

106 

WWUS20 KWNS 022121

SEL6

SPC WW 022121

COZ000-030400-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 586

NWS STORM PREDICTION CENTER NORMAN OK

425 PM CDT SAT JUL 2 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       LARGE PART OF EASTERN COLORADO



EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 425 PM UNTIL

1100 PM CDT.



HAIL TO 2.5 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 70

STATUTE MILES EAST AND WEST OF A LINE FROM 60 MILES NORTH

NORTHWEST OF AKRON COLORADO TO 65 MILES SOUTH SOUTHEAST OF LIMON

COLORADO.  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 583...WW 584...WW 585...



DISCUSSION...SHEAR/CAPE PROFILES SUPPORT SUPERCELL DEVELOPMENT

MOVING EWD FROM THE FRONT RANGE THIS AFTERNOON/EVENING.  PRIMARY

THREAT WILL BE LARGE HAIL AND DAMAGING DOWNBURSTS.  HOWEVER THERE IS

THE POSSIBILITY OF AT LEAST ISOLATED TORNADOES BY LATER THIS

AFTERNOON/EVENING WITH SUPERCELLS MOVING EWD ACROSS THE PLAINS WHERE

SEVERE PARAMETERS SHOULD BE GREATER.



AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT

TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. MEAN STORM

MOTION VECTOR 27020.





...HALES

