MESOSCALE DISCUSSION 0839
   NWS STORM PREDICTION CENTER NORMAN OK
   0552 PM CDT FRI MAY 15 2009
   
   AREAS AFFECTED...ERN TX PANHANDLE...WRN/NRN OK...SERN KS
   
   CONCERNING...TORNADO WATCH 307...
   
   VALID 152252Z - 152345Z
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 307 CONTINUES.
   
   AS OF 2245Z...AN EVOLVING QLCS WITH EMBEDDED SUPERCELL STRUCTURES
   STRETCHED FROM NEAR TOP TO GAG WITH GENERAL STORM MOTION AROUND 20
   KTS TO THE ESE. FARTHER SW...AN INTENSE DISCRETE SWD-MOVING
   SUPERCELL WAS LOCATED OVER GRAY COUNTY TX. A VERY STRONG AND BROAD
   MESOCYCLONIC SIGNATURE HAS PERSISTED FOR NEARLY AN HOUR WITH REPORTS
   OF BRIEF TORNADOES AND DAMAGING STRAIGHT-LINE WINDS. AMBIENT
   ENVIRONMENT SHOULD SUPPORT A HIGH LIKELIHOOD OF CONTINUED SEVERE
   THREAT WITH THIS CELL AS IT APPROACHES THE
   WHEELER/DONLEY/COLLINGSWORTH COUNTY AREAS. BY AROUND 2330Z...STORM
   EVOLUTION WILL LIKELY BE DISRUPTED BY ONGOING CONVECTION ACROSS
   BRISCOE/HALL COUNTIES. IN ADDITION...SURFACE DEW POINTS HAVE FALLEN
   INTO THE MIDDLE/UPPER 50S ACROSS THE SERN PANHANDLE AND LOW ROLLING
   PLAINS OF TX. THIS SUGGESTS OVERALL TORNADO THREAT SHOULD TREND
   DOWNWARD WITH TIME.
   
   ELSEWHERE...WITH CONVECTIVE MODE PRIMARILY LINEAR AND STRONGER FLOW
   IN THE KINEMATIC PROFILE GENERALLY RESIDING IN THE LOW-LEVELS /PER
   AREA PROFILERS/ AMIDST A VERY UNSTABLE AIR MASS...SEVERE HAIL/WIND
   SHOULD BE THE PRIMARY THREATS WITH BRIEF TORNADOES POSSIBLE.
   
   ..GRAMS.. 05/15/2009
   
   
   ATTN...WFO...EAX...TSA...TOP...ICT...OUN...DDC...LUB...AMA...
   
   LAT...LON   38749473 37439607 35229919 34429983 34160068 34380107
               35280118 36359991 38019726 38849582 38749473