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URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 622

NWS STORM PREDICTION CENTER NORMAN OK

320 PM CDT WED SEP 5 2012



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       FAR EASTERN NEW MEXICO

       CENTRAL AND EASTERN OKLAHOMA PANHANDLE

       THE TEXAS PANHANDLE AND TEXAS SOUTH PLAINS



EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 320 PM UNTIL

1100 PM CDT.



HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 75

MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 80

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 75 MILES EAST OF

BORGER TEXAS TO 25 MILES NORTH NORTHWEST OF CANNON AFB NEW

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

WATCH OUTLINE UPDATE (WOUS64 KWNS WOU2).



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 619...WW 620...WW 621...



DISCUSSION...TSTMS NOW FORMING IN DEEPLY MIXED ENVIRONMENT OVER THE

TX SOUTH PLNS EXPECTED TO BE JOINED BY ADDITIONAL DEVELOPMENT LATER

THIS AFTN ALONG AND AHEAD OF NW TX PANHANDLE COLD FRONT. MODEST

WNWLY DEEP SHEAR ON SRN EDGE OF THE WLYS AND STEEP LOW TO MID-LVL

LAPSE RATES MAY YIELD STORMS WITH SVR WIND/HAIL. ACTIVITY MAY EVOLVE

INTO A S OR SE-MOVING CLUSTER THIS EVE AS SLY LLJ STRENGTHENS.



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

TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 65

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. MEAN STORM

MOTION VECTOR 29020.





...CORFIDI

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