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WWUS20 KWNS 052357

SEL2

SPC WW 052357

COZ000-060600-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 602

NWS STORM PREDICTION CENTER NORMAN OK

600 PM MDT TUE JUL 5 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       NORTHEAST COLORADO



EFFECTIVE THIS TUESDAY NIGHT FROM 600 PM UNTIL MIDNIGHT MDT.



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 60

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

SIDNEY NEBRASKA TO 40 MILES SOUTH OF AKRON COLORADO.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU2).



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 600...WW 601...



DISCUSSION...MOIST UPSLOPE FLOW ON SRN EDGE OF THE WLYS EXPECTED TO

SUPPORT DEVELOPMENT OF A CLUSTER OF STRONG TO SVR STORMS IN NE CO

AND THE SRN NEB PANHANDLE LATER THIS EVE.  AREA THERMODYNAMIC AND

WIND ENVIRONMENT SUGGEST LIKELIHOOD FOR LOCALLY DMGG WIND AND SVR

HAIL AS THE CLUSTERS MOVE/DEVELOP E TOWARD THE LWR PLNS LATER THIS

EVE.



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 550. MEAN STORM

MOTION VECTOR 28020.





...CORFIDI

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