

000 

WWUS20 KWNS 290234

SEL6

SPC WW 290234

NEZ000-SDZ000-290900-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 86

NWS STORM PREDICTION CENTER NORMAN OK

935 PM CDT WED MAR 28 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       LARGE PART OF WESTERN AND CENTRAL NEBRASKA

       PART OF SOUTHERN SOUTH DAKOTA



EFFECTIVE THIS WEDNESDAY NIGHT AND THURSDAY MORNING FROM 935 PM

UNTIL 400 AM 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 55 STATUTE

MILES EAST AND WEST OF A LINE FROM 85 MILES NORTH OF VALENTINE

NEBRASKA TO 40 MILES EAST SOUTHEAST OF IMPERIAL NEBRASKA.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU6).



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...THIS TORNADO WATCH REPLACES TORNADO

WATCH NUMBER 81. WATCH NUMBER 81 WILL NOT BE IN EFFECT AFTER 935

PM CDT. CONTINUE...WW 82...WW 83...WW 84...WW 85...



DISCUSSION...STRONG SHEAR PROFILES REMAIN IN PLACE WITH AND AHEAD OF

ACTIVE SUPERCELLS THAT EXTEND ALONG WRN EDGE OF WATCH.  ALTHOUGH THE

THREAT FOR TORNADOES EXPECTED TO SLOWLY DIMINISH WITH LOSS OF

HEATING...A CONTINUED THREAT FOR LARGE HAIL AND ISOLATED TORNADOES

WILL CONTINUE SEVERAL MORE HOURS.



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

500. MEAN STORM MOTION VECTOR 21035.





...HALES

