We 're not calling for any frost until after the weekend when it starts to cool off in northwestern Alberta after the weekend probably Monday or Tuesday , " meteorologist Gerald Machnee told Reuters .
<response> We 're not calling for any frost until after the weekend when it starts to cool off in northwestern <location>Alberta</location> after the weekend probably Monday or Tuesday , " meteorologist <person>Gerald Machnee</person> told <organization>Reuters</organization> . </response>