This project used local linear diagnostics, along with a Lorenz-curve based technique, to investigate the forecast uncertainty dynamics in the SH extratropics for model runs from January 1st, 2012 to February 29th, 2012. While results varied depending on the ensemble model, the areas of larger uncertainty tended to form areas of higher uncertainty where high frequency (synoptic scale) and low frequency transients were present. Spatial analysis showed that while the ensembles effectively captured the general characteristics of the uncertainty, the spread of the ensembles generally underestimated the magnitude and shape of the areas of larger uncertainty as forecast times increased. Also, the bias of these ensembles indicated that there may be systematic errors that grew as forecast times increased due to errors in predicting low frequency changes in the large scale flow. The results were similar to what has been found in the NH extratropics, despite the SH extratropics having primarily zonal flow during the time period investigated.