

746 

WWUS20 KWNS 180204

SEL2

SPC WW 180204

IAZ000-NEZ000-180800-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 452

NWS STORM PREDICTION CENTER NORMAN OK

905 PM CDT WED JUN 17 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       SOUTHWEST IOWA

       SOUTH CENTRAL AND SOUTHEAST NEBRASKA



EFFECTIVE THIS WEDNESDAY NIGHT AND THURSDAY MORNING FROM 905 PM

UNTIL 300 AM 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 55 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 15 MILES WEST OF KEARNEY

NEBRASKA TO 10 MILES EAST NORTHEAST OF SHENANDOAH IOWA.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU2).



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 440. WATCH NUMBER 440 WILL NOT BE IN EFFECT AFTER

905 PM CDT. CONTINUE...WW 441...WW 443...WW 445...WW 446...WW

447...WW 448...WW 449...WW 450...WW 451...



DISCUSSION...ISOLATED SEVERE/SUPERCELL STORMS CONTINUE ACROSS PARTS

OF CENTRAL NEB.  GIVEN FAVORABLY-UNSTABLE AIRMASS IN PLACE AND AN

INCREASING SLY LOW-LEVEL JET...STORMS SHOULD CONTINUE SPREADING

EWD/SEWD WITH TIME...AFFECTING PARTS OF SOUTHEAST NEBRASKA AND

EVENTUALLY SOUTHWEST IA OVER THE NEXT SEVERAL HOURS.  ALONG WITH THE

POTENTIAL FOR LARGE HAIL AND DAMAGING WINDS...ISOLATED TORNADOES

WILL BE POSSIBLE.



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 28530.





...GOSS

