

000 

WWUS20 KWNS 272159

SEL9

SPC WW 272159

COZ000-280400-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 459

NWS STORM PREDICTION CENTER NORMAN OK

355 PM MDT WED JUN 27 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       SOUTH CENTRAL COLORADO



EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 355 PM UNTIL

1000 PM MDT.



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 60

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

COLORADO SPRINGS COLORADO TO 25 MILES SOUTHWEST OF TRINIDAD

COLORADO.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU9).



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 456...WW 457...WW 458...



DISCUSSION...STORMS RECENTLY DEVELOPED OVER THE HIGHER

TERRAIN...NORTH OF COLORADO SPRINGS...AND ARE EXPECTED TO MOVE

MOSTLY SWD ALONG CONVERGENCE/UPSLOPE FLOW LOCATED NEAR THE

FOOTHILLS/I-25 CORRIDOR. ALTHOUGH THE VERTICAL WINDS ARE NOT

PARTICULARLY STRONG...STRONG DIRECTIONAL SHEAR MAY SUPPORT SOME MID

LEVEL ROTATION. ALTHOUGH A BRIEF TORNADO MAY BE POSSIBLE WITH

INITIAL STORM...STRONG OUTFLOWS ARE EXPECTED TO PROPEL STORMS SWD

WITH WIND DAMAGE AND HAIL THE MAIN THREATS.



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 500. MEAN STORM

MOTION VECTOR 34015.





...IMY

