article_snippet.sent: It all depends on exactly where it forms.
article_snippet.sent: but the actual intensity of these things is impossible to predict,' Mr White says. '
article_snippet.sent: Mr White told Daily Mail Australia: 'It forms occasionally, usually once a year.
article_snippet.sent: ‘this particular one is probably the strongest since 2007 and this particular one is also going to be the longest lasting one,Mr White said.