

000 

WWUS20 KWNS 241938

SEL8

SPC WW 241938

SDZ000-250300-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 348

NWS STORM PREDICTION CENTER NORMAN OK

240 PM CDT SAT MAY 24 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       LARGE PART OF CENTRAL AND EASTERN SOUTH DAKOTA



EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 240 PM UNTIL

1000 PM CDT.



TORNADOES...HAIL TO 2.5 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 90 STATUTE

MILES EAST AND WEST OF A LINE FROM 30 MILES NORTH NORTHWEST OF

MOBRIDGE SOUTH DAKOTA TO 55 MILES SOUTH OF CHAMBERLAIN SOUTH

DAKOTA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED

WATCH OUTLINE UPDATE (WOUS64 KWNS WOU8).



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 346...WW 347...



DISCUSSION...STRONG TROUGH/MID LEVEL JET MAX ROTATING NEWD ACROSS

SD.  AIR MASS IS RAPIDLY DESTABILIZING NWD AHEAD OF COLD FRONT WRN

SD.  THUNDERSTORMS WILL INCREASE IN NUMBER/INTENSITY WITH POTENTIAL

FOR SUPERCELLS.  LARGE HAIL AND POSSIBLE TORNADOS PARTICULARLY

ASSOCIATED WITH ANY SUPERCELL.



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

SURFACE AND ALOFT TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE

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

500. MEAN STORM MOTION VECTOR 23040.





...HALES

