

000 

WWUS20 KWNS 291834

SEL4

SPC WW 291834

COZ000-KSZ000-NEZ000-SDZ000-300200-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 384

NWS STORM PREDICTION CENTER NORMAN OK

135 PM CDT THU MAY 29 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       PARTS OF NORTHEAST COLORADO

       SMALL PART OF NORTHWEST KANSAS

       MUCH OF WESTERN NEBRASKA INCLUDING THE PANHANDLE

       PARTS OF SOUTHWESTERN SOUTH DAKOTA



EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 135 PM UNTIL

900 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 75 STATUTE

MILES EAST AND WEST OF A LINE FROM 55 MILES SOUTHEAST OF AKRON

COLORADO TO 90 MILES NORTHEAST OF CHADRON NEBRASKA.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU4).



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...THUNDERSTORMS WILL INCREASE IN NUMBER AND INTENSITY

ACROSS WATCH AREA AS LITTLE REMAINING CINH.  STRONG DEEP LAYER

SHEAR...STEEP LAPSE RATES AND MLCAPE TO 1000 J/KG SUPPORT SUPERCELL

DEVELOPMENT.  PRIMARY THREAT WILL BE LARGE HAIL AND DOWNBURSTS WINDS

BUT TORNADOES WILL BE POSSIBLE FROM 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

450. MEAN STORM MOTION VECTOR 24035.





...HALES

