Abstract: One of many studies by the Systems Development Office of the National Weather Service in support of the Automation of Field operations and Services (AFOS) Program is the External User Study. This study is directed at the ...

Abstract: Data from three recent winters are utilized to study the large changes in the temperature and flow fields at 50 mb. It is reasoned that the major changes in this region arise from the development of an unstable flow pattern ...

Abstract: The flow at 500 mb. is compared with that at 100 mb. With the exception of the polar vortex, the patterns at the two levels tend to show a distinct similarity, with the major exception that small-scale features at 500 mb. ...