

097 

WWUS20 KWNS 142328

SEL1

SPC WW 142328

NEZ000-150700-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 171

NWS STORM PREDICTION CENTER NORMAN OK

630 PM CDT SAT APR 14 2012



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       CENTRAL AND SOUTHEAST NEBRASKA



EFFECTIVE THIS SATURDAY NIGHT AND SUNDAY MORNING FROM 630 PM

UNTIL 200 AM CDT.



...THIS IS A PARTICULARLY DANGEROUS SITUATION...



DESTRUCTIVE TORNADOES...LARGE 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 50 STATUTE

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

NEBRASKA TO 40 MILES SOUTH OF OMAHA NEBRASKA.  FOR A COMPLETE

DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE

(WOUS64 KWNS WOU1).



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 166...WW 167...WW

169...WW 170...



DISCUSSION...SURFACE LOW N OF GLD WILL DEVELOP NEWD INTO CNTRL NEB

TONIGHT WITH AN ASSOCIATED WARM FRONT/OUTFLOW BOUNDARY LIFTING NWD

THROUGH S-CNTRL/SERN NEB.  THE RETREAT OF THIS BOUNDARY WILL

COINCIDE WITH THE WRN EXTENSION OF A 50+ KT SLY LLJ WHICH WILL

ENHANCED VERTICAL SHEAR AND AIR MASS DESTABILIZATION.  AS

SUCH...ENVIRONMENT IS EXPECTED TO REMAIN SUPPORTIVE OF SUPERCELLS

CAPABLE OF TORNADOES /SOME SIGNIFICANT/ AND LARGE HAIL.



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

450. MEAN STORM MOTION VECTOR 24035.





...MEAD

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