

657 

WWUS20 KWNS 171955

SEL5

SPC WW 171955

SCZ000-CWZ000-180200-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 685

NWS STORM PREDICTION CENTER NORMAN OK

255 PM EST MON DEC 17 2012



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       SOUTHERN AND EASTERN SOUTH CAROLINA

       COASTAL WATERS



EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 255 PM UNTIL 900

PM EST.



TORNADOES...HAIL TO 0.5 INCH IN DIAMETER...THUNDERSTORM WIND

GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE

AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 40 STATUTE

MILES EITHER SIDE OF A LINE FROM 80 MILES SOUTHWEST OF CHARLESTON

SOUTH CAROLINA TO 45 MILES EAST NORTHEAST OF CHARLESTON SOUTH

CAROLINA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU5).



REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR

TORNADOES AND 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.



OTHER WATCH INFORMATION...CONTINUE...WW 683...WW 684...



DISCUSSION...SW-NE SQLN OVER SRN/ERN GA...WITH EMBEDDED LEWPS/BOWING

SEGMENTS...EXPECTED TO CONTINUE E INTO SRN/ERN SC...WHERE LOW-LVL

AIR MASS RECOVERY CONTINUES INVOF DIFFUSE W-E WARM FRONT. STRENGTH

OF LOW TO MID-LVL WIND FIELD AND PRESENCE OF SUSTAINED

STORMS/EMBEDDED SUPERCELLS UPSTREAM WITHIN SQLN...SUGGEST POTENTIAL

FOR DMGG WIND AND POSSIBLY A TORNADO OR TWO...THROUGH EARLY EVE.



AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL

SURFACE AND ALOFT TO 0.5 INCH. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

350. MEAN STORM MOTION VECTOR 26045.





...CORFIDI

