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000 

WWUS20 KWNS 040044

SEL4

SPC WW 040044

COZ000-NEZ000-040600-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 224

NWS STORM PREDICTION CENTER NORMAN OK

645 PM MDT THU MAY 3 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       NORTHEAST COLORADO

       THE NEBRASKA PANHANDLE



EFFECTIVE THIS THURSDAY NIGHT FROM 645 PM UNTIL MIDNIGHT MDT.



TORNADOES...HAIL TO 1.5 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 50 STATUTE

MILES EAST AND WEST OF A LINE FROM 10 MILES NORTH OF CHADRON

NEBRASKA TO 40 MILES SOUTH SOUTHEAST OF AKRON COLORADO.  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.



OTHER WATCH INFORMATION...CONTINUE...WW 218...WW 219...WW

220...WW 221...WW 222...WW 223...



DISCUSSION...SMALL MCS WITH EMBEDDED SUSTAINED STORMS/POSSIBLE

SUPERCELLS NOW E/SE OF CYS EXPECTED TO CONTINUE ENEWD THIS

EVENING...WITH ADDITIONAL DEVELOPMENT POSSIBLE ON SRN END AS

UPSTREAM NEG TILT SHORTWAVE TROUGH CONTINUES ENEWD.  MCS WILL SOON

ENCOUNTER LESS DEEPLY MIXED/SLIGHTLY MORE MOIST BOUNDARY LAYER

ENVIRONMENT ACROSS NE CO/THE NEB PANHANDLE...WHERE LOW LEVEL WINDS

WILL REMAIN BACKED TO SELY.  THUS...POTENTIAL WILL EXIST FOR

POSSIBLE TORNADOES IN ADDITION TO BOWING SEGMENTS WITH STRAIGHT LINE

WINDS/HAIL.



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

SURFACE AND ALOFT TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE

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

400. MEAN STORM MOTION VECTOR 21040.





...CORFIDI

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