NearCAST guidance continues to support the enhancement of thunderstorm development from Jim Hogg and Starr counties.  It’s appears the model indicated a weak disturbance increasing Theta E across forecast area between 01Z and 04Z, which will add to the existing unstable conditions.  Severe thunderstorm potential remains high.  Emergency managers and other decision makers are strongly encouraged to prepare for the threat of severe weather through 05Z.  Isolated tornadoes are still possible.  rn/ams