

000 

WWUS20 KWNS 232011

SEL5

SPC WW 232011

COZ000-240300-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 165

NWS STORM PREDICTION CENTER NORMAN OK

210 PM MDT MON APR 23 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       EASTERN COLORADO



EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 210 PM UNTIL 900

PM MDT.



TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND

GUSTS TO 60 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE

AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 70 STATUTE

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

AKRON COLORADO TO 40 MILES WEST SOUTHWEST OF SPRINGFIELD

COLORADO.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU5).



REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR

TORNADOES AND 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.



DISCUSSION...TSTMS EXPECTED TO DEVELOP OVER THE NEXT HOUR OR SO IN

INCREASINGLY MOIST/UPSLOPE FLOW INVOF DENVER CYCLONE OVER E CNTRL

CO.  OTHER STORMS MAY FORM OVER THE FOOTHILLS AND MOVE/DEVELOP EWD.

BACKED LOW LEVEL WINDS AND EXPECTED DISCRETE TO SEMI-DISCRETE NATURE

OF STORMS SUGGEST POTENTIAL FOR TORNADOES IN ADDITION TO HAIL.  SOME

OF THE STORMS MAY STRENGTHEN AND CONSOLIDATE INTO A CLUSTER OR TWO

THIS EVENING AS SHEAR/LARGE SCALE ASCENT INCREASE AHEAD OF

EWD-MOVING GRT BASIN UPR LOW.



AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL

SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 50 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

400. MEAN STORM MOTION VECTOR 21030.





...CORFIDI

