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663 

WWUS20 KWNS 201338

SEL2

SPC WW 201338

KSZ000-NEZ000-202000-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 522

NWS STORM PREDICTION CENTER NORMAN OK

840 AM CDT MON JUN 20 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       MUCH OF WESTERN KANSAS

       PARTS OF SOUTHERN NEBRASKA



EFFECTIVE THIS MONDAY MORNING AND AFTERNOON FROM 840 AM UNTIL 300

PM CDT.



HAIL TO 2.5 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 60

STATUTE MILES EAST AND WEST OF A LINE FROM 15 MILES WEST OF

LIBERAL KANSAS TO 30 MILES NORTHWEST OF KEARNEY NEBRASKA.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU2).



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 521...



DISCUSSION...UNSEASONABLY STRONG UPPER TROUGH MOVING INTO CENTRAL

HIGH PLAINS PROVIDING UPPER ASCENT FOR ONGOING THUNDERSTORMS MOVING

THRU WRN KS. WITH A MOIST UNSTABLE NELY FLOW...SUFFICIENT

INSTABILITY AND SHEAR FOR SUPERCELLS WHICH WILL INCLUDE VERY LARGE

HAIL AND POSSIBLE WIND DAMAGE.



AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT

TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. MEAN STORM

MOTION VECTOR 21030.





...HALES

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