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WWUS20 KWNS 310027

SEL1

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COZ000-KSZ000-NEZ000-310600-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 541

NWS STORM PREDICTION CENTER NORMAN OK

630 PM MDT MON JUL 30 2012



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       EASTERN COLORADO

       NORTHWEST KANSAS

       FAR SOUTHWEST NEBRASKA



EFFECTIVE THIS MONDAY NIGHT FROM 630 PM UNTIL MIDNIGHT MDT.



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 55

STATUTE MILES EAST AND WEST OF A LINE FROM 65 MILES NORTH OF

GOODLAND KANSAS TO 40 MILES SOUTH OF GOODLAND KANSAS.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU1).



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 540...



DISCUSSION...MCS WITH A HISTORY OF DAMAGING WINDS CONTINUES TO

ORGANIZE THIS EVENING OVER THE HIGH PLAINS OF NERN CO WITHIN A STEEP

LAPSE RATE ENVIRONMENT WITH MLCAPE OF 1000-2000 J/KG.  GIVEN THE 40

KT MIDLEVEL FLOW OBSERVED BY 00Z DENVER SOUNDING AND ELY LOW-LEVEL

WINDS...KINEMATIC ENVIRONMENT WILL BE SUPPORTIVE OF FORWARD

PROPAGATION OF MCS WITH THE THREAT FOR DAMAGING WINDS SPREADING EWD

ACROSS THE WATCH AREA.



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 27030.





...MEAD

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