« Back to Glossary IndexAn elongated area of high pressure in the atmosphere. Opposite of a trough.Related Articles:Severe pulse storms SE Australia - Storms continue November 2009December heat wave and bushfire weather returnVery dry and hot - 41C at nearby PenrithSome storm action todayNorthern NSW / SE QLD Flood Disaster : 18th - 30th January 2011« Back to Glossary Index