sh ore ▁wind s ▁that ▁character ist ically ▁swe ep ▁across ▁Southern ▁California ▁and ▁northern ▁B aja ▁California ▁during ▁late ▁fall ▁into ▁winter ▁season . ▁They ▁range ▁from ▁hot ▁to ▁cold , ▁depending ▁on ▁the ▁prev ail ing ▁temper atures ▁in ▁the ▁source ▁region , ▁the ▁Great ▁Bas in ▁and ▁upper ▁M oj ave ▁Des ert . ▁Nevertheless , ▁the ▁wind s ▁are ▁not orious ▁for ▁causing ▁hot , ▁dry ▁weather ▁due ▁to ▁compression al ▁he ating ▁of ▁the ▁lower ▁atmosphere . ▁ ▁Notable ▁Santa ▁Ana ▁wind st orm s ▁happen ▁several ▁times ▁a ▁year ▁between ▁fall ▁and ▁spring . ▁Once ▁every ▁several ▁years ▁a ▁strong ▁wind st orm ▁causes ▁significant ▁damage , ▁to pp ling ▁or ▁up root ing ▁large ▁old ▁trees ▁and ▁dam aging ▁structures ▁across ▁the ▁region . ▁ ▁He avy ▁R ains , ▁Land sl ides , ▁and ▁Deb ris ▁Flow s ▁While ▁overall ▁precip itation ▁is ▁low , ▁the ▁rain ▁that ▁does ▁fall ▁occasionally ▁comes ▁in ▁brief ▁heavy ▁storm s . ▁Com b ined ▁with ▁ste ep ▁mountain ▁s lop es ▁and ▁recent ▁burn ▁areas ▁from ▁wild f ires , ▁these ▁heavy ▁ra ins ▁often ▁cause ▁land sl ides ▁and ▁de br is ▁flows ▁in ▁fo oth ill ▁areas , ▁dam aging ▁structures ▁and ▁blocking ▁roads . ▁ ▁Th under st orm s , ▁Light ning , ▁and ▁T orn ado es ▁Text book ▁cum ul on im bus - formed ▁summer ▁th under st orm s ▁are ▁fairly ▁rare ▁in ▁Los ▁Angeles , ▁because ▁the ▁atmosphere ▁over