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067 

WWUS20 KWNS 190656

SEL8

SPC WW 190656

COZ000-NEZ000-191400-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 348

NWS STORM PREDICTION CENTER NORMAN OK

1255 AM MDT SAT JUN 19 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       NORTHEAST COLORADO

       SOUTHWEST NEBRASKA



EFFECTIVE THIS SATURDAY MORNING FROM 1255 AM UNTIL 800 AM MDT.



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 60 MILES WEST

SOUTHWEST OF SIDNEY NEBRASKA TO 25 MILES NORTHEAST OF NORTH

PLATTE NEBRASKA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU8).



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 347...



DISCUSSION...ELEVATED TSTMS NOW FORMING ON NOSE OF WRN BRANCH OF

S-SELY LLJ EXPECTED TO PERSIST THROUGH DAWN.  ACTIVITY MAY

MOVE/DEVELOP NEWD WITH TIME...AHEAD OF WEAK UPR IMPULSE MOVING NEWD

FROM CNTRL CO /PER WV IMAGERY AND GFS-ECMWF FCSTS/.  SUFFICIENT

ELEVATED CAPE SHOULD BE PRESENT TO SUPPORT LARGE HAIL AND POSSIBLY

HIGH WIND IN STRONGER/MORE SUSTAINED STORMS...WITH ACTIVITY POSSIBLY

EVOLVING INTO A SMALL CLUSTER.



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 25025.





...CORFIDI

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