

000 

WWUS20 KWNS 282320

SEL7

SPC WW 282320

SDZ000-290400-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 767

NWS STORM PREDICTION CENTER NORMAN OK

620 PM CDT MON JUL 28 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       CENTRAL SOUTH DAKOTA



EFFECTIVE THIS MONDAY EVENING FROM 620 PM UNTIL 1100 PM CDT.



TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND

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

AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 50 STATUTE

MILES EAST AND WEST OF A LINE FROM 45 MILES NORTHWEST OF MOBRIDGE

SOUTH DAKOTA TO 40 MILES SOUTH OF PIERRE SOUTH DAKOTA.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU7).



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.



DISCUSSION...ISOLATED TORNADIC STORM OVER CENTRAL SD WILL CONTINUE

TO TRACK SOUTHEASTWARD ALONG SURFACE BOUNDARY FOR ANOTHER FEW

HOURS...WHILE OTHER STORMS DEVELOP IN THE REGION.  EXTREME

INSTABILITY AND BACKED LOW LEVEL WINDS MAY CONTINUE TO OVERCOME WARM

MID LEVEL TEMPERATURES TO MAINTAIN THREAT OF SUPERCELLS THIS

EVENING.



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

SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE

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

600. MEAN STORM MOTION VECTOR 32020.





...HART

