

000 

WWUS20 KWNS 201833

SEL6

SPC WW 201833

MSZ000-210000-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 586

NWS STORM PREDICTION CENTER NORMAN OK

135 PM CDT FRI JUN 20 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       MISSISSIPPI



EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 135 PM UNTIL 700

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 40 MILES EAST

NORTHEAST OF GREENWOOD MISSISSIPPI TO 45 MILES WEST OF PINE BELT

MISSISSIPPI.  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 584...WW 585...



DISCUSSION...BAND OF INTENSE STORMS NOW DEVELOPING EAST ACROSS THE

DELTA WILL CONTINUE TO PRODUCE STRONG TO OCCASIONALLY DAMAGING

WINDS. THIS ACTIVITY APPEARS TIED TO MID LEVEL SHORT WAVE/MCV WITH

ENHANCED MID LEVEL WINDS UP TO 30KT CONTRIBUTING TO LINEAR

ORGANIZATION AND OCCASIONAL LONGER-LIVED UPDRAFT ROTATION IN SOME

STORM ELEMENTS. DCAPE VALUES AHEAD OF THE LINE SEGMENT ARE NOT

AROUND 1000 J/KG WHICH SUGGESTS AN ENHANCED POTENTIAL FOR DAMAGING

DOWNBURSTS AS THE CONVECTION MOVES EAST THIS AFTERNOON.



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 500. MEAN STORM

MOTION VECTOR 26030.





...CARBIN

