A low pressure system will continue its trek across the southwestern US Sunday. This will bring a chance of rain or snow showers and a few thunderstorms across southeastern Colorado. Area temperatures will be a few degrees cooler, but close to average in most areas. Expect highs in the low 70s over the eastern plains, mid 60's across the San Luis Valley, and 40s to low 50s across the high country. (Please visit http://weather.gov/pub for more information.)