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574 

WWUS20 KWNS 071954

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SPC WW 071954

COZ000-080100-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 454

NWS STORM PREDICTION CENTER NORMAN OK

155 PM MDT THU AUG 7 2014



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  EASTERN COLORADO



* EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 155 PM UNTIL

  700 PM MDT.



* PRIMARY THREATS INCLUDE...

  ISOLATED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE

  ISOLATED LARGE HAIL EVENTS TO 1.5 INCHES IN DIAMETER POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 75

STATUTE MILES EAST AND WEST OF A LINE FROM 50 MILES NORTH

NORTHWEST OF AKRON COLORADO TO 45 MILES EAST SOUTHEAST OF

TRINIDAD COLORADO.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU4).



PRECAUTIONARY/PREPAREDNESS ACTIONS...



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.



&&



DISCUSSION...STRONG/LOCALLY SEVERE STORMS ARE FORECAST TO CONTINUE

DEVELOPING ACROSS PARTS OF EASTERN COLORADO THIS AFTERNOON...WITH

SOME POTENTIAL FOR LOCAL/UPSCALE GROWTH INTO AN MCS BY EARLY

EVENING.  GIVEN THE DEGREE OF INSTABILITY EAST OF THE FRONT RANGE

AND 0-6 KM BULK SHEAR AROUND 30 KT...A FEW CELLS WITH MID-LEVEL

ROTATION WILL BE POSSIBLE -- WITH ASSOCIATED RISK FOR HAIL AND/OR

LOCALLY DAMAGING WINDS.  WIND RISK COULD INCREASE A BIT LATER THIS

AFTERNOON/EARLY EVENING...PRESUMING THE AFOREMENTIONED CONGEALING OF

STORMS INTO A FORWARD-PROPAGATING LINE.



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

TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM

MOTION VECTOR 26030.





...GOSS

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