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WWUS20 KWNS 082156

SEL6

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IAZ000-KSZ000-MOZ000-NEZ000-090600-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 566

NWS STORM PREDICTION CENTER NORMAN OK

455 PM CDT WED AUG 8 2012



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       WESTERN IOWA

       NORTHEAST AND EAST CENTRAL KANSAS

       NORTHWEST AND WEST CENTRAL MISSOURI

       EASTERN NEBRASKA



EFFECTIVE THIS WEDNESDAY AFTERNOON AND THURSDAY MORNING FROM 455

PM UNTIL 100 AM CDT.



HAIL TO 1.5 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 NORTHWEST OF

TEKAMAH NEBRASKA TO 55 MILES SOUTH SOUTHWEST OF OLATHE KANSAS.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU6).



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 565...



DISCUSSION...TSTMS NOW FORMING IN ERN NEB MAY GROW INTO A SMALL

SSE-MOVING MCS OR TWO AS ACTIVITY CONSOLIDATES ALONG CORRIDOR OF AIR

LEFT UNDISTURBED BY MCS NOW TRACKING SE THROUGH CNTRL IA. MODERATE

MID LVL NW FLOW AND SIZABLE LOW LVL TEMP-DEW POINT SPREADS SUGGEST

POTENTIAL FOR WET MICROBURSTS/LOCALLY DMGG WIND AND POSSIBLY SVR

HAIL. OUTFLOW BOUNDARY INTERACTIONS ALSO MAY YIELD A TORNADO OR TWO

GIVEN STEEP LOW LVL LAPSE RATES AND LOW LVL VEERING WIND PROFILES.

BUT ANY SUCH ACTIVITY SHOULD REMAIN SHORT-LIVED.



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 550. MEAN STORM

MOTION VECTOR 33020.





...CORFIDI

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