A Study of Extratropical Cyclone over Oceans Near Australia in the Southern Winter

Using GMS IR images and conventional and grid data over the southern Hemisphere during the winters of 1990~1992, the initiating regions and tracks of extratropical cyclones in each of months are investigated and four composite models of cloud patterns evolution for extratropical cyclone generating, developing and weakening are summarized. A primary method of estimating its center pressure is provided.