

925 

WWUS20 KWNS 080334

SEL3

SPC WW 080334

NEZ000-081200-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 283

NWS STORM PREDICTION CENTER NORMAN OK

1035 PM CDT MON JUN 7 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       CENTRAL AND EASTERN NEBRASKA



EFFECTIVE THIS MONDAY NIGHT AND TUESDAY MORNING FROM 1035 PM

UNTIL 700 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 75

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 35 MILES SOUTHWEST

OF BROKEN BOW NEBRASKA TO 45 MILES EAST NORTHEAST OF LINCOLN

NEBRASKA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU3).



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 281...WW 282...



DISCUSSION...A BOWING MCS APPEARS TO BE IN ITS FORMATIVE STAGES

ACROSS CENTRAL NEB WHERE SEVERAL STORMS HAVE MERGED WITH A LARGE HP

SUPERCELL...WITH THE MAIN SURGE DEVELOPING AS PART OF THE REAR-FLANK

GUST FRONT WITH THE SUPERCELL.  AN EXPANSION AND ESEWD PROGRESSION

OF THIS SYSTEM IS EXPECTED OVERNIGHT ALONG THE WNW-ESE ORIENTED

SURFACE FRONT AND ON THE NOSE OF STRONG LLJ...WITH A STRONG COLD

POOL MAINTAINED BY THE UPSTREAM CONVECTION IN SW NEB.  THE DAMAGING

WIND THREAT WILL INCREASE THE NEXT FEW HOURS...WHILE LARGE HAIL CAN

ALSO BE EXPECTED WITH THE STRONGER EMBEDDED STORMS.



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 29035.





...THOMPSON

