orographic tramontane xQfn chinooks mistral gust gusts winters windy sirocco panemone humid shear shamal summers Thermia kaze VAWT 51QdgC Eolica Penibetico desiccating dry chill muggy bise hot leeward Chivela 37QdgF Tramuntana 9QdgF Habagat HAWT Eurus precipitation humidity