WW 458 SEVERE TSTM CO KS NE 012210Z – 020400Z
URGENT - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WATCH NUMBER 458 NWS STORM PREDICTION CENTER NORMAN OK 410 PM MDT THU AUG 1 2013 THE NWS STORM PREDICTION CENTER HAS ISSUED A * SEVERE THUNDERSTORM WATCH FOR PORTIONS OF NORTHEAST COLORADO NORTHWEST KANSAS EXTREME SOUTHWEST NEBRASKA * EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 410 PM UNTIL 1000 PM MDT. * PRIMARY THREATS INCLUDE... SEVERAL DAMAGING WIND GUSTS TO 70 MPH POSSIBLE SEVERAL LARGE HAIL EVENTS TO 1.5 INCHES IN DIAMETER POSSIBLE THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 75 STATUTE MILES EAST AND WEST OF A LINE FROM 60 MILES NORTH OF AKRON COLORADO TO 45 MILES SOUTH OF BURLINGTON COLORADO. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU8). 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. && OTHER WATCH INFORMATION...CONTINUE...WW 454...WW 455...WW 456...WW 457... DISCUSSION...STORMS MOVING E OF THE FRONT RANGE ON CONVECTIVE OUTFLOW WILL LIKELY CONTINUE FOR THE NEXT FEW HOURS WHILE SPREADING INTO A MODERATELY UNSTABLE ENVIRONMENT ACROSS NE CO. OTHER STORM DEVELOPMENT IS ALSO EXPECTED ACROSS NW KS SHORTLY. THE COMBINATION OF INSTABILITY AND VERTICAL SHEAR IS SUFFICIENT FOR A RISK OF ORGANIZED STORMS CAPABLE OF PRODUCING DAMAGING GUSTS AND LARGE HAIL. AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM MOTION VECTOR 30020. ...THOMPSON
via SPC Forecast Products http://www.spc.noaa.gov/products/watch/ww0458.html
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