD

THROUGH PORTIONS OF CENTRAL AND EASTERN MISSISSIPPI INTO THE EARLY

EVENING HOURS. DESPITE ONLY AROUND 20 KT OF DEEP LAYER SHEAR...THE

DEVELOPMENT OF AN ORGANIZED OUTFLOW BOUNDARY COMBINED WITH

TEMPERATURES IN THE MID/UPPER 90S AND MLCAPES NEAR 3000 J/KG ARE

FAVORABLE FOR WET MICROBURSTS AND WIND DAMAGE.



AVIATION...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 550. MEAN STORM MOTION

VECTOR 34020.





...IMY

