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URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 485

NWS STORM PREDICTION CENTER NORMAN OK

335 PM CDT THU JUN 16 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       EXTREME SOUTHWEST ALABAMA

       CENTRAL AND SOUTHEAST MISSISSIPPI



EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 335 PM UNTIL

900 PM CDT.



HAIL TO 1.5 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 60

STATUTE MILES EAST AND WEST OF A LINE FROM 25 MILES NORTH

NORTHEAST OF GREENWOOD MISSISSIPPI TO 35 MILES SOUTH SOUTHEAST OF

PINE BELT MISSISSIPPI.  FOR A COMPLETE DEPICTION OF THE WATCH SEE

THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU5).



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 483...WW 484...



DISCUSSION...MULTICELL STORM CLUSTERS WILL CONTINUE TO DEVELOP

SLOWLY WWD ON STORM OUTFLOWS AND MERGERS.  A RESERVOIR OF STRONG

INSTABILITY AND STEEP LOW-LEVEL LAPSE RATES IS PRESENT ACROSS MUCH

OF CENTRAL/SRN MS AHEAD OF THESE STORMS...AND THIS WILL SUPPORT A

CONTINUED RISK FOR DAMAGING WET MICROBURSTS AND MARGINALLY SEVERE

HAIL IN THE STRONGEST STORMS BEFORE THE BOUNDARY STABILIZES LATER

THIS EVENING.



AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT

TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. MEAN STORM

MOTION VECTOR 09010.





...THOMPSON

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