The National Weather Service (NWS) has begun the limited deployment and implementation of the Advanced Weather Interactive Processing System (AWIPS) at a number of field offices. This process is at the heart of the NWS' Stage 2 modernization effort. The intent is to begin the commissioning of AWIPS as the primary communications and processing system at all field offices beginning in 1998 with the advent of software build 4. AWIPS will be the primary integrator of all data products and services at all field sites. As such, the goal of the legacy-to-AWIPS transition planning process is to provide an approach that delineates the steps that must be accomplished before the decommissioning of systems being replaced by AWIPS can occur. Since AWIPS will consolidate the functions of many pre-existing (or legacy) systems, this will allow the deactivation and removal of these systems. The benefits of removing these legacy systems are primarily in the savings of resources (e.g., financial, logistical support, and space) that are currently devoted to the operation and maintenance of a number of older systems with many diverse operating systems. This paper will identify and delineate the latest operational and transitional plans along with issues that need addressing before these systems can be fully replaced by AWIPS, and legacy systems deactivated, decommissioned, and removed from field operations