

327 

WWUS20 KWNS 050551

SEL0

SPC WW 050551

NEZ000-051300-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 260

NWS STORM PREDICTION CENTER NORMAN OK

1240 AM CDT SAT JUN 5 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       A LARGE PART OF NEBRASKA



EFFECTIVE THIS SATURDAY MORNING FROM 1240 AM UNTIL 800 AM CDT.



HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70

MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 50

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 70 MILES WEST OF

MULLEN NEBRASKA TO 25 MILES EAST NORTHEAST OF COLUMBUS NEBRASKA.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU0).



REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE

FAVORABLE FOR 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. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY

DO PRODUCE TORNADOES.



OTHER WATCH INFORMATION...CONTINUE...WW 258...WW 259...



DISCUSSION...SLIGHTLY ELEVATED TSTMS NOW FORMING ALONG A WNW/ESE

AXIS ACROSS CNTRL/NRN NEB EXPECTED TO PERSIST THROUGH LATER THIS

MORNING AS REGION IS GLANCED BY UPR DIVERGENCE AND LOW LVL WAA

ASSOCIATED WITH LOW AMPLITUDE DISTURBANCES MOVING E FROM THE

CNTRL/NRN RCKYS.  AMPLE ELEVATED CAPE AND SHEAR APPEAR PRESENT TO

SUPPORT SUSTAINED STORMS/POSSIBLE SUPERCELLS WITH HAIL

AND...POSSIBLY...DMGG WIND.



AVIATION...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 28035.





...CORFIDI

