

058 

WWUS20 KWNS 191030

SEL9

SPC WW 191030

KSZ000-NEZ000-191800-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 349

NWS STORM PREDICTION CENTER NORMAN OK

530 AM CDT SAT JUN 19 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       NORTHERN KANSAS

       SOUTH CENTRAL NEBRASKA



EFFECTIVE THIS SATURDAY MORNING AND AFTERNOON FROM 530 AM UNTIL

100 PM 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 80

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

NORTHWEST OF GRAND ISLAND NEBRASKA TO 45 MILES EAST OF HILL CITY

KANSAS.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED

WATCH OUTLINE UPDATE (WOUS64 KWNS WOU9).



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 348...



DISCUSSION...SW NEB MCS HAS BEGUN TO SHOW SOME FORWARD /ESEWD/

PROPAGATION IN THE PAST HOUR OR SO.  THIS MOST LIKELY REFLECTS

VWP-OBSERVED VEERING OF MOIST LLJ INTO N CNTRL KS/S CNTRL NEB.  IF

FORWARD DEVELOPMENT CONTINUES...CONVECTIVE SYSTEM COULD PRODUCE DMGG

WIND AND HAIL AS UPDRAFTS ARE FED BY INCREASINGLY MOIST AND WARM

INFLOW WITH EWD EXTENT.



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 28030.





...CORFIDI

