Wikipedia
Varpulis
Varpulis is an ancient deity known in Czech Republic, Slovakia, Lithuania, and Croatia. According to the mythology, he is a god of storm winds and companion of the thunder god Perun or Pyerun, running alongside his chariot. His breath was said to cause the noises heard during storms.
He is sometimes also known or equated with the deity Erishvorsh, or Erivorsh.