

279 

WWUS20 KWNS 210626

SEL4

SPC WW 210626

GAZ000-211400-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 174

NWS STORM PREDICTION CENTER NORMAN OK

225 AM EDT THU APR 21 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       NORTHERN AND CENTRAL GEORGIA



EFFECTIVE THIS THURSDAY MORNING FROM 225 AM UNTIL 1000 AM EDT.



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 60

STATUTE MILES EAST AND WEST OF A LINE FROM 65 MILES NORTHEAST OF

ROME GEORGIA TO 45 MILES SOUTH SOUTHEAST OF ATLANTA GEORGIA.  FOR

A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU4).



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 173...



DISCUSSION...MCS WITH EMBEDDED MCV NOW ENTERING NW GA EXPECTED TO

CONTINUE EWD.  WHILE AREA VWP AND INSTABILITY DATA APPEAR MARGINAL

FOR WIDESPREAD SVR WEATHER...DEGREE OF SYSTEM ORGANIZATION...RECENT

OCCURRENCE OF DMGG WIND IN ERN AL...AND RADAR DETECTION OF 50-55 KT

OUTFLOW AROUND 2000 FT ALONG CONVECTIVE BAND IN NW GA SUGGEST THAT

POTENTIAL WILL EXIST FOR AT LEAST SPORADIC INSTANCES OF DMGG WIND

AND MARGINALLY SVR HAIL.



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 450. MEAN STORM MOTION

VECTOR 26030.





...CORFIDI

