

948 

WWUS20 KWNS 171901

SEL7

SPC WW 171901

GAZ000-NCZ000-SCZ000-180200-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 417

NWS STORM PREDICTION CENTER NORMAN OK

300 PM EDT WED JUL 17 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  NORTHEAST GEORGIA

  SOUTHWEST NORTH CAROLINA

  UPSTATE AND PIEDMONT SOUTH CAROLINA



* EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 300 PM

  UNTIL 1000 PM EDT.



* PRIMARY THREATS INCLUDE...

  NUMEROUS DAMAGING WIND GUSTS TO 70 MPH LIKELY

  SEVERAL LARGE HAIL EVENTS TO 1.5 INCHES IN DIAMETER POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 70

STATUTE MILES EITHER SIDE OF A LINE FROM 5 MILES NORTHEAST OF HOT

SPRINGS NORTH CAROLINA TO 35 MILES SOUTH SOUTHEAST OF COLUMBIA

SOUTH CAROLINA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU7).



PRECAUTIONARY/PREPAREDNESS ACTIONS...



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 416...



DISCUSSION...TSTMS NOW FORMING IN MOIST...WEAKLY CAPPED...STRONGLY

HEATED...AND WEAKLY UPSLOPE ENVIRONMENT OVER CNTRL/WRN NC AND CNTRL

SC EXPECTED TO INCREASE IN COVERAGE AND STRENGTH. 20-25 KT DEEP

ENELY LOW TO MID-TROPOSPHERIC FLOW SHOULD FOSTER COLD POOL

AMALGAMATION AND WSWWD PROPAGATION/SMALL BOW DEVELOPMENT. A RISK FOR

DMGG WIND/MARGINALLY SVR HAIL WILL EXIST THROUGH THIS EVE. UPR LVL

VENTING PROVIDED BY MODERATE...ELY HIGH-LVL JET ON S SIDE OF UPR

RIDGE MAY FURTHER ENHANCE STORM SUSTENANCE/SVR POTENTIAL.



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 04020.





...CORFIDI

