

865 

WWUS20 KWNS 312004

SEL8

SPC WW 312004

COZ000-KSZ000-NMZ000-OKZ000-TXZ000-010300-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 238

NWS STORM PREDICTION CENTER NORMAN OK

305 PM CDT MON MAY 31 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       SMALL PART OF SOUTHEAST COLORADO

       PARTS OF SOUTHWEST KANSAS

       SMALL PART OF NORTHEAST NEW MEXICO

       OKLAHOMA PANHANDLE

       PARTS OF THE TEXAS PANHANDLE



EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 305 PM UNTIL

1000 PM CDT.



HAIL TO 2.5 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 110

STATUTE MILES EAST AND WEST OF A LINE FROM 55 MILES NORTH

NORTHWEST OF GARDEN CITY KANSAS TO 25 MILES SOUTHWEST OF DALHART

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

WATCH OUTLINE UPDATE (WOUS64 KWNS WOU8).



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...WITH THE AIR MASS NOW VERY UNSTABLE WITH MLCAPES AOA

2500 J/KG...ALONG WITH STEEP LAPSE RATES AND VEERING SHEAR

PROFILES...SCATTERED THUNDERSTORMS WILL DEVELOP EWD ACROSS THE

WATCH.  PARAMETERS SUPPORT SUPERCELLS...WITH PRIMARILY A LARGE HAIL

THREAT GIVEN THE MARGINAL DEEP LAYER SHEAR.



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

TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

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

MOTION VECTOR 27015.





...HALES

