Direction of spark discharge, like arc discharge, also possible change by air flow - wind, shock wave, blast wave, pressure wave. Rakov, Uman - Lightning: Physics and effects, chapter 8 "Winter lightning in Japan" p. 313: "Interestingly, Ishii et al. (1998) observed that subsequent strokes in multiple-stroke positive flashes in winter storms in Japan always create a new termination on ground." Something like that may appear not only in winter and not only in Japan.
Mwelekeo wa kutokwa cheche, kama safu ya usaha, pia inawezekana mabadiliko ya hewa na kati yake - upepo, mshtuko wimbi, mlipuko wimbi, shinikizo wimbi. Rakov, Uman - umeme: Fizikia na madhara, sura ya 8 "Winter umeme nchini Japan" uk. 313: ". Kushangaza, Ishii et al (1998) aliona kwamba baadae viboko katika flashes nyingi-kiharusi chanya katika dhoruba wakati wa baridi Japan zote huleta kuondoa mpya juu ya ardhi." Kitu kama hicho inaweza kuonekana si tu katika majira ya baridi na si tu katika Japan.