WW 215 SEVERE TSTM CO KS NE 242040Z – 250400Z
URGENT - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WATCH NUMBER 215 NWS STORM PREDICTION CENTER NORMAN OK 240 PM MDT FRI MAY 24 2013 THE NWS STORM PREDICTION CENTER HAS ISSUED A * SEVERE THUNDERSTORM WATCH FOR PORTIONS OF EASTERN COLORADO WESTERN KANSAS SOUTHWEST NEBRASKA AND THE SOUTHERN PANHANDLE * EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 240 PM UNTIL 1000 PM MDT. * PRIMARY THREATS INCLUDE... SEVERAL LARGE HAIL EVENTS WITH A FEW VERY LARGE HAIL EVENTS TO 2 INCHES IN DIAMETER POSSIBLE SEVERAL DAMAGING WIND GUSTS TO 70 MPH POSSIBLE A FEW TORNADOES POSSIBLE THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 65 STATUTE MILES EAST AND WEST OF A LINE FROM 5 MILES WEST SOUTHWEST OF LIBERAL KANSAS TO 40 MILES NORTH NORTHEAST OF SIDNEY NEBRASKA. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU5). PRECAUTIONARY/PREPAREDNESS ACTIONS... 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. && DISCUSSION...WIDELY SCATTERED TSTMS ARE EXPECTED TO DEVELOP THIS AFTERNOON AND EVENING FROM THE VICINITY OF A SURFACE LOW OVER NERN CO SWD ALONG A LEE TROUGH/DRYLINE. AMBIENT ENVIRONMENT IS CHARACTERIZED BY STEEP LAPSE RATES...MLCAPE OF 1000-2000 J/KG...AND VERTICALLY VEERING WIND PROFILES WITH STEADILY STRENGTHENING DEEP-LAYER SHEAR. AS SUCH...THE POTENTIAL WILL EXIST FOR SUPERCELLS AS THE INITIAL STORM MODE WITH A RISK FOR LARGE HAIL AND PERHAPS A TORNADO. UPSCALE GROWTH OF STORMS INTO CLUSTERS IS ANTICIPATED LATER THIS EVENING WITH AN INCREASED THREAT FOR DAMAGING WINDS. 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 23020. ...MEAD
via SPC Forecast Products http://www.spc.noaa.gov/products/watch/ww0215.html
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