if (substr(g,0,2) is "WS" ) {
      rename(g,windShearPresent);
      group g : dump; non_alpha na;
      if (g is "ALL") {
          rename(g,windShear);
          group g : dump; non_alpha na;
          if (g is "RWY") {
            rename(g,rwy);
            modify rwy : hidden;
            group g : dump; non_alpha na;
          }
      } else {
        rename(g,windShear);
        group g : dump; non_alpha na;
      }
  }