The
号 reading is literary and survives mainly in fixed compounds:
号叫 (to howl),
号哭 (to wail),
号啕大哭 (to bawl uncontrollably),
哀号 (to wail in grief), and the classical line
北风怒号 (the north wind howls in rage). In everyday spoken Chinese, ordinary crying uses
哭 rather than
号.