

664 

WWUS20 KWNS 062228

SEL6

SPC WW 062228

OKZ000-TXZ000-070400-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 556

NWS STORM PREDICTION CENTER NORMAN OK

525 PM CDT MON JUL 6 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       OKLAHOMA PANHANDLE

       TEXAS PANHANDLE



EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 525 PM UNTIL

1100 PM CDT.



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 60

STATUTE MILES EAST AND WEST OF A LINE FROM 5 MILES WEST NORTHWEST

OF ELKHART KANSAS TO 45 MILES SOUTH OF LUBBOCK TEXAS.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU6).



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 553...WW 554...WW 555...



DISCUSSION...STORMS MOVING SEWD ACROSS SERN CO AND NERN NM ARE

EXPECTED TO SPREAD/DEVELOP INTO THE TX/OK PANHANDLES...AHEAD OF AN

UPPER WAVE MOVING SEWD THROUGH CO. DEEP LAYER SHEAR AT 30-40

KT...STEEP LAPSE RATES AND MLCAPES BETWEEN 1000-1500 J/KG SHOULD BE

SUPPORTIVE OF SEVERE HAIL. HOWEVER...IF STORM OUTFLOWS CAN

CONSOLIDATE INTO AN MCS...THE NWLY WINDS ALOFT WOULD BECOME MORE

SUPPORTIVE OF A DAMAGING WIND THREAT.



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 500. MEAN STORM

MOTION VECTOR 33020.





...IMY

