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WWUS20 KWNS 061922

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SPC WW 061922

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URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 553

NWS STORM PREDICTION CENTER NORMAN OK

120 PM MDT MON JUL 6 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       THE SOUTHEAST QUARTER OF COLORADO

       NORTH CENTRAL AND NORTHEASTERN NEW MEXICO



EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 120 PM UNTIL 800

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 90

STATUTE MILES EAST AND WEST OF A LINE FROM 10 MILES NORTHEAST OF

COLORADO SPRINGS COLORADO TO 75 MILES SOUTHWEST OF TUCUMCARI NEW

MEXICO.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED

WATCH OUTLINE UPDATE (WOUS64 KWNS WOU3).



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...SHOWERS AND THUNDERSTORMS CONTINUE TO DEVELOP ACROSS

THE CENTRAL AND SRN ROCKIES...AND HAVE BEGUN TO SPREAD SEWD INTO THE

HIGH PLAINS...WHERE DEWPOINTS NEAR 60 AND DAYTIME HEATING HAVE

COMBINED TO PUSH MIXED-LAYER CAPE INTO THE 500 TO 1000 J/KG RANGE.

WHILE MID-LEVEL FLOW REMAINS SOMEWHAT WEAK FROM THE NW...LOW-LEVEL

SUFFICIENT FOR ORGANIZED/WEAKLY-ROTATING STORMS.  ALONG WITH LARGE

HAIL...LOCALLY STRONG/GUSTY WINDS WILL BE POSSIBLE AS CONVECTION

ORGANIZES/SPREADS SEWD INTO THE HIGH PLAINS THROUGH THE AFTERNOON.



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 450. MEAN STORM

MOTION VECTOR 30025.





...GOSS

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