

000 

WWUS20 KWNS 142135

SEL0

SPC WW 142135

COZ000-150400-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 830

NWS STORM PREDICTION CENTER NORMAN OK

335 PM MDT THU AUG 14 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       EASTERN COLORADO



EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 335 PM UNTIL

1000 PM 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 65

STATUTE MILES EAST AND WEST OF A LINE FROM 35 MILES SOUTHWEST OF

SPRINGFIELD COLORADO TO 60 MILES NORTH OF AKRON COLORADO.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU0).



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 828...WW 829...



DISCUSSION...STORMS DEVELOPING OVER HIGHER TERRAIN OF ERN CO AND

SERN WY WILL INCREASE IN INTENSITY AS THEY MOVE SEWD INTO MDTLY

UNSTABLE AND FAVORABLY SHEARED ENVIRONMENT. WITH 30-35 KT OF VEERING

SHEAR PROFILES IN PLACE...SUPERCELLS WILL BE POSSIBLE ENHANCING BOTH

THE SEVERE HAIL AND DAMAGING WIND POTENTIAL ACROSS PLAINS OF ERN CO

THRU THIS EVENING.



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 500. MEAN STORM

MOTION VECTOR 32025.





...HALES

