

547 

WWUS20 KWNS 100818

SEL0

SPC WW 100818

NEZ000-101600-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 290

NWS STORM PREDICTION CENTER NORMAN OK

320 AM CDT THU JUN 10 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       CENTRAL AND NORTHERN NEBRASKA



EFFECTIVE THIS THURSDAY MORNING FROM 320 AM UNTIL 1100 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 65

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 5 MILES WEST

SOUTHWEST OF ALLIANCE NEBRASKA TO 25 MILES EAST SOUTHEAST OF

NORFOLK 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 289...



DISCUSSION...DEVELOPING FORWARD-PROPAGATING MCS IN NW NEB EXPECTED

TO MOVE ESE AT 35-40TS THROUGH MID MORNING...WITH ADDITIONAL MORE

SCTD STORMS CONTINUING TO FORM E OF SYSTEM ACROSS CNTRL/E CNTRL NEB.

 STRENGTH AND BREADTH OF GRADUALLY VEERING SWLY LLJ...AND QUALITY OF

MOISTURE...SUGGEST POTENTIAL FOR EMBEDDED SUPERCELLS AND BOWING

SEGMENTS WITH LARGE HAIL/HIGH 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 550. MEAN STORM

MOTION VECTOR 29035.





...CORFIDI

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